Long-Term Debt - Additional Information (Detail) (USD $)
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12 Months Ended |
0 Months Ended |
Dec. 31, 2014
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Dec. 31, 2013
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Jun. 30, 2014
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Debt Instrument [Line Items] |
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Interest underlying the Trust Preferred Securities |
11.60%hlm_TrustPreferredSecuritiesInterestRate
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Face amount Subordinated Debentures underlying Trust Preferred Securities |
$ 105,443,000hlm_TrustPreferredSecurityAtFaceValue
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Aggregate amount of Subordinated Debentures underlying Trust Preferred Securities |
12,231,000hlm_InterestOnTrustPreferredSecuritiesAmount
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Deferral Period of distribution payments to holders of the Trust Preferred Securities |
60 months
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Deferrals of distribution payments to holders of Trust Preferred Securities |
0us-gaap_InterestExpenseTrustPreferredSecurities
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0us-gaap_InterestExpenseTrustPreferredSecurities
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Trust Preferred Securities, redemption description |
The Trust will redeem the preferred securities when the debentures are repaid, or at maturity on September 30, 2027.
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Maturity date of trust preferred securities |
Sep. 30, 2027
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Letter of credit commitments outstanding |
3,723,000us-gaap_LettersOfCreditOutstandingAmount
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Prior Credit Agreement [Member] |
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Debt Instrument [Line Items] |
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Senior Notes, maturity date |
May 28, 2017
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6.375% Senior Notes [Member] |
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Debt Instrument [Line Items] |
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Principal amount of Senior Notes |
330,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = hlm_SixPointThreeSevenFivePercentSeniorNotesMember
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Interest rate on Senior Notes |
6.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = hlm_SixPointThreeSevenFivePercentSeniorNotesMember
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6.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = hlm_SixPointThreeSevenFivePercentSeniorNotesMember
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Senior Notes, maturity date |
Jul. 15, 2022
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10.875% Senior Notes [Member] |
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Debt Instrument [Line Items] |
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Interest rate on Senior Notes |
10.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = hlm_TenPointEightSevenFivePercentageSeniorNotesMember
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10.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = hlm_TenPointEightSevenFivePercentageSeniorNotesMember
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Senior Notes, maturity date |
Jun. 01, 2018
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10.875% Senior Notes [Member] | Prior Credit Agreement [Member] |
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Debt Instrument [Line Items] |
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Principal amount of Senior Notes |
265,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_InvestmentTypeAxis = hlm_OldCreditAgreementMember / us-gaap_LongtermDebtTypeAxis = hlm_TenPointEightSevenFivePercentageSeniorNotesMember
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Interest rate on Senior Notes |
10.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_InvestmentTypeAxis = hlm_OldCreditAgreementMember / us-gaap_LongtermDebtTypeAxis = hlm_TenPointEightSevenFivePercentageSeniorNotesMember
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Term Loan B [Member] |
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Debt Instrument [Line Items] |
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LIBOR interest rate in Term B Loans |
4.50%hlm_LiborInterestRate / us-gaap_LongtermDebtTypeAxis = hlm_TermBLoanMember
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Senior Secured Credit Facility [Member] |
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Debt Instrument [Line Items] |
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Senior secured credit facility consisting of revolver and term loan |
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620,000,000us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = hlm_SeniorSecuredCreditFacilityMember
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Term Loan [Member] |
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Debt Instrument [Line Items] |
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Credit facility |
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550,000,000us-gaap_LoansPayable / us-gaap_CreditFacilityAxis = hlm_TermLoanMember
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Maturity term of loan |
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7 years
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Debt instrument variable rate description |
The Senior Facilities provide term loan borrowings at interest rates based on LIBOR plus a LIBOR Spread of 3.50%, or an Alternate Base Rate ("ABR") plus an ABR Spread of 2.50%.
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Adjusted interest rate |
4.50%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_CreditFacilityAxis = hlm_TermLoanMember
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Term Loan [Member] | Prior Credit Agreement [Member] |
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Debt Instrument [Line Items] |
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Credit facility |
384,400,000us-gaap_LoansPayable / us-gaap_CreditFacilityAxis = hlm_TermLoanMember / us-gaap_InvestmentTypeAxis = hlm_OldCreditAgreementMember
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Revolving Credit Facility [Member] |
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Debt Instrument [Line Items] |
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Credit facility |
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70,000,000us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
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Maturity term of loan |
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5 years
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Debt instrument variable rate description |
The Senior Facilities provide Revolver borrowings at interest rates based on LIBOR plus a LIBOR Spread of 3.25%, or an ABR plus an ABR Spread of 2.25%. There is no minimum floor rate for Revolver loans.
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Debt instrument maximum borrowing capacity |
35.00%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
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Letter of credit commitments outstanding |
66,277,000us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
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Revolving Credit Facility [Member] | Prior Credit Agreement [Member] |
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Debt Instrument [Line Items] |
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Credit facility |
30,000,000us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_InvestmentTypeAxis = hlm_OldCreditAgreementMember
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Letter of Credit [Member] |
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Debt Instrument [Line Items] |
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Debt instrument maximum borrowing capacity |
5.00%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember
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Letter of credit commitments outstanding |
3,700,000us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember
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Secured Credit Facility [Member] |
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Debt Instrument [Line Items] |
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Credit facility |
547,857,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_CreditFacilityAxis = hlm_SecuredCreditFacilityMember
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Credit facility |
607,000us-gaap_CapitalLeaseObligations / us-gaap_CreditFacilityAxis = hlm_SecuredCreditFacilityMember
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Secured Credit Facility [Member] | Term Loan B [Member] |
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Debt Instrument [Line Items] |
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Credit facility |
$ 547,250,000us-gaap_LoansPayable / us-gaap_CreditFacilityAxis = hlm_SecuredCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = hlm_TermBLoanMember
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London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] |
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Debt Instrument [Line Items] |
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Debt instrument spread variable rate |
3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hlm_TermLoanMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember
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London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] | Minimum [Member] |
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Debt Instrument [Line Items] |
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Debt instrument floor rate |
1.00%hlm_DebtInstrumentFloorRate / us-gaap_CreditFacilityAxis = hlm_TermLoanMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember
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London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] |
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Debt Instrument [Line Items] |
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Debt instrument spread variable rate |
3.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember
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Adjusted interest rate |
3.25%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember
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Alternate Base Rate [Member] | Term Loan [Member] |
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Debt Instrument [Line Items] |
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Debt instrument spread variable rate |
2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = hlm_TermLoanMember / us-gaap_VariableRateAxis = hlm_AlternateBaseRateMember
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Alternate Base Rate [Member] | Term Loan [Member] | Minimum [Member] |
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Debt Instrument [Line Items] |
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Debt instrument floor rate |
2.00%hlm_DebtInstrumentFloorRate / us-gaap_CreditFacilityAxis = hlm_TermLoanMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = hlm_AlternateBaseRateMember
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Alternate Base Rate [Member] | Revolving Credit Facility [Member] |
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Debt Instrument [Line Items] |
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Adjusted interest rate |
2.25%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = hlm_AlternateBaseRateMember
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Base Rate [Member] | Revolving Credit Facility [Member] |
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Debt Instrument [Line Items] |
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Debt instrument spread variable rate |
2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember
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