Fair Value Measurements - Fair Value of Company's Fixed Rate Senior Notes and Junior Subordinated Debentures (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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6.375% Senior Notes [Member] | Estimated Fair Value [Member] | ||
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
Debt |
$ 315,563us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = hlm_SixPointThreeSevenFivePercentSeniorNotesMember |
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6.375% Senior Notes [Member] | Carrying Amount [Member] | ||
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
Debt |
330,000us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = hlm_SixPointThreeSevenFivePercentSeniorNotesMember |
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10.875% Senior Notes [Member] | Estimated Fair Value [Member] | ||
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
Debt |
285,538us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = hlm_TenPointEightSevenFivePercentageSeniorNotesMember |
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10.875% Senior Notes [Member] | Carrying Amount [Member] | ||
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
Debt |
271,750us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = hlm_TenPointEightSevenFivePercentageSeniorNotesMember |
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Junior Subordinated Debentures [Member] | Estimated Fair Value [Member] | ||
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
Debt |
137,764us-gaap_DebtInstrumentFairValue / us-gaap_DebtInstrumentAxis = hlm_JuniorSubordinatedDebenturesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
131,480us-gaap_DebtInstrumentFairValue / us-gaap_DebtInstrumentAxis = hlm_JuniorSubordinatedDebenturesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
Junior Subordinated Debentures [Member] | Carrying Amount [Member] | ||
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] | ||
Debt |
$ 130,685us-gaap_DebtInstrumentFairValue / us-gaap_DebtInstrumentAxis = hlm_JuniorSubordinatedDebenturesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
$ 114,941us-gaap_DebtInstrumentFairValue / us-gaap_DebtInstrumentAxis = hlm_JuniorSubordinatedDebenturesMember / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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