Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Summary of Long-Term Debt (Detail)

v3.7.0.1
Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2014
Debt Instrument [Line Items]      
Long-term debt $ 975,276,000    
Senior secured credit facility consisting of revolver and term loan 973,455,000 $ 1,004,819,000  
Capitalized lease and other obligations 322,000 527,000  
Debt, Long-term and Short-term, Combined Amount 975,276,000 1,008,981,000  
Long-term Debt, Current Maturities (5,643,000) (5,717,000)  
Term Loan      
Debt Instrument [Line Items]      
Senior secured credit facility consisting of revolver and term loan 536,250,000 541,750,000  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving credit facility 0 28,000,000  
Junior Subordinated Debentures - Preferred [Domain]      
Debt Instrument [Line Items]      
Debt Instrument, Unamortized Premium $ 19,936,000 $ 21,003,000  
6.375% Senior Notes      
Debt Instrument [Line Items]      
Interest rate on Senior Notes 6.375% 6.375% 6.375%
Debt Instrument, Face Amount $ 330,000,000 $ 330,000,000 $ 330,000,000
Junior Subordinated Debentures - Preferred [Domain]      
Debt Instrument [Line Items]      
Face amount Subordinated Debentures underlying Trust Preferred Securities 105,443,000 105,443,000  
Trust Preferred Securities - Common [Domain]      
Debt Instrument [Line Items]      
Face amount Subordinated Debentures underlying Trust Preferred Securities   3,261,000  
Assets, Noncurrent 3,261,000    
Long-term Debt      
Debt Instrument [Line Items]      
Debt Issuance Costs, Net $ (16,114,000) $ (19,448,000)