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Long Term Debt and Capital Leases (Net of Issuance Costs and Debt Discounts Excluding Line-of-credit Arrangements) (Detail) - USD ($)
$ in Thousands
Oct. 07, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Accounts receivable securitization facility $ 15,000 $ 95,000
Capital lease obligations 28,577 30,427
Other notes payable 13,356 16,866
Total debt and capital lease obligations 856,108 958,157
Current maturities of long-term debt and capital lease obligations 12,469 11,490
Total long-term debt and capital lease obligations 843,639 946,667
Unsecured Credit Facility    
Debt Instrument [Line Items]    
Unsecured credit facility 6,500 24,000
2026 Notes    
Debt Instrument [Line Items]    
Senior notes 394,847 394,406
2022 Notes    
Debt Instrument [Line Items]    
Senior notes $ 397,828 $ 397,458