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Debt Obligations - Long-term Debt Obligations (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
Borrowings under credit facility $ 351,341 $ 466,850
Other long-term debt, interest rates ranging from 3.4% to 4.3% 3,305 5,401
Capital leases, interest rates ranging from 2.5% to 6.2% 3,744 5,351
Total long-term debt obligations 358,390 477,602
Total long-term debt obligations 358,390 477,602
Less - Current maturities of long-term debt 4,828 2,238
Total long-term debt obligations, net of current maturities $ 353,562 $ 475,364