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Debt Obligations - Long-term Debt Obligations (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
Borrowings under credit facility $ 479,723 $ 466,850
Other long-term debt, interest rates ranging from 3.5% to 4.3% 3,439 5,401
Capital leases, interest rates ranging from 2.5% to 6.2% 4,298 5,351
Total long-term debt obligations 487,460 477,602
Total long-term debt obligations 487,460 477,602
Less - Current maturities of long-term debt 5,061 2,238
Total long-term debt obligations, net of current maturities $ 482,399 $ 475,364