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Long-Term Debt - Long-Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]    
Term Loan $ 316,600 $ 340,300
Less current maturities 3,750 3,750
Long term debt, net current portion $ 312,813 $ 336,563