Debt Schedule of Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 167,369	$ 170,119
Debt Instrument, Unamortized Discount	(666)	(899)
Deferred Finance Costs, Net	(3,697)	(4,008)
Total debt, net of unamortized discount and deferred financing costs	163,006	165,212
Less: current maturities	(11,000)	(11,000)
Long-term debt, net of current maturities	152,006	154,212
KeyBank Credit Agreement
Debt Instrument [Line Items]
Long-term Debt, Gross	107,250	110,000
Tranche B Loan
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 60,119	$ 60,119