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Reconciliation of Differences between Federal Statutory and Effective Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
At statutory rate	$ 6,921	$ 3,192	$ 5,976
Non-deductible interest expense	1,948	1,777	2,136
State taxes, net of US federal benefit	339	211	393
Federal tax deductions	(648)	(19)	(19)
Change in applicable tax rate			308
Costs associated with possible restructuring		(940)	913
Provision to return permanent difference	933	(68)	(96)
Other	(99)	(24)	(93)
Total income tax expense	$ 9,394	$ 4,129	$ 9,518

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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