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Components of Income Tax (Benefit) Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 573	$ (4,256)	$ 12,285
State	417	251	3,007
Foreign	991	934	1,101
Deferred:
Federal	(319)	3,492	2,213
State	347	(872)	310
Total income tax expense (benefit)	$ 2,009	$ (451)	$ 18,916

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