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Components of Income Tax (Benefit) Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 5,136	$ 573	$ (4,256)
State	(122)	417	251
Foreign	655	991	934
Deferred:
Federal	(1,345)	(319)	3,492
State	1,216	347	(872)
Total income tax expense (benefit)	$ 5,540	$ 2,009	$ (451)

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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