Components of Income Tax Expense (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ 4,859	$ 4,418	$ 4,356
State	472	429	423
Foreign	3,751	5,537	4,195
Current income tax expense (benefit)	9,082	10,384	8,974
Deferred:
Federal	(1,105)	(1,871)	(400)
State	(108)	(183)	(40)
Foreign	(516)	(386)	(206)
Deferred income tax expense (benefit)	(1,729)	(2,440)	(646)
Income tax expense (benefit)	$ 7,353	$ 7,944	$ 8,328