Components of Income Tax Expense (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 3,780us-gaap_CurrentFederalTaxExpenseBenefit	$ 4,859us-gaap_CurrentFederalTaxExpenseBenefit	$ 4,418us-gaap_CurrentFederalTaxExpenseBenefit
State	367	472	429
Foreign	4,433us-gaap_CurrentForeignTaxExpenseBenefit	3,751us-gaap_CurrentForeignTaxExpenseBenefit	5,537us-gaap_CurrentForeignTaxExpenseBenefit
Current income tax expense	8,580us-gaap_CurrentIncomeTaxExpenseBenefit	9,082us-gaap_CurrentIncomeTaxExpenseBenefit	10,384us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	306	(1,105)	(1,871)
State	30	(108)	(183)
Foreign	(5,043)	(516)	(386)
Deferred income tax benefit	(4,707)us-gaap_DeferredIncomeTaxExpenseBenefit	(1,729)us-gaap_DeferredIncomeTaxExpenseBenefit	(2,440)us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense	$ 3,873us-gaap_IncomeTaxExpenseBenefit	$ 7,353us-gaap_IncomeTaxExpenseBenefit	$ 7,944us-gaap_IncomeTaxExpenseBenefit

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

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