Income Taxes - Reconciliation of Income Taxes Based on U.S. Federal Statutory Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
Income taxes at the federal statutory rate	$ 8,561	$ 6,916	$ 8,876
Impact of incentive stock options	261	371	163
Foreign tax credit expiration	818
Capital gain on return of basis		3,079
State income taxes, net of federal taxes	198	334	75
Non-U.S. earnings taxed at different rates	(834)	(1,606)	(2,116)
Change in uncertain tax positions	32	(115)
Other permanent differences, net	(218)	(166)	93
Total expense (benefit)	8,000	(3,927)	5,168
Domestic Tax Authority [Member]
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
Decrease in valuation allowance	(818)	(12,740)	(704)
Foreign Tax Authority [Member]
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
Decrease in valuation allowance			$ (1,219)