Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Income Tax [Line Items]
Change in net deferred taxes	$ 1,827,000
Net deferred tax asset	548,000
Net deferred benefit , reserve for uncertain tax positions	1,912,000
Foreign currency translation adjustments	633,000
Deferred tax assets, valuation allowance	158,747,000	151,097,000
Tax credit carryforwards	11,584,000	6,024,000
Tax credit carryforward beginning expiration year	2020
Liability for income taxes associated with uncertain tax positions	11,851,000	7,064,000	9,875,000	9,121,000
Tax benefits associated with potential transfer pricing adjustments	2,773,000
Tax benefits associated with state income taxes and other timing adjustments	6,496,000
Net amount of unrecognized tax benefit related to uncertain tax positions that would impact, if recognized, effective income tax rate	2,582,000
Interest and penalties related to income tax matters	229,000	44,000	242,000
Income tax accrued for payment of interest and penalties	1,163,000	934,000
Undistributed earnings	109,437,000
Withholding taxes	1,200,000
United States
Schedule Of Income Tax [Line Items]
Increase to income tax expense			52,455,000
Deferred tax assets, valuation allowance	158,159,000	151,097,000
Federal
Schedule Of Income Tax [Line Items]
Tax credit carryforwards	7,571,000
State
Schedule Of Income Tax [Line Items]
Tax credit carryforwards	$ 9,400,000