Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes [Line Items]
Decrease in deferred tax assets valuation allowance	$ (300,000)
Decrease in unrecognized tax benefits due to the expiration of statutes of limitations and the settlement of various audits	3,000,000
Accrued interest and penalties related to income tax liabilities		1,500,000	2,200,000
Aggregate amount of interest and penalties recorded in the statement of operations	(500,000)	400,000	300,000
Undistributed earning of foreign subsidiaries	71,500,000
Unrecognized tax benefit	4,012,000	8,414,000	10,916,000	11,535,000
Net unrecognized tax benefits that, if recognized, would favorably impact the effective income tax rate	3,700,000	5,700,000
Domestic Country | Begin to expire in 2025
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards	6,000,000
Foreign Entities
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards	12,800,000
Valuation allowance against the tax benefit associated with NOLs	2,700,000
Capital loss carryforwards	500,000
Foreign tax credits carryforwards	500,000
Foreign Entities | Net Operating Loss Carryforwards with Indefinite Carryforward Period
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards	11,300,000
Domestic Country
Income Taxes [Line Items]
Capital loss carryforwards	8,900,000
General business tax credit carryforwards	100,000
Foreign Subsidiaries
Income Taxes [Line Items]
Foreign tax credits carryforwards	1,400,000
Valuation allowance against tax credit	$ 1,000,000