Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum	Dec. 31, 2013 Research And Development	Dec. 31, 2011 Federal and state	Dec. 31, 2013 Foreign Tax Authority	Dec. 31, 2012 Foreign Tax Authority	Dec. 31, 2011 Foreign Tax Authority	Dec. 31, 2013 Federal	Dec. 31, 2013 State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Deferred tax asset	$ 60,900,000
Deferred tax assets, valuation allowances	17,200,000					53,500,000		17,500,000	17,200,000
Deferred tax liabilities	11,500,000
Deferred tax asset, increase in equity	2,100,000
Net deferred tax asset	32,217,000	31,821,000
Net operating loss carryforwards							59,800,000			25,900,000	80,000,000
Tax credits carried forward					1,300,000
Federal research and development tax credit carryforward expiration year			2027	2033
Alternative minimum tax credit carryforward	500,000
Undistributed earnings	37,700,000
Cash held by foreign subsidiaries	19,600,000
Unrecognized tax benefits related to various federal and state income tax positions	200,000	400,000
Accrued for the payment of interest and penalties	100,000	200,000
Accrued interest and penalties are included in the unrecognized tax benefits	200,000
Unrecognized tax reserves, interest and penalties to be released due to statute of limitations	$ 200,000