Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Income Taxes [Line Items]
Effective tax rate	35.20%	34.40%	34.50%
Research tax credit	(1.10%)		(0.60%)
State and local income taxes, net of federal tax benefit, tax rate	1.70%	1.00%	1.00%
Expiry date of federal research tax credits	2011	2011
Renewal date of federal research tax credits	2013
Percentage of Increase in Deferred tax		0.50%	0.20%
Provision for income taxes	$ 6,400,000	$ 1,500,000	$ 1,400,000
Provision For Income Tax Reported In Accumulated other comprehensive income	700,000	100,000	500,000
Financial reporting year	3 years
Valuation allowance deemed against domestic deferred tax assets	2,266,000	2,287,000
Valuation allowance against U.S. foreign tax credits	2,300,000
Reserve for uncertain tax positions	6,200,000	4,600,000
Unrecognized tax benefits	4,800,000	4,600,000	900,000
Interest and penalties	56,000	78,000	300,000
Tax provision interest for the year ended December 31,2012	14,000
Net Federal benefit		100,000	25,000
Uncertain tax positions period	12 months
Significant undistributed earnings of foreign subsidiaries		0
Annual limitations of net operating losses	4,900,000
Expiry date of net operating loss carryforwards	2020
Audit period under internal revenue service and foreign jurisdictions	2010 through 2013
Audit period under income tax returns	2009 through 2013
Minimum [Member]
Schedule Of Income Taxes [Line Items]
Annual limitations of net operating losses period	2013
Maximum [Member]
Schedule Of Income Taxes [Line Items]
Annual limitations of net operating losses period	2016
Domestic Tax Authority [Member]
Schedule Of Income Taxes [Line Items]
Valuation allowance deemed against domestic deferred tax assets	0	0
Net operating loss carryforwards	7,000,000
State and Local Jurisdiction [Member]
Schedule Of Income Taxes [Line Items]
Net operating loss carryforwards	$ 3,300,000