Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended					12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013 State and Local Jurisdiction	Dec. 31, 2013 Foreign Tax Authority	Dec. 31, 2013 Lower Penalties	Dec. 31, 2012 Lower Penalties	Dec. 31, 2013 UNITED STATES	Dec. 31, 2013 CANADA	Dec. 31, 2013 CANADA Expires through 2022	Dec. 31, 2013 CANADA Carried forward indefinitely	Dec. 31, 2013 UNITED KINGDOM	Dec. 31, 2013 Other Countries
Income Taxes [Line Items]
Adjusted loss carryforward and related valuation allowance							$ 700,000				$ 4,800,000
Valuation allowances against current year net operating losses in certain tax jurisdictions						1,300,000
Released valuation allowance previously recorded on certain U.S. state tax credits						300,000
Tax benefit recognized due to the release of a portion of the valuation allowance on deferred tax assets	15,300,000	15,300,000
Loss carryforwards			10,000,000							1,800,000	7,100,000			700,000	400,000
Operating loss carryforwards expiration year										2033	2015
Tax credits	5,101,000	5,101,000	3,817,000							1,600,000	2,200,000	1,400,000	800,000
Tax credits, expiration Year										2033		2022
Undistributed earnings of foreign subsidiaries			13,900,000
Unrecognized Tax Benefits	7,554,000	7,554,000	7,074,000	7,284,000	5,088,000			300,000	600,000
Unrecognized tax benefits that will impact tax rate if recognized	4,300,000	4,300,000	4,900,000
Settlements with taxation authorities		3,035,000
Maximum unrecognized tax benefits expected to be recorded in next twelve months			2,100,000
Unrecognized tax benefit income tax interest and penalties accrued	$ 600,000	$ 600,000	$ 300,000