Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Capital loss carryforward	$ 600	$ 400
Loss carryforwards	4,900	4,500
Tax credits	2,400	4,200
Undistributed earnings of foreign subsidiaries	18,200
Estimated unrecognized deferred income tax liabilities related to undistributed earnings of foreign subsidiaries	400
Unrecognized tax benefits	5,490	6,274	$ 7,074	$ 7,554
Unrecognized tax benefits that will impact tax rate if recognized	4,100	4,100	4,900
Unrecognized tax benefit income tax interest and penalties accrued	900	900
Unrecognized tax benefits, income tax penalties and interest expense	100	300
Maximum
Income Taxes [Line Items]
Maximum unrecognized tax benefits expected to be recorded in next twelve months	1,200
CANADA
Income Taxes [Line Items]
Adjusted loss carryforward and related valuation allowance			4,800
Loss carryforwards	$ 2,400	$ 2,300
Operating loss carryforwards expiration year	2031	2015
Tax credits	$ 1,700	$ 2,100
CANADA | Tax Credit That Will Expire In Certain Period
Income Taxes [Line Items]
Tax credits	$ 1,100	$ 800
Tax credits, expiration Year	2022	2021
CANADA | Tax Credits That Can Be Carried Forward Indefinitely
Income Taxes [Line Items]
Tax credits	$ 600	$ 1,300
UNITED STATES
Income Taxes [Line Items]
Loss carryforwards	$ 1,600	$ 1,400
Operating loss carryforwards expiration year	2034	2033
Tax credits	$ 700
UNITED STATES | Tax Credit That Will Expire In Certain Period
Income Taxes [Line Items]
Tax credits	$ 600	$ 2,100
Tax credits, expiration Year	2030	2034
UNITED STATES | Tax Credits That Can Be Carried Forward Indefinitely
Income Taxes [Line Items]
Tax credits	$ 100
UNITED KINGDOM
Income Taxes [Line Items]
Loss carryforwards	700	$ 800
Other Countries
Income Taxes [Line Items]
Loss carryforwards	$ 200
Operating loss carryforwards expiration year	2020
State and Local Jurisdiction
Income Taxes [Line Items]
Valuation allowances against current year net operating losses in certain tax jurisdictions	$ 800	300	1,300
Capital loss carryforward	$ 800	$ 300	300
Foreign Tax Authority
Income Taxes [Line Items]
Adjusted loss carryforward and related valuation allowance			$ 700