Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Capital loss carryforward	$ 400	$ 600	$ 400
Loss carryforwards	4,400	4,900
Capital loss carryforwards with valuation allowance	5,200	5,100
Tax credits	2,300	2,400
Undistributed earnings of foreign subsidiaries	15,200
Estimated unrecognized deferred income tax liabilities related to undistributed earnings of foreign subsidiaries	200
Unrecognized tax benefits	4,962	5,490	6,274	$ 7,074
Unrecognized tax benefits that will impact tax rate if recognized	4,000	4,100
Unrecognized tax benefit income tax interest and penalties accrued	1,100	900
Unrecognized tax benefits, income tax penalties and interest expense	100	100
Maximum
Income Taxes [Line Items]
Maximum unrecognized tax benefits expected to be recorded in next twelve months	1,700	1,200
State and Local Jurisdiction
Income Taxes [Line Items]
Valuation allowances against current year net operating losses in certain tax jurisdictions	1,300	800	300
Capital loss carryforward	100	800	$ 300
CANADA
Income Taxes [Line Items]
Adjusted loss carryforward and related valuation allowance	300
Loss carryforwards	$ 3,100	$ 2,400
Operating loss carryforwards expiration year	2031	2031
Capital loss carryforwards with valuation allowance	$ 4,700	$ 4,300
Tax credits	1,800	1,700
CANADA | Tax Credit That Will Expire In Certain Period
Income Taxes [Line Items]
Tax credits	$ 1,100	$ 1,100
Tax credits, expiration Year	2022	2022
CANADA | Tax Credits That Can Be Carried Forward Indefinitely
Income Taxes [Line Items]
Tax credits	$ 700	$ 600
UNITED STATES
Income Taxes [Line Items]
Loss carryforwards	$ 1,300	$ 1,600
Operating loss carryforwards expiration year	2035	2034
Capital loss carryforwards with valuation allowance		$ 400
Tax credits	$ 500	700
UNITED STATES | Tax Credit That Will Expire In Certain Period
Income Taxes [Line Items]
Tax credits	$ 400	$ 600
Tax credits, expiration Year	2031	2030
UNITED STATES | Tax Credits That Can Be Carried Forward Indefinitely
Income Taxes [Line Items]
Tax credits	$ 100	$ 100
UNITED KINGDOM
Income Taxes [Line Items]
Loss carryforwards		700
Capital loss carryforwards with valuation allowance	$ 500	400
Other Countries
Income Taxes [Line Items]
Loss carryforwards		$ 200
Operating loss carryforwards expiration year		2020