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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 |

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