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Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Tax cuts and jobs act of 2017 complete accounting deemed repatriation federal tax	$ 5,200
Tax cuts and jobs act of 2017 complete accounting estimated payments of liability	1,100
Deferred Tax Assets, Gross	40,525	$ 36,484
Deferred Tax Assets, Tax Credit Carryforwards	7,879	9,156
Deferred Tax, Operating Loss Carryforwards	5,371	4,707
Valuation allowance	4,276	3,356
Liability for uncertain tax positions	400	400
Increase (decrease) in uncertain tax liability including interest and penalties	400
Income Taxes Paid	17,200	27,300	$ 14,600
Continuing Operations
Operating Loss Carryforwards [Line Items]
Expected tax position to be resolved or settled	100
2016 \| Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Decrease in U.S. foreign tax credits	100
Decrease in additional tax expenses	300
2016 & 2017 \| Canada Revenue Agency
Operating Loss Carryforwards [Line Items]
Decrease in depreciable assets	600
Decrease in additional liabilities	100
Foreign Income Tax Credit
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards	5,400
Alternative Minimum Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	1,900
U.S
Operating Loss Carryforwards [Line Items]
Research and development credit carryforwards	600
Valuation allowance	4,300	3,400
U.S \| Foreign Income Tax Credit
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards	$ 4,700
Tax credit carryforward expiration year	2021
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 3,200
Foreign Tax Authority \| Foreign Income Tax Credit \| United Kingdom
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards	700
State and Foreign
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	55,200	49,100
Deferred Tax, Operating Loss Carryforwards	5,400	$ 4,700
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 1,900
State and Local Jurisdiction \| Latest Tax Year
Operating Loss Carryforwards [Line Items]
Tax credit carryforward expiration year	2020
State and Local Jurisdiction \| Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Tax credit carryforward expiration year	2038