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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Income taxes (benefit)		$ 4,174	$ 1,917	$ 4,560
Pre-tax income		$ (11,967)	$ 5,923	$ 12,451
Effective tax rate		34.90%	32.40%	36.60%
Corporate tax rates		(0.30%)	0.90%	2.40%
US federal income tax statutory rate		21.00%	21.00%	35.00%
Foreign income tax statutory rate		6.80%	8.90%	(9.10%)
Liability for uncertain tax positions taken on a foreign tax return		$ 800
Cash and cash equivalents held by foreign subsidiaries		24,600
Penalties and interest related to unrecognized tax benefits		100		$ 100
Income tax net operating loss carryforwards		18,500
Total deferred tax assets		3,329
Unrecognized tax benefits that would impact effective tax rate		$ 800
Colorado, Missouri And West Virginia [Member] | Minimum [Member]
Income Taxes [Line Items]
Corporate tax rates		4.50%
Colorado, Missouri And West Virginia [Member] | Maximum [Member]
Income Taxes [Line Items]
Corporate tax rates		6.50%
United States [Member]
Income Taxes [Line Items]
Effective tax rate		(3.10%)
Canada [Member]
Income Taxes [Line Items]
Effective tax rate		31.10%
Foreign income tax statutory rate		26.50%
Canada And Poland [Member]
Income Taxes [Line Items]
Percentage of income tax expense recorded		80.90%
Poland [Member]
Income Taxes [Line Items]
Effective tax rate		23.40%
Foreign income tax statutory rate		19.00%
United Kingdom [Member]
Income Taxes [Line Items]
Effective tax rate		(2.40%)
Foreign income tax statutory rate		19.00%
Mauritius [Member]
Income Taxes [Line Items]
Effective tax rate		1.10%
Foreign income tax statutory rate		3.00%
Austria [Member]
Income Taxes [Line Items]
Effective tax rate		41.80%
Foreign income tax statutory rate		25.00%
Hong Kong
Income Taxes [Line Items]
Effective tax rate		0.00%
Foreign income tax statutory rate		16.50%
Tax Act [Member]
Income Taxes [Line Items]
Tax expense for GILTI, net		$ 500
US federal income tax statutory rate	21.00%
Tax Act [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax expense for GILTI, net			$ 100

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