Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Statutory tax rate, percentage	21.00%	21.00%	21.00%
Deferred tax assets, net of operating losses	$ 14,700
Deferred tax assets, net of operating losses	1,500
Undistributed earnings of foreign subsidiaries	200
Lapses of applicable statute of limitations	$ 0	$ 329	$ 3,060
Minimum
Operating Loss Carryforwards [Line Items]
Statute of limitations expiration period, in years	4 years
Maximum
Operating Loss Carryforwards [Line Items]
Statute of limitations expiration period, in years	10 years
Federal
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	$ 500
Deferred tax assets, net of operating losses	100
State
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	10,200
Deferred tax assets, net of operating losses	300
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	4,000
Deferred tax assets, net of operating losses	$ 1,100
Germany and Brazil
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses		$ 1,700