Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Additions for tax positions related to current year	$ 69	$ 0
Effective income tax rate	4.99%
Income Tax Benefit (Expense) Discrete Items	$ 236
Income tax expense	1,284	$ (1,084)
Income Tax Expense (Benefit), before discrete items	$ 1,000
Effective Income Tax Rate Reconciliation, Excluding Discrete Items, Percent	4.07%
Unrecognized Tax Benefits	$ 9,300			$ 9,200
Minimum [Member] | Scenario, Forecast
Operating Loss Carryforwards [Line Items]
Effective income tax rate			4.00%
Maximum [Member] | Scenario, Forecast
Operating Loss Carryforwards [Line Items]
Effective income tax rate			5.00%