Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017
Income Tax [Line Items]
Tax computed at statutory rate	21.00%	21.00%	21.00%	35.00%
Percentage of incremental tax benefit		14.00%
Net operating loss carryback under CARES act	$ 4,948	$ 30,167
Tax year audited	2018
Federal [Member] | From 2018 Through 2021 Tax Years [Member]
Income Tax [Line Items]
Tax credit carryforwards	$ 2,300
State [Member] | From 2018 Through 2021 Tax Years [Member]
Income Tax [Line Items]
Tax credit carryforwards	2,300
State [Member] | 2003 Through 2020 Tax Years [Member]
Income Tax [Line Items]
Net operating loss carryforwards	$ 58,400
Operating loss carryforwards, originated tax years	2003 through 2020
Net operating loss carryforwards, expiration year	2023
Operating loss carryforwards valuation allowance	$ 58,400
Deferred tax assets valuation allowance	$ 3,600
Federal And State | From 2018 Through 2021 Tax Years [Member]
Income Tax [Line Items]
Tax credit carryforwards, originated tax years	2018 through 2021
Federal And State | From 2018 Through 2021 Tax Years [Member] | Minimum [Member]
Income Tax [Line Items]
Tax credit carryforwards, expiration year	2025