Income Taxes Unrecognized Tax Benefits Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning	$ 2,250	$ 3,020
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	150	110
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	0	0
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	0
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(760)	(880)
Unrecognized Tax Benefits, Ending	$ 1,640	$ 2,250