Income Taxes Unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unrecognized tax benefits roll forward [Roll Forward]
Unrecognized Tax Benefits	$ 21,537	$ 18,443	$ 15,027	$ 10,824
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	231	502	138
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	3,242	2,987	4,231
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	0	(15)	(3)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(31)	(58)	(163)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 348	$ 0	$ 0