Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Financing Receivable, Allowance for Credit Loss	$ 300
Interest Receivable	1,200
Financing Receivable, Allowance for Credit Loss [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	502,055	$ 548,345	$ 511,024	$ 558,157
Interest Receivable	1,200
Financing Receivable, Allowance for Credit Loss	300
Accounts and Financing Receivable, Allowance for Credit Loss	700
Foreign Currency Transaction Gain (Loss), before Tax	$ 400	$ (1,900)