Summary Of Major Accounting Policies Allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 300
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	502,055	$ 511,024	$ 548,345	$ 558,157
Interest Receivable	$ 1,200
Financing Receivable Allowance for Credit Losses Evaluation Period	5 years