Summary Of Major Accounting Policies Allowance for credit losses (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	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, Writeoff		$ 2,500,000	$ 1.5
Financing Receivable, Allowance for Credit Loss	$ 500,000	500,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	476,728,000	476,728,000	$ 562,732,000	$ 502,055,000	$ 511,024,000	$ 548,345,000	$ 558,157,000
Interest Receivable	$ 1,000,000	$ 1,000,000			$ 1,200,000
Financing Receivable Allowance for Credit Losses Evaluation Period	3 years