Summary Of Major Accounting Policies Allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 1,800	$ 1,500	$ 4,700	$ 4,000
Financing Receivable, Allowance for Credit Loss	600		600				$ 300
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	572,335	$ 477,298	$ 572,335	$ 477,298	$ 551,482	$ 526,306	525,804	$ 476,728	$ 502,055	$ 511,024
Financing Receivable Allowance for Credit Losses Evaluation Period			3 years
Proceeds, Accounts Receivable, Previously Written off, Recovery	1,800
Accounts and Financing Receivable, Allowance for Credit Loss	$ 2,100		$ 2,100				$ 2,000