Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2021	Mar. 31, 2020	Dec. 31, 2021
Commitments And Contingencies [Abstract]
Standby letters of credit extension period, in years				1 year
Allowance against letters of credit	$ 2,400
Letters of credit cancelled		$ 636	$ 250
Accrued settlement payment				$ 1,500