Debt (Reconciliation Of Secured And Unsecured Contingent Obligation At Fair Value) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Secured Debt [Abstract]
Secured contingent payment obligation	$ 37,372
Secured contingent payment obligation	38,612	$ 37,372
Unsecured Debt [Member]
Secured Debt [Abstract]
Change in fair value	(843)	57
Unsecured Debt [Abstract]
Unsecured contingent payment obligation	5,691	5,222
Issuance of contingent payment rights		412
Change in fair value	(843)	57
Unsecured contingent payment obligation	4,848	5,691
Contingent Payment Obligation [Member] | Secured Debt [Member]
Secured Debt [Abstract]
Secured contingent payment obligation	37,372	33,057
Change in fair value	1,240	4,315
Secured contingent payment obligation	38,612	37,372
Unsecured Debt [Abstract]
Change in fair value	$ 1,240	$ 4,315