Notes Receivable and Current Expected Credit Losses (Changes in Allowance for Credit Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 1,599	$ 1,741	$ 994	$ 2,584
Unrealized credit loss provision	295	388	900	333
Extinguishment due to acquisition	0	0	0	(788)
Ending balance	1,894	$ 2,129	1,894	$ 2,129
Allowance for credit losses	$ 1,452		$ 1,452		$ 994