Notes Receivable (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable more than 90 days past due		$ 24,000	$ 25,500
Notes receivable		551,393	589,198
Accrued interest		3,900	$ 5,300
Scenario, Plan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated increase in defaults	$ 6,000	$ 6,000
Notes Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted-average interest rate		15.00%	14.90%
Over 91 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 23,963	$ 25,542