Receivables and Allowance for Credit Losses - Past Due Balances Of Mezzanine And Other Notes Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Notes receivable	$ 139,211	$ 137,683
Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	109,628	108,370
Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	27,977	27,801
Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	1,606	1,512
1- 30 days Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
1- 30 days Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
1- 30 days Past Due | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
1- 30 days Past Due | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
31-89 days Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	15,200	0
31-89 days Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	15,200	0
31-89 days Past Due | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
31-89 days Past Due | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
> 90 days Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	2,209	2,209
> 90 days Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
> 90 days Past Due | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	2,209	2,209
> 90 days Past Due | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
Total Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	17,409	2,209
Total Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	15,200	0
Total Past Due | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	2,209	2,209
Total Past Due | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	0	0
Current
Financing Receivable, Past Due [Line Items]
Notes receivable	121,802	135,474
Current | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	94,428	108,370
Current | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	25,768	25,592
Current | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	$ 1,606	$ 1,512