Receivables and Allowance for Credit Losses - Past Due Balances Of Mezzanine And Other Notes Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Notes receivable	$ 110,946	$ 118,215
Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	86,374	95,466
Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	19,592	17,075
Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	4,980	5,674
Total Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	44,954	17,508
Total Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	44,283	15,200
Total Past Due | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	271	2,209
Total Past Due | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	400	99
1- 30 days Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	0	20
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	20
31-89 days Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	0	15,240
31-89 days Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	0	15,200
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	40
> 90 days Past Due
Financing Receivable, Past Due [Line Items]
Notes receivable	44,954	2,249
> 90 days Past Due | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	44,283	0
> 90 days Past Due | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	271	2,209
> 90 days Past Due | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	400	40
Current
Financing Receivable, Past Due [Line Items]
Notes receivable	65,992	100,707
Current | Senior
Financing Receivable, Past Due [Line Items]
Notes receivable	42,091	80,266
Current | Subordinated
Financing Receivable, Past Due [Line Items]
Notes receivable	19,321	14,866
Current | Unsecured
Financing Receivable, Past Due [Line Items]
Notes receivable	$ 4,580	$ 5,575