Schedule IV Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Mortgage Loans on Real Estate
Carrying Amount of Mortgages	$ 23,515	$ 23,098	$ 24,055
Federal income tax basis of mortgage loan	23,900
Reconciliation of Carrying Value of Mortgage Loans on Real Estate:
Beginning balance	23,098	24,055	31,582
Additions:
Unrealized gain	417	0	0
Deductions:
Collection of principal	0	136	7,527
Unrealized loss	0	821	0
Ending balance	23,515	$ 23,098	$ 24,055
Private Placement
Mortgage Loans on Real Estate
Face Amount of Mortgages	23,919
Carrying Amount of Mortgages	23,515
Principal Amount of Loans Subject to Delinquent Principal or Interest	0
Deductions:
Ending balance	23,515
TEXAS | Hotel | Private Placement
Mortgage Loans on Real Estate
Face Amount of Mortgages	23,919
Carrying Amount of Mortgages	23,515
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Interest rate	8.50%
Deductions:
Ending balance	$ 23,515