Notes Payable - Schedule of Debt (Details) - Senior Notes [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Notes Payable	$ 372,494	$ 371,774
Series C Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	5.64%
Carrying Value	$ 47,788	47,772
Series D Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	5.72%
Carrying Value	$ 16,896	16,891
Series E Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	4.46%
Carrying Value	$ 74,493	74,470
Series F Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	4.55%
Carrying Value	$ 59,555	59,545
Series G Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	4.64%
Carrying Value	$ 39,685	39,679
Series H Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	3.42%
Carrying Value	$ 30,593	30,003
Series I Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	2.20%
Carrying Value	$ 37,805	37,785
Series J Senior Notes [Member]
Debt Instrument [Line Items]
Effective Annual Interest Rate (as a percent)	5.02%
Carrying Value	$ 65,679	$ 65,629