Debt (Risk Retention Tower Securities - Schedule of Material Terms of Debt Repaid) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Amount Outstanding	$ 12,388,000	$ 12,952,000
2017-1R Tower Securities [Member]
Debt Instrument [Line Items]
Issue Date	Apr. 17, 2017
Amount Outstanding	$ 40,000
Interest Rate	4.459%
Anticipated Repayment Date	Apr. 11, 2022
Final Maturity Date	May 14, 2021
2018-2R Tower Securities [Member]
Debt Instrument [Line Items]
Issue Date	Mar. 09, 2018
Amount Outstanding	$ 33,700
Interest Rate	4.949%
Anticipated Repayment Date	Mar. 09, 2023
Final Maturity Date	Dec. 15, 2022