Other Debt - Summary of Maximum Borrowing Capacity and Current Gross Balances Outstanding (Details) - USD ($)		Jun. 30, 2024	Dec. 31, 2023	Apr. 16, 2021	Jan. 29, 2021	Sep. 12, 2018
Debt Instrument [Line Items]
Period End Balance	[1]	$ 238,541,000	$ 336,351,000
Maximum Borrowing Capacity		885,000,000	890,530,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum Borrowing Capacity						$ 50,000,000.0
2021 Term Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Period End Balance	[1]	24,550,000	30,460,000
Maximum Borrowing Capacity		100,000,000	100,000,000	$ 100,000,000.0
2021 Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Period End Balance	[1]	42,466,000	88,817,000
Maximum Borrowing Capacity		200,000,000	200,000,000		$ 200,000,000.0
July 2021 Term Repurchase Agreement
Debt Instrument [Line Items]
Maximum Borrowing Capacity		100,000,000.0
July 2021 Term Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Period End Balance	[1]	20,105,000	22,516,000
Maximum Borrowing Capacity		100,000,000	100,000,000
2013 Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Period End Balance	[1]	101,424,000	111,086,000
Maximum Borrowing Capacity		300,000,000	300,000,000
Bank Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Period End Balance	[1]	24,496,000	31,950,000
Maximum Borrowing Capacity		50,000,000	50,000,000
October 2023 Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Period End Balance	[1]		29,522,000
Maximum Borrowing Capacity			30,530,000
September 2022 Term Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Maximum Borrowing Capacity		60,000,000	60,000,000
2023 Repurchase Agreement | Secured Debt
Debt Instrument [Line Items]
Period End Balance	[1]	25,500,000	22,000,000
Maximum Borrowing Capacity		$ 75,000,000	$ 50,000,000

[1] Warehouse repurchase facilities amounts in the consolidated balance sheets are net of debt issuance costs amounting to $1.1 million and $1.6 million as of June 30, 2024 and December 31, 2023, respectively.