Components of Operating Expenses - Components of General and Administrative Expenses and Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Business Acquisition [Line Items]
Fixed compensation expense	$ 16,257	$ 15,359
Annual variable compensation expense	2,917	4,005
Long-term incentive award expense	6,487	7,942
Systems and consulting	3,201	3,112
Office costs	2,082	2,040
Accounting and legal	1,217	919
Corporate costs	872	929
Other	1,536	1,249
Total General and Administrative Expenses	34,569	35,555
Portfolio Management Costs	3,597	3,510
Commissions	881	828
Underwriting costs	682	242
Transfer and holding costs	674	219
Total Loan Acquisition Costs	2,237	1,289
Amortization of purchase-related intangible assets	2,805	3,107
Other	556	577
Total Other Expenses	3,361	3,684
Total Operating Expenses	43,764	44,038
Severance and transition-related expenses	2,000	1,000
Equity amortization expense	1,000	100
Settlement in Common Stock
Business Acquisition [Line Items]
Long-term incentive award expense	6,000	6,000
Settlement in Cash
Business Acquisition [Line Items]
Long-term incentive award expense	$ 1,000	$ 2,000