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Components of Operating Expenses - Components of General and Administrative Expenses and Other Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Business Acquisition [Line Items] |  |
Fixed compensation expense | $ 15,359 | $ 14,628
Annual variable compensation expense | 4,005 | 3,357
Long-term incentive award expense | 7,942 | 5,660
Systems and consulting | 3,112 | 3,184
Office costs | 2,040 | 2,025
Accounting and legal | 919 | 1,675
Corporate costs | 929 | 864
Other | 1,249 | 1,883
Total General and Administrative Expenses | 35,555 | 33,276
Portfolio Management Costs | 3,510 | 1,578
Loan Acquisition Costs | 1,289 | 4,465
Amortization of purchase-related intangible assets | 3,107 | 3,534
Other | 577 | 551
Total Other Expenses | 3,684 | 4,085
Total Operating Expenses | 44,038 | 43,404
Severance and transition-related expenses | 1,000 |
Settlement in Common Stock |  |
Business Acquisition [Line Items] |  |
Long-term incentive award expense | 6,000 | 5,000
Settlement in Cash |  |
Business Acquisition [Line Items] |  |
Long-term incentive award expense | $ 2,000 | $ 1,000

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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