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Fair Value of Financial Instruments - Carrying Value and Estimated Fair Value of Company's Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Participations sold | $ (25,130) | $ (27,064)
Commercial Mortgage Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Participations sold | (25,130) | (27,064)
Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Cash and cash equivalents | 222,030 | 343,106
Carrying Value | Level III |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Secured debt arrangements, net | (5,296,825) | (4,150,268)
Participations sold | (25,130) | (27,064)
Carrying Value | Level III | Secured Debt |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Term loans, net | (763,813) | (768,325)
Carrying Value | Level III | Senior Notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Term loans, net | (494,844) | (494,051)
Carrying Value | Level III | 2022 Notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Notes | 0 | (343,117)
Carrying Value | Level III | 2023 Notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Notes | (229,361) | (226,862)
Carrying Value | Level III | Commercial Mortgage Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 8,121,109 | 7,012,312
Carrying Value | Level III | Subordinate Mortgage Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 560,881 | 844,948
Estimate of Fair Value Measurement |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Cash and cash equivalents | 222,030 | 343,106
Estimate of Fair Value Measurement | Level III |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Secured debt arrangements, net | (5,296,825) | (4,150,268)
Participations sold | (25,130) | (27,064)
Estimate of Fair Value Measurement | Level III | Secured Debt |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Term loans, net | (731,709) | (782,995)
Estimate of Fair Value Measurement | Level III | Senior Notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Term loans, net | (400,950) | (489,175)
Estimate of Fair Value Measurement | Level III | 2022 Notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Notes | 0 | (347,552)
Estimate of Fair Value Measurement | Level III | 2023 Notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Notes | (225,366) | (231,150)
Estimate of Fair Value Measurement | Level III | Commercial Mortgage Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 8,083,410 | 6,945,038
Estimate of Fair Value Measurement | Level III | Subordinate Mortgage Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 558,740 | $ 725,906

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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