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Fair Value Measurements - Schedule of Financial Assets and Financial Liabilities Measured at Fair Value (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Unrealized gain (loss) | $ 1,923,000 | $ (2,193,000) |
Measurement Input, Discount Rate |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Minimum range of unobservable inputs | 0.00% |  | 0.00%
Maximum range of unobservable inputs | 8.00% |  | 8.00%
Measurement Input, Appraisal Adjustments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Minimum range of unobservable inputs | 0.00% |  | 0.00%
Maximum range of unobservable inputs | 10.00% |  | 10.00%
Fair Value Measured at Net Asset Value Per Share |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity investment funds measured at NAV | $ 3,700,000 |  | $ 3,400,000
Items measured on a recurring basis |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities available-for-sale | 744,944,000 |  | 753,892,000
Equity investments | 54,788,000 |  | 53,166,000
Interest rate derivative asset | 104,149,000 |  | 87,776,000
Interest rate derivative liability | (105,118,000) |  | (87,848,000)
Items measured on a recurring basis | Level 1 Inputs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities available-for-sale | 46,989,000 |  | 43,036,000
Equity investments | 0 |  | 0
Interest rate derivative asset | 0 |  | 0
Interest rate derivative liability | 0 |  | 0
Items measured on a recurring basis | Level 2 Inputs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities available-for-sale | 697,955,000 |  | 710,856,000
Equity investments | 54,788,000 |  | 53,166,000
Interest rate derivative asset | 104,149,000 |  | 87,776,000
Interest rate derivative liability | (105,118,000) |  | (87,848,000)
Items measured on a recurring basis | Level 3 Inputs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities available-for-sale | 0 |  | 0
Equity investments | 0 |  | 0
Interest rate derivative asset | 0 |  | 0
Interest rate derivative liability | 0 |  | 0
Items measured on a non-recurring basis |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity investments | 48,413,000 |  | 46,997,000
Items measured on a non-recurring basis | Loans measured for impairment based on the fair value of the underlying collateral |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans measured for impairment based on the fair value of the underlying collateral | 22,206,000 |  | 18,509,000
Items measured on a non-recurring basis | Level 1 Inputs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity investments | 0 |  | 0
Items measured on a non-recurring basis | Level 1 Inputs | Loans measured for impairment based on the fair value of the underlying collateral |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans measured for impairment based on the fair value of the underlying collateral | 0 |  | 0
Items measured on a non-recurring basis | Level 2 Inputs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity investments | 0 |  | 0
Items measured on a non-recurring basis | Level 2 Inputs | Loans measured for impairment based on the fair value of the underlying collateral |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans measured for impairment based on the fair value of the underlying collateral | 0 |  | 0
Items measured on a non-recurring basis | Level 3 Inputs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity investments | 44,738,000 |  | 43,576,000
Items measured on a non-recurring basis | Level 3 Inputs | Loans measured for impairment based on the fair value of the underlying collateral |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans measured for impairment based on the fair value of the underlying collateral | 22,206,000 |  | 18,509,000
Items measured on a non-recurring basis | Fair Value Measured at Net Asset Value Per Share |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity investments | 44,700,000 |  | 43,600,000
Unrealized gain (loss) | $ 0 |  | $ 0

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