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Fair Value Measurements - Schedule of Financial Assets and Financial Liabilities Measured at Fair Value (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Unrealized gain (loss) $ 1,452,000 $ 3,362,000 $ (446,000) $ (8,853,000)  
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 3,400,000   $ 3,400,000   $ 3,000,000
Items measured on a recurring basis          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Debt securities available-for-sale 453,208,000   453,208,000   457,648,000
Equity investments 50,945,000   50,945,000   61,942,000
Interest rate derivative asset 137,090,000   137,090,000   113,420,000
Interest rate derivative liability (138,806,000)   (138,806,000)   (113,473,000)
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 42,054,000   42,054,000   0
Equity investments 0   0   430,000
Interest rate derivative asset 0   0   0
Interest rate derivative liability 0   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 411,154,000   411,154,000   457,648,000
Equity investments 50,945,000   50,945,000   61,511,000
Interest rate derivative asset 137,090,000   137,090,000   113,420,000
Interest rate derivative liability (138,806,000)   (138,806,000)   (113,473,000)
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   0
Equity investments 0   0   0
Interest rate derivative asset 0   0   0
Interest rate derivative liability 0   0   0
Items measured on a non-recurring basis          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Equity investments 46,963,000   46,963,000   40,095,000
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 19,080,000   19,080,000   9,635,000
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   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   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   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   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 43,576,000   43,576,000   37,076,000
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 19,080,000   19,080,000   9,635,000
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 $ 43,600,000   43,600,000   37,100,000
Unrealized gain (loss)     $ 0   $ 20,000,000