Fair Value Measurement and Fair Value of Financial Instruments - Quantitative Information for Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Quantitative information
Derivative assets - Fair value	$ 765,161	$ 755,328
Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	765,161	755,328
Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	35,721	72,614
Level 3 | Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	263	323
Level 3 | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	35,721	72,614
Level 3 | Discounted cash flows | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	4,989	23,322
Level 3 | Fair value of collateral | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	17,501	17,912
Level 3 | Fair value of collateral | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	6,134
Level 3 | Individual analysis of each investment | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	868
Level 3 | Fair value of property | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	$ 7,097	$ 31,380
Discount | Level 3 | Discounted cash flows | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, measurement input	15.00%
Discount | Level 3 | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Minimum
Quantitative information
Loans held-for-investment, measurement input		4.00%
Discount | Level 3 | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Maximum
Quantitative information
Loans held-for-investment, measurement input		6.00%
Discount | Level 3 | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	15.00%	4.00%
Discount | Level 3 | Fair value of collateral | Fair Value, Measurements, Nonrecurring | Minimum
Quantitative information
Loans held-for-investment, measurement input	15.00%	15.00%
Discount | Level 3 | Fair value of collateral | Fair Value, Measurements, Nonrecurring | Maximum
Quantitative information
Loans held-for-investment, measurement input	81.00%	75.00%
Discount | Level 3 | Fair value of collateral | Fair Value, Measurements, Nonrecurring | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	43.00%	37.00%
Selling cost | Level 3 | Fair value of property | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, measurement input	8.00%	8.00%
Selling cost | Level 3 | Fair value of property | Fair Value, Measurements, Nonrecurring | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	8.00%	8.00%
Equity contracts | Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	$ 263	$ 323
Equity contracts | Level 3 | Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	$ 263	$ 323
Equity contracts | Equity volatility | Level 3 | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Minimum
Quantitative information
Measurement input	41.00%	42.00%
Equity contracts | Equity volatility | Level 3 | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Maximum
Quantitative information
Measurement input	50.00%	60.00%
Equity contracts | Equity volatility | Level 3 | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Weighted Average
Quantitative information
Measurement input	44.00%	54.00%
Equity contracts | Liquidity discount | Level 3 | Fair Value, Measurements, Recurring
Quantitative information
Measurement input	47.00%	47.00%
Equity contracts | Liquidity discount | Level 3 | Fair Value, Measurements, Recurring | Weighted Average
Quantitative information
Measurement input	47.00%	47.00%