Fair Value Measurement and Fair Value of Financial Instruments (Quantitative Information for Significant Unobservable Inputs) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Quantitative information
Derivative assets - Fair value	$ 689,100	$ 484,184
Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	689,100	484,184
Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	103,637	126,984
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	309	215
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	103,637	126,984
Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	44,881	64,919
Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	34,570	38,537
Significant Unobservable Inputs (Level 3) | Fair value of property, selling cost | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, fair value disclosure	$ 24,186	$ 23,528
Discount | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Minimum
Quantitative information
Loans held-for-investment, measurement input	4.00%	4.00%
Discount | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Maximum
Quantitative information
Loans held-for-investment, measurement input	6.00%	15.00%
Discount | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	4.00%	7.00%
Discount | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring | Minimum
Quantitative information
Loans held-for-investment, measurement input	15.00%	15.00%
Discount | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring | Maximum
Quantitative information
Loans held-for-investment, measurement input	77.00%	75.00%
Discount | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	30.00%	41.00%
Selling cost | Significant Unobservable Inputs (Level 3) | Fair value of property, selling cost | Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, measurement input	8.00%	8.00%
Selling cost | Significant Unobservable Inputs (Level 3) | Fair value of property, selling cost | 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	$ 314	$ 220
Equity contracts | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	$ 309	$ 215
Equity contracts | Equity volatility | Significant Unobservable Inputs (Level 3) | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Minimum
Quantitative information
Measurement input	41.00%	44.00%
Equity contracts | Equity volatility | Significant Unobservable Inputs (Level 3) | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Maximum
Quantitative information
Measurement input	57.00%	54.00%
Equity contracts | Equity volatility | Significant Unobservable Inputs (Level 3) | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Weighted Average
Quantitative information
Measurement input	48.00%	49.00%
Equity contracts | Liquidity discount | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Quantitative information
Measurement input	47.00%	47.00%
Equity contracts | Liquidity discount | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Weighted Average
Quantitative information
Measurement input	47.00%	47.00%