Fair Value of Financial Instruments - Analysis of Level 3 Valuation Techniques (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 1,511,145	$ 1,614,188
Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	664,335	705,853
Non-recurring Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	2,684	2,187
Non-recurring Fair Value | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	2,684	2,187
Municipal bonds | Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 94	$ 96
Municipal bonds | Discounted Expected Cash Flows | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Municipal bond, measurement input	0.053	0.048
Municipal bonds | Discounted Expected Cash Flows | Prepayment speed | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Municipal bond, measurement input	0.050	0.050
Loans held for sale | Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 25,056	$ 25,310
Loans held for sale | Minimum | Discounted Expected Cash Flows | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.063	0.062
Loans held for sale | Maximum | Discounted Expected Cash Flows | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.208	0.219
Loans held for sale | Weighted Average | Discounted Expected Cash Flows | Prepayment speed | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.172	0.174
Loans held for investment | Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 600,571	$ 645,201
Loans held for investment | Minimum | Discounted Expected Cash Flows | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.063	0.062
Loans held for investment | Minimum | Discounted Expected Cash Flows | Loss rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0	0.000
Loans held for investment | Minimum | Discounted appraisals | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.100	0.100
Loans held for investment | Maximum | Discounted Expected Cash Flows | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.208	0.219
Loans held for investment | Maximum | Discounted Expected Cash Flows | Loss rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.702	0.702
Loans held for investment | Maximum | Discounted appraisals | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.810	0.850
Loans held for investment | Weighted Average | Discounted Expected Cash Flows | Prepayment speed | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.172	0.174
Loans held for investment | Weighted Average | Discounted Expected Cash Flows | Loss rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.016	0.015
Equity Warrant Assets | Recurring | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 2,328	$ 1,672
Equity Warrant Assets | Black-Scholes Option Pricing Model | Discount rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.200	0.200
Equity Warrant Assets | Black-Scholes Option Pricing Model | Risk-Free Interest Rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.025
Equity Warrant Assets | Minimum | Black-Scholes Option Pricing Model | Expected Volatility Rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.266	0.262
Equity Warrant Assets | Minimum | Black-Scholes Option Pricing Model | Risk-Free Interest Rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input		0.013
Equity Warrant Assets | Minimum | Black-Scholes Option Pricing Model | Expected Term | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	3 years	4 years
Equity Warrant Assets | Maximum | Black-Scholes Option Pricing Model | Expected Volatility Rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.880	0.882
Equity Warrant Assets | Maximum | Black-Scholes Option Pricing Model | Risk-Free Interest Rate | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input		0.015
Equity Warrant Assets | Maximum | Black-Scholes Option Pricing Model | Expected Term | Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	10 years	10 years
Collateral dependent loans | Non-recurring Fair Value | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 2,486	$ 1,567
Collateral dependent loans | Minimum | Discounted appraisals | Discount rate | Non-recurring Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.100	0.100
Collateral dependent loans | Maximum | Discounted appraisals | Discount rate | Non-recurring Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.990	0.990
Foreclosed assets | Non-recurring Fair Value | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Asset, fair value	$ 198	$ 620
Foreclosed assets | Discounted appraisals | Discount rate | Non-recurring Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input	0.100
Foreclosed assets | Minimum | Discounted appraisals | Discount rate | Non-recurring Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input		0.090
Foreclosed assets | Maximum | Discounted appraisals | Discount rate | Non-recurring Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Measurement input		0.100