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Loans - Recorded Investment in Loans and Allowance for Credit Losses by Loss Estimation Methodology (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	$ 5,231,331,000	$ 5,707,762,000
Loans, allowance for credit losses	64,586,000	86,670,000	$ 37,520,000	$ 34,203,000
Loans at fair value	0	17,011,000
Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	5,204,478,000	5,679,234,000
Loan balance collectively evaluated	53,311,000	78,429,000
Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	16,865,000	10,955,000
Loan balance individually evaluated	6,701,000	2,360,000
Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	9,988,000	17,573,000
Loan balance individually evaluated	4,574,000	5,881,000
Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	3,133,334,000	2,787,908,000
Real estate | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,693,512,000	1,370,928,000
Loans, allowance for credit losses	13,425,000	15,430,000	10,013,000	8,999,000
Loans at fair value	0	17,000,000
Real estate | Commercial real estate | Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	1,691,269,000	1,365,284,000
Loan balance collectively evaluated	13,416,000	14,896,000
Real estate | Commercial real estate | Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	166,000	3,173,000
Loan balance individually evaluated	0	525,000
Real estate | Commercial real estate | Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	2,077,000	2,471,000
Loan balance individually evaluated	9,000	9,000
Real estate | Construction/land/land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	530,083,000	531,860,000
Loans, allowance for credit losses	4,011,000	8,191,000	3,711,000	3,331,000
Real estate | Construction/land/land development | Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	529,789,000	528,894,000
Loan balance collectively evaluated	3,997,000	8,062,000
Real estate | Construction/land/land development | Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	0	2,621,000
Loan balance individually evaluated	0	128,000
Real estate | Construction/land/land development | Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	294,000	345,000
Loan balance individually evaluated	14,000	1,000
Real estate | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	909,739,000	885,120,000
Loans, allowance for credit losses	6,116,000	9,418,000	6,332,000	5,705,000
Real estate | Residential real estate | Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	898,456,000	879,015,000
Loan balance collectively evaluated	5,017,000	8,983,000
Real estate | Residential real estate | Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	8,150,000	2,009,000
Loan balance individually evaluated	19,000	0
Real estate | Residential real estate | Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	3,133,000	4,096,000
Loan balance individually evaluated	1,080,000	435,000
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,454,235,000	1,817,862,000
Loans, allowance for credit losses	40,146,000	51,857,000	16,960,000	15,616,000
Commercial and industrial | Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	1,441,204,000	1,804,049,000
Loan balance collectively evaluated	29,995,000	44,714,000
Commercial and industrial | Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	8,547,000	3,152,000
Loan balance individually evaluated	6,680,000	1,707,000
Commercial and industrial | Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	4,484,000	10,661,000
Loan balance individually evaluated	3,471,000	5,436,000
Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	627,078,000	1,084,001,000
Loans, allowance for credit losses	340,000	856,000	262,000	316,000
Mortgage warehouse lines of credit | Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	627,078,000	1,084,001,000
Loan balance collectively evaluated	340,000	856,000
Mortgage warehouse lines of credit | Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	0	0
Loan balance individually evaluated	0	0
Mortgage warehouse lines of credit | Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	0	0
Loan balance individually evaluated	0	0
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	16,684,000	17,991,000
Loans, allowance for credit losses	548,000	918,000	$ 242,000	$ 236,000
Consumer | Probability of Default
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated, probability of default	16,682,000	17,991,000
Loan balance collectively evaluated	546,000	918,000
Consumer | Fair Value of Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	2,000	0
Loan balance individually evaluated	2,000	0
Consumer | Discounted Cash Flow
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance individually evaluated	0	0
Loan balance individually evaluated	$ 0	$ 0

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Financing Receivable Excluding Loans At Fair Value, Before Allowance for Credit Loss

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Amount excluding accrued interest, of allowance for credit loss on financing receivable.

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