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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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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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