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Loans and Loans Held for Sale - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) SecurityLoan loan | Jun. 30, 2021 USD ($) SecurityLoan loan | Jun. 30, 2022 USD ($) SecurityLoan loan | Jun. 30, 2021 USD ($) SecurityLoan loan | Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Unearned income | $ 8,500 |  | $ 8,500 |  | $ 14,100
Purchase accounting fair value adjustments | 5,300 |  | 5,300 |  | 6,700
Total loans | 6,942,799 |  | 6,942,799 |  | 6,901,414
Loans held for investment, outstanding balance | $ 7,040,894 |  | $ 7,040,894 |  | 6,999,990
Threshold period of satisfactory performance for troubled debt restructuring to be restored to accruing status |  |  | 6 months |  |
Number of troubled debt restructuring loans returned to accruing status | SecurityLoan | 0 | 4 | 0 | 5 |
Financing receivable troubled debt restructuring returned to accruing status |  | $ 500 |  | $ 500 |
Number of commitments to lend additional funds on TDRs | SecurityLoan | 13 | 14 | 13 | 14 |
Commitments to lend additional funds on TDRs | $ 300 | $ 700 | $ 300 | $ 700 |
Minimum period of loan payment defaults following restructure for TDRs to be in default |  |  | 90 days |  |
Number of defaulted TDRs that were restructured within the last twelve months prior to defaulting | loan | 0 | 0 | 1 | 0 |
Amount of defaulted TDRs that were restructured within the last twelve months prior to defaulting |  |  | $ 100 |  |
Commercial Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | $ 5,297,126 |  | $ 5,297,126 |  | $ 5,406,584
Percentage of commercial loans in total portfolio loans | 75.20% |  | 75.20% |  | 77.20%
Commercial Loans | CARES Act, Paycheck Protection Program Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | $ 11,700 |  | $ 11,700 |  | $ 88,300
Business banking portfolio |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 1,200,000 |  | 1,200,000 |  | 1,100,000
Consumer Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 1,743,768 |  | 1,743,768 |  | 1,593,406
Commercial real estate | Commercial Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 2,626,004 |  | 2,626,004 |  | 2,690,528
Commercial real estate | Business banking portfolio |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 565,700 |  | 565,700 |  | 546,100
Commercial and industrial | Commercial Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 1,479,586 |  | 1,479,586 |  | 1,513,523
Commercial and industrial | Business banking portfolio |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 217,900 |  | 217,900 |  | 215,400
Commercial and industrial | Business banking portfolio | CARES Act, Paycheck Protection Program Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 11,700 |  | 11,700 |  | 39,700
Commercial construction | Commercial Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 395,335 |  | 395,335 |  | 424,755
Commercial construction | Business banking portfolio |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 15,100 |  | 15,100 |  | 16,200
Consumer real estate | Business banking portfolio |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 364,600 |  | 364,600 |  |
Consumer real estate | Consumer Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 1,259,252 |  | 1,259,252 |  | 1,127,585
Business banking | Commercial Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | 1,160,790 |  | 1,160,790 |  | 1,135,693
Business banking | Consumer Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance |  |  |  |  | 357,900
CRE and commercial construction | Commercial Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans held for investment, outstanding balance | $ 3,600,000 |  | $ 3,600,000 |  | $ 3,700,000
Combined percentage of commercial real estate and commercial construction in total commercial loans | 68.00% |  | 68.00% |  | 68.00%
Combined percentage of commercial real estate and commercial construction in total portfolio loans | 51.20% |  | 51.20% |  | 52.50%
Out of market exposure of combined portfolio | 6.40% |  | 6.40% |  | 5.70%
Percentage of total loans out-of-state excluding contiguous states | 3.30% |  | 3.30% |  | 3.00%

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