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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Allowance for Loan and Lease Losses and Corresponding Loan and Lease Balances (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | $ 61,719 | $ 51,300 | $ 66,347 | $ 31,936 |
Provisions (recapture) | 352 | 15,740 | 2,750 | 45,713 |
Charge-offs | 2,484 | 6,145 | 10,366 | 17,615 |
Recoveries | 1,011 | 363 | 1,867 | 1,224 |
Ending balance | 60,598 | 61,258 | 60,598 | 61,258 |
Individually evaluated for impairment | 24,562 | 14,782 | 24,562 | 14,782 |
Collectively evaluated for impairment | 31,761 | 41,445 | 31,761 | 41,445 |
Allowance for loan and lease losses | 60,598 | 61,258 | 60,598 | 61,258 | $ 66,347
Individually evaluated for impairment | 87,198 | 77,890 | 87,198 | 77,890 |
Collectively evaluated for impairment | 4,366,750 | 4,079,809 | 4,366,750 | 4,079,809 |
Total loans and leases | 4,609,228 | 4,374,517 | 4,609,228 | 4,374,517 | 4,340,535
Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 4,275 | 5,031 | 4,275 | 5,031 |
Loans acquired with deteriorated credit quality | 155,280 | 216,818 | 155,280 | 216,818 |
Commercial Real Estate |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 19,541 | 14,110 | 19,584 | 7,965 |
Provisions (recapture) | (1,108) | 6,421 | 2,891 | 14,149 |
Charge-offs | 564 | 1,566 | 2,644 | 3,206 |
Recoveries | 287 | 19 | 541 | 76 |
Ending balance | 20,372 | 18,984 | 20,372 | 18,984 |
Individually evaluated for impairment | 8,420 | 4,516 | 8,420 | 4,516 |
Collectively evaluated for impairment | 9,314 | 11,825 | 9,314 | 11,825 |
Allowance for loan and lease losses | 20,372 | 18,984 | 20,372 | 18,984 | 19,584
Individually evaluated for impairment | 45,563 | 39,001 | 45,563 | 39,001 |
Collectively evaluated for impairment | 1,487,994 | 1,191,740 | 1,487,994 | 1,191,740 |
Total loans and leases | 1,618,378 | 1,347,855 | 1,618,378 | 1,347,855 | 1,421,670
Commercial Real Estate | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 2,638 | 2,643 | 2,638 | 2,643 |
Loans acquired with deteriorated credit quality | 84,821 | 117,114 | 84,821 | 117,114 |
Residential Real Estate |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,364 | 3,741 | 2,400 | 1,990 |
Provisions (recapture) | (225) | 291 | (1,257) | 2,031 |
Charge-offs | (65) | 250 | 76 | 259 |
Recoveries | 2 | 8 | 9 | 28 |
Ending balance | 1,076 | 3,790 | 1,076 | 3,790 |
Individually evaluated for impairment | 0 | 77 | 0 | 77 |
Collectively evaluated for impairment | 723 | 3,413 | 723 | 3,413 |
Allowance for loan and lease losses | 1,076 | 3,790 | 1,076 | 3,790 | 2,400
Individually evaluated for impairment | 3,946 | 1,636 | 3,946 | 1,636 |
Collectively evaluated for impairment | 441,915 | 547,563 | 441,915 | 547,563 |
Total loans and leases | 507,754 | 633,396 | 507,754 | 633,396 | 572,271
Residential Real Estate | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 353 | 300 | 353 | 300 |
Loans acquired with deteriorated credit quality | 61,893 | 84,197 | 61,893 | 84,197 |
Construction, Land Development, and Other Land |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 619 | 1,491 | 1,352 | 610 |
Provisions (recapture) | (61) | 1,029 | (468) | 1,910 |
Charge-offs | 0 | (701) | 326 | (701) |
Recoveries | 0 | 53 | 0 | 53 |
Ending balance | 558 | 1,872 | 558 | 1,872 |
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 550 | 1,685 | 550 | 1,685 |
Allowance for loan and lease losses | 558 | 1,872 | 558 | 1,872 | 1,352
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 336,666 | 234,230 | 336,666 | 234,230 |
Total loans and leases | 338,412 | 239,034 | 338,412 | 239,034 | 230,733
Construction, Land Development, and Other Land | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 8 | 187 | 8 | 187 |
Loans acquired with deteriorated credit quality | 1,746 | 4,804 | 1,746 | 4,804 |
Commercial and Industrial |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 38,284 | 30,108 | 41,183 | 19,377 |
Provisions (recapture) | (1,218) | 7,603 | 226 | 26,844 |
Charge-offs | 1,456 | 3,254 | 6,172 | 12,057 |
Recoveries | 380 | 83 | 753 | 376 |
Ending balance | 35,990 | 34,540 | 35,990 | 34,540 |
Individually evaluated for impairment | 16,142 | 10,189 | 16,142 | 10,189 |
Collectively evaluated for impairment | 18,572 | 22,450 | 18,572 | 22,450 |
Allowance for loan and lease losses | 35,990 | 34,540 | 35,990 | 34,540 | 41,183
Individually evaluated for impairment | 37,689 | 37,253 | 37,689 | 37,253 |
Collectively evaluated for impairment | 1,492,065 | 1,281,067 | 1,492,065 | 1,281,067 |
Total loans and leases | 1,536,405 | 1,328,809 | 1,536,405 | 1,328,809 | 1,368,900
Commercial and Industrial | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 1,276 | 1,901 | 1,276 | 1,901 |
Loans acquired with deteriorated credit quality | 6,651 | 10,489 | 6,651 | 10,489 |
Paycheck Protection Program |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |
Provisions (recapture) | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Ending balance | 0 | 0 | 0 | 0 |
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 0 | 0 | 0 | 0 |
Allowance for loan and lease losses | 0 | 0 | 0 | 0 | 0
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 268,081 | 622,191 | 268,081 | 622,191 |
Total loans and leases | 268,081 | 622,191 | 268,081 | 622,191 | 517,815
Paycheck Protection Program | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 0 | 0 | 0 | 0 |
Loans acquired with deteriorated credit quality | 0 | 0 | 0 | 0 |
Installment and Other |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 9 | 36 | 15 | 50 |
Provisions (recapture) | (2) | (1) | (8) | (13) |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Ending balance | 7 | 37 | 7 | 37 |
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 7 | 37 | 7 | 37 |
Allowance for loan and lease losses | 7 | 37 | 7 | 37 | 15
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 1,273 | 2,929 | 1,273 | 2,929 |
Total loans and leases | 1,442 | 3,143 | 1,442 | 3,143 | 2,005
Installment and Other | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 0 | 0 | 0 | 0 |
Loans acquired with deteriorated credit quality | 169 | 214 | 169 | 214 |
Lease Financing Receivables |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,902 | 1,814 | 1,813 | 1,944 |
Provisions (recapture) | 750 | 395 | 1,366 | 792 |
Charge-offs | 399 | 374 | 1,148 | 1,392 |
Recoveries | 342 | 200 | 564 | 691 |
Ending balance | 2,595 | 2,035 | 2,595 | 2,035 |
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 2,595 | 2,035 | 2,595 | 2,035 |
Allowance for loan and lease losses | 2,595 | 2,035 | 2,595 | 2,035 | 1,813
Individually evaluated for impairment | 0 | 0 | 0 | 0 |
Collectively evaluated for impairment | 338,756 | 200,089 | 338,756 | 200,089 |
Total loans and leases | 338,756 | 200,089 | 338,756 | 200,089 | $ 227,141
Lease Financing Receivables | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans acquired with deteriorated credit quality | 0 | 0 | 0 | 0 |
Loans acquired with deteriorated credit quality | $ 0 | $ 0 | $ 0 | $ 0 |

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