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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Contractual Delinquency Information (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | --- | ---
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | $ 4,609,228 | $ 4,340,535 | $ 4,374,517
Commercial Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 1,618,378 | 1,421,670 | 1,347,855
Residential Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 507,754 | 572,271 | 633,396
Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 338,412 | 230,733 | 239,034
Commercial and Industrial |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 1,536,405 | 1,368,900 | 1,328,809
Paycheck Protection Program |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 268,081 | 517,815 | 622,191
Installment and Other |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 1,442 | 2,005 | 3,143
Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 338,756 | 227,141 | $ 200,089
Acquired Non-Impaired and Originated Loans |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 42,700 | 55,716 |
Non-accrual | 34,465 | 41,103 |
Current | 4,411,248 | 4,083,002 |
Total loans and leases | 4,453,948 | 4,138,718 |
Acquired Non-Impaired and Originated Loans | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 6,117 | 8,753 |
Acquired Non-Impaired and Originated Loans | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 2,118 | 5,860 |
Acquired Non-Impaired and Originated Loans | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 18,838 | 21,707 |
Non-accrual | 17,082 | 15,969 |
Current | 1,514,719 | 1,291,479 |
Total loans and leases | 1,533,557 | 1,313,186 |
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 330 | 1,544 |
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 1,426 | 4,194 |
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Residential Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 3,214 | 3,615 |
Non-accrual | 2,127 | 1,929 |
Current | 442,647 | 489,816 |
Total loans and leases | 445,861 | 493,431 |
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 1,087 | 1,686 |
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 |  |
Acquired Non-Impaired and Originated Loans | Residential Real Estate | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 2,035 | 0 |
Non-accrual | 0 | 0 |
Current | 334,631 | 226,620 |
Total loans and leases | 336,666 | 226,620 |
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 2,035 | 0 |
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 16,519 | 27,747 |
Non-accrual | 14,272 | 21,936 |
Current | 1,513,235 | 1,330,975 |
Total loans and leases | 1,529,754 | 1,358,722 |
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 1,653 | 4,521 |
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 594 | 1,290 |
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Paycheck Protection Program |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 |  |
Non-accrual | 0 |  |
Current | 268,081 | 517,815 |
Total loans and leases | 268,081 | 517,815 |
Acquired Non-Impaired and Originated Loans | Paycheck Protection Program | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 |  |
Acquired Non-Impaired and Originated Loans | Paycheck Protection Program | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 |  |
Acquired Non-Impaired and Originated Loans | Paycheck Protection Program | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 |  |
Acquired Non-Impaired and Originated Loans | Installment and Other |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 39 | 7 |
Non-accrual | 0 | 1 |
Current | 1,234 | 1,796 |
Total loans and leases | 1,273 | 1,803 |
Acquired Non-Impaired and Originated Loans | Installment and Other | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 39 | 6 |
Acquired Non-Impaired and Originated Loans | Installment and Other | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Installment and Other | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 2,055 | 2,640 |
Non-accrual | 984 | 1,268 |
Current | 336,701 | 224,501 |
Total loans and leases | 338,756 | 227,141 |
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 973 | 996 |
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 98 | 376 |
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | Greater than 90 Days and Accruing |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | $ 0 | $ 0 |

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