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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Risk Rating Categories of Loans and Leases Considered for Inclusion in Allowance for Loan and Lease Losses Calculation (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | $ 3,785,661 | $ 3,501,626 | $ 2,277,492
Commercial Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,276,542 | 1,261,607 | 891,693
Residential Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 711,822 | 704,902 | 577,218
Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 278,657 | 185,349 | 105,429
Commercial and Industrial |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,331,565 | 1,144,797 | 521,238
Installment and Other |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 6,565 | 13,718 | 4,228
Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 180,510 | 191,253 | $ 177,686
Loans Excluding Acquired Impaired Loans |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 3,526,993 | 3,224,084 |
Loans Excluding Acquired Impaired Loans | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,140,628 | 1,114,799 |
Loans Excluding Acquired Impaired Loans | Residential Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 611,599 | 590,968 |
Loans Excluding Acquired Impaired Loans | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 273,284 | 181,570 |
Loans Excluding Acquired Impaired Loans | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,314,656 | 1,132,180 |
Loans Excluding Acquired Impaired Loans | Installment and Other |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 6,316 | 13,314 |
Loans Excluding Acquired Impaired Loans | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 180,510 | 191,253 |
Loans Excluding Acquired Impaired Loans | Pass |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 3,088,584 | 2,870,431 |
Loans Excluding Acquired Impaired Loans | Pass | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 984,881 | 1,009,041 |
Loans Excluding Acquired Impaired Loans | Pass | Residential Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 584,363 | 553,665 |
Loans Excluding Acquired Impaired Loans | Pass | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 247,775 | 147,123 |
Loans Excluding Acquired Impaired Loans | Pass | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,087,856 | 962,291 |
Loans Excluding Acquired Impaired Loans | Pass | Installment and Other |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 6,013 | 9,997 |
Loans Excluding Acquired Impaired Loans | Pass | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 177,696 | 188,314 |
Loans Excluding Acquired Impaired Loans | Watch |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 299,432 | 253,552 |
Loans Excluding Acquired Impaired Loans | Watch | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 99,803 | 76,276 |
Loans Excluding Acquired Impaired Loans | Watch | Residential Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 21,856 | 29,522 |
Loans Excluding Acquired Impaired Loans | Watch | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 18,181 | 31,376 |
Loans Excluding Acquired Impaired Loans | Watch | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 159,282 | 112,996 |
Loans Excluding Acquired Impaired Loans | Watch | Installment and Other |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 302 | 3,302 |
Loans Excluding Acquired Impaired Loans | Watch | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 8 | 80 |
Loans Excluding Acquired Impaired Loans | Special Mention |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 64,559 | 62,437 |
Loans Excluding Acquired Impaired Loans | Special Mention | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 27,484 | 17,602 |
Loans Excluding Acquired Impaired Loans | Special Mention | Residential Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 3,648 | 5,656 |
Loans Excluding Acquired Impaired Loans | Special Mention | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 4,684 | 3,071 |
Loans Excluding Acquired Impaired Loans | Special Mention | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 26,944 | 34,314 |
Loans Excluding Acquired Impaired Loans | Special Mention | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,799 | 1,794 |
Loans Excluding Acquired Impaired Loans | Substandard |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 74,139 | 37,417 |
Loans Excluding Acquired Impaired Loans | Substandard | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 28,460 | 11,880 |
Loans Excluding Acquired Impaired Loans | Substandard | Residential Real Estate |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1,732 | 2,125 |
Loans Excluding Acquired Impaired Loans | Substandard | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 2,644 |  |
Loans Excluding Acquired Impaired Loans | Substandard | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 40,574 | 22,579 |
Loans Excluding Acquired Impaired Loans | Substandard | Installment and Other |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 1 | 15 |
Loans Excluding Acquired Impaired Loans | Substandard | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 728 | 818 |
Loans Excluding Acquired Impaired Loans | Doubtful |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | 279 | 247 |
Loans Excluding Acquired Impaired Loans | Doubtful | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Total loans and leases | $ 279 | $ 247 |

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