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Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Contractual Delinquency Information (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | $ 3,785,661 | $ 3,501,626 | $ 2,277,492
Commercial Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 1,276,542 | 1,261,607 | 891,693
Residential Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 711,822 | 704,902 | 577,218
Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 278,657 | 185,349 | 105,429
Commercial and Industrial |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 1,331,565 | 1,144,797 | 521,238
Installment and Other |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 6,565 | 13,718 | 4,228
Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total loans and leases | 180,510 | 191,253 | $ 177,686
Acquired Non-Impaired and Originated Loans |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 76,436 | 50,297 |
Non-accrual | 36,272 | 25,834 |
Current | 3,450,557 | 3,173,787 |
Total loans and leases | 3,526,993 | 3,224,084 |
Acquired Non-Impaired and Originated Loans | 30-59 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 25,963 | 19,697 |
Acquired Non-Impaired and Originated Loans | 60-89 Days Past Due |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 14,201 | 4,766 |
Acquired Non-Impaired and Originated Loans | Commercial Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 31,696 | 18,288 |
Non-accrual | 12,274 | 9,484 |
Current | 1,108,932 | 1,096,511 |
Total loans and leases | 1,140,628 | 1,114,799 |
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 | 14,269 | 6,659 |
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 | 5,153 | 2,145 |
Acquired Non-Impaired and Originated Loans | Residential Real Estate |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 5,018 | 7,014 |
Non-accrual | 1,371 | 1,815 |
Current | 606,581 | 583,954 |
Total loans and leases | 611,599 | 590,968 |
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 | 3,187 | 4,488 |
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 | 460 | 711 |
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 4,460 |  |
Current | 268,824 | 181,570 |
Total loans and leases | 273,284 | 181,570 |
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 | 4,460 |  |
Acquired Non-Impaired and Originated Loans | Commercial and Industrial |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 33,534 | 21,137 |
Non-accrual | 22,151 | 13,932 |
Current | 1,281,122 | 1,111,043 |
Total loans and leases | 1,314,656 | 1,132,180 |
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 | 7,789 | 5,829 |
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 | 3,594 | 1,376 |
Acquired Non-Impaired and Originated Loans | Installment and Other |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 136 | 1,948 |
Non-accrual | 1 | 12 |
Current | 6,180 | 11,366 |
Total loans and leases | 6,316 | 13,314 |
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 | 133 | 1,932 |
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 | 2 | 4 |
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Total Past Due | 1,592 | 1,910 |
Non-accrual | 475 | 591 |
Current | 178,918 | 189,343 |
Total loans and leases | 180,510 | 191,253 |
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 | 585 | 789 |
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 | $ 532 | $ 530 |

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