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Loan and Lease Receivables - Summary of Balances for Each Respective Loan and Lease Category (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019
--- | --- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | $ 4,374,517 | $ 3,785,661 | $ 3,831,090
Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 3,636,579 | 2,835,652 |
Acquired Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 216,818 | 258,668 |
Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 521,120 | 691,341 |
Commercial Real Estate |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 1,347,855 | 1,276,542 | 1,306,288
Commercial Real Estate | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 919,862 | 792,263 |
Commercial Real Estate | Acquired Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 117,114 | 135,914 |
Commercial Real Estate | Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 310,879 | 348,365 |
Residential Real Estate |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 633,396 | 711,822 | 749,103
Residential Real Estate | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 458,364 | 483,072 |
Residential Real Estate | Acquired Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 84,197 | 100,223 |
Residential Real Estate | Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 90,835 | 128,527 |
Construction, Land Development, and Other Land |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 239,034 | 278,657 | 280,999
Construction, Land Development, and Other Land | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 234,017 | 235,794 |
Construction, Land Development, and Other Land | Acquired Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 4,804 | 5,373 |
Construction, Land Development, and Other Land | Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 213 | 37,490 |
Commercial and Industrial |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 1,328,809 | 1,331,565 | 1,302,162
Commercial and Industrial | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 1,214,099 | 1,160,996 |
Commercial and Industrial | Acquired Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 10,489 | 16,909 |
Commercial and Industrial | Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 104,221 | 153,660 |
Paycheck Protection Program ("PPP") |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 622,191 |  |
Paycheck Protection Program ("PPP") | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 622,191 |  |
Installment and Other |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 3,143 | 6,565 | 9,354
Installment and Other | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 2,346 | 5,372 |
Installment and Other | Acquired Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 214 | 249 |
Installment and Other | Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 583 | 944 |
Lease Financing Receivables |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 200,089 | 180,510 | $ 183,184
Lease Financing Receivables | Originated |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | 185,700 | 158,155 |
Lease Financing Receivables | Acquired Non-Impaired |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans and leases | $ 14,389 | $ 22,355 |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
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