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Loans - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans | $ 4,826,338 |  | $ 4,826,338 |  | $ 4,307,366
Loan balance, before allowance for credit loss and fee | 4,875,675 |  | 4,875,675 |  | 4,351,725
Loans, including fees | 58,039 | $ 56,999 | 172,706 | $ 166,888 |
Loan fees | (28,570) |  | (28,570) |  | (35,432)
Deferred loan fees | 20,767 |  | 20,767 |  | 8,927
Commercial and industrial |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans | 633,897 |  | 633,897 |  | $ 249,791
Payment Protection Program (PPP) |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan balance, before allowance for credit loss and fee | 438,510 |  | 438,510 |  |
Payment Protection Program (PPP) | Commercial and industrial |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans | $ 437,793 |  | $ 437,793 |  |
Number of loans (in loans) | loan | 2,900 |  | 2,900 |  |
Loans, including fees | $ 2,603 |  | $ 4,959 |  |
Deferred loan fees | 15,735 |  | 15,735 |  |
Deferred loan costs | 763 |  | 763 |  |
Deferred fee accretion |  |  | 11,846 |  |
Allowance for credit loss, balance less than $50,000 | $ 32,296 |  | $ 32,296 |  |
Number of loans less than $50,000 (in loans) | loan | 1,420 |  | 1,420 |  |

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