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General (Details) - USD ($) $ in Thousands | Jan. 01, 2020 | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Loans |  | $ 9,298,541 | $ 8,459,310
Estimated | One-time cumulative-effect adjustment |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Life of loan portfolio | 4 years |  |
Reserve for potential losses from unfunded commitments | $ 18,000 |  |
Estimated | One-time cumulative-effect adjustment | Minimum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase in allowance | 55.00% |  |
Estimated | One-time cumulative-effect adjustment | Maximum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase in allowance | 65.00% |  |
Payment deferrals, fee waivers, extensions of repayment terms, or other |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Loans |  | $ 1,100,000 |
Percent of loan portfolio modified |  | 12.10% |

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