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v3.19.1

Subsequent Event (Details) $ in Thousands | Apr. 01, 2019 USD ($) branch shares | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
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Subsequent Event [Line Items] |  |  |
Payments to Acquire Businesses, Gross | $ 167,400 |  |
Assets |  | $ 8,997,457 | $ 8,851,592
Business Combination, Cost of Acquired Entity, Purchase Price | $ 667,100 |  |
Business Combination, Increase in Acquirer Outstanding Shares | shares | 6,166,010 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Net | $ 2,100,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investments | 196,900 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | 1,900,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Borrowings | $ 124,800 |  |
Number of Branches | branch | 11 |  |

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