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Subsequent Event (Details) - USD ($) $ in Thousands, shares in Millions | Jul. 01, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018
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Subsequent Event [Line Items] |  |  |  |
Assets |  | $ 3,970,739 |  | $ 3,929,090
Citizens First |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Assets |  |  | $ 472,100 |
Loans |  |  | 377,900 |
Deposits |  |  | $ 381,800 |
Subsequent Event | Citizens First |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Shares of common stock issued for acquisition (in shares) | 1.7 |  |  |
Total stock consideration paid | $ 50,100 |  |  |
Cash consideration paid | $ 15,500 |  |  |

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