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Mergers and acquisitions - Atlantic Capital Bank Narrative (Details) - Atlantic Capital Bank $ in Thousands | Apr. 05, 2019 USD ($) branch
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Business Acquisition [Line Items] |
Total purchase price | $ 36,790
Customer deposits | $ 588,877
Deposit premium percentage | 6.25%
Loans held for investment, net of fair value adjustments | $ 374,966
Percentage of loans outstanding | 99.32%
Tennessee |
Business Acquisition [Line Items] |
Number of branches acquired | branch | 11
Georgia |
Business Acquisition [Line Items] |
Number of branches acquired | branch | 3

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