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Business Combinations - Assets and Liabilities Assumed (Details) - USD ($) $ in Thousands | May 01, 2019 | Apr. 02, 2019 | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill recorded for First South Bancorp |  |  | $ 296,764 | $ 236,347
First South Bancorp |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price | $ 37,486 |  |  |
Cash and due from banks | 4,633 |  |  |
Overnight investments | 3,188 |  |  |
Investment securities | 23,512 |  |  |
Loans | 179,243 |  |  |
Premises and equipment | 4,944 |  |  |
Other real estate owned | 1,567 |  |  |
Income earned not collected | 604 |  |  |
Intangible assets | 2,268 |  |  |
Other assets | 19,192 |  |  |
Total assets acquired | 239,151 |  |  |
Deposits | 207,556 |  |  |
Borrowings | 5,155 |  |  |
Other liabilities | 2,850 |  |  |
Total liabilities assumed | 215,561 |  |  |
Fair value of net assets acquired | 23,590 |  |  |
Goodwill recorded for First South Bancorp | $ 13,896 |  |  |
Biscayne Bancshares |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price |  | $ 118,949 |  |
Cash and due from banks |  | 78,010 |  |
Overnight investments |  | 306 |  |
Investment securities |  | 34,539 |  |
Loans |  | 863,384 |  |
Premises and equipment |  | 1,533 |  |
Other real estate owned |  | 2,046 |  |
Income earned not collected |  | 3,049 |  |
Intangible assets |  | 4,745 |  |
Other assets |  | 41,572 |  |
Total assets acquired |  | 1,029,184 |  |
Deposits |  | 786,512 |  |
Borrowings |  | 157,415 |  |
Other liabilities |  | 12,829 |  |
Total liabilities assumed |  | 956,756 |  |
Fair value of net assets acquired |  | 72,428 |  |
Goodwill recorded for First South Bancorp |  | $ 46,521 |  |

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