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Business Combinations - Preliminary Purchase Price Allocation (Details) - USD ($) $ in Thousands | Nov. 01, 2018 | Oct. 02, 2018 | May 01, 2018 | Dec. 18, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | --- | --- | --- | ---
Liabilities |  |  |  |  |  |  |
Goodwill recorded for Palmetto Heritage |  |  |  |  | $ 236,347 | $ 150,601 | $ 150,601
Palmetto Heritage Bancshares |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase Price | $ 30,426 |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash and due from banks | 6,418 |  |  |  |  |  |
Investment securities | 4,549 |  |  |  |  |  |
Loans | 135,146 |  |  |  |  |  |
Premises and equipment | 5,369 |  |  |  |  |  |
Other real estate owned | 2,319 |  |  |  |  |  |
Income earned not collected | 531 |  |  |  |  |  |
Intangible assets | 1,706 |  |  |  |  |  |
Other assets | 6,210 |  |  |  |  |  |
Fair value of assets acquired | 162,248 |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Deposits | 124,892 |  |  |  |  |  |
Accrued interest payable | 177 |  |  |  |  |  |
Borrowings | 24,000 |  |  |  |  |  |
Other liabilities | 203 |  |  |  |  |  |
Fair value of liabilities assumed | 149,272 |  |  |  |  |  |
Fair value of net assets assumed | 12,976 |  |  |  |  |  |
Goodwill recorded for Palmetto Heritage | $ 17,450 |  |  |  |  |  |
Capital Commerce Bancorp |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase Price |  | $ 28,063 |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash and due from banks |  | 3,244 |  |  |  |  |
Overnight investments |  | 1,065 |  |  |  |  |
Investment securities |  | 17,865 |  |  |  |  |
Loans |  | 184,126 |  |  |  |  |
Premises and equipment |  | 3,773 |  |  |  |  |
Income earned not collected |  | 621 |  |  |  |  |
Intangible assets |  | 2,680 |  |  |  |  |
Other assets |  | 8,513 |  |  |  |  |
Fair value of assets acquired |  | 221,887 |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Deposits |  | 172,387 |  |  |  |  |
Accrued interest payable |  | 263 |  |  |  |  |
Borrowings |  | 30,624 |  |  |  |  |
Other liabilities |  | 1,230 |  |  |  |  |
Fair value of liabilities assumed |  | 204,504 |  |  |  |  |
Fair value of net assets assumed |  | 17,383 |  |  |  |  |
Goodwill recorded for Palmetto Heritage |  | $ 10,680 |  |  |  |  |
HomeBancorp Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase Price |  |  | $ 112,657 | $ 112,700 |  |  |
Assets |  |  |  |  |  |  |
Cash and due from banks |  |  | 6,359 |  |  |  |
Overnight investments |  |  | 10,393 |  |  |  |
Investment securities |  |  | 200,918 |  |  |  |
Loans held for sale |  |  | 791 |  |  |  |
Loans |  |  | 566,173 |  |  |  |
Premises and equipment |  |  | 6,542 |  |  |  |
Other real estate owned |  |  | 2,135 |  |  |  |
Income earned not collected |  |  | 2,717 |  |  |  |
Intangible assets |  |  | 13,206 |  |  |  |
Other assets |  |  | 33,459 |  |  |  |
Fair value of assets acquired |  |  | 842,693 |  |  |  |
Liabilities |  |  |  |  |  |  |
Deposits |  |  | 619,589 |  |  |  |
Accrued interest payable |  |  | 1,020 |  |  |  |
Borrowings |  |  | 161,917 |  |  |  |
Other liabilities |  |  | 5,126 |  |  |  |
Fair value of liabilities assumed |  |  | 787,652 |  |  |  |
Fair value of net assets assumed |  |  | 55,041 |  |  |  |
Goodwill recorded for Palmetto Heritage |  |  | $ 57,616 |  |  |  |

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