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ACQUISITIONS - Acquisition Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |
Business Combination, Acquisition Related Costs, Professional Fees | $ 369 | $ 938 | $ 130
Business Combination, Acquisition Related Costs, Data Processing | 2,000 | 4,366 | 1,290
Business Combination, Acquisition Related Costs, Severance Expense | 266 | 835 | 536
Business Combination, Acquisition Related Costs, Other Expense | 383 | 480 | 369
Total | $ 3,018 | 6,619 | $ 2,325
TIG Bancorp |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Acquisition Related Costs, Professional Fees |  | 403 |
Business Combination, Acquisition Related Costs, Data Processing |  | 1,709 |
Business Combination, Acquisition Related Costs, Severance Expense |  | 257 |
Business Combination, Acquisition Related Costs, Other Expense |  | 115 |
Total |  | 2,484 |
Uniti Financial Corporation |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Acquisition Related Costs, Professional Fees |  | 535 |
Business Combination, Acquisition Related Costs, Data Processing |  | 2,657 |
Business Combination, Acquisition Related Costs, Severance Expense |  | 578 |
Business Combination, Acquisition Related Costs, Other Expense |  | 365 |
Total |  | $ 4,135 |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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