DEPOSITS - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Deposit Liabilities [Abstract] | ||
| Time deposits, $250,000 or more | $ 196.5 | $ 164.7 |
| Interest-bearing domestic deposit, brokered | 65.9 | 56.5 |
| Interest-bearing domestic deposit, certificates of deposits | 64.8 | 55.5 |
| Related party deposit liabilities | $ 14.8 | $ 12.0 |