DEPOSITS (Narrative) (Details) - USD ($) $ in Thousands  | 
Dec. 31, 2019  | 
Dec. 31, 2018  | 
|---|---|---|
| Cash and Cash Equivalents [Line Items] | ||
| Time deposits held in Certificates of Deposit | $ 2,749,425 | |
| Deposit overdrafts as other commercial/consumer loans | 2,600 | $ 2,000 | 
| CDARS | ||
| Cash and Cash Equivalents [Line Items] | ||
| Time deposits held in Certificates of Deposit | $ 73,900 | $ 118,300 | 
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- Definition Deposit overdraft. No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount of time deposit liabilities, including certificates of deposit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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