DEPOSITS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash and Cash Equivalents [Line Items]
Time deposits held in Certificates of Deposit	$ 2,089,706
Deposit overdrafts as other consumer loans	2,000	$ 1,300
CDARS
Cash and Cash Equivalents [Line Items]
Time deposits held in Certificates of Deposit	$ 118,300	$ 13,900
Maximum | CDARS
Cash and Cash Equivalents [Line Items]
Maturity of deposits held in Certificate of Deposits	1 year