INVESTMENT SECURITIES - Securities Transferred between AFS and HTM (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2015
Investment Securities
Securities classified as trading	$ 0		$ 0
Securities transferred from available-for-sale to held-to-maturity category, amortized cost		$ 12,626,000
Securities transferred from available-for-sale to held-to-maturity category, unrealized holding gain		8,000
Transferred From Available-For-Sale to Held-To-Maturity
Investment Securities
Securities transferred from available-for-sale to held-to-maturity category, remaining unamortized loss	2,170,000
Securities transferred from available-for-sale to held-to-maturity category, remaining unamortized loss, net of tax	$ 1,410,000
Unrealized Gains (Losses) on Securities | Transferred From Available-For-Sale to Held-To-Maturity
Investment Securities
Securities transferred from available-for-sale to held-to-maturity category, unrealized holding gain		$ 8,000