DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional amount	$ 213,600	$ 255,600
Difference in carrying value and fair value, reflecting a loss		$ 109
Average maturity	30 months 6 days	42 months 3 days
Average interest receive rate (in hundredths)	2.90%	2.60%
Average interest pay rate (in hundredths)	5.60%	5.60%
Forward Commitments [Member]
Derivative [Line Items]
Notional amount	$ 238,300	$ 211,200
Difference in carrying value and fair value, reflecting a gain	2,900
Commitments To Fund Fixed Rate Mortgage Loans [Member]
Derivative [Line Items]
Notional amount	140,900	142,100
Difference in carrying value and fair value, reflecting a gain	$ 3,400	$ 3,400