FAIR VALUE MEASUREMENTS - Unobservable Inputs Recurring (Details)	12 Months Ended
	Dec. 31, 2017 USD ($)
Quantitative information about the significant unobservable inputs within Level 3
Derivative asset (liability), fair value	$ 447,000
Level 3 | Recurring
Quantitative information about the significant unobservable inputs within Level 3
Total	(222,000)
Level 3 | Recurring | Interest Rate Lock Commitment
Quantitative information about the significant unobservable inputs within Level 3
Derivative asset (liability), fair value	$ (1,000)
Level 3 | Recurring | Interest Rate Lock Commitment | Pricing Model
Quantitative information about the significant unobservable inputs within Level 3
Closing Ratio	90.00%
Origination Costs, per loan	$ 1,700
Level 3 | Recurring | Forward Commitments
Quantitative information about the significant unobservable inputs within Level 3
Derivative asset (liability), fair value	$ (221,000)