FAIR VALUE MEASUREMENT, Assets Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Summary of fair value measurements of assets measured on a non-recurring basis [Abstract]
Impaired loans	$ 17,552		$ 17,543
Foreclosed real estate and repossessed assets	486	$ 362	137	$ 55	$ 129	$ 198
Loans held-for-sale at carrying value	58,561		61,416
Non-recurring [Member]
Summary of fair value measurements of assets measured on a non-recurring basis [Abstract]
Impaired loans	3,381		2,008
Foreclosed real estate and repossessed assets	486		137
Total	3,867		2,145
Non-recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Summary of fair value measurements of assets measured on a non-recurring basis [Abstract]
Impaired loans	0		0
Foreclosed real estate and repossessed assets	0		0
Total	0		0
Non-recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of fair value measurements of assets measured on a non-recurring basis [Abstract]
Impaired loans	3,381		2,008
Foreclosed real estate and repossessed assets	486		137
Total	3,867		2,145
Non-recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of fair value measurements of assets measured on a non-recurring basis [Abstract]
Impaired loans	0		0
Foreclosed real estate and repossessed assets	0		0
Total	$ 0		$ 0