ACCOUNTING FOR CERTAIN LOANS ACQUIRED IN A TRANSFER - Carrying amount of loans included in balance sheet of loans receivable (Details) - Loans Receivable - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Carrying balance of acquired credit-impaired loans	$ 1,463	$ 1,873
Construction/Land
Business Acquisition [Line Items]
Carrying balance of acquired credit-impaired loans	53	411
One-to-four family residential
Business Acquisition [Line Items]
Carrying balance of acquired credit-impaired loans	$ 994	$ 1,035
Multi-family residential
Business Acquisition [Line Items]
Carrying balance of acquired credit-impaired loans
Commercial
Business Acquisition [Line Items]
Carrying balance of acquired credit-impaired loans	$ 13	$ 14
Dupont State Bank
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans	2,065	2,703
Fair value adjustment for credit-impaired loans	(602)	(830)
Carrying balance of acquired credit-impaired loans	1,463	1,873
Dupont State Bank | Construction/Land
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans	131	682
Dupont State Bank | One-to-four family residential
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans	$ 1,333	$ 1,400
Dupont State Bank | Multi-family residential
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans
Dupont State Bank | Nonresidential real estate and agricultural land
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans	$ 555	$ 568
Dupont State Bank | Commercial
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans	23	24
Dupont State Bank | Consumer and other
Business Acquisition [Line Items]
Outstanding balance of acquired credit-impaired loans	$ 23	$ 29