ACCOUNTING FOR CERTAIN LOANS ACQUIRED IN A TRANSFER - Carrying amount of loans included in balance sheet of loans receivable (Details) (Dupont State Bank, Loans Receivable, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	$ 4,472	$ 5,222
Fair value adjustment for credit impaired loans	(1,523)	(2,119)
Carrying balance of acquired credit impaired loans	2,949	3,103
Construction / Land
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	744	750
One-to-four family residential
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	1,834	2,149
Multi-family residential
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	685	685
Nonresidential and agricultural land
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	1,141	1,523
Commercial
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	27	64
Consumer
Business Acquisition [Line Items]
Outstanding balance of acquired credit impaired loans	$ 41	$ 51