ACQUISITIONS PCI Loans (Details 1) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Feb. 20, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Interest component of expected cash flows	$ (2,431)	$ (2,527)		$ (2,974)	$ (3,558)	$ (3,845)	$ (2,514)
Peoples Federal Bancshares, Inc [Member]
Business Acquisition [Line Items]
Contractually required principal and interest payments receivable			$ 4,358
Certain Loans Acquired in Transfer, Nonaccretable Difference			(1,596)
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition			2,762
Interest component of expected cash flows			(319)
Less: fair value (initial carrying amount)			$ 2,443