FAIR VALUE MEASUREMENT (Schedule of Assets Measured at Fair Value on Recurring Basis) (Details) - Fair Value Measured on a Recurring Basis [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair value measurement [Line Items]
Fair value of assets	$ 72,480	$ 69,725
Mortgage Servicing Rights [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 19	$ 22
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value measurement [Line Items]
Fair value of assets
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage Servicing Rights [Member]
Fair value measurement [Line Items]
Fair value of assets
Significant Other Observable Inputs (Level 2) [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 72,461	$ 69,703
Significant Other Observable Inputs (Level 2) [Member] | Mortgage Servicing Rights [Member]
Fair value measurement [Line Items]
Fair value of assets
Significant Unobservable Inputs (Level 3) [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 19	$ 22
Significant Unobservable Inputs (Level 3) [Member] | Mortgage Servicing Rights [Member]
Fair value measurement [Line Items]
Fair value of assets	19	22	$ 25
U.S. Agencies Debt Securities [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 30,450	$ 12,339
U.S. Agencies Debt Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value measurement [Line Items]
Fair value of assets
U.S. Agencies Debt Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 30,450	$ 12,339
U.S. Agencies Debt Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value measurement [Line Items]
Fair value of assets
Mortgage-backed Securities [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 34,525	$ 56,355
Mortgage-backed Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value measurement [Line Items]
Fair value of assets
Mortgage-backed Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 34,525	$ 56,355
Mortgage-backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value measurement [Line Items]
Fair value of assets
Non-Government Mortgage-backed Securities [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 7,486	$ 1,009
Non-Government Mortgage-backed Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value measurement [Line Items]
Fair value of assets
Non-Government Mortgage-backed Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value measurement [Line Items]
Fair value of assets	$ 7,486	$ 1,009
Non-Government Mortgage-backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value measurement [Line Items]
Fair value of assets