ESTIMATED FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets measured at fair value on recurring basis
Available for sale securities	$ 529,998	$ 587,184
U.S. GSE securities
Assets measured at fair value on recurring basis
Available for sale securities	67,890	95,425
State and municipal obligations
Assets measured at fair value on recurring basis
Available for sale securities	62,939	63,693
U.S. GSE residential mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities	129,846	101,425
U.S. GSE Residential collateralized mortgage Obligations
Assets measured at fair value on recurring basis
Available for sale securities	203,238	258,599
U.S. GSE commercial mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities	2,981	2,945
U.S. GSE commercial collateralized mortgage obligations
Assets measured at fair value on recurring basis
Available for sale securities	21,592	24,082
Other Asset backed securities
Assets measured at fair value on recurring basis
Available for sale securities	23,280	23,037
Corporate bonds
Assets measured at fair value on recurring basis
Available for sale securities	18,232	17,978
Significant Other Observable Inputs (Level 2)
Assets measured at fair value on recurring basis
Available for sale securities	529,998	587,184
Carrying Amount
Assets measured at fair value on recurring basis
Available for sale securities	529,998	587,184
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets measured at fair value on recurring basis
Available for sale securities	529,998	587,184
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. GSE securities
Assets measured at fair value on recurring basis
Available for sale securities	67,890	95,425
Recurring basis | Significant Other Observable Inputs (Level 2) | State and municipal obligations
Assets measured at fair value on recurring basis
Available for sale securities	62,939	63,693
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. GSE residential mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities	129,846	101,425
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. GSE Residential collateralized mortgage Obligations
Assets measured at fair value on recurring basis
Available for sale securities	203,238	258,599
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. GSE commercial mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities	2,981	2,945
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. GSE commercial collateralized mortgage obligations
Assets measured at fair value on recurring basis
Available for sale securities	21,592	24,082
Recurring basis | Significant Other Observable Inputs (Level 2) | Non Agency commercial mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities		23,037
Recurring basis | Significant Other Observable Inputs (Level 2) | Other Asset backed securities
Assets measured at fair value on recurring basis
Available for sale securities	23,280	17,978
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate bonds
Assets measured at fair value on recurring basis
Available for sale securities	18,232
Recurring basis | Significant Other Observable Inputs (Level 2) | Derivatives
Financial Liabilities:
Available for sale securities	(1,624)	(943)
Recurring basis | Carrying Amount
Assets measured at fair value on recurring basis
Available for sale securities	529,998	587,184
Recurring basis | Carrying Amount | U.S. GSE securities
Assets measured at fair value on recurring basis
Available for sale securities	67,890	95,425
Recurring basis | Carrying Amount | State and municipal obligations
Assets measured at fair value on recurring basis
Available for sale securities	62,939	63,693
Recurring basis | Carrying Amount | U.S. GSE residential mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities	129,846	101,425
Recurring basis | Carrying Amount | U.S. GSE Residential collateralized mortgage Obligations
Assets measured at fair value on recurring basis
Available for sale securities	203,238	258,599
Recurring basis | Carrying Amount | U.S. GSE commercial mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities	2,981	2,945
Recurring basis | Carrying Amount | U.S. GSE commercial collateralized mortgage obligations
Assets measured at fair value on recurring basis
Available for sale securities	21,592	24,082
Recurring basis | Carrying Amount | Non Agency commercial mortgage-backed securities
Assets measured at fair value on recurring basis
Available for sale securities		23,037
Recurring basis | Carrying Amount | Other Asset backed securities
Assets measured at fair value on recurring basis
Available for sale securities	23,280	17,978
Recurring basis | Carrying Amount | Corporate bonds
Assets measured at fair value on recurring basis
Available for sale securities	18,232
Recurring basis | Carrying Amount | Derivatives
Financial Liabilities:
Available for sale securities	$ (1,624)	$ (943)