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INVESTMENT SECURITIES (Details) (USD $)	3 Months Ended
INVESTMENT SECURITIES (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2008
Securities available for sale:
Gross Amortized Cost	$ 455,803,000		$ 428,785,000
Gross Unrealized Gains	9,173,000		8,378,000
Gross Unrealized Losses	(831,000)		(1,252,000)
Fair Value	464,145,000us-gaap_AvailableForSaleSecurities		435,911,000us-gaap_AvailableForSaleSecurities
Amount of floating rate corporate bonds purchased	767,299,000	30,000,000
U.S. Treasury securities and U.S. Government agencies
Securities available for sale:
Gross Amortized Cost	186,819,000		146,625,000
Gross Unrealized Gains	1,119,000		312,000
Gross Unrealized Losses	(1,000)		(15,000)
Fair Value	187,937,000		146,922,000
Private label mortgage backed security
Securities available for sale:
Gross Amortized Cost	4,037,000		4,030,000
Gross Unrealized Gains	1,198,000		1,220,000
Fair Value	5,235,000		5,250,000
Mortgage backed securities - residential
Securities available for sale:
Gross Amortized Cost	112,764,000		118,836,000
Gross Unrealized Gains	5,330,000		5,511,000
Gross Unrealized Losses	(121,000)		(91,000)
Fair Value	117,973,000		124,256,000
Collateralized mortgage obligations
Securities available for sale:
Gross Amortized Cost	136,172,000		143,283,000
Gross Unrealized Gains	1,144,000		1,034,000
Gross Unrealized Losses	(709,000)		(1,146,000)
Fair Value	136,607,000		143,171,000
Freddie Mac
Securities available for sale:
Gross Unrealized Gains	271,000		231,000
Fair Value	271,000		231,000	0
Mutual fund
Securities available for sale:
Gross Amortized Cost	1,000,000		1,000,000
Gross Unrealized Gains	27,000		18,000
Fair Value	1,027,000		1,018,000
Corporate bonds
Securities available for sale:
Gross Amortized Cost	15,011,000		15,011,000
Gross Unrealized Gains	84,000		52,000
Fair Value	$ 15,095,000		$ 15,063,000