SECURITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Available for sale:
Amortized Cost	$ 623,683	$ 592,667
Gross Unrealized Gains	1,740	1,371
Gross Unrealized Losses	(5,951)	(6,854)
Estimated Fair Value	619,472	587,184
Held to maturity:
Amortized Cost	221,756	214,927
Gross Unrealized Gains	3,091	2,939
Gross Unrealized Losses	(1,699)	(1,577)
Estimated Fair Value	223,148	216,289
Total securities
Amortized Cost	845,439	807,594
Gross Unrealized Gains	4,831	4,310
Gross Unrealized Losses	(7,650)	(8,431)
Total securities	842,620	803,473
U.S. GSE securities
Available for sale:
Amortized Cost	68,015	97,560
Gross Unrealized Gains	42	4
Gross Unrealized Losses	(821)	(2,139)
Estimated Fair Value	67,236	95,425
Held to maturity:
Amortized Cost	11,298	11,283
Gross Unrealized Gains	$ 178	135
Gross Unrealized Losses		(41)
Estimated Fair Value	$ 11,476	11,377
State and municipal obligations
Available for sale:
Amortized Cost	72,454	63,583
Gross Unrealized Gains	206	318
Gross Unrealized Losses	(313)	(208)
Estimated Fair Value	72,347	63,693
Held to maturity:
Amortized Cost	62,255	64,864
Gross Unrealized Gains	1,760	1,658
Gross Unrealized Losses	(263)	(98)
Estimated Fair Value	63,752	66,424
U.S. GSE residential mortgage-backed securities
Available for sale:
Amortized Cost	162,236	100,931
Gross Unrealized Gains	387	534
Gross Unrealized Losses	(619)	(40)
Estimated Fair Value	162,004	101,425
Held to maturity:
Amortized Cost	$ 8,413	$ 6,667
Gross Unrealized Gains
Gross Unrealized Losses	$ (106)	$ (97)
Estimated Fair Value	8,307	6,570
U.S. GSE Residential collateralized mortgage Obligations
Available for sale:
Amortized Cost	235,102	261,256
Gross Unrealized Gains	1,069	310
Gross Unrealized Losses	(2,454)	(2,967)
Estimated Fair Value	233,717	258,599
Held to maturity:
Amortized Cost	60,031	59,539
Gross Unrealized Gains	573	507
Gross Unrealized Losses	(758)	(862)
Estimated Fair Value	59,846	59,184
U.S. GSE commercial mortgage-backed securities
Available for sale:
Amortized Cost	12,607	$ 3,016
Gross Unrealized Gains	20
Gross Unrealized Losses	(48)	$ (71)
Estimated Fair Value	12,579	2,945
Held to maturity:
Amortized Cost	23,244	13,213
Gross Unrealized Gains	172	233
Gross Unrealized Losses	(329)	(26)
Estimated Fair Value	23,087	13,420
U.S. GSE commercial collateralized mortgage obligations
Available for sale:
Amortized Cost	31,066	24,179
Gross Unrealized Gains	6	44
Gross Unrealized Losses	(158)	(141)
Estimated Fair Value	30,914	24,082
Held to maturity:
Amortized Cost	33,536	36,413
Gross Unrealized Gains	314	267
Gross Unrealized Losses	(235)	(431)
Estimated Fair Value	33,615	36,249
Other Asset backed securities
Available for sale:
Amortized Cost	$ 24,247	$ 24,190
Gross Unrealized Gains
Gross Unrealized Losses	$ (1,210)	$ (1,153)
Estimated Fair Value	23,037	23,037
Corporate bonds
Available for sale:
Amortized Cost	17,956	17,952
Gross Unrealized Gains	10	161
Gross Unrealized Losses	(328)	(135)
Estimated Fair Value	17,638	17,978
Held to maturity:
Amortized Cost	22,979	22,948
Gross Unrealized Gains	94	139
Gross Unrealized Losses	(8)	(22)
Estimated Fair Value	$ 23,065	$ 23,065