SECURITIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Available for sale:
Amortized Cost	$ 640,965	$ 595,067
Gross Unrealized Gains	1,114	1,448
Gross Unrealized Losses	(15,347)	(21,336)
Estimated Fair Value	626,732	575,179
Held to maturity:
Amortized Cost	216,043	201,328
Gross Unrealized Gains	1,994	1,603
Gross Unrealized Losses	(4,193)	(5,592)
Estimated Fair Value	213,844	197,339
Available for sale and held to maturity investment securities
Amortized Cost	857,008	796,395
Gross Unrealized Gains	3,108	3,051
Gross Unrealized Losses	(19,540)	(26,928)
Total securities	840,576	772,518
U.S. GSE securities
Available for sale:
Amortized Cost	133,504	164,278
Gross Unrealized Gains	52	15
Gross Unrealized Losses	(6,776)	(11,536)
Estimated Fair Value	126,780	152,757
Held to maturity:
Amortized Cost	11,261	11,254
Gross Unrealized Losses	(141)	(375)
Estimated Fair Value	11,120	10,879
State and municipal obligations
Available for sale:
Amortized Cost	66,401	62,141
Gross Unrealized Gains	515	602
Gross Unrealized Losses	(540)	(1,087)
Estimated Fair Value	66,376	61,656
Held to maturity:
Amortized Cost	66,790	67,232
Gross Unrealized Gains	1,057	863
Gross Unrealized Losses	(22)	(179)
Estimated Fair Value	67,825	67,916
U.S. GSE residential mortgage-backed securities
Available for sale:
Amortized Cost	57,820	14,609
Gross Unrealized Gains	44	36
Gross Unrealized Losses	(443)	(210)
Estimated Fair Value	57,421	14,435
Held to maturity:
Amortized Cost	7,599	8,001
Gross Unrealized Losses	(237)	(312)
Estimated Fair Value	7,362	7,689
U.S. GSE residential collateralized mortgage obligations
Available for sale:
Amortized Cost	271,898	285,595
Gross Unrealized Gains	239	559
Gross Unrealized Losses	(5,434)	(6,963)
Estimated Fair Value	266,703	279,191
Held to maturity:
Amortized Cost	65,831	68,197
Gross Unrealized Gains	510	537
Gross Unrealized Losses	(2,922)	(3,655)
Estimated Fair Value	63,419	65,079
U.S. GSE commercial mortgage-backed securities
Available for sale:
Amortized Cost	3,061	3,076
Gross Unrealized Losses	(169)	(242)
Estimated Fair Value	2,892	2,834
Held to maturity:
Amortized Cost	10,082	10,132
Gross Unrealized Losses	(208)	(356)
Estimated Fair Value	9,874	9,776
U.S. GSE commercial collateralized mortgage obligations
Available for sale:
Amortized Cost	32,760	26,740
Gross Unrealized Gains	166	194
Gross Unrealized Losses	(81)	(24)
Estimated Fair Value	32,845	26,910
Held to maturity:
Amortized Cost	31,580	13,627
Gross Unrealized Gains	291
Gross Unrealized Losses	(637)	(706)
Estimated Fair Value	31,234	12,921
Non Agency commercial mortgage-backed securities
Available for sale:
Amortized Cost	817	3,658
Gross Unrealized Losses	(24)	(80)
Estimated Fair Value	793	3,578
Other Asset backed securities
Available for sale:
Amortized Cost	57,715	34,970
Gross Unrealized Gains	45	42
Gross Unrealized Losses	(1,843)	(1,194)
Estimated Fair Value	55,917	33,818
Corporate Bonds
Available for sale:
Amortized Cost	16,989
Gross Unrealized Gains	53
Gross Unrealized Losses	(37)
Estimated Fair Value	17,005
Held to maturity:
Amortized Cost	22,900	22,885
Gross Unrealized Gains	136	203
Gross Unrealized Losses	(26)	(9)
Estimated Fair Value	$ 23,010	$ 23,079