INVESTMENT SECURITIES (Details 5) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Amortized cost	$ 773,856
Fair value	792,657	729,844
Us Treasury Securities [Member]
Amortized,one year or less	0
Amortized,after one year through five years	200
Amortized, after five through ten years	0
Amortized,due after ten years	0
Amortized cost	200
Fair value,one year or less	0
Fair value,after one year through five years	200
Fair value,after five through ten years	0
Fair value,due after ten years	0
Fair value	200	203
Us Government Agencies Debt Securities [Member]
Amortized,one year or less	600
Amortized,after one year through five years	160,010
Amortized, after five through ten years	65,118
Amortized,due after ten years	0
Amortized cost	225,728
Fair value,one year or less	604
Fair value,after one year through five years	163,732
Fair value,after five through ten years	66,024
Fair value,due after ten years	0
Fair value	230,360
Corporate Debt Securities [Member]
Amortized,one year or less	0
Amortized,after one year through five years	500
Amortized, after five through ten years	0
Amortized,due after ten years	13,803
Amortized cost	14,303
Fair value,one year or less	0
Fair value,after one year through five years	500
Fair value,after five through ten years	0
Fair value,due after ten years	8,519
Fair value	9,019	8,507
Us States and Political Subdivisions Debt Securities [Member]
Amortized,one year or less	1,817
Amortized,after one year through five years	18,319
Amortized, after five through ten years	35,643
Amortized,due after ten years	19,169
Amortized cost	74,948
Fair value,one year or less	1,839
Fair value,after one year through five years	19,395
Fair value,after five through ten years	38,687
Fair value,due after ten years	20,195
Fair value	80,116	60,732
Collateralized Mortgage Backed Securities [Member]
Amortized cost	447,437
Fair value	461,077	428,725
Equity Securities, Other [Member]
Amortized cost	11,240
Fair value	$ 11,885	$ 12,046