ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Other Comprehensive Income (Loss), before Reclassification Adjustments and Tax [Abstract]
Unrealized gain (loss) on investment securities	$ 6,098	$ (3,857)
Unrealized gain (loss) on derivatives	(844)	136
Retirement obligation	0	0
Foreign Currency Translation	(9)	(12)
Total	5,245	(3,733)
Other Comprehensive Income (Loss) Reclassifications before Tax [Abstract]
Unrealized gain (loss) on investment securities	50	1,536
Unrealized gain (loss) on derivatives	(115)	(66)
Retirement obligation	(378)	(715)
Foreign Currency Translation	0	0
Total	(443)	755
Transactions Pre-tax
Unrealized gain (loss) on investment securities	6,048	(5,393)
Unrealized gain (loss) on derivatives	(729)	202
Unfunded pension obligation	378	715
Foreign currency translation	(9)	(12)
Total	5,688	(4,488)
Transactions Tax-effect
Unrealized gain (loss) on investment securities	(2,186)	2,036
Unrealized gain (loss) on derivatives	272	(76)
Retirement obligation	(141)	(270)
Foreign currency translation	0	0
Total	(2,055)	1,690
Transactions Net of tax
Unrealized gain (loss) on investment securities	3,862	(3,357)
Unrealized gain (loss) on derivatives	(457)	126
Retirement obligation	237	445
Foreign currency translation	(9)	(12)
Total	3,633	(2,798)
Balances Net of tax
Unrealized gain (loss) on investment securities	(12,427)	9,445	(16,289)	12,802
Unrealized gain (loss) on cash flow hedges	145	(17)	602	(143)
Retirement obligation	(15,328)	(30,893)	(15,565)	(31,338)
Foreign currency translation	(38)	(10)	(29)	2
Total	$ (27,648)	$ (21,475)	$ (31,281)	$ (18,677)