ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Other Comprehensive Income (Loss), before Reclassification Adjustments and Tax [Abstract]
Unrealized gain (loss) on investment securities	$ 10,145	$ (24,399)	$ 16,243	$ (28,256)
Unrealized gain (loss) on derivatives	(1,133)	1,041	(1,977)	1,177
Retirement obligation	0	11,719	0	11,719
Foreign Currency Translation	8	(15)	(1)	(27)
Total	9,020	(11,654)	14,265	(15,387)
Other Comprehensive Income (Loss) Reclassifications before Tax [Abstract]
Unrealized gain (loss) on investment securities	0	188	50	1,724
Unrealized gain (loss) on derivatives	(116)	(68)	(231)	(134)
Retirement obligation	(379)	(4,935)	(757)	(5,650)
Foreign Currency Translation	0	0	0	0
Total	(495)	(4,815)	(938)	(4,060)
Transactions Pre-tax
Unrealized gain (loss) on investment securities	10,145	(24,587)	16,193	(29,980)
Unrealized gain (loss) on derivatives	(1,017)	1,109	(1,746)	1,311
Unfunded pension obligation	379	16,654	757	17,369
Foreign currency translation	8	(15)	(1)	(27)
Total	9,515	(6,839)	15,203	(11,327)
Transactions Tax-effect
Unrealized gain (loss) on investment securities	(3,674)	9,377	(5,860)	11,413
Unrealized gain (loss) on derivatives	380	(419)	652	(495)
Retirement obligation	(142)	(6,289)	(283)	(6,559)
Foreign currency translation	0	0	0	0
Total	(3,436)	2,669	(5,491)	4,359
Transactions Net of tax
Unrealized gain (loss) on investment securities	6,471	(15,210)	10,333	(18,567)
Unrealized gain (loss) on derivatives	(637)	690	(1,094)	816
Retirement obligation	237	10,365	474	10,810
Foreign currency translation	8	(15)	(1)	(27)
Total	6,079	(4,170)	9,712	(6,968)
Balances Net of tax
Unrealized gain (loss) on investment securities	(5,956)	(5,765)	(5,956)	(5,765)	(12,427)	(16,289)	9,445	12,802
Unrealized gain (loss) on cash flow hedges	(492)	673	(492)	673	145	602	(17)	(143)
Retirement obligation	(15,091)	(20,528)	(15,091)	(20,528)	(15,328)	(15,565)	(30,893)	(31,338)
Foreign currency translation	(30)	(25)	(30)	(25)	(38)	(29)	(10)	2
Total	$ (21,569)	$ (25,645)	$ (21,569)	$ (25,645)	$ (27,648)	$ (31,281)	$ (21,475)	$ (18,677)