OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Comprehensive Income (Loss) [Abstract]
Change in unrealized loss on securities transferred to held to maturity, after tax	$ 12	$ 34
Tax expense (benefit)	7,177	7,176
Net income	10,034	10,570
Change in net unrealized gain during the period, tax	118	0
Change in net unrealized gain during the period, after tax	(37)	241
Change in pension and other posttirement obligations, net of deferred tax benefit of $118 during the three months ended March 31, 2014	143	0
Total other comprehensive income, before tax	222	396
Total other comprehensive income, tax	100	177
Net other comprehensive income during during the period	122	219
Securities Held-To-Maturity and Transferred Securities [Member]
Other Comprehensive Income (Loss) [Abstract]
Change in non-credit component of OTTI, pre-tax	8	8
Change in non-credit component of OTTI, tax	4	4
Change in non-credit component of OTTI, after tax	4	4
Change in unrealized loss on securities transferred to held to maturity, pre-tax	20	61
Change in unrealized loss on securities transferred to held to maturity, tax	8	27
Change in unrealized loss on securities transferred to held to maturity, after tax	12	34
Total Securities held to maturity and transferred securities before tax	28	69
Total securities held to maturity and transferred tax	12	31
Total securities held to maturity and transferred securities, after tax	16	38
Securities Available-For-Sale [Member]
Other Comprehensive Income (Loss) [Abstract]
Change in net unrealized gain during the period, pre-tax	(67)	437
Change in net unrealized gain during the period, tax	(30)	196
Change in net unrealized gain during the period, after tax	(37)	241
Total securities available-for-sale, pre-tax	(67)	327
Total securities available-for-sale, tax	(30)	146
Total securities available-for-sale, after tax	(37)	181
Securities Available-For-Sale [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment for net gains included in net gain on securities	0	(110)
Tax expense (benefit)	0	(50)
Net income	0	(60)
Defined Benefit Plans [Member]
Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment for expense included in salaries and employee benefits expense	261	0
Total defined benefit plans, pre-tax	261	0
Total defined benefit plans, tax	118	0
Change in pension and other posttirement obligations, net of deferred tax benefit of $118 during the three months ended March 31, 2014	143	0
Defined Benefit Plans [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income (Loss) [Abstract]
Tax expense (benefit)	118	0
Net income	$ 143	$ 0