OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Comprehensive Income (Loss) [Abstract]
Change in unrealized loss on securities transferred to held to maturity, after tax	$ 7	$ 10	$ 29	$ 72
Tax expense (benefit)	7,788	7,215	22,496	22,450
Net income	11,765	10,631	32,259	33,240
Change in net unrealized gain during the period, tax	(24)	74	2	125
Change in net unrealized gain during the period, after tax	(30)	90	3	156
Total defined benefit plans, tax	117	0	351	0
Change in pension and other postretirement obligations, net of deferred tax expense of $117 during the three months ended September 30, 2014 and $351 during the nine months ended September 30, 2014	144	0	432	0
Total other comprehensive income, before tax	227	190	862	326
Total other comprehensive income, tax	102	86	387	146
Net other comprehensive income during during the period	125	104	475	180
Securities Held-To-Maturity and Transferred Securities [Member]
Other Comprehensive Income (Loss) [Abstract]
Change in non-credit component of OTTI, pre-tax	8	8	24	25
Change in non-credit component of OTTI, tax	4	4	13	13
Change in non-credit component of OTTI, after tax	4	4	11	12
Change in unrealized loss on securities transferred to held to maturity, pre-tax	12	18	50	130
Change in unrealized loss on securities transferred to held to maturity, tax	5	8	21	58
Change in unrealized loss on securities transferred to held to maturity, after tax	7	10	29	72
Total Securities held to maturity and transferred securities before tax	20	26	74	155
Total securities held to maturity and transferred tax	9	12	34	71
Total securities held to maturity and transferred securities, after tax	11	14	40	84
Securities Available-For-Sale [Member]
Other Comprehensive Income (Loss) [Abstract]
Change in net unrealized gain during the period, pre-tax	(54)	164	5	281
Change in net unrealized gain during the period, tax	(24)	74	2	125
Change in net unrealized gain during the period, after tax	(30)	90	3	156
Total securities available-for-sale, pre-tax	(54)	164	5	171
Total securities available-for-sale, tax	(24)	74	2	75
Total securities available-for-sale, after tax	(30)	90	3	96
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]
Total defined benefit plans, pre-tax	261	0	783	0
Total defined benefit plans, tax	117	0	351	0
Change in pension and other postretirement obligations, net of deferred tax expense of $117 during the three months ended September 30, 2014 and $351 during the nine months ended September 30, 2014	144	0	432	0
Defined Benefit Plans [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment for expense included in salaries and employee benefits expense	261	0	783	0
Tax expense (benefit)	117	0	351	0
Net income	$ 144	$ 0	$ 432	$ 0