OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), before Tax [Abstract]
Change in fair value of securities available for sale, pre tax amount	$ (3,757)	$ 9,095	$ (11,943)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale and Write-down of Securities, before Tax	(405)	191	230
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	(3,352)	8,904	(12,173)
Change in fair value of cash flow hedges, pre tax amount	(776)	(969)	592
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Borrowings Expense, before Tax	(2,828)	(3,662)	(5,723)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, before Tax		(1,122)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent	2,052	3,815	6,315
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	438	(2,699)	1,302
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax		1,357
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	(243)	44	(42)
Amortization of certain costs included in net periodic retirement costs, pre tax amount	(294)	(102)	(102)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), before Tax		2	(4)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	975	(4,000)	1,450
Total other comprehensive loss, pre tax amount	(325)	8,719	(4,408)
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	1,434	(3,570)	4,578
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale and Write-down of Securities, Tax	165	(78)	(94)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent	1,269	(3,492)	4,672
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	299	396	(242)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Borrowings Expense, Tax	1,152	1,496	2,338
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, Tax		459
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent	(853)	(1,559)	(2,580)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	(193)	1,103	(532)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax		(554)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax	99	(18)	17
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Tax	119	42	42
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), before Tax		(1)	1
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	(411)	1,634	(592)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	5	(3,417)	1,500
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(2,323)	5,525	(7,365)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale and Write-down of Securities, Net of Tax	(240)	113	136
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(2,083)	5,412	(7,501)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(477)	(573)	350
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Borrowings Expense, Net of Tax	(1,676)	(2,166)	(3,385)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Loss on Termination of Derivatives, Net of Tax		(663)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent	1,199	2,256	3,735
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	245	(1,596)	770
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, Net of Tax		803
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax	(144)	26	(25)
Amortization of certain costs included in net periodic retirement costs, after tax amount	(175)	(60)	(60)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), Net of Tax		1	(3)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	564	(2,366)	858
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (320)	$ 5,302	$ (2,908)