ACCUMULATED OTHER COMPREHENSIVE 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
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (10,638)	[1]			$ (10,869)	[2]
Other comprehensive income before reclassifications	(53)				163
Amounts reclassified from AOCL	(554)	[3]			(539)	[3]
Other Comprehensive (Loss) Gain - Net of Tax	(607)	[1]	228	[1]	(376)	[1]	(55)	[1]
Ending balance	(11,245)	[1],[2]			(11,245)	[1],[2]
Combined statutory tax rate	41.00%		41.00%		41.00%		41.00%
Postretirement Liability Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(10,672)	[1]			(10,672)	[2]
Other comprehensive income before reclassifications	0				0
Amounts reclassified from AOCL	0	[3]			0	[3]
Other Comprehensive (Loss) Gain - Net of Tax	0				0
Ending balance	(10,672)	[1],[2]			(10,672)	[1],[2]
Unrealized Gain (Loss) on Derivatives-Other
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(579)	[1]			(594)	[2]
Other comprehensive income before reclassifications	0				0
Amounts reclassified from AOCL	6	[3]			21	[3]
Other Comprehensive (Loss) Gain - Net of Tax	6				21
Ending balance	(573)	[1],[2]			(573)	[1],[2]
Unrealized Gain (Loss) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	613	[1]			397	[2]
Other comprehensive income before reclassifications	(53)				163
Amounts reclassified from AOCL	(560)	[3]			(560)	[3]
Other Comprehensive (Loss) Gain - Net of Tax	(613)				(397)
Ending balance	$ 0	[1],[2]			$ 0	[1],[2]

[1] Determined using a combined statutory tax rate of 41% .

[2] Determined using a combined statutory tax rate of 41%.

[3] See table below.