ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Amortization of pension and other post-retirement liability adjustments
Tax Benefit		$ 8,982	$ 6,753	$ 19,118	$ 11,038
Net of Tax				(34,657)	(18,673)
Amounts reclassified from accumulated other comprehensive income (loss)
Amortization of pension and other post-retirement liability adjustments
Prior Service Costs	[1]	(72)	(558)	(144)	(1,116)
Actuarial Losses	[1]	2,258	656	4,516	1,312
Total Before Tax		2,186	98	4,372	196
Tax Benefit		(804)	(34)	(1,608)	(69)
Net of Tax		$ 1,382	$ 64	$ 2,764	$ 127

[1] These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension costs. See Note 8 for additional information.