STOCKHOLDERS' EQUITY (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Unrecognized net periodic benefit costs:
INCOME (LOSS) BEFORE INCOME TAXES	$ 21,004	$ 11,776	$ 5,566	$ (4,676)
Tax benefit	(7,022)	(5,258)	(101)	4,873
NET INCOME	13,982	6,518	5,465	197
Unrecognized Net Periodic Benefit Costs | Amount Reclassified from Accumulated Other Comprehensive Loss
Unrecognized net periodic benefit costs:
Amortization of net actuarial loss			(6,984)
Amortization of prior service credit			142
Settlement expense			(1,834)
INCOME (LOSS) BEFORE INCOME TAXES			(8,676)
Tax benefit			3,375
NET INCOME			$ (5,301)