STOCKHOLDERS' EQUITY (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Amortization of unrecognized net periodic benefit costs:
LOSS BEFORE INCOME TAXES	$ (23,303)	$ (22,536)
Tax benefit	9,908	4,374
NET LOSS	(13,395)	(18,162)
Unrecognized Net Periodic Benefit Costs | Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of unrecognized net periodic benefit costs:
Net actuarial loss	(2,912)
Prior service credit	48
LOSS BEFORE INCOME TAXES	(2,864)
Tax benefit	1,114
NET LOSS	$ (1,750)