STOCKHOLDERS' EQUITY (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period			$ (57,372)
Other comprehensive income (loss) before reclassifications			30,601
Amounts reclassified from accumulated other comprehensive loss			5,301
OTHER COMPREHENSIVE INCOME, net of tax	4,263	1,790	35,902	5,196
Balance at the end of the period	(21,470)		(21,470)
Unrecognized Net Periodic Benefit Costs
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period			(56,968)
Other comprehensive income (loss) before reclassifications			30,633
Amounts reclassified from accumulated other comprehensive loss			5,301
OTHER COMPREHENSIVE INCOME, net of tax			35,934
Balance at the end of the period	(21,034)		(21,034)
Foreign Currency Translation
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period			(404)
Other comprehensive income (loss) before reclassifications			(32)
Amounts reclassified from accumulated other comprehensive loss			0
OTHER COMPREHENSIVE INCOME, net of tax			(32)
Balance at the end of the period	$ (436)		$ (436)