STOCKHOLDERS' EQUITY (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period	$ (57,372)
Other comprehensive loss before reclassifications	(19)
Amounts reclassified from accumulated other comprehensive loss	1,750
OTHER COMPREHENSIVE INCOME, net of tax	1,731	1,723
Balance at the end of the period	(55,641)
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 loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	1,750
OTHER COMPREHENSIVE INCOME, net of tax	1,750
Balance at the end of the period	(55,218)
Foreign Currency Translation
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period	(404)
Other comprehensive loss before reclassifications	(19)
Amounts reclassified from accumulated other comprehensive loss	0
OTHER COMPREHENSIVE INCOME, net of tax	(19)
Balance at the end of the period	$ (423)