RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS Changes in Other Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Change in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning of period	$ (231,618)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive income before reclassifications	(16)
Amounts reclassified from accumulated other comprehensive loss	13,796
Net current-period other comprehensive income	13,780
Balance end of period	(217,838)
Foreign Currency Translation
Change in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning of period	(192)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive income before reclassifications	(16)
Amounts reclassified from accumulated other comprehensive loss	0
Net current-period other comprehensive income	(16)
Balance end of period	(208)
Defined Benefit Pension Plans
Change in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance beginning of period	(231,426)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	13,796
Net current-period other comprehensive income	13,796
Balance end of period	$ (217,630)