EXIT ACTIVITIES AND RESTRUCTURING - Summary of activity and balances for restructuring and asset impairment activity (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring Reserve [Roll Forward]
Exit and Restructuring Liability, Beginning Balance	$ 7,593	$ 7,964
Initial Restructuring Charges	61	421
Subsequent Plan Adjustments	1,109	1,658
Cash Payments	(2,890)	(2,450)
Exit and Restructuring Liability, Ending Balance	5,873	7,593
Real Estate Obligations | 2012 exit activity
Restructuring Reserve [Roll Forward]
Exit and Restructuring Liability, Beginning Balance
Initial Restructuring Charges	61
Subsequent Plan Adjustments	(9)
Cash Payments	(19)
Exit and Restructuring Liability, Ending Balance	33
Real Estate Obligations | 2011 exit activity
Restructuring Reserve [Roll Forward]
Exit and Restructuring Liability, Beginning Balance	361
Initial Restructuring Charges		421
Subsequent Plan Adjustments	(87)	60
Cash Payments	(161)	(120)
Exit and Restructuring Liability, Ending Balance	113	361
Real Estate Obligations | 2010 exit activity
Restructuring Reserve [Roll Forward]
Exit and Restructuring Liability, Beginning Balance		12
Initial Restructuring Charges
Subsequent Plan Adjustments
Cash Payments		(12)
Exit and Restructuring Liability, Ending Balance
Real Estate Obligations | 2007 restructuring
Restructuring Reserve [Roll Forward]
Exit and Restructuring Liability, Beginning Balance	5,162	5,635
Initial Restructuring Charges
Subsequent Plan Adjustments	1,018	1,124
Cash Payments	(1,935)	(1,597)
Exit and Restructuring Liability, Ending Balance	4,245	5,162
Real Estate Obligations | 2001 restructuring
Restructuring Reserve [Roll Forward]
Exit and Restructuring Liability, Beginning Balance	2,070	2,317
Initial Restructuring Charges
Subsequent Plan Adjustments	187	474
Cash Payments	(775)	(721)
Exit and Restructuring Liability, Ending Balance	$ 1,482	$ 2,070