FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Additional disclosure
Impairment of long-lived assets	$ 685,000		$ 685,000	$ 40,000
Impairment of goodwill			500,000
Impairment charge of indefinite-lived intangibles		0		0
11.5% Senior Secured Second Lien Notes
Liabilities
Face amount of notes	565,000,000	565,000,000	565,000,000
Interest rate (as a percent)	11.50%	11.50%	11.50%
Carrying value | 11.5% Senior Secured Second Lien Notes
Liabilities
Notes	548,900,000	556,700,000	548,900,000
Level 2 | Fair value | 11.5% Senior Secured Second Lien Notes
Liabilities
Notes	473,200,000	609,900,000	473,200,000
Recurring | Fair value
Assets
Cash equivalents	31,264,000	43,301,000	31,264,000
Total assets	31,264,000	43,301,000	31,264,000
Liabilities
Acquisition-related contingent considerations		517,000
Total liabilities		517,000
Recurring | Level 1
Assets
Cash equivalents	31,264,000	43,301,000	31,264,000
Total assets	31,264,000	43,301,000	31,264,000
Recurring | Level 3
Liabilities
Acquisition-related contingent considerations		517,000
Total liabilities		$ 517,000