DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
DISCONTINUED OPERATIONS [Abstract]
Number of campuses	7								7
Revenue									$ 8,500,000	$ 20,804,000	$ 34,732,000
(Loss) income before income tax									(22,142,000)	(5,260,000)	7,657,000
Income tax (benefit) expense									(8,837,000)	(1,685,000)	3,613,000
Net (loss) income from discontinued operations	(2,986,000)	(2,570,000)	(6,870,000)	(879,000)	(1,110,000)	(2,592,000)	(71,000)	198,000	(13,305,000)	(3,575,000)	4,044,000
Impairments of goodwill and long-lived assets									$ 9,500,000	$ 2,100,000	$ 1,400,000