SUBSEQUENT EVENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			12 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Seven Campuses [Member]	Dec. 31, 2011 Seven Campuses [Member]	Dec. 31, 2010 Seven Campuses [Member]	Dec. 31, 2009 Seven Campuses [Member]	Jun. 30, 2012 Subsequent Event [Member]
Subsequent Event [Line Items]
Number of campuses at which operations will be ceased									7
Results of operations [Abstract]
Revenue	$ 100,365	$ 128,224	$ 205,236	$ 273,582	$ 7,047	$ 20,803	$ 34,733	$ 25,790
Operating expenses					(19,944)	(26,063)	(27,075)	(17,497)
OPERATING (LOSS) INCOME	(28,094)	9,338	(32,187)	27,814	(12,897)	(5,260)	7,658	8,293
(Benefit) provision for income taxes	(8,431)	3,324	(10,775)	10,360
Impairments of goodwill and long-lived assets	$ 23,683	$ 0	$ 23,683	$ 0	$ 9,400	$ 2,100	$ 1,400