COSTS ASSOCIATED WITH EXIT OR DISPOSAL ACTIVITIES AND DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended		6 Months Ended						3 Months Ended	6 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 18, 2013 Campus	Jul. 31, 2012 Campus	Jun. 18, 2013 Ohio [Member] Campus	Jun. 18, 2013 Kentucky [Member] Campus	Jun. 30, 2013 Five Campuses [Member]	Jun. 30, 2013 Five Campuses [Member]	Dec. 31, 2012 Five Campuses [Member]	Jun. 30, 2013 Exit or Disposal Activities [Member]	Jun. 30, 2013 Exit or Disposal Activities [Member]	Dec. 31, 2012 Exit or Disposal Activities [Member]	Dec. 31, 2011 Exit or Disposal Activities [Member]	Dec. 31, 2010 Exit or Disposal Activities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of campuses					5	7	4	1
Costs Associated with Exit or Disposal Activities [Abstract]
Revenue	$ 85,217,000	$ 97,031,000	$ 175,300,000	$ 198,189,000								$ 3,466,000	$ 7,278,000	$ 19,924,000	$ 35,099,000	$ 61,028,000
Operating expenses												(7,942,000)	(15,424,000)	(33,564,000)	(29,885,000)	(31,947,000)
OPERATING LOSS	(14,382,000)	(16,661,000)	(25,456,000)	(19,292,000)								(4,476,000)	(8,146,000)	(13,640,000)	5,214,000	29,081,000
Impairment of goodwill and long-lived assets									700,000	2,300,000	8,700,000
Compensation related to severance	1,019,000		1,019,000
Result of discontinued operations [Abstract]
Revenue		3,334,000		7,047,000
Loss before income taxes		(11,433,000)		(12,896,000)
Income tax benefit		(4,563,000)		(5,147,000)
Net loss from discontinued operations	$ 0	$ (6,870,000)	$ 0	$ (7,749,000)