GOODWILL AND LONG-LIVED ASSETS (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($) Campus	Sep. 30, 2015 USD ($) Campus	Sep. 30, 2014 USD ($) Campus	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
GOODWILL AND LONG-LIVED ASSETS [Abstract]
Number of reporting units impaired | Campus		10	1	6
Impairment of long-lived assets			$ 0
Long lived asset impairment pre-tax charges of leasehold				$ 1,900
Long lived impairment pre-tax charges of intangible assets				500
Changes in carrying amount of goodwill [Abstract]
Gross Goodwill Balance		$ 117,176		117,176	$ 115,872	$ 115,872	$ 117,176
Accumulated Impairment Losses		(93,665)		(93,665)	(93,881)	(93,665)	(54,711)
Net Goodwill Balance		23,511		23,511	21,991	22,207	$ 62,465
Goodwill impairment	$ 200	39,000	(216)	(38,954)
Finite-Lived Intangible Assets [Line Items]
Amortization	100	100	100	100
Net carrying amount	79		79
Intangible Assets (Excluding Goodwill) [Abstract]
Gross carrying amount, Total			1,922
Adjustments			0
Gross carrying amount, Total	1,922		1,922
Accumulated amortization, Total			733
Amortization			48
Accumulated amortization, Total	781		781
Net carrying amount					1,141
Amortization of intangible assets	100	$ 100	100	$ 100
Estimated future amortization expense [Abstract]
Remainder of 2015					16
2016					22
2017					20
2018					20
2019					1
Thereafter					0
Total	79		79		79
Accreditation [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount, beginning balance			1,062
Adjustments			0
Gross carrying amount, ending balance	1,062		1,062
Accumulated amortization, beginning balance			0
Amortization			0
Accumulated amortization, ending balance	0		0
Net carrying amount	1,062		1,062		1,062	$ 1,062
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, beginning balance			310
Adjustments			0
Gross carrying amount, ending balance	310		310
Accumulated amortization, beginning balance			264
Amortization			33
Accumulated amortization, ending balance	297		297
Net carrying amount	13		$ 13
Weighted average amortization period			7 years
Intangible Assets (Excluding Goodwill) [Abstract]
Amortization of intangible assets			$ 33
Estimated future amortization expense [Abstract]
Total	13		13		13
Curriculum [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, beginning balance			550
Adjustments			0
Gross carrying amount, ending balance	550		550
Accumulated amortization, beginning balance			469
Amortization			15
Accumulated amortization, ending balance	484		484
Net carrying amount	66		$ 66
Weighted average amortization period			10 years
Intangible Assets (Excluding Goodwill) [Abstract]
Amortization of intangible assets			$ 15
Estimated future amortization expense [Abstract]
Total	$ 66		$ 66		$ 66