LONG-TERM DEBT AND LEASE OBLIGATIONS (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 Lender		Dec. 31, 2012		Apr. 05, 2012
Long-term debt and lease obligations [Abstract]
Credit agreement	$ 0	[1]	$ 37,500,000	[1]
Long term debt and capital lease obligations	35,925,000		73,527,000
Less current maturities	(415,000)		(412,000)
Long-term debt and lease obligations	35,510,000		73,115,000
Sale and a leaseback of several facilities, Date	2001-12-28
Lease expiration date	Dec. 31, 2016
Scheduled maturities of long-term debt and lease obligations [Abstract]
2013	415,000
2014	443,000
2015	480,000
2016	10,302,000
2017	763,000
Thereafter	23,522,000
Long term debt and capital lease obligations	35,925,000		73,527,000
Credit Agreement [Member]
Long-term debt and lease obligations [Abstract]
Number of lenders led by Bank of America	4
Maximum borrowing capacity of credit facility					85,000,000
Expiration date of credit facility	Apr. 05, 2015
Maximum aggregate amount to increase under the credit facility	50,000,000
Maturity period of credit facility	36 months
Variable rate of debt instrument	prime rate
Federal Funds rate plus, variable rate (in hundredths)	0.50%
LIBOR rate plus, variable rate (in hundredths)	1.00%
Interest rate of credit facility (in hundredths)	4.50%
Amount outstanding under letter of credit	5,300,000
Outstanding amount of credit facility	0		37,500,000
Old Credit Agreement [Member]
Long-term debt and lease obligations [Abstract]
Maximum borrowing capacity of credit facility					115,000,000
Expiration date of credit facility	Dec. 01, 2012
Swing Line [Member]
Long-term debt and lease obligations [Abstract]
Maximum borrowing capacity of credit facility					5,000,000
Letter of Credit [Member]
Long-term debt and lease obligations [Abstract]
Maximum borrowing capacity of credit facility					25,000,000
Minimum [Member]
Long-term debt and lease obligations [Abstract]
Interest rate of credit facility (in hundredths)	1.25%
Maximum [Member]
Long-term debt and lease obligations [Abstract]
Interest rate of credit facility (in hundredths)	2.75%
Finance Obligation [Member]
Long-term debt and lease obligations [Abstract]
Capital lease and finance obligation	9,672,000	[2]	9,672,000	[2]
Capital Lease-Property (with a rate of 8.0%) [Member]
Long-term debt and lease obligations [Abstract]
Capital lease and finance obligation	26,247,000	[3]	26,344,000	[3]
Interest rate of debt instrument (in hundredths)	8.00%
Capital Leases-Equipment (with rates ranging from 5.0% to 8.5%) [Member]
Long-term debt and lease obligations [Abstract]
Capital lease and finance obligation	$ 6,000		$ 11,000
Interest rate of debt instrument, minimum (in hundredths)	5.00%
Interest rate of debt instrument, maximum (in hundredths)	8.50%

[1] On April 5, 2012, the Company, as borrower, and certain of its wholly-owned subsidiaries, as guarantors, entered into a secured revolving credit agreement (the "Credit Agreement") with a syndicate of four lenders led by Bank of America, N.A., as administrative agent, swing line lender and letter of credit issuer, for an aggregate principal amount of up to $85 million. The Credit Agreement replaces the Company's prior $115 million Credit Facility with Bank of America, N.A. and other lenders, which was due to expire on December 1, 2012. The old Credit Agreement (as defined below) was terminated concurrently with the effective date of the Credit Agreement. Under the Credit Agreement, the Company has the right to increase the aggregate amount available under the Credit Facility by up to $50 million upon satisfaction of certain conditions. The Credit Facility may be used to finance capital expenditures and permitted acquisitions, to pay transaction expenses, for the issuance of letters of credit and for general corporate purposes. The Credit Agreement includes a $5 million swing line sublimit and a $25 million letter of credit sublimit. Borrowings under the Credit Facility are secured by a first priority lien on substantially all of the tangible and intangible assets of the Company and its subsidiaries exclusive of real estate. The term of the Credit Facility is 36 months, maturing on April 5, 2015. Amounts borrowed as revolving loans under the Credit Facility will bear interest, at the Company's option, at either (i) an interest rate based on LIBOR and adjusted for any reserve percentage obligations under Federal Reserve Bank regulations (the "Eurodollar Rate") for specified interest periods or (ii) the Base Rate (as defined in the Credit Agreement), in each case, plus an applicable margin rate as determined under the Credit Agreement. The "Base Rate", as defined under the Credit Agreement, is the highest of (a) the prime rate, (b) the Federal Funds rate plus 0.50% and (c) a daily rate equal to the one-month LIBOR rate plus 1.0%. Under the Credit Agreement, the margin interest rate is subject to adjustment within a range of 1.25% to 2.75% based upon changes in the Company's consolidated leverage ratio and depending on whether the Company has chosen the Eurodollar Rate or the Base Rate option. Swing line loans will bear interest at the Base Rate plus the applicable margin rate. Letters of credit will require a fee equal to the applicable margin rate multiplied by the daily amount available to be drawn under each issued letter of credit plus an agreed upon fronting fee and customary issuance, presentation, amendment and other processing fees associated with letters of credit. At March 31, 2013, the Company had outstanding letters of credit aggregating $5.3 million, which were primarily comprised of letters of credit for the Department of Education, or DOE, matters and real estate leases. The Credit Agreement contains customary representations, warranties and covenants including consolidated adjusted net worth, consolidated leverage ratio, consolidated fixed charge coverage ratio, minimum financial responsibility composite score, cohort default rate and other financial covenants, certain restrictions on capital expenditures as well as affirmative and negative covenants and events of default customary for facilities of this type. In addition, the Company is paying fees to the lenders that are customary for facilities of this type. As of March 31, 2013, the Company is in compliance with all financial covenants. As of March 31, 2013, the Company had no amounts outstanding under the Credit Agreement. As of December 31, 2012, the Company had $37.5 million outstanding under the Credit Agreement. The interest rate on the borrowings was 4.5%. Amounts outstanding under the Credit Agreement were repaid on January 3, 2013.

[2] The Company completed a sale and a leaseback of several facilities on December 28, 2001. The Company retains a continuing involvement in the lease and, as a result, it is prohibited from utilizing sale-leaseback accounting. Accordingly, the Company has treated this transaction as a finance lease. The lease expires on December 31, 2016.

[3] In 2009, the Company assumed real estate capital leases in Fern Park, Florida and Hartford, Connecticut. These leases bear interest at 8% and expire in 2032 and 2031, respectively.