LONG-TERM DEBT AND LEASE OBLIGATIONS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Long-term debt and lease obligations [Abstract]
Long term debt and capital lease obligations	$ 73,527,000		$ 36,508,000
Less current maturities	(412,000)		(481,000)
Long-term debt and lease obligations	73,115,000		36,027,000
Sale and a leaseback of several facilities, Date	2001-12-28
Rent expense under finance lease	1,500,000		1,500,000		1,500,000
Lease expiration date	Dec. 31, 2016
Scheduled maturities of long-term debt and lease obligations [Abstract]
2013	412,000
2014	435,000
2015	37,971,000
2016	10,243,000
2017	748,000
Thereafter	23,718,000
Long term debt and capital lease obligations	73,527,000		36,508,000
Credit Agreement [Member]
Long-term debt and lease obligations [Abstract]
Credit agreement	37,500,000	[1]	0	[1]
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	1,600,000
Outstanding amount of credit facility	37,500,000
Old Credit Agreement [Member]
Long-term debt and lease obligations [Abstract]
Credit agreement	0	[2]	0	[2]
Maximum borrowing capacity of credit facility	115,000,000
Expiration date of credit facility	Dec. 01, 2012
Amount outstanding under letter of credit			1,600,000
Outstanding amount of credit facility			0
Letter of Credit [Member]
Long-term debt and lease obligations [Abstract]
Maximum borrowing capacity of credit facility	25,000,000
Swing Line [Member]
Long-term debt and lease obligations [Abstract]
Maximum borrowing capacity of credit facility	5,000,000
Minimum [Member] | Credit Agreement [Member]
Long-term debt and lease obligations [Abstract]
Interest rate of credit facility (in hundredths)	1.25%
Maximum [Member] | Credit Agreement [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	[3]	9,672,000	[3]
Capital Lease-Property (with a rate of 8.0%) [Member]
Long-term debt and lease obligations [Abstract]
Capital lease and finance obligation	26,344,000	[4]	26,715,000	[4]
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	$ 11,000		$ 121,000
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.

[2] The Company previously had a credit agreement (the "old Credit Agreement") with a syndicate of banks which was terminated on April 5, 2012. Under the terms of the agreement, the syndicate provided the Company with a $115 million credit facility. The old Credit Agreement permitted the issuance of up to $25 million in letter of credit, the amount of which reduces the availability of permitted borrowings under the agreement. At December 31, 2011, the Company had outstanding letters of credit aggregating $1.6 million, which were primarily comprised of letters of credit for the DOE matters and real estate leases.

[3] The Company completed a sale and a leaseback of several facilities on December 28, 2001. The Company retained 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. Rent payments under this obligation for the three years in the period ended December 31, 2012 were $1.5 million, respectively. These payments have been reflected in the accompanying consolidated statements of operations as interest expense for all periods presented since the effective interest rate on the obligation is greater than the scheduled payments. The lease expiration date is December 31, 2016.

[4] 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.