SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Contract Receivables, Net [Abstract]
Billed receivables	$ 29,242,000	$ 25,821,000
Other unbilled receivables, non-current, included above	500,000	500,000
Prepaid Expense and Other Current Assets [Abstract]
Restricted cash	251,000	240,000
Other	3,999,000	2,326,000
Prepaid expenses and other assets	4,250,000	2,566,000
Property and Equipment [Line Items]
Property and equipment	32,549,000	32,380,000
Less accumulated depreciation	(18,898,000)	(17,115,000)
Property and equipment, net	13,651,000	15,265,000
Other Noncurrent Assets [Abstract]
Deferred compensation plan investments	1,374,000	1,395,000
Equity investments	914,000	1,038,000
Other	1,686,000	1,879,000
Other noncurrent assets	3,974,000	4,312,000
Accrued compensation and employee benefits [Abstract]
Accrued vacation	6,778,000	6,036,000
Accrued compensation and related taxes	6,224,000	11,601,000
Accrued pension liability	5,122,000	5,480,000
Other employee related benefits	1,959,000	1,785,000
Accrued compensation and employee benefits	20,083,000	24,902,000
Other Accrued Expenses [Abstract]
Accrued interest	193,000	1,525,000
Deferred rent liability	1,136,000	554,000
Deferred gain on sale of building	676,000	676,000
Net working capital payment accrual	0	2,388,000
Other	3,240,000	3,413,000
Other accrued expenses	5,245,000	8,556,000
Other long-term liabilities
Accrued pension liability	21,743,000	21,576,000
Deferred rent liability	6,068,000	6,610,000
Deferred gain on sale of building	1,690,000	2,028,000
Deferred compensation plan liabilities	1,374,000	1,395,000
Other	970,000	1,457,000
Other long-term liabilities	31,845,000	33,066,000
Software [Member]
Property and Equipment [Line Items]
Property and equipment	11,338,000	11,334,000
Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property and equipment	11,127,000	10,861,000
Furniture and Other Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	10,084,000	10,185,000
Contract Receivables, net [Member]
Contract Receivables, Net [Abstract]
Allowance for doubtful accounts	(985,000)	(866,000)
Contract receivables, net	64,072,000	66,466,000
Contract Receivables, net [Member] | Unbilled Revenues [Member]
Contract Receivables, Net [Abstract]
Revenues recorded in excess of milestone billings on fixed price contracts with state and local government agencies	6,075,000	7,058,000
Retainage and fee withholdings, long term	573,000	518,000
Other unbilled receivables	29,167,000	33,935,000
Total unbilled receivables	35,815,000	41,511,000
Other unbilled receivables, non-current, included above		$ 200,000