Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details)

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Goodwill and Intangible Assets (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Goodwill [Roll Forward]          
Balance as of December 31, 2012     $ 92,052,000    
Balance as of September 30, 2013 92,052,000   92,052,000    
Finite-Lived Intangible Assets [Line Items]          
Contract-related 96,884,000   96,884,000   96,884,000
Acquired technologies 12,400,000   12,400,000   12,400,000
Trade name - amortizable 10,100,000   10,100,000   10,100,000
Trade names - indefinite lived 1,500,000   1,500,000   1,500,000
Intangible assets, Total 120,884,000   120,884,000   120,884,000
Accumulated Amortization (33,170,000)   (33,170,000)   (25,547,000)
Accumulated Impairment Loss (2,916,000)   (2,916,000)   (2,916,000)
Net Intangible Assets 84,798,000   84,798,000   92,421,000
Amortization of Intangible Assets 2,500,000 2,800,000 7,600,000 8,400,000  
Indefinite-lived Intangible Assets [Line Items]          
Trade names - indefinite lived 1,500,000   1,500,000   1,500,000
Contract-Related [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization (27,588,000)   (27,588,000)   (21,923,000)
Accumulated Impairment Loss (1,416,000)   (1,416,000)   (1,416,000)
Net Intangible Assets 67,880,000   67,880,000   73,545,000
Acquired Technologies [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization (2,615,000)   (2,615,000)   (1,769,000)
Accumulated Impairment Loss 0   0   0
Net Intangible Assets 9,785,000   9,785,000   10,631,000
Trade Names - Amortizable [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization (2,967,000)   (2,967,000)   (1,855,000)
Accumulated Impairment Loss 0   0   0
Net Intangible Assets 7,133,000   7,133,000   8,245,000
Trade names indefinite lived [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization 0   0   0
Accumulated Impairment Loss (1,500,000)   (1,500,000)   (1,500,000)
Net Intangible Assets 0   0   0
Supply Chain Management Group [Member]
         
Goodwill [Roll Forward]          
Balance as of December 31, 2012         61,169,000
Balance as of September 30, 2013 61,169,000   61,169,000   61,169,000
IT, Energy and Management Consulting Group [Member]
         
Goodwill [Roll Forward]          
Balance as of December 31, 2012         30,883,000
Balance as of September 30, 2013 $ 30,883,000   $ 30,883,000   $ 30,883,000