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, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Goodwill [Roll Forward]          
Balance as of December 31, 2013     $ 92,052,000    
Balance as of September 30, 2014 92,052,000   92,052,000    
Finite-Lived Intangible Assets [Line Items]          
Contract-related 93,304,000   93,304,000   93,304,000
Acquired technologies 12,400,000   12,400,000   12,400,000
Trade name - amortizable 10,100,000   10,100,000   10,100,000
Intangible assets, Total 115,804,000   115,804,000   115,804,000
Accumulated Amortization (40,145,000)   (40,145,000)   (32,522,000)
Accumulated Impairment Loss (1,025,000)   (1,025,000)   (1,025,000)
Net Intangible Assets 74,634,000   74,634,000   82,257,000
Amortization of Intangible Assets 2,500,000 2,500,000 7,600,000 7,600,000  
Contract-Related [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization (31,952,000)   (31,952,000)   (26,287,000)
Accumulated Impairment Loss (1,025,000)   (1,025,000)   (1,025,000)
Net Intangible Assets 60,327,000   60,327,000   65,992,000
Acquired Technologies [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization (3,742,000)   (3,742,000)   (2,896,000)
Accumulated Impairment Loss 0   0   0
Net Intangible Assets 8,658,000   8,658,000   9,504,000
Trade Names - Amortizable [Member]
         
Finite-Lived Intangible Assets [Line Items]          
Accumulated Amortization (4,451,000)   (4,451,000)   (3,339,000)
Accumulated Impairment Loss 0   0   0
Net Intangible Assets 5,649,000   5,649,000   6,761,000
Supply Chain Management Group [Member]
         
Goodwill [Roll Forward]          
Balance as of December 31, 2013         61,169,000
Balance as of September 30, 2014 61,169,000   61,169,000   61,169,000
IT, Energy and Management Consulting Group [Member]
         
Goodwill [Roll Forward]          
Balance as of December 31, 2013         30,883,000
Balance as of September 30, 2014 $ 30,883,000   $ 30,883,000   $ 30,883,000