Commitments and Contingencies (Details 2) (USD $)	6 Months Ended
	Jun. 30, 2014
Restructuring activities
Cumulative restructuring costs incurred	$ 17,600,000
Commercial
Restructuring activities
Restructuring costs incurred for the period	700,000
Cumulative restructuring costs incurred	5,400,000
Public Sector
Restructuring activities
Restructuring costs incurred for the period	1,500,000
Cumulative restructuring costs incurred	8,300,000
Corporate
Restructuring activities
Restructuring costs incurred for the period	100,000
Cumulative restructuring costs incurred	3,900,000
Employee termination
Restructuring activities
Restructuring costs incurred for the period	1,100,000
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	12,469,000
Additions	1,514,000
Payments	(3,945,000)
Liability released	(397,000)
Liability for employee termination costs at end of the period	9,641,000
Employee termination | Commercial
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	4,744,000
Additions	738,000
Payments	(168,000)
Liability for employee termination costs at end of the period	5,314,000
Employee termination | Public Sector
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	4,296,000
Additions	653,000
Payments	(1,813,000)
Liability released	(377,000)
Liability for employee termination costs at end of the period	2,759,000
Employee termination | Corporate
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	3,429,000
Additions	123,000
Payments	(1,964,000)
Liability released	(20,000)
Liability for employee termination costs at end of the period	1,568,000
Lease termination and exit costs
Restructuring activities
Restructuring costs incurred for the period	1,200,000
Lease termination and exit costs | Commercial
Restructuring activities
Anticipated additional restructuring costs	$ 1,000,000