Commitments and Contingencies (Details 2) (USD $)	9 Months Ended
	Sep. 30, 2014
Restructuring activities
Cumulative restructuring costs incurred	$ 17,800,000
Commercial
Restructuring activities
Restructuring costs incurred for the period	1,600,000
Cumulative restructuring costs incurred	6,300,000
Public Sector
Restructuring activities
Restructuring costs incurred for the period	800,000
Cumulative restructuring costs incurred	7,600,000
Corporate
Restructuring activities
Restructuring costs incurred for the period	100,000
Cumulative restructuring costs incurred	3,900,000
Employee termination costs
Restructuring activities
Restructuring costs incurred for the period	1,200,000
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	12,469,000
Additions	1,732,000
Payments	(7,929,000)
Liability released	(562,000)
Liability for employee termination costs at end of the period	5,710,000
Employee termination costs | Commercial
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	4,744,000
Additions	840,000
Payments	(2,205,000)
Liability released	(12,000)
Liability for employee termination costs at end of the period	3,367,000
Employee termination costs | Public Sector
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	4,296,000
Additions	767,000
Payments	(3,421,000)
Liability released	(530,000)
Liability for employee termination costs at end of the period	1,112,000
Employee termination costs | Corporate
Activity related to restructuring liabilities
Liability for employee termination costs at beginning of the period	3,429,000
Additions	125,000
Payments	(2,303,000)
Liability released	(20,000)
Liability for employee termination costs at end of the period	1,231,000
Lease termination and exit costs
Restructuring activities
Restructuring costs incurred for the period	$ 1,300,000