Restructuring and Reorganization Charges (Details Textual) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Employees	Jun. 30, 2015 USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring and reorganization charges recorded during the period	$ 5,325		$ 370	$ (416)	$ 976
Reduced workforce | Employees				50
Gain on disposition of business operations				$ 6,611
Cyber Security Business
Restructuring Cost And Reserve [Line Items]
Gain on disposition of business operations		$ 6,600
Employee Severance
Restructuring Cost And Reserve [Line Items]
Restructuring and reorganization charges recorded during the period				$ 6,000