Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 7,813	$ 0
Total COGS and SGA
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	8,403
Surveillance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	4,118
Instruments
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	3,524
OEM & Emerging Markets
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	167
Maritime
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	(141)
Security
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0
Detection
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	615
Other
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 120