Goodwill Goodwill (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 575,701
Currency translation adjustments	(179)
Goodwill, end of period	575,522
Instruments
Goodwill [Roll Forward]
Goodwill, beginning of period	163,995
Currency translation adjustments	(832)
Goodwill, end of period	163,163
OEM & Emerging Markets
Goodwill [Roll Forward]
Goodwill, beginning of period	92,166
Currency translation adjustments	(467)
Goodwill, end of period	91,699
Security
Goodwill [Roll Forward]
Goodwill, beginning of period	48,199
Currency translation adjustments	(244)
Goodwill, end of period	47,955
Maritime
Goodwill [Roll Forward]
Goodwill, beginning of period	114,419
Currency translation adjustments	1,553
Goodwill, end of period	115,972
Surveillance
Goodwill [Roll Forward]
Goodwill, beginning of period	108,693
Currency translation adjustments	(223)
Goodwill, end of period	108,470
Detection
Goodwill [Roll Forward]
Goodwill, beginning of period	48,229
Currency translation adjustments	34
Goodwill, end of period	$ 48,263