Goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Disclosure - Goodwill - Additional Information [Abstract]

Carrying value of goodwill by reporting segment and the activity

The carrying value of goodwill by reporting segment and the activity for the two year period ending December 31, 2011 is as follows (in thousands):

	Thermal Vision and Measurement			Raymarine			Surveillance			Detection			Integrated Systems		Total
Balance, December 31, 2009	$	224,747		$	—		$	37,584		$	—		$	—	$	262,331
Goodwill from acquisitions	14,065			91,643			50,126			41,026			19,494		216,354
Currency translation adjustments	(2,627		)	5,623			292			—			—		3,288
Other activity	(4		)	—			50			—			—		46
Balance, December 31, 2010	236,181			97,266			88,052			41,026			19,494		482,019
Goodwill from acquisitions	16,452			1,440			—			—			—		17,892
Currency translation adjustments	(1,344		)	(610		)	(90		)	—			—		(2,044		)
Other activity	(102		)	268			2,539			(2,864		)	635		476
Balance, December 31, 2011	$	251,187		$	98,364		$	90,501		$	38,162		$	20,129	$	498,343