Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	$ 303,634		$ 303,634		$ 260,634
Accumulated amortization	(184,255)		(184,255)		(177,066)
Net Intangible Assets Subject to Amortization	119,379		119,379		83,568
Intangible assets, net	139,738		139,738		103,927
Amortization expense (excluding capitalized software)	3,690	3,796	7,289	7,565
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
2012	15,213		15,213
2013	15,272		15,272
2014	15,152		15,152
2015	15,085		15,085
2016	13,413		13,413
HiRel Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense (excluding capitalized software)	694		1,281
Portion of HiRel purchase price allocated to intangible assets	43,950		43,950
Patents and Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	113,938		113,938		111,428
Accumulated amortization	(90,026)		(90,026)		(89,379)
Capitalized Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	54,216		54,216		53,721
Accumulated amortization	(49,214)		(49,214)		(47,836)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	97,352		97,352		57,723
Accumulated amortization	(29,604)		(29,604)		(26,174)
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	36,428		36,428		36,762
Accumulated amortization	(15,159)		(15,159)		(13,615)
Intangible Assets Not Subject to Amortization (Indefinite-lived)	20,359		20,359		20,359
Non-competition Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Subject to Amortization	1,700		1,700		1,000
Accumulated amortization	$ (252)		$ (252)		$ (62)