Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 30, 2012	Apr. 01, 2011	Dec. 30, 2011
Segment Reporting Information [Line Items]
Segment revenue	$ 502,267	$ 384,293
Operating income (loss)	113,135	77,813
Accounts receivable	324,663		275,201
Inventories	224,656		232,063
Goodwill	1,379,353		1,297,692
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Segment revenue	248,885	190,034
Operating income (loss)	40,077	22,779
Accounts receivable	179,993		160,218
Inventories	127,630		128,433
Goodwill	775,697		697,237
Field Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	147,499	123,053
Operating income (loss)	62,361	52,505
Accounts receivable	91,826		63,542
Inventories	45,156		51,756
Goodwill	68,987		68,268
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	78,383	44,421
Operating income (loss)	7,358	(1,334)
Accounts receivable	34,745		36,465
Inventories	32,034		31,262
Goodwill	510,387		508,260
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Segment revenue	27,500	26,785
Operating income (loss)	3,339	3,863
Accounts receivable	18,099		14,976
Inventories	19,836		20,612
Goodwill	$ 24,282		$ 23,927
Maximum percentage of operation accounts for Company's total revenue, operating income, and assets	10.00%

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph l

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details