Reporting Segment And Geographic Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Segment Reporting Information [Line Items]
Revenue	$ 1,644,065	$ 1,293,937	$ 1,126,259
Operating income	327,506	247,536	194,348
Accounts receivable	275,201	222,820	202,293
Inventories	232,063	192,852	144,012
Goodwill	1,297,692	828,737	764,193
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Revenue	906,497	719,053	578,579
Operating income	149,015	110,965	58,282
Accounts receivable	160,218	131,808	118,033
Inventories	128,433	123,780	91,248
Goodwill	697,237	432,364	389,702
Field Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	413,721	318,137	291,752
Operating income	160,139	116,373	104,498
Accounts receivable	63,542	52,065	37,178
Inventories	51,756	33,964	22,025
Goodwill	68,268	26,211	26,776
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	218,540	154,254	154,881
Operating income	4,461	1,873	14,341
Accounts receivable	36,465	24,806	29,572
Inventories	31,262	16,721	16,826
Goodwill	508,260	348,166	333,265
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Revenue	105,307	102,493	101,047
Operating income	13,891	18,325	17,227
Accounts receivable	14,976	14,141	17,510
Inventories	20,612	18,387	13,913
Goodwill	$ 23,927	$ 21,996	$ 14,450
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

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-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.

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