Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 04, 2014	Jun. 28, 2013	Jul. 04, 2014	Jun. 28, 2013	Jan. 03, 2014
Segment Reporting Information [Line Items]
Revenues	$ 642,199	$ 576,293	$ 1,246,920	$ 1,132,404
Consolidated segment operating income	97,134	64,905	172,845	121,362
Depreciation expense			15,621	12,854
Accounts receivable	379,811		379,811		337,932
Inventories	274,371		274,371		254,311
Goodwill	1,997,783		1,997,783		1,989,470
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Revenues	368,072	313,446	677,348	580,317
Accounts receivable	222,590		222,590		185,634
Inventories	178,480		178,480		171,863
Goodwill	1,084,672		1,084,672		1,080,240
Field Solutions [Member]
Segment Reporting Information [Line Items]
Revenues	114,456	115,864	252,621	263,345
Accounts receivable	65,894		65,894		62,859
Inventories	50,286		50,286		39,554
Goodwill	88,476		88,476		88,651
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Revenues	122,880	115,524	241,508	225,688
Accounts receivable	68,314		68,314		70,174
Inventories	29,980		29,980		27,664
Goodwill	800,168		800,168		796,094
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Revenues	36,791	31,459	75,443	63,054
Accounts receivable	23,013		23,013		19,265
Inventories	15,625		15,625		15,230
Goodwill	24,467		24,467		24,485
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	163,024	132,161	301,322	252,718
Depreciation expense	4,810	4,581	9,531	8,859
Operating Segments [Member] | Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	91,884	66,840	149,399	109,813
Depreciation expense	3,173	2,880	6,330	5,848
Operating Segments [Member] | Field Solutions [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	38,672	43,372	91,609	102,898
Depreciation expense	191	153	354	287
Operating Segments [Member] | Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	20,385	15,435	36,555	27,008
Depreciation expense	1,288	1,358	2,510	2,337
Operating Segments [Member] | Advanced Devices [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	12,083	6,514	23,759	12,999
Depreciation expense	$ 158	$ 190	$ 337	$ 387