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
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012	Dec. 28, 2012
Segment Reporting Information [Line Items]
Segment revenue	$ 576,293	$ 517,560	$ 1,132,404	$ 1,019,827
Operating income (loss)	132,161	115,633	252,718	228,768
Depreciation expense	4,581	3,721	8,859	7,288
Accounts receivable	356,264		356,264		323,477
Inventories	258,709		258,709		240,529
Goodwill	1,911,578		1,911,578		1,815,699
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Segment revenue	313,446	284,175	580,317	533,060
Operating income (loss)	66,840	59,473	109,813	99,550
Depreciation expense	2,880	2,578	5,848	5,078
Accounts receivable	201,541		201,541		171,580
Inventories	171,891		171,891		148,241
Goodwill	1,025,735		1,025,735		958,103
Field Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	115,864	123,371	263,345	270,870
Operating income (loss)	43,372	46,623	102,898	108,984
Depreciation expense	153	123	287	256
Accounts receivable	68,074		68,074		71,465
Inventories	43,521		43,521		44,738
Goodwill	68,294		68,294		68,684
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	115,524	81,402	225,688	159,785
Operating income (loss)	15,435	5,624	27,008	12,982
Depreciation expense	1,358	803	2,337	1,510
Accounts receivable	67,580		67,580		59,720
Inventories	26,444		26,444		30,598
Goodwill	792,865		792,865		763,386
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Segment revenue	31,459	28,612	63,054	56,112
Operating income (loss)	6,514	3,913	12,999	7,252
Depreciation expense	190	217	387	444
Accounts receivable	19,069		19,069		20,712
Inventories	16,853		16,853		16,952
Goodwill	$ 24,684		$ 24,684		$ 25,526