Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012	Dec. 28, 2012
Segment Reporting Information [Line Items]
Segment revenue	$ 556,502	$ 504,763	$ 1,688,906	$ 1,524,590
Operating income	128,557	118,374	381,275	347,142
Depreciation expense	4,380	3,711	13,239	10,998
Accounts receivable	361,556		361,556		323,477
Inventories	241,509		241,509		240,529
Goodwill	1,938,870		1,938,870		1,815,699
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Segment revenue	310,611	287,244	890,928	820,304
Operating income	73,488	68,451	183,301	168,001
Depreciation expense	2,990	2,586	8,838	7,663
Accounts receivable	198,499		198,499		171,580
Inventories	165,526		165,526		148,241
Goodwill	1,040,906		1,040,906		958,103
Field Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	99,466	102,993	362,811	373,863
Operating income	31,373	36,021	134,271	145,005
Depreciation expense	139	127	426	383
Accounts receivable	69,240		69,240		71,465
Inventories	34,692		34,692		44,738
Goodwill	78,715		78,715		68,684
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	113,570	83,830	339,258	243,615
Operating income	15,276	8,218	42,284	21,200
Depreciation expense	1,056	792	3,393	2,301
Accounts receivable	71,949		71,949		59,720
Inventories	26,315		26,315		30,598
Goodwill	794,303		794,303		763,386
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Segment revenue	32,855	30,696	95,909	86,808
Operating income	8,420	5,684	21,419	12,936
Depreciation expense	195	206	582	651
Accounts receivable	21,868		21,868		20,712
Inventories	14,976		14,976		16,952
Goodwill	$ 24,946		$ 24,946		$ 25,526