Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2014	Mar. 29, 2013	Jan. 03, 2014
Segment Reporting Information [Line Items]
Segment revenue	$ 604,721	$ 556,111
Operating Income	75,711	56,457
Depreciation expense	7,520	6,193
Accounts receivable	397,740		337,932
Inventories	266,700		254,311
Goodwill	1,990,457		1,989,470
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Segment revenue	309,276	266,871
Accounts receivable	212,770		185,634
Inventories	174,158		171,863
Goodwill	1,083,357		1,080,240
Field Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	138,165	147,481
Accounts receivable	86,554		62,859
Inventories	50,574		39,554
Goodwill	88,715		88,651
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	118,628	110,164
Accounts receivable	71,250		70,174
Inventories	26,416		27,664
Goodwill	794,433		796,094
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Segment revenue	38,652	31,595
Accounts receivable	27,166		19,265
Inventories	15,552		15,230
Goodwill	23,952		24,485
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income	138,298	120,557
Operating Segments [Member] | Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Operating Income	57,515	42,973
Operating Segments [Member] | Field Solutions [Member]
Segment Reporting Information [Line Items]
Operating Income	52,937	59,526
Operating Segments [Member] | Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Operating Income	16,170	11,573
Operating Segments [Member] | Advanced Devices [Member]
Segment Reporting Information [Line Items]
Operating Income	11,676	6,485
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Depreciation expense	4,722	4,278
Segment Reconciling Items [Member] | Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Depreciation expense	3,157	2,968
Segment Reconciling Items [Member] | Field Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation expense	164	134
Segment Reconciling Items [Member] | Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation expense	1,222	979
Segment Reconciling Items [Member] | Advanced Devices [Member]
Segment Reporting Information [Line Items]
Depreciation expense	$ 179	$ 197