Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Significant Accounting Policies [Line Items]
Allowance for Doubtful Accounts Receivable, Current	$ 13,182	$ 12,600	$ 13,182	$ 12,600
Depreciation			29,700	26,200	$ 25,500
Finite-Lived Intangible Assets, Amortization Expense	38,600	29,900			27,400
Foreign Currency Transaction Gain (Loss), before Tax			2,400	1,900	(6,800)
Costs in Excess of Billings on Uncompleted Contracts or Programs	19,500	$ 12,200	19,500	12,200
Research and Development Expense			29,100	26,300	22,400
Share-based Compensation			6,237	27,905	15,864
Tax benefit			2,400	$ 10,500	$ 6,000
Total unrecognized compensation	$ 6,800		$ 6,800
Weighted average life			1 year 73 days
Weighted average number diluted shares outstanding (shares)			4,000	55,000	22,000
Interest Paid			$ 25,900	$ 21,000	$ 14,800
Income Taxes Paid			$ 123,300	$ 89,000	$ 94,600
Restricted Stock [Member]
Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross			76,788	382,125
Fair value of grants issued during the period			$ 10,500	$ 36,000
Grant awards issued (shares)			76,788	382,125
Grant awards, fair value per share at date of grant (usd per share)			$ 136.29	$ 94.19