Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Income Statement [Abstract]
Sales	$ 1,386,778	$ 800,414	$ 687,787
Cost of sales	1,008,479	565,279	456,389
Gross profit	378,299	235,135	231,398
Operating expenses:
Selling, general and administrative expenses	153,291	102,530	90,602
Research, development and engineering costs, net	55,001	52,995	49,845
Other operating expenses, net	61,737	66,464	15,297
Total operating expenses	270,029	221,989	155,744
Operating income	108,270	13,146	75,654
Interest expense	111,270	33,513	4,252
(Gain) loss on cost and equity method investments, net	833	(3,350)	(4,370)
Other income, net	(5,018)	(1,317)	(807)
Income (loss) before provision (benefit) for income taxes	1,185	(15,700)	76,579
Provision (benefit) for income taxes	(4,776)	(8,106)	21,121
Net income (loss)	$ 5,961	$ (7,594)	$ 55,458
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.19	$ (0.29)	$ 2.23
Diluted (in dollars per share)	$ 0.19	$ (0.29)	$ 2.14
Weighted average shares outstanding:
Basic (in shares)	30,778	26,363	24,825
Diluted (in shares)	30,973	26,363	25,975
Comprehensive Income (Loss)
Net income (loss)	$ 5,961	$ (7,594)	$ 55,458
Foreign currency translation loss	(19,269)	(7,841)	(3,502)
Net change in cash flow hedges, net of tax	2,478	108	(1,359)
Defined benefit plan liability adjustment, net of tax	(579)	(20)	(374)
Other comprehensive loss, net	(17,370)	(7,753)	(5,235)
Comprehensive income (loss)	$ (11,409)	$ (15,347)	$ 50,223