Consolidated Statements of Net Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Dec. 27, 2014
Revenue, Net	$ 1,056,159	$ 867,864	$ 851,995
Cost of sales	643,042	537,365	527,567
Gross profit	413,117	330,499	324,428
Selling, general, and administrative expenses	206,129	153,714	146,975
Research and development expenses	42,198	30,802	31,122
Pension settlement expenses		29,928
Amortization of intangibles	19,337	11,898	12,501
Impairment of goodwill and intangible assets	14,809
Total operating expenses	282,473	226,342	190,598
Operating income	130,644	104,157	133,830
Interest expense	8,628	4,091	4,903
Foreign exchange (gain) loss	472	(1,465)	3,925
Other expense (income), net	(1,730)	(5,417)	(6,644)
Income before income taxes	123,274	106,948	131,646
Income taxes	18,786	26,082	33,546
Net income	$ 104,488	$ 80,866	$ 98,100
Income per share:
Basic (in dollars per share)	$ 4.63	$ 3.58	$ 4.35
Diluted (in dollars per share)	$ 4.60	$ 3.56	$ 4.32
Weighted-average shares and equivalent shares outstanding:
Basic (in shares)	22,559	22,565	22,543
Diluted (in shares)	22,727	22,719	22,727