Restructuring Narrative (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 951,000	$ 317,000	$ 2,568,000	$ 5,431,000	$ 3,459,000	$ 6,818,000	$ 4,068,000	$ 4,894,000	$ 9,267,000	$ 19,239,000	$ 17,000
March 2015 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges									7,300,000	13,300,000
Restructuring cost incurred to date	20,600,000								20,600,000
September 2015 Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring charges									2,000,000	5,900,000
Restructuring cost incurred to date	7,900,000								7,900,000
Total expected restructuring cost	8,000,000								8,000,000
Prior Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges									0
Maximum
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost	$ 21,000,000								$ 21,000,000
Maximum | Prior Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges										$ 100,000	$ 100,000