Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2016		Jan. 01, 2016		Jan. 02, 2015
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 954		$ 1,411		$ 2,001
Charged to Costs & Expenses		140		(70)		98
Charged to Other Accounts	[1]	245		459	[2]	14	[2]
Deductions	[3]	(597)		(846)		(702)
Balance at End of Period		742		954		1,411
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		39,171		10,709		11,661
Charged to Costs & Expenses	[4]	641		788		(729)
Charged to Other Accounts	[1]	(5,135)		27,836	[2]	0
Deductions		714	[5]	(162)	[5]	(223)	[4]
Balance at End of Period		$ 35,391		$ 39,171		$ 10,709

[1] Includes foreign currency translation effect.

[2] Balance recorded as a part of our 2015 acquisition of Lake Region Medical and our 2014 acquisition of Centro de Construcción de Cardioestimuladores del Uruguay

[3] Accounts written off.

[4] Valuation allowance recorded in the provision for income taxes for certain net operating losses and tax credits. The net decrease in allowance in 2014 primarily relates to the use of net operating loss carryforwards.

[5] Primarily relates to return to provision adjustments for prior years.