Intangible Assets (Change in Indefinite-lived Assets and Goodwill) (Details) $ in Thousands	12 Months Ended
	Jan. 01, 2016 USD ($)
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived intangible assets, beginning	$ 20,288
Indefinite-lived intangible assets, ending	90,288
Goodwill [Roll Forward]
Goodwill, beginning	354,393
Goodwill acquired	661,788
Foreign currency translation	(2,611)
Goodwill, ending	1,013,570
Greatbatch Medical [Member]
Goodwill [Roll Forward]
Goodwill, beginning	304,297
Goodwill acquired	0
Foreign currency translation	(368)
Goodwill, ending	303,929
QiG [Member]
Goodwill [Roll Forward]
Goodwill, beginning	50,096
Goodwill acquired	0
Foreign currency translation	0
Goodwill, ending	50,096
Lake Region Medical [Member]
Goodwill [Roll Forward]
Goodwill, beginning	0
Goodwill acquired	661,788
Foreign currency translation	(2,243)
Goodwill, ending	659,545
Trademarks and Trade Names [Member]
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived intangible assets, beginning	20,288
Indefinite-lived intangible assets acquired	70,000
Indefinite-lived intangible assets, ending	$ 90,288