Goodwill and intangible assets Textuals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Dec. 31, 2016	Jan. 02, 2016	Jul. 02, 2016
Finite-Lived Intangible Assets [Line Items]
Weighted average life of intangible assets	7 years
Intangible asset amortization expense	$ 9,800	$ 1,700	$ 11,759	$ 4,034
TS Business | Disposal Group, Held-for-sale, Not Discontinued Operations
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 49,616		$ 49,616		$ 55,826