Restructuring expenses (Textuals) (Details) $ in Thousands	3 Months Ended
	Sep. 29, 2018 USD ($) employee	Jun. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of employee reductions under Severance charges | employee	50
Fiscal Year 2019 Restructuring Liabilities Member
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 7,533
Restructuring Reserve	5,503
Fiscal Year 2019 Restructuring Liabilities Member | Electronic Components
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	7,300
Fiscal Year 2019 Restructuring Liabilities Member | Premier Farnell
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	200
Fiscal Year 2018 And Prior Restructuring Liabilities Member
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 9,742	$ 29,224