Property, plant and equipment, net - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 24, 2022	Jun. 25, 2021
Property, Plant and Equipment [Line Items]
Cost	$ 552,538	$ 471,349
Less: Accumulated depreciation	(259,688)	(229,414)
Less: Impairment reserve	(573)	(806)
Net book value	292,277	241,129
Land and Land Improvements
Property, Plant and Equipment [Line Items]
Cost	58,489	45,125
Less: Accumulated depreciation	(35)	(26)
Less: Impairment reserve	0	0
Net book value	58,454	45,099
Building and Building Improvements
Property, Plant and Equipment [Line Items]
Cost	201,403	163,375
Less: Accumulated depreciation	(65,943)	(58,791)
Less: Impairment reserve	0	0
Net book value	135,460	104,584
Manufacturing Equipment
Property, Plant and Equipment [Line Items]
Cost	255,972	213,981
Less: Accumulated depreciation	(171,870)	(141,997)
Less: Impairment reserve	(573)	(804)
Net book value	83,529	71,180
Office Equipment
Property, Plant and Equipment [Line Items]
Cost	6,330	9,243
Less: Accumulated depreciation	(5,273)	(6,376)
Less: Impairment reserve	0	0
Net book value	1,057	2,867
Motor Vehicles
Property, Plant and Equipment [Line Items]
Cost	1,053	627
Less: Accumulated depreciation	(830)	(509)
Less: Impairment reserve	0	0
Net book value	223	118
Computers
Property, Plant and Equipment [Line Items]
Cost	21,329	29,621
Less: Accumulated depreciation	(15,737)	(21,715)
Less: Impairment reserve	0	(2)
Net book value	5,592	7,904
Construction and Machinery Under Installation
Property, Plant and Equipment [Line Items]
Cost	7,962	9,377
Less: Accumulated depreciation	0	0
Less: Impairment reserve	0	0
Net book value	$ 7,962	$ 9,377