Property, plant and equipment, net - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 24, 2022
Property, Plant and Equipment [Line Items]
Cost	$ 597,697	$ 552,538
Less: Accumulated depreciation	(286,774)	(259,688)
Less: Impairment reserve	(573)	(573)
Net book value	310,350	292,277
Land and Land Improvements
Property, Plant and Equipment [Line Items]
Cost	60,424	58,489
Less: Accumulated depreciation	(71)	(35)
Less: Impairment reserve	0	0
Net book value	60,353	58,454
Building and Building Improvements
Property, Plant and Equipment [Line Items]
Cost	200,039	201,403
Less: Accumulated depreciation	(73,558)	(65,943)
Less: Impairment reserve	0	0
Net book value	126,481	135,460
Manufacturing Equipment
Property, Plant and Equipment [Line Items]
Cost	289,390	255,972
Less: Accumulated depreciation	(189,284)	(171,870)
Less: Impairment reserve	(573)	(573)
Net book value	99,533	83,529
Office Equipment
Property, Plant and Equipment [Line Items]
Cost	6,362	6,330
Less: Accumulated depreciation	(5,136)	(5,273)
Less: Impairment reserve	0	0
Net book value	1,226	1,057
Motor Vehicles
Property, Plant and Equipment [Line Items]
Cost	1,081	1,053
Less: Accumulated depreciation	(852)	(830)
Less: Impairment reserve	0	0
Net book value	229	223
Computers
Property, Plant and Equipment [Line Items]
Cost	24,951	21,329
Less: Accumulated depreciation	(17,873)	(15,737)
Less: Impairment reserve	0	0
Net book value	7,078	5,592
Construction and Machinery Under Installation
Property, Plant and Equipment [Line Items]
Cost	15,450	7,962
Less: Accumulated depreciation	0	0
Less: Impairment reserve	0	0
Net book value	$ 15,450	$ 7,962