Acquisitions - Net Purchase Price and Fair Values of Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands	May 27, 2021	Dec. 30, 2020	Oct. 01, 2021	Jul. 02, 2021
Estimated fair value of tangible assets acquired and liabilities assumed
Goodwill			$ 805,315	$ 804,906
Pentek
Business Combination, Consideration Transferred [Abstract]
Cash paid at closing	$ 65,668
Less cash acquired	(746)
Net purchase price	64,922
Estimated fair value of tangible assets acquired and liabilities assumed
Cash	746
Accounts receivable	1,370
Inventory	6,575
Fixed assets	152
Other current and non-current assets	2,864
Accounts payable	(1,016)
Accrued expenses	(520)
Other current and non-current liabilities	(4,090)
Estimated fair value of net tangible assets acquired	6,081
Estimated fair value of identifiable intangible assets	24,110
Goodwill	35,477
Estimated fair value of net assets acquired	$ 65,668
Physical Optics Corporation
Business Combination, Consideration Transferred [Abstract]
Cash paid at closing		$ 251,229
Cash paid post closing		61,626
Working capital and net debt adjustment		(2,096)
Less cash acquired		(2,855)
Net purchase price		307,904
Estimated fair value of tangible assets acquired and liabilities assumed
Cash		2,855
Accounts receivable		28,022
Inventory		11,125
Fixed assets		23,236
Other current and non-current assets		16,453
Accounts payable		(3,777)
Accrued expenses		(5,572)
Other current and non-current liabilities		(32,999)
Estimated fair value of net tangible assets acquired		39,343
Estimated fair value of identifiable intangible assets		116,000
Goodwill		155,416
Estimated fair value of net assets acquired		$ 310,759