Leases - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jul. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 114,204
Finance lease liabilities	23,718
Finisar Corporation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets	29,000
Operating lease liabilities	$ 29,000
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets		$ 80,100
Operating lease liabilities		80,100
Finance lease assets		25,000
Finance lease liabilities		$ 24,000