Leases - Schedule of Lease Costs, Including Short-Term Leases, Lease Term, and Discount Rates (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2020 USD ($)
Finance Lease Cost
Amortization of right-of-use assets	$ 1,667
Interest on lease liabilities	1,328
Total finance lease cost	2,995
Operating lease cost	32,466
Sublease income	368
Total lease cost	35,093
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash flows from finance leases	1,328
Operating cash flows from operating leases	30,816
Financing cash flows from finance leases	1,026
Assets Obtained in Exchange for Lease Liabilities [Abstract]
Right-of-use assets obtained in Finisar acquisition	29,247
Right-of-use assets obtained in exchange for new operating lease liabilities	29,458
Total assets obtained in exchange for new operating lease liabilities	$ 58,705
Weighted-Average Remaining Lease Term (in Years)
Finance leases	11 years 6 months
Operating leases	7 years 2 months 12 days
Weighted-Average Discount Rate
Finance leases	5.60%
Operating leases	7.30%