Business Overview and Summary of Significant Accounting Polices - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands, shares in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Provisional expense from revaluation in deferred tax asset due to TCJA	$ 59,500
Antidilutive securities excluded from computation of earnings per share	6.7	8.2	10.0	66.1
Operating lease, liability		$ 10,302
Right-of-use asset		8,105
Other liabilities, noncurrent	$ 2,119	$ 9,965
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, liability					$ 8,400
Right-of-use asset					8,400
Other liabilities, noncurrent					$ 10,500
Leasehold Improvements | Minimum
Lessee, Lease, Description [Line Items]
Property, plant and equipment, useful life		7 years
Leasehold Improvements | Maximum
Lessee, Lease, Description [Line Items]
Property, plant and equipment, useful life		10 years
Computer Equipment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, useful life		5 years
Machinery and Equipment | Minimum
Lessee, Lease, Description [Line Items]
Property, plant and equipment, useful life		5 years
Machinery and Equipment | Maximum
Lessee, Lease, Description [Line Items]
Property, plant and equipment, useful life		10 years
Furniture and Fixtures
Lessee, Lease, Description [Line Items]
Property, plant and equipment, useful life		10 years