Subsequent Events - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Jul. 31, 2019	Dec. 31, 2018	Aug. 08, 2019	Jun. 30, 2019	Mar. 31, 2019
Subsequent Event [Line Items]
Claims subject to Appellate Court decision				$ 260.0	$ 260.0
Settlement Agreements
Subsequent Event [Line Items]
Settlement agreement, amount claimants agreed to pay		$ 16.4
Subsequent Event
Subsequent Event [Line Items]
Claims subject to Appellate Court decision			$ 240.0
Subsequent Event | Settlement Agreements
Subsequent Event [Line Items]
Settlement agreement, amount claimants agreed to pay	$ 13.5