Litigation (Details) $ in Thousands	Jan. 27, 2014 USD ($) defendant	Jul. 01, 2008 jury_trial defendant	Jun. 30, 2018 case	Apr. 17, 2018 USD ($)
Trial by Jury, State of Rhode Island
Loss Contingencies [Line Items]
Number of jury trials | jury_trial		2
Number of additional defendants | defendant		2
Santa Clara County, California Proceeding
Loss Contingencies [Line Items]
Number of additional defendants | defendant	2
Amount payable jointly and severally for litigation	$ 1,150,000
Abatement fund amount proposed by plaintiffs				$ 730,000
Maximum abatement amount proposed by defendants				$ 409,050
Personal Injury | Pending Litigation
Loss Contingencies [Line Items]
Number of pending cases | case			3