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Commitments and Contingencies Commitments and Contingencies - Contingencies and Litigation (Details) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2018 USD ($)
Litigation Settlement, Amount Awarded from Other Party | $ 2.0

X
- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedFromOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration