Commitments and Contingencies Commitment and Contingencies (Details) $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Litigation Settlement, Amount	$ 12.8

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration