Commitments and Contingencies - Legal Matters (Details) $ in Millions	12 Months Ended
Dec. 31, 2014 USD ($) item
Commitments and Contingencies.
Number of former employees who allege the Company engaged in anticompetitive activities \| item	2
Amount paid for settlement of claims \| $	$ 23.0

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