Commitments and Contingencies Legal Matters (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Settled Litigation
Loss Contingencies [Line Items]
Litigation settlement amount	$ 4.3	$ 8.3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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