Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Pro Forma - New Accounting Pronouncement, Early Adoption, Effect $ in Millions |
Dec. 31, 2014
USD ($)
|
|---|---|
| Property, Plant and Equipment [Line Items] | |
| Deferred tax assets | $ (0.4) |
| Deferred tax liabilities | $ (0.4) |