Recently Issued Accounting Standards - Narrative (Details) - Forecast - Accounting Standards Update 2016-02 $ in Millions	Jan. 01, 2019 USD ($)
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	$ 28.0
Operating lease liability	28.0
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	34.0
Operating lease liability	$ 34.0