Revenue Performance Obligation (Details) $ in Millions	Dec. 31, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
2019	$ 2.6
2020	2.6
2021	2.5
2022	2.6
2023	2.5
Thereafter	26.9
Total	$ 39.7
Revenue, Remaining Performance Obligation, Percentage	80.00%
Indefeasible Right of Use Contract, in Years	30