Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2018 USD ($)
Commitments and Contingencies
Amount of commitments for re-leasing costs, recurring capital expenditures and non-recurring building improvements	$ 5.8
Amount of commitments for construction contracts, which is expected to be paid in next twelve months	23.6
Minimum future rental payments for the next five years and thereafter
2019	15.0
2020	14.9
2021	14.4
2022	14.3
2023	14.3
Thereafter	101.8
Total	174.7
Tenants
Minimum future rental payments for the next five years and thereafter
2019	13.5
2020	13.5
2021	13.2
2022	13.1
2023	13.1
Thereafter	82.0
Total	148.4
Realty Income
Minimum future rental payments for the next five years and thereafter
2019	1.5
2020	1.4
2021	1.2
2022	1.2
2023	1.2
Thereafter	19.8
Total	$ 26.3