Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2016 USD ($)
Commitments and Contingencies
Amount of commitments for re-leasing costs, recurring capital expenditures and non-recurring building improvements	$ 7.0
Amount of commitments for construction contracts, which is expected to be paid in next twelve months	21.9
Minimum future rental payments for the next five years and thereafter under ground leases
2017	15.0
2018	15.1
2019	14.8
2020	14.5
2021	14.0
Thereafter	128.7
Total	202.1
Realty Income
Minimum future rental payments for the next five years and thereafter under ground leases
2017	1.6
2018	1.6
2019	1.5
2020	1.4
2021	1.2
Thereafter	22.1
Total	29.4
Tenants
Minimum future rental payments for the next five years and thereafter under ground leases
2017	13.4
2018	13.5
2019	13.3
2020	13.1
2021	12.8
Thereafter	106.6
Total	$ 172.7