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Commitments and Contingencies (Details)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Remaining term of operating and ground leases (in years) 86 years
Future minimum lease obligations under non-cancelable operating and ground leases  
2016 $ 31.3
2017 24.6
2018 20.3
2019 17.0
2020 16.4
Thereafter $ 520.0