Income Taxes (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Jan. 03, 2009	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2009
Operating Loss Carryforwards [Line Items]
Built-in gains on land upon REIT election		$ 17.3		$ 18.3
Taxable periods of built-in gains upon REIT election	10 years
Tax basis carrying value of assets		552.9	325.9
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		122.4
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 99.6