Summary of Significant Accounting Policies Narrative (Details) (USD $)	12 Months Ended				12 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012	Dec. 31, 2011	Oct. 06, 2013 State and Local Jurisdiction [Member]	Dec. 31, 2013 Building and Building Improvements [Member]	Dec. 31, 2013 Corporate Equipment [Member] Minimum [Member]	Dec. 31, 2013 Corporate Equipment [Member] Maximum [Member]	Dec. 31, 2012 Variable Interest Entity, Primary Beneficiary [Member]
Accounting Policies [Line Items]
Commercial real estate properties, at cost, net	$ 1,354,072,000							$ 400,000
Mortgage notes payable								600,000
Lease cancellation fees	1,600,000	3,900,000	700,000
Deferred revenue	3,700,000
Advertising expense	4,200,000	1,300,000	1,600,000
Transaction costs	33,500,000
Useful life					39 years	3 years	7 years
Operating loss carryforwards				$ 13,400,000
Number of reportable segments	2