Supplemental Detail for Certain Components of Consolidated Balance Sheets - Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other assets, net
Deferred financing costs, net	$ 20,490	$ 23,274
Notes receivable issued in connection with property sales	17,905	18,342
Prepaid expenses	14,258	14,137
Impounds related to mortgages payable	5,860	5,789
Restricted escrow deposits	4,179	36,540
Corporate assets, net	2,313	2,600
Other items	45	2,797
Total other assets	75,276	107,650
Credit Facility
Other assets, net
Credit facility origination costs, net	$ 10,226	$ 4,171