Supplemental Detail for Certain Components of Consolidated Balance Sheets - Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other assets, net
Restricted escrow deposits	$ 21,074	$ 4,179
Prepaid expenses	13,694	14,258
Notes receivable issued in connection with property sales	5,448	17,905
Impounds related to mortgages payable	2,701	5,860
Corporate assets, net	2,502	2,313
Other items	1,258	44
Total other assets	55,411	54,785
Credit Facility
Other assets, net
Credit facility origination costs, net	$ 8,734	$ 10,226