Supplemental Detail for Certain Components of Consolidated Balance Sheets - Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other assets, net
Prepaid expenses	$ 14,209	$ 14,258
Restricted escrow deposits	11,586	4,179
Notes receivable issued in connection with property sales	5,419	17,905
Corporate assets, net	3,032	2,313
Impounds related to mortgages payable	2,637	5,860
Other items	757	44
Total other assets	45,683	54,785
Credit Facility
Other assets, net
Credit facility origination costs, net	$ 8,043	$ 10,226