Supplemental Detail for Certain Components of Consolidated Balance Sheets - Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Other assets, net
Prepaid expenses	$ 15,821	$ 12,851
Restricted escrow deposits	7,054	679	$ 8,550
Impounds related to mortgages payable	7,029	4,565	$ 2,916
Corporate assets, net	5,926	6,074
Receivable for property rebuilds	3,244	3,919
Credit facility origination costs, net	2,911	4,366
Non-refundable escrow deposits for pending acquisitions	0	7,500
Notes receivable issued in connection with property sales	0	5,267
Other items	1,722	115
Total other assets, net	$ 43,707	$ 45,336