Supplemental Detail for Certain Components of Consolidated Balance Sheets - Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Other assets, net
Prepaid expenses	$ 16,237	$ 12,851
Non-refundable escrow deposits for pending acquisitions	7,942	7,500
Corporate assets, net	5,991	6,074
Impounds related to mortgages payable	5,923	4,565	$ 2,074
Notes receivable issued in connection with property sales	5,235	5,267
Receivable for property rebuilds	4,051	3,919
Credit facility origination costs, net	3,638	4,366
Restricted escrow deposits	32	679	$ 25,327
Other items	19	115
Total other assets, net	$ 49,068	$ 45,336