Supplemental Detail for Certain Components of Consolidated Balance Sheets - Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other assets, net
Prepaid expenses	$ 12,851	$ 14,406
Non-refundable escrow deposits for pending acquisitions	7,500
Corporate assets, net	6,074	3,585
Notes receivable issued in connection with property sales	5,267	5,390
Impounds related to mortgages payable	4,565	2,015
Credit facility origination costs, net	4,366	7,303
Receivable for property rebuilds	3,919
Restricted escrow deposits	679	4,246
Other items	115	744
Total other assets, net	$ 45,336	$ 37,689