Supplemental Disclosures of Cash Flow Information - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Reconciliation of cash,cash equivalents, and restricted cash
Cash and cash equivalents shown in the consolidated balance sheets	$ 41,804	$ 54,011	$ 2,997
Restricted escrow deposits	82,391	4,529	9,081
Impounds related to mortgages payable	12,962	12,465	10,256
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$ 137,157	$ 71,005	$ 22,334	$ 21,071