CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Cash and cash equivalents		$ 37,357	$ 54,976	$ 31,238
Restricted cash	[1]	14,867	15,095	16,083
Total cash and cash equivalents and restricted cash shown in the consolidated statements of cash flows		$ 52,224	$ 70,071	$ 47,321	$ 35,578

[1] Restricted cash consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties and cash held for the operations of one of our life science properties that is owned in a joint venture arrangement in which we own a 55% equity interest.