Condensed Consolidated Statements of Equity (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Offering costs	$ 10,900	$ 10,900
Offering costs, at market	$ 2,000	$ 1,400	$ 400	$ 500	$ 200