Consolidated Statements of Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Issuance of shares, offering costs	$ 209	$ 518	$ 2,149
Common shares, dividend declared per share (in dollars per share)	$ 1.32	$ 1.32	$ 1.32
LTIP units, distributions per unit (in dollars per share)	$ 1.32	$ 1.32	$ 1.32