Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Issuances and Net Proceeds on Equity Distribution Agreements (Details)

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Shareholders' Equity - Issuances and Net Proceeds on Equity Distribution Agreements (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]      
Issuance of common shares (in shares) 1,859 1,165 3,600
Weighted average price per share (in dollars per share) $ 30.00 $ 31.18 $ 32.06
Net proceeds $ 54,916 $ 35,472 $ 113,194