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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Accounts receivable – net of allowance of $12,452 and $6,927 at September 30, 2020 and December 31, 2019, respectively | $ 12,452 | $ 6,927
Common shares, par value (in USD per share) | $ 0.01 | $ 0.01
Common shares, shares authorized (in shares) | 325,000,000 | 250,000,000
Common shares, shares issued (in shares) | 203,679,575 | 191,799,909
Common shares, shares outstanding (in shares) | 203,679,575 | 191,799,909
Mortgages, Senior Notes and Term Loans |  |
Mortgage notes, senior unsecured notes and term loans – net of unamortized deferred financing costs of $13,607 and $12,996, in the aggregate, at September 30, 2020 and December 31, 2019, respectively | $ 13,607 | $ 12,996

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