Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Accounts receivable, allowance	$ 5,505,000	$ 5,309,000
Discount and deferred financing costs	$ 14,704,000
Series B Cumulative Convertible Voting and Participating Preferred Shares, par value (in USD per share)	$ 0.01	$ 0.01
Series B Cumulative Convertible Voting and Participating Preferred Shares, shares authorized (in shares)	375,000	375,000
Series B Cumulative Convertible Voting and Participating Preferred Shares, liquidation preference	$ 0	$ 375,000
Series B Cumulative Convertible Voting and Participating Preferred Shares, shares issued (in shares)	0	375,000
Series B Cumulative Convertible Voting and Participating Preferred Shares, shares outstanding (in shares)	0	375,000
Series A Cumulative Non-Voting Preferred Shares, par value (in USD per share)	$ 0.01	$ 0.01
Series A Cumulative Non-Voting Preferred Shares, shares authorized (in shares)	1,000	1,000
Series A Cumulative Non-Voting Preferred Shares, aggregate liquidation preference	$ 125	$ 125
Series A Cumulative Non-Voting Preferred Shares, shares issued (in shares)	0	125
Series A Cumulative Non-Voting Preferred Shares, shares outstanding (in shares)	0	125
Common shares, par value (in USD per share)	$ 0.01	$ 0.01
Common shares, shares authorized (in shares)	250,000,000	250,000,000
Common shares, shares issued (in shares)	143,459,052	69,370,609
Common shares, shares outstanding (in shares)	143,459,052	69,370,609
Construction Loan
Deferred financing costs		$ 179,000
Mortgage Notes and Term Loans
Deferred financing costs	$ 14,395,000	25,712,000
Discount and deferred financing costs	$ 14,704,000	$ 31,997,000