Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred shares, shares authorized (in shares)		10,000,000
Preferred shares, par value (in dollars per share)		$ 0.01
Preferred shares, shares issued (in shares)		1,725,000
Preferred shares, shares outstanding (in shares)		1,725,000
Aggregate liquidation preference		$ 172,500,000
Common shares, shares authorized (in shares)	140,000,000	140,000,000
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, shares issued (in shares)	63,136,129	49,291,130
Common shares, shares outstanding (in shares)	63,136,129	49,291,130