Earnings Per Share - Reconciliation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net income (loss) attributable to common shareholders	$ (8,564)	$ (138,652)	$ (137,285)	$ (104,842)
Less: dividends paid on unvested share-based compensation	(12)	(2)	(23)	(4)
Net income (loss) available to common shareholders	$ (8,576)	$ (138,654)	$ (137,308)	$ (104,846)
Denominator:
Weighted-average number of common shares — basic (in shares)	130,813,521	130,563,831	130,794,801	130,559,838
Effect of dilutive share-based compensation (in shares)	0	0	0	0
Weighted-average number of common shares — diluted (in shares)	130,813,521	130,563,831	130,794,801	130,559,838
Net income (loss) per share available to common shareholders — basic (in usd per share)	$ (0.07)	$ (1.06)	$ (1.05)	$ (0.80)
Net income (loss) per share available to common shareholders — diluted (in usd per share)	$ (0.07)	$ (1.06)	$ (1.05)	$ (0.80)