Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income (loss) attributable to common shareholders	$ (138,446)	$ 21,752	$ (243,288)	$ 71,482
Less: dividends paid on unvested share-based compensation	(2)	(74)	(6)	(220)
Net income (loss) available to common shareholders	$ (138,448)	$ 21,678	$ (243,294)	$ 71,262
Denominator:
Weighted-average number of common shares — basic (in shares)	130,645,990	130,484,956	130,588,765	130,467,193
Effect of dilutive share-based compensation (in shares)	0	137,174	0	223,149
Weighted-average number of common shares — diluted (in shares)	130,645,990	130,622,130	130,588,765	130,690,342
Net income (loss) per share available to common shareholders — basic (in usd per share)	$ (1.06)	$ 0.17	$ (1.86)	$ 0.55
Net income (loss) per share available to common shareholders — diluted (in usd per share)	$ (1.06)	$ 0.17	$ (1.86)	$ 0.55
Antidilutive securities excluded from computation of earnings per share (in shares)	547,203	128,563	547,203	37,137