Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income (loss) attributable to common shareholders	$ (138,652)	$ 52,234	$ (104,842)	$ 49,730
Less: dividends paid on unvested share-based compensation	(2)	(74)	(4)	(147)
Undistributed earnings attributable to share-based compensation	0	(3)	0	0
Net income (loss) available to common shareholders	$ (138,654)	$ 52,157	$ (104,846)	$ 49,583
Denominator:
Weighted-average number of common shares — basic (in shares)	130,563,831	130,484,956	130,559,838	130,458,164
Effect of dilutive share-based compensation (in shares)	0	110,898	0	204,243
Weighted-average number of common shares — diluted (in shares)	130,563,831	130,595,854	130,559,838	130,662,407
Net income (loss) per share available to common shareholders — basic (in usd per share)	$ (1.06)	$ 0.40	$ (0.80)	$ 0.38
Net income (loss) per share available to common shareholders — diluted (in usd per share)	$ (1.06)	$ 0.40	$ (0.80)	$ 0.38
Antidilutive securities excluded from computation of earnings per share (in shares)	558,769	163,100	558,769	37,137