Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic
Net income (loss)	$ 66,566	$ (99,091)	$ 41,375	$ (6,785)	$ 118,620
Less: Dividends and undistributed earnings allocated to participating securities	(612)	(222)	(432)	(564)	(1,223)
Net income (loss) allocated to common stockholders	$ 65,954	$ (99,313)	$ 40,943	$ (7,349)	$ 117,397
Weighted average common shares outstanding (in shares)	93,529,967	70,425,027	59,293,218	74,391,688	60,853,081
Basic earnings (loss) per common share (in dollars per share)	$ 0.71	$ (1.41)	$ 0.69	$ (0.10)	$ 1.93
Diluted
Net income (loss) allocated to common stockholders	$ 65,954	$ (99,313)	$ 40,943	$ (7,349)	$ 117,397
Weighted average common shares outstanding (in shares)	93,529,967	70,425,027	59,293,218	74,391,688	60,853,081
Diluted effect of share-based compensation (in shares)	189,200	0	377,637	0	348,777
Weighted average diluted common shares (in shares)	93,719,167	70,425,027	59,670,855	74,391,688	61,201,858
Diluted earnings (loss) per common share (in dollars per share)	$ 0.70	$ (1.41)	$ 0.69	$ (0.10)	$ 1.92
Weighted-average shares of anti-dilutive RSUs excluded from diluted EPS computation	27,815			173,235