Earnings (Loss) 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 (loss) income attributable to common stockholders	$ (72,782)	$ 28,960	$ (107,341)	$ 37,905
Dividends declared on unvested share-based compensation	0	(35)	0	(70)
Net (loss) income available to common stockholders	$ (72,782)	$ 28,925	$ (107,341)	$ 37,835
Denominator:
Weighted-average number of common shares outstanding—basic (in shares)	200,797,317	202,405,507	201,002,576	202,610,178
Effect of dilutive securities:
Weighted-average number of common shares outstanding—diluted (in shares)	200,797,317	202,900,639	201,002,576	203,106,490
Earnings (loss) per share:
Net (loss) income per share available to common stockholders - basic (in dollars per share)	$ (0.36)	$ 0.14	$ (0.53)	$ 0.19
Net (loss) income per share available to common stockholders - diluted (in dollars per share)	$ (0.36)	$ 0.14	$ (0.53)	$ 0.19
Unvested restricted common stock
Effect of dilutive securities:
Unvested restricted common stock and shares related to unvested PSUs (in shares)	0	68,995	0	58,084
Shares related to unvested PSUs
Effect of dilutive securities:
Unvested restricted common stock and shares related to unvested PSUs (in shares)	0	426,137	0	438,228
Shares related to unvested PSUs
Earnings (loss) per share:
Anti-dilutive shares (in shares)			171,458