Earnings Per Share - Reconciliation of Components of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ (217,605)	$ 40,674
Weighted average common shares outstanding - basic	198,333	197,383
Effect of dilutive instruments		418
Weighted average common shares outstanding - diluted	198,333	197,801
Basic	$ (1.10)	$ 0.21
Diluted	$ (1.10)	$ 0.21