Net Income Per Common Share (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic Net Income Per Common Share:
Net income available to common shareholders	$ 30,230	$ 117,036
Weighted average common shares outstanding (in shares)	147,311	160,927
Net income per common share, basic (in dollars per share)	$ 0.21	$ 0.73
Diluted Net Income Per Common Share:
Net income available to common shareholders	$ 30,230	$ 117,036
Weighted average common shares outstanding (in shares)	147,311	160,927
Effect of dilutive outstanding equity-based awards, warrants, and earnout payments	1,090	1,833
Weighted average number of diluted common shares (in shares)	148,401	162,760
Net income per common share, diluted (in dollars per share)	$ 0.20	$ 0.72