Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share, Basic and Diluted
Net income (loss)		$ 47,129	$ (41,109)
Preferred stock dividends		(1,824)	(1,824)
Income (loss) available to common stockholders		$ 45,305	$ (42,933)
Weighted average shares outstanding		201,054	83,582
Weighted average shares outstanding for diluted income (loss) per share		201,740	83,582
Basic income (loss) per share		$ 0.23	$ (0.51)
Diluted income (loss) per share		$ 0.22	$ (0.51)
Options [Member]
Earnings Per Share, Basic and Diluted
Excluded from the diluted EPS calculation because their effect would be anti-dilutive	[1]	15	15
Restricted Stock [Member]
Earnings Per Share, Basic and Diluted
Dilutive impact		686
Excluded from the diluted EPS calculation because their effect would be anti-dilutive	[1]		25

[1] Shares excluded from the diluted earnings per share calculation because their effect would be anti-dilutive