Earnings Per Share Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
(Loss) Income from Continuing Operations	$ (18,687)	$ 153,839	$ (149,722)	$ 16,313
Less: Dividends distributed to Warrants	14	40	60	127
Less: Undistributed earnings allocated to Warrants	0	218	0	0
Net Income (Loss) Available to Common Stockholders, Basic, Continuing Operations	(18,701)	153,581	(149,782)	16,186
Add: Undistributed earnings allocated to dilutive securities	0	1	0	0
Net Income (Loss) Available to Common Stockholders, Diluted, Continuing Operations	(18,701)	153,582	(149,782)	16,186
Net Income (Loss) Available to Common Stockholders, Basic and Diluted, Discontinued Operations			15,039	(21,018)
Net loss attributable to common shareholders for basic EPS	(18,701)	145,507	(134,743)	(4,832)
Net loss attributable to common shareholders for diluted EPS	$ (18,701)	$ 145,508	$ (134,743)	$ (4,832)
Weighted average shares outstanding - basic (shares)	87,257	89,950	86,984	91,367
Impact of dilutive securities (shares)	0	503	0	363
Weighted average shares outstanding - diluted (shares)	87,257	90,453	86,984	91,730
Continuing Operations	$ (0.21)	$ 1.71	$ (1.72)	$ 0.18
Discontinued Operations	0.00	(0.09)	0.17	(0.23)
Net (Loss) Income Per Common Share	(0.21)	1.62	(1.55)	(0.05)
Continuing Operations	(0.21)	1.70	(1.72)	0.18
Discontinued Operations	0.00	(0.09)	0.17	(0.23)
Net (Loss) Income Per Common Share	$ (0.21)	$ 1.61	$ (1.55)	$ (0.05)