Reconciliation of Earnings Per Share (EPS) - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Loss, Basic EPS	$ (203,116)	$ (15,420)
Basic Average Common Shares Outstanding (in shares)	86,632	72,830
Earnings Per Share, Basic (in dollars per share)	$ (2.34)	$ (0.21)
Effect of dilutive securities
Net Loss, Diluted EPS	$ (203,116)	$ (15,420)
Diluted Average Common Shares Outstanding (in shares)	86,632	72,830
Earnings Per Share, Diluted (dollars per share)	$ (2.34)	$ (0.21)
Stock options
Effect of dilutive securities
Incremental common shares attributable to share-based payment arrangements	0	0
Non-vested restricted stock
Effect of dilutive securities
Incremental common shares attributable to share-based payment arrangements	0	0
Performance share awards
Effect of dilutive securities
Incremental common shares attributable to share-based payment arrangements	0	0