Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Basic EPS:
Net Income (Loss)	$ (1,653,971)	$ (283,427)	$ (2,442)
Income, Share Amounts	44,463	43,795	43,331
Earnings (Loss) Per Share, Basic	$ (37.20)	$ (6.47)	$ (0.06)
Dilutive Securities:
Dilutive Options, Shares	0	0
Dilutive RSA's, Shares	0	0
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ (1,653,971)	$ (283,427)	$ (2,442)
Weighted Average Number of Shares Outstanding, Diluted	44,463	43,795	43,331
Earnings (Loss) Per Share, Diluted	$ (37.20)	$ (6.47)	$ (0.06)
Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in the computation of diluted EPS	1,300	1,400	1,600
Restricted Stock Awards [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in the computation of diluted EPS	500	500	300
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual) [Abstract]
Antidilutive shares not included in the computation of diluted EPS	600	400	300