Basis of Presentation and Significant Accounting Policies - Calculation for Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations, Per Diluted Share									$ (3.93)	$ (9.04)	$ (5.25)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share									$ 0.21	$ 0.13	$ 0.14
Numerator:
Net loss	$ (29,856)	$ (19,986)	$ (21,270)	$ (36,870)	$ (120,569)	$ (27,817)	$ (46,252)	$ (15,127)	$ (107,982)	$ (209,765)	$ (119,388)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(138)	(1,688)	0	7,934	683	955	843	535	6,108	3,016	3,330
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ (29,718)	$ (18,298)	$ (21,270)	$ (44,804)	$ (121,252)	$ (28,772)	$ (47,095)	$ (15,662)	$ (114,090)	$ (212,781)	$ (122,718)
Denominator:
Weighted average common shares outstanding									29,009	23,553	23,359
Effect of dilutive securities:
Outstanding common stock equivalents									0	0	0
Weighted Average Number of Shares Outstanding, Diluted									29,009	23,553	23,359
Basic loss per share									$ (3.72)	$ (8.91)	$ (5.11)
Diluted loss per share									$ (3.72)	$ (8.91)	$ (5.11)
Excluded outstanding share-based awards having an anti-dilutive effect									2,640	1,071	388
Income (Loss) from Continuing Operations, Per Basic Share									$ (3.93)	$ (9.04)	$ (5.25)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share									$ 0.21	$ 0.13	$ 0.14
Convertible Debt Securities
Effect of dilutive securities:
Excluded outstanding share-based awards having an anti-dilutive effect									0	0	365
Warrant [Member]
Effect of dilutive securities:
Excluded outstanding share-based awards having an anti-dilutive effect									0	0	0