Common Stock and Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Dilutive Earnings (Loss) Per Share (Details) - shares shares in Thousands			3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock Options
Antidilutive Securities Excluded from Computation of Dilutive Earnings (Loss) Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings (loss) per share			3,567	3,018	3,567	2,942
Out-of-the-money stock options	3,600	3,100
Performance Shares
Antidilutive Securities Excluded from Computation of Dilutive Earnings (Loss) Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings (loss) per share			0	0	0	0
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Dilutive Earnings (Loss) Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings (loss) per share			337	461	170	461
Convertible Notes
Antidilutive Securities Excluded from Computation of Dilutive Earnings (Loss) Per Share [Line Items]
Antidilutive securities excluded from computation of dilutive earnings (loss) per share			4,932	4,932	4,932	4,932