Earnings Per Share - (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Numerator:
Net loss	$ (15,998)	$ (10,622)
Denominator:
Weighted average common shares outstanding	23,324	23,127
Effect of dilutive securities:
Outstanding common stock equivalents	0	0
Denominator for diluted earnings per share	23,324	23,127
Basic loss per share	$ (0.69)	$ (0.46)
Diluted loss per share	$ (0.69)	$ (0.46)
Excluded outstanding shared-based awards having an anti-dilutive effect	1,049	1,316
Convertible Debt Securities
Effect of dilutive securities:
Excluded outstanding shared-based awards having an anti-dilutive effect	1,610	2,054