Fair Value Measurements Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes, Fair Value Disclosure	$ 202,253		$ 202,253
Carrying value of senior secured notes	210,000		210,000		$ 210,000
Estimated fair value of convertible debt	48,620		48,620
Carrying value of convertible debt	57,500		57,500		57,500
Line of Credit Facility, Fair Value of Amount Outstanding	61,041		61,041
Line of Credit Facility, Amount Outstanding	73,500		73,500		$ 59,200
Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Notional Amount	5,283		5,283
Gain (Losses) as a result of changes in the fair value of the contracts	$ (244)	$ 217	$ (454)	$ (69)
Convertible Notes due December 15, 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock price at the end of the period	$ 6.17		$ 6.17
Expected volatility			49.80%
Credit spreads			21.65%
Risk-free interest rate			0.81%