Long Term Debt (Tables)

6 Months Ended

Jun. 30, 2015

Long-term Debt, Unclassified [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt as of June 30, 2015 consists of the following (in thousands):

Senior Notes	$	246,462
Convertible Notes	350,747
Total long-term debt	597,209
Less: current portion	—
Total long-term debt, less current portion	$	597,209