Debt Obligations (Tables)

9 Months Ended

Sep. 30, 2017

Debt Conversion [Line Items]

Convertible Debt [Table Text Block]

The carrying value of Company's Convertible debt is shown below.

	September 30,
	2017
Principal value, Convertible Senior Notes, due 2024	258,750
Unamortized issuance costs	(6,938	)
Unamortized discount	(57,326	)
Convertible debt	194,486

Schedule of Long-term Debt Instruments

Long term obligations consisted of the following (in thousands):

	September 30,			December 31,
	2017			2016
Unsubordinated term loan	$	74,311		$	85,636
Revolving credit facility	220,000			355,000
Aircraft loans	4,374			18,085
Convertible debt	194,486			—
Total long term obligations	493,171			458,721
Less: current portion	(19,247		)	(29,306		)
Total long term obligations, net	$	473,924		$	429,415