Debt (Tables)

6 Months Ended

Jun. 30, 2016

Schedule of outstanding debt obligations

Our outstanding debt obligations as of June 30, 2016 and December 31, 2015 consisted of the following (in thousands):

	June 30, 2016		December 31, 2015
2023 Senior Notes	$	489,033	$	488,481
2015 Term Loan Facility		325,120		332,688
Convertible Notes		174,953		170,749
Total long-term debt		989,106		991,918
Less: current maturities		49,610		17,500
Long-term debt, net of current maturities	$	939,496	$	974,418

Schedule of total interest expense recognized related to the Convertible Notes

The following table sets forth total interest expense recognized related to the Convertible Notes during the three and six months ended June 30, 2016 and 2015 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Contractual interest expense	$	1,250	$	1,250	$	2,500	$	2,500
Amortization of debt issuance costs		265		246		524		480
Amortization of debt discount		1,867		1,727		3,682		3,376
Total interest expense	$	3,382	$	3,223	$	6,706	$	6,356

Convertible 2.5% notes

Schedule of outstanding debt obligations

Our outstanding Convertible Note balances as of June 30, 2016 consisted of the following (in thousands):

	June 30, 2016
Liability component:
Principal	$	199,998
Less: debt discount and issuance costs, net		(25,045)
Net carrying amount	$	174,953
Equity component	$	38,188