Debt (Tables)

3 Months Ended

Mar. 31, 2016

Schedule of outstanding debt obligations

	March 31, 2016		December 31, 2015
2023 Senior Notes	$	488,754	$	488,481
2015 Term Loan Facility		328,904		332,688
Convertible Notes		172,822		170,749
Total long-term debt		990,480		991,918
Less: current maturities		17,500		17,500
Long-term debt, net of current maturities	$	972,980	$	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 months ended March 31, 2016 and 2015 (in thousands):

	Three Months Ended March 31,
	2016		2015
Contractual interest expense	$	1,250	$	1,250
Amortization of debt issuance costs		258		234
Amortization of debt discount		1,815		1,649
Total interest expense	$	3,323	$	3,133

Convertible 2.5% notes

Schedule of outstanding debt obligations

	March 31, 2016
Liability component:
Principal	$	200,000
Less: debt discount and issuance costs, net		(27,178)
Net carrying amount	$	172,822
Equity component	$	38,188