DEBT (Tables)

6 Months Ended

Jun. 30, 2015

Senior Secured Notes

Schedule of principal amount of the Senior Notes is repayable

The principal amount of the Senior Notes is repayable as follows (amounts in thousands):

April 2, 2018	$	57,500
April 2, 2019	115,000
April 2, 2020	115,000
April 2, 2021	143,750
April 2, 2022	143,750
	$	575,000

Summary of the liability component of the Notes

The following is a summary of the carrying value of the Senior Notes as of June 30, 2015 (in thousands):

	June 30,
	2015
Principal amount of the Senior Notes	$	575,000
Unamortized debt discount balance	(12,484		)
	$	562,516

Summary of interest expense for the Notes

The debt discount and debt issuance costs will be amortized as interest expense through April 2022. The following is a summary of interest expense for the three and six months ended June 30, 2015 (in thousands):

	June 30, 2015
	Three Months Ended		Six Months Ended
Stated coupon interest	$	15,281	$	15,281
Amortization of debt discount and debt issuance costs	471		471
Total interest expense	$	15,752	$	15,752

Convertible notes due 2021

Summary of the liability component of the Notes

The following is a summary of the liability component of the Convertible Notes as of June 30, 2015 (in thousands):

	June 30,
	2015
Principal amount of the Convertible Notes	$	345,000
Unamortized discount of the liability component	(108,685		)
	$	236,315

Summary of interest expense for the Notes

The debt discount and debt issuance costs will be amortized as interest expense through September 2021. The following is a summary of interest expense for the three and six months ended June 30, 2015 (in thousands):

	June 30, 2015
	Three Months Ended		Six Months Ended
Stated coupon interest	$	2,156	$	4,312
Amortization of debt discount and debt issuance costs	3,513		6,934
Total interest expense	$	5,669	$	11,246