Convertible Senior Notes (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Convertible Debt

The Convertible Notes consist of the following (in thousands):

	June 30, 2017			December 31, 2016
Liability component
Principal	$	1,437,483		$	1,437,500
Less: note discount and issuance costs	(70,391		)	(89,344		)
Net carrying amount	$	1,367,092		$	1,348,156
Equity component
Temporary equity	$	—		$	79,495
Additional paid-in capital	162,869			83,374
Total equity (including temporary equity)	$	162,869		$	162,869

Schedule of Interest Expense Recognized Related to Convertible Notes

The following table includes total interest expense recognized related to the Convertible Notes (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Contractual interest expense	$	1,797	$	1,797	$	3,594	$	3,594
Amortization of debt issuance costs	1,039		1,015		2,071		2,024
Amortization of debt discount	8,472		8,222		16,882		16,383
	$	11,308	$	11,034	$	22,547	$	22,001