Convertible Senior Notes (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Convertible Debt

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

	September 30, 2017			December 31, 2016
Liability component
Principal	$	1,437,483		$	1,437,500
Less: note discount and issuance costs	(60,810		)	(89,344		)
Net carrying amount	$	1,376,673		$	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				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Contractual interest expense	$	1,797	$	1,797	$	5,391	$	5,391
Amortization of debt issuance costs	1,045		1,021		3,117		3,045
Amortization of debt discount	8,536		8,284		25,418		24,667
	$	11,378	$	11,102	$	33,926	$	33,103