Convertible Senior Notes - Schedule of Conversion (Details)	1 Months Ended	2 Months Ended
	Nov. 30, 2013 shares $ / shares	Jun. 30, 2017 shares $ / shares
2022 Notes
Debt Instrument [Line Items]
Initial conversion price (in USD per share) | $ / shares		$ 134.75
Conversion rate (in USD per share)		0.00742
Converted number of shares (in shares) | shares		5,806,936
2018 Notes
Debt Instrument [Line Items]
Initial conversion price (in USD per share) | $ / shares	$ 73.88
Conversion rate (in USD per share)	0.01354
Converted number of shares (in shares) | shares	7,783,023