Overview and Basis of Presentation - Narrative (Details) (USD $)	0 Months Ended	9 Months Ended				0 Months Ended		0 Months Ended
	Jun. 06, 2014	Sep. 30, 2014	Jun. 06, 2014 noteholder	Sep. 30, 2014 Supplier Concentration Risk supplier	Dec. 31, 2013 Supplier Concentration Risk supplier	Jun. 06, 2014 Common Stock	Jun. 06, 2014 Common Stock	Jun. 06, 2014 Convertible Debt [Member] Common Stock
Class of Stock [Line Items]
Issuance of common stock during IPO (in shares)						6,037,500
Issue price (usd per share)							$ 43
Common stock issued pursuant to exercise of over-allotment option by underwriters						787,500
Proceeds from initial public offering, net of offering costs	$ 238,900,000	$ 238,904,000
Underwriting discounts and commissions	15,600,000
Issuance costs	5,100,000
Shares issued upon conversion						24,000,000		2,200,000
Ratio of shares issued upon conversion			1				1
Number of noteholders paid out upon closing of IPO			1
Repayment of Notes Payable and Accrued Interest	23,600,000
Withholding taxes	1,100,000
Converted debt amount	$ 96,500,000
Concentration Risk [Line Items]
Number of suppliers				2	2