Share-Based Compensation (Details)	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
MSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted	473,728
Weighted average fair value | $ / shares	$ 30.06
Expected volatility	42.70%
Risk-free rate	1.09%	[1]
Expected term (in years)	2 years 11 months 11 days	[2]
Expected dividends | $	$ 0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted	147,290
Weighted average fair value | $ / shares	$ 30.63
Expected volatility	42.70%
Risk-free rate	1.09%	[1]
Expected term (in years)	2 years 11 months 11 days	[2]
Expected dividends | $	$ 0
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted	92,000
Weighted average fair value | $ / shares	$ 28.66

[1] The risk-free rate was based on zero coupon U.S. government issues at the time of grant.

[2] The expected term represents the period from the valuation date to the end of the performance period.