Business and Basis of Presentation - Additional Information (Detail) (Secondary Public Offering, USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Sep. 27, 2014	Sep. 27, 2014
Secondary Public Offering
Public Offering [Line Items]
Issuance of new shares, shares	11,629,627
Issuance of new shares, price per share	$ 76.75	$ 76.75
Fees related to secondary offering		$ 0.7