Net Income per Share - Additional Information (Details) - USD ($) shares in Millions	Oct. 29, 2019	Sep. 30, 2019
Subsequent Event [Line Items]
Shares authorized to repurchase		$ 235,000,000.0
Cumulative amount repurchased		$ 219,200,000
Cumulative number of shares repurchased		15.4
Subsequent Event
Subsequent Event [Line Items]
Shares authorized to repurchase	$ 265,000,000.0
Increase in authorized amount to be repurchased	$ 30,000,000.0