Stock Repurchase Program - Narrative (Details) - USD ($)	May 24, 2018	Apr. 29, 2018
Equity, Class of Treasury Stock [Line Items]
Remaining authorization under stock repurchase program		$ 21,700,000
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock purchase authorized amount,Increase during the period	$ 250,000,000.0
Stock purchase authorized amount	$ 271,700,000.0