Shareholders' Equity - Additional Information (Details)	Sep. 30, 2019 USD ($) shares
Second Accelerated Share Repurchase Agreement | Maximum
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 100,000,000.0
Third Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 9,700,000
Shares repurchased, authorized shares | shares	274,981
Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Stock repurchase program, remaining authorized repurchase amount	$ 490,200,000