Shareholders' Equity - Additional Information (Details) - USD ($)		12 Months Ended			84 Months Ended
	May 17, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	May 01, 2019
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount				$ 100,000,000.0
Treasury stock shares (in shares)		16,685,000	15,451,000		16,685,000
Fair value of common stock repurchased		$ 591,338,000	$ 536,243,000		$ 591,338,000
Stock repurchase program, remaining authorized repurchase amount		$ 406,200,000			$ 406,200,000
Treasury stock, shares, acquired					16,700,000
Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Treasury stock shares (in shares)		1,234,417	1,087,914		1,234,417
Treasury stock, average cost per share		$ 44.63	$ 35.55
Fair value of common stock repurchased		$ 55,100,000	$ 38,700,000	$ 80,000,000.0	$ 55,100,000
Treasury stock, shares, acquired	566,599			2,910,150
Maximum
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount		$ 100,000,000.0			$ 100,000,000.0	$ 372,500,000