Stockholders' Equity - Narrative (Details) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended					9 Months Ended
	Feb. 28, 2021 shares	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 shares	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($) stockOptionPlan $ / shares shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 shares	Nov. 30, 2020 USD ($)
Shareholders Equity [Line Items]
Number of stock option plans | stockOptionPlan							2
Common shares issued upon exercise of options		0.9			0.6		3.6	1.7
Shares withheld for tax withholding obligation		0.2					1.2
Payment tax withholding share-based payment arrangement | $		$ 2,300					$ 20,319	$ 90
Treasury stock shares acquired							4.3
Common stock repurchased, average price (in dollars per share) | $ / shares							$ 22.69
Common shares repurchased | $		$ 25,775	$ 29,170	$ 33,540		$ 275
Treasury stock, value, acquired, cost method, net | $							$ 98,200
Treasury shares outstanding		10.9					10.9		5.3
Stock Repurchase Program
Shareholders Equity [Line Items]
Stock repurchase amount | $										$ 200,000
Treasury stock shares acquired		1.2					3.9
Common stock repurchased, average price (in dollars per share) | $ / shares		$ 21.13					$ 22.88
Common shares repurchased | $		$ 25,800					$ 88,500
2012 Equity Incentive Award Plan
Shareholders Equity [Line Items]
Increase in shares authorized for grant	4.7