Treasury Stock - Additional Information (Details) - USD ($)	6 Months Ended
	Jun. 30, 2021	Oct. 17, 2016
Equity, Class of Treasury Stock [Line Items]
Treasury stock (in shares)	64,704,383
2016 BOD Authorized Common Stock Repurchase
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, additional repurchase authorization		$ 300,000,000.0
Remaining authorized repurchase amount	$ 76,600,000
2004 Amended and Restated Stock Incentive Plan
Equity, Class of Treasury Stock [Line Items]
Treasury shares issued for restricted stock units that vested during the period (in shares)	573,232
Average cost of treasury shares that were issued for restricted stock units that vested during the period (usd per share)	$ 3.19
Shares repurchased to satisfy minimum employee withholding tax requirements resulting from the vesting of such restricted stock units (in shares)	222,146
Average cost per share of treasury stock acquired (usd per share)	$ 38.44