Treasury Stock - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Oct. 17, 2016
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, additional repurchase authorization		$ 300,000,000.0
Treasury stock (shares)	64,278,312
2016 BOD Authorized Common Stock Repurchase [Member]
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount	$ 105,600,000
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 (shares)	514,053
Average cost of treasury shares that were issued for restricted stock units that vested during the period (usd per share)	$ 3.16
Shares repurchased to satisfy minimum employee withholding tax requirements resulting from the vesting of such restricted stock units (shares)	200,872
Average cost per share of treasury stock acquired (usd per share)	$ 28.53
Non Tender Offer Repurchase [Member] | 2016 BOD Authorized Common Stock Repurchase [Member]
Equity, Class of Treasury Stock [Line Items]
Payments for Repurchase of Common Stock	$ 6,900,000
Treasury Stock, Shares, Acquired (shares)	259,461
Average cost per share of treasury stock acquired (usd per share)	$ 26.71