Stock Awards - Stock-based Award Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Vesting Based on Service [Member]
Employee Restricted Equity Awards Vesting Activity [Line Items]
Nonvested awards at beginning of the year, Shares	922,954	1,057,054
Awarded, Shares	659,393	651,113
Vested, Shares	(750,854)	(781,076)
Forfeited, Shares	(21,010)	(4,137)
Nonvested awards at end of year, Shares	810,483	922,954
Nonvested awards at beginning of the year, Weighted Average Value at Award Date	$ 20.26	$ 18.79
Awarded, Weighted Average Value at Award Date	21.18	20.83
Vested, Weighted Average Value at Award Date	20.25	18.77
Forfeited, Weighted Average Value at Award Date	20.06	18.69
Nonvested awards at end of year, Weighted Average Value at Award Date	$ 21.02	$ 20.26
Vesting Based on Market/Performance Conditions [Member]
Employee Restricted Equity Awards Vesting Activity [Line Items]
Nonvested awards at beginning of the year, Shares	5,477,536	5,086,983
Awarded, Shares	1,828,971	1,957,802
Vested, Shares	(2,924,722)	(1,551,482)
Forfeited, Shares	(32,704)	(15,767)
Nonvested awards at end of year, Shares	4,349,081	5,477,536
Nonvested awards at beginning of the year, Weighted Average Value at Award Date	$ 15.86	$ 14.41
Awarded, Weighted Average Value at Award Date	18.45	17.94
Vested, Weighted Average Value at Award Date	13.87	13.73
Forfeited, Weighted Average Value at Award Date	19.17	16.72
Nonvested awards at end of year, Weighted Average Value at Award Date	$ 18.26	$ 15.86