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Stock-Based Compensation Plans and Employee Benefits - Activities for Unvested Restricted Stock Awards (Detail) - Restricted Stock [Member]
shares in Thousands
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of awards unvested, beginning balance | shares 902
Number of awards, Granted | shares 405
Number of awards, Vested | shares (419)
Number of awards, Forfeited | shares (26)
Number of awards unvested, ending balance | shares 862
Weighted-Average Grant Date Fair Value unvested, beginning balance | $ / shares $ 11.35
Weighted-Average Grant Date Fair Value, Granted | $ / shares 13.12
Weighted-Average Grant Date Fair Value, Vested | $ / shares 13.37
Weighted-Average Grant Date Fair Value, Forfeited | $ / shares 13.20
Weighted-Average Grant Date Fair Value unvested, ending balance | $ / shares $ 11.14