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Earnings per Share - Summary of Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Numerator (in millions):      
Net income available to common stockholders $ 116.6 $ 35.6 $ 139.1
Denominator (in thousands):      
Weighted average common shares outstanding 24,880 24,932 24,851
Dilutive effect of stock options and awards 113 187 171
Denominator for diluted earnings per share 24,993 25,119 25,022
Net income per share, basic: $ 4.69 $ 1.43 $ 5.6
Net income per share, diluted: $ 4.67 $ 1.42 $ 5.56