v3.25.2
Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Numerator (in millions):        
Net income available to common stockholders $ 23.5 $ 31.2 $ 56.3 $ 72.6
Denominator (in thousands):        
Weighted average common shares outstanding 24,937 24,937 24,954 24,918
Dilutive effect of stock options and awards 105 160 143 173
Denominator for diluted earnings per share 25,042 25,097 25,097 25,091
Net income per share, basic: $ 0.94 $ 1.25 $ 2.26 $ 2.91
Net income per share, diluted: $ 0.94 $ 1.24 $ 2.24 $ 2.89