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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
Schedule of Restricted Stock Activity The following table presents restricted stock activity for the years ended December 31, 2022, 2021 and 2020:
202220212020
# of SharesWeighted Average Fair Value at Date of Grant# of SharesWeighted Average Fair Value at Date of Grant# of SharesWeighted Average Fair Value at Date of Grant
Nonvested restricted shares outstanding at January 1377,729 $36.78 405,299 $34.96 221,622 $37.08 
Granted678,343 31.17 207,135 39.10 339,454 34.27 
Forfeited(49,617)30.57 (4,345)33.37 (36,749)33.98 
Vested(479,494)34.81 (230,360)35.71 (119,028)37.15 
Nonvested restricted shares outstanding at December 31526,961 $31.89 377,729 $36.78 405,299 $34.96 
Schedule of Reconciliation of the Common and Potential Common Shares Outstanding Used in Earnings Per Share Calculation A reconciliation of the average number of common and potential common shares outstanding used in the calculations of basic and diluted net income per share follows (in millions, shares in thousands):
Years Ended December 31,
202220212020
Numerator (basic and diluted):
Net income (loss)$(6.6)$88.9 $83.8 
Less: Dividends paid to participating securities(0.9)(0.6)(0.7)
Less: Undistributed earnings available to participating securities— (0.5)(0.4)
Undistributed and distributed earnings (loss) available to common stockholders$(7.5)$87.8 $82.7 
Denominator:
Average number of common shares outstanding42,442.2 31,030.4 30,832.7 
Effect of dilutive stock-based compensation(1)
— 369.9 271.5 
Average number of common and potential common shares outstanding42,442.2 31,400.3 31,104.2 
(1) Diluted loss per share excludes the weighted average potential common shares as their inclusion would be anti-dilutive.