v3.26.1
Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Millions
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Deferred Compensation [Member]
Treasury Stock, Common
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Shares Held In Trust For Deferred Compensation Plan 114,000            
Common Stock, Dividends, Per Share, Declared $ 0.640            
Beginning Balances (shares) at Dec. 31, 2024 [1],[2]   22,899,000          
Beginning Balances at Dec. 31, 2024 $ 1,390.2 $ 11.1 [1] $ 830.5 $ 550.3 $ (1.7) $ 9.8 $ (9.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 50.9     50.9      
Other comprehensive income (loss) (0.6)       (0.6)    
Other Comprehensive Income (Loss), Net of Tax (0.6)            
Dividend declared       (14.8)      
Retirement savings plan and dividend reinvestment plan (shares) [1],[2],[3]   161,000          
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan [3] 19.8 $ 0.1 [1] 19.7        
Share-based compensation (shares) [1],[2],[4],[5]   29,000          
Share-based compensation and tax benefit [4],[5]   $ 0.0 [1] 1.8        
Treasury stock activities [2]           2.4 (2.4)
Ending Balances (shares) at Mar. 31, 2025 [1],[2]   23,089,000          
Ending Balances at Mar. 31, 2025 $ 1,447.3 $ 11.2 [1] 852.0 586.4 (2.3) 12.2 (12.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation 8,000            
Shares Held In Trust For Deferred Compensation Plan 126,000            
Preferred Stock, Shares Authorized 2,000,000,000            
Preferred Stock, Par or Stated Value Per Share $ 10.00            
Shares Held In Trust For Deferred Compensation Plan 129,000            
Common Stock, Dividends, Per Share, Declared $ 0.685            
Beginning Balances (shares) at Dec. 31, 2025 [1],[2]   23,896,000          
Beginning Balances at Dec. 31, 2025 $ 1,598.5 $ 11.6 [1],[6] 962.8 [6] 626.8 [6] (2.7) [6] 12.6 [6] (12.6) [6]
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 59.3     59.3      
Other comprehensive income (loss) 1.2       1.2    
Other Comprehensive Income (Loss), Net of Tax 1.2            
Dividend declared       (16.8)      
Retirement savings plan and dividend reinvestment plan (shares) [1],[2],[3]   55,000          
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan [3]   $ 0.1 [1] 6.9        
Share-based compensation (shares) [1],[2],[4],[5]   52,000          
Share-based compensation and tax benefit [4],[5]   $ 0.0 [1] 2.5        
Treasury stock activities [2]           4.8 (4.8)
Ending Balances (shares) at Mar. 31, 2026 [1],[2]   24,003,000          
Ending Balances at Mar. 31, 2026 $ 1,651.7 $ 11.7 [1] $ 972.2 $ 669.3 $ (1.5) $ 17.4 $ (17.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation 15,000            
Stock Issued, Value, During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan [3] $ 7.0            
Preferred Stock, Shares Authorized 2,000,000.0            
Preferred Stock, Par or Stated Value Per Share $ 10.00            
Shares Held In Trust For Deferred Compensation Plan 158,000            
[1] 2.0 million shares of preferred stock at $0.01 par value have been authorized. No preferred shares have been issued or are outstanding; accordingly, no information has been included in the Condensed Consolidated Statements of Stockholders’ Equity.    
[2] Includes 158 thousand, 129 thousand, 126 thousand, and 114 thousand shares at March 31, 2026, December 31, 2025, March 31, 2025 and December 31, 2024, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan.
[3] Includes shares issued under the Retirement Savings Plan, DRIP/DSPP and/or ATM program, as applicable.
[4] Includes amounts for shares issued for directors’ compensation.
[5] The shares issued under the SICP are net of shares withheld for employee taxes. For the three months ended March 31, 2026 and 2025, we withheld 15 thousand and 8 thousand shares, respectively, for employee taxes.
[6]