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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Shares
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Unrealized Gain (Loss) on Available-for-Sale Debt, net of tax
Unamortized Actuarial Losses and Prior Service Costs Related to Pension and Postretirement Benefits, net of tax
Beginning balance, shares (in shares) at Dec. 31, 2019   40,157,591          
Beginning balance at Dec. 31, 2019 $ 781,482 $ 200,788 $ 364,790 $ 222,341 $ (6,437) [1]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Common Stock Issuances, Net of Expenses (in shares)   257,074          
Common Stock Issuances, Net of Expenses 8,275 $ 1,285 6,990        
Common Stock Retirements and Forfeitures (in shares)   (38,217)          
Common Stock Retirements and Forfeitures (2,072) $ (191) (1,881)        
Net Income 24,268     24,268      
Other Comprehensive Income 203       203 [1]    
Stock Compensation Expense 2,770   2,770        
Common Dividends (14,907)     (14,907)      
Ending balance, shares (in shares) at Mar. 31, 2020   40,376,448          
Ending balance at Mar. 31, 2020 800,019 $ 201,882 372,669 231,702 (6,234) [1]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Before Tax         (11,528) $ 265 $ (11,793)
Tax Effect         3,021 (56) 3,077
Beginning balance, shares (in shares) at Dec. 31, 2020   41,469,879          
Beginning balance at Dec. 31, 2020 870,966 $ 207,349 414,246 257,878 (8,507) [1] 209 (8,716)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Common Stock Issuances, Net of Expenses (in shares)   76,277          
Common Stock Issuances, Net of Expenses (25) $ 382 (407)        
Common Stock Retirements and Forfeitures (in shares)   (35,701)          
Common Stock Retirements and Forfeitures (1,507) $ (179) (1,328)        
Net Income 30,329     30,329      
Other Comprehensive Income 115       115 [1]    
Stock Compensation Expense 4,197   4,197        
Common Dividends (16,208)     (16,208)      
Ending balance, shares (in shares) at Mar. 31, 2021   41,510,455          
Ending balance at Mar. 31, 2021 $ 887,867 $ 207,552 $ 416,708 $ 271,999 (8,392) [1] 174 (8,566)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Before Tax         (11,370) 220 (11,590)
Tax Effect         $ 2,978 $ (46) $ 3,024
[1]
1Accumulated Other Comprehensive Income (Loss) as of March 31, 2021 and December 31, 2020 is comprised of the following:
(in thousands)March 31,
2021		December 31,
2020
Unrealized Gain (Loss) on Available-for-Sale Debt Securities:  
Before Tax$220 $265 
Tax Effect(46)(56)
Unrealized Gain (Loss) on Available-for-Sale Debt, net of tax174 209 
Unamortized Actuarial Losses and Prior Service Costs Related to Pension and Postretirement Benefits:
Before Tax(11,590)(11,793)
Tax Effect3,024 3,077 
Unamortized Actuarial Losses and Prior Service Costs Related to Pension and Postretirement Benefits, net of tax(8,566)(8,716)
Accumulated Other Comprehensive Loss:
Before Tax(11,370)(11,528)
Tax Effect2,978 3,021 
Net Accumulated Other Comprehensive Loss$(8,392)$(8,507)