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Consolidated Statements of Common Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Shares
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2018   39,664,884      
Beginning balance at Dec. 31, 2018 $ 728,863 $ 198,324 $ 344,250 $ 190,433 $ (4,144)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Common Stock Issuances, Net of Expenses (in shares)   347,000      
Stock Issuances, Net of Expenses 17,102 $ 1,735 15,367    
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans (in shares)   53,339      
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans 2,658 $ 267 2,391    
Stock Issued Under Share-Based Compensation Plans, Net of Shares Withheld for Employee Taxes (in shares)   92,368      
Stock Issued Under Share-Based Compensation Plans, Net of Shares Withheld for Employee Taxes (2,714) $ 462 (3,176)    
Net Income 86,847     86,847  
Other Comprehensive Income (Loss) (1,509)       (1,509)
Stranded Tax Transfer 0     784 (784)
Stock Compensation Expense 5,958   5,958    
Common Dividends (55,723)     (55,723)  
Ending balance (in shares) at Dec. 31, 2019   40,157,591      
Ending balance at Dec. 31, 2019 781,482 $ 200,788 364,790 222,341 (6,437)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Common Stock Issuances, Net of Expenses (in shares)   868,484      
Stock Issuances, Net of Expenses 36,808 $ 4,342 32,466    
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans (in shares)   365,267      
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans 15,047 $ 1,826 13,221    
Stock Issued Under Share-Based Compensation Plans, Net of Shares Withheld for Employee Taxes (in shares)   78,537      
Stock Issued Under Share-Based Compensation Plans, Net of Shares Withheld for Employee Taxes (2,122) $ 393 (2,515)    
Net Income 95,851     95,851  
Other Comprehensive Income (Loss) (2,070)       (2,070)
Stock Compensation Expense 6,284   6,284    
Common Dividends (60,314)     (60,314)  
Ending balance (in shares) at Dec. 31, 2020   41,469,879      
Ending balance at Dec. 31, 2020 870,966 $ 207,349 414,246 257,878 (8,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans (in shares)   11,540      
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans 504 $ 58 446    
Stock Issued Under Share-Based Compensation Plans, Net of Shares Withheld for Employee Taxes (in shares)   70,105      
Stock Issued Under Share-Based Compensation Plans, Net of Shares Withheld for Employee Taxes (1,489) $ 351 (1,840)    
Net Income 176,769     176,769  
Other Comprehensive Income (Loss) 1,983       1,983
Stock Compensation Expense 6,908   6,908    
Common Dividends (64,864)     (64,864)  
Ending balance (in shares) at Dec. 31, 2021   41,551,524      
Ending balance at Dec. 31, 2021 $ 990,777 $ 207,758 $ 419,760 $ 369,783 $ (6,524)