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Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss)    
Beginning balance $ 93,932 $ 84,426
Other comprehensive income before reclassifications (84) (671)
Amounts reclassified from accumulated other comprehensive income (323) 711
Income tax (expense) benefit 107 (35)
Ending balance 100,095 93,932
Hedging Derivative Activities    
Accumulated Other Comprehensive Income (Loss)    
Beginning balance 0 (191)
Other comprehensive income before reclassifications 0 (773)
Amounts reclassified from accumulated other comprehensive income 0 1,026
Income tax (expense) benefit 0 (62)
Ending balance 0 0
Post Retirement Benefit Plan Items    
Accumulated Other Comprehensive Income (Loss)    
Beginning balance 1,375 1,561
Other comprehensive income before reclassifications (84) 102
Amounts reclassified from accumulated other comprehensive income (323) (315)
Income tax (expense) benefit 107 27
Ending balance 1,075 1,375
Total    
Accumulated Other Comprehensive Income (Loss)    
Beginning balance 1,375 1,370
Ending balance $ 1,075 $ 1,375