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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance $ 93,932 $ 84,426
Other comprehensive loss before reclassifications 0 (71)
Amounts reclassified from accumulated other comprehensive income (242) (1,171)
Income tax benefit 51 273
Ending Balance 99,292 93,529
Derivative Hedging Activities    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance 0 (191)
Other comprehensive loss before reclassifications 0 (71)
Amounts reclassified from accumulated other comprehensive income 0 (935)
Income tax benefit 0 223
Ending Balance 0 (974)
Post Retirement Benefit Plan Items    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance 1,375 1,561
Other comprehensive loss before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive income (242) (236)
Income tax benefit 51 50
Ending Balance 1,184 1,375
Accumulated Other Comprehensive Income    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance 1,375 1,370
Ending Balance $ 1,184 $ 401