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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance $ 93,932 $ 84,426
Other comprehensive loss before reclassifications 0 (1,060)
Amounts reclassified from accumulated other comprehensive income (161) (691)
Income tax benefit 33 383
Ending Balance 102,103 89,452
Derivative Hedging Activities    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance 0 (191)
Other comprehensive loss before reclassifications 0 (1,060)
Amounts reclassified from accumulated other comprehensive income 0 (533)
Income tax benefit 0 350
Ending Balance 0 (1,434)
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 (161) (158)
Income tax benefit 33 33
Ending Balance 1,247 1,436
Accumulated Other Comprehensive Income    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning Balance 1,375 1,370
Ending Balance $ 1,247 $ 2