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Accumulated Other Comprehensive Income (Details) - USD ($)
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Unusual or Infrequent Item, or Both [Line Items]            
Stockholders' Equity Attributable to Parent $ 130,298,000 $ 106,622,000 $ 122,733,000 $ 116,125,000 $ 104,397,000 $ 100,095,000
Other comprehensive loss before reclassifications 2,358,000          
Income tax benefit (223,000) 34,000        
Amounts reclassified from accumulated other comprehensive income 1,332,000 161,000        
Post Retirement Benefit Plan Items            
Unusual or Infrequent Item, or Both [Line Items]            
Stockholders' Equity Attributable to Parent 2,320,000 948,000   2,507,000   1,075,000
Other comprehensive loss before reclassifications 0          
Amounts reclassified from accumulated other comprehensive income (237,000) (161,000)        
Income tax benefit 50,000 34,000        
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]            
Unusual or Infrequent Item, or Both [Line Items]            
Stockholders' Equity Attributable to Parent 1,536,000 0   546,000   0
Other comprehensive loss before reclassifications 2,358,000          
Income tax benefit 273,000 0        
Amounts reclassified from accumulated other comprehensive income (1,095,000) 0        
Accumulated Other Comprehensive Income            
Unusual or Infrequent Item, or Both [Line Items]            
Stockholders' Equity Attributable to Parent $ 3,856,000 $ 948,000 $ 3,101,000 $ 3,053,000 $ 1,011,000 $ 1,075,000