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AOCI (Tables)
 12 Months Ended
Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of accumulated other comprehensive income
 
Hedging Derivative Activities
 
Post Retirement Benefit Plan Items(A)
 
Total
2018:
 
 
 
 
 
Balance at January 1, 2018
$
(197,000
)
 
$
2,267,000

 
$
2,070,000

Other comprehensive income before reclassifications
(608,000
)
 
910,000

 
302,000

Amounts reclassified from accumulated other comprehensive income
91,000

 
(325,000
)
 
(234,000
)
Income tax (expense) benefit
102,000

 
(123,000
)
 
(21,000
)
Balance at December 31, 2018
$
(612,000
)
 
$
2,729,000

 
$
2,117,000

 
 
 
 
 
 
2019:
 
 
 
 
 
Balance at January 1, 2019
$
(612,000
)
 
$
2,729,000

 
$
2,117,000

Other comprehensive income before reclassifications
791,000

 
(1,102,000
)
 
(311,000
)
Amounts reclassified from accumulated other comprehensive income
(230,000
)
 
(379,000
)
 
(609,000
)
Income tax (expense) benefit
(140,000
)
 
313,000

 
173,000

Balance at December 31, 2019
$
(191,000
)
 
$
1,561,000

 
$
1,370,000