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ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassification of component (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Realized (gains) losses on sale of securities      
Net realized (gains) losses on investment securities $ (84,000)   $ (118,000)
Provision for income taxes 18,000   25,000
Net of tax (66,000)   (93,000)
Amortization of estimated defined benefit pension plan loss      
Other expense (4,157,000) $ (2,453,000) (1,649,000)
Provision for income taxes (873,000) (515,000) (346,000)
Net of tax 3,284,000 1,938,000 1,303,000
Total reclassifications for the period $ 3,218,000 $ 1,938,000 $ 1,210,000