Comprehensive Income (Details) - Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
COMPREHENSIVE INCOME (Details) - Comprehensive Income (Loss) [Line Items]
Sale of securities available-for-sale Net gains on sale of securities available-for-sale	$ (5,440)	$ 6,252
Sale of securities available-for-sale Income tax expense	1,432	(1,691)
Net interest income on swaps - Borrowings	(631)	(7)
Net interest income on swaps Income tax expense	177	(2)
Net interest income on swaps	454	(5)
Total reclassification	(3,486)	2,611
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) [Member]
COMPREHENSIVE INCOME (Details) - Comprehensive Income (Loss) [Line Items]
Sale of securities available-for-sale Net gains on sale of securities available-for-sale		29
Sale of securities available-for-sale Income tax expense		(6)
Sale of securities available-for-sale		23
Net interest income on swaps - Borrowings	(631)	7
Net interest income on swaps Income tax expense	177	(2)
Net interest income on swaps	(454)	5
Amortization of pension plan net actuarial losses - other components of net periodic pension expense	(75)	(75)
Amortization of pension plan net actuarial losses Income tax benefit	20	21
Amortization of pension plan net actuarial losses	(55)	(54)
Total reclassification	$ (509)	$ (26)