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Other Comprehensive Income (Loss) (Details) - Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
COMPREHENSIVE INCOME (Details) - Comprehensive Income (Loss) [Line Items]
Sale of securities available-for-sale Net gains on sale of securities available for sale	$ 415	$ (523)	$ 1,332	$ 1,551
Sale of securities available-for-sale Income tax expense	(165)	187	(525)	(634)
Total reclassification	382	5,045	17	5,333
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		4,131	1,596	4,234
Sale of securities available-for-sale Income tax expense		(1,640)	(579)	(1,682)
Sale of securities available-for-sale		2,491	1,017	2,552
Amortization of pension plan net actuarial losses Salaries and employee benefits	(103)	(204)	(309)	(306)
Amortization of pension plan net actuarial losses Income tax benefit	42	83	126	124
Amortization of pension plan net actuarial losses	(61)	(121)	(183)	(182)
Total reclassification	$ (61)	$ 2,370	$ 834	$ 2,370

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