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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 10,067	$ 9,260	$ 27,735	$ 27,521
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Securities Holding Gains (Losses) Arising During the Period	499	(897)	4,323	(4,017)
Amortization of Net Retirement Plan Actuarial Loss	127	60	381	181
Amortization of Net Retirement Plan Prior Service Cost	42	20	127	60
Other Comprehensive Income (Loss)	668	(817)	4,831	(3,776)
Comprehensive Income	$ 10,735	$ 8,443	$ 32,566	$ 23,745

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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