Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income: Before Tax Amount		$ 1,931	$ 1,603	$ 3,334	$ 2,859
Net Income: Tax Effect		(86)	372	(76)	443
Net income: Net-of-Tax Amount		1,845	1,975	3,258	3,302
Other comprehensive income (loss):
Unrealized holding gains (losses) arising during the period: Before Tax Amount		1,722	(528)	3,515	(2,695)
Unrealized holding gains (losses) arising during the period: Tax Effect		(361)	111	(738)	566
Unrealized holding gains (losses) arising during the period: Net-of-Tax Amount		1,361	(417)	2,777	(2,129)
Unrealized holding gains from unconsolidated subsidiary: Before Tax Amount			16		5
Unrealized holding gains from unconsolidated subsidiary: Net-of-Tax Amount			16		5
Pension net gain: Before Tax Amount		2,634		2,634
Pension net gain: Tax Effect		(553)		(553)
Pension net gain: Net-of-Tax Amount		2,081		2,081
Pension loss due to change in assumptions: Before Tax Amount		(1,478)		(1,478)
Pension loss due to change in assumptions: Tax Effect		310		310
Pension loss due to change in assumptions: Net-of-Tax Amount		(1,168)		(1,168)
Less reclassification adjustment for losses included in net income for sales of debt securities: Before Tax Amount	[1],[2]			56	15
Less reclassification adjustment for losses (gains) included in net income for sales of debt securities: Tax Effect	[1],[2]			(12)	(3)
Less reclassification adjustment for losses (gains) included in net income for sales of debt securities: Net-of-Tax Amount	[1],[2]			44	12
Amortization of pension net actuarial loss: Before Tax Amount	[2],[3]	306	40	334	81
Amortization of net pension actuarial loss: Tax Effect	[2],[3]	(65)	(8)	(70)	(17)
Amortization of net pension actuarial loss: Net-of-Tax Amount	[2],[3]	241	32	264	64
Other comprehensive income (loss): Before Tax Amount		3,184	(472)	5,061	(2,594)
Other comprehensive income (loss): Tax Effect		(669)	103	(1,063)	546
Other comprehensive income (loss): Net-of-Tax Amount		2,515	(369)	3,998	(2,048)
Total comprehensive income: Before Tax Amount		5,115	1,131	8,395	265
Total comprehensive income: Tax Effect		(755)	475	(1,139)	989
Total comprehensive income: Net-of-Tax Amount		$ 4,360	$ 1,606	$ 7,256	$ 1,254

[1] Amounts are included in (loss) gain on sales and calls of securities on the consolidated statements of income as a separate element within total non-interest income.

[2] Income tax amounts are included in the provision for income taxes on the consolidated statements of income.

[3] Amounts are included in the computation of net periodic benefit cost and are included in employee benefits expense on the consolidated statements of income as a separate element within total non-interest expense.