Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision for income taxes		$ 305	$ 147	$ 530	$ 279
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total reclassifications for the period	[1]	(101)	(148)	(172)	(149)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total reclassifications for the period	[1],[2]	(31)	0	(31)	(1)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Available-for-sale Securities | Net securities losses reclassified into earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized loss on sales and calls of securities	[1],[2]	(40)	0	(40)	(1)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Available-for-sale Securities | Related income tax expense
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision for income taxes	[1],[2]	9	0	9	0
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total reclassifications for the period	[1],[3]	(70)	(148)	(141)	(148)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Plan | Amortization of net loss and prior service costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized loss on sales and calls of securities	[1],[3]			(179)	(187)
Salaries and employee benefits	[1],[3]	(89)	(187)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Plan | Related income tax expense
Accumulated Other Comprehensive Income (Loss) [Line Items]
Provision for income taxes	[1],[3]	$ 19	$ 39	$ 38	$ 39

[1] All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate of 21.0 %.

[2] For additional details related to unrealized gains and losses on securities and related amounts reclassified from accumulated other comprehensive loss see Note 2, "Investment Securities."

[3] Included in the computation of net periodic pension cost. See Note 9, "Employee Benefits" for additional details.