Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes		$ 225	$ 132
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1],[2]	70	(1)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1],[2]	0	(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]
Gain on sale of investments, net	[2]	0	(1)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Available-for-sale Securities | Related income tax expense
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	[2]	0	0
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1],[3]	70	0
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]
Compensation and employee benefits	[3]	(90)	0
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Plan | Related income tax expense
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	[3]	$ 20	$ 0

[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 10, "Employee Benefits" for additional details.