Taxes on Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Credit losses not currently deductible	$ 2,925,000				$ 3,055,000				$ 2,925,000	$ 3,055,000
Deferred compensation	1,319,000				1,300,000				1,319,000	1,300,000
Depreciation	178,000				324,000				178,000	324,000
Accrued reserves	95,000				90,000				95,000	90,000
Write-down on other real estate owned	89,000				35,000				89,000	35,000
Unrealized gain on AFS	195,000				196,000				195,000	196,000
Unrealized gain on retirement obligation	155,000				104,000				155,000	104,000
Interest on nonaccrual loans	187,000				29,000				187,000	29,000
Other	830,000				361,000				830,000	361,000
Total deferred tax assets	5,973,000				5,494,000				5,973,000	5,494,000
Deferred tax liabilities:
State Tax	(251,000)				(152,000)				(251,000)	(152,000)
FHLB dividend	(46,000)				(46,000)				(46,000)	(46,000)
Loss on limited partnership investment	(870,000)				(873,000)				(870,000)	(873,000)
Deferred gain ASC 825 – fair value option	(91,000)				(896,000)				(91,000)	(896,000)
Fair value adjustments for purchase accounting	(98,000)				(99,000)				(98,000)	(99,000)
Unrealized loss on TRUPs	(631,000)				0				(631,000)	0
Deferred loan costs	(695,000)				(835,000)				(695,000)	(835,000)
Specific reserve charge-offs	(54,000)				(43,000)				(54,000)	(43,000)
Prepaid expenses	(63,000)				(161,000)				(63,000)	(161,000)
Total deferred tax liabilities	(2,799,000)				(3,105,000)				(2,799,000)	(3,105,000)
Net deferred tax assets	3,174,000				2,389,000				3,174,000	2,389,000
Federal
Current									3,890,000	4,745,000	$ 2,642,000
Deferred									(314,000)	(881,000)	941,000
Total Federal Income Taxes									3,576,000	3,864,000	3,583,000
State
Current									2,227,000	1,388,000	28,000
Deferred									(471,000)	1,787,000	1,258,000
Total State Income Taxes									1,756,000	3,175,000	1,286,000
Total
Current									6,117,000	6,133,000	2,670,000
Deferred									(785,000)	906,000	2,199,000
Total Income Taxes	1,254,000	$ 1,424,000	$ 1,373,000	$ 1,280,000	$ 2,354,000	$ 1,840,000	$ 1,691,000	$ 1,155,000	$ 5,332,000	$ 7,039,000	$ 4,869,000
Reconciliation of the statutory federal income tax rate [Abstract]
Statutory federal income tax rate									21.00%	34.00%	34.00%
State franchise tax, net of federal income tax benefit									7.20%	6.20%	6.90%
Tax Cuts and Jobs Act impact on deferred re-measurement									0.00%	6.30%	0.00%
Other									(0.70%)	(1.60%)	(1.20%)
Total (percent)									27.50%	44.90%	39.70%
Operating Loss Carryforwards [Line Items]
Tax Cuts And Jobs Act Of 2017, provisional income tax expense										$ 986,000
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0								$ 0
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 0								$ 0