Employee Benefits (Detail Textuals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule Of Employee Benefits [Line Items]
Percentage of internal revenue contribution			25.00%
Percentage of internal revenue service limitations			6.00%
Cash surrender value of life insurance	$ 18,218		$ 18,218		$ 18,018
Increase in cash surrender value of insurance	99	$ 100	200	$ 199
Accrued expenses and other liabilities	10,573		10,573		10,108
Noninterest expense	7,048	$ 6,401	13,966	12,767
Employer contribution in defined contribution plan			442	378	570
Net earnings on Bank Owned Life Insurance			200	199
Directors' Plan
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	1,918		1,918		1,687
Noninterest expense			62	65
Executive Long-Term Incentive and Retention Plan
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	998		998		975
Noninterest expense			$ 271	175
Executive Long-Term Incentive and Retention Plan | Maximum
Schedule Of Employee Benefits [Line Items]
Terms of services			5 years
Executive Long-Term Incentive and Retention Plan | Minimum
Schedule Of Employee Benefits [Line Items]
Terms of services			1 year
Group Term Replacement Plan
Schedule Of Employee Benefits [Line Items]
Liability related to these postretirement benefits	1,303		$ 1,303		1,276
Postemployment benefit expense			26	26
Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Noninterest expense			48	$ 51
Liability related to these postretirement benefits	$ 2,124		$ 2,124		$ 2,108
Other Director and Officer Postretirement Benefits | Maximum
Schedule Of Employee Benefits [Line Items]
Post retirement benefit period			20 years
Other Director and Officer Postretirement Benefits | Minimum
Schedule Of Employee Benefits [Line Items]
Post retirement benefit period			15 years