Employee and Director Benefit Plans (Details) $ in Thousands				3 Months Ended	12 Months Ended
	Mar. 29, 2018 USD ($) employee item	May 18, 2016	Jan. 27, 2016	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) employee item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Purchase of additional bank owned life insurance						$ 3,000
401(k) [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
401(k) eligibility criteria					The Company maintains a 401(k) savings plan covering employees who have completed three months of service and attained age 21.
Defined contribution plan, description					For the 401(k) component, the Company makes a matching contribution equal to 40% of the participant salary deferral, up to 6% of such employee's compensation after one year of service.
Maximum employee contribution of employee gross pay					75.00%
Defined contribution plan, employer matching percentage of employee deferral					40.00%
Defined contribution plan cost recognized					$ 523	485	$ 434
401(k) [Member] | Maximum [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Defined contribution plan, employer discretionary matching contribution , percent					6.00%
Profit Sharing [Member] | Maximum [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Defined contribution plan, employer discretionary matching contribution , percent					5.10%
Safe Harbor Discretionary Employer Contribution [Member] | Maximum [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Defined contribution plan, employer discretionary matching contribution , percent					3.40%
1999 Supplemental Benefit Plans [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Cash surrender value of life insurance				$ 7,400	$ 7,600	7,400
Benefit obligation				$ 1,000	$ 832	$ 1,000
Discount rate for projected benefit obligation				6.17%	6.17%	6.17%
Defined benefit plan description					Effective October 1, 1999, the Company initiated a non-qualified Executive Supplemental Benefit Plan and a non-qualified Directors Supplemental Benefit Plan (the "1999 Plans"). Both plans are unfunded and provide a predefined annual benefit to be paid to executives and directors for fifteen years upon their retirement. The Company can set aside assets to fund the liability which will be subject to claims of the Company's creditors upon liquidation of the Company. The Company has purchased bank owned life insurance for the purpose of funding the liability. The cash surrender value of bank owned life insurance amounted to $7.6 million and $7.4 million at December 31, 2019 and 2018, respectively. Annual benefits increase at a predetermined amount until the executive or director reaches a predetermined retirement age. Predefined benefits are 100% vested at all times and in the event of death, are guaranteed to continue at the full amount to their designated beneficiaries.
Benefit plan postretirement benefit payout period					15 years
Compensation cost					$ 59	$ 69	75
Non-Qualified Executive Supplemental Benefit Plans and Non-Qualified Directors Supplemental Benefit Plan - "The 2001 Plan" [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Benefit obligation				$ 2,300	$ 2,300	$ 2,300
Discount rate for projected benefit obligation				6.17%	6.17%	6.17%
Defined benefit plan description					Effective October 1, 2001, the Company initiated a non-qualified Executive Supplemental Benefit Plan and a non-qualified Director's Supplemental Benefit Plan (collectively, the "2001 Plans"). The Company amended and restated the 2001 plans effective November 1, 2015.
Benefit plan amendment description					Effective January 27, 2016, the Company amended the 2001 Supplemental Benefit Plan for Directors, resulting in a change to the benefit formula from a fixed, pre-determined dollar benefit. The formula provides a benefit equal to a percentage of the director's average pay. The average pay is multiplied by number of years of service, not to exceed 20 years of service or 40% of average final pay. The benefit is payable over a period of fifteen years beginning the month following age 72, unless termination occurs due to disability, death or a change in control. Effective May 18, 2016, the Company amended the 2001 Supplemental Benefit Plan for Executives resulting in a change in the benefit formula from a fixed, pre-determined dollar benefit to a formula-based benefit. The formula provides a benefit equal to a percentage of the executive's average pay. The average pay is multiplied by number of years of service, not to exceed 20 years of service or 40% of average final pay. A reduced benefit is payable if a termination of service occurs prior to age 65. The benefit is payable over a period of fifteen years beginning the month following age 65, unless termination occurs due to disability, death or a change in control.
Supplemental Executive Retirement Plan - 2012 Plan [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Benefit obligation				$ 587	$ 738	$ 587
Discount rate for projected benefit obligation				5.12%	5.12%	5.12%
Defined benefit plan description					Effective June 30, 2012, the Company implemented a Supplemental Executive Benefit Plan (the "2012 Plan") with one executive. The 2012 Plan provides that when the Executive attains age 67, the Executive will be entitled to a fixed, pre-determined annual benefit under the 2012 Plan, which will be paid in monthly installments for 15 years. The 2012 Plan was amended on May 18, 2016 to update the fixed, pre-determined annual benefit amount. The 2012 Plan provides for a reduced benefit in the event the Executive terminates his employment for a reason other than death, disability, cause or a change in control, before the Executive attains the age 67, which will be paid in monthly installments for 15 years. In the event of death, the vested benefit is payable to the beneficiary as a lump sum payment.
Benefit plan, full benefit eligibility retirement age | item					67
Number of executive under supplemental executive benefit plan | employee					1
Benefit plan postretirement benefit payout period					15 years
Non-Qualified Executive Supplemental Benefit Plans and Non-Qualified Directors Supplemental Benefit Plans - "The 2001 and 2012 Plans" [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Cash surrender value of life insurance				$ 11,000	$ 11,300	$ 11,000
Compensation cost					$ 397	404	$ 338
Non-Qualified Supplemental Benefit Plans for Directors 2001 [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Maximum years of service multiplied with average final pay			20 years
Percent applied on average final pay to determine benefit			40.00%
Benefit plan postretirement benefit payout period			15 years
Non-Qualified Executive Supplemental Benefit Plans 2001 [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Defined benefit plan description					Effective May 18, 2016, the Company amended the 2001 Supplemental Benefit Plan for Executives resulting in a change in the benefit formula from a fixed, pre-determined dollar benefit to a formula-based benefit. The formula provides a benefit equal to a percentage of the executive's average pay. The average pay is multiplied by number of years of service, not to exceed 20 years of service or 40% of average final pay. A reduced benefit is payable if a termination of service occurs prior to age 65. The benefit is payable over a period of fifteen years beginning the month following age 65, unless termination occurs due to disability, death or a change in control.
Maximum years of service multiplied with average final pay		20 years
Percent applied on average final pay to determine benefit		40.00%
Benefit plan postretirement benefit payout period		15 years
2018 Retention Agreement [Member]
Defined Contribution And Defined Benefit Plans Disclosure [Line Items]
Cash surrender value of life insurance				3,000	$ 3,100	3,000
Benefit obligation				$ 65	$ 157	$ 65
Discount rate for projected benefit obligation				5.12%	5.12%	5.12%
Defined benefit plan description					Effective March 29, 2018, the Company entered into a Retention Agreement with one executive. The agreement provides that the Executive will receive a payment of $1.4 million (the "Normal Retention Payment") provided that the Executive remains continuously employed with the Bank through March 29, 2028 (the "Retention Date"). The Normal Retention Payment will be paid in three equal installments on March 29, 2028, January 2, 2029, and January 2, 2030. If the Executive's employment is terminated without cause or for good reason (as defined in the agreement) prior to the Retention Date, the Executive will receive the vested account balance as set forth in the agreement. In the event that the Executive's employment terminates prior to the Retention Date due to death or disability, the Executive or his beneficiary, as applicable, will generally receive the vested account balance. If the Executive's employment is terminated prior to the Retention Date, and within two years of a change in control (as defined in the agreement), the Executive will receive the Normal Retention Payment in a lump sum payment.
Aggregate amount payable under retention agreement	$ 1,400
Compensation cost					$ 92	$ 65
Bank owned life insurance				$ 3,000
Number Of Equal Payment Installments | item	3
Number of executives under retention agreement | employee	1