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12. Employee and Director Benefit Programs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Benefit obligation at beginning of period	$ 4,566	$ 4,361
Service cost	299	362	$ 348
Interest cost	58	70	68
Benefits paid	(223)	(227)
Benefit obligation at end of period	$ 4,700	$ 4,566	$ 4,361

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Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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