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11. Employee and Director Benefit Programs (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee And Director Benefit Programs Details 2Abstract
Service cost	$ 362	$ 348	$ 346
Interest cost	70	68	67
Net periodic cost	$ 432	$ 416	$ 413
Weighted average discount rate assumption used to determine benefit obligation	5.49%	5.49%	5.47%

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Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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