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11. Employee and Director Benefit Programs (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Employee And Director Benefit Programs Details 1      
Benefit obligation $ 4,361 $ 4,174 $ 3,993
Fair value of plan assets 0 0  
Funded status (4,361) (4,174)  
Unrecognized prior service cost/benefit 0 0  
Unrecognized net actuarial loss 0 0  
Net amount recognized (4,361) (4,174)  
Unfunded accrued liability (4,361) (4,174)  
Intangible assets 0 0  
Net amounts recognized $ (4,361) $ (4,174)