Loans and Allowance for Loan Losses (Details 5) - Consumer loans [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Outstanding commercial and consumer loans which include loans on nonaccrual status
Current	$ 486,463	$ 476,962
30-59 days past due	2,238	1,075
60-89 days past due	125	1,126
Greater than 90 days	851	954
Total consumer loans	489,677	480,117
Other [Member]
Outstanding commercial and consumer loans which include loans on nonaccrual status
Current	23,317	22,506
30-59 days past due	105	69
60-89 days past due
Greater than 90 days
Total consumer loans	23,422	22,575
Real estate [Member]
Outstanding commercial and consumer loans which include loans on nonaccrual status
Current	274,302	271,284
30-59 days past due	1,304	681
60-89 days past due	125	131
Greater than 90 days		954
Total consumer loans	275,731	273,050
Home equity [Member]
Outstanding commercial and consumer loans which include loans on nonaccrual status
Current	153,827	154,821
30-59 days past due	829	325
60-89 days past due		995
Greater than 90 days	851
Total consumer loans	155,507	156,141
Construction [Member]
Outstanding commercial and consumer loans which include loans on nonaccrual status
Current	35,017	28,351
30-59 days past due
60-89 days past due
Greater than 90 days
Total consumer loans	$ 35,017	$ 28,351