Loans Loan Categories and Past Due Loans(Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30-59 Days	$ 8,194	$ 5,651
Loans Past Due 60-89 Days	1,069	3,203
Loans Past Due 90 or more Days	2,636	4,151
Total Loans Past Due	11,899	13,005
Current Loans	1,741,369	1,560,947
Total Loans	1,753,268	1,573,952
Loans 90 or More Days Past Due and Still Accruing Interest	1,201	187
Nonaccrual Loans	4,193	6,433
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30-59 Days	112	98
Loans Past Due 60-89 Days	29	186
Loans Past Due 90 or more Days	148	203
Total Loans Past Due	289	487
Current Loans	104,866	102,100
Total Loans	105,155	102,587
Loans 90 or More Days Past Due and Still Accruing Interest	0	0
Nonaccrual Loans	155	387
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30-59 Days	121	0
Loans Past Due 60-89 Days	0	0
Loans Past Due 90 or more Days	0	1,469
Total Loans Past Due	121	1,469
Current Loans	431,525	383,470
Total Loans	431,646	384,939
Loans 90 or More Days Past Due and Still Accruing Interest	0	0
Nonaccrual Loans	875	2,401
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30-59 Days	5,593	4,598
Loans Past Due 60-89 Days	898	1,647
Loans Past Due 90 or more Days	513	295
Total Loans Past Due	7,004	6,540
Current Loans	530,357	457,983
Total Loans	537,361	464,523
Loans 90 or More Days Past Due and Still Accruing Interest	158	0
Nonaccrual Loans	589	450
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30-59 Days	2,368	955
Loans Past Due 60-89 Days	142	1,370
Loans Past Due 90 or more Days	1,975	2,184
Total Loans Past Due	4,485	4,509
Current Loans	674,621	617,394
Total Loans	679,106	621,903
Loans 90 or More Days Past Due and Still Accruing Interest	1,043	187
Nonaccrual Loans	$ 2,574	$ 3,195