Loans, Receivables Past Due (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Non performing loans [Abstract]
90+ and Still Accruing		$ 0	$ 0
Non-Accrual		9,016	13,364
Total Non-performing Loans		9,016	13,364
Accrued interest included in recorded investment		2	0
Aging analysis of loans by class [Abstract]
Total		12,757	15,597
Loans not Past Due		1,663,097	1,597,764
Total loans recorded investment		1,675,854	1,613,361
Accrued interest included in recorded investment		5,107	5,113
Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		3,651	4,257
Accrued interest included in recorded investment		46	45
Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		928	2,659
Accrued interest included in recorded investment		10	19
Loans Past Due, 90+ days [Member]
Non performing loans [Abstract]
Accrued interest included in recorded investment		0	0
Aging analysis of loans by class [Abstract]
Total		8,178	8,681
Accrued interest included in recorded investment		2	0
Loans Past Due Total [Member]
Aging analysis of loans by class [Abstract]
Accrued interest included in recorded investment		58	64
Loans Not Past Due [Member]
Aging analysis of loans by class [Abstract]
Accrued interest included in recorded investment		5,049	5,049
Commercial [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		817,456	805,995
Accrued interest included in recorded investment		1,972	1,978
Commercial [Member] | Income Producing - Real Estate [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		579	628
Total Non-performing Loans		579	628
Aging analysis of loans by class [Abstract]
Total		448	383
Loans not Past Due		281,597	287,255
Total loans recorded investment		282,045	287,638
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		0	0
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		30	0
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		418	383
Commercial [Member] | Land, Land Development and Construction - Real Estate [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		4	105
Total Non-performing Loans		4	105
Aging analysis of loans by class [Abstract]
Total		0	105
Loans not Past Due		53,649	51,670
Total loans recorded investment		53,649	51,775
Commercial [Member] | Land, Land Development and Construction - Real Estate [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		0	74
Commercial [Member] | Land, Land Development and Construction - Real Estate [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		0	0
Commercial [Member] | Land, Land Development and Construction - Real Estate [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		0	31
Commercial [Member] | Commercial and Industrial [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		742	4,430
Total Non-performing Loans		742	4,430
Aging analysis of loans by class [Abstract]
Total		549	1,551
Loans not Past Due		481,213	465,031
Total loans recorded investment		481,762	466,582
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		366	100
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		114	1,385
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		69	66
Mortgage [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		583,394	540,979
Accrued interest included in recorded investment	[1]	2,364	2,364
Mortgage [Member] | 1-4 Family [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		4,950	5,248
Total Non-performing Loans		4,950	5,248
Aging analysis of loans by class [Abstract]
Total		7,705	8,478
Loans not Past Due		357,881	306,063
Total loans recorded investment		365,586	314,541
Accrued interest included in recorded investment	[1]	1,535	1,466
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		2,169	2,361
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		586	869
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		4,950	5,248
Mortgage [Member] | Resort Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		1,414	1,507
Total Non-performing Loans		1,414	1,507
Aging analysis of loans by class [Abstract]
Total		1,572	1,507
Loans not Past Due		98,371	101,541
Total loans recorded investment		99,943	103,048
Accrued interest included in recorded investment	[1]	381	450
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		137	0
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		21	0
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		1,414	1,507
Mortgage [Member] | Home Equity - 1st Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		208	222
Total Non-performing Loans		208	222
Aging analysis of loans by class [Abstract]
Total		341	371
Loans not Past Due		30,596	28,645
Total loans recorded investment		30,937	29,016
Accrued interest included in recorded investment	[1]	123	111
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		133	149
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		0	0
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		208	222
Mortgage [Member] | Home Equity - 2nd Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		290	317
Total Non-performing Loans		290	317
Aging analysis of loans by class [Abstract]
Total		707	1,005
Loans not Past Due		48,280	54,232
Total loans recorded investment		48,987	55,237
Accrued interest included in recorded investment	[1]	213	226
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		385	470
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		32	218
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		290	317
Mortgage [Member] | Purchased Loans [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		0	0
Total Non-performing Loans		0	0
Aging analysis of loans by class [Abstract]
Total		4	15
Loans not Past Due		37,937	39,122
Total loans recorded investment		37,941	39,137
Accrued interest included in recorded investment	[1]	112	111
Mortgage [Member] | Purchased Loans [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		3	13
Mortgage [Member] | Purchased Loans [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		1	2
Mortgage [Member] | Purchased Loans [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		0	0
Installment [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		275,004	266,387
Accrued interest included in recorded investment	[1]	771	771
Installment [Member] | Home Equity - 1st Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		184	266
Total Non-performing Loans		184	266
Aging analysis of loans by class [Abstract]
Total		299	625
Loans not Past Due		11,569	12,025
Total loans recorded investment		11,868	12,650
Accrued interest included in recorded investment	[1]	51	54
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		91	311
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		24	48
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		184	266
Installment [Member] | Home Equity - 2nd Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		350	289
Total Non-performing Loans		350	289
Aging analysis of loans by class [Abstract]
Total		528	568
Loans not Past Due		12,115	13,390
Total loans recorded investment		12,643	13,958
Accrued interest included in recorded investment	[1]	52	59
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		100	238
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		78	41
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		350	289
Installment [Member] | Boat Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		129	219
Total Non-performing Loans		129	219
Aging analysis of loans by class [Abstract]
Total		217	436
Loans not Past Due		107,826	102,489
Total loans recorded investment		108,043	102,925
Accrued interest included in recorded investment	[1]	267	264
Installment [Member] | Boat Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		85	184
Installment [Member] | Boat Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		3	33
Installment [Member] | Boat Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		129	219
Installment [Member] | Recreational Vehicle Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		26	21
Total Non-performing Loans		26	21
Aging analysis of loans by class [Abstract]
Total		70	122
Loans not Past Due		78,698	74,413
Total loans recorded investment		78,768	74,535
Accrued interest included in recorded investment	[1]	205	203
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		42	68
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		2	33
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		26	21
Installment [Member] | Other [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		140	112
Total Non-performing Loans		140	112
Aging analysis of loans by class [Abstract]
Total		317	431
Loans not Past Due		63,365	61,888
Total loans recorded investment		63,682	62,319
Accrued interest included in recorded investment	[1]	196	191
Installment [Member] | Other [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		140	289
Installment [Member] | Other [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		37	30
Installment [Member] | Other [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		$ 140	$ 112

[1] Credit scores have been updated within the last twelve months.