Loans, Receivables Past Due (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Non performing loans [Abstract]
90+ and Still Accruing		$ 0	$ 0
Non-Accrual		8,542	13,364
Total Non-performing Loans		8,542	13,364
Accrued interest included in recorded investment		0	0
Aging analysis of loans by class [Abstract]
Total		13,405	15,597
Loans not Past Due		1,803,708	1,597,764
Total loans recorded investment		1,817,113	1,613,361
Accrued interest included in recorded investment		5,436	5,113
Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		3,669	4,257
Accrued interest included in recorded investment		44	45
Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		1,797	2,659
Accrued interest included in recorded investment		34	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		7,939	8,681
Accrued interest included in recorded investment		0	0
Loans Past Due Total [Member]
Aging analysis of loans by class [Abstract]
Accrued interest included in recorded investment		78	64
Loans Not Past Due [Member]
Aging analysis of loans by class [Abstract]
Accrued interest included in recorded investment		5,358	5,049
Commercial [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		830,793	805,995
Accrued interest included in recorded investment		2,015	1,978
Commercial [Member] | Income Producing - Real Estate [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		203	628
Total Non-performing Loans		203	628
Aging analysis of loans by class [Abstract]
Total		66	383
Loans not Past Due		280,018	287,255
Total loans recorded investment		280,084	287,638
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		36	0
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		0	0
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		30	383
Commercial [Member] | Land, Land Development and Construction - Real Estate [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		10	105
Total Non-performing Loans		10	105
Aging analysis of loans by class [Abstract]
Total		0	105
Loans not Past Due		58,353	51,670
Total loans recorded investment		58,353	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		541	4,430
Total Non-performing Loans		541	4,430
Aging analysis of loans by class [Abstract]
Total		375	1,551
Loans not Past Due		491,981	465,031
Total loans recorded investment		492,356	466,582
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		254	100
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		0	1,385
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		121	66
Mortgage [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		677,121	540,979
Accrued interest included in recorded investment	[1]	2,622	2,364
Mortgage [Member] | 1-4 Family [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		5,481	5,248
Total Non-performing Loans		5,481	5,248
Aging analysis of loans by class [Abstract]
Total		8,382	8,478
Loans not Past Due		448,747	306,063
Total loans recorded investment		457,129	314,541
Accrued interest included in recorded investment	[1]	1,761	1,466
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		1,894	2,361
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		1,007	869
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		5,481	5,248
Mortgage [Member] | Resort Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		1,043	1,507
Total Non-performing Loans		1,043	1,507
Aging analysis of loans by class [Abstract]
Total		1,443	1,507
Loans not Past Due		94,764	101,541
Total loans recorded investment		96,207	103,048
Accrued interest included in recorded investment	[1]	379	450
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		136	0
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		264	0
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		1,043	1,507
Mortgage [Member] | Home Equity - 1st Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		198	222
Total Non-performing Loans		198	222
Aging analysis of loans by class [Abstract]
Total		334	371
Loans not Past Due		33,697	28,645
Total loans recorded investment		34,031	29,016
Accrued interest included in recorded investment	[1]	137	111
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		60	149
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		76	0
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		198	222
Mortgage [Member] | Home Equity - 2nd Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		312	317
Total Non-performing Loans		312	317
Aging analysis of loans by class [Abstract]
Total		1,133	1,005
Loans not Past Due		52,598	54,232
Total loans recorded investment		53,731	55,237
Accrued interest included in recorded investment	[1]	244	226
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		644	470
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		177	218
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		312	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		9	15
Loans not Past Due		36,014	39,122
Total loans recorded investment		36,023	39,137
Accrued interest included in recorded investment	[1]	101	111
Mortgage [Member] | Purchased Loans [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		5	13
Mortgage [Member] | Purchased Loans [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		4	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		309,199	266,387
Accrued interest included in recorded investment	[1]	799	771
Installment [Member] | Home Equity - 1st Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		203	266
Total Non-performing Loans		203	266
Aging analysis of loans by class [Abstract]
Total		387	625
Loans not Past Due		10,589	12,025
Total loans recorded investment		10,976	12,650
Accrued interest included in recorded investment	[1]	44	54
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		124	311
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		60	48
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		203	266
Installment [Member] | Home Equity - 2nd Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		308	289
Total Non-performing Loans		308	289
Aging analysis of loans by class [Abstract]
Total		611	568
Loans not Past Due		10,791	13,390
Total loans recorded investment		11,402	13,958
Accrued interest included in recorded investment	[1]	49	59
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		163	238
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		140	41
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		308	289
Installment [Member] | Boat Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		93	219
Total Non-performing Loans		93	219
Aging analysis of loans by class [Abstract]
Total		278	436
Loans not Past Due		126,150	102,489
Total loans recorded investment		126,428	102,925
Accrued interest included in recorded investment	[1]	291	264
Installment [Member] | Boat Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		173	184
Installment [Member] | Boat Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		12	33
Installment [Member] | Boat Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		93	219
Installment [Member] | Recreational Vehicle Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		20	21
Total Non-performing Loans		20	21
Aging analysis of loans by class [Abstract]
Total		83	122
Loans not Past Due		89,132	74,413
Total loans recorded investment		89,215	74,535
Accrued interest included in recorded investment	[1]	215	203
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		50	68
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		13	33
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		20	21
Installment [Member] | Other [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		130	112
Total Non-performing Loans		130	112
Aging analysis of loans by class [Abstract]
Total		304	431
Loans not Past Due		70,874	61,888
Total loans recorded investment		71,178	62,319
Accrued interest included in recorded investment	[1]	200	191
Installment [Member] | Other [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		130	289
Installment [Member] | Other [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		44	30
Installment [Member] | Other [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		$ 130	$ 112

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