Loans, Receivables Past Due (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Non performing loans [Abstract]
90+ and Still Accruing		$ 0	$ 0
Non-Accrual		8,410	13,364
Total Non-performing Loans		8,410	13,364
Accrued interest included in recorded investment		0	0
Aging analysis of loans by class [Abstract]
Total		13,803	15,597
Loans not Past Due		1,929,260	1,597,764
Total loans recorded investment		1,943,063	1,613,361
Accrued interest included in recorded investment		5,969	5,113
Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		4,455	4,257
Accrued interest included in recorded investment		53	45
Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		1,631	2,659
Accrued interest included in recorded investment		24	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		7,717	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		77	64
Loans Not Past Due [Member]
Aging analysis of loans by class [Abstract]
Accrued interest included in recorded investment		5,892	5,049
Commercial [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		839,330	805,995
Accrued interest included in recorded investment		2,080	1,978
Commercial [Member] | Income Producing - Real Estate [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		72	628
Total Non-performing Loans		72	628
Aging analysis of loans by class [Abstract]
Total		455	383
Loans not Past Due		271,747	287,255
Total loans recorded investment		272,202	287,638
Commercial [Member] | Income Producing - Real Estate [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		425	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		10	105
Loans not Past Due		67,793	51,670
Total loans recorded investment		67,803	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		10	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		706	4,430
Total Non-performing Loans		706	4,430
Aging analysis of loans by class [Abstract]
Total		334	1,551
Loans not Past Due		498,991	465,031
Total loans recorded investment		499,325	466,582
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		120	100
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		149	1,385
Commercial [Member] | Commercial and Industrial [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		65	66
Mortgage [Member]
Aging analysis of loans by class [Abstract]
Total loans recorded investment		784,372	540,979
Accrued interest included in recorded investment	[1]	3,026	2,364
Mortgage [Member] | 1-4 Family [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		5,207	5,248
Total Non-performing Loans		5,207	5,248
Aging analysis of loans by class [Abstract]
Total		8,055	8,478
Loans not Past Due		553,928	306,063
Total loans recorded investment		561,983	314,541
Accrued interest included in recorded investment	[1]	2,134	1,466
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		1,929	2,361
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		919	869
Mortgage [Member] | 1-4 Family [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		5,207	5,248
Mortgage [Member] | Resort Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		1,411	1,507
Total Non-performing Loans		1,411	1,507
Aging analysis of loans by class [Abstract]
Total		1,909	1,507
Loans not Past Due		91,370	101,541
Total loans recorded investment		93,279	103,048
Accrued interest included in recorded investment	[1]	374	450
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		363	0
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		135	0
Mortgage [Member] | Resort Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		1,411	1,507
Mortgage [Member] | Home Equity - 1st Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		258	222
Total Non-performing Loans		258	222
Aging analysis of loans by class [Abstract]
Total		718	371
Loans not Past Due		35,826	28,645
Total loans recorded investment		36,544	29,016
Accrued interest included in recorded investment	[1]	165	111
Mortgage [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		460	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		258	222
Mortgage [Member] | Home Equity - 2nd Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		221	317
Total Non-performing Loans		221	317
Aging analysis of loans by class [Abstract]
Total		1,013	1,005
Loans not Past Due		56,677	54,232
Total loans recorded investment		57,690	55,237
Accrued interest included in recorded investment	[1]	260	226
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		597	470
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		195	218
Mortgage [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		221	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		34,872	39,122
Total loans recorded investment		34,876	39,137
Accrued interest included in recorded investment	[1]	93	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		319,361	266,387
Accrued interest included in recorded investment	[1]	863	771
Installment [Member] | Home Equity - 1st Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		97	266
Total Non-performing Loans		97	266
Aging analysis of loans by class [Abstract]
Total		298	625
Loans not Past Due		9,925	12,025
Total loans recorded investment		10,223	12,650
Accrued interest included in recorded investment	[1]	42	54
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		115	311
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		86	48
Installment [Member] | Home Equity - 1st Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		97	266
Installment [Member] | Home Equity - 2nd Lien [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		224	289
Total Non-performing Loans		224	289
Aging analysis of loans by class [Abstract]
Total		408	568
Loans not Past Due		10,103	13,390
Total loans recorded investment		10,511	13,958
Accrued interest included in recorded investment	[1]	44	59
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		161	238
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		23	41
Installment [Member] | Home Equity - 2nd Lien [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		224	289
Installment [Member] | Boat Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		69	219
Total Non-performing Loans		69	219
Aging analysis of loans by class [Abstract]
Total		250	436
Loans not Past Due		131,153	102,489
Total loans recorded investment		131,403	102,925
Accrued interest included in recorded investment	[1]	322	264
Installment [Member] | Boat Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		112	184
Installment [Member] | Boat Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		69	33
Installment [Member] | Boat Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		69	219
Installment [Member] | Recreational Vehicle Lending [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		25	21
Total Non-performing Loans		25	21
Aging analysis of loans by class [Abstract]
Total		81	122
Loans not Past Due		93,687	74,413
Total loans recorded investment		93,768	74,535
Accrued interest included in recorded investment	[1]	236	203
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		52	68
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		4	33
Installment [Member] | Recreational Vehicle Lending [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		25	21
Installment [Member] | Other [Member]
Non performing loans [Abstract]
90+ and Still Accruing		0	0
Non-Accrual		110	112
Total Non-performing Loans		110	112
Aging analysis of loans by class [Abstract]
Total		268	431
Loans not Past Due		73,188	61,888
Total loans recorded investment		73,456	62,319
Accrued interest included in recorded investment	[1]	219	191
Installment [Member] | Other [Member] | Loans Past Due, 30-59 days [Member]
Aging analysis of loans by class [Abstract]
Total		108	289
Installment [Member] | Other [Member] | Loans Past Due, 60-89 days [Member]
Aging analysis of loans by class [Abstract]
Total		50	30
Installment [Member] | Other [Member] | Loans Past Due, 90+ days [Member]
Aging analysis of loans by class [Abstract]
Total		$ 110	$ 112

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