Loans, Impaired Financing Receivables (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2017		Jun. 30, 2016	[2]	Jun. 30, 2017		Jun. 30, 2016	[3]	Dec. 31, 2016
Impaired loan with no allocated allowance [Abstract]
TDR		$ 602				$ 602				$ 1,782
Non - TDR		0				0				1,107
Impaired loans with an allocated allowance [Abstract]
TDR allowances based on collateral		2,375				2,375				3,527
TDR - allowances based on present value cash flow		68,350				68,350				72,613
Non - TDR - allowance based on collateral		262				262				491
Total impaired loans		71,589				71,589				79,520
Amount of allowance for loan losses allocated [Abstract]
TDR - allowance based on collateral		683				683				1,868
TDR - allowance based on present value cash flow		6,525				6,525				7,146
Non - TDR - allowance based on collateral		36				36				138
Allowance for loan losses allocated		7,244				7,244				9,152
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	606				606				2,891
Unpaid Principal Balance, with no related allowance	[1]	1,339				1,339				5,191
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	71,288				71,288				76,940
Unpaid Principal Balance, with an allowance recorded	[1]	73,416				73,416				79,520
Recorded Investment	[1]	71,894				71,894				79,831
Unpaid Principal Balance	[1]	74,755				74,755				84,711
Related Allowance	[1]	7,244				7,244				9,152
Accrued interest included in recorded investment	[1]	305				305				311
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		489	[2]	$ 1,636		1,289	[3]	$ 1,999
Interest Income Recognized, with No Related Allowance		15	[2]	5		20	[3]	37
Average Recorded Investment, with Related Allowance		72,193	[2]	85,773		73,774	[3]	85,983
Interest Income Recognized, with Related Allowance		866	[2]	905		1,714	[3]	1,808
Average Recorded Investment		72,682	[2]	87,409		75,063	[3]	87,982
Interest Income Recognized		881	[2]	910		1,734	[3]	1,845
Commercial [Member] | Income Producing - Real Estate [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				517
Unpaid Principal Balance, with no related allowance	[1]	0				0				768
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	7,647				7,647				7,737
Unpaid Principal Balance, with an allowance recorded	[1]	7,835				7,835				7,880
Recorded Investment	[1]	7,647				7,647				8,254
Unpaid Principal Balance	[1]	7,835				7,835				8,648
Related Allowance	[1]	594				594				554
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		185	[2]	673		296	[3]	662
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	2
Average Recorded Investment, with Related Allowance		7,694	[2]	8,210		7,708	[3]	8,266
Interest Income Recognized, with Related Allowance		104	[2]	100		209	[3]	207
Average Recorded Investment		7,879	[2]	8,883		8,004	[3]	8,928
Interest Income Recognized		104	[2]	100		209	[3]	209
Commercial [Member] | Land, Land Development and Construction - Real Estate [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				31
Unpaid Principal Balance, with no related allowance	[1]	0				0				709
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	172				172				239
Unpaid Principal Balance, with an allowance recorded	[1]	199				199				244
Recorded Investment	[1]	172				172				270
Unpaid Principal Balance	[1]	199				199				953
Related Allowance	[1]	11				11				36
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	335		10	[3]	496
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	7
Average Recorded Investment, with Related Allowance		170	[2]	1,664		193	[3]	1,673
Interest Income Recognized, with Related Allowance		2	[2]	13		4	[3]	26
Average Recorded Investment		170	[2]	1,999		203	[3]	2,169
Interest Income Recognized		2	[2]	13		4	[3]	33
Commercial [Member] | Commercial and Industrial [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	354				354				2,341
Unpaid Principal Balance, with no related allowance	[1]	352				352				3,261
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	3,178				3,178				4,902
Unpaid Principal Balance, with an allowance recorded	[1]	3,256				3,256				5,246
Recorded Investment	[1]	3,532				3,532				7,243
Unpaid Principal Balance	[1]	3,608				3,608				8,507
Related Allowance	[1]	489				489				1,654
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		177	[2]	609		898	[3]	821
Interest Income Recognized, with No Related Allowance		8	[2]	0		8	[3]	21
Average Recorded Investment, with Related Allowance		3,237	[2]	6,203		3,792	[3]	5,501
Interest Income Recognized, with Related Allowance		37	[2]	59		72	[3]	82
Average Recorded Investment		3,414	[2]	6,812		4,690	[3]	6,322
Interest Income Recognized		45	[2]	59		80	[3]	103
Mortgage [Member] | 1-4 Family [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	251				251				2
Unpaid Principal Balance, with no related allowance	[1]	915				915				387
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	39,194				39,194				41,701
Unpaid Principal Balance, with an allowance recorded	[1]	40,728				40,728				43,479
Recorded Investment	[1]	39,445				39,445				41,703
Unpaid Principal Balance	[1]	41,643				41,643				43,866
Related Allowance	[1]	3,590				3,590				4,100
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		126	[2]	11		85	[3]	15
Interest Income Recognized, with No Related Allowance		5	[2]	5		9	[3]	6
Average Recorded Investment, with Related Allowance		39,646	[2]	46,041		40,331	[3]	46,625
Interest Income Recognized, with Related Allowance		494	[2]	475		958	[3]	977
Average Recorded Investment		39,772	[2]	46,052		40,416	[3]	46,640
Interest Income Recognized		499	[2]	480		967	[3]	983
Mortgage [Member] | Resort Lending [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	16,251				16,251				16,898
Unpaid Principal Balance, with an allowance recorded	[1]	16,318				16,318				16,931
Recorded Investment	[1]	16,251				16,251				16,898
Unpaid Principal Balance	[1]	16,318				16,318				16,931
Related Allowance	[1]	2,249				2,249				2,453
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	0		0	[3]	0
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		16,471	[2]	17,689		16,613	[3]	17,842
Interest Income Recognized, with Related Allowance		150	[2]	159		311	[3]	319
Average Recorded Investment		16,471	[2]	17,689		16,613	[3]	17,842
Interest Income Recognized		150	[2]	159		311	[3]	319
Mortgage [Member] | Home Equity - 1st Lien [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	230				230				235
Unpaid Principal Balance, with an allowance recorded	[1]	239				239				242
Recorded Investment	[1]	230				230				235
Unpaid Principal Balance	[1]	239				239				242
Related Allowance	[1]	10				10				10
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	0		0	[3]	0
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		232	[2]	243		233	[3]	218
Interest Income Recognized, with Related Allowance		2	[2]	2		4	[3]	4
Average Recorded Investment		232	[2]	243		233	[3]	218
Interest Income Recognized		2	[2]	2		4	[3]	4
Mortgage [Member] | Home Equity - 2nd Lien [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	180				180				315
Unpaid Principal Balance, with an allowance recorded	[1]	214				214				398
Recorded Investment	[1]	180				180				315
Unpaid Principal Balance	[1]	214				214				398
Related Allowance	[1]	24				24				16
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	0		0	[3]	0
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		186	[2]	181		229	[3]	202
Interest Income Recognized, with Related Allowance		1	[2]	4		3	[3]	5
Average Recorded Investment		186	[2]	181		229	[3]	202
Interest Income Recognized		1	[2]	4		3	[3]	5
Installment [Member] | Home Equity - 1st Lien [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	1				1				0
Unpaid Principal Balance, with no related allowance	[1]	72				72				66
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	1,825				1,825				1,994
Unpaid Principal Balance, with an allowance recorded	[1]	1,952				1,952				2,117
Recorded Investment	[1]	1,826				1,826				1,994
Unpaid Principal Balance	[1]	2,024				2,024				2,183
Related Allowance	[1]	87				87				118
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		1	[2]	1		0	[3]	0
Interest Income Recognized, with No Related Allowance		2	[2]	0		3	[3]	1
Average Recorded Investment, with Related Allowance		1,855	[2]	2,230		1,901	[3]	2,274
Interest Income Recognized, with Related Allowance		33	[2]	42		67	[3]	84
Average Recorded Investment		1,856	[2]	2,231		1,901	[3]	2,274
Interest Income Recognized		35	[2]	42		70	[3]	85
Installment [Member] | Home Equity - 2nd Lien [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	2,147				2,147				2,415
Unpaid Principal Balance, with an allowance recorded	[1]	2,173				2,173				2,443
Recorded Investment	[1]	2,147				2,147				2,415
Unpaid Principal Balance	[1]	2,173				2,173				2,443
Related Allowance	[1]	165				165				182
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	7		0	[3]	5
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		2,228	[2]	2,751		2,290	[3]	2,810
Interest Income Recognized, with Related Allowance		35	[2]	41		70	[3]	85
Average Recorded Investment		2,228	[2]	2,758		2,290	[3]	2,815
Interest Income Recognized		35	[2]	41		70	[3]	85
Installment [Member] | Boat Lending [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	1				1				1
Unpaid Principal Balance, with an allowance recorded	[1]	6				6				6
Recorded Investment	[1]	1				1				1
Unpaid Principal Balance	[1]	6				6				6
Related Allowance	[1]	1				1				0
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	0		0	[3]	0
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		1	[2]	2		1	[3]	2
Interest Income Recognized, with Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment		1	[2]	2		1	[3]	2
Interest Income Recognized		0	[2]	0		0	[3]	0
Installment [Member] | Recreational Vehicle Lending [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance		0				0				0	[1]
Recorded Investment, with an allowance recorded	[1]	102				102				109
Unpaid Principal Balance, with an allowance recorded	[1]	102				102				108
Recorded Investment	[1]	102				102				109
Unpaid Principal Balance	[1]	102				102				108
Related Allowance	[1]	5				5				6
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	0		0	[3]	0
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		104	[2]	117		106	[3]	119
Interest Income Recognized, with Related Allowance		2	[2]	1		3	[3]	3
Average Recorded Investment		104	[2]	117		106	[3]	119
Interest Income Recognized		2	[2]	1		3	[3]	3
Installment [Member] | Other [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	0				0				0
Unpaid Principal Balance, with no related allowance	[1]	0				0				0
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	361				361				394
Unpaid Principal Balance, with an allowance recorded	[1]	394				394				426
Recorded Investment	[1]	361				361				394
Unpaid Principal Balance	[1]	394				394				426
Related Allowance	[1]	19				19				$ 23
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	0		0	[3]	0
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		369	[2]	442		377	[3]	451
Interest Income Recognized, with Related Allowance		6	[2]	9		13	[3]	16
Average Recorded Investment		369	[2]	442		377	[3]	451
Interest Income Recognized		$ 6	[2]	$ 9		$ 13	[3]	$ 16

[1] There were no impaired purchased mortgage loans at June 30, 2017 or December 31, 2016.

[2] There were no impaired purchased mortgage loans during the three month periods ended June 30, 2017 and 2016, respectively.

[3] There were no impaired purchased mortgage loans during the six month periods ended June 30, 2017 and 2016, respectively.