Loans, Impaired Financing Receivables (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2017		Sep. 30, 2016	[2]	Sep. 30, 2017		Sep. 30, 2016	[3]	Dec. 31, 2016
Impaired loan with no allocated allowance [Abstract]
TDR		$ 349				$ 349				$ 1,782
Non - TDR		186				186				1,107
Impaired loans with an allocated allowance [Abstract]
TDR - allowance based on collateral		2,320				2,320				3,527
TDR - allowance based on present value cash flow		65,449				65,449				72,613
Non - TDR - allowance based on collateral		202				202				491
Total impaired loans		68,506				68,506				79,520
Amount of allowance for loan losses allocated [Abstract]
TDR - allowance based on collateral		641				641				1,868
TDR - allowance based on present value cash flow		6,329				6,329				7,146
Non - TDR - allowance based on collateral		91				91				138
Total amount of allowance for loan losses allocated		7,061				7,061				9,152
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	538				538				2,891
Unpaid Principal Balance, with no related allowance	[1]	1,100				1,100				5,191
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	68,256				68,256				76,940
Unpaid Principal Balance, with an allowance recorded	[1]	70,334				70,334				79,520
Recorded Investment	[1]	68,794				68,794				79,831
Unpaid Principal Balance	[1]	71,434				71,434				84,711
Related Allowance	[1]	7,061				7,061				9,152
Accrued interest included in recorded investment	[1]	288				288				311
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		573	[2]	$ 696		1,103	[3]	$ 1,669
Interest Income Recognized, with No Related Allowance		17	[2]	6		37	[3]	43
Average Recorded Investment, with Related Allowance		69,775	[2]	83,676		72,397	[3]	84,839
Interest Income Recognized, with Related Allowance		810	[2]	902		2,524	[3]	2,710
Average Recorded Investment		70,348	[2]	84,372		73,500	[3]	86,508
Interest Income Recognized		827	[2]	908		2,561	[3]	2,753
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]	6,975				6,975				7,737
Unpaid Principal Balance, with an allowance recorded	[1]	7,121				7,121				7,880
Recorded Investment	[1]	6,975				6,975				8,254
Unpaid Principal Balance	[1]	7,121				7,121				8,648
Related Allowance	[1]	482				482				554
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	551		222	[3]	632
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	2
Average Recorded Investment, with Related Allowance		7,311	[2]	8,000		7,525	[3]	8,153
Interest Income Recognized, with Related Allowance		91	[2]	111		300	[3]	318
Average Recorded Investment		7,311	[2]	8,551		7,747	[3]	8,785
Interest Income Recognized		91	[2]	111		300	[3]	320
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]	169				169				239
Unpaid Principal Balance, with an allowance recorded	[1]	197				197				244
Recorded Investment	[1]	169				169				270
Unpaid Principal Balance	[1]	197				197				953
Related Allowance	[1]	10				10				36
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		0	[2]	133		8	[3]	405
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	7
Average Recorded Investment, with Related Allowance		171	[2]	1,117		187	[3]	1,352
Interest Income Recognized, with Related Allowance		2	[2]	3		6	[3]	29
Average Recorded Investment		171	[2]	1,250		195	[3]	1,757
Interest Income Recognized		2	[2]	3		6	[3]	36
Commercial [Member] | Commercial and Industrial [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	535				535				2,341
Unpaid Principal Balance, with no related allowance	[1]	557				557				3,261
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	2,578				2,578				4,902
Unpaid Principal Balance, with an allowance recorded	[1]	2,612				2,612				5,246
Recorded Investment	[1]	3,113				3,113				7,243
Unpaid Principal Balance	[1]	3,169				3,169				8,507
Related Allowance	[1]	475				475				1,654
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		445	[2]	0		808	[3]	616
Interest Income Recognized, with No Related Allowance		8	[2]	0		16	[3]	21
Average Recorded Investment, with Related Allowance		2,878	[2]	7,145		3,488	[3]	5,929
Interest Income Recognized, with Related Allowance		26	[2]	69		98	[3]	151
Average Recorded Investment		3,323	[2]	7,145		4,296	[3]	6,545
Interest Income Recognized		34	[2]	69		114	[3]	172
Mortgage [Member] | 1-4 Family [Member]
Impaired Loans by class [Abstract]
Recorded Investment, with no related allowance	[1]	2				2				2
Unpaid Principal Balance, with no related allowance	[1]	472				472				387
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	37,872				37,872				41,701
Unpaid Principal Balance, with an allowance recorded	[1]	39,393				39,393				43,479
Recorded Investment	[1]	37,874				37,874				41,703
Unpaid Principal Balance	[1]	39,865				39,865				43,866
Related Allowance	[1]	3,517				3,517				4,100
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		127	[2]	12		64	[3]	12
Interest Income Recognized, with No Related Allowance		7	[2]	3		16	[3]	9
Average Recorded Investment, with Related Allowance		38,533	[2]	44,256		39,716	[3]	45,728
Interest Income Recognized, with Related Allowance		462	[2]	470		1,420	[3]	1,447
Average Recorded Investment		38,660	[2]	44,268		39,780	[3]	45,740
Interest Income Recognized		469	[2]	473		1,436	[3]	1,456
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]	16,098				16,098				16,898
Unpaid Principal Balance, with an allowance recorded	[1]	16,169				16,169				16,931
Recorded Investment	[1]	16,098				16,098				16,898
Unpaid Principal Balance	[1]	16,169				16,169				16,931
Related Allowance	[1]	2,264				2,264				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		16,175	[2]	17,372		16,485	[3]	17,705
Interest Income Recognized, with Related Allowance		153	[2]	161		464	[3]	480
Average Recorded Investment		16,175	[2]	17,372		16,485	[3]	17,705
Interest Income Recognized		153	[2]	161		464	[3]	480
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]	171				171				235
Unpaid Principal Balance, with an allowance recorded	[1]	238				238				242
Recorded Investment	[1]	171				171				235
Unpaid Principal Balance	[1]	238				238				242
Related Allowance	[1]	30				30				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		201	[2]	241		218	[3]	223
Interest Income Recognized, with Related Allowance		1	[2]	2		5	[3]	6
Average Recorded Investment		201	[2]	241		218	[3]	223
Interest Income Recognized		1	[2]	2		5	[3]	6
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]	179				179				315
Unpaid Principal Balance, with an allowance recorded	[1]	213				213				398
Recorded Investment	[1]	179				179				315
Unpaid Principal Balance	[1]	213				213				398
Related Allowance	[1]	12				12				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		180	[2]	280		217	[3]	231
Interest Income Recognized, with Related Allowance		2	[2]	6		5	[3]	11
Average Recorded Investment		180	[2]	280		217	[3]	231
Interest Income Recognized		2	[2]	6		5	[3]	11
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]	71				71				66
No Related Allowance	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	1,791				1,791				1,994
Unpaid Principal Balance, with an allowance recorded	[1]	1,921				1,921				2,117
Recorded Investment	[1]	1,792				1,792				1,994
Unpaid Principal Balance	[1]	1,992				1,992				2,183
Related Allowance	[1]	85				85				118
Average recorded investment in and interest income earned on impaired loans by class [Abstract]
Average Recorded Investment, with No Related Allowance		1	[2]	0		1	[3]	0
Interest Income Recognized, with No Related Allowance		1	[2]	3		4	[3]	4
Average Recorded Investment, with Related Allowance		1,808	[2]	2,140		1,874	[3]	2,233
Interest Income Recognized, with Related Allowance		40	[2]	34		107	[3]	118
Average Recorded Investment		1,809	[2]	2,140		1,875	[3]	2,233
Interest Income Recognized		41	[2]	37		111	[3]	122
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]	1,969				1,969				2,415
Unpaid Principal Balance, with an allowance recorded	[1]	1,994				1,994				2,443
Recorded Investment	[1]	1,969				1,969				2,415
Unpaid Principal Balance	[1]	1,994				1,994				2,443
Related Allowance	[1]	161				161				182
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]	4
Interest Income Recognized, with No Related Allowance		0	[2]	0		0	[3]	0
Average Recorded Investment, with Related Allowance		2,058	[2]	2,585		2,210	[3]	2,723
Interest Income Recognized, with Related Allowance		26	[2]	37		96	[3]	122
Average Recorded Investment		2,058	[2]	2,585		2,210	[3]	2,727
Interest Income Recognized		26	[2]	37		96	[3]	122
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	[1]	0				0				0
Recorded Investment, with an allowance recorded	[1]	93				93				109
Unpaid Principal Balance, with an allowance recorded	[1]	93				93				108
Recorded Investment	[1]	93				93				109
Unpaid Principal Balance	[1]	93				93				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		98	[2]	114		103	[3]	117
Interest Income Recognized, with Related Allowance		1	[2]	2		4	[3]	5
Average Recorded Investment		98	[2]	114		103	[3]	117
Interest Income Recognized		1	[2]	2		4	[3]	5
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]	360				360				394
Unpaid Principal Balance, with an allowance recorded	[1]	377				377				426
Recorded Investment	[1]	360				360				394
Unpaid Principal Balance	[1]	377				377				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		1	[2]	0		1	[3]	0
Average Recorded Investment, with Related Allowance		361	[2]	424		373	[3]	443
Interest Income Recognized, with Related Allowance		6	[2]	7		19	[3]	23
Average Recorded Investment		361	[2]	424		373	[3]	443
Interest Income Recognized		$ 7	[2]	$ 7		$ 20	[3]	$ 23

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

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

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