Loans, Loan Ratings by Loan Class, Commercial Segment (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	$ 710,323,000		$ 690,955,000
Credit ratings of insurer or risk retention group counterparties [Abstract]
Subsidiary's outstanding payment plan 2, insured by third party (in hundredths)	23.30%
Subsidiary's outstanding payment plan insured by third party (in hundredths)	63.60%
Payment Plan Receivables, Full Refund	24,657,000		27,853,000
Payment Plan Receivables, Partial Refund	9,017,000		7,094,000
Payment Plan Receivables, Other	5,093,000		5,054,000
Total	38,767,000		40,001,000
Other Real Estate and Foreclosed Assets [Abstract]
Foreclosed residential real estate properties	2,900,000		2,900,000
Retail mortgage loans in process of foreclosure	2,000,000		2,500,000
Non-Watch 1-6 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	662,994,000		645,082,000
Watch 7-8 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	37,166,000		34,609,000
Substandard Accrual 9 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	7,281,000		8,306,000
Non Accrual 10-11 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	4,511,000		4,573,000
AM Best Rating A+ [Member]
Credit ratings of insurer or risk retention group counterparties [Abstract]
Payment Plan Receivables, Full Refund	0		0
Payment Plan Receivables, Partial Refund	28,000		43,000
Payment Plan Receivables, Other	0		0
Total	28,000		43,000
AM Best A Rating [Member]
Credit ratings of insurer or risk retention group counterparties [Abstract]
Payment Plan Receivables, Full Refund	6,710,000		10,007,000
Payment Plan Receivables, Partial Refund	8,163,000		6,190,000
Payment Plan Receivables, Other	0		0
Total	14,873,000		16,197,000
AM Best Rating, A Minus Rating [Member]
Credit ratings of insurer or risk retention group counterparties [Abstract]
Payment Plan Receivables, Full Refund	2,354,000		1,989,000
Payment Plan Receivables, Partial Refund	687,000		685,000
Payment Plan Receivables, Other	5,093,000		5,054,000
Total	8,134,000		7,728,000
Not Rated [Member]
Credit ratings of insurer or risk retention group counterparties [Abstract]
Payment Plan Receivables, Full Refund	15,593,000		15,857,000
Payment Plan Receivables, Partial Refund	139,000		176,000
Payment Plan Receivables, Other	0		0
Total	15,732,000		16,033,000
Commercial [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	711,952,000		692,570,000
Income Producing - Real Estate [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	271,877,000		253,066,000
Income Producing - Real Estate [Member] | Non-Watch 1-6 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	260,434,000		241,266,000
Income Producing - Real Estate [Member] | Watch 7-8 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	8,304,000		8,649,000
Income Producing - Real Estate [Member] | Substandard Accrual 9 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	1,952,000		1,918,000
Income Producing - Real Estate [Member] | Non Accrual 10-11 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	1,187,000		1,233,000
Land, Land Development and Construction - Real Estate [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	32,491,000		34,338,000
Land, Land Development and Construction - Real Estate [Member] | Non-Watch 1-6 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	29,394,000		30,869,000
Land, Land Development and Construction - Real Estate [Member] | Watch 7-8 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	2,268,000		2,485,000
Land, Land Development and Construction - Real Estate [Member] | Substandard Accrual 9 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	255,000		390,000
Land, Land Development and Construction - Real Estate [Member] | Non Accrual 10-11 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	574,000		594,000
Commercial and Industrial [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	407,584,000		405,166,000
Commercial and Industrial [Member] | Non-Watch 1-6 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	373,166,000		372,947,000
Commercial and Industrial [Member] | Watch 7-8 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	26,594,000		23,475,000
Commercial and Industrial [Member] | Substandard Accrual 9 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	5,074,000		5,998,000
Commercial and Industrial [Member] | Non Accrual 10-11 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	2,750,000		2,746,000
Mortgage [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	50,998,000	[1]	52,490,000	[1]
750-799	136,857,000	[1]	139,075,000	[1]
700-749	96,943,000	[1]	98,199,000	[1]
650-699	82,943,000	[1]	83,365,000	[1]
600-649	39,299,000	[1]	39,874,000	[1]
550-599	26,969,000	[1]	27,715,000	[1]
500-549	18,373,000	[1]	18,831,000	[1]
Under 500	7,976,000	[1]	8,074,000	[1]
Unknown	7,671,000	[1]	7,175,000	[1]
Total	468,029,000	[1]	474,798,000	[1]
Accrued interest included in total	2,122,000	[1]	2,170,000	[1]
1-4 Family [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	26,878,000	[1]	27,918,000	[1]
750-799	71,729,000	[1]	72,674,000	[1]
700-749	52,139,000	[1]	52,843,000	[1]
650-699	51,460,000	[1]	51,664,000	[1]
600-649	27,520,000	[1]	27,770,000	[1]
550-599	20,748,000	[1]	21,361,000	[1]
500-549	14,367,000	[1]	14,575,000	[1]
Under 500	6,207,000	[1]	6,306,000	[1]
Unknown	5,072,000	[1]	4,075,000	[1]
Total	276,120,000	[1]	279,186,000	[1]
Accrued interest included in total	1,293,000	[1]	1,311,000	[1]
Resort Lending [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	14,188,000	[1]	14,484,000	[1]
750-799	44,161,000	[1]	45,950,000	[1]
700-749	31,539,000	[1]	32,660,000	[1]
650-699	19,931,000	[1]	20,250,000	[1]
600-649	6,295,000	[1]	6,538,000	[1]
550-599	3,529,000	[1]	3,639,000	[1]
500-549	2,117,000	[1]	2,156,000	[1]
Under 500	873,000	[1]	875,000	[1]
Unknown	2,164,000	[1]	2,184,000	[1]
Total	124,797,000	[1]	128,736,000	[1]
Accrued interest included in total	540,000	[1]	562,000	[1]
Home Equity - 1st Lien [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	3,995,000	[1]	3,863,000	[1]
750-799	6,102,000	[1]	6,128,000	[1]
700-749	3,307,000	[1]	3,054,000	[1]
650-699	3,408,000	[1]	3,257,000	[1]
600-649	1,716,000	[1]	1,704,000	[1]
550-599	1,016,000	[1]	994,000	[1]
500-549	603,000	[1]	699,000	[1]
Under 500	269,000	[1]	261,000	[1]
Unknown	243,000	[1]	242,000	[1]
Total	20,659,000	[1]	20,202,000	[1]
Accrued interest included in total	91,000	[1]	88,000	[1]
Home Equity - 2nd Lien [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	5,937,000	[1]	6,225,000	[1]
750-799	14,865,000	[1]	14,323,000	[1]
700-749	9,958,000	[1]	9,642,000	[1]
650-699	8,144,000	[1]	8,194,000	[1]
600-649	3,768,000	[1]	3,862,000	[1]
550-599	1,676,000	[1]	1,721,000	[1]
500-549	1,286,000	[1]	1,401,000	[1]
Under 500	627,000	[1]	632,000	[1]
Unknown	192,000	[1]	674,000	[1]
Total	46,453,000	[1]	46,674,000	[1]
Accrued interest included in total	198,000	[1]	209,000	[1]
Installment [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	37,223,000	[1]	36,674,000	[1]
750-799	83,894,000	[1]	81,375,000	[1]
700-749	39,079,000	[1]	38,337,000	[1]
650-699	25,164,000	[1]	26,207,000	[1]
600-649	10,548,000	[1]	11,225,000	[1]
550-599	5,637,000	[1]	5,962,000	[1]
500-549	3,601,000	[1]	3,920,000	[1]
Under 500	1,228,000	[1]	1,303,000	[1]
Unknown	2,245,000	[1]	2,044,000	[1]
Total	208,619,000	[1]	207,047,000	[1]
Accrued interest included in total	657,000	[1]	669,000	[1]
Home Equity - 1st Lien [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	2,108,000	[1]	2,272,000	[1]
750-799	5,471,000	[1]	5,677,000	[1]
700-749	2,960,000	[1]	3,111,000	[1]
650-699	3,801,000	[1]	3,963,000	[1]
600-649	3,276,000	[1]	3,434,000	[1]
550-599	1,942,000	[1]	2,019,000	[1]
500-549	1,040,000	[1]	1,128,000	[1]
Under 500	385,000	[1]	393,000	[1]
Unknown	67,000	[1]	77,000	[1]
Total	21,050,000	[1]	22,074,000	[1]
Accrued interest included in total	84,000	[1]	93,000	[1]
Home Equity - 2nd Lien [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	2,653,000	[1]	2,835,000	[1]
750-799	7,843,000	[1]	8,557,000	[1]
700-749	5,712,000	[1]	6,358,000	[1]
650-699	5,135,000	[1]	5,477,000	[1]
600-649	2,281,000	[1]	2,408,000	[1]
550-599	1,864,000	[1]	1,913,000	[1]
500-549	981,000	[1]	1,036,000	[1]
Under 500	408,000	[1]	427,000	[1]
Unknown	37,000	[1]	81,000	[1]
Total	26,914,000	[1]	29,092,000	[1]
Accrued interest included in total	100,000	[1]	112,000	[1]
Loans Not Secured By Real Estate [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	32,402,000	[1]	31,507,000	[1]
750-799	70,089,000	[1]	66,558,000	[1]
700-749	29,787,000	[1]	28,179,000	[1]
650-699	15,699,000	[1]	16,152,000	[1]
600-649	4,755,000	[1]	5,128,000	[1]
550-599	1,703,000	[1]	1,896,000	[1]
500-549	1,503,000	[1]	1,672,000	[1]
Under 500	408,000	[1]	455,000	[1]
Unknown	2,108,000	[1]	1,842,000	[1]
Total	158,454,000	[1]	153,389,000	[1]
Accrued interest included in total	456,000	[1]	445,000	[1]
Other [Member]
Loan ratings/credit scores by loan class [Abstract]
800 and above	60,000	[1]	60,000	[1]
750-799	491,000	[1]	583,000	[1]
700-749	620,000	[1]	689,000	[1]
650-699	529,000	[1]	615,000	[1]
600-649	236,000	[1]	255,000	[1]
550-599	128,000	[1]	134,000	[1]
500-549	77,000	[1]	84,000	[1]
Under 500	27,000	[1]	28,000	[1]
Unknown	33,000	[1]	44,000	[1]
Total	2,201,000	[1]	2,492,000	[1]
Accrued interest included in total	17,000	[1]	19,000	[1]
Accrued interest included in total [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	1,629,000		1,615,000
Accrued interest included in total [Member] | Non-Watch 1-6 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	1,491,000		1,479,000
Accrued interest included in total [Member] | Watch 7-8 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	113,000		111,000
Accrued interest included in total [Member] | Substandard Accrual 9 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	25,000		25,000
Accrued interest included in total [Member] | Non Accrual 10-11 [Member]
Loan ratings/credit scores by loan class [Abstract]
Commercial loan	$ 0		$ 0

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