Loans, Troubled Debt Restructurings (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	$ 152,477,000			$ 152,477,000			$ 145,217,000
Troubled debt restructuring, specific reserve	20,600,000			20,600,000			18,100,000
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	41		25	196		172
Pre-modification recorded balance	5,380,000		11,762,000	37,814,000		37,588,000
Post-modification recorded balance	5,019,000		11,471,000	36,700,000		33,255,000
Increase in allowance for loan losses	400,000		100,000	1,500,000		700,000
Charge offs due to troubled debt restructurings	0		300,000	400,000		3,800,000
TDR that subsequently defaulted [Abstract]
Number of contracts	4		7	17		22
Financing receivable modification subsequent default recorded investment	1,295,000		1,129,000	2,261,000		4,699,000
Past due period for modified loans				90 days
Increase (decrease) in allowance for loan loss due to TDRs that subsequently defaulted	700,000		200,000	700,000		(400,000)
Charge-offs on TDRs that subsequently defaulted	100,000		100,000	400,000		1,500,000
Maximum [Member]
TDR that subsequently defaulted [Abstract]
Modification of stated interest rate of loans, range of period (in months)				60
Modifications involving extension of maturity date, period range (in months)				60
Minimum [Member]
TDR that subsequently defaulted [Abstract]
Modification of stated interest rate of loans, range of period (in months)				9
Modifications involving extension of maturity date, period range (in months)				1
Maximum in Certain Circumstances [Member]
TDR that subsequently defaulted [Abstract]
Modification of stated interest rate of loans, range of period (in months)				480
Modifications involving extension of maturity date, period range (in months)				472
Commercial [Member] | Income Producing - Real Estate [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	4		5	18		16
Pre-modification recorded balance	626,000		6,579,000	8,894,000		14,793,000
Post-modification recorded balance	545,000		6,370,000	8,736,000		13,928,000
TDR that subsequently defaulted [Abstract]
Number of contracts	2		1	2		3
Financing receivable modification subsequent default recorded investment	827,000		136,000	827,000		1,042,000
Commercial [Member] | Land, Land Development and Construction Real Estate [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	2		1	5		3
Pre-modification recorded balance	460,000		1,900,000	3,347,000		5,111,000
Post-modification recorded balance	523,000		1,804,000	3,436,000		1,893,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	1		1
Financing receivable modification subsequent default recorded investment	0		0	136,000		1,222,000
Commercial [Member] | Commercial and Industrial [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	10		0	43		10
Pre-modification recorded balance	631,000		0	8,827,000		1,129,000
Post-modification recorded balance	558,000		0	8,453,000		1,111,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	7		0
Financing receivable modification subsequent default recorded investment	0		0	520,000		0
Mortgage [Member] | Family 1 4 [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	10		6	58		59
Pre-modification recorded balance	1,870,000		1,603,000	7,738,000		7,663,000
Post-modification recorded balance	1,656,000		1,629,000	7,330,000		7,540,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		4	2		8
Financing receivable modification subsequent default recorded investment	0		607,000	148,000		1,024,000
Mortgage [Member] | Resort Lending [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	7		4	29		27
Pre-modification recorded balance	1,575,000		1,515,000	7,529,000		7,474,000
Post-modification recorded balance	1,562,000		1,501,000	7,356,000		7,393,000
TDR that subsequently defaulted [Abstract]
Number of contracts	2		1	3		5
Financing receivable modification subsequent default recorded investment	468,000		340,000	584,000		1,128,000
Mortgage [Member] | Home Equity Line of Credit - 1st Lien [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	0		0	1		1
Pre-modification recorded balance	0		0	15,000		45,000
Post-modification recorded balance	0		0	0		47,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	0		0
Financing receivable modification subsequent default recorded investment	0		0	0		0
Mortgage [Member] | Home Equity Line of Credit - 2nd Lien [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	0		0	0		1
Pre-modification recorded balance	0		0	0		23,000
Post-modification recorded balance	0		0	0		19,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	0		0
Financing receivable modification subsequent default recorded investment	0		0	0		0
Installment [Member] | Home Equity Installment - 1st Lien [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	4		4	14		18
Pre-modification recorded balance	137,000		98,000	561,000		475,000
Post-modification recorded balance	98,000		99,000	521,000		470,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	1		1
Financing receivable modification subsequent default recorded investment	0		0	26,000		19,000
Installment [Member] | Home Equity Installment - 2nd Lien [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	2		0	16		14
Pre-modification recorded balance	59,000		0	604,000		464,000
Post-modification recorded balance	56,000		0	590,000		450,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		1	1		4
Financing receivable modification subsequent default recorded investment	0		46,000	20,000		264,000
Installment [Member] | Loans Not Secured By Real Estate [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	2		5	12		23
Pre-modification recorded balance	22,000		67,000	299,000		411,000
Post-modification recorded balance	21,000		68,000	278,000		404,000
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	0		0
Financing receivable modification subsequent default recorded investment	0		0	0		0
Installment [Member] | Others 2 [Member]
Loans classified as troubled debt restructurings [Abstract]
Number of contracts	0		0	0		0
Pre-modification recorded balance	0		0	0		0
Post-modification recorded balance	0		0	0		0
TDR that subsequently defaulted [Abstract]
Number of contracts	0		0	0		0
Financing receivable modification subsequent default recorded investment	0		0	0		0
Performing TDR's [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	132,502,000			132,502,000			116,569,000
Non-performing TDR's [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	19,975,000	[1]		19,975,000	[1]		28,648,000	[1]
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	54,799,000			54,799,000			44,366,000
Commercial [Member] | Performing TDR's [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	44,061,000			44,061,000			29,799,000
Commercial [Member] | Non-performing TDR's [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	10,738,000	[1]		10,738,000	[1]		14,567,000	[1]
Retail Segment [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	97,678,000			97,678,000			100,851,000
Retail Segment [Member] | Performing TDR's [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	88,441,000			88,441,000			86,770,000
Retail Segment [Member] | Non-performing TDR's [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	$ 9,237,000	[1],[2]		$ 9,237,000	[1],[2]		$ 14,081,000	[1],[2]

[1] Included in non-performing loans table above.

[2] Also includes loans on non-accrual at the time of modification until six payments are received on a timely basis.