Loans and Allowance for Credit Losses - Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 6,521		$ 7,494
Upaid Principal Balance, With no related allowance recorded	9,826		10,402
Recorded Investment, With an allowance recorded	4,037		5,863
Unpaid Principal Balance, With an allowance recorded	4,041		5,955
Related Allowance	338		1,007
Total Recorded Investment	10,558		13,357
Total Unpaid Principal Balance	13,867		16,357
Average Recorded Investment, With no related allowance recorded	7,394	8,117
Interest Income Recognized, With no related allowance recorded	20	0
Average Recorded Investment, With an allowance recorded	5,192	9,288
Interest Income Recognized, With an allowance recorded	70	119
Average Recorded Investment, Total	12,586	17,405
Interest Income Recognized, Total	90	119
Forgone interest on nonaccrual loans	164	176
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	290		350
Upaid Principal Balance, With no related allowance recorded	1,332		385
Recorded Investment, With an allowance recorded			1,177
Unpaid Principal Balance, With an allowance recorded			1,222
Related Allowance			469
Average Recorded Investment, With no related allowance recorded	329	558
Interest Income Recognized, With no related allowance recorded	0	0
Average Recorded Investment, With an allowance recorded	872	1,821
Interest Income Recognized, With an allowance recorded	0	33
Real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	4,453		5,111
Upaid Principal Balance, With no related allowance recorded	6,072		7,186
Recorded Investment, With an allowance recorded			4,429
Unpaid Principal Balance, With an allowance recorded			4,469
Related Allowance			465
Average Recorded Investment, With no related allowance recorded	5,118	5,868
Interest Income Recognized, With no related allowance recorded	20	0
Average Recorded Investment, With an allowance recorded	4,084	7,227
Interest Income Recognized, With an allowance recorded	70	86
Owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	2,561		3,160
Upaid Principal Balance, With no related allowance recorded	3,054		4,159
Recorded Investment, With an allowance recorded			385
Unpaid Principal Balance, With an allowance recorded			425
Related Allowance			3
Average Recorded Investment, With no related allowance recorded	3,195	835
Interest Income Recognized, With no related allowance recorded	20	0
Average Recorded Investment, With an allowance recorded	96	747
Interest Income Recognized, With an allowance recorded	0	0
Real estate construction and other land loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,401		1,449
Upaid Principal Balance, With no related allowance recorded	2,128		2,136
Recorded Investment, With an allowance recorded	3,861		4,044
Unpaid Principal Balance, With an allowance recorded	3,861		4,044
Related Allowance	308		462
Average Recorded Investment, With no related allowance recorded	1,427	5,007
Interest Income Recognized, With no related allowance recorded	0	0
Average Recorded Investment, With an allowance recorded	3,988	6,480
Interest Income Recognized, With an allowance recorded	70	86
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	491		502
Upaid Principal Balance, With no related allowance recorded	890		891
Average Recorded Investment, With no related allowance recorded	496	26
Interest Income Recognized, With no related allowance recorded	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,778		2,033
Upaid Principal Balance, With no related allowance recorded	2,422		2,831
Average Recorded Investment, With no related allowance recorded	1,947	1,691
Interest Income Recognized, With no related allowance recorded	0	0
Equity loans and lines of credit
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,774		2,029
Upaid Principal Balance, With no related allowance recorded	2,417		2,826
Recorded Investment, With an allowance recorded	176		257
Unpaid Principal Balance, With an allowance recorded	180		264
Related Allowance	30		73
Average Recorded Investment, With no related allowance recorded	1,943	1,691
Interest Income Recognized, With no related allowance recorded	0	0
Average Recorded Investment, With an allowance recorded	236	223
Interest Income Recognized, With an allowance recorded	0	0
Consumer and installment
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	4		4
Upaid Principal Balance, With no related allowance recorded	5		5
Average Recorded Investment, With no related allowance recorded	4	0
Interest Income Recognized, With no related allowance recorded	$ 0	$ 0

Name:	us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554

+ Details

Name:	us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration