Loans and Allowance for Credit Losses - Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 6,058		$ 6,058		$ 7,494
Upaid Principal Balance, With no related allowance recorded	7,798		7,798		10,402
Recorded Investment, With an allowance recorded	4,089		4,089		5,863
Unpaid Principal Balance, With an allowance recorded	4,094		4,094		5,955
Related Allowance	366		366		1,007
Total Recorded Investment	10,147		10,147		13,357
Total Unpaid Principal Balance	11,892		11,892		16,357
Average Recorded Investment, With no related allowance recorded	6,470	7,511	6,998	7,447
Interest Income Recognized, With no related allowance recorded	20	0	41	0
Average Recorded Investment, With an allowance recorded	4,054	8,749	4,735	8,963
Interest Income Recognized, With an allowance recorded	68	147	138	265
Average Recorded Investment, Total	10,524	16,260	11,733	16,410
Interest Income Recognized, Total	88	147	179	265
Forgone interest on nonaccrual loans	95	216	185	378
Commercial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, With no related allowance recorded			255	0
Interest Income Recognized, With no related allowance recorded			0	0
Average Recorded Investment, With an allowance recorded			498	1,803
Interest Income Recognized, With an allowance recorded			0	65
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	38		38		350
Upaid Principal Balance, With no related allowance recorded	871		871		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	155	0	255	0
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Average Recorded Investment, With an allowance recorded	0	1,589	498	1,803
Interest Income Recognized, With an allowance recorded	0	32	0	65
Real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	4,254		4,254		5,111
Upaid Principal Balance, With no related allowance recorded	4,488		4,488		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	4,409	5,792	4,814	5,755
Interest Income Recognized, With no related allowance recorded	20	0	41	0
Average Recorded Investment, With an allowance recorded	3,832	7,017	3,978	7,014
Interest Income Recognized, With an allowance recorded	68	115	138	200
Owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	2,427		2,427		3,160
Upaid Principal Balance, With no related allowance recorded	2,691		2,691		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	2,532	204	2,911	137
Interest Income Recognized, With no related allowance recorded	20	0	41	0
Average Recorded Investment, With an allowance recorded	0	1,322	55	1,402
Interest Income Recognized, With an allowance recorded	0	30	0	30
Real estate construction and other land loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,358		1,358		1,449
Upaid Principal Balance, With no related allowance recorded	1,307		1,307		2,136
Recorded Investment, With an allowance recorded	3,818		3,818		4,044
Unpaid Principal Balance, With an allowance recorded	3,817		3,817		4,044
Related Allowance	324		324		462
Average Recorded Investment, With no related allowance recorded	1,245	5,432	1,349	5,488
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Average Recorded Investment, With an allowance recorded	3,832	5,695	3,923	5,612
Interest Income Recognized, With an allowance recorded	68	85	138	170
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	469		469		502
Upaid Principal Balance, With no related allowance recorded	490		490		891
Average Recorded Investment, With no related allowance recorded	632	156	554	130
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,766		1,766		2,033
Upaid Principal Balance, With no related allowance recorded	2,439		2,439		2,831
Average Recorded Investment, With no related allowance recorded	1,906	1,719	1,929	1,692
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Average Recorded Investment, With an allowance recorded			259	146
Interest Income Recognized, With an allowance recorded			0	0
Equity loans and lines of credit
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,741		1,741		2,029
Upaid Principal Balance, With no related allowance recorded	2,411		2,411		2,826
Recorded Investment, With an allowance recorded	271		271		257
Unpaid Principal Balance, With an allowance recorded	277		277		264
Related Allowance	42		42		73
Average Recorded Investment, With no related allowance recorded	1,883	1,719	1,917	1,692
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Average Recorded Investment, With an allowance recorded	222	143	224	146
Interest Income Recognized, With an allowance recorded	0	0	0	0
Consumer and installment
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	25		25		4
Upaid Principal Balance, With no related allowance recorded	28		28		5
Average Recorded Investment, With no related allowance recorded	23	0	12	0
Interest Income Recognized, With no related allowance recorded	0	0	0	0
Average Recorded Investment, With an allowance recorded			35	0
Interest Income Recognized, With an allowance recorded			$ 0	$ 0

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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

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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.

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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

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Amount of allowance for credit losses related to recorded investment.

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

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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.

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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

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