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Non-performing Loans and Impaired Loans - Loans Transferred and Classified as Troubled Debt Restructured Loans Non-accrual (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Defaults	Sep. 30, 2013 Defaults	Sep. 30, 2014 Defaults	Sep. 30, 2013 Defaults
Financing Receivable, Modifications [Line Items]
Number of Defaults	2	1	7	4
Unpaid Principal Balance	$ 261	$ 997	$ 966	$ 1,236
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults			2
Unpaid Principal Balance			362
Commercial [Member] | Owner Occupied Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance	0
Commercial [Member] | Non Owner Occupied Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Commercial [Member] | Residential Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Commercial [Member] | Development & Spec Land Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults			2
Unpaid Principal Balance			362
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1		2	3
Unpaid Principal Balance	98		246	239
Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1		2	3
Unpaid Principal Balance	98		246	239
Real Estate [Member] | Residential Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Real Estate [Member] | Mortgage Warehousing [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	1	3	1
Unpaid Principal Balance	163	997	358	997
Consumer [Member] | Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Direct Installment Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	1	3	1
Unpaid Principal Balance	$ 163	$ 997	$ 358	$ 997

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- Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524

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X

- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524

+ Details

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Balance Type:	debit
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