Loans Receivable and Allowance for Loan Losses - Number of Loans Modified and Their Pre-Modification and Post-Modification Investment Balances (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014 Contract	Jun. 30, 2013 Contract	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	14	1	14	1
Pre-Modification Recorded Investment	$ 1,523	$ 524	$ 1,523	$ 524
Post-Modification Recorded Investment	1,456	524	1,456	524
Acquisition and Development [Member] \| Commercial and Land Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	1	0	1
Pre-Modification Recorded Investment	0	524	0	524
Post-Modification Recorded Investment	0	524	0	524
Residential Mortgage [Member] \| First Lien [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	14	0	14	0
Pre-Modification Recorded Investment	1,523	0	1,523	0
Post-Modification Recorded Investment	$ 1,456	$ 0	$ 1,456	$ 0

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524

+ Details

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

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- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

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