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Other Real Estate Owned - Summary of Foreclosed Property Activity (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 9,310	$ 13,286
Transfers from loans	4,513	2,196
Sales proceeds	(3,327)	(2,781)
Gross gains	235	90
Gross losses	(227)	(842)
Net gains (losses)	8	(752)
Impairment	(193)	(577)
Ending Balance	10,311	11,372
FUSB [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	8,463	11,089
Transfers from loans	4,152	1,770
Sales proceeds	(3,113)	(1,876)
Gross gains	231	62
Gross losses	(128)	(155)
Net gains (losses)	103	(93)
Impairment	(146)	(368)
Ending Balance	9,459	10,522
ALC [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	847	2,197
Transfers from loans	361	426
Sales proceeds	(214)	(905)
Gross gains	4	28
Gross losses	(99)	(687)
Net gains (losses)	(95)	(659)
Impairment	(47)	(209)
Ending Balance	$ 852	$ 850

X

- Definition

Other real estate gross gains.

+ References

No definition available.

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- Definition

Other real estate gross losses.

+ References

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- Definition

Other real estate net income loss.

+ References

No definition available.

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X

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

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- Definition

The cash inflow associated with the sale of other real estate not otherwise defined in the taxonomy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 28

-Article 12



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-Number 210

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-Paragraph c

-Subparagraph Schedule III

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- Definition

Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586



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