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Other Real Estate Owned - Summary of Foreclosed Property Activity (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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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

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- 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
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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 + Details
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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 + Details
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- Definition Value transferred from mortgage loans to real estate owned (REO) in noncash transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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