Interest income from external customers.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses.

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The net amount of operating interest income (expense).

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

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Total aggregate amount of all noninterest expense.

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of expense related to estimated loss from loan and lease transactions.

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Segment Reporting - Summary of Results for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended				36 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total interest income	$ 7,686	$ 7,899	$ 7,930	$ 7,846	$ 8,340	$ 8,270	$ 8,432	$ 8,594	$ 31,361	$ 33,636
Total interest expense	636us-gaap_InterestExpense	642us-gaap_InterestExpense	630us-gaap_InterestExpense	645us-gaap_InterestExpense	677us-gaap_InterestExpense	702us-gaap_InterestExpense	737us-gaap_InterestExpense	789us-gaap_InterestExpense	2,553us-gaap_InterestExpense	2,905us-gaap_InterestExpense
Net interest income	7,050us-gaap_InterestIncomeExpenseNet	7,257us-gaap_InterestIncomeExpenseNet	7,300us-gaap_InterestIncomeExpenseNet	7,201us-gaap_InterestIncomeExpenseNet	7,663us-gaap_InterestIncomeExpenseNet	7,568us-gaap_InterestIncomeExpenseNet	7,695us-gaap_InterestIncomeExpenseNet	7,805us-gaap_InterestIncomeExpenseNet	28,808us-gaap_InterestIncomeExpenseNet	30,731us-gaap_InterestIncomeExpenseNet
Provision (reduction in reserve) for loan losses	(169)us-gaap_ProvisionForLoanAndLeaseLosses	(55)us-gaap_ProvisionForLoanAndLeaseLosses	(264)us-gaap_ProvisionForLoanAndLeaseLosses	414us-gaap_ProvisionForLoanAndLeaseLosses	(1,441)us-gaap_ProvisionForLoanAndLeaseLosses	240us-gaap_ProvisionForLoanAndLeaseLosses	53us-gaap_ProvisionForLoanAndLeaseLosses	506us-gaap_ProvisionForLoanAndLeaseLosses	(74)us-gaap_ProvisionForLoanAndLeaseLosses	(642)us-gaap_ProvisionForLoanAndLeaseLosses	4,300us-gaap_ProvisionForLoanAndLeaseLosses	18,800us-gaap_ProvisionForLoanAndLeaseLosses	22,500us-gaap_ProvisionForLoanAndLeaseLosses
Net interest income after provision (reduction in reserve)	7,219	7,312	7,564	6,787	9,104	7,328	7,642	7,299	28,882	31,373
Total non-interest income	1,279us-gaap_NoninterestIncome	1,180us-gaap_NoninterestIncome	1,485us-gaap_NoninterestIncome	1,147us-gaap_NoninterestIncome	723us-gaap_NoninterestIncome	1,291us-gaap_NoninterestIncome	1,228us-gaap_NoninterestIncome	1,623us-gaap_NoninterestIncome	5,091us-gaap_NoninterestIncome	4,865us-gaap_NoninterestIncome
Total non-interest expense	7,246us-gaap_NoninterestExpense	7,242us-gaap_NoninterestExpense	7,223us-gaap_NoninterestExpense	6,884us-gaap_NoninterestExpense	8,569us-gaap_NoninterestExpense	7,365us-gaap_NoninterestExpense	7,176us-gaap_NoninterestExpense	7,692us-gaap_NoninterestExpense	28,595us-gaap_NoninterestExpense	30,802us-gaap_NoninterestExpense
Income (loss) before income taxes									5,378	5,436			(2,600)
Provision for income taxes	532us-gaap_IncomeTaxExpenseBenefit	413us-gaap_IncomeTaxExpenseBenefit	608us-gaap_IncomeTaxExpenseBenefit	276us-gaap_IncomeTaxExpenseBenefit	303us-gaap_IncomeTaxExpenseBenefit	350us-gaap_IncomeTaxExpenseBenefit	512us-gaap_IncomeTaxExpenseBenefit	344us-gaap_IncomeTaxExpenseBenefit	1,829us-gaap_IncomeTaxExpenseBenefit	1,509us-gaap_IncomeTaxExpenseBenefit
Net income (loss)	720us-gaap_ProfitLoss	837us-gaap_ProfitLoss	1,218us-gaap_ProfitLoss	774us-gaap_ProfitLoss	955us-gaap_ProfitLoss	904us-gaap_ProfitLoss	1,182us-gaap_ProfitLoss	886us-gaap_ProfitLoss	3,549us-gaap_ProfitLoss	3,927us-gaap_ProfitLoss
Other significant items:
Total assets	572,609us-gaap_Assets				569,801us-gaap_Assets				572,609us-gaap_Assets	569,801us-gaap_Assets			569,801us-gaap_Assets
Total investment securities	234,086us-gaap_MarketableSecurities				170,804us-gaap_MarketableSecurities				234,086us-gaap_MarketableSecurities	170,804us-gaap_MarketableSecurities			170,804us-gaap_MarketableSecurities
Total loans, net	259,516				300,927				259,516	300,927			300,927
Investment in subsidiaries	5				5				5	5			5
Fixed asset addition									1,708	381
Depreciation and amortization expense									803us-gaap_DepreciationAndAmortization	717us-gaap_DepreciationAndAmortization
Total interest income from external customers									31,361	33,636
Eliminations [Member]
Segment Reporting Information [Line Items]
Total interest income									(3,237)	(3,233)
Total interest expense									(3,237)	(3,233)
Total non-interest income									(753)	(887)
Total non-interest expense									(753)	(887)
Other significant items:
Total assets	(150,469)				(137,166)				(150,469)	(137,166)			(137,166)
Total loans, net	(64,639)				(59,616)				(64,639)	(59,616)			(59,616)
Investment in subsidiaries	(76,129)				(71,875)				(76,129)	(71,875)			(71,875)
Total interest income from affiliates									(3,237)	(3,233)
FUSB [Member]
Other significant items:
Total loans, net	187,500				233,453				187,500	233,453			233,453
FUSB [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total interest income									18,595	19,833
Total interest expense									2,564	2,915
Net interest income									16,031	16,918
Provision (reduction in reserve) for loan losses									(1,920)	(2,862)
Net interest income after provision (reduction in reserve)									17,951	19,780
Total non-interest income									3,987	3,553
Total non-interest expense									18,508	20,464
Income (loss) before income taxes									3,430	2,869
Provision for income taxes									998	493
Net income (loss)									2,432	2,376
Other significant items:
Total assets	566,779				559,159				566,779	559,159			559,159
Total investment securities	234,006				170,724				234,006	170,724			170,724
Total loans, net	252,139				293,069				252,139	293,069			293,069
Investment in subsidiaries	5				784				5	784			784
Fixed asset addition									1,607	323
Depreciation and amortization expense									584	539
Total interest income from external customers									15,369	16,610
Total interest income from affiliates									3,226	3,223
ALC [Member]
Other significant items:
Total loans, net	72,016				67,474				72,016	67,474			67,474
ALC [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total interest income									15,992	17,026
Total interest expense									3,226	3,223
Net interest income									12,766	13,803
Provision (reduction in reserve) for loan losses									1,846	2,220
Net interest income after provision (reduction in reserve)									10,920	11,583
Total non-interest income									1,163	1,387
Total non-interest expense									9,953	10,303
Income (loss) before income taxes									2,130	2,667
Provision for income taxes									827	1,012
Net income (loss)									1,303	1,655
Other significant items:
Total assets	75,046				71,572				75,046	71,572			71,572
Total loans, net	72,016				67,474				72,016	67,474			67,474
Fixed asset addition									101	58
Depreciation and amortization expense									219	178
Total interest income from external customers									15,991	17,026
All Other [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total interest income									11	10
Net interest income									11	10
Net interest income after provision (reduction in reserve)									11	10
Total non-interest income									694	812
Total non-interest expense									887	922
Income (loss) before income taxes									(182)	(100)
Provision for income taxes									4	4
Net income (loss)									(186)	(104)
Other significant items:
Total assets	81,253				76,236				81,253	76,236			76,236
Total investment securities	80				80				80	80			80
Investment in subsidiaries	76,129				71,096				76,129	71,096			71,096
Total interest income from external customers									1
Total interest income from affiliates									$ 11	$ 10