FNB Bancorp Inactive 10-K28 Mar 142013 FY Annual reportFinancial data

Company Profile

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
Document And Entity Information (USD $)	Dec. 31, 2013	Mar. 10, 2014	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'FNB Bancorp/CA/	'	'
Entity Central Index Key	'0001163199	'	'
Trading Symbol	'fnbg	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Non-accelerated Filer	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Common Stock, Shares Outstanding	'	3,978,505	'
Entity Public Float	'	'	$59,600,975
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets	'	'
Cash and due from banks	$14,007	$27,861
Interest-bearing time deposits with financial institutions	5,543	13,216
Securities available-for-sale, at fair value	263,988	234,945
Other equity securities	5,300	5,464
Loans, net of deferred loan fees and allowance for loan losses of $9,879 and $9,124 on December 31, 2013 and December 31, 2012	552,343	541,563
Bank premises, equipment, and leasehold improvements, net	12,512	12,706
Bank owned life insurance	12,151	11,785
Accrued interest receivable	3,808	3,760
Other real estate owned, net	5,318	6,650
Goodwill	1,841	1,841
Prepaid expenses	701	1,372
Other assets	14,418	14,177
Total assets	891,930	875,340
Deposits	'	'
Demand, noninterest bearing	198,523	178,384
Demand, interest bearing	80,746	75,465
Savings and money market	370,194	343,437
Time	124,152	171,066
Total deposits	773,615	768,352
Federal Home Loan Bank advances	15,000	1,220
Accrued expenses and other liabilities	9,066	10,410
Total liabilities	797,681	779,982
Commitments and Contingencies (Note 12)	'	'
Stockholders' equity	'	'
Preferred stock - series C - no par value, authorized and outstanding 9,450 shares at December 31, 2013 and 12,600 shares at December 31, 2012 (liquidation preference of $1,000 per share)	9,450	12,600
Common stock, no par value, authorized 10,000,000 shares; issued and outstanding 3,978,505 shares at December 31, 2013 and 3,883,543 shares at December 31, 2012	59,317	52,610
Retained earnings	26,738	26,280
Accumulated other comprehensive (loss) earnings, net of tax	-1,256	3,868
Total stockholders' equity	94,249	95,358
Total liabilities and stockholders' equity	$891,930	$875,340

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]	'	'
Net of deferred loan fees and allowance for loan losses (in dollars)	$9,879	$9,124
Preferred Stock, Series C, no par value (in dollars per share)	'	'
Preferred Stock, Series C, shares authorized	9,450	12,600
Preferred Stock, Series C, shares outstanding	9,450	12,600
Preferred Stock, Series C, liquidation preference per share (in dollars per share)	$1,000	$1,000
Common Stock, no par value (in dollars per share)	'	'
Common stock, shares authorized	10,000,000	10,000,000
Common Stock, shares issued	3,978,505	3,883,543
Common Stock, shares outstanding	3,978,505	3,698,612

Consolidated_Statements_of_Ear

Consolidated Statements of Earnings (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest income:	'	'	'
Interest and fees on loans	$31,937	$28,942	$29,320
Interest and dividends on taxable securities	3,283	2,541	1,910
Interest on tax-exempt securities	2,013	2,040	1,667
Interest on deposits with other financial institutions	156	65	'
Total interest income	37,389	33,588	32,897
Interest expense:	'	'	'
Deposits	2,376	2,724	3,327
Federal Home Loan Bank advances	19	3	'
Total interest expense	2,395	2,727	3,327
Net interest income	34,994	30,861	29,570
Provision for loan losses	1,385	1,833	1,750
Net interest income after provision for loan losses	33,609	29,028	27,820
Noninterest income:	'	'	'
Service charges	2,630	2,903	3,107
Credit card fees	'	437	701
Net gain on sale of available-for-sale securities	324	958	479
Bank-owned life insurance policy earnings	366	769	325
Bargain purchase gain	'	3,666	'
Other income	863	426	467
Total noninterest income	4,183	9,159	5,079
Noninterest expense:	'	'	'
Salaries and employee benefits	17,156	15,432	13,726
Occupancy expense	3,166	2,608	2,331
Equipment expense	1,549	1,732	1,722
Professional fees	1,661	1,585	1,668
FDIC assessment	720	702	1,155
Acquisition expense	'	428	'
Telephone, postage, supplies	1,220	1,138	1,149
Operating losses	69	77	571
Advertising expense	458	343	570
Bankcard expense	-7	442	658
Data processing expense	616	571	560
Low income housing expense	438	294	278
Surety insurance	265	299	267
Director expense	252	252	216
Gain on sale of other real estate owned	-96	-6	-66
Loss on impairment of other real estate owned	69	53	543
Other real estate owned expense	249	315	439
Other expense	1,243	1,474	1,287
Total noninterest expense	29,028	27,739	27,074
Earnings before provision for income taxes	8,764	10,448	5,825
Provision for income taxes	1,325	1,645	1,568
Net earnings	7,439	8,803	4,257
Dividends and discount accretion on preferred stock	567	658	800
Net earnings available to common stockholders	$6,872	$8,145	$3,457
Earnings per share available to common stockholders:	'	'	'
Basic (in dollars per share)	$1.75	$2.10	$0.89
Diluted (in dollars per share)	$1.71	$2.07	$0.89
Weighted average shares outstanding:	'	'	'
Basic (in shares)	3,935	3,879	3,873
Diluted (in shares)	4,024	3,943	3,893

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Net earnings	$7,439	$8,803	$4,257
Other comprehensive income:	'	'	'
Unrealized holding (loss) gain on available-for-sale securities net of tax benefit (expense) of $3,560, $(413), and $(2111)	-4,933	1,159	3,320
Reclassification adjustment for gains recognized on available-for-sale securities sold, net of tax expense of $133, $393 and $196	-191	-565	-283
Total other comprehensive (loss) earnings	-5,124	594	3,037
Total comprehensive earnings	$2,315	$9,397	$7,294

CONSOLIDATED_STATEMENTS_OF_COM1

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Parentheticals) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Tax on unrealized holding gain on available-for-sale securities (in dollars)	$3,560	($413)	($2,111)
Tax on reclassification adjustment for gain on available-for-sale (in dollars)	$133	$393	$196

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Stockholders' Equity (USD $)	Common stock	Preferred Stock series A	Preferred Stock series B	Preferred Stock series C	Retained earnings	Accumulated other comprehensive earnings (loss)	Total
In Thousands, except Share data, unless otherwise specified	Common stock	Preferred Stock series A	Preferred Stock series B	Preferred Stock series C	Retained earnings	Accumulated other comprehensive earnings (loss)	Total
Balance at Dec. 31, 2010	$46,565	$11,747	$615	'	$21,760	$237	$80,924
Balance (in Shares) at Dec. 31, 2010	3,338	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Preferred stock issued	'	'	'	12,600	'	'	12,600
Redemption of preferred stock	'	-12,017	-600	'	17	'	-12,600
Net earnings	'	'	'	'	4,257	'	4,257
Total comprehensive earnings (losses)	'	'	'	'	'	3,037	3,037
Dividends and accretion on preferred stock	'	270	-15	'	-800	'	-545
Dividends on common stock	'	'	'	'	-568	'	-568
Cash in lieu of fractional shares	'	'	'	'	-2	'	-2
Dividend declared	'	'	'	'	-211	'	-211
Stock dividend of 5%	2,026	'	'	'	-2,026	'	'
Stock dividend of 5% (in Shares)	167	'	'	'	'	'	'
Stock options exercised	11	'	'	'	'	'	11
Stock options exercised (in Shares)	1	'	'	'	'	'	'
Stock-based compensation expense	293	'	'	'	'	'	293
Balance at Dec. 31, 2011	48,895	'	'	12,600	22,427	3,274	87,196
Balance (in Shares) at Dec. 31, 2011	3,506	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Net earnings	'	'	'	'	8,803	'	8,803
Total comprehensive earnings (losses)	'	'	'	'	'	594	594
Dividends on preferred stock	'	'	'	'	-658	'	-658
Dividends on common stock	'	'	'	'	-667	'	-667
Cash in lieu of fractional shares	'	'	'	'	-5	'	-5
Dividend declared	'	'	'	'	-296	'	-296
Stock dividend of 5%	3,324	'	'	'	-3,324	'	'
Stock dividend of 5% (in Shares)	176	'	'	'	'	'	'
Stock options exercised	151	'	'	'	'	'	151
Stock options exercised (in Shares)	17	'	'	'	'	'	'
Tax benefit-options exercised	30	'	'	'	'	'	30
Stock-based compensation expense	210	'	'	'	'	'	210
Balance at Dec. 31, 2012	52,610	'	'	12,600	26,280	3,868	95,358
Balance (in Shares) at Dec. 31, 2012	3,699	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Redemption of preferred stock	'	'	'	-3,150	'	'	-3,150
Net earnings	'	'	'	'	7,439	'	7,439
Total comprehensive earnings (losses)	'	'	'	'	'	-5,124	-5,124
Dividends on preferred stock	'	'	'	'	-567	'	-567
Dividends on common stock	'	'	'	'	-1,054	'	-1,054
Cash in lieu of fractional shares	'	'	'	'	-4	'	-4
Dividend declared	'	'	'	'	-398	'	-398
Stock dividend of 5%	4,958	'	'	'	-4,958	'	'
Stock dividend of 5% (in Shares)	189	'	'	'	'	'	'
Stock options exercised	1,067	'	'	'	'	'	1,067
Stock options exercised (in Shares)	91	'	'	'	'	'	'
Tax benefit-options exercised	354	'	'	'	'	'	354
Stock-based compensation expense	328	'	'	'	'	'	328
Balance at Dec. 31, 2013	$59,317	'	'	$9,450	$26,738	($1,256)	$94,249
Balance (in Shares) at Dec. 31, 2013	3,979	'	'	'	'	'	'

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Stockholders' Equity (Parentheticals)	1 Months Ended	12 Months Ended
	Oct. 28, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Stockholders' Equity [Abstract]	'	'	'	'
Stock dividend, percentage	5.00%	5.00%	5.00%	5.00%

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net earnings	$7,439	$8,803	$4,257
Adjustments to reconcile net earnings to net cash provided by operating activities:	'	'	'
Depreciation, amortization and accretion	3,708	3,493	2,803
Gain on sale of securities available-for-sale	-324	-958	-479
Gain on sale of other real estate owned	-96	-6	-66
Loss on impairment of other real estate owned	69	53	543
Stock-based compensation expense	328	210	293
Earnings on bank owned life insurance	-366	-769	-325
Provision for loan losses	1,385	1,833	1,750
Bargain purchase gain	'	-3,666	'
Deferred taxes	341	-271	-308
(Increase) decrease in accrued interest receivable	-48	251	151
Decrease in prepaid expense	671	735	736
(Increase) decrease in other assets	-278	-3,177	1,832
Increase (decrease) increase in accrued expenses and other liabilities	1,818	2,537	-925
Net cash provided by operating activities	14,647	9,068	10,262
Cash flows from investing activities:	'	'	'
Cash paid for acquisition, net of cash acquired	'	-18,374	'
Proceeds from matured/called/sold securities available-for-sale	53,392	68,205	41,694
Purchases of securities available-for-sale	-93,256	-102,212	-98,861
Redemptions (purchases) of other equity securities	164	-856	638
Redemption of time deposits of other banks	7,673	3,880	'
Net (increase) decrease in loans	-12,115	-1,345	28,738
Increase in bank-owned life insurance	'	-1,879	'
Proceeds from sale of other real estate owned	1,384	932	4,078
Net investment in other real estate owned	-25	-31	-3
Proceeds from sales of bank premises, equipment, and leasehold improvements	15	'	2
Purchases of bank premises, equipment, and leasehold improvements	-1,068	-850	-1,181
Net cash used in investing activities	-43,836	-52,530	-24,895
Cash flows from financing activities:	'	'	'
Net increase in demand and savings deposits	52,177	60,284	9,887
Net decrease in time deposits	-46,914	-21,379	-16,549
Net advances (repayment) of FHLB borrowings	13,780	-4,877	'
Cash dividends paid on common stock	-1,054	-667	-568
Cash in lieu of fractional shares	-4	-5	-3
Exercise of stock options	1,067	151	11
Cash dividends paid of preferred stock	'	'	-545
Redemption of preferred stock series A and B	'	'	-12,600
Net cash provided (used in) by financing activities	15,335	32,849	-7,767
Net decrease in cash and cash equivalents	-13,854	-10,613	-22,400
Cash and cash equivalents at beginning of year	27,861	38,474	60,874
Cash and cash equivalents at end of year	14,007	27,861	38,474
Additional cash flow information:	'	'	'
Interest paid	2,519	2,676	3,345
Income taxes paid	1,235	1,907	1,955
Non-cash investing and financing activities:	'	'	'
Accrued dividends	398	296	210
Change in fair value of available-for-sale securities, net of tax effect	-5,124	594	3,037
Loans transferred to other real estate owned	'	4,863	619
Deemed dividends on preferred stock	'	'	255
Acquisition:	'	'	'
Assets acquired	'	117,929	'
Liabilities assumed	'	114,263	'
Preferred Stock series C	'	'	'
Cash flows from financing activities:	'	'	'
Cash dividends paid of preferred stock	-567	-658	'
Issuance (redemption) of preferred stock series C	($3,150)	'	$12,600

The_Company_and_Summary_of_Sig

The Company and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

The Company and Summary of Significant Accounting Policies

-1

The Company and Summary of Significant Accounting Policies

FNB Bancorp (the “Company”) is a bank holding company registered under the Bank Holding Company Act of 1956, as amended. The Company was incorporated under the laws of the State of California on February 28, 2001. The consolidated financial statements include the accounts of FNB Bancorp and its wholly-owned subsidiary, First National Bank of Northern California (the “Bank”). The Bank provides traditional banking services in San Mateo and San Francisco counties, and operates a loan production office in Santa Clara county.

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and revenue and expenses during the reporting period. Actual results could differ from those estimates. For the Bank, the significant accounting estimates are the allowance for loan losses, the valuation of goodwill, the valuation of the allowance for deferred tax assets and fair value determinations such as OREO and impaired loans. A summary of the significant accounting policies applied in the preparation of the accompanying consolidated financial statements follows.

(a)

Basis of Presentation

The accounting and reporting policies of the Company and its wholly-owned subsidiary are in accordance with accounting principles generally accepted in the United States of America. All intercompany balances and transactions have been eliminated.

(b)

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand, amounts due from banks, and federal funds sold. Generally, federal funds are sold for one-day periods. The cash equivalents are readily convertible to known amounts of cash and present insignificant risk of changes in value due to original maturity dates of 90 days or less. Included in cash and cash equivalents are restricted balances at the Federal Reserve Bank of San Francisco which relate to a minimum cash reserve requirement of approximately $1,278,000 and $1,461,000 at December 31, 2013 and 2012, respectively.

(c)

Investment Securities

Investment securities consist of U.S. Treasury securities, U.S. agency securities, obligations of states and political subdivisions, obligations of U.S. corporations, mortgage-backed securities and other securities. At the time of purchase of a security, the Company designates the security as held-to-maturity or available-for-sale, based on its investment objectives, operational needs, and intent to hold. The Company classifies securities as held to maturity only if and when it has the positive intent and ability to hold the security to maturity. The Company does not purchase securities with the intent to engage in trading activity. Held to maturity securities are recorded at amortized cost, adjusted for amortization of premiums or accretion of discounts. The Company did not have any investments in the held-to-maturity portfolio at December 31, 2013 or 2012. Securities available-for-sale are recorded at fair value with unrealized holding gains or losses, net of the related tax effect, reported as a separate component of stockholders’ equity until realized.

An impairment charge will be recorded if the Company has the intent to sell a security that is currently in an unrealized loss position or where the Company may be required to sell a security that is currently in an unrealized loss position. A decline in the market value of any security available-for-sale or held-to-maturity below cost that is deemed other than temporary will cause a charge to earnings to be recorded and the corresponding establishment of a new cost basis for the security. Amortization of premiums and accretion of discounts on debt securities are included in interest income over the life of the related security held-to-maturity or available-for-sale using the effective interest method. Dividend and interest income are recognized when earned. Realized gains and losses for securities classified as available-for-sale and held-to-maturity are included in earnings and are derived using the specific identification method for determining the cost of securities sold.

Investments with fair values that are less than amortized cost are considered impaired. Impairment may result from either a decline in the financial condition of the issuing entity or, in the case of fixed interest rate investments, from rising interest rates. At each consolidated financial statement date, management assesses each investment to determine if impaired investments are temporarily impaired or if the impairment is other than temporary. This assessment includes a determination of whether the Company intends to sell the security, or if it is more likely than not that the Company will be required to sell the security before recovery of its amortized cost basis less any current-period credit losses. For debt securities that are considered other than temporarily impaired and that the Company does not intend to sell and will not be required to sell prior to recovery of the amortized cost basis, the amount of impairment is separated into the amount that is credit related (credit loss component) and the amount due to all other factors. The credit loss component is recognized in earnings and is calculated as the difference between the security’s amortized cost basis and the present value of its expected future cash flows. The remaining difference between the security’s fair value and the present value of the future expected cash flows is deemed to be due to factors that are not credit related and is recognized in other comprehensive earnings.

(d)

Derivatives

All derivatives contracts and instruments are recognized as either assets or liabilities in the balance sheet and measured at fair value. The Company did not hold any derivative contracts at December 31, 2013 or 2012.

(e)

Loans

Loans are reported at the principal amount outstanding, net of deferred loan fees and the allowance for loan losses. An unearned discount on installment loans is recognized as income over the terms of the loans by the interest method. Interest on other loans is calculated by using the simple interest method on the daily balance of the principal amount outstanding. Loan fees net of certain direct costs of origination, which represent an adjustment to interest yield, are deferred and amortized over the contractual term of the loan using the interest method.

Loans on which the accrual of interest has been discontinued are designated as nonaccrual loans. Accrual of interest on loans is discontinued either when reasonable doubt exists as to the full and timely collection of interest or principal when a loan becomes contractually past due by 90 days or more with respect to interest or principal. When a loan is placed on nonaccrual status, all interest previously accrued but not collected is reversed against current period interest income. Interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of management, the loans are estimated to be fully collectible as to both principal and interest.

A loan is considered impaired if, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due, according to the contractual terms of the loan agreement. An impaired loan is measured based upon the present value of future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of collateral if the loan is collateral dependent. Interest on impaired loans is recognized on a cash basis. If the measurement of the impaired loan is less than the recorded investment in the loan, an impairment is recognized by a charge to the allowance for loan losses. Large groups of smaller balance loans are collectively evaluated for impairment.

Restructured loans are loans on which concessions in terms have been granted because of the borrowers’ financial difficulties. Interest is generally accrued on such loans in accordance with the new terms, once the borrower has demonstrated a history of at least six months repayment. A loan is considered to be a troubled debt restructuring when the Bank, for economic or legal reasons related to the debtor’s financial difficulties grants a concession to the debtor that makes it easier for the debtor to make their required loan payments. The concession may take the form of a temporary reduction in the interest rate or monthly payment amount due or may extend the maturity date of the loan. Other financial concessions may be agreed to as conditions warrant. Troubled debt restructured loans are accounted for as impaired loans. For an impaired loan that has been restructured, the contractual terms of the loan agreement refer to the contractual terms specified by the original loan agreement, not the contractual terms specified by the restructuring agreement.

Loans acquired in business combinations are recorded on a loan-by-loan basis at their estimated fair value. The Company uses third party valuation specialists to determine the estimated fair value on all acquired loans. The Company acquires both performing and impaired loans (loans acquired with evidence of credit quality deterioration at the time of purchase) in its acquisitions. For acquired performing loans, any discount or premium related to fair value adjustments at the time of purchase is recognized as interest income over the estimated life of the loan using the effective yield method. Loans acquired with evidence of credit quality deterioration, at the time of purchase, are accounted for under ASC 310-30. Loans and Debt Securities Acquired with Deteriorated Credit Quality (“ASC 310-30 Loans”). For ASC 310-30 Loans, the excess of cash flows expected to be collected over a loan’s carrying value is considered to be the accreteable yield and is recognized as interest income over the estimated life of the loan using the effective yield method. The acquisition date estimates of accreteable yield may subsequently change due to changes in management’s estimates of timing and amounts of expected cash flows. The excess of the contractual amounts due over the cash flows expected to be collected is considered to be the nonaccretable difference. The nonaccretable difference represents the Company’s estimate of the credit losses expected to occur and is considered in determining the fair value of the loans as of the acquisition date. Subsequent to the acquisition date, any increases in expected cash flows over those expected at acquisition date in excess of fair value are adjusted through an increase to the accreteable yield on a prospective basis. Any subsequent decreases in cash flows attributable to credit deterioration are recognized by recording additional provision for loan losses.

(f)

Allowance for Loan Losses

The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged off against the allowance for loan losses when management believes that the collectability of the principal is unlikely. The allowance is an amount that management believes will be adequate to absorb probable losses inherent in existing loans, standby letters of credit, overdrafts, and commitments to extend credit based on evaluations of collectability and prior loss experience. The evaluations take into consideration such factors as changes in the nature and volume of the portfolio, overall portfolio quality, loan concentrations, specific problem loans and current and anticipated economic conditions that may affect the borrowers’ ability to pay. While management uses these evaluations to determine the level of the allowance for loan losses, future provisions may be necessary based on changes in the factors used in the evaluations. Material estimates relating to the determination of the allowance for loan losses are particularly susceptible to significant change in the near term. Management believes that the allowance for loan losses is adequate as of December 31, 2013. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in economic conditions, and our borrowers’ ability to pay. In addition, the banking regulators, as an integral part of its examination process, periodically review the Bank’s allowance for loan losses. The banking regulators may require the Bank to recognize additions to the allowance based on their judgment about information available to them at the time of their examination.

(g)

Premises and Equipment

Premises and equipment are reported at cost less accumulated depreciation using the straight-line method over the estimated service lives of related assets ranging from 3 to 50 years. Leasehold improvements are amortized over the estimated lives of the respective leases or the service lives of the improvements, whichever is shorter.

(h)

Other Real Estate Owned

Real estate properties acquired through, or in lieu of, loan foreclosure are to be sold and are initially recorded at the lower of the carrying amount of the loan or fair value of the property at the date of foreclosure less selling costs. Subsequent to foreclosure, valuations are periodically performed, and any subsequent revisions in the estimate of fair value are reported as an adjustment to the carrying value of the real estate, provided the adjusted carrying amount does not exceed the original amount at foreclosure. Revenues and expenses from operations and changes in the valuation allowance are included in other operating expenses. The Company may make loans to facilitate the sale of foreclosed real estate. Gains and losses on financed sales are recorded in accordance with the appropriate accounting standard, taking into account the buyer’s initial and continuing investment in the property, potential subordination and transfer of ownership.

(i)

Goodwill and Other Intangible Assets

Goodwill is recognized in a business acquisition transaction when the acquisition purchase price exceeds the fair market value of identified tangible and intangible assets and liabilities. Goodwill is subsequently evaluated for possible impairment at least annually. If impairment is determined to exist, it is recorded in the period it is identified. The Company evaluated goodwill at December 31, 2013, and found no impairment.

Other intangible assets consist of core deposit and customer intangible assets that are initially recorded at fair value and subsequently amortized over their estimated useful lives, usually no longer than a seven year period.

(j)

Cash Dividends

The Company’s ability to pay cash dividends is subject to restrictions set forth in the California General Corporation Law. Funds for payment of any cash dividends by the Company would be obtained from its investments as well as dividends and/or management fees from the Bank. The Bank’s ability to pay cash dividends is also subject to restrictions imposed under the National Bank Act and regulations promulgated by the Office of the Comptroller of the Currency.

(k)

Stock Dividend

On October 28, 2013, the Company announced that its Board of Directors had declared a five percent (5%) stock dividend which resulted in 189,218 shares, payable at the rate of one share of Common Stock for every twenty (20) shares of Common Stock owned. The stock dividend was paid on December 23, 2013, to stockholders of record on December 2, 2013. The earnings per share data for all periods presented has been adjusted for stock dividends, except for the Consolidated Statement of Changes in Stockholders’ Equity and Comprehensive Earnings, which shows the historical rollforward of stock dividends declared.

(l)

Other Income

Other income includes the following major items:

2013

2012

2011

Dividend income-other equity securities

262

138

Rental Income-other real estate owned

249

All other smaller items

352

240

293

Total other income

863

426

467

(m)

Other Expense

Other expense includes the following major items:

2013

2012

2011

dues and memberships

109,000

111,000

104,000

real estate appraisals

129,000

72,000

83,000

Training and seminars

86,000

82,000

79,000

Amortization of deposit premium

68,000

100,000

98,000

Mastercard

98,000

97,000

100,000

Dunbar courier

113,000

107,000

104,000

OCC Assessment

215,000

171,000

261,000

All other smaller items

425,000

734,000

458,000

Total other expense

1,243,000

1,474,000

1,287,000

(n)

Income Taxes

Deferred income taxes are determined using the asset and liability method. Under this method, the net deferred tax asset or liability is recognized for tax consequences of temporary differences by applying current tax rates to differences between the financial reporting and the tax basis of existing assets and liabilities. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. A valuation allowance is established through the provision for income taxes for any deferred tax assets where the utilization of the asset is in doubt. During 2013, the Company recorded a reversal of the deferred tax asset valuation allowance of $934,000 for tax credit carry-forwards from the Bank’s investment in low income housing real estate partnerships. As changes in tax laws or rates are enacted, or as significant changes financial projections, deferred tax assets and liabilities are adjusted through the provision for income taxes.

The Company had unrecognized tax benefits of $718,000 and $725,000 as of December 31, 2013 and 2012, respectively. These unrecognized tax benefits are related to income tax uncertainties surrounding the Bank’s Enterprise Zone net interest deduction. The Bank is currently being audited by the Franchise Tax Board for the years ended December 31, 2005 through 2008, and the outcome of these audits is uncertain.

The Company recognizes interest accrued and penalties related to unrecognized tax benefits in tax expense. During the years ended December 31, 2013 and 2012, the Company believes that any penalties and interest penalties that may exist are not material and the Company has not accrued for them.

At December 31, 2013, the Bank had a $1,806,000 investment in six partnerships, which own low-income affordable housing projects that generate tax benefits in the form of federal and state housing tax credits. As a limited partner investor in these partnerships, the Company receives tax benefits in the form of tax deductions from partnership operating losses and federal and state income tax credits. The federal and state income tax credits are earned over a 10-year period as a result of the investment properties meeting certain criteria and are subject to recapture for noncompliance with such criteria over a 15-year period. The expected benefit resulting from the low-income housing tax credits is recognized in the period for which the tax benefit is recognized in the Company’s consolidated tax returns. These investments are accounted for using the historical cost method less depreciation and amortization and are recorded in other assets on the balance sheet. The Company recognizes tax credits as they are allocated and amortizes the initial cost of the investments over the period that tax credits are allocated to the Company. There is no residual value for the investment at the end of the tax credit allocation period. Cash received from operations of the limited partnership or sale of the properties, if any, will be included in earnings when realized.

(o)

Earnings per Share

Basic earnings per share is computed by dividing net income by the weighted average common shares outstanding, adjusted for stock dividends and splits. Diluted earnings per share reflects potential dilution from outstanding stock options, using the treasury stock method. There were 179,624, 271,655, and 342,030 anti-dilutive shares in the years ended December 31, 2013, 2012 and 2011, respectively, which were not included in the calculation. Reconciliation of weighted average shares used in computing basic and diluted earnings per share is as follows:

(Number of shares in thousands)

2013

2012

2011

Weighted average common shares outstanding-used in computing basic earnings per share

3,935

3,879

3,873

Dilutive effect of stock options outstanding, using the treasury stock method

Shares used in computing diluted earnings per share

4,024

3,943

3,893

(p)

Stock Option Plans

Measurement of the cost of stock options granted is based on the grant-date fair value of each stock option granted using the Black-Scholes valuation model. The cost is then amortized to expense on a straight-line basis over each option’s requisite service period. The amortized expense of the stock option’s fair value has been included in salaries and employee benefits expense for the three years ended December 31, 2013, 2012 and 2011. The expected term of options granted is derived from the output of the option valuation model and represents the period of time that options granted are expected to be outstanding. The risk-free rate for periods within the contractual life of the option is based on the U. S. Treasury yield curve in effect at the time of the grant. The Company’s stock has limited liquidity and limited trading activity. Volatility was calculated using historical price changes on a monthly basis over the expected life of the option.

(q)

Fair Values of Financial Instruments

The accounting standards provide for a fair value measurement framework that quantifies fair value estimates by the level of pricing precision. The degree of judgment utilized in measuring the fair value of assets generally correlates to the level of pricing precision. Financial instruments rarely traded or not quoted will generally have a higher degree of judgment utilized in measuring fair value. Pricing precision is impacted by a number of factors including the type of asset or liability, the availability of the asset or liability, the market demand for the asset or liability, and other conditions that were considered at the time of the valuation.

In general, fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs include quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability, such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

(r)

Bank Owned Life Insurance

The Company purchased insurance on the lives of certain executives. The policies accumulate asset values to meet future liabilities including the payment of employee benefits such as the deferred compensation plan. Changes in the cash surrender value are recorded as other noninterest income in the consolidated statements of earnings.

(s)

Federal Home Loan Bank Borrowings

The Bank maintains a collateralized line of credit with the Federal Home Loan Bank (“FHLB”) of San Francisco. Under this line, the Bank may borrow on a short term or a long term (over one year) basis. FHLB advances are recorded and carried at their historical cost. FHLB advances are not transferable and may contain prepayment penalties. In addition to the collateral pledged, the Company is required to hold prescribed amounts of FHLB stock that vary with the usage of FHLB borrowings.

(t)

Reclassifications

Certain prior year information has been reclassified to conform to current year presentation. The reclassifications had no impact on consolidated net earnings or retained earnings.

(u)

Recent Accounting Pronouncements

In January 2013, the FASB issued ASU No. 2013-01, Clarifying the Scope of disclosures about Offsetting Assets and Liabilities. The Update clarifies that ASU 2011-11 applies only to derivatives, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset or subject to an enforceable master netting arrangement or similar agreement. Entities with other types of financial assets and financial liabilities subject to a master netting agreement or similar agreement are no longer subject to the disclosure requirements in ASU 2011-11. The amendments are effective for annual and interim reporting periods beginning on or after January 1, 2013. The adoption of ASU did not have a material impact on the Company’s consolidated financial statements.

In February of 2013, the FASB issued ASU No. 2013-02 “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” The objective of this Update is to improve the reporting of reclassifications out of accumulated other comprehensive income. The amendments in this Update seek to attain that objective by requiring an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. generally accepted accounting principles (GAAP) to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. This would be the case when a portion of the amount reclassified out of accumulated other comprehensive income is reclassified to a balance sheet account (for example, inventory) instead of directly to income or expense in the same reporting period. The amendments are effective prospectively for reporting periods beginning after December 15, 2012. The adoption of ASU No. 2013-02 did not have a material impact on the Company’s consolidated financial statements.

In April 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740). This ASU requires an entity to present in the financial statements an unrecognized tax benefit as a liability and the unrecognized tax benefit should not be combined with deferred tax assets to the extent that a net operating loss carry-forward, tax loss or credit carry-forward is also not available at the reporting date. The amendment is to be applied prospectively to all unrecognized tax benefits and are effective for annual and interim reporting periods beginning after December 15, 2013. The Company does not expect this ASU to have a material impact on the Company’s consolidated financial statements.

Management has reviewed the remaining Accounting Standards Updates (ASU; 2013-03 through 2013-10) and concluded that none are applicable to the Company’s current operations.

In January 2014, the FASB issued ASU No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon foreclosure. ASU 2014-04 clarifies that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan Through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments are effective for annual and interim reports beginning on or after December 15, 2014 and can be applied with a modified retrospective transition method or prospectively. The adoption of ASU 2014-04 is not expected to have a material impact on the Company’s consolidated financial statements.

Oceanic_Bank_Acquisition

Oceanic Bank Acquisition	12 Months Ended
Oceanic Bank Acquisition	Dec. 31, 2013
Business Combinations [Abstract]	'
Oceanic Bank Acquisition	'
	2)	Oceanic Bank Acquisition

	On September 21, 2012, FNB Bancorp completed its acquisition of all of the outstanding stock of Oceanic Bank Holding, Inc. And Oceanic Bank, a California banking corporation and the Company’s wholly-owned subsidiary. Effective the same date, Oceanic Bank was merged into First National Bank of Northern California and Oceanic Bank Holding, Inc. was merged into FNB Bancorp.

	The following table presents the Oceanic Bank acquisition presented at fair value as of the acquisition date, September 21, 2012:

			September 21,
	(Dollars in thousands)		2012
	Assets acquired:

	Cash and due from banks		$	(1,278	)
	Investment securities, available for sale			13,387
	Loans			103,194
	Premises and equipment, net			12
	Core deposit intangible			110
	Other assets			2,504
	Total assets acquired		$	117,929

	Liabilities assumed:

	Noninterest-bearing deposits			11,755
	Interest-bearing deposits			95,914
	Borrowings			6,097
	Accrued expenses and other liabilities			497
	Total liabilities assumed		$	114,263

	Net assets acquired/Bargain purchase gain		$	3,666

	The Company was able to record a bargain purchase gain related to this acquisition in the amount of $3,666,000. The bargain purchase gain is shown as a separate line item in the Company’s 2012 Consolidated Statement of Earnings. On a pro forma basis, the earnings of Oceanic Bank would not have been material to the Company for the year ended December 31, 2012.

	Subsequent to the acquisition, the Bank closed the Oceanic Bank branch that operated on the Island of Guam and also closed the San Francisco, CA branch that operated from Post Street. Additional space was leased to include all the downstairs space at the Battery Street location and the Post Street operations were consolidated into the Battery Street branch location. These branch closures and consolidations reduced our branch facilities costs by approximately $30,000 per month beginning in August, 2013.

Restricted_Cash_Balance

Restricted Cash Balance	12 Months Ended
	Dec. 31, 2013
Restricted Cash Disclosure [Abstract]	'
Restricted Cash Balance	'
		-3	Restricted Cash Balance

	Cash and due from banks includes balances with the Federal Reserve Bank of San Francisco (the FRB). The Bank is required to maintain specified minimum average balances with the FRB, based primarily upon the Bank’s deposit balances. As of December 31, 2013 and 2012, the Bank maintained deposits in excess of the FRB reserve requirement, which was $1,278,000 and $1,461,000, respectively.

Securities_AvailableforSale

Securities Available-for-Sale	12 Months Ended
Securities Available-for-Sale	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Securities Available-for-Sale	'
	-4	Securities Available-for-Sale
	The amortized cost and carrying values of securities available-for-sale are as follows:

	(Dollar amounts in thousands)		Amortized		Unrealized			Unrealized			Carrying
			cost		gains			losses			value
	December 31, 2013:
	U.S. Treasury securities		$	3,069	$	12		$	(54	)	$	3,027
	Obligations of U.S. government agencies			73,691		488			(860	)		73,319
	Mortgage-backed securities			79,873		360			(2,373	)		77,860
	Obligations of states and political subdivisions			82,526		1,467			(1,317	)		82,676
	Corporate debt			26,958		330			(182	)		27,106
			$	266,117	$	2,657		$	(4,786	)	$	263,988

	December 31, 2012:
	U.S. Treasury securities		$	7,145	$	135		$	—		$	7,280
	Obligations of U.S. government agencies			71,061		1,206			(7	)		72,260
	Mortgage-backed securities			53,934		1,383			(137	)		55,180
	Obligations of states and political subdivisions			78,147		3,515			(53	)		81,609
	Corporate debt			18,103		535			(22	)		18,616
			$	228,390	$	6,774		$	(219	)	$	234,945
	An analysis of gross unrealized losses within the available-for-sale investment securities portfolio as of December 31, 2013 and December 31, 2012 follows:

			Total		< 12 Months			Total			12 Months or >			Total		Total
	December 31, 2013:		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	(Dollar amounts in thousands)		Value		Losses			Value			Losses			Value		Losses
	U. S. Treasury securities			2,002		(54	)		—			—			2,002		(54	)
	Obligations of U.S. government agencies			40,108		(860	)		—			—			40,108		(860	)
	Mortgage-backed securities			51,419		(2,015	)		5,664			(358	)		57,083		(2,373	)
	Obligations of states and political subdivisions			33,265		(1,248	)		1,083			(69	)		34,348		(1,317	)
	Corporate debt			10,857		(180	)		498			(2	)		11,355		(182	)
	Total		$	137,651	$	(4,357	)	$	7,245		$	(429	)	$	144,896	$	(4,786	)

			Total		< 12 Months			Total			12 Months or >			Total		Total
	December 31, 2012:		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	(Dollar amounts in thousands)		Value		Losses			Value			Losses			Value		Losses
	Obligations of U.S. government agencies			4,093		(7	)		—			—			4,093		(7	)
	Mortgage-backed securities			8,580		(137	)		—			—			8,580		(137	)
	Obligations of states and political subdivisions			8,492		(53	)		—			—			8,492		(53	)
	Corporate debt			—		—			478			(22	)		478		(22	)
	Total		$	21,165	$	(197	)	$	478		$	(22	)	$	21,643	$	(219	)

	At December 31, 2013, there were five securities in an unrealized loss position for greater than 12 consecutive months. At December 31, 2012, there was one security in an unrealized loss position for greater than 12 consecutive months. Management periodically evaluates each security in an unrealized loss position to determine if the impairment is temporary or other-than-temporary. Management has determined that no investment security is other-than-temporarily impaired at December 31, 2013 and 2012. The unrealized losses are due solely to interest rate changes, and the Company does not intend to sell nor expects it will be required to sell investment securities identified with impairments resulting from interest rate declines prior to the earliest of forecasted recovery or the maturity of the underlying investment security.

	The amortized cost and carrying value of debt securities as of December 31, 2013, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	(Dollar amounts in thousands)		Amortized		Carrying
			Cost		Value
	Available-for-sale:
	Due in one year or less		$	14,443	$	14,569
	Due after one through five years			96,703		97,184
	Due after five years through ten years			116,484		114,537
	Due after ten years			38,487		37,698
			$	266,117	$	263,988
	At December 31, 2013 and 2012, securities with an amortized cost of $70,678,000 and $81,978,000, and fair value of $70,640,000 and $84,399,000, respectively, were pledged as collateral for public deposits and for other purposes required by law.

	As of December 31, 2013 and 2012, the Bank had investments in Federal Home Loan Bank stock classified as other equity security in the accompanying balance sheets of $3,988,000 and $4,154,000, respectively. As of December 31, 2013 and 2012, the Bank had investments in FRB of $1,062,000, also carried among other equity securities. These investments are carried at cost, and evaluated periodically for impairment. Federal Home Loan Bank and FRB stock can be redeemed at par by the government agencies. These securities cannot be sold to other investors. Management reviews the financial statements, credit rating and other pertinent financial information of these entities in order to determine if impairment has occurred. So long as there is sufficient evidence to support the ability of these entities to continue to redeem their stock, management believes these securities are not impaired.

Loans

Loans	12 Months Ended
Loans	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Loans	'
		-5	Loans



	Loans are summarized as follows at December 31:



															Total
			FNB												Balance
			Bancorp												31-Dec
	(Dollar amounts in thousands)		Originated				PNCI				PCI				2013
	Commercial real estate		$	285,938			$	37,936			$	1,325			$	325,199
	Real estate construction			31,290				3,028				—				34,318
	Real estate multi-family			34,357				11,786				—				46,143
	Real estate 1 to 4 family			98,196				8,707				—				106,903
	Commercial & industrial			38,287				10,217				—				48,504
	Consumer loans			1,650				—				—				1,650
	Gross loans			489,718				71,674				1,325				562,717
	Net deferred loan fees			(495	)			—				—				(495	)
	Allowance for loan losses			(9,869	)			(10	)			—				(9,879	)
	Net loans		$	479,354			$	71,664			$	1,325			$	552,343

															Total
			FNB												Balance
			Bancorp												31-Dec
	(Dollar amounts in thousands)		Originated				PNCI				PCI				2012
	Commercial real estate		$	254,449			$	48,009			$	1,402			$	303,860
	Real estate construction			14,866				3,594				486				18,946
	Real estate multi-family			39,176				18,828				—				58,004
	Real estate 1 to 4 family			97,329				15,390				—				112,719
	Commercial & industrial			42,847				12,717				—				55,564
	Consumer loans			1,824				—				—				1,824
	Gross loans			450,491				98,538				1,888				550,917
	Net deferred loan fees			(230	)			—				—				(230	)
	Allowance for loan losses			(9,124	)			—				—				(9,124	)
	Net loans		$	441,137			$	98,538			$	1,888			$	541,563



	A summary of impaired loans, the related allowance for loan losses, average investment and income recognized on impaired loans follows. The following tables include originated and purchased non-credit impaired loans.



			Allowance for Loan Losses
			As of and For the Year Ended December 31, 2013
	(Dollar amounts in thousands)
															Real				Real
															Estate				Estate
			Commercial				Commercial				Real Estate				Multi				1 to
			& industrial				Real estate				Construction				family				4 family				Consumer				Total
	Allowance for credit losses

	Beginning balance		$	1,875			$	4,812			$	857			$	—			$	1,516			$	64			$	9,124
	Charge-offs			(57	)			(262	)			(81	)			—				(385	)			(7	)			(792	)
	Recoveries			73				35				50				—				3				1				162
	Provision			(654	)			1,178				(92	)			293				654				6				1,385
	Ending balance		$	1,237			$	5,763			$	734			$	293			$	1,788			$	64			$	9,879

	Ending balance: individually evaluated for impairment		$	176			$	165			$	—			$	—			$	254			$	—			$	595
	Ending balance: collectively evaluated for impairment		$	1,061			$	5,598			$	734			$	293			$	1,534			$	64			$	9,284

															Real				Real
														Estate				Estate
		Commercial				Commercial				Real Estate				Multi				1 to
		& industrial				Real Estate				Construction				family				4 family				Consumer				Total

Loans:
Ending balance		$	48,504			$	323,874			$	34,318			$	46,143			$	106,903			$	1,650			$	561,392

Ending balance: individually evaluated for impairment		$	2,497			$	17,974			$	189			$	375			$	4,077			$	—			$	25,112
Ending balance: collectively evaluated for impairment		$	46,007			$	305,900			$	34,129			$	46,143			$	102,826			$	1,650			$	536,655



There has been no additional impairment recognized on purchased credit impaired loans subsequent to acquisition.



		Allowance for Loan Losses
		As of and For the Year Ended December 31, 2012
(Dollar amounts in thousands)
														Real				Real
														Estate				Estate
		Commercial				Commercial				Real Estate				Multi				1 to
		& industrial				Real estate				Construction				family				4 family				Consumer				Total
Allowance for credit losses

Beginning balance		$	1,618			$	4,745			$	1,171			$	671			$	1,592			$	100			$	9,897
Charge-offs			(1,706	)			(738	)			(54	)			(242	)			(182	)			(11	)			(2,933	)
Recoveries			124				171				—				—				11				21				327
Provision			1,839				634				(260	)			(429	)			95				(46	)			1,833
Ending balance		$	1,875			$	4,812			$	857			$	—			$	1,516			$	64			$	9,124

Ending balance: individually evaluated for impairment		$	384			$	415			$	232			$	—			$	306			$	—			$	1,337
Ending balance: collectively evaluated for impairment		$	1,491			$	4,397			$	625			$	—			$	1,210			$	64			$	7,787

Loans:
Ending balance		$	55,564			$	302,458			$	18,460			$	58,004			$	112,719			$	1,824			$	549,029
Ending balance: individually evaluated for impairment		$	4,167			$	16,099			$	681			$	—			$	4,771			$	—			$	25,718
Ending balance: collectively evaluated for impairment		$	51,397			$	286,359			$	18,460			$	58,004			$	107,948			$	1,824			$	523,992



The following tables provide information pertaining to impaired loans originated and PNCI loans as of and for the years ended December 31, 2013 and 2012.



		As of and for the year ended December 31, 2013

						Unpaid								Average
(Dollar amounts in thousands)		Recorded				Principal				Related				Recorded				Income
		Investment				Balance				Allowance				Investment				Recognized

With no related allowance recorded
Commercial and industrial		$	1,059			$	1,232			$	—			$	1,204			$	66
Commercial real estate construction			—				—				—				—				—
Commercial real estate			12,397				13,535				—				11,445				565
Real estate multi family			375				375				—				384				25
Residential- 1 to 4 family			1,163				1,284				—				1,009				37
Total			14,994				16,426				—				14,042				693

With an allowance recorded
Commercial and industrial		$	1,438			$	1,871			$	166			$	1,710			$	15
Commercial real estate construction			189				196				10				198				18
Commercial real estate			5,577				5,588				165				4,972				254
Residential- 1 to 4 family			2,914				2,923				254				2,989				115
Total			10,118				10,578				595				9,869				402

Total
Commercial and industrial		$	2,497			$	3,103			$	166			$	2,914			$	81
Commercial real estate construction			189				196				10				198				18
Commercial real estate			17,974				19,123				165				16,417				819
Real estate multi family			375				375				—				384				25
Residential - 1 to 4 family			4,077				4,207				254				3,998				152
Grand total		$	25,112			$	27,004			$	595			$	23,911			$	1,095
		As of and for the year ended December 31, 2012

						Unpaid								Average
(Dollar amounts in thousands)		Recorded				Principal				Related				Recorded				Income
		Investment				Balance				Allowance				Investment				Recognized

With no related allowance recorded
Commercial and industrial		$	2,202			$	2,338			$	—			$	2,298			$	120
Commercial real estate construction			—				—				—				6,187				333
Commercial real estate			10,666				11,580				—				4,874				86
Residential- 1 to 4 family			1,052				1,147				—				1,065				55
Total			13,920				15,065				—				14,424				594

With an allowance recorded
Commercial and industrial		$	1,965			$	2,427			$	384			$	2,328			$	30
Commercial real estate construction			681				798				232				798				4
Commercial real estate			5,433				5,433				415				5,685				240
Residential- 1 to 4 family			3,719				3,722				306				3,283				150
Total			11,798				12,380				1,337				12,094				424

Total
Commercial and industrial		$	4,167			$	4,765			$	384			$	4,626			$	150
Commercial real estate construction			681				798				232				6,985				337
Commercial real estate			16,099				17,013				415				10,559				326
Residential - 1 to 4 family			4,771				4,869				306				4,348				205
Grand total		$	25,718			$	27,445			$	1,337			$	26,518			$	1,018



Nonaccrual loans totaled $7,351,000 and $12,474,000 as of December 31, 2013 and 2012. Not all impaired loans are in a non-accrual status. The difference between impaired loans and nonaccrual loans is primarily due to loans that have been restructured, that were performing under modified loan agreements. Interest on these loans is accrued in accordance with the modified loan terms.



		Loans on Nonaccrual Status as of
(Dollar amounts in thousands)		December 31,				December 31,
		2013				2012
Commercial & industrial		$	2,046			$	2,618
Real estate - construction			189				1,898
Commercial real estate			4,290				6,251
Real estate 1 to 4 family			826				1,707
Total		$	7,351			$	12,474



Interest income on impaired loans of $1,095,000, $1,018,000 and $1,143,000 was recognized based upon cash payments received in 2013, 2012, and 2011, respectively. The amount of interest on impaired loans not collected in 2013, 2012 and 2011, was $656,000, $1,358,000 and $1,137,000, respectively. The cumulative amount of unpaid interest on impaired loans was $3,430,000, $2,774,000 and $1,967,000 at December 31, 2013, 2012 and 2011, respectively.



The following is a summary of the number and principal amounts outstanding for troubled debt restructurings added during the years ended December 31, 2013 and 2012.



		Modifications
		For the Year Ended December 31, 2013
						Pre-				Post-
						Modification				Modification
						Outstanding				Outstanding
		Number of				Recorded				Recorded
		Contracts				Investment				Investment
(Dollar amounts in thousands)
Real Estate-construction			1			$	189			$	189
Real estate 1 to 4 family			3				1,236				1,236
Commercial real estate			6				4,566				4,566
Total			10			$	5,991			$	5,991

		Modifications
		For the Year Ended December 31, 2012
						Pre-				Post-
						Modification				Modification
						Outstanding				Outstanding
		Number of				Recorded				Recorded
		Contracts				Investment				Investment
(Dollar amounts in thousands)
Commercial & industrial			7			$	2,723			$	2,723
Real estate 1 to 4 family			3				1,446				1,446
Commercial real estate			3				1,409				1,409
Total			13			$	5,578			$	5,578



During the years ended December 31, 2013 and 2012, no loans defaulted within twelve months following the date of restructure. All restructurings were a modification of interest rate and/or payment. There were no principal reductions granted.

The following is a summary of the number and principal amounts outstanding for troubled debt restructurings at December 31, 2013 and 2012.



		Total troubled debt restructurings outstanding at year end
(dollars in thousands)		31-Dec-13												31-Dec-12
						Non-												Non-
		Accrual				accrual				Total				Accrual				accrual				Total
		status				status				modifications				status				status				modifications

Commercial & industrial		$	461			$	1,951			$	2,412			$	1,216			$	2,308			$	3,524
Real Estate construction			—				189				189				—				—				—
Real estate 1 to 4 family			2,121				529				2,650				333				1,113				1,446
Commercial real estate			6,315				2,140				8,455				2,614				1,981				4,595
Total		$	8,897			$	4,809			$	13,706			$	4,163			$	5,402			$	9,565



		Age Analysis of Past Due Loans
		As of December 31, 2013
(Dollar amounts in thousands)
		30-59				60-89																				Recorded
		Days				Days				Over				Total												Investment >
		Past				Past				90				Past								Total				90 Days and
Originated		Due				Due				Days				Due				Current				Loans				Accruing
Commercial real estate		$	1,403			$	—			$	2,349			$	3,752			$	282,186			$	285,938				—
Real estate construction			—				—				—				—				31,290				31,290				—
Real estate multi family			—				—				—				—				34,357				34,357
Real estate 1 to 4 family			161				75				826				1,062				97,134				98,196				—
Commercial & industrial			563				210				2,046				2,819				35,468				38,287
Consumer			116				19				—				135				1,515				1,650				—
Total		$	2,243			$	304			$	5,221			$	7,768			$	481,950			$	489,718			$	—

Purchased
Not credit impaired
Commercial real estate		$	—			$	—			$	616			$	616			$	37,320			$	37,936
Real estate construction			—				—				189				189				2,839				3,028
Real estate multi-family			—				—				—				—				11,786				11,786
Real estate 1 to 4 family			—				—				—				—				8,707				8,707
Commercial & industrial			—				—				—				—				10,217				10,217
Total		$	—			$	—			$	805			$	805			$	70,869			$	71,674

Purchased
Credit impaired
Commercial real estate		$	—			$	—			$	1,325			$	1,325			$	—			$	1,325
Real estate construction			—				—				—				—				—				—
Real estate multi-family			—				—				—				—				—				—
Real estate 1 to 4 family			—				—				—				—				—				—
Commercial & industrial			—				—				—				—				—				—
Total		$	—			$	—			$	1,325			$	1,325			$	—			$	1,325



All nonaccrual loans are included among loans that are over 90 days past due.


		Age Analysis of Past Due Loans
		As of December 31, 2012
(Dollar amounts in thousands)
		30-59				60-89																				Recorded
		Days				Days				Over				Total												Investment >
		Past				Past				90				Past								Total				90 Days and
Originated		Due				Due				Days				Due				Current				Loans				Accruing
Commercial real estate		$	3,942				—				2,525				6,467				247,982				254,449				—
Real estate construction			—				—				—				—				14,866				14,866				—
Real estate multi family			—				—				—				—				39,176				39,176				—
Real estate 1 to 4 family			806				168				1,210				2,184				95,145				97,329				—
Commercial & industrial			18				44				2,619				2,681				40,166				42,847				—
Consumer			—				—				—				—				1,824				1,824				—
Total		$	4,766			$	212			$	6,354			$	11,332			$	439,159			$	450,491			$	—

																										Recorded
																										Investment >
Purchased																										90 Days and
Not credit impaired																										Accruing
Commercial real estate		$	690			$	—			$	2,212			$	2,902			$	45,107			$	48,009				—
Real estate construction			—				—				1,411				1,411				2,183				3,594				—
Real estate multi-family			75				—				—				75				18,753				18,828				—
Real estate 1 to 4 family			—				119				—				119				15,271				15,390				—
Commercial & industrial			50				—				—				50				12,667				12,717				—
Total		$	815			$	119			$	3,623			$	4,557			$	93,981			$	98,538			$	—

																										Recorded
																										Investment >
Purchased																										90 Days and
Credit impaired																										Accruing
Commercial real estate		$	—			$	—			$	1402			$	1402			$	—			$	1,402				—
Real estate construction			—				—				486				486				—				486				—
Total		$	—			$	—			$	1,888			$	1,888			$	—			$	1,888			$	—



All nonaccrual loans are included among loans that are over 90 days past due.



Risk rating system



Loans to borrowers graded as pass or pooled loans represent loans to borrowers of acceptable or better credit quality. They demonstrate sound financial positions, repayment capacity and credit history. They have an identifiable and stable source of repayment.



Special mention loans have potential weaknesses that deserve management’s attention. If left uncorrected these potential weaknesses may result in a deterioration of the repayment prospects for the asset or in the Bank’s credit position at some future date. These assets are “not adversely classified” and do not expose the Bank to sufficient risk to warrant adverse classification.



Substandard loans are inadequately protected by current sound net worth, paying capacity of the borrower, or pledged collateral. Loans are normally classified as Substandard when there are unsatisfactory characteristics causing more than acceptable levels of risk. A substandard loan normally has one or more well-defined weakness that could jeopardize the repayment of the debt. For example, a) cash flow deficiency, which may jeopardize future payments; b) sale of non-collateral assets has become primary source of repayment; c) the borrower is bankrupt; or d) for any other reason, future repayment is dependent on court action.



Doubtful loans represent credits with weakness inherent in the Substandard classification and where collection or liquidation in full is highly questionable. To be classified Doubtful, there must be specific pending factors which prevent the Loan Review Officer from determining the amount of loss contained in the credit. When the amount of loss can be reasonably estimated, that amount is classified as “loss” and the remainder is classified as Substandard.



Commercial Real Estate Loans – Multi-Family



Our multi-family commercial real estate loans are secured by multi-family properties located primarily in San Mateo and San Francisco Counties. These loans are made to investors where the primary source of loan repayment is from cash flows generated by the properties, through rent collections. The borrowers’ promissory notes are secured with recorded liens on the underlying properties. The borrowers would normally also be required to personally guarantee repayment of the loans. The bank uses conservative underwriting standards in reviewing applications for credit. Generally, our borrowers have multiple sources of income, so if cash flow generated from the property declines, at least in the short term, the borrowers can normally cover these short term cash flow deficiencies from their available cash reserves. Risk of loss to the Bank is increased when there are cash flow decreases sufficiently large and for such a prolonged period of time that loan payments can no longer be made by the borrowers.



Commercial Real Estate Loans – Other



Commercial Real Estate loans consist of loans secured by non-farm, non-residential properties, including, but not limited to industrial, hotel, assisted care, retail, office and mixed use buildings.



Our commercial real estate loans are made primarily to investors or small businesses where our primary source of repayment is from cash flows generated by the properties, either through rent collection or business profits. The borrower’s promissory notes are secured with recorded liens on the underlying property. The borrowers would normally also be required to personally guarantee repayment of the loan. The Bank uses conservative underwriting standards in reviewing applications for credit. Generally, our borrowers have multiple sources of income, so if cash flow generated from the property declines, at least in the short term, the borrowers can normally cover these short term cash flow deficiencies from their available cash reserves. Risk of loss to the Bank is increased when there are cash flow decreases sufficiently large and for such a prolonged period of time that loan payments can no longer be made by the borrowers.



Real Estate Construction Loans



Our real estate construction loans are generally made to borrowers who are rehabilitating a building, converting a building use from one type of use to another, or developing land and building residential or commercial structures for sale or lease. The borrower’s promissory notes are secured with recorded liens on the underlying property. The borrowers would normally also be required to personally guarantee repayment of the loan. The Bank uses conservative underwriting standards in reviewing applications for credit. Generally, our borrowers have sufficient resources to make the required construction loan payments during the construction and absorption or lease-up period. After construction is complete, the loans are normally paid off from proceeds from the sale of the building or through a refinance to a commercial real estate loan. Risk of loss to the Bank is increased when there are material construction cost overruns, significant delays in the time to complete the project and/or there has been a material drop in the value of the projects in the marketplace since the inception of the loan.



Residential Real Estate Loans



Our residential real estate loans are generally made to borrowers who are buying or refinancing their primary personal residence or a rental property of 1-4 single family residential units. The Bank uses conservative underwriting standards in reviewing applications for credit. Risk of loss to the Bank is increased when borrowers lose their primary source of income and/or property values decline significantly.



Commercial and Industrial Loans



Our commercial and industrial loans are generally made to small businesses to provide them with at least some of the working capital necessary to fund their daily business operations. These loans are generally either unsecured or secured by fixed assets, accounts receivable and/or inventory. The borrowers would normally also be required to personally guarantee repayment of the loan. The Bank uses conservative underwriting standards in reviewing applications for credit. Risk of loss to the Bank is increased when our small business customers experience a significant business downturn, incur significant financial losses, or file for relief from creditors through bankruptcy proceedings.



Consumer and installment Loans



Our consumer and installment loans generally consist of personal loans, credit card loans, automobile loans or other loans secured by personal property. The Bank uses conservative underwriting standards in reviewing applications for credit. Risk of loss to the Bank is increased when borrowers lose their primary source of income, or file for relief from creditors through bankruptcy proceedings.


		Credit Quality Indicators
		As of December 31, 2013

(Dollar amounts in thousands)
						Special				Sub-								Total
Originated		Pass				mention				standard				Doubtful				loans
Commercial real estate		$	280,356			$	2,330			$	3,252			$	—			$	285,938
Real estate construction			29,673				573				1,044				—				31,290
Real estate multi-family			34,357				—				—				—				34,357
Real estate 1 to 4 family			97,514				—				429				253				98,196
Commercial & industrial			36,837				—				1,439				11				38,287
Consumer loans			1,631				—				19				—				1,650
Totals		$	480,368			$	2,903			$	6,183			$	264			$	489,718

Purchased
Not credit impaired
Commercial real estate		$	28,342			$	4,951			$	4,643			$	—			$	37,936
Real estate construction			1,520				—				1,508				—				3,028
Real estate multi-family			11,786				—				—				—				11,786
Real estate 1 to 4 family			8,299				—				408				—				8,707
Commercial & industrial			10,217				—				—				—				10,217
Total		$	60,164			$	4,951			$	6,559			$	—			$	71,674

Purchased
Credit impaired
Commercial real estate																		$	1,325
Total																		$	1,325



Purchased credit impaired loans are accounted as a pool and are not included in the Company’s risk-rated methodology.


		Credit Quality Indicators
		As of December 31, 2012

(Dollar amounts in thousands)
						Special				Sub-								Total
Originated		Pass				mention				standard				Doubtful				loans
Commercial real estate		$	249,991			$	2,372			$	2,086			$	—			$	254,449
Real estate construction			13,266				—				1,600				—				14,866
Real estate multi-family			39,176				—				—				—				39,176
Real estate 1 to 4 family			95,579				—				1,470				280				97,329
Commercial & industrial			39,446				—				2,564				837				42,847
Consumer loans			1,824				—				—				—				1,824
Totals		$	439,282			$	2,372			$	7,720			$	1,117			$	450,491

Purchased
Not credit impaired
Commercial real estate		$	30,600			$	7,902			$	9,507			$	—			$	48,009
Real estate construction			—				39				3,555				—				3,594
Real estate multi-family			18,828				—				—				—				18,828
Real estate 1 to 4 family			14,850				—				540				—				15,390
Commercial & industrial			12,717				—				—				—				12,717
Total		$	76,995			$	7,941			$	13,602			$	—			$	98,538

Purchased
Credit impaired
Commercial real estate																		$	1,402
Real estate construction																			486
Total																		$	1,888

Foreclosed_Assets

Foreclosed Assets	12 Months Ended
Foreclosed Assets	Dec. 31, 2013
Finance Loan And Lease Receivables Held For Investments Foreclosed Assets [Abstract]	'
Foreclosed Assets	'
		-6	Foreclosed Assets

	A summary of the activity in the balance of foreclosed assets follows:

			Year ended December 31,
	(Dollar amounts in thousands)		2013			2012			2011
	Beginning balance, net		$	6,650		$	2,747		$	6,680
	Additions/transfers from loans			25			4,894			622
	Disposition/sales			(1,288	)		(932	)		(4,012	)
	Valuation adjustments			(69	)		(59	)		(543	)
	Ending balance, net		$	5,318		$	6,650		$	2,747
	Ending valuation allowance		$	(122	)	$	(1,965	)	$	(2,041	)
	Ending number of foreclosed assets			4			5			4
	Proceeds from sale of foreclosed assets		$	1,288		$	932		$	4,078
	Gain on sale of foreclosed assets		$	96		$	6		$	66

Related_Party_Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
		-7	Related Party Transactions
	In the ordinary course of business, the Bank made loans and advances under lines of credit to directors, officers, and their related interests. The Bank’s policies require that all such loans be made at substantially the same terms as those prevailing at the time for comparable transactions with unrelated parties and do not involve more than normal risk or unfavorable features. The following summarizes activities of loans to such parties at December 31:

	(Dollar amounts in thousands)		2013			2012
	Balance, beginning of year		$	10,225		$	21,573
	Additions			6,990			6,358
	Repayments			(6,133	)		(17,706	)
	Balance, end of year		$	11,082		$	10,225

			2013			2012
	Related party deposits		$	3,491		$	2,682

Bank_Premises_Equipment_and_Le

Bank Premises, Equipment, and Leasehold Improvements	12 Months Ended
Bank Premises, Equipment, and Leasehold Improvements	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Bank Premises, Equipment, and Leasehold Improvements	'
		-8	Bank Premises, Equipment, and Leasehold Improvements
	Bank premises, equipment and leasehold improvements are stated at cost, less accumulated depreciation and amortization, and are summarized as follows at December 31:

	(Dollar amounts in thousands)		2013			2012
	Buildings		$	10,460		$	10,453
	Equipment & furniture			8,722			9,543
	Leasehold improvements			1,714			1,519
				20,896			21,515
	Accumulated depreciation and amortization			(13,712	)		(14,137	)
				7,184			7,378
	Land			5,328			5,328
			$	12,512		$	12,706

	Depreciation and amortization expense for the years ended December 31, 2013, 2012, and 2011 was $1,250,000, $1,415,000 and $1,487,000, respectively.

Deposits

Deposits	12 Months Ended
Deposits	Dec. 31, 2013
Debt Disclosure Text Block [Abstract]	'
Deposits	'
		-9	Deposits
	The aggregate amount of jumbo time certificates, each with a minimum denomination of $100,000 or more, was $86,337,000 and $122,734,000 at December 31, 2013 and 2012, respectively. At December 31, 2013, the scheduled maturities of all time certificates of deposit are as follows:

	Year ending December 31:
	(Dollar amounts in thousands)
	2014		$	96,881
	2015			12,946
	2016			10,745
	2017			3,462
	2018			118
			$	124,152

Federal_Home_Loan_Bank_Advance

Federal Home Loan Bank Advances	12 Months Ended
	Dec. 31, 2013
Federal Home Loan Bank Advances Disclosure [Abstract]	'
Federal Home Loan Bank Advances	'
		-10	Federal Home Loan Bank Advances

	As of December 31, 2013, there were $15,000,000 Federal Home Loan Bank borrowings outstanding, consisting of $2,000,000 at 0.06% due January 2, 2014 and $13,000,000 at 0.20% due January 10, 2014. At December 31, 2012, there were $1,220,000 Federal Home Loan Bank (“FHLB”) borrowings outstanding, consisting of $500,000 at 1.05% due January 31, 2013; $330,000 at 1.85% due January 22, 2013, and $390,000 at 4.99% due January 31, 2013.

	At December 31, 2013, the Bank had a maximum borrowing capacity under Federal Home Loan Bank advances of $271,829,000, of which the entire amount was available. The Federal Home Loan Bank advances are secured by a blanket collateral agreement pledge of FHLB stock and certain other qualifying collateral, such as commercial and mortgage loans. Interest rates are at the prevailing rate when advances are made.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
		-11	Commitments and Contingencies
	Operating Lease Commitments

	The Bank leases a portion of its facilities and equipment under non-cancelable operating leases expiring at various dates through 2024. Some of these leases provide that the Bank pay taxes, maintenance, insurance, and other occupancy expenses applicable to leased premises. Generally, the leases provide for renewal for various periods at stipulated rates. The minimum rental commitments under the operating leases as of December 31, 2013 are as follows:

	Year ending December 31:
	(Dollars in thousands)
	2014		$	971
	2015			990
	2016			1,010
	2017			1,021
	2018			556
	Thereafter			1,510
			$	6,058

	Total rent expense for operating leases was $1,339,000, $1,025,000 and $846,000, in 2013, 2012, and 2011, respectively.

	Legal Commitments

	The Bank is engaged in various lawsuits either as plaintiff or defendant in the ordinary course of business and, in the opinion of management, based upon the advice of counsel, the ultimate outcome of these lawsuits does not expect to have a material effect on the Bank’s financial condition or results of operations.

Salary_Deferral_Plan

Salary Deferral Plan (Salary Deferral Plan)	12 Months Ended
	Dec. 31, 2013
Salary Deferral Plan	'
Defined Benefit Plan Disclosure [Line Items]	'
Salary Deferral Plan	'
		-12	Salary Deferral Plan

	The Bank maintains a salary deferral 401(k) plan covering substantially all employees, known as the FNB Bancorp Savings Plan (the “Plan”). The Plan allows employees to make contributions to the Plan up to a maximum allowed by law, and the Bank’s contribution is discretionary. Beginning in 2008, the Board approved a safe harbor election related to the Plan which requires the Company to contribute 3% of qualifying employees wages as a profit sharing contribution. The Bank’s accrued contribution to the Plan for the years ended December 31, 2013, 2012, and 2011 was $398,000, $371,000, and $308,000, respectively.

Salary_Continuation_and_Deferr

Salary Continuation and Deferred Compensation Plans (Salary Continuation and Deferred Compensation Plans)	12 Months Ended
	Dec. 31, 2013
Salary Continuation and Deferred Compensation Plans	'
Defined Benefit Plan Disclosure [Line Items]	'
Salary Continuation and Deferred Compensation Plans	'
		-13	Salary Continuation and Deferred Compensation Plans

	The Bank maintains a Salary Continuation Plan for certain Bank officers. Officers participating in the Salary Continuation Plan are entitled to receive a monthly payment for a period of fifteen to twenty years upon retirement. The Company accrues such post-retirement benefits over the individual’s employment period. The Salary Continuation Plan expense for the years ended December 31, 2013, 2012, and 2011 was $401,879, $371,000, and $250,000, respectively. Accrued compensation payable under the salary continuation plan totaled $2,332,000 and $2,060,000 at December 31, 2013 and 2012, respectively.

	The Deferred Compensation Plan allows eligible officers to defer annually their compensation up to a maximum 80% of their base salary and 100% of their cash bonus. The officers are entitled to receive distribution upon reaching a specified age, passage of at least five years or termination of employment. As of December 31, 2013 and 2012, the related liability included in accrued expenses and other liabilities was $1,214,000 and $785,000, respectively.

Preferred_Stock

Preferred Stock	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Preferred Stock	'
		-14	Preferred Stock

	On September 15, 2011, the Company issued Preferred Stock as part of the Treasury’s Small Business Lending Fund (“SBLF”) as Preferred Stock – Series C – Non-Cumulative. The initial dividend rate is five percent. Depending on the volume of our small business lending, the dividend rate can be reduced to as low as one percent. If lending does not increase in the first two years, the dividend rate will increase to seven percent. After 4.5 years, the dividend rate will increase to nine percent if the Company has not repaid the SBLF funding.

	On May 6, 2013, 25% or $3,150,000 of the original $12,600,000 was redeemed. Subsequent to December 31, 2013, the remaining SBLF obligation of $9,450,000 was paid in full.

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
		-15	Income Taxes

	The provision (benefit) for income taxes for the years ended December 31, consists of the following:

	(Dollar amounts in thousands)		2013			2012			2011
	Current:
	Federal		$	697		$	467		$	1,201
	State			287			1,449			675
			$	984		$	1,916		$	1,876

	Deferred:
	Federal		$	197		$	420		$	(75	)
	State			144			(691	)		(233	)
				341			(271	)		(308	)
	Total provision for taxes		$	1,325		$	1,645		$	1,568

	The reason for the differences between the statutory federal income tax rate and the effective tax rates for the years ending December 31, are summarized as follows:

			2013			2012			2011
	Statutory rates			34	%		34	%		34	%
	Increase (decrease) resulting from:
	Tax exempt Income for federal purposes			-9.1	%		-9	%		-11.3	%
	State taxes on income, net of federal benefit			3.3	%		4.1	%		5	%
	Benefits from low income housing credits			-1	%		-0.9	%		-4.8	%
	Tax benefits related to an acquisition			—			-13.5	%		—
	True-up of prior year provision			-4.3	%		—			—
	Increase in the valuation reserve			-9.9	%		0.8	%		—
	Other, net			2.1	%		0.2	%		4.1	%
	Effective tax rate			15.1	%		15.7	%		27	%

	The tax effect of temporary differences giving rise to the Bank’s net deferred tax asset are as follows:

			December 31,
	(Dollar amounts in thousands)		2013			2012			2011

	Deferred tax assets
	Allowance for loan losses		$	4,449		$	4,081		$	4,378
	Accrued salaries and officers compensation			1,492			1,276			1,399
	Capitalized interest on buildings			11			14			—
	Expenses accrued on books, not yet deductible in tax return			1,480			2,065			2,039
	Depreciation			405			501			565
	Net operating loss carryforward			89			334			408
	Tax credit carryforwards			878			1,185			820
	Acquisition accounting differences			885			1,620			—
	Unrealized depreciation on available-for-sale securities			876			—			—
				10,565			11,076			9,609

	Deferred tax liabilities
	Unrealized appreciation on available-for-sale securities		$	—		$	2,698		$	2,283
	State income taxes			668			766			668
	Core deposit intangible			61			91			87
	Expenses and credits deducted on tax return, not on books			122			99			98
	Total deferred tax liabilities			851			3,654			3,136

	Net deferred tax asset before valuation allowance			9,714			7,422			6,473

	Valuation allowance			—			(934	)		(820	)

	Net deferred tax assets (included in other assets)		$	9,714		$	6,488			5,653

	As of December 31, 2013, management believes that it is more likely than not that the deferred tax assets will be realized through recovery of taxes previously paid and/or future taxable income. In assessing the Company’s ability to realize the tax benefits of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods which the deferred tax assets are deductible, management believes it is more likely than not that the Company will realize the recorded benefits of these deductible differences. The Bank has federal net operating loss carry-forwards resulting from the acquisition of Sequoia National Bank which expire on December 31, 2020, totaling $262,000 as of December 31, 2013. These losses are limited to approximately $469,000 per year under IRS regulations. All operating loss carry-forwards are expected to be utilized prior to their expiration.

Financial_Instruments

Financial Instruments	12 Months Ended
Financial Instruments	Dec. 31, 2013
Financial Instruments Disclosure [Abstract]	'
Financial Instruments	'
		-16	Financial Instruments



	The Bank is a party to financial instruments with off-balance-sheet risk in the normal course of business. These financial instruments include commitments to extend credit in the form of loans or through standby letters of credit. These instruments involve, to varying degrees, elements of credit and interest-rate risk in excess of the amount recognized in the balance sheet. The Bank’s exposure to credit loss is represented by the contractual amount of those instruments and is usually limited to amounts funded or drawn. The contract or notional amounts of these agreements, which are not included in the balance sheets, are an indicator of the Bank’s credit exposure. Commitments to extend credit generally carry variable interest rates and are subject to the same credit standards used in the lending process for on-balance-sheet instruments. Additionally, the Bank periodically reassesses the customer’s creditworthiness through ongoing credit reviews. The Bank generally requires collateral or other security to support commitments to extend credit. The following table provides summary information on financial instruments whose contract amounts represent credit risk as of December 31:



	(Dollars amounts in thousands)		31-Dec
			2013		2012
	Financial instruments whose contract amounts represent credit risk:
	Undisbursed loan commitments		$	52,398	$	32,529
	Lines of credit			65,120		62,616
	Mastercard/Visa lines			5,992		4,998
	Letters of credit			6,199		2,409
			$	129,709	$	102,552



	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer’s creditworthiness on a case-by-case basis, following normal lending policies. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on management’s credit evaluation. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial and residential properties. Equity reserves and unused credit card lines are additional commitments to extend credit. Many of these customers are not expected to draw down their total lines of credit, and therefore, the total contract amount of these lines does not necessarily represent future cash requirements. Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.



	The Bank issues both financial and performance standby letters of credit. The financial standby letters of credit are primarily to guarantee payment to third parties. As of December 31, 2013, there were financial standby letters of credit of $5,318,000 issued. The performance standby letters of credit are typically issued to municipalities as specific performance bonds. As of December 31, 2013 there were performance letters of credit of $881,000 issued. The terms of the guarantees will expire in 2014. The Bank has experienced no draws on these letters of credit, and does not expect to in the future. However, should a triggering event occur, the Bank either has collateral in excess of the letters of credit or embedded agreements of recourse from the customer.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
Fair Value Measurements	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
		-17	Fair Value Measurements



	The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2013 and 2012, and indicates the fair value techniques used by the Company to determine such fair value.



						Fair Value Measurements
	(Dollar amounts in thousands)					at December 31, 2013, Using
						Quoted Prices
						in Active
						Markets			Other			Significant
						for Identical			Observable			Unobservable
			Fair Value			Assets			Inputs			Inputs
	Description		12/31/13			(Level 1)			(Level 2)			(Level 3)
	U. S. Treasury securities		$	3,027		$	3,027		$	—		$	—
	Obligations of U.S. Government agencies			73,319			—			73,319			—
	Mortgage-backed securities			77,860			—			77,860			—
	Obligations of states and political subdivisions			82,676			—			82,676			—
	Corporate debt			27,106			—			27,106			—
	Total assets measured at fair value		$	263,988		$	3,027		$	260,961		$	—
						Fair Value Measurements
	(Dollar amounts in thousands)					at December 31, 2012, Using
						Quoted Prices
						in Active
						Markets			Other			Significant
						for Identical			Observable			Unobservable
			Fair Value			Assets			Inputs			Inputs
	Description		12/31/12			(Level 1)			(Level 2)			(Level 3)
	U. S. Treasury securities		$	7,280		$	7,280		$	—		$	—
	Obligations of U.S. Government agencies			72,260			—			72,260			—
	Mortgage-backed securities			55,180			—			55,180			—
	Obligations of states and political subdivisions			81,609			—			81,609			—
	Corporate debt			18,616			—			18,616			—
	Total assets measured at fair value		$	234,945		$	7,280		$	227,665		$	—



	Fair values established for available-for-sale investment securities are based on estimates of fair values quoted for similar types of securities with similar maturities, risk and yield characteristics. The following table presents the recorded amount of assets measured at fair value on a non-recurring basis:



						Fair Value Measurements
	(Dollar amounts in thousands)					at December 31, 2013, Using
						Quoted Prices in
						Active Markets			Other			Significant
						for Identical			Observable			Unobservable
			Fair Value			Assets			Inputs			Inputs
	Description		12/31/13			(Level 1)			(Level 2)			(Level 3)
	Impaired loans		$	4,810		$	—		$	—		$	4,810
	Other real estate owned			1,771			—			—			1,771
	Total impaired assets measured at fair value		$	6,581		$	—		$	—		$	6,581

						Fair Value Measurements
	(Dollar amounts in thousands)					at December 31, 2012, Using
						Quoted Prices in
						Active Markets			Other			Significant
						for Identical			Observable			Unobservable
			Fair Value			Assets			Inputs			Inputs
	Description		12/31/12			(Level 1)			(Level 2)			(Level 3)
	Impaired loans		$	2,494		$	—		$	—		$	2,494
	Other real estate owned			4,710			—			—			4,710
Total impaired assets measured at fair value		$	7,204		$	—		$	—		$	7,204


The following methods and assumptions were used by the Company in estimating the fair value disclosures for financial instruments that are not carried at fair value on either a recurring or non-recurring basis:



Cash and Cash Equivalents.



The carrying amounts reported in the balance sheet for cash and short-term instruments are a reasonable estimate of fair value, which will approximate their historical cost.



Securities Available-for-Sale.



Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments.



Federal Home Loan Bank and Federal Reserve Bank stock.



Federal Home Loan Bank and Federal Reserve Bank stock can only be issued and redeemed at par by these entities. These securities cannot be sold in open market transactions. Fair value is estimated to be their carrying value.



Loans Receivable.



For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. For fixed rate loans, fair values are based on discounted cash flows, credit risk factors, and liquidity factors.



Bank Owned Life Insurance.



The fair value of bank owned life insurance is the cash surrender value of the policies, net of expenses.



Deposit liabilities.



The fair values disclosed for demand deposits (e.g., interest and non-interest checking, savings, and money market accounts) are, by definition, equal to the amount payable on demand at reporting date (i.e., their carrying amounts). The fair values for fixed-rate certificates of deposit are based on discounted cash flows.



Undisbursed loan commitments, lines of credit, Mastercard line and standby letters of credit.



The fair value of these off-balance sheet items are based on discounted cash flows of expected fundings.



The following table provides summary information on the estimated fair value of financial instruments at December 31, 2013 and 2012:


31-Dec-13		Carrying			Fair			Fair value measurements
(Dollar amounts in thousands)		amount			value			Level 1			Level 2			Level 3
Financial assets:
Cash and cash equivalents		$	14,007		$	14,007		$	14,007
Interest-bearing time deposits with financial institutions		$	5,543		$	5,543					$	5,543
Securities available for sale		$	263,988		$	263,988		$	3,027		$	260,961
Loans		$	562,717		$	563,325								$	563,325
Other equity securities		$	5,300		$	5,300								$	5,300
Accrued interest receivable		$	3,808		$	3,808					$	3,808

Financial liabilities:
Deposits		$	773,615		$	774,012					$	774,012
Federal Home Loan Bank advances		$	15,000		$	15,000					$	15,000
Accrued interest payable		$	224		$	224					$	224

Off-balance-sheet liabilities:
Undisbursed loan commitments, lines of credit, standby letters of credit and Mastercard lines of credit			—		$	1,297								$	1,297

31-Dec-12		Carrying			Fair			Fair value measurements
(Dollar amounts in thousands)		amount			value			Level 1			Level 2			Level 3
Financial assets:
Cash and cash equivalents		$	27,861		$	27,861		$	27,861
Interest-bearing time deposits with financial institutions		$	13,216		$	13,216					$	13,216
Securities available for sale		$	234,945		$	234,945		$	7,280		$	227,665
Loans		$	550,917		$	547,740								$	547,740
Other equity securities		$	5,464		$	5,464								$	5,464
Accrued interest receivable		$	3,760		$	3,760					$	3,760

Financial liabilities:
Deposits		$	768,352		$	769,043					$	769,043
Federal Home Loan Bank advances		$	1,220		$	1,221					$	1,221
Accrued interest payable		$	349		$	349					$	349

Off-balance-sheet liabilities:
Undisbursed loan commitments, lines of credit, standby letters of credit and Mastercard lines of credit			—		$	1,026								$	1,026

Significant_Group_Concentratio

Significant Group Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2013
Concentration Risk Disclosure [Abstract]	'
Significant Group Concentrations of Credit Risk	'
		-18	Significant Group Concentrations of Credit Risk



	Most of the Bank’s business activity is with customers located within San Mateo and San Francisco counties. Generally, loans are secured by assets of the borrowers. Loans are expected to be repaid from cash flows or proceeds from the sale of selected assets of the borrowers. The Bank does not have significant concentrations of loans to any one industry, but does have loan concentrations in commercial real estate loans that are considered high by regulatory standards. The Bank has mitigated this concentration to a large extent by utilizing underwriting standards that are more conservative than regulatory guidelines, and performing stress testing on this segment of the portfolio to insure that the commercial real estate loan portfolio will perform within management expectations given an additional downturn in commercial lease rates and commercial real estate valuations. The distribution of commitments to extend credit approximates the distribution of loans outstanding. Commercial and standby letters of credit were granted primarily to commercial borrowers. The contractual amounts of credit-related financial instruments such as commitments to extend credit, credit-card arrangements, and letters of credit represent the amounts of potential accounting loss should the contract be fully drawn upon, the customer default, and the value of any existing collateral become worthless.

Regulatory_Matters

Regulatory Matters	12 Months Ended
Regulatory Matters	Dec. 31, 2013
Regulatory Matters Disclosure [Abstract]	'
Regulatory matters	'
		-19	Regulatory matters



	The Company, as a bank holding company, is subject to regulation by the Board of Governors of the Federal Reserve System under the Bank Holding Company Act of 1956, as amended. The Bank is subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements.



	Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s assets, liabilities and certain off balance-sheet items as calculated under regulatory accounting practices.



	The capital amounts and classification are also subject to qualitative judgments by the regulators about asset groupings, risk weightings and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2013, that the Company and the Bank have met all regulatory capital requirements.



	As of December 31, 2013, the most recent notification from the regulatory agencies categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized the Bank must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed the Bank’s categories.

	The consolidated actual capital amounts and ratios of the Company and the Bank are also presented in the following table:



	December 31, 2013:													To be well
								For capital						capitalized under
								adequacy						prompt corrective
	(Dollar amounts in thousands)		Actual					purposes						action provisions
			Amount		Ratio			Amount			Ratio			Amount			Ratio

	Total risk-based capital (to risk weighted assets)
	Consolidated Company		$	97,491		14.3	%	$	5,454,042	≥		8	%	$	68,164	≥		n/a
	Bank		$	96,247		14.12	%	$	52,883	≥		8	%	$	68,164	≥		10	%

	Tier 1 capital (to risk weighted assets)
	Consolidated Company		$	88,949		13.05	%	$	2,726,406	≥		4	%	$	40,920	≥		n/a
	Bank		$	87,705		12.86	%	$	26,358	≥		4	%	$	40,920	≥		6	%

	Tier 1 leverage capital (to total average assets)
	Consolidated Company		$	88,949		9.81	%	$	3,626,871	≥		4	%	$	45,349	≥		n/a
	Bank		$	87,705		9.67	%	$	3,627,921	≥		4	%	$	45,349	≥		5	%

	December 31, 2012:													To be well
								For capital						capitalized under
								adequacy						prompt corrective
	(Dollar amounts in thousands)		Actual					purposes						action provisions
			Amount		Ratio			Amount			Ratio			Amount			Ratio

	Total risk-based capital (to risk weighted assets)
	Consolidated Company		$	94,556		14.65	%	$	5,163,468	≥		8	%	$	64,537	≥		n/a
	Bank		$	93,966		14.56	%	$	51,630	≥		8	%	$	64,537	≥		10	%

	Tier 1 capital (to risk weighted assets)
	Consolidated Company		$	86,476		13.4	%	$	2,581,373	≥		4	%	$	38,716	≥		n/a
	Bank		$	85,886		13.31	%	$	25,811	≥		4	%	$	38,716	≥		6	%

	Tier 1 leverage capital (to total average assets)
	Consolidated Company		$	86,476		9.75	%	$	3,547,733	≥		4	%	$	44,363	≥		n/a
	Bank		$	85,886		9.68	%	$	3,549,008	≥		4	%	$	44,363	≥		5	%

Stock_Option_Plans

Stock Option Plans	12 Months Ended
Stock Option Plans	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Option Plans	'
		-20	Stock Option Plans



	In 1997, the Board of Directors of the Bank adopted the First National Bank of Northern California 1997 stock option plan. Pursuant to the holding company reorganization effective March 15, 2002, the Bank stock option plan became the FNB Bancorp stock option Plan. In 2002, the Company adopted an incentive employee stock option plan known as the 2002 FNB Bancorp plan. In 2008, the Company adopted an incentive employee stock option plan known as the 2008 FNB Bancorp stock option plan. The plans allow the Company as of December 31, 2013 to grant options to employees covering 133,657 shares.

	Incentive stock options currently outstanding become exercisable in one to five years from the grant date, based on a vesting schedule of 20% per year and expire 10 years after the grant date. Nonqualified options to directors become vested on the date of grant. The options exercise price is the fair value of the per share price of the underlying stock options at the grant date.



	The amount of compensation expense for options recorded in the years ended December 31, 2013, 2012, and 2011 was $328,000, $210,000, and $293,000, respectively. There was an income tax benefit related to stock option exercises for the years ended December 31, 2013 and 2012 of $354,000 and $30,000, respectively, but no tax benefit for 2011.



	The amount of total unrecognized compensation expense related to non-vested options at December 31, 2013 was $910,000, and the weighted average period it will be amortized over is 4.0 years. The assumptions for options granted in 2013 were as follows: dividend yield of 1.35% for the year; risk-free interest rate of 2.55%; expected volatility of 24.71%; expected life of 9.3 years. This resulted in a weighted average fair value of $7.81 per share. There were no options granted in 2012.



	A summary of option activity, adjusted for stock dividends, issued under the 2008 FNB Bancorp Plan as of December 31, 2013 and changes during the year then ended is presented below.



										Weighted-
										Average
	2008 FNB Bancorp Plan						Weighted			Remaining			Aggregate
							Average			Contractual			Intrinsic
							Exercise			Term			Value
	Options		Shares				Price			(in years)			0
	Outstanding at January 1, 2013			216,800			$	8.76
	Granted			136,704			$	22.86
	Exercised			(51,914	)		$	8.27					$	637
	Forfeited or expired			—				—
	Outstanding at December 31, 2013			301,590			$	15.23			7.7		$	3,851
	Exercisable at December 31, 2013			130,230			$	10.57			6.3		$	2,270

	The following supplemental information applies to the three years ended December 31:



	2008 FNB Bancorp Plan
			2013				2012			2011
	Options outstanding			301,590				216,800			232,019
	Range of exercise prices		$	6.14-$26.60			$	6.14-$11.83		$	6.14-$11.83
	Weighted average remaining contractual life			7.7				7			8
	Fully vested options			130,230				120,609			94,228
	Weighted average exercise price		$	10.57			$	8.18		$	7.93
	Aggregate intrinsic value		$	2,270,122			$	1,144,601		$	292,526
	Weighted average remaining contractual life (in years)			6.3				6.6			7.4



	A summary of option activity under the 2002 FNB Bancorp Plan as of December 31, 2012 and changes during the year then ended is presented below.



										Weighted-
										Average
	2002 FNB Bancorp Plan						Weighted			Remaining			Aggregate
							Average			Contractual			Intrinsic
							Exercise			Term			Value
	Options		Shares				Price			(in years)			0
	Outstanding at January 1, 2013			220,010			$	20.11
	Granted			—				—
Exercised			(52,630	)		$	15.87
Forfeited or expired			(2,653	)		$	14.62
Outstanding at December 31, 2013			164,727			$	21.56			1.9		$	1,061
Exercisable at December 31, 2013			164,727			$	21.56			1.9		$	1,061



The following supplemental information applies to the three years ended December 31:



2002 FNB Bancorp Plan
		2013				2012			2011
Options outstanding			164,727				220,010			257,454
Range of exercise prices		$	15.31-$24.54			$	14.62-$24.54		$	14.62-$24.54
Weighted average remaining contractual life			1.9				2.4			3
Fully vested options			164,727				220,010			252,079
Weighted average exercise price		$	21.56			$	20.11		$	19.36
Aggregate intrinsic value		$	1,061,071			$	132,051		$	0
Weighted average remaining contractual life (in years)			1.9				2.4			2.9



A summary of option activity under the 1997 FNB Bancorp Plan as of December 31, 2013 and changes during the year then ended is presented below.



									Weighted-
									Average
1997 First National Bank Plan						Weighted			Remaining			Aggregate
						Average			Contractual			Intrinsic
						Exercise			Term			Value
Options		Shares				Price			(in years)			0
Outstanding at January 1, 2013			30,112			$	21.68
Granted			—				—
Exercised			—				—
Forfeited or expired			—				—
Outstanding at December 31, 2013			30,112			$	21.68			3.5		$	190
Exercisable at December 31, 2013			30,112			$	21.68			3.5		$	190



The following supplemental information applies to the three years ended December 31:



1997 FNB Bancorp Plan
		2013				2012			2011
Options outstanding			30,112				30,112			30,112
Range of exercise prices		$	21.68-$21.68			$	21.68-$21.58		$	21.68-$21.58
Weighted average remaining contractual life			3.5				4.5			5.5
Fully vested options			30,112				30,112			24,087
Weighted average exercise price		$	21.68			$	21.68		$	21.68
Aggregate intrinsic value		$	190,437			$	0		$	0
Weighted average remaining contractual life (in years)			3.5				4.5			5.5

Quarterly_Data_Unaudited

Quarterly Data (Unaudited)	12 Months Ended
Quarterly Data (Unaudited)	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Data (Unaudited)	'
		-21	Quarterly Data (Unaudited)



			2013
	(Dollars in thousands)		First		Second		Third			Fourth

	Interest income		$	9,397	$	9,358	$	9,259		$	9,375
	Interest expense			682		639		560			514
	Net interest income			8,715		8,719		8,699			8,861
	Provision for loan losses			600		510		225			50
	Net interest income, after provision for loan losses			8,115		8,209		8,474			8,811

	Non-interest income			976		1,092		978			1,137
	Non-interest expense			7,739		7,385		6,950			6,954
	Income before income taxes			1,352		1,916		2,502			2,994
	Provision (benefit) for income taxes			422		537		(629	)		995
	Net earnings			930		1,379		3,131			1,999
	Dividends and discount accretion on preferred stock			158		172		118			119
	Net earnings available to common shareholders		$	772	$	1,207	$	3,013		$	1,880

	Basic earnings per share		$	0.2	$	0.31	$	0.76		$	0.47
	Diluted earnings per share		$	0.19	$	0.3	$	0.75		$	0.46

			2012
	(Dollars in thousands)		First		Second		Third			Fourth

	Interest income		$	7,882	$	7,878	$	8,361		$	9,467
	Interest expense			684		653		663			727
	Net interest income			7,198		7,225		7,698			8,740
	Provision for loan losses			400		400		400			633
	Net interest income, after provision for loan losses			6,798		6,825		7,298			8,107

	Non-interest income			1,920		1,415		4,764			1,060
	Non-interest expense			7,053		6,498		6,631			7,557
	Income before income taxes			1,665		1,742		5,431			1,610
	Provision for income taxes			377		514		490			264
	Net earnings			1,288		1,228		4,941			1,346
	Dividends and discount accretion on preferred stock			186		157		158			157
	Net earnings available to common shareholders		$	1,102	$	1,071	$	4,783		$	1,189

	Basic earnings per share		$	0.28	$	0.28	$	1.23		$	0.31
	Diluted earnings per share		$	0.28	$	0.27	$	1.21		$	0.3

Condensed_Financial_Informatio

Condensed Financial Information of Parent Company	12 Months Ended
Condensed Financial Information of Parent Company	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Financial Information of Parent Company	'
		-22	Condensed Financial Information of Parent Company



	The parent company-only condensed balance sheets, condensed statements of earnings, and condensed statements of cash flows information are presented as of and for the years ended December 31, as follows:



	FNB Bancorp		Condensed balance sheets
	(Dollars in thousands)		2013						2012
	Assets:
	Cash and due from banks		$	981					$	512
	Investments in subsidiary			93,005						94,768
	Income tax receivable from subsidiary			49						49
	Dividend receivable from subsidiary			398						296
	Other assets			242						50
	Total assets		$	94,675					$	95,675
	Liabilities:
	Dividend declared		$	398					$	296
	Other liabilities			28						21
	Total liabilities			426						317
	Stockholders’ equity			94,249						95,358
	Total liabilities and stockholders’ equity		$	94,675					$	95,675

	FNB Bancorp		Condensed statements of earnings
	(Dollars in thousands)		2013			2012			2011
	Income:
	Dividends from subsidiary		$	3,955		$	1,279		$	1,269
	Total income			3,955			1,279			1,269
	Expense:
	Other expense			111			85			64
	Total expense			111			85			64
	Income before income taxes and equity in undistributed earnings of subsidiary			3,844			1,194			1,205
	Income tax expense/(benefit)			—			(41	)		(2	)
	Income before equity in undistributed earnings of subsidiary			3,844			1,235			1,207
	Equity in undistributed earnings of subsidiary			3,595			7,568			3,050
	Net earnings			7,439			8,803			4,257
	Dividends and discount accretion on preferred stock			567			658			800
	Net earnings available to common shareholders		$	6,872		$	8,145		$	3,457

	FNB Bancorp		Condensed statement of cash flows
	(Dollars in thousands)		2013			2012			2011
	Net earnings		$	7,439		$	8,803		$	4,257
	Income tax (receivable from) subsidiary			—			(42	)		1
	Options expense (payable to) receivable from subsidiary			—			—			(215	)
	Net increase in other assets			(192	)		(31	)		—
	Net increase in other liabilities			404			11			—
	Undistributed earnings of subsidiary			(3,595	)		(7,568	)		(3,050	)
	Stock-based compensation expense			328			210			293
	Cash flows from operating activities			4,384			1,383			1,286
	Repayment of capital purchase program			(3,150	)		—			(12,600	)
	Small Business Lending Fund funds received			—			—			12,600
	Stock options exercised, including tax benefits of $191 in 2013, $30 in 2012, and none in 2011			1,258			181			11
	Dividends on common stock			(1,456	)		(968	)		(568	)
	Cash dividends on preferred stock series A, B, C			(567	)		(658	)		(545	)
	Cash flows provided by financing activities			(3,915	)		(1,445	)		(1,102	)
	Net (decrease) increase in cash			469			(62	)		184
	Cash, beginning of year			512			574			390
	Cash, end of year		$	981		$	512		$	574

Subsequent_Event

Subsequent Event	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Event	'
	-23	Subsequent Event

	On Thursday, January 23, 2014, FNB Bancorp (the “Company”) redeemed all the remaining outstanding preferred shares that had been issued to the United States Treasury Department through the Small Business Lending Fund (“SBLF”) in a cash redemption transaction. Subsequent to this redemption, the United States Treasury Department no longer has any equity interest in the Company of any kind.

The_Company_and_Summary_of_Sig1

The Company and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2013

Dividends Payable [Line Items]

Basis of Presentation

(a)

Basis of Presentation

Cash and Cash Equivalents

(b)

Cash and Cash Equivalents

Investment Securities

(c)

Investment Securities

Derivatives

(d)

Derivatives

Loans

(e)

Loans

Allowance for Loan Losses

(f)

Allowance for Loan Losses

Premises and Equipment

(g)

Premises and Equipment

Other Real Estate Owned

(h)

Other Real Estate Owned

Goodwill and Other Intangible Assets

(i)

Goodwill and Other Intangible Assets

Other Income

(l)

Other Income

Other income includes the following major items:

2013

2012

2011

Dividend income-other equity securities

262

138

Rental Income-other real estate owned

249

All other smaller items

352

240

293

Total other income

863

426

467

Other Expense

(m)

Other Expense

Other expense includes the following major items:

2013

2012

2011

dues and memberships

109,000

111,000

104,000

real estate appraisals

129,000

72,000

83,000

Training and seminars

86,000

82,000

79,000

Amortization of deposit premium

68,000

100,000

98,000

Mastercard

98,000

97,000

100,000

Dunbar courier

113,000

107,000

104,000

OCC Assessment

215,000

171,000

261,000

All other smaller items

425,000

734,000

458,000

Total other expense

1,243,000

1,474,000

1,287,000

Income Taxes

(n)

Income Taxes

Earnings per Share

(o)

Earnings per Share

(Number of shares in thousands)

2013

2012

2011

Weighted average common shares outstanding-used in computing basic earnings per share

3,935

3,879

3,873

Dilutive effect of stock options outstanding, using the treasury stock method

Shares used in computing diluted earnings per share

4,024

3,943

3,893

Stock Option Plans

(p)

Stock Option Plans

Fair Values of Financial Instruments

(q)

Fair Values of Financial Instruments

Bank Owned Life Insurance

(r)

Bank Owned Life Insurance

Federal Home Loan Bank Borrowings

(s)

Federal Home Loan Bank Borrowings

Reclassifications

(t)

Reclassifications

Certain prior year information has been reclassified to conform to current year presentation. The reclassifications had no impact on consolidated net earnings or retained earnings.

Recent Accounting Pronouncements

(u)

Recent Accounting Pronouncements

Management has reviewed the remaining Accounting Standards Updates (ASU; 2013-03 through 2013-10) and concluded that none are applicable to the Company’s current operations.

Cash Dividends

Dividends Payable [Line Items]

Cash Dividends and Stock Dividend

(j)

Cash Dividends

Stock Dividends

Dividends Payable [Line Items]

Cash Dividends and Stock Dividend

(k)

Stock Dividend

The_Company_and_Summary_of_Sig2

The Company and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Schedule of other income	'
		2013		2012		2011
	Dividend income-other equity securities		262		138		77
	Rental Income-other real estate owned		249		48		97
	All other smaller items		352		240		293
	Total other income		863		426		467
Schedule of other expense	'
		2013		2012		2011
	dues and memberships		109,000		111,000		104,000
	real estate appraisals		129,000		72,000		83,000
	Training and seminars		86,000		82,000		79,000
	Amortization of deposit premium		68,000		100,000		98,000
	Mastercard		98,000		97,000		100,000
	Dunbar courier		113,000		107,000		104,000
	OCC Assessment		215,000		171,000		261,000
	All other smaller items		425,000		734,000		458,000
	Total other expense		1,243,000		1,474,000		1,287,000
Schedule of reconciliation of weighted average shares used in computing basic and diluted earnings per share	'
	(Number of shares in thousands)	2013		2012		2011
	Weighted average common shares outstanding-used in computing basic earnings per share		3,935		3,879		3,873
	Dilutive effect of stock options outstanding, using the treasury stock method		89		64		20
	Shares used in computing diluted earnings per share		4,024		3,943		3,893

Oceanic_Bank_Acquisition_Table

Oceanic Bank Acquisition (Tables)	12 Months Ended
Oceanic Bank Acquisition (Tables)	Dec. 31, 2013
Business Combinations [Abstract]	'
Schedule of fair value of assets acquired and liabilities assumed	'
		September 21,
	(Dollars in thousands)	2012
	Assets acquired:

	Cash and due from banks	$	(1,278	)
	Investment securities, available for sale		13,387
	Loans		103,194
	Premises and equipment, net		12
	Core deposit intangible		110
	Other assets		2,504
	Total assets acquired	$	117,929

	Liabilities assumed:

	Noninterest-bearing deposits		11,755
	Interest-bearing deposits		95,914
	Borrowings		6,097
	Accrued expenses and other liabilities		497
	Total liabilities assumed	$	114,263

	Net assets acquired/Bargain purchase gain	$	3,666

Securities_AvailableforSale_Ta

Securities Available-for-Sale (Tables)	12 Months Ended
Securities Available-for-Sale (Tables)	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Schedule of amortized cost and carrying values of securities available-for-sale	'
	(Dollar amounts in thousands)	Amortized		Unrealized			Unrealized			Carrying
		cost		gains			losses			value
	December 31, 2013:
	U.S. Treasury securities	$	3,069	$	12		$	(54	)	$	3,027
	Obligations of U.S. government agencies		73,691		488			(860	)		73,319
	Mortgage-backed securities		79,873		360			(2,373	)		77,860
	Obligations of states and political subdivisions		82,526		1,467			(1,317	)		82,676
	Corporate debt		26,958		330			(182	)		27,106
		$	266,117	$	2,657		$	(4,786	)	$	263,988

	December 31, 2012:
	U.S. Treasury securities	$	7,145	$	135		$	—		$	7,280
	Obligations of U.S. government agencies		71,061		1,206			(7	)		72,260
	Mortgage-backed securities		53,934		1,383			(137	)		55,180
	Obligations of states and political subdivisions		78,147		3,515			(53	)		81,609
	Corporate debt		18,103		535			(22	)		18,616
		$	228,390	$	6,774		$	(219	)	$	234,945
Schedule of analysis of gross unrealized losses within available-for-sale investment securities portfolio	'
		Total		< 12 Months			Total			12 Months or >			Total		Total
	December 31, 2013:	Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	(Dollar amounts in thousands)	Value		Losses			Value			Losses			Value		Losses
	U. S. Treasury securities		2,002		(54	)		—			—			2,002		(54	)
	Obligations of U.S. government agencies		40,108		(860	)		—			—			40,108		(860	)
	Mortgage-backed securities		51,419		(2,015	)		5,664			(358	)		57,083		(2,373	)
	Obligations of states and political subdivisions		33,265		(1,248	)		1,083			(69	)		34,348		(1,317	)
	Corporate debt		10,857		(180	)		498			(2	)		11,355		(182	)
	Total	$	137,651	$	(4,357	)	$	7,245		$	(429	)	$	144,896	$	(4,786	)

		Total		< 12 Months			Total			12 Months or >			Total		Total
	December 31, 2012:	Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	(Dollar amounts in thousands)	Value		Losses			Value			Losses			Value		Losses
	Obligations of U.S. government agencies		4,093		(7	)		—			—			4,093		(7	)
	Mortgage-backed securities		8,580		(137	)		—			—			8,580		(137	)
	Obligations of states and political subdivisions		8,492		(53	)		—			—			8,492		(53	)
	Corporate debt		—		—			478			(22	)		478		(22	)
	Total	$	21,165	$	(197	)	$	478		$	(22	)	$	21,643	$	(219	)
Schedule of available-for-sale securities, debt maturities, basis of allocation	'
	(Dollar amounts in thousands)	Amortized		Carrying
		Cost		Value
	Available-for-sale:
	Due in one year or less	$	14,443	$	14,569
	Due after one through five years		96,703		97,184
	Due after five years through ten years		116,484		114,537
	Due after ten years		38,487		37,698
		$	266,117	$	263,988

Loans_Tables

Loans (Tables)	12 Months Ended
Loans (Tables)	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of summary of loans	'
															Total
			FNB												Balance
			Bancorp												31-Dec
	(Dollar amounts in thousands)		Originated				PNCI				PCI				2013
	Commercial real estate		$	285,938			$	37,936			$	1,325			$	325,199
	Real estate construction			31,290				3,028				—				34,318
	Real estate multi-family			34,357				11,786				—				46,143
	Real estate 1 to 4 family			98,196				8,707				—				106,903
	Commercial & industrial			38,287				10,217				—				48,504
	Consumer loans			1,650				—				—				1,650
	Gross loans			489,718				71,674				1,325				562,717
	Net deferred loan fees			(495	)			—				—				(495	)
	Allowance for loan losses			(9,869	)			(10	)			—				(9,879	)
	Net loans		$	479,354			$	71,664			$	1,325			$	552,343

															Total
			FNB												Balance
			Bancorp												31-Dec
	(Dollar amounts in thousands)		Originated				PNCI				PCI				2012
	Commercial real estate		$	254,449			$	48,009			$	1,402			$	303,860
	Real estate construction			14,866				3,594				486				18,946
	Real estate multi-family			39,176				18,828				—				58,004
	Real estate 1 to 4 family			97,329				15,390				—				112,719
	Commercial & industrial			42,847				12,717				—				55,564
	Consumer loans			1,824				—				—				1,824
	Gross loans			450,491				98,538				1,888				550,917
	Net deferred loan fees			(230	)			—				—				(230	)
	Allowance for loan losses			(9,124	)			—				—				(9,124	)
	Net loans		$	441,137			$	98,538			$	1,888			$	541,563
Schedule of summary of changes in allowance for loan losses	'
			Allowance for Loan Losses
			As of and For the Year Ended December 31, 2013
	(Dollar amounts in thousands)
															Real				Real
															Estate				Estate
			Commercial				Commercial				Real Estate				Multi				1 to
			& industrial				Real estate				Construction				family				4 family				Consumer				Total
	Allowance for credit losses

	Beginning balance		$	1,875			$	4,812			$	857			$	—			$	1,516			$	64			$	9,124
	Charge-offs			(57	)			(262	)			(81	)			—				(385	)			(7	)			(792	)
	Recoveries			73				35				50				—				3				1				162
	Provision			(654	)			1,178				(92	)			293				654				6				1,385
	Ending balance		$	1,237			$	5,763			$	734			$	293			$	1,788			$	64			$	9,879

	Ending balance: individually evaluated for impairment		$	176			$	165			$	—			$	—			$	254			$	—			$	595
	Ending balance: collectively evaluated for impairment		$	1,061			$	5,598			$	734			$	293			$	1,534			$	64			$	9,284

															Real				Real
															Estate				Estate
			Commercial				Commercial				Real Estate				Multi				1 to
			& industrial				Real Estate				Construction				family				4 family				Consumer				Total

	Loans:
	Ending balance		$	48,504			$	323,874			$	34,318			$	46,143			$	106,903			$	1,650			$	561,392

	Ending balance: individually evaluated for impairment		$	2,497			$	17,974			$	189			$	375			$	4,077			$	—			$	25,112
	Ending balance: collectively evaluated for impairment		$	46,007			$	305,900			$	34,129			$	46,143			$	102,826			$	1,650			$	536,655


			Allowance for Loan Losses
			As of and For the Year Ended December 31, 2012
	(Dollar amounts in thousands)
															Real				Real
															Estate				Estate
			Commercial				Commercial				Real Estate				Multi				1 to
			& industrial				Real estate				Construction				family				4 family				Consumer				Total
	Allowance for credit losses

	Beginning balance		$	1,618			$	4,745			$	1,171			$	671			$	1,592			$	100			$	9,897
	Charge-offs			(1,706	)			(738	)			(54	)			(242	)			(182	)			(11	)			(2,933	)
	Recoveries			124				171				—				—				11				21				327
	Provision			1,839				634				(260	)			(429	)			95				(46	)			1,833
	Ending balance		$	1,875			$	4,812			$	857			$	—			$	1,516			$	64			$	9,124

	Ending balance: individually evaluated for impairment		$	384			$	415			$	232			$	—			$	306			$	—			$	1,337
	Ending balance: collectively evaluated for impairment		$	1,491			$	4,397			$	625			$	—			$	1,210			$	64			$	7,787

	Loans:
	Ending balance		$	55,564			$	302,458			$	18,460			$	58,004			$	112,719			$	1,824			$	549,029
	Ending balance: individually evaluated for impairment		$	4,167			$	16,099			$	681			$	—			$	4,771			$	—			$	25,718
	Ending balance: collectively evaluated for impairment		$	51,397			$	286,359			$	18,460			$	58,004			$	107,948			$	1,824			$	523,992
Schedule of summary of impaired loans	'
			As of and for the year ended December 31, 2013

							Unpaid								Average
	(Dollar amounts in thousands)		Recorded				Principal				Related				Recorded				Income
			Investment				Balance				Allowance				Investment				Recognized

	With no related allowance recorded
	Commercial and industrial		$	1,059			$	1,232			$	—			$	1,204			$	66
	Commercial real estate construction			—				—				—				—				—
	Commercial real estate			12,397				13,535				—				11,445				565
	Real estate multi family			375				375				—				384				25
	Residential- 1 to 4 family			1,163				1,284				—				1,009				37
	Total			14,994				16,426				—				14,042				693

	With an allowance recorded
	Commercial and industrial		$	1,438			$	1,871			$	166			$	1,710			$	15
	Commercial real estate construction			189				196				10				198				18
	Commercial real estate			5,577				5,588				165				4,972				254
	Residential- 1 to 4 family			2,914				2,923				254				2,989				115
	Total			10,118				10,578				595				9,869				402

	Total
	Commercial and industrial		$	2,497			$	3,103			$	166			$	2,914			$	81
	Commercial real estate construction			189				196				10				198				18
	Commercial real estate			17,974				19,123				165				16,417				819
	Real estate multi family			375				375				—				384				25
	Residential - 1 to 4 family			4,077				4,207				254				3,998				152
	Grand total		$	25,112			$	27,004			$	595			$	23,911			$	1,095

			As of and for the year ended December 31, 2012

							Unpaid								Average
	(Dollar amounts in thousands)		Recorded				Principal				Related				Recorded				Income
			Investment				Balance				Allowance				Investment				Recognized

	With no related allowance recorded
	Commercial and industrial		$	2,202			$	2,338			$	—			$	2,298			$	120
	Commercial real estate construction			—				—				—				6,187				333
	Commercial real estate			10,666				11,580				—				4,874				86
	Residential- 1 to 4 family			1,052				1,147				—				1,065				55
	Total			13,920				15,065				—				14,424				594

	With an allowance recorded
	Commercial and industrial		$	1,965			$	2,427			$	384			$	2,328			$	30
	Commercial real estate construction			681				798				232				798				4
	Commercial real estate			5,433				5,433				415				5,685				240
	Residential- 1 to 4 family			3,719				3,722				306				3,283				150
	Total			11,798				12,380				1,337				12,094				424

	Total
	Commercial and industrial		$	4,167			$	4,765			$	384			$	4,626			$	150
	Commercial real estate construction			681				798				232				6,985				337
	Commercial real estate			16,099				17,013				415				10,559				326
	Residential - 1 to 4 family			4,771				4,869				306				4,348				205
	Grand total		$	25,718			$	27,445			$	1,337			$	26,518			$	1,018
Schedule of contractual provisions of non-accrual loans	'
			Loans on Nonaccrual Status as of
	(Dollar amounts in thousands)		December 31,				December 31,
			2013				2012
	Commercial & industrial		$	2,046			$	2,618
	Real estate - construction			189				1,898
	Commercial real estate			4,290				6,251
	Real estate 1 to 4 family			826				1,707
	Total		$	7,351			$	12,474

Schedule of summary of number and principal amounts outstanding for troubled debt restructurings	'
			Modifications
			For the Year Ended December 31, 2013
							Pre-				Post-
							Modification				Modification
							Outstanding				Outstanding
			Number of				Recorded				Recorded
			Contracts				Investment				Investment
	(Dollar amounts in thousands)
	Real Estate-construction			1			$	189			$	189
	Real estate 1 to 4 family			3				1,236				1,236
	Commercial real estate			6				4,566				4,566
	Total			10			$	5,991			$	5,991

			Modifications
			For the Year Ended December 31, 2012
							Pre-				Post-
							Modification				Modification
							Outstanding				Outstanding
			Number of				Recorded				Recorded
			Contracts				Investment				Investment
	(Dollar amounts in thousands)
	Commercial & industrial			7			$	2,723			$	2,723
	Real estate 1 to 4 family			3				1,446				1,446
	Commercial real estate			3				1,409				1,409
	Total			13			$	5,578			$	5,578
Schedule of summary of number and principal amounts outstanding for troubled debt restructurings	'
			Total troubled debt restructurings outstanding at year end
	(dollars in thousands)		31-Dec-13												31-Dec-12
							Non-												Non-
			Accrual				accrual				Total				Accrual				accrual				Total
			status				status				modifications				status				status				modifications

	Commercial & industrial		$	461			$	1,951			$	2,412			$	1,216			$	2,308			$	3,524
	Real Estate construction			—				189				189				—				—				—
	Real estate 1 to 4 family			2,121				529				2,650				333				1,113				1,446
	Commercial real estate			6,315				2,140				8,455				2,614				1,981				4,595
	Total		$	8,897			$	4,809			$	13,706			$	4,163			$	5,402			$	9,565
Schedule of age analysis of past due loans	'
			Age Analysis of Past Due Loans
			As of December 31, 2013
	(Dollar amounts in thousands)
			30-59				60-89																				Recorded
			Days				Days				Over				Total												Investment >
			Past				Past				90				Past								Total				90 Days and
	Originated		Due				Due				Days				Due				Current				Loans				Accruing
	Commercial real estate		$	1,403			$	—			$	2,349			$	3,752			$	282,186			$	285,938				—
	Real estate construction			—				—				—				—				31,290				31,290				—
	Real estate multi family			—				—				—				—				34,357				34,357
	Real estate 1 to 4 family			161				75				826				1,062				97,134				98,196				—
	Commercial & industrial			563				210				2,046				2,819				35,468				38,287
	Consumer			116				19				—				135				1,515				1,650				—
	Total		$	2,243			$	304			$	5,221			$	7,768			$	481,950			$	489,718			$	—

	Purchased
	Not credit impaired
	Commercial real estate		$	—			$	—			$	616			$	616			$	37,320			$	37,936
	Real estate construction			—				—				189				189				2,839				3,028
	Real estate multi-family			—				—				—				—				11,786				11,786
	Real estate 1 to 4 family			—				—				—				—				8,707				8,707
	Commercial & industrial			—				—				—				—				10,217				10,217
	Total		$	—			$	—			$	805			$	805			$	70,869			$	71,674

	Purchased
	Credit impaired
	Commercial real estate		$	—			$	—			$	1,325			$	1,325			$	—			$	1,325
	Real estate construction			—				—				—				—				—				—
	Real estate multi-family			—				—				—				—				—				—
	Real estate 1 to 4 family			—				—				—				—				—				—
	Commercial & industrial			—				—				—				—				—				—
	Total		$	—			$	—			$	1,325			$	1,325			$	—			$	1,325

			Age Analysis of Past Due Loans
			As of December 31, 2012
	(Dollar amounts in thousands)
			30-59				60-89																				Recorded
			Days				Days				Over				Total												Investment >
			Past				Past				90				Past								Total				90 Days and
	Originated		Due				Due				Days				Due				Current				Loans				Accruing
	Commercial real estate		$	3,942				—				2,525				6,467				247,982				254,449				—
	Real estate construction			—				—				—				—				14,866				14,866				—
	Real estate multi family			—				—				—				—				39,176				39,176				—
	Real estate 1 to 4 family			806				168				1,210				2,184				95,145				97,329				—
	Commercial & industrial			18				44				2,619				2,681				40,166				42,847				—
	Consumer			—				—				—				—				1,824				1,824				—
	Total		$	4,766			$	212			$	6,354			$	11,332			$	439,159			$	450,491			$	—

																											Recorded
																											Investment >
	Purchased																										90 Days and
	Not credit impaired																										Accruing
	Commercial real estate		$	690			$	—			$	2,212			$	2,902			$	45,107			$	48,009				—
	Real estate construction			—				—				1,411				1,411				2,183				3,594				—
	Real estate multi-family			75				—				—				75				18,753				18,828				—
	Real estate 1 to 4 family			—				119				—				119				15,271				15,390				—
	Commercial & industrial			50				—				—				50				12,667				12,717				—
	Total		$	815			$	119			$	3,623			$	4,557			$	93,981			$	98,538			$	—

																											Recorded
																											Investment >
	Purchased																										90 Days and
	Credit impaired																										Accruing
Commercial real estate		$	—			$	—			$	1402			$	1402			$	—			$	1,402				—
Real estate construction			—				—				486				486				—				486				—
Total		$	—			$	—			$	1,888			$	1,888			$	—			$	1,888			$	—
Schedule of financing receivable credit quality indicators	'
			Credit Quality Indicators
			As of December 31, 2013

	(Dollar amounts in thousands)
							Special				Sub-								Total
	Originated		Pass				mention				standard				Doubtful				loans
	Commercial real estate		$	280,356			$	2,330			$	3,252			$	—			$	285,938
	Real estate construction			29,673				573				1,044				—				31,290
	Real estate multi-family			34,357				—				—				—				34,357
	Real estate 1 to 4 family			97,514				—				429				253				98,196
	Commercial & industrial			36,837				—				1,439				11				38,287
	Consumer loans			1,631				—				19				—				1,650
	Totals		$	480,368			$	2,903			$	6,183			$	264			$	489,718

	Purchased
	Not credit impaired
	Commercial real estate		$	28,342			$	4,951			$	4,643			$	—			$	37,936
	Real estate construction			1,520				—				1,508				—				3,028
	Real estate multi-family			11,786				—				—				—				11,786
	Real estate 1 to 4 family			8,299				—				408				—				8,707
	Commercial & industrial			10,217				—				—				—				10,217
	Total		$	60,164			$	4,951			$	6,559			$	—			$	71,674

	Purchased
	Credit impaired
	Commercial real estate																		$	1,325
	Total																		$	1,325

			Credit Quality Indicators
			As of December 31, 2012

	(Dollar amounts in thousands)
							Special				Sub-								Total
	Originated		Pass				mention				standard				Doubtful				loans
	Commercial real estate		$	249,991			$	2,372			$	2,086			$	—			$	254,449
	Real estate construction			13,266				—				1,600				—				14,866
	Real estate multi-family			39,176				—				—				—				39,176
	Real estate 1 to 4 family			95,579				—				1,470				280				97,329
	Commercial & industrial			39,446				—				2,564				837				42,847
	Consumer loans			1,824				—				—				—				1,824
	Totals		$	439,282			$	2,372			$	7,720			$	1,117			$	450,491

	Purchased
	Not credit impaired
	Commercial real estate		$	30,600			$	7,902			$	9,507			$	—			$	48,009
	Real estate construction			—				39				3,555				—				3,594
	Real estate multi-family			18,828				—				—				—				18,828
	Real estate 1 to 4 family			14,850				—				540				—				15,390
	Commercial & industrial			12,717				—				—				—				12,717
	Total		$	76,995			$	7,941			$	13,602			$	—			$	98,538

	Purchased
	Credit impaired
	Commercial real estate																		$	1,402
	Real estate construction																			486
	Total																		$	1,888

Foreclosed_Assets_Tables

Foreclosed Assets (Tables)	12 Months Ended
Foreclosed Assets (Tables)	Dec. 31, 2013
Finance Loan And Lease Receivables Held For Investments Foreclosed Assets [Abstract]	'
Schedule of activity of foreclosed assets	'
		Year ended December 31,
	(Dollar amounts in thousands)	2013			2012			2011
	Beginning balance, net	$	6,650		$	2,747		$	6,680
	Additions/transfers from loans		25			4,894			622
	Disposition/sales		(1,288	)		(932	)		(4,012	)
	Valuation adjustments		(69	)		(59	)		(543	)
	Ending balance, net	$	5,318		$	6,650		$	2,747
	Ending valuation allowance	$	(122	)	$	(1,965	)	$	(2,041	)
	Ending number of foreclosed assets		4			5			4
	Proceeds from sale of foreclosed assets	$	1,288		$	932		$	4,078
	Gain on sale of foreclosed assets	$	96		$	6		$	66

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
Related Party Transactions (Tables)	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Schedule of activities of loans	'
	(Dollar amounts in thousands)	2013			2012
	Balance, beginning of year	$	10,225		$	21,573
	Additions		6,990			6,358
	Repayments		(6,133	)		(17,706	)
	Balance, end of year	$	11,082		$	10,225

		2013			2012
	Related party deposits	$	3,491		$	2,682

Bank_Premises_Equipment_and_Le1

Bank Premises, Equipment, and Leasehold Improvements (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Schedule of bank premises, equipment and leasehold improvements	'
	(Dollar amounts in thousands)	2013			2012
	Buildings	$	10,460		$	10,453
	Equipment & furniture		8,722			9,543
	Leasehold improvements		1,714			1,519
			20,896			21,515
	Accumulated depreciation and amortization		(13,712	)		(14,137	)
			7,184			7,378
	Land		5,328			5,328
		$	12,512		$	12,706

Deposits_Tables

Deposits (Tables)	12 Months Ended
Deposits (Tables)	Dec. 31, 2013
Debt Disclosure Text Block [Abstract]	'
Schedule of maturities of all time certificates of deposit	'
	Year ending December 31:
	(Dollar amounts in thousands)
	2014	$	96,881
	2015		12,946
	2016		10,745
	2017		3,462
	2018		118
		$	124,152

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of minimum rental commitments under operating leases	'
	Year ending December 31:
	(Dollars in thousands)
	2014	$	971
	2015		990
	2016		1,010
	2017		1,021
	2018		556
	Thereafter		1,510
		$	6,058

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Schedule of provision (benefit) for income taxes	'
	(Dollar amounts in thousands)	2013			2012			2011
	Current:
	Federal	$	697		$	467		$	1,201
	State		287			1,449			675
		$	984		$	1,916		$	1,876

	Deferred:
	Federal	$	197		$	420		$	(75	)
	State		144			(691	)		(233	)
			341			(271	)		(308	)
	Total provision for taxes	$	1,325		$	1,645		$	1,568
Schedule of differences between statutory federal income tax rate and effective tax rates	'
		2013			2012			2011
	Statutory rates		34	%		34	%		34	%
	Increase (decrease) resulting from:
	Tax exempt Income for federal purposes		-9.1	%		-9	%		-11.3	%
	State taxes on income, net of federal benefit		3.3	%		4.1	%		5	%
	Benefits from low income housing credits		-1	%		-0.9	%		-4.8	%
	Tax benefits related to an acquisition		—			-13.5	%		—
	True-up of prior year provision		-4.3	%		—			—
	Increase in the valuation reserve		-9.9	%		0.8	%		—
	Other, net		2.1	%		0.2	%		4.1	%
	Effective tax rate		15.1	%		15.7	%		27	%
Schedule of bank's net deferred tax asset	'
		December 31,
	(Dollar amounts in thousands)	2013			2012			2011

	Deferred tax assets
	Allowance for loan losses	$	4,449		$	4,081		$	4,378
	Accrued salaries and officers compensation		1,492			1,276			1,399
	Capitalized interest on buildings		11			14			—
	Expenses accrued on books, not yet deductible in tax return		1,480			2,065			2,039
	Depreciation		405			501			565
	Net operating loss carryforward		89			334			408
	Tax credit carryforwards		878			1,185			820
	Acquisition accounting differences		885			1,620			—
	Unrealized depreciation on available-for-sale securities		876			—			—
			10,565			11,076			9,609

	Deferred tax liabilities
	Unrealized appreciation on available-for-sale securities	$	—		$	2,698		$	2,283
	State income taxes		668			766			668
	Core deposit intangible		61			91			87
	Expenses and credits deducted on tax return, not on books		122			99			98
	Total deferred tax liabilities		851			3,654			3,136

	Net deferred tax asset before valuation allowance		9,714			7,422			6,473

	Valuation allowance		—			(934	)		(820	)

	Net deferred tax assets (included in other assets)	$	9,714		$	6,488			5,653

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
Financial Instruments (Tables)	Dec. 31, 2013
Financial Instruments Disclosure [Abstract]	'
Schedule of financial instruments with credit risk	'
	(Dollars amounts in thousands)	31-Dec
		2013		2012
	Financial instruments whose contract amounts represent credit risk:
	Undisbursed loan commitments	$	52,398	$	32,529
	Lines of credit		65,120		62,616
	Mastercard/Visa lines		5,992		4,998
	Letters of credit		6,199		2,409
		$	129,709	$	102,552

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
Fair Value Measurements (Tables)	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities measured at fair value on a recurring basis	'
				Fair Value Measurements
	(Dollar amounts in thousands)			at December 31, 2013, Using
				Quoted Prices
				in Active
				Markets		Other		Significant
				for Identical		Observable		Unobservable
		Fair Value		Assets		Inputs		Inputs
	Description	12/31/13		(Level 1)		(Level 2)		(Level 3)
	U. S. Treasury securities	$	3,027	$	3,027	$	—	$	—
	Obligations of U.S. Government agencies		73,319		—		73,319		—
	Mortgage-backed securities		77,860		—		77,860		—
	Obligations of states and political subdivisions		82,676		—		82,676		—
	Corporate debt		27,106		—		27,106		—
	Total assets measured at fair value	$	263,988	$	3,027	$	260,961	$	—
				Fair Value Measurements


	(Dollar amounts in thousands)			at December 31, 2012, Using
				Quoted Prices
				in Active
				Markets		Other		Significant
				for Identical		Observable		Unobservable
		Fair Value		Assets		Inputs		Inputs
	Description	12/31/12		(Level 1)		(Level 2)		(Level 3)
	U. S. Treasury securities	$	7,280	$	7,280	$	—	$	—
	Obligations of U.S. Government agencies		72,260		—		72,260		—
	Mortgage-backed securities		55,180		—		55,180		—
	Obligations of states and political subdivisions		81,609		—		81,609		—
	Corporate debt		18,616		—		18,616		—
	Total assets measured at fair value	$	234,945	$	7,280	$	227,665	$	—
Schedule of assets measured at fair value on a non-recurring basis	'
				Fair Value Measurements
	(Dollar amounts in thousands)			at December 31, 2013, Using
				Quoted Prices in
				Active Markets		Other		Significant
				for Identical		Observable		Unobservable
		Fair Value		Assets		Inputs		Inputs
	Description	12/31/13		(Level 1)		(Level 2)		(Level 3)
	Impaired loans	$	4,810	$	—	$	—	$	4,810
	Other real estate owned		1,771		—		—		1,771
	Total impaired assets measured at fair value	$	6,581	$	—	$	—	$	6,581

				Fair Value Measurements
	(Dollar amounts in thousands)			at December 31, 2012, Using
				Quoted Prices in
				Active Markets		Other		Significant
				for Identical		Observable		Unobservable
		Fair Value		Assets		Inputs		Inputs
	Description	12/31/12		(Level 1)		(Level 2)		(Level 3)
	Impaired loans	$	2,494	$	—	$	—	$	2,494
	Other real estate owned		4,710		—		—		4,710
	Total impaired assets measured at fair value	$	7,204	$	—	$	—	$	7,204
Schedule of summary information on estimated fair value of financial instruments	'
	31-Dec-13	Carrying		Fair		Fair value measurements
	(Dollar amounts in thousands)	amount		value		Level 1		Level 2		Level 3
	Financial assets:
	Cash and cash equivalents	$	14,007	$	14,007	$	14,007
	Interest-bearing time deposits with financial institutions	$	5,543	$	5,543			$	5,543
	Securities available for sale	$	263,988	$	263,988	$	3,027	$	260,961
	Loans	$	562,717	$	563,325					$	563,325
	Other equity securities	$	5,300	$	5,300					$	5,300
	Accrued interest receivable	$	3,808	$	3,808			$	3,808

	Financial liabilities:
	Deposits	$	773,615	$	774,012			$	774,012
	Federal Home Loan Bank advances	$	15,000	$	15,000			$	15,000
	Accrued interest payable	$	224	$	224			$	224

	Off-balance-sheet liabilities:
	Undisbursed loan commitments, lines of credit, standby letters of credit and Mastercard lines of credit		—	$	1,297					$	1,297

	31-Dec-12	Carrying		Fair		Fair value measurements
	(Dollar amounts in thousands)	amount		value		Level 1		Level 2		Level 3
	Financial assets:
	Cash and cash equivalents	$	27,861	$	27,861	$	27,861
	Interest-bearing time deposits with financial institutions	$	13,216	$	13,216			$	13,216
	Securities available for sale	$	234,945	$	234,945	$	7,280	$	227,665
	Loans	$	550,917	$	547,740					$	547,740
	Other equity securities	$	5,464	$	5,464					$	5,464
	Accrued interest receivable	$	3,760	$	3,760			$	3,760

	Financial liabilities:
	Deposits	$	768,352	$	769,043			$	769,043
	Federal Home Loan Bank advances	$	1,220	$	1,221			$	1,221
	Accrued interest payable	$	349	$	349			$	349

	Off-balance-sheet liabilities:
	Undisbursed loan commitments, lines of credit, standby letters of credit and Mastercard lines of credit		—	$	1,026					$	1,026

Regulatory_Matters_Tables

Regulatory Matters (Tables)	12 Months Ended
Regulatory Matters (Tables)	Dec. 31, 2013
Regulatory Matters Disclosure [Abstract]	'
Schedule of consolidated actual capital amounts and ratios	'
	December 31, 2013:												To be well
							For capital						capitalized under
							adequacy						prompt corrective
	(Dollar amounts in thousands)	Actual					purposes						action provisions
		Amount		Ratio			Amount			Ratio			Amount			Ratio

	Total risk-based capital (to risk weighted assets)
	Consolidated Company	$	97,491		14.3	%	$	5,454,042	≥		8	%	$	68,164	≥		n/a
	Bank	$	96,247		14.12	%	$	52,883	≥		8	%	$	68,164	≥		10	%

	Tier 1 capital (to risk weighted assets)
	Consolidated Company	$	88,949		13.05	%	$	2,726,406	≥		4	%	$	40,920	≥		n/a
	Bank	$	87,705		12.86	%	$	26,358	≥		4	%	$	40,920	≥		6	%

	Tier 1 leverage capital (to total average assets)
	Consolidated Company	$	88,949		9.81	%	$	3,626,871	≥		4	%	$	45,349	≥		n/a
	Bank	$	87,705		9.67	%	$	3,627,921	≥		4	%	$	45,349	≥		5	%

	December 31, 2012:												To be well
							For capital						capitalized under
							adequacy						prompt corrective
	(Dollar amounts in thousands)	Actual					purposes						action provisions
		Amount		Ratio			Amount			Ratio			Amount			Ratio

	Total risk-based capital (to risk weighted assets)
	Consolidated Company	$	94,556		14.65	%	$	5,163,468	≥		8	%	$	64,537	≥		n/a
	Bank	$	93,966		14.56	%	$	51,630	≥		8	%	$	64,537	≥		10	%

	Tier 1 capital (to risk weighted assets)
	Consolidated Company	$	86,476		13.4	%	$	2,581,373	≥		4	%	$	38,716	≥		n/a
	Bank	$	85,886		13.31	%	$	25,811	≥		4	%	$	38,716	≥		6	%

	Tier 1 leverage capital (to total average assets)
	Consolidated Company	$	86,476		9.75	%	$	3,547,733	≥		4	%	$	44,363	≥		n/a
	Bank	$	85,886		9.68	%	$	3,549,008	≥		4	%	$	44,363	≥		5	%

Stock_Option_Plans_Tables

Stock Option Plans (Tables) (FNB Bancorp Plan 2008)	12 Months Ended
Stock Option Plans (Tables) (FNB Bancorp Plan 2008)	Dec. 31, 2013
FNB Bancorp Plan 2008	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'
Schedule of option activity under FNB Bancorp Plan	'
							Weighted-
							Average
	2008 FNB Bancorp Plan				Weighted		Remaining		Aggregate
					Average		Contractual		Intrinsic
					Exercise		Term		Value
	Options	Shares			Price		(in years)		0
	Outstanding at January 1, 2013		216,800		$	8.76
	Granted		136,704		$	22.86
	Exercised		(51,914	)	$	8.27			$	637
	Forfeited or expired		—			—
	Outstanding at December 31, 2013		301,590		$	15.23		7.7	$	3,851
	Exercisable at December 31, 2013		130,230		$	10.57		6.3	$	2,270

							Weighted-
							Average
	2002 FNB Bancorp Plan				Weighted		Remaining		Aggregate
					Average		Contractual		Intrinsic
					Exercise		Term		Value
	Options	Shares			Price		(in years)		0
	Outstanding at January 1, 2013		220,010		$	20.11
	Granted		—			—
	Exercised		(52,630	)	$	15.87
	Forfeited or expired		(2,653	)	$	14.62
	Outstanding at December 31, 2013		164,727		$	21.56		1.9	$	1,061
	Exercisable at December 31, 2013		164,727		$	21.56		1.9	$	1,061
							Weighted-
							Average
	1997 First National Bank Plan				Weighted		Remaining		Aggregate
					Average		Contractual		Intrinsic
					Exercise		Term		Value
	Options	Shares			Price		(in years)		0
	Outstanding at January 1, 2013		30,112		$	21.68
	Granted		—			—
	Exercised		—			—
	Forfeited or expired		—			—
	Outstanding at December 31, 2013		30,112		$	21.68		3.5	$	190
	Exercisable at December 31, 2013		30,112		$	21.68		3.5	$	190
Schedule of supplemental information	'
	2008 FNB Bancorp Plan
		2013			2012		2011
	Options outstanding		301,590			216,800		232,019
	Range of exercise prices	$	6.14-$26.60		$	6.14-$11.83	$	6.14-$11.83
	Weighted average remaining contractual life		7.7			7		8
	Fully vested options		130,230			120,609		94,228
	Weighted average exercise price	$	10.57		$	8.18	$	7.93
	Aggregate intrinsic value	$	2,270,122		$	1,144,601	$	292,526
	Weighted average remaining contractual life (in years)		6.3			6.6		7.4

	2002 FNB Bancorp Plan
		2013			2012		2011
	Options outstanding		164,727			220,010		257,454
	Range of exercise prices	$	15.31-$24.54		$	14.62-$24.54	$	14.62-$24.54
	Weighted average remaining contractual life		1.9			2.4		3
	Fully vested options		164,727			220,010		252,079
	Weighted average exercise price	$	21.56		$	20.11	$	19.36
	Aggregate intrinsic value	$	1,061,071		$	132,051	$	0
	Weighted average remaining contractual life (in years)		1.9			2.4		2.9

	1997 FNB Bancorp Plan
		2013			2012		2011
	Options outstanding		30,112			30,112		30,112
	Range of exercise prices	$	21.68-$21.68		$	21.68-$21.58	$	21.68-$21.58
	Weighted average remaining contractual life		3.5			4.5		5.5
	Fully vested options		30,112			30,112		24,087
	Weighted average exercise price	$	21.68		$	21.68	$	21.68
	Aggregate intrinsic value	$	190,437		$	0	$	0
	Weighted average remaining contractual life (in years)		3.5			4.5		5.5

Quarterly_Data_Unaudited_Table

Quarterly Data (Unaudited) (Tables)	12 Months Ended
Quarterly Data (Unaudited) (Tables)	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Data (Unaudited)	'
		2013
	(Dollars in thousands)	First		Second		Third			Fourth

	Interest income	$	9,397	$	9,358	$	9,259		$	9,375
	Interest expense		682		639		560			514
	Net interest income		8,715		8,719		8,699			8,861
	Provision for loan losses		600		510		225			50
	Net interest income, after provision for loan losses		8,115		8,209		8,474			8,811

	Non-interest income		976		1,092		978			1,137
	Non-interest expense		7,739		7,385		6,950			6,954
	Income before income taxes		1,352		1,916		2,502			2,994
	Provision (benefit) for income taxes		422		537		(629	)		995
	Net earnings		930		1,379		3,131			1,999
	Dividends and discount accretion on preferred stock		158		172		118			119
	Net earnings available to common shareholders	$	772	$	1,207	$	3,013		$	1,880

	Basic earnings per share	$	0.2	$	0.31	$	0.76		$	0.47
	Diluted earnings per share	$	0.19	$	0.3	$	0.75		$	0.46

		2012
	(Dollars in thousands)	First		Second		Third			Fourth

	Interest income	$	7,882	$	7,878	$	8,361		$	9,467
	Interest expense		684		653		663			727
	Net interest income		7,198		7,225		7,698			8,740
	Provision for loan losses		400		400		400			633
	Net interest income, after provision for loan losses		6,798		6,825		7,298			8,107

	Non-interest income		1,920		1,415		4,764			1,060
	Non-interest expense		7,053		6,498		6,631			7,557
	Income before income taxes		1,665		1,742		5,431			1,610
	Provision for income taxes		377		514		490			264
	Net earnings		1,288		1,228		4,941			1,346
	Dividends and discount accretion on preferred stock		186		157		158			157
	Net earnings available to common shareholders	$	1,102	$	1,071	$	4,783		$	1,189

	Basic earnings per share	$	0.28	$	0.28	$	1.23		$	0.31
	Diluted earnings per share	$	0.28	$	0.27	$	1.21		$	0.3

Condensed_Financial_Informatio1

Condensed Financial Information of Parent Company (Tables)	12 Months Ended
Condensed Financial Information of Parent Company (Tables)	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Schedule of condensed balance sheets	'
	FNB Bancorp	Condensed balance sheets
	(Dollars in thousands)	2013						2012
	Assets:
	Cash and due from banks	$	981					$	512
	Investments in subsidiary		93,005						94,768
	Income tax receivable from subsidiary		49						49
	Dividend receivable from subsidiary		398						296
	Other assets		242						50
	Total assets	$	94,675					$	95,675
	Liabilities:
	Dividend declared	$	398					$	296
	Other liabilities		28						21
	Total liabilities		426						317
	Stockholders’ equity		94,249						95,358
	Total liabilities and stockholders’ equity	$	94,675					$	95,675
Schedule of condensed statements of earnings	'
	FNB Bancorp	Condensed statements of earnings
	(Dollars in thousands)	2013			2012			2011
	Income:
	Dividends from subsidiary	$	3,955		$	1,279		$	1,269
	Total income		3,955			1,279			1,269
	Expense:
	Other expense		111			85			64
	Total expense		111			85			64
	Income before income taxes and equity in undistributed earnings of subsidiary		3,844			1,194			1,205
	Income tax expense/(benefit)		—			(41	)		(2	)
	Income before equity in undistributed earnings of subsidiary		3,844			1,235			1,207
	Equity in undistributed earnings of subsidiary		3,595			7,568			3,050
	Net earnings		7,439			8,803			4,257
	Dividends and discount accretion on preferred stock		567			658			800
	Net earnings available to common shareholders	$	6,872		$	8,145		$	3,457
Schedule of condensed statements of cash flows	'
	FNB Bancorp	Condensed statement of cash flows
	(Dollars in thousands)	2013			2012			2011
	Net earnings	$	7,439		$	8,803		$	4,257
	Income tax (receivable from) subsidiary		—			(42	)		1
	Options expense (payable to) receivable from subsidiary		—			—			(215	)
	Net increase in other assets		(192	)		(31	)		—
	Net increase in other liabilities		404			11			—
	Undistributed earnings of subsidiary		(3,595	)		(7,568	)		(3,050	)
	Stock-based compensation expense		328			210			293
	Cash flows from operating activities		4,384			1,383			1,286
	Repayment of capital purchase program		(3,150	)		—			(12,600	)
	Small Business Lending Fund funds received		—			—			12,600
	Stock options exercised, including tax benefits of $191 in 2013, $30 in 2012, and none in 2011		1,258			181			11
	Dividends on common stock		(1,456	)		(968	)		(568	)
	Cash dividends on preferred stock series A, B, C		(567	)		(658	)		(545	)
	Cash flows provided by financing activities		(3,915	)		(1,445	)		(1,102	)
	Net (decrease) increase in cash		469			(62	)		184
	Cash, beginning of year		512			574			390
	Cash, end of year	$	981		$	512		$	574

The_Company_and_Summary_of_Sig3

The Company and Summary of Significant Accounting (Details) - Summary of Other income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]	'	'	'
Dividend income-other equity securities	$262	$138	$77
Rental Income-other real estate owned	249	48	97
All other smaller items	352	240	293
Total other income	$863	$426	$467

The_Company_and_Summary_of_Sig4

The Company and Summary of Significant Accounting (Details) - Summary of Other expense (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]	'	'	'
dues and memberships	$109	$111	$104
real estate appraisals	129	72	83
Training and seminars	86	82	79
Amortization of deposit premium	68	100	98
Mastercard	98	97	100
Dunbar courier	113	107	104
OCC Assessment	215	171	261
All other smaller items	425	734	458
Total other expense	$1,243	$1,474	$1,287

The_Company_and_Summary_of_Sig5

The Company and Summary of Significant Accounting (Detail) - Reconciliation of Weighted Average Share used in computing Basic & Diluted Earnings per Share	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]	'	'	'
Weighted average common shares outstanding-used in computing basic earnings per share	3,935	3,879	3,873
Dilutive effect of stock options outstanding, using the treasury stock method	89	64	20
Shares used in computing diluted earnings per share	4,024	3,943	3,893

The_Company_and_Summary_of_Sig6

The Company and Summary of Significant Accounting (Detail) (USD $)	1 Months Ended	12 Months Ended
	Oct. 28, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Depreciation Useful Life [Line Items]	'	'	'	'
Cash reserve requirements, federal reserve bank, minimum (in dollars)	'	$1,278,000	$1,461,000	'
Dividends stock percentage	5.00%	5.00%	5.00%	5.00%
Stock dividends, shares (in shares)	189,218	'	'	'
Common stock, dividend payment terms	'	'payable at the rate of one share of Common Stock for every twenty (20) shares of Common Stock owned.	'	'
Valuation allowance, deferred tax asset, change in amount (in dollars)	'	934,000	'	'
Unrecognized tax benefits (in dollars)	'	718,000	725,000	'
Real estate investments, other (in dollars)	'	$1,806,000	'	'
Tax credit carryforward, description	'	'The federal and state income tax credits are earned over a 10-year period as a result of the investment properties meeting certain criteria and are subject to recapture for noncompliance with such criteria over a 15-year period.	'	'
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	'	179,624	271,655	342,030
Maximum	'	'	'	'
Depreciation Useful Life [Line Items]	'	'	'	'
Finite-lived intangible assets, amortization method	'	'seven	'	'
Minimum	'	'	'	'
Depreciation Useful Life [Line Items]	'	'	'	'
Property, plant and equipment, estimated useful lives	'	'3 years	'	'
Maximum	'	'	'	'
Depreciation Useful Life [Line Items]	'	'	'	'
Property, plant and equipment, estimated useful lives	'	'50 years	'	'

Oceanic_Bank_Acquisition_Detai

Oceanic Bank Acquisition (Detail) - Table of Assets Acquired and Liabilities Assumed in Business Acquisition (USD $)	Sep. 21, 2012
In Thousands, unless otherwise specified	Sep. 21, 2012
Assets acquired:	'
Cash and due from banks	($1,278)
Investment securities, available for sale	13,387
Loans	103,194
Premises and equipment, net	12
Core deposit intangible	110
Other assets	2,504
Total assets acquired	117,929
Liabilities assumed:	'
Noninterest-bearing deposits	11,755
Interest-bearing deposits	95,914
Borrowings	6,097
Accrued expenses and other liabilities	497
Total liabilities assumed	114,263
Net assets acquired/Bargain purchase gain	$3,666

Oceanic_Bank_Acquisition_Detai1

Oceanic Bank Acquisition (Detail) (USD $)	1 Months Ended		12 Months Ended
Oceanic Bank Acquisition (Detail) (USD $)	Aug. 31, 2013	Sep. 21, 2012	Dec. 31, 2012
Business Combinations [Abstract]	'	'	'
Bargain purchase gain	'	$3,666,000	$3,666,000
Reduction in branch facilities costs per month	$30,000	'	'

Restricted_Cash_Balance_Detail

Restricted Cash Balance (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Restricted Cash Disclosure [Abstract]	'	'
Cash reserve requirements, federal reserve bank, minimum	$1,278,000	$1,461,000

Securities_AvailableforSale_De

Securities Available-for-Sale (Detail) - Summary of Available-for-Sale Securities (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Net Investment Income [Line Items]	'	'
Available-for-Sale Securities, Amortized cost	$266,117	$228,390
Available-for-Sale Securities, Unrealized gains	2,657	6,774
Available-for-Sale Securities, Unrealized losses	-4,786	-219
Available-for-Sale Securities, Carrying value	263,988	234,945
U.S. Treasury securities	'	'
Net Investment Income [Line Items]	'	'
Available-for-Sale Securities, Amortized cost	3,069	7,145
Available-for-Sale Securities, Unrealized gains	12	135
Available-for-Sale Securities, Unrealized losses	-54	'
Available-for-Sale Securities, Carrying value	3,027	7,280
Obligations of U.S. government agencies	'	'
Net Investment Income [Line Items]	'	'
Available-for-Sale Securities, Amortized cost	73,691	71,061
Available-for-Sale Securities, Unrealized gains	488	1,206
Available-for-Sale Securities, Unrealized losses	-860	-7
Available-for-Sale Securities, Carrying value	73,319	72,260
Mortgage-backed securities	'	'
Net Investment Income [Line Items]	'	'
Available-for-Sale Securities, Amortized cost	79,873	53,934
Available-for-Sale Securities, Unrealized gains	360	1,383
Available-for-Sale Securities, Unrealized losses	-2,373	-137
Available-for-Sale Securities, Carrying value	77,860	55,180
Obligations of states and political subdivisions	'	'
Net Investment Income [Line Items]	'	'
Available-for-Sale Securities, Amortized cost	82,526	78,147
Available-for-Sale Securities, Unrealized gains	1,467	3,515
Available-for-Sale Securities, Unrealized losses	-1,317	-53
Available-for-Sale Securities, Carrying value	82,676	81,609
Corporate debt	'	'
Net Investment Income [Line Items]	'	'
Available-for-Sale Securities, Amortized cost	26,958	18,103
Available-for-Sale Securities, Unrealized gains	330	535
Available-for-Sale Securities, Unrealized losses	-182	-22
Available-for-Sale Securities, Carrying value	$27,106	$18,616

Securities_AvailableforSale_De1

Securities Available-for-Sale (Detail) - Analysis of Gross Unrealized Losses within the Available-for-Sale Investment Securities Portfolio (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Trading Securities And Other Trading Assets [Line Items]	'	'
Available-for-Sale Securities, Total Fair Value	$137,651	$21,165
Available-for-Sale Securities, less than 12 Months Unrealized Losses	-4,357	-197
Available-for-Sale Securities, Total Fair Value	7,245	478
Available-for-Sale Securities, 12 Months or More than Unrealized Losses	-429	-22
Available-for-Sale Securities, Total Fair Value	144,896	21,643
Available-for-Sale Securities, Total Unrealized Losses	-4,786	-219
U.S. Treasury securities	'	'
Schedule Of Trading Securities And Other Trading Assets [Line Items]	'	'
Available-for-Sale Securities, Total Fair Value	2,002	'
Available-for-Sale Securities, less than 12 Months Unrealized Losses	-54	'
Available-for-Sale Securities, Total Fair Value	'	'
Available-for-Sale Securities, 12 Months or More than Unrealized Losses	'	'
Available-for-Sale Securities, Total Fair Value	2,002	'
Available-for-Sale Securities, Total Unrealized Losses	-54	'
Obligations of U.S. government agencies	'	'
Schedule Of Trading Securities And Other Trading Assets [Line Items]	'	'
Available-for-Sale Securities, Total Fair Value	40,108	4,093
Available-for-Sale Securities, less than 12 Months Unrealized Losses	-860	-7
Available-for-Sale Securities, Total Fair Value	'	'
Available-for-Sale Securities, 12 Months or More than Unrealized Losses	'	'
Available-for-Sale Securities, Total Fair Value	40,108	4,093
Available-for-Sale Securities, Total Unrealized Losses	-860	-7
Mortgage-backed securities	'	'
Schedule Of Trading Securities And Other Trading Assets [Line Items]	'	'
Available-for-Sale Securities, Total Fair Value	51,419	8,580
Available-for-Sale Securities, less than 12 Months Unrealized Losses	-2,015	-137
Available-for-Sale Securities, Total Fair Value	5,664	'
Available-for-Sale Securities, 12 Months or More than Unrealized Losses	-358	'
Available-for-Sale Securities, Total Fair Value	57,083	8,580
Available-for-Sale Securities, Total Unrealized Losses	-2,373	-137
Obligations of states and political subdivisions	'	'
Schedule Of Trading Securities And Other Trading Assets [Line Items]	'	'
Available-for-Sale Securities, Total Fair Value	33,265	8,492
Available-for-Sale Securities, less than 12 Months Unrealized Losses	-1,248	-53
Available-for-Sale Securities, Total Fair Value	1,083	'
Available-for-Sale Securities, 12 Months or More than Unrealized Losses	-69	'
Available-for-Sale Securities, Total Fair Value	34,348	8,492
Available-for-Sale Securities, Total Unrealized Losses	-1,317	-53
Corporate debt	'	'
Schedule Of Trading Securities And Other Trading Assets [Line Items]	'	'
Available-for-Sale Securities, Total Fair Value	10,857	'
Available-for-Sale Securities, less than 12 Months Unrealized Losses	-180	'
Available-for-Sale Securities, Total Fair Value	498	478
Available-for-Sale Securities, 12 Months or More than Unrealized Losses	-2	-22
Available-for-Sale Securities, Total Fair Value	11,355	478
Available-for-Sale Securities, Total Unrealized Losses	($182)	($22)

Securities_AvailableforSale_De2

Securities Available-for-Sale (Detail) - Summary of Debt Securities by Contractual Maturity (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Available-for-sale:	'	'
Due in one year or less, Amortized Cost	$14,443	'
Due in one year or less, Carrying Value	14,569	'
Due after one through five years, Amortized Cost	96,703	'
Due after one through five years, Carrying Value	97,184	'
Due after five years through ten years, Amortized Cost	116,484	'
Due after five years through ten years, Carrying Value	114,537	'
Due after ten years, Amortized Cost	38,487	'
Due after ten years, Carrying Value	37,698	'
Available-for-sale, Amortized Cost	266,117	'
Available-for-Sale Securities, Carrying value	$263,988	$234,945

Securities_AvailableforSale_De3

Securities Available-for-Sale (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Investment Holdings [Line Items]	'	'
Available for sale securities pledged collateral amortized cost	$70,678,000	$81,978,000
Fair Value Securities Pledged	70,640,000	84,399,000
Federal home loan bank stock	3,988,000	4,154,000
Other assets	14,418,000	14,177,000
Federal Reserve Bank and Federal Home Loan Bank	'	'
Investment Holdings [Line Items]	'	'
Other assets	$1,062,000	$1,062,000

Loans_Detail_Summary_of_Loans

Loans (Detail) - Summary of Loans (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	$562,717	$550,917	'
Net deferred loan fees	-495	-230	'
Allowance for loan losses	-9,879	-9,124	-9,897
Net loans	552,343	541,563	'
FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	489,718	450,491	'
Net deferred loan fees	-495	-230	'
Allowance for loan losses	-9,869	-9,124	'
Net loans	479,354	441,137	'
PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	71,674	98,538	'
Net deferred loan fees	'	'	'
Allowance for loan losses	-10	'	'
Net loans	71,664	98,538	'
PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	1,325	1,888	'
Net deferred loan fees	'	'	'
Allowance for loan losses	'	'	'
Net loans	1,325	1,888	'
Commercial real estate	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	325,199	303,860	'
Allowance for loan losses	'	-4,812	-4,745
Commercial real estate \| FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	285,938	254,449	'
Commercial real estate \| PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	37,936	48,009	'
Commercial real estate \| PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	1,325	1,402	'
Real estate construction	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	34,318	18,946	'
Allowance for loan losses	'	-857	-1,171
Real estate construction \| FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	31,290	14,866	'
Real estate construction \| PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	3,028	3,594	'
Real estate construction \| PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	'	486	'
Real estate multi-family	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	46,143	58,004	'
Allowance for loan losses	'	'	-671
Real estate multi-family \| FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	34,357	39,176	'
Real estate multi-family \| PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	11,786	18,828	'
Real estate multi-family \| PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	'	'	'
Real estate 1 to 4 family	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	106,903	112,719	'
Allowance for loan losses	'	-1,516	-1,592
Real estate 1 to 4 family \| FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	98,196	97,329	'
Real estate 1 to 4 family \| PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	8,707	15,390	'
Real estate 1 to 4 family \| PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	'	'	'
Commercial & industrial	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	48,504	55,564	'
Allowance for loan losses	'	-1,875	-1,618
Commercial & industrial \| FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	38,287	42,847	'
Commercial & industrial \| PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	10,217	12,717	'
Commercial & industrial \| PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	'	'	'
Consumer loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	1,650	1,824	'
Consumer loans \| FNB Bancorp Originated	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	1,650	1,824	'
Consumer loans \| PNCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	'	'	'
Consumer loans \| PCI	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Gross loans	'	'	'

Loans_Detail_Summary_of_Allowa

Loans (Detail) - Summary of Allowances for Credit Losses and Recorded Investment in Loans (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for credit losses	'	'	'
Beginning balance	$9,124	$9,897	'
Charge-offs	-792	-2,933	'
Recoveries	162	327	'
Provision	1,385	1,833	1,750
Ending balance	9,879	9,124	9,897
Ending balance: individually evaluated for impairment	595	1,337	'
Ending balance: collectively evaluated for impairment	9,284	7,787	'
Loans:	'	'	'
Ending balance	561,392	549,029	'
Ending balance: individually evaluated for impairment	25,112	25,718	'
Ending balance: collectively evaluated for impairment	536,655	523,992	'
Commercial & industrial	'	'	'
Allowance for credit losses	'	'	'
Beginning balance	1,875	1,618	'
Charge-offs	-57	-1,706	'
Recoveries	73	124	'
Provision	-654	1,839	'
Ending balance	1,237	1,875	'
Ending balance: individually evaluated for impairment	176	384	'
Ending balance: collectively evaluated for impairment	1,061	1,491	'
Loans:	'	'	'
Ending balance	48,504	55,564	'
Ending balance: individually evaluated for impairment	2,497	4,167	'
Ending balance: collectively evaluated for impairment	46,007	51,397	'
Commercial Real estate	'	'	'
Allowance for credit losses	'	'	'
Beginning balance	4,812	4,745	'
Charge-offs	-262	-738	'
Recoveries	35	171	'
Provision	1,178	634	'
Ending balance	5,763	4,812	'
Ending balance: individually evaluated for impairment	165	415	'
Ending balance: collectively evaluated for impairment	5,598	4,397	'
Loans:	'	'	'
Ending balance	323,874	302,458	'
Ending balance: individually evaluated for impairment	17,974	16,099	'
Ending balance: collectively evaluated for impairment	305,900	286,359	'
Real Estate construction	'	'	'
Allowance for credit losses	'	'	'
Beginning balance	857	1,171	'
Charge-offs	-81	-54	'
Recoveries	50	'	'
Provision	-92	-260	'
Ending balance	734	857	'
Ending balance: individually evaluated for impairment	'	232	'
Ending balance: collectively evaluated for impairment	734	625	'
Loans:	'	'	'
Ending balance	34,318	18,460	'
Ending balance: individually evaluated for impairment	189	681	'
Ending balance: collectively evaluated for impairment	34,129	18,460	'
Real Estate Multi family	'	'	'
Allowance for credit losses	'	'	'
Beginning balance	'	671	'
Charge-offs	'	-242	'
Recoveries	'	'	'
Provision	293	-429	'
Ending balance	293	'	'
Ending balance: individually evaluated for impairment	'	'	'
Ending balance: collectively evaluated for impairment	293	'	'
Loans:	'	'	'
Ending balance	46,143	58,004	'
Ending balance: individually evaluated for impairment	375	'	'
Ending balance: collectively evaluated for impairment	46,143	58,004	'
Real Estate 1 to 4 family	'	'	'
Allowance for credit losses	'	'	'
Beginning balance	1,516	1,592	'
Charge-offs	-385	-182	'
Recoveries	3	11	'
Provision	654	95	'
Ending balance	1,788	1,516	'
Ending balance: individually evaluated for impairment	254	306	'
Ending balance: collectively evaluated for impairment	1,534	1,210	'
Loans:	'	'	'
Ending balance	106,903	112,719	'
Ending balance: individually evaluated for impairment	4,077	4,771	'
Ending balance: collectively evaluated for impairment	102,826	107,948	'
Consumer	'	'	'
Allowance for credit losses	'	'	'
Beginning balance	64	100	'
Charge-offs	-7	-11	'
Recoveries	1	21	'
Provision	6	-46	'
Ending balance	64	64	'
Ending balance: individually evaluated for impairment	'	'	'
Ending balance: collectively evaluated for impairment	64	64	'
Loans:	'	'	'
Ending balance	1,650	1,824	'
Ending balance: individually evaluated for impairment	'	'	'
Ending balance: collectively evaluated for impairment	$1,650	$1,824	'

Loans_Detail_Table_of_Impaired

Loans (Detail) - Table of Impaired Loans with the Related Allowance for Loan Losses, Average Investment, and Income Recognized (Originated and purchased not credit impaired, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	$25,112	$25,718
Impaired Financing Receivable, Unpaid Principal Balance	27,004	27,445
Impaired Financing Receivable, Related Allowance	595	1,337
Impaired Financing Receivable, Average Recorded Investment	23,911	26,518
Impaired Financing Receivable, Income Recognized	1,095	1,018
Commercial and industrial	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	2,497	4,167
Impaired Financing Receivable, Unpaid Principal Balance	3,103	4,765
Impaired Financing Receivable, Related Allowance	166	384
Impaired Financing Receivable, Average Recorded Investment	2,914	4,626
Impaired Financing Receivable, Income Recognized	81	150
Commercial real estate construction	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	189	681
Impaired Financing Receivable, Unpaid Principal Balance	196	798
Impaired Financing Receivable, Related Allowance	10	232
Impaired Financing Receivable, Average Recorded Investment	198	6,985
Impaired Financing Receivable, Income Recognized	18	337
Commercial real estate	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	17,974	16,099
Impaired Financing Receivable, Unpaid Principal Balance	19,123	17,013
Impaired Financing Receivable, Related Allowance	165	415
Impaired Financing Receivable, Average Recorded Investment	16,417	10,559
Impaired Financing Receivable, Income Recognized	819	326
Real estate multi family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	375	'
Impaired Financing Receivable, Unpaid Principal Balance	375	'
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	384	'
Impaired Financing Receivable, Income Recognized	25	'
Residential - 1 to 4 family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	4,077	4,771
Impaired Financing Receivable, Unpaid Principal Balance	4,207	4,869
Impaired Financing Receivable, Related Allowance	254	306
Impaired Financing Receivable, Average Recorded Investment	3,998	4,348
Impaired Financing Receivable, Income Recognized	152	205
Originated and PNCI, With no related allowance recorded	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	14,994	13,920
Impaired Financing Receivable, Unpaid Principal Balance	16,426	15,065
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	14,042	14,424
Impaired Financing Receivable, Income Recognized	693	594
Originated and PNCI, With no related allowance recorded \| Commercial and industrial	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	1,059	2,202
Impaired Financing Receivable, Unpaid Principal Balance	1,232	2,338
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	1,204	2,298
Impaired Financing Receivable, Income Recognized	66	120
Originated and PNCI, With no related allowance recorded \| Commercial real estate construction	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	'
Impaired Financing Receivable, Unpaid Principal Balance	'	'
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	'	6,187
Impaired Financing Receivable, Income Recognized	'	333
Originated and PNCI, With no related allowance recorded \| Commercial real estate	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	12,397	10,666
Impaired Financing Receivable, Unpaid Principal Balance	13,535	11,580
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	11,445	4,874
Impaired Financing Receivable, Income Recognized	565	86
Originated and PNCI, With no related allowance recorded \| Real estate multi family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	375	'
Impaired Financing Receivable, Unpaid Principal Balance	375	'
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	384	'
Impaired Financing Receivable, Income Recognized	25	'
Originated and PNCI, With no related allowance recorded \| Residential - 1 to 4 family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	1,163	1,052
Impaired Financing Receivable, Unpaid Principal Balance	1,284	1,147
Impaired Financing Receivable, Related Allowance	'	'
Impaired Financing Receivable, Average Recorded Investment	1,009	1,065
Impaired Financing Receivable, Income Recognized	37	55
Originated and PNCI, With an allowance recorded	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	10,118	11,798
Impaired Financing Receivable, Unpaid Principal Balance	10,578	12,380
Impaired Financing Receivable, Related Allowance	595	1,337
Impaired Financing Receivable, Average Recorded Investment	9,869	12,094
Impaired Financing Receivable, Income Recognized	402	424
Originated and PNCI, With an allowance recorded \| Commercial and industrial	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	1,438	1,965
Impaired Financing Receivable, Unpaid Principal Balance	1,871	2,427
Impaired Financing Receivable, Related Allowance	166	384
Impaired Financing Receivable, Average Recorded Investment	1,710	2,328
Impaired Financing Receivable, Income Recognized	15	30
Originated and PNCI, With an allowance recorded \| Commercial real estate construction	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	189	681
Impaired Financing Receivable, Unpaid Principal Balance	196	798
Impaired Financing Receivable, Related Allowance	10	232
Impaired Financing Receivable, Average Recorded Investment	198	798
Impaired Financing Receivable, Income Recognized	18	4
Originated and PNCI, With an allowance recorded \| Commercial real estate	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	5,577	5,433
Impaired Financing Receivable, Unpaid Principal Balance	5,588	5,433
Impaired Financing Receivable, Related Allowance	165	415
Impaired Financing Receivable, Average Recorded Investment	4,972	5,685
Impaired Financing Receivable, Income Recognized	254	240
Originated and PNCI, With an allowance recorded \| Residential - 1 to 4 family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	2,914	3,719
Impaired Financing Receivable, Unpaid Principal Balance	2,923	3,722
Impaired Financing Receivable, Related Allowance	254	306
Impaired Financing Receivable, Average Recorded Investment	2,989	3,283
Impaired Financing Receivable, Income Recognized	$115	$150

Loans_Detail_Table_of_Loan_on_

Loans (Detail) - Table of Loan on Non-Accrual Status (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]	'	'
Nonaccrual loan	$7,351	$12,474
Commercial & industrial	'	'
Financing Receivable, Impaired [Line Items]	'	'
Nonaccrual loan	2,046	2,618
Real estate - construction	'	'
Financing Receivable, Impaired [Line Items]	'	'
Nonaccrual loan	189	1,898
Commercial real estate	'	'
Financing Receivable, Impaired [Line Items]	'	'
Nonaccrual loan	4,290	6,251
Real estate 1 to 4 family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Nonaccrual loan	$826	$1,707

Loans_Detail_Table_of_Impaired1

Loans (Detail) - Table of Impaired Loan Modifications (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	10	13
Pre- Modification Outstanding Recorded Investment	$5,991	$5,578
Post- Modification Outstanding Recorded Investment	5,991	5,578
Real Estate-construction	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	'
Pre- Modification Outstanding Recorded Investment	189	'
Post- Modification Outstanding Recorded Investment	189	'
Commercial & industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	7
Pre- Modification Outstanding Recorded Investment	'	2,723
Post- Modification Outstanding Recorded Investment	'	2,723
Real estate 1 to 4 family	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	3	3
Pre- Modification Outstanding Recorded Investment	1,236	1,446
Post- Modification Outstanding Recorded Investment	1,236	1,446
Commercial real estate	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	6	3
Pre- Modification Outstanding Recorded Investment	4,566	1,409
Post- Modification Outstanding Recorded Investment	$4,566	$1,409

Loans_Detail_Table_of_Troubled

Loans (Detail) - Table of Troubled Debt Restructurings (TDR Receivables, USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'	'
Accrual status	$8,897	$4,163
Non- accrual status	4,809	5,402
Total modifications	13,706	9,565
Commercial & industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accrual status	461	1,216
Non- accrual status	1,951	2,308
Total modifications	2,412	3,524
Real Estate construction	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accrual status	'	'
Non- accrual status	189	'
Total modifications	189	'
Real estate 1 to 4 family	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accrual status	2,121	333
Non- accrual status	529	1,113
Total modifications	2,650	1,446
Commercial real estate	'	'
Financing Receivable, Modifications [Line Items]	'	'
Accrual status	6,315	2,614
Non- accrual status	2,140	1,981
Total modifications	$8,455	$4,595

Loans_Detail_Summary_Age_Analy

Loans (Detail) - Summary Age Analysis of Past Due Loans (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Purchased [Abstract]	'	'
Financing receivable, Total Loans	$552,343	$541,563
30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	2,243	4,766
30-59 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	815
30-59 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	304	212
60-89 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	119
60-89 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	5,221	63,542
Over 90 Days \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	805	3,623
Over 90 Days \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	1,325	1,888
Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	7,768	11,332
Total Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	805	4,557
Total Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	1,325	1,888
Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	481,950	439,709
Current \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	70,869	93,981
Current \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	'	'
Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	489,718	450,491
Total Loans \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	71,674	98,538
Total Loans \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	1,325	1,888
Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'
Commercial real estate \| 30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	1,403	3,942
Commercial real estate \| 30-59 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	690
Commercial real estate \| 30-59 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Commercial real estate \| 60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Commercial real estate \| 60-89 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Commercial real estate \| 60-89 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Commercial real estate \| Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	2,349	2,525
Commercial real estate \| Over 90 Days \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	616	2,212
Commercial real estate \| Over 90 Days \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	1,325	1,402
Commercial real estate \| Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	3,752	6,467
Commercial real estate \| Total Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	616	2,902
Commercial real estate \| Total Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	1,325	1,402
Commercial real estate \| Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	282,186	247,982
Commercial real estate \| Current \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	37,320	45,107
Commercial real estate \| Current \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	'	'
Commercial real estate \| Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	285,938	254,449
Commercial real estate \| Total Loans \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	37,936	48,009
Commercial real estate \| Total Loans \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	1,325	1,402
Commercial real estate \| Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'
Real estate construction \| 30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate construction \| 30-59 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate construction \| 30-59 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate construction \| 60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate construction \| 60-89 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate construction \| 60-89 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate construction \| Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Real estate construction \| Over 90 Days \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	189	1,411
Real estate construction \| Over 90 Days \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	486
Real estate construction \| Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	'
Real estate construction \| Total Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	189	1,411
Real estate construction \| Total Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	486
Real estate construction \| Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	31,290	14,866
Real estate construction \| Current \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	2,839	2,183
Real estate construction \| Current \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	'	'
Real estate construction \| Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	31,290	14,866
Real estate construction \| Total Loans \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	3,028	3,594
Real estate construction \| Total Loans \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	'	486
Real estate construction \| Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'
Real estate multi-family \| 30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate multi-family \| 30-59 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	75
Real estate multi-family \| 30-59 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate multi-family \| 60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate multi-family \| 60-89 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate multi-family \| 60-89 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate multi-family \| Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Real estate multi-family \| Over 90 Days \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Real estate multi-family \| Over 90 Days \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Real estate multi-family \| Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	'
Real estate multi-family \| Total Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	75
Real estate multi-family \| Total Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	'
Real estate multi-family \| Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	34,357	39,176
Real estate multi-family \| Current \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	11,786	18,753
Real estate multi-family \| Current \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	'	'
Real estate multi-family \| Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	34,357	39,176
Real estate multi-family \| Total Loans \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	11,786	18,828
Real estate multi-family \| Total Loans \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	'	'
Real estate multi-family \| Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'
Real estate 1 to 4 family \| 30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	161	806
Real estate 1 to 4 family \| 30-59 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate 1 to 4 family \| 30-59 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Real estate 1 to 4 family \| 60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	75	168
Real estate 1 to 4 family \| 60-89 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	119
Real estate 1 to 4 family \| 60-89 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Real estate 1 to 4 family \| Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	826	1,210
Real estate 1 to 4 family \| Over 90 Days \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Real estate 1 to 4 family \| Over 90 Days \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Real estate 1 to 4 family \| Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	1,062	2,184
Real estate 1 to 4 family \| Total Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	119
Real estate 1 to 4 family \| Total Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	'
Real estate 1 to 4 family \| Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	97,134	95,145
Real estate 1 to 4 family \| Current \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	8,707	15,271
Real estate 1 to 4 family \| Current \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	'	'
Real estate 1 to 4 family \| Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	98,196	97,329
Real estate 1 to 4 family \| Total Loans \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	8,707	15,390
Real estate 1 to 4 family \| Total Loans \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	'	'
Real estate 1 to 4 family \| Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'
Commercial & industrial \| 30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	563	18
Commercial & industrial \| 30-59 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	50
Commercial & industrial \| 30-59 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	'	'
Commercial & industrial \| 60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	210	44
Commercial & industrial \| 60-89 Days Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Commercial & industrial \| 60-89 Days Past Due \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	'	'
Commercial & industrial \| Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	2,046	2,619
Commercial & industrial \| Over 90 Days \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Commercial & industrial \| Over 90 Days \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Commercial & industrial \| Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	2,819	2,681
Commercial & industrial \| Total Past Due \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	'	50
Commercial & industrial \| Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	35,468	40,166
Commercial & industrial \| Current \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	10,217	12,667
Commercial & industrial \| Current \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	'	'
Commercial & industrial \| Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	38,287	42,847
Commercial & industrial \| Total Loans \| Purchased Not Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	10,217	12,717
Commercial & industrial \| Total Loans \| Purchased Credit Impaired	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	'	'
Commercial & industrial \| Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'
Consumer \| 30-59 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, 30-59 Days Past Due	116	'
Consumer \| 60-89 Days Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	19	'
Consumer \| Over 90 Days \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Over 90 Days	'	'
Consumer \| Total Past Due \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Total Past Due	135	'
Consumer \| Current \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Current	1,515	1,824
Consumer \| Total Loans \| Originated	'	'
Purchased [Abstract]	'	'
Financing receivable, Total Loans	1,650	1,824
Consumer \| Recorded Investment > 90 Days and Accruing \| Originated	'	'
Purchased [Abstract]	'	'
Financing Receivable, Recorded Investment > 90 Days and Accruing	'	'

Loans_Detail_Table_of_Credit_Q

Loans (Detail) - Table of Credit Quality Indicators (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Purchased	'	'
Loans, net	$552,343	$541,563
Originated	'	'
Purchased	'	'
Loans, net	489,718	450,491
Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	71,674	98,538
Purchased Credit Impaired	'	'
Purchased	'	'
Loans, net	1,325	1,888
Pass \| Originated	'	'
Purchased	'	'
Loans, net	480,368	439,282
Pass \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	60,164	76,995
Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	2,903	2,372
Special Mention \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	4,951	7,941
Substandard \| Originated	'	'
Purchased	'	'
Loans, net	6,183	7,720
Substandard \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	6,559	13,602
Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	264	1,117
Commercial real estate \| Originated	'	'
Purchased	'	'
Loans, net	285,938	254,449
Commercial real estate \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	37,936	48,009
Commercial real estate \| Purchased Credit Impaired	'	'
Purchased	'	'
Loans, net	1,325	1,402
Commercial real estate \| Pass \| Originated	'	'
Purchased	'	'
Loans, net	280,356	249,991
Commercial real estate \| Pass \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	28,342	30,600
Commercial real estate \| Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	2,330	2,372
Commercial real estate \| Special Mention \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	4,951	7,902
Commercial real estate \| Substandard \| Originated	'	'
Purchased	'	'
Loans, net	3,252	2,086
Commercial real estate \| Substandard \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	4,643	9,507
Commercial real estate \| Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Commercial real estate \| Doubtful \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Real estate construction \| Originated	'	'
Purchased	'	'
Loans, net	31,290	14,866
Real estate construction \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	3,028	3,594
Real estate construction \| Purchased Credit Impaired	'	'
Purchased	'	'
Loans, net	'	486
Real estate construction \| Pass \| Originated	'	'
Purchased	'	'
Loans, net	29,673	13,266
Real estate construction \| Pass \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	1,520	'
Real estate construction \| Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	573	'
Real estate construction \| Special Mention \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	39
Real estate construction \| Substandard \| Originated	'	'
Purchased	'	'
Loans, net	1,044	1,600
Real estate construction \| Substandard \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	1,508	3,555
Real estate construction \| Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Real estate construction \| Doubtful \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Real estate multi-family \| Originated	'	'
Purchased	'	'
Loans, net	34,357	39,176
Real estate multi-family \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	11,786	18,828
Real estate multi-family \| Pass \| Originated	'	'
Purchased	'	'
Loans, net	34,357	39,176
Real estate multi-family \| Pass \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	11,786	18,828
Real estate multi-family \| Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Real estate multi-family \| Substandard \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Real estate multi-family \| Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Real estate multi-family \| Doubtful \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Real estate 1 to 4 family \| Originated	'	'
Purchased	'	'
Loans, net	98,196	97,329
Real estate 1 to 4 family \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	8,707	15,390
Real estate 1 to 4 family \| Pass \| Originated	'	'
Purchased	'	'
Loans, net	97,514	95,579
Real estate 1 to 4 family \| Pass \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	8,299	14,850
Real estate 1 to 4 family \| Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Real estate 1 to 4 family \| Special Mention \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Real estate 1 to 4 family \| Substandard \| Originated	'	'
Purchased	'	'
Loans, net	429	1,470
Real estate 1 to 4 family \| Substandard \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	408	540
Real estate 1 to 4 family \| Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	253	280
Real estate 1 to 4 family \| Doubtful \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Commercial & industrial \| Originated	'	'
Purchased	'	'
Loans, net	38,287	42,847
Commercial & industrial \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	10,217	12,717
Commercial & industrial \| Pass \| Originated	'	'
Purchased	'	'
Loans, net	36,837	39,446
Commercial & industrial \| Pass \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	10,217	12,717
Commercial & industrial \| Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Commercial & industrial \| Special Mention \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Commercial & industrial \| Substandard \| Originated	'	'
Purchased	'	'
Loans, net	1,439	2,564
Commercial & industrial \| Substandard \| Purchased Not Credit Impaired	'	'
Purchased	'	'
Loans, net	'	'
Commercial & industrial \| Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	11	837
Consumer loans \| Originated	'	'
Purchased	'	'
Loans, net	1,650	1,824
Consumer loans \| Pass \| Originated	'	'
Purchased	'	'
Loans, net	1,631	1,824
Consumer loans \| Special Mention \| Originated	'	'
Purchased	'	'
Loans, net	'	'
Consumer loans \| Substandard \| Originated	'	'
Purchased	'	'
Loans, net	19	'
Consumer loans \| Doubtful \| Originated	'	'
Purchased	'	'
Loans, net	'	'

Loans_Detail

Loans (Detail) (USD $)	12 Months Ended
Loans (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Disclosure [Abstract]	'	'	'
Nonaccrual Loans	$7,351,000	$12,474,000	'
Interest income on impaired loans	1,095,000	1,018,000	1,143,000
Interest income on impaired loans not collected	656,000	1,358,000	1,137,000
Cumulative unpaid interest on impaired loans	$3,430,000	$2,774,000	$1,967,000
Troubled Debt Restructuring, Debtor, Current Period, Description of Changes in Terms	'During the years ended December 31, 2013 and 2012, no loans defaulted within twelve months following the date of restructure. All restructurings were a modification of interest rate and/or payment. There were no principal reductions granted.	'	'

Foreclosed_Assets_A_summary_of

Foreclosed Assets - A summary of the activity in the balance of foreclosed assets follows (in thousands): (Detail) - Table of Foreclosed Assets (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Number	Number	Number
Finance Loan And Lease Receivables Held For Investments Foreclosed Assets [Abstract]	'	'	'
Beginning balance, net	$6,650	$2,747	$6,680
Additions/transfers from loans	25	4,894	622
Disposition/sales	-1,288	-932	-4,012
Valuation adjustments	-69	-59	-543
Ending balance, net	5,318	6,650	2,747
Ending valuation allowance	-122	-1,965	-2,041
Ending number of foreclosed assets	4	5	4
Proceeds from sale of foreclosed assets	1,288	932	4,078
Gain on sale of foreclosed assets	$96	$6	$66

Related_Party_Transactions_Det

Related Party Transactions (Detail) - Table of Related Party Transactions (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Related Party Transactions [Abstract]	'	'
Balance, beginning of year	$10,225	$21,573
Additions	6,990	6,358
Repayments	-6,133	-17,706
Balance, end of year	11,082	10,225
Related party deposits	$3,491	$2,682

Bank_Premises_Equipment_and_Le2

Bank Premises, Equipment, and Leasehold Improvements (Detail) - Table of Bank Premises, Equipment, and Leasehold Improvements (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]	'	'
Buildings	$10,460	$10,453
Equipment & furniture	8,722	9,543
Leasehold improvements	1,714	1,519
Buildings, equipment & furniture and leasehold improvements, gross	20,896	21,515
Accumulated depreciation and amortization	-13,712	-14,137
Buildings, equipment & furniture and leasehold improvements, net	7,184	7,378
Land	5,328	5,328
Buildings, equipment & furniture, leasehold improvements and land, net	$12,512	$12,706

Bank_Premises_Equipment_and_Le3

Bank Premises, Equipment, and Leasehold Improvements (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]	'	'	'
Depreciation and amortization expense	$1,250,000	$1,415,000	$1,487,000

Deposits_Detail_Summary_of_Mat

Deposits (Detail) - Summary of Maturities of all Time Certificates of Deposit (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure Text Block [Abstract]	'	'
2014	$96,881	'
2015	12,946	'
2016	10,745	'
2017	3,462	'
2018	118	'
Total, maturities of all time certificates of deposit	$124,152	$171,066

Deposits_Detail

Deposits (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure Text Block [Abstract]	'	'
Aggregate amount of time certificates each with minimum denomination of $100,000 or more	$86,337,000	$122,734,000

Federal_Home_Loan_Bank_Advance1

Federal Home Loan Bank Advances (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	$15,000,000	$1,220,000
Federal Home Loan Bank of San Francisco	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	15,000,000	1,220,000
Maximum borrowing capacity under (''FHLB")	271,829,000	'
Federal Home Loan Bank of San Francisco \| Fhlb Advance At 0.06 Percent Due On 2 January 2014	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	2,000,000	'
Federal Home Loan Bank borrowings rate	0.06%	'
Federal Home Loan Bank of San Francisco \| Fhlb Advance At 0.20 Percent Due On 10 January 2014	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	13,000,000	'
Federal Home Loan Bank borrowings rate	0.20%	'
Federal Home Loan Bank of San Francisco \| Fhlb Advance At 1.05 Percent Due On 31 January 2013	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	'	500,000
Federal Home Loan Bank borrowings rate	'	1.05%
Federal Home Loan Bank of San Francisco \| Fhlb Advance At 1.85 Percent Due On 22 January 2013	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	'	330,000
Federal Home Loan Bank borrowings rate	'	1.85%
Federal Home Loan Bank of San Francisco \| Fhlb Advance At 4.99 Percent Due On 31 January 2013	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'
Federal Home Loan Bank (''FHLB'') borrowings outstanding	'	$390,000
Federal Home Loan Bank borrowings rate	'	4.99%

Commitments_and_Contingencies_1

Commitments and Contingencies (Detail) - Table of Operating Lease Commitments (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
2014	$971
2015	990
2016	1,010
2017	1,021
2018	556
Thereafter	1,510
Total	$6,058

Commitments_and_Contingencies_2

Commitments and Contingencies (Detail) (USD $)	12 Months Ended
Commitments and Contingencies (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]	'	'	'
Rent expense for operating leases	$1,339,000	$1,025,000	$846,000

Salary_Deferral_Plan_Detail

Salary Deferral Plan (Detail) (USD $)	12 Months Ended
Salary Deferral Plan (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension And Other Postretirement Benefits Disclosure [Abstract]	'	'	'
Percentage of qualifying employees wages as a profit sharing contribution	'3%	'	'
Accrued contribution to 401(k) plan	$398,000	$371,000	$308,000

Salary_Continuation_and_Deferr1

Salary Continuation and Deferred Compensation Plans (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plan [Line Items]	'	'	'
Accrued compensation payable under the salary continuation plan	$401,879	$371,000	$250,000
Salary Continuation Plan	'	'	'
Pension Plan [Line Items]	'	'	'
Accrued compensation payable under the salary continuation plan	2,332,000	2,060,000	'
Deferred Compensation Plan	'	'	'
Pension Plan [Line Items]	'	'	'
Accrued compensation payable under the salary continuation plan	$1,214,000	$785,000	'

Preferred_Stock_Detail

Preferred Stock (Detail) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2013	6-May-13	Dec. 31, 2012	Sep. 15, 2011	Sep. 15, 2011	Sep. 15, 2011
				Payment Terms First Five Years	Payment Terms First Two Years	Payment Terms Four and a Half Years and After
				Preferred Stock series C	Preferred Stock series C	Preferred Stock series C
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]	'	'	'	'	'	'
Preferred stock, dividend rate, percentage	1.00%	'	'	5.00%	7.00%	9.00%
Preferred stock, dividend payment terms	'	'	'	'	'Two years	'4.5 years
Preferred stock, redemption amount percentage	'	25.00%	'	'	'	'
Preferred stock, redemption amount	'	$3,150,000	'	'	'	'
Preferred stock value	9,450,000	12,600,000	12,600,000	'	'	'
Payment of remaining SBLF obligation	$9,450,000	'	'	'	'	'

Income_Taxes_Detail_Table_of_I

Income Taxes (Detail) - Table of Income Taxes (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
Income tax provision (benefit), current	$984	$1,916	$1,876
Deferred:	'	'	'
Income tax provision (benefit), deferred	341	-271	-308
Income tax expense (benefit)	1,325	1,645	1,568
Federal	'	'	'
Current:	'	'	'
Income tax provision (benefit), current	697	467	1,201
Deferred:	'	'	'
Income tax provision (benefit), deferred	197	420	-75
State	'	'	'
Current:	'	'	'
Income tax provision (benefit), current	287	1,449	675
Deferred:	'	'	'
Income tax provision (benefit), deferred	$144	($691)	($233)

Income_Taxes_Detail_Summary_of

Income Taxes (Detail) - Summary of Federal Income Tax Differences in Statutory and Effective Tax Rates in Percentages	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Statutory rates	34.00%	34.00%	34.00%
Increase (decrease) resulting from:	'	'	'
Tax exempt Income for federal purposes	-9.10%	-9.00%	-11.30%
State taxes on income, net of federal benefit	3.30%	4.10%	5.00%
Benefits from low income housing credits	-1.00%	-0.90%	-4.80%
Tax benefits related to an acquisition	'	-13.50%	'
True-up of prior year provision	-4.30%	'	'
Increase in the valuation reserve	-9.90%	0.80%	'
Other, net	2.10%	0.20%	4.10%
Effective tax rate	15.10%	15.70%	27.00%

Income_Taxes_Detail_Table_of_D

Income Taxes (Detail) - Table of Deferred Tax Assets and Liabilities (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets	'	'	'
Allowance for loan losses	($9,879)	($9,124)	($9,897)
Deferred tax liabilities	'	'	'
Net deferred tax asset before valuation allowance	9,714	7,422	6,473
Valuation allowance	'	-934	-820
Net deferred tax assets (included in other assets)	9,714	6,488	5,653
Assets	'	'	'
Deferred tax assets	'	'	'
Allowance for loan losses	4,449	4,081	4,378
Accrued salaries and officers compensation	1,492	1,276	1,399
Capitalized interest on buildings	11	14	'
Expenses accrued on books, not yet deductible in tax return	1,480	2,065	2,039
Depreciation	405	501	565
Net operating loss carryforward	89	334	408
Tax credit carryforwards	878	1,185	820
Acquisition accounting differences	885	1,620	'
Unrealized depreciation on available-for-sale securities	876	'	'
Deferred tax assets, net	10,565	11,076	9,609
Liability	'	'	'
Deferred tax liabilities	'	'	'
Unrealized appreciation on available-for-sale securities	'	2,698	2,283
State income taxes	668	766	668
Core deposit intangible	61	91	87
Expenses and credits deducted on tax return, not on books	122	99	98
Total deferred tax liabilities	$851	$3,654	$3,136

Income_Taxes_Detail

Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Tax Operating Loss Carryforward [Line Items]	'
Operating loss carry-forwards	$262,000
Tax credit carryforward, description	'The federal and state income tax credits are earned over a 10-year period as a result of the investment properties meeting certain criteria and are subject to recapture for noncompliance with such criteria over a 15-year period.
Life	'
Tax Operating Loss Carryforward [Line Items]	'
Tax credit carryforward, description	'fifteen
Maximum	'
Tax Operating Loss Carryforward [Line Items]	'
Deferred tax assets, operating loss carryforwards	$469,000

Financial_Instruments_Detail_S

Financial Instruments (Detail) - Summary of Financial Instruments whose contract amounts represent Credit Risk (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financial instruments whose contract amounts represent credit risk:	'	'
Credit risk of financial instruments	$129,709	$102,552
Undisbursed loan commitments	'	'
Financial instruments whose contract amounts represent credit risk:	'	'
Credit risk of financial instruments	52,398	32,529
Lines of credit	'	'
Financial instruments whose contract amounts represent credit risk:	'	'
Credit risk of financial instruments	65,120	62,616
Mastercard/Visa lines	'	'
Financial instruments whose contract amounts represent credit risk:	'	'
Credit risk of financial instruments	5,992	4,998
Letters of credit	'	'
Financial instruments whose contract amounts represent credit risk:	'	'
Credit risk of financial instruments	$6,199	$2,409

Financial_Instruments_Detail

Financial Instruments (Detail) (USD $)	Dec. 31, 2013
Financial	'
Letters Of Credit [Line Items]	'
Standby letters of credit	$5,318,000
Performance	'
Letters Of Credit [Line Items]	'
Standby letters of credit	$881,000

Fair_Value_Measurements_Detail

Fair Value Measurements (Detail) - Table of Assets and Liabilities Measured at Fair Value on a Recurring Basis (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
U. S. Treasury securities	$3,027	$7,280
Obligations of U.S. Government agencies	73,319	72,260
Mortgage-backed securities	77,860	55,180
Obligations of states and political subdivisions	82,676	81,609
Total assets measured at fair value	263,988	234,945
Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
U. S. Treasury securities	3,027	7,280
Obligations of U.S. Government agencies	'	'
Mortgage-backed securities	'	'
Obligations of states and political subdivisions	'	'
Total assets measured at fair value	3,027	7,280
Other Observable Inputs (Level 2)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
U. S. Treasury securities	'	'
Obligations of U.S. Government agencies	73,319	72,260
Mortgage-backed securities	77,860	55,180
Obligations of states and political subdivisions	82,676	81,609
Total assets measured at fair value	260,961	227,665
Significant Unobservable Inputs (Level 3)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
U. S. Treasury securities	'	'
Obligations of U.S. Government agencies	'	'
Mortgage-backed securities	'	'
Obligations of states and political subdivisions	'	'
Total assets measured at fair value	'	'
Corporate Debt	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Corporate debt	27,106	18,616
Corporate Debt \| Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Corporate debt	'	'
Corporate Debt \| Other Observable Inputs (Level 2)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Corporate debt	27,106	18,616
Corporate Debt \| Significant Unobservable Inputs (Level 3)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Corporate debt	'	'

Fair_Value_Measurements_Detail1

Fair Value Measurements (Detail) - Table of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Impaired loans	$563,325	$547,740
Other real estate owned	3,027	7,280
Total impaired assets measured at fair value	263,988	234,945
Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Other real estate owned	3,027	7,280
Total impaired assets measured at fair value	3,027	7,280
Other Observable Inputs (Level 2)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Other real estate owned	'	'
Total impaired assets measured at fair value	260,961	227,665
Significant Unobservable Inputs (Level 3)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Impaired loans	563,325	547,740
Other real estate owned	'	'
Total impaired assets measured at fair value	'	'
Impaired Asset	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Impaired loans	4,810	2,494
Other real estate owned	1,771	4,710
Total impaired assets measured at fair value	6,581	7,204
Impaired Asset \| Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Impaired loans	'	'
Other real estate owned	'	'
Total impaired assets measured at fair value	'	'
Impaired Asset \| Other Observable Inputs (Level 2)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Impaired loans	'	'
Other real estate owned	'	'
Total impaired assets measured at fair value	'	'
Impaired Asset \| Significant Unobservable Inputs (Level 3)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [LineItems]	'	'
Impaired loans	4,810	2,494
Other real estate owned	1,771	4,710
Total impaired assets measured at fair value	$6,581	$7,204

Fair_Value_Measurements_Detail2

Fair Value Measurements (Detail) - Table of Estimated Fair Value of Assets and Liabilities (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financial assets:	'	'	'	'
Cash and cash equivalents, Carrying amount	$14,007,000	$27,861,000	$38,474,000	$60,874,000
Cash and cash equivalents, Fair value	14,007,000	27,861,000	'	'
Interest-bearing time deposits with financial Institutions, Carrying amount	5,543,000	13,216,000	'	'
Interest-bearing time deposits with financial institutions, Fair value	5,543,000	13,216,000	'	'
Securities available for sale, Carrying amount	263,988,000	234,945,000	'	'
Securities available-for-sale, Fair value	263,988,000	234,945,000	'	'
Loans, net, Carrying amount	562,717,000	550,917,000	'	'
Loans, net ,Fair value	563,325,000	547,740,000	'	'
Available-for-sale Securities, Equity Securities	5,300,000	5,464,000	'	'
Other equity securities, Fair Value	5,300,000	5,464,000	'	'
Accrued interest receivable, Carrying amount	3,808,000	3,760,000	'	'
Accrued interest receivable,Fair value	3,808,000	3,760,000	'	'
Financial liabilities:	'	'	'	'
Deposits, Carrying amount	773,615,000	768,352,000	'	'
Deposits, Fair value	774,012,000	769,043,000	'	'
Federal Home Loan Bank advances, Carrying amount	15,000,000	1,220,000	'	'
Federal Home Loan Bank advances, Fair value	15,000,000	1,221,000	'	'
Accrued interest payable, Carrying amount	224,000	349,000	'	'
Accrued interest payable, Fair value	224,000	349,000	'	'
Off-balance-sheet liabilities:	'	'	'	'
Undisbursed loan commitments, lines of credit, standby letters of credit and Mastercard lines of credit, Fair value	1,297,000	1,026,000	'	'
Fair value measurements Level 1	'	'	'	'
Financial assets:	'	'	'	'
Cash and cash equivalents, Fair value	14,007,000	27,861,000	'	'
Securities available-for-sale, Fair value	3,027,000	7,280,000	'	'
Fair value measurements Level 2	'	'	'	'
Financial assets:	'	'	'	'
Interest-bearing time deposits with financial institutions, Fair value	5,543,000	13,216,000	'	'
Securities available-for-sale, Fair value	260,961,000	227,665,000	'	'
Accrued interest receivable,Fair value	3,808,000	3,760,000	'	'
Financial liabilities:	'	'	'	'
Deposits, Fair value	774,012,000	769,043,000	'	'
Federal Home Loan Bank advances, Fair value	15,000,000	1,221,000	'	'
Accrued interest payable, Fair value	224,000	349,000	'	'
Fair value measurements Level 3	'	'	'	'
Financial assets:	'	'	'	'
Loans, net ,Fair value	563,325,000	547,740,000	'	'
Other equity securities, Fair Value	5,300,000	5,464,000	'	'
Off-balance-sheet liabilities:	'	'	'	'
Undisbursed loan commitments, lines of credit, standby letters of credit and Mastercard lines of credit, Fair value	$1,297,000	$1,026,000	'	'

Regulatory_Matters_Detail_Summ

Regulatory Matters (Detail) - Summary of Consolidated Actual Capital and Ratios (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Consolidated Company \| Total to Risk-Weighted Assets	'	'
Risk Based Capital [Line Items]	'	'
Total risk-based capital, Actual Amount	$97,491	$94,556
Total risk-based capital, Actual Ratio	14.30%	14.65%
Total risk-based capital, For capital adequacy purposes, Amount	5,454,042	5,163,468
Total risk-based capital, For capital adequacy purposes, Ratio	8.00%	8.00%
Total risk-based capital,To be well capitalized under prompt corrective action provisions, Amount	68,164	64,537
Total risk-based capital,To be well capitalized under prompt corrective action provisions, Ratio	'	'
Consolidated Company \| Tier 1 Capital to Risk-Weighted Assets	'	'
Risk Based Capital [Line Items]	'	'
Tier 1 capital , Actual, Amount	88,949	86,476
Tier 1 capital, Actual, Ratio	13.05%	13.40%
Tier 1 capital , For capital adequacy purposes, Amount	2,726,406	2,581,373
Tier 1 capital , For capital adequacy purposes, Ratio	4.00%	4.00%
Tier 1 capital ,To be well capitalized under prompt corrective action provisions, Amount	40,920	38,716
Tier 1 capital ,To be well capitalized under prompt corrective action provisions, Ratio	'	'
Consolidated Company \| Tier 1 Leverage Capital to Total Average Assets	'	'
Risk Based Capital [Line Items]	'	'
Tier 1 leverage capital , Actual, Amount	88,949	86,476
Tier 1 leverage capital, Actual,Ratio	9.81%	9.75%
Tier 1 leverage capital, For capital adequacy purposes, Amount	3,626,871	3,547,733
Tier 1 leverage capital, For capital adequacy purposes, Ratio	4.00%	4.00%
Tier 1 leverage capital, To be well capitalized under prompt corrective action provisions, Amount	45,349	44,363
Tier 1 leverage capital,To be well capitalized under prompt corrective action provisions, Ratio	'	'
Bank \| Total to Risk-Weighted Assets	'	'
Risk Based Capital [Line Items]	'	'
Total risk-based capital, Actual Amount	96,247	93,966
Total risk-based capital, Actual Ratio	14.12%	14.56%
Total risk-based capital, For capital adequacy purposes, Amount	52,883	51,630
Total risk-based capital, For capital adequacy purposes, Ratio	8.00%	8.00%
Total risk-based capital,To be well capitalized under prompt corrective action provisions, Amount	68,164	64,537
Total risk-based capital,To be well capitalized under prompt corrective action provisions, Ratio	10.00%	10.00%
Bank \| Tier 1 Capital to Risk-Weighted Assets	'	'
Risk Based Capital [Line Items]	'	'
Tier 1 capital , Actual, Amount	87,705	85,886
Tier 1 capital, Actual, Ratio	12.86%	13.31%
Tier 1 capital , For capital adequacy purposes, Amount	26,358	25,811
Tier 1 capital , For capital adequacy purposes, Ratio	4.00%	4.00%
Tier 1 capital ,To be well capitalized under prompt corrective action provisions, Amount	40,920	38,716
Tier 1 capital ,To be well capitalized under prompt corrective action provisions, Ratio	6.00%	6.00%
Bank \| Tier 1 Leverage Capital to Total Average Assets	'	'
Risk Based Capital [Line Items]	'	'
Tier 1 leverage capital , Actual, Amount	87,705	85,886
Tier 1 leverage capital, Actual,Ratio	9.67%	9.68%
Tier 1 leverage capital, For capital adequacy purposes, Amount	3,627,921	3,549,008
Tier 1 leverage capital, For capital adequacy purposes, Ratio	4.00%	4.00%
Tier 1 leverage capital, To be well capitalized under prompt corrective action provisions, Amount	$45,349	$44,363
Tier 1 leverage capital,To be well capitalized under prompt corrective action provisions, Ratio	5.00%	5.00%

Stock_Option_Plans_Detail_Tabl

Stock Option Plans (Detail) - Table of Stock Option Plans (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
FNB Bancorp Plan 2008	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Outstanding at January 1, 2013 ,Shares	216,800	'
Outstanding at January 1, 2013, Weighted Average Exercise Price (in dollars per share)	$8.76	'
Granted shares	136,704	'
Granted, Weighted Average Exercise Price (in dollars per share)	$22.86	'
Exercised, Shares	-51,914	-14,493
Exercised, Weighted Average Exercise Price (in dollars per share)	$8.27	'
Exercised, Aggregate Intrinsic Value (in dollars)	$637	'
Forfeited or expired, Shares	'	'
Forfeited or expired, Weighted Average Exercise Price (in dollars per share)	'	'
Outstanding at December 31, 2013, Shares	301,590	216,800
Outstanding at December 31, 2013, Weighted Average Exercise Price (in dollars per share)	$15.23	$8.76
Outstanding at December 31, 2013, Weighted- Average Remaining Contractual Term (in years)	'7 years 8 months 12 days	'
Outstanding at December 31, 2013, Aggregate Intrinsic Value (in dollars)	3,851	'
Exercisable at December 31, 2013, Shares	130,230	'
Exercisable at December 31, 2013, Weighted Average Exercise Price (in dollars per share)	$10.57	'
Exercisable at December 31, 2013, Weighted- Average Remaining Contractual Term (in years)	'6 years 3 months 18 days	'
Exercisable at December 31, 2013 , Aggregate Intrinsic Value (in dollars)	2,270	'
FNB Bancorp Plan 2002	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Outstanding at January 1, 2013 ,Shares	220,010	'
Outstanding at January 1, 2013, Weighted Average Exercise Price (in dollars per share)	$20.11	'
Granted shares	'	'
Granted, Weighted Average Exercise Price (in dollars per share)	'	'
Exercised, Shares	-52,630	-2,689
Exercised, Weighted Average Exercise Price (in dollars per share)	$15.87	'
Exercised, Aggregate Intrinsic Value (in dollars)	'	'
Forfeited or expired, Shares	-2,653	'
Forfeited or expired, Weighted Average Exercise Price (in dollars per share)	$14.62	'
Outstanding at December 31, 2013, Shares	164,727	220,010
Outstanding at December 31, 2013, Weighted Average Exercise Price (in dollars per share)	$21.56	$20.11
Outstanding at December 31, 2013, Weighted- Average Remaining Contractual Term (in years)	'1 year 10 months 24 days	'
Outstanding at December 31, 2013, Aggregate Intrinsic Value (in dollars)	1,061	'
Exercisable at December 31, 2013, Shares	164,727	'
Exercisable at December 31, 2013, Weighted Average Exercise Price (in dollars per share)	$21.56	'
Exercisable at December 31, 2013, Weighted- Average Remaining Contractual Term (in years)	'1 year 10 months 24 days	'
Exercisable at December 31, 2013 , Aggregate Intrinsic Value (in dollars)	1,061	'
FNB Bancorp Bank 1997	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Outstanding at January 1, 2013 ,Shares	30,112	'
Outstanding at January 1, 2013, Weighted Average Exercise Price (in dollars per share)	$21.68	'
Granted shares	'	'
Granted, Weighted Average Exercise Price (in dollars per share)	'	'
Exercised, Shares	'	'
Exercised, Weighted Average Exercise Price (in dollars per share)	'	'
Exercised, Aggregate Intrinsic Value (in dollars)	'	'
Forfeited or expired, Shares	'	'
Forfeited or expired, Weighted Average Exercise Price (in dollars per share)	'	'
Outstanding at December 31, 2013, Shares	30,112	'
Outstanding at December 31, 2013, Weighted Average Exercise Price (in dollars per share)	$21.68	'
Outstanding at December 31, 2013, Weighted- Average Remaining Contractual Term (in years)	'3 years 6 months	'
Outstanding at December 31, 2013, Aggregate Intrinsic Value (in dollars)	190	'
Exercisable at December 31, 2013, Shares	30,112	'
Exercisable at December 31, 2013, Weighted Average Exercise Price (in dollars per share)	$21.68	'
Exercisable at December 31, 2013, Weighted- Average Remaining Contractual Term (in years)	'3 years 6 months	'
Exercisable at December 31, 2013 , Aggregate Intrinsic Value (in dollars)	$190	'

Stock_Option_Plans_Detail_Tabl1

Stock Option Plans (Detail) - Table of Stock Options Plan Supplemental Information (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
FNB Bancorp Plan 2008	'	'	'
Pension Plan [Line Items]	'	'	'
Options outstanding	301,590	216,800	232,019
Range of exercise prices - lower	$6.14	$6.14	$6.14
Range of exercise prices - upper	$26.60	$11.83	$11.83
Weighted average remaining contractual life	'7 years 8 months 12 days	'7 years	'8 years
Fully vested options	130,230	120,609	94,228
Weighted average exercise price	$10.57	$8.18	$7.93
Aggregate intrinsic value (in dollars)	$2,270,122	$1,144,601	$292,526
Weighted average remaining contractual life (in years)	'6 years 3 months 18 days	'6 years 7 months 6 days	'7 years 4 months 24 days
FNB Bancorp Plan 2002	'	'	'
Pension Plan [Line Items]	'	'	'
Options outstanding	164,727	220,010	257,454
Range of exercise prices - lower	$15.31	$14.62	$14.62
Range of exercise prices - upper	$24.54	$24.54	$24.54
Weighted average remaining contractual life	'1 year 10 months 24 days	'2 years 4 months 24 days	'3 years
Fully vested options	164,727	220,010	252,079
Weighted average exercise price	$21.56	$20.11	$19.36
Aggregate intrinsic value (in dollars)	1,061,071	132,051	0
Weighted average remaining contractual life (in years)	'1 year 10 months 24 days	'2 years 4 months 24 days	'2 years 10 months 24 days
FNB Bancorp Bank 1997	'	'	'
Pension Plan [Line Items]	'	'	'
Options outstanding	30,112	30,112	30,112
Range of exercise prices - lower	$21.68	$21.68	$21.68
Range of exercise prices - upper	$21.68	$21.58	$21.58
Weighted average remaining contractual life	'3 years 6 months	'4 years 6 months	'5 years 6 months
Fully vested options	30,112	30,112	24,087
Weighted average exercise price	$21.68	$21.68	$21.68
Aggregate intrinsic value (in dollars)	$190,437	$0	$0
Weighted average remaining contractual life (in years)	'3 years 6 months	'4 years 6 months	'5 years 6 months

Stock_Option_Plans_Detail

Stock Option Plans (Detail) (USD $)	12 Months Ended
Stock Option Plans (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Options Terms [Line Items]	'	'	'
Share-based compensation arrangement by share-based payment award, number of shares authorized (in shares)	133,657	'	'
Share-based compensation arrangement by share-based payment award, award vesting rights	'20%	'	'
Allocated share-based compensation expense (in dollars)	$328,000	$210,000	$293,000
Income tax benefit related to stock option exercises	354,000	30,000	0
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, stock options (in dollars)	$910,000	'	'
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition	'4 years	'	'
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate	1.35%	'	'
Share-based compensation arrangement by share-based payment award, fair value assumptions, risk free interest rate	2.55%	'	'
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected volatility rate	24.71%	'	'
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected term	'9 years 3 months 18 days	'	'
Share-based compensation arrangement by share-based payment award, options, grants in period, weighted average grant date fair value (in dollars per share)	$7.81	'	'
Exercisable Period \| Minimum	'	'	'
Share Based Compensation Options Terms [Line Items]	'	'	'
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average remaining contractual term	'1 year	'	'
Exercisable Period \| Maximum	'	'	'
Share Based Compensation Options Terms [Line Items]	'	'	'
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average remaining contractual term	'5 years	'	'
Years to Expiration after Grant Date	'	'	'
Share Based Compensation Options Terms [Line Items]	'	'	'
Share-based compensation arrangement by share-based payment award, terms of award	'10 years	'	'

Quarterly_Data_Unaudited_Detai

Quarterly Data (Unaudited) (Detail) - Summary of Quarterly Data (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Period [Line Items]	'	'	'
Interest income	$37,389	$33,588	$32,897
Interest expense	2,395	2,727	3,327
Net interest income	34,994	30,861	29,570
Provision for loan losses	1,385	1,833	1,750
Net interest income after provision for loan losses	33,609	29,028	27,820
Income before income taxes	8,764	10,448	5,825
Provision (benefit) for income taxes	1,325	1,645	1,568
Net earnings	7,439	8,803	4,257
Net earnings available to common shareholders	6,872	8,145	3,457
Basic earnings per share (in dollars per share)	$1.75	$2.10	$0.89
Diluted earnings per share (in dollars per share)	$1.71	$2.07	$0.89
First Quarter	'	'	'
Period [Line Items]	'	'	'
Interest income	9,397	7,882	'
Interest expense	682	684	'
Net interest income	8,715	7,198	'
Provision for loan losses	600	400	'
Net interest income after provision for loan losses	8,115	6,798	'
Non-interest income	976	1,920	'
Non-interest expense	7,739	7,053	'
Income before income taxes	1,352	1,665	'
Provision (benefit) for income taxes	422	377	'
Net earnings	930	1,288	803
Dividends and discount accretion on preferred stock	158	186	'
Net earnings available to common shareholders	772	1,102	'
Basic earnings per share (in dollars per share)	$0.20	$0.28	'
Diluted earnings per share (in dollars per share)	$0.19	$0.28	'
Second Quarter	'	'	'
Period [Line Items]	'	'	'
Interest income	9,358	7,878	'
Interest expense	639	653	'
Net interest income	8,719	7,225	'
Provision for loan losses	510	400	'
Net interest income after provision for loan losses	8,209	6,825	'
Non-interest income	1,092	1,415	'
Non-interest expense	7,385	6,498	'
Income before income taxes	1,916	1,742	'
Provision (benefit) for income taxes	537	514	'
Net earnings	1,379	1,228	1,180
Dividends and discount accretion on preferred stock	172	157	'
Net earnings available to common shareholders	1,207	1,071	'
Basic earnings per share (in dollars per share)	$0.31	$0.28	'
Diluted earnings per share (in dollars per share)	$0.30	$0.27	'
Third Quarter	'	'	'
Period [Line Items]	'	'	'
Interest income	9,259	8,361	'
Interest expense	560	663	'
Net interest income	8,699	7,698	'
Provision for loan losses	225	400	'
Net interest income after provision for loan losses	8,474	7,298	'
Non-interest income	978	4,764	'
Non-interest expense	6,950	6,631	'
Income before income taxes	2,502	5,431	'
Provision (benefit) for income taxes	-629	490	'
Net earnings	3,131	4,941	1,189
Dividends and discount accretion on preferred stock	118	158	'
Net earnings available to common shareholders	3,013	4,783	'
Basic earnings per share (in dollars per share)	$0.76	$1.23	'
Diluted earnings per share (in dollars per share)	$0.75	$1.21	'
Fourth Quarter	'	'	'
Period [Line Items]	'	'	'
Interest income	9,375	9,467	'
Interest expense	514	727	'
Net interest income	8,861	8,740	'
Provision for loan losses	50	633	'
Net interest income after provision for loan losses	8,811	8,107	'
Non-interest income	1,137	1,060	'
Non-interest expense	6,954	7,557	'
Income before income taxes	2,994	1,610	'
Provision (benefit) for income taxes	995	264	'
Net earnings	1,999	1,346	1,085
Dividends and discount accretion on preferred stock	119	157	'
Net earnings available to common shareholders	$1,880	$1,189	'
Basic earnings per share (in dollars per share)	$0.47	$0.31	'
Diluted earnings per share (in dollars per share)	$0.46	$0.30	'

Condensed_Financial_Informatio2

Condensed Financial Information of Parent Company (Detail) - Condensed Balance Sheet of Parent Company (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets:	'	'	'	'
Cash and due from banks	$14,007	$27,861	'	'
Other assets	14,418	14,177	'	'
Total assets	891,930	875,340	'	'
Liabilities:	'	'	'	'
Dividend declared	398	296	210	'
Total liabilities	797,681	779,982	'	'
Stockholders' equity	94,249	95,358	87,196	80,924
Total liabilities and stockholders' equity	891,930	875,340	'	'
Parent	'	'	'	'
Assets:	'	'	'	'
Cash and due from banks	981	512	'	'
Investments in subsidiary	93,005	94,768	'	'
Income tax receivable from subsidiary	49	49	'	'
Dividend receivable from subsidiary	398	296	'	'
Other assets	242	50	'	'
Total assets	94,675	95,675	'	'
Liabilities:	'	'	'	'
Dividend declared	398	296	'	'
Other liabilities	28	21	'	'
Total liabilities	426	317	'	'
Stockholders' equity	94,249	95,358	87,196	'
Total liabilities and stockholders' equity	$94,675	$95,675	'	'

Condensed_Financial_Informatio3

Condensed Financial Information of Parent Company (Detail) - Condensed Statement of Earnings (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income:	'	'	'
Total income	($69)	($77)	($571)
Expense:	'	'	'
Income tax expense/(benefit)	1,325	1,645	1,568
Income before equity in undistributed earnings of subsidiary	8,764	10,448	5,825
Net earnings	7,439	8,803	4,257
Net earnings available to common shareholders	6,872	8,145	3,457
Parent	'	'	'
Income:	'	'	'
Dividends from subsidiary	3,955	1,279	1,269
Total income	3,955	1,279	1,269
Expense:	'	'	'
Other expense	111	85	64
Total expense	111	85	64
Income before income taxes and equity in undistributed earnings of subsidiary	3,844	1,194	1,205
Income tax expense/(benefit)	'	-41	-2
Income before equity in undistributed earnings of subsidiary	3,844	1,235	1,207
Equity in undistributed earnings of subsidiary	3,595	7,568	3,050
Net earnings	7,439	8,803	4,257
Dividends and discount accretion on preferred stock	567	658	800
Net earnings available to common shareholders	$6,872	$8,145	$3,457

Condensed_Financial_Informatio4

Condensed Financial Information of Parent Company (Detail) - Condensed Statement of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Cash Flow Statements, Captions [Line Items]	'	'	'
Net earnings	$7,439	$8,803	$4,257
Net increase in other assets	-278	-3,177	1,832
Stock-based compensation expense	328	210	293
Cash flows from operating activities	14,647	9,068	10,262
Stock options exercised, including tax benefits of $191 in 2013, $30 in 2012, and none in 2011	1,067	151	11
Cash dividends on preferred stock series A, B, C	'	'	-545
Cash flows provided by financing activities	15,335	32,849	-7,767
Parent	'	'	'
Condensed Cash Flow Statements, Captions [Line Items]	'	'	'
Net earnings	7,439	8,803	4,257
Income tax (receivable from) subsidiary	'	-42	1
Options expense (payable to) receivable from subsidiary	'	'	-215
Net increase in other assets	-192	-31	'
Net increase in other liabilities	404	11	'
Undistributed earnings of subsidiary	-3,595	-7,568	-3,050
Stock-based compensation expense	328	210	293
Cash flows from operating activities	4,384	1,383	1,286
Repayment of capital purchase program	-3,150	'	-12,600
Small Business Lending Fund funds received	'	'	-12,600
Stock options exercised, including tax benefits of $191 in 2013, $30 in 2012, and none in 2011	1,258	181	11
Dividends on common stock	-1,456	-968	-568
Cash dividends on preferred stock series A, B, C	-567	-658	-545
Cash flows provided by financing activities	-3,915	-1,445	-1,102
Net (decrease) increase in cash	469	-62	184
Cash, beginning of year	512	574	390
Cash, end of year	$981	$512	$574

Condensed_Financial_Informatio5

Condensed Financial Information of Parent Company (Detail) - Condensed Statement of Cash Flows (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Cash Flow Statements, Captions [Line Items]	'	'	'
Stock options tax benefits	$354,000	$30,000	$0
Parent	'	'	'
Condensed Cash Flow Statements, Captions [Line Items]	'	'	'
Stock options tax benefits	$191,000	$30,000	'