National Commerce Inactive 10-K20 Feb 152014 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, 2014	Feb. 17, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Entity Registrant Name	NATIONAL COMMERCE CORPORATION
Entity Central Index Key	1609951
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		7,541,541
Entity Public Float			$0

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$14,236,000	$2,273,000
Interest-bearing deposits with banks	109,199,000	121,863,000
Cash and cash equivalents	123,435,000	124,136,000
Investment securities available-for-sale	34,932,000	47,979,000
Other investments	5,421,000	4,482,000
Mortgage loans held-for-sale	9,329,000	7,159,000
Loans, net of unearned income	888,721,000	582,002,000
Less: allowance for loan losses	9,802,000	9,119,000
Loans, net	878,919,000	572,883,000
Premises and equipment, net	27,560,000	16,181,000
Accrued interest receivable	2,193,000	1,430,000
Bank owned life insurance	10,641,000	8,247,000
Other real estate	1,008,000	845,000
Deferred tax assets, net	11,444,000	6,757,000
Goodwill	28,834,000
Other assets	2,953,000	1,682,000
Total assets	1,138,426,000	791,781,000
Deposits:
Noninterest-bearing demand	217,643,000	128,837,000
Interest-bearing demand	154,816,000	107,060,000
Savings and money market	392,394,000	304,071,000
Time	206,207,000	138,063,000
Total deposits	971,060,000	678,031,000
Federal Home Loan Bank advances	22,000,000	22,000,000
Accrued interest payable	431,000	476,000
Other liabilities	8,774,000	2,335,000
Total liabilities	1,002,265,000	702,842,000
Commitments
Shareholders' equity:
Preferred stock, 250,000 shares authorized, no shares issued or outstanding
Additional paid-in capital	131,455,000	91,774,000
Accumulated deficit	-3,453,000	-8,856,000
Accumulated other comprehensive income	845,000	291,000
Total shareholders' equity attributable to National Commerce Corporation	128,922,000	88,939,000
Noncontrolling interest	7,239,000
Total shareholders' equity	136,161,000	88,939,000
Total liabilities and shareholders' equity	1,138,426,000	791,781,000
Common Stock - Voting [Member]
Shareholders' equity:
Common stock	75,000	5,164,000
Common Stock - Non-Voting [Member]
Shareholders' equity:
Common stock		566,000
Core Deposits [Member]
Assets
Core deposit intangible, net	$1,757,000

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, shares authorized	250,000	250,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common Stock - Voting [Member]
Common stock, par value	0.01	1
Common stock, shares authorized	12,500,000	11,250,000
Common stock, shares issued	7,541,541	5,164,219
Common stock, shares outstanding	7,541,541	5,164,219
Common Stock - Non-Voting [Member]
Common stock, par value		1
Common stock, shares authorized		1,250,000
Common stock, shares issued		565,895
Common stock, shares outstanding		565,895

Consolidated_Statements_of_Ear

Consolidated Statements of Earnings (USD $)	12 Months Ended
Consolidated Statements of Earnings (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and dividend income:
Interest and fees on loans	$29,812,000	$21,642,000	$18,026,000
Interest and dividends on taxable investment securities	1,178,000	1,330,000	1,482,000
Interest on non-taxable investment securities	169,000	134,000	183,000
Interest on interest-bearing deposits and federal funds sold	183,000	206,000	261,000
Total interest income	31,342,000	23,312,000	19,952,000
Interest expense:
Interest on deposits	2,427,000	2,102,000	2,502,000
Interest on borrowings	442,000	511,000	778,000
Total interest expense	2,869,000	2,613,000	3,280,000
Net interest income	28,473,000	20,699,000	16,672,000
Provision for loan losses	978,000		125,000
Net interest income after provision for loan losses	27,495,000	20,699,000	16,547,000
Other income:
Service charges and fees on deposit accounts	714,000	630,000	535,000
Mortgage origination and fee income	3,752,000	4,035,000	3,254,000
Income from bank owned life insurance	242,000	236,000	194,000
Wealth management fees	58,000	89,000	103,000
Gain on other real estate	13,000	62,000	396,000
(Loss) gain on sale of investment securities available-for-sale	-33,000	47,000
Other	286,000	203,000	183,000
Total other income	5,032,000	5,302,000	4,665,000
Other expense:
Salaries and employee benefits	15,459,000	13,443,000	11,587,000
Occupancy and equipment	1,944,000	1,727,000	1,733,000
Core deposit intangible amortization	19,000
Other operating expense	6,032,000	4,515,000	4,764,000
Total other expense	23,453,000	19,685,000	18,084,000
Earnings before income taxes	9,074,000	6,316,000	3,128,000
Income tax expense	3,159,000	2,310,000	1,071,000
Net earnings	5,915,000	4,006,000	2,057,000
Less: Net earnings attributable to noncontrolling interest	512,000
Net earnings	5,403,000	4,006,000	2,057,000
Basic earnings per common share	$0.92	$0.70	$0.36
Diluted earnings per common share	$0.91	$0.69	$0.36
Core Deposits [Member]
Other expense:
Core deposit intangible amortization	$18,000

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net earnings	$5,403	$4,006	$2,057
Unrealized gains (losses) on investment securities available-for-sale:
Unrealized gains (losses) arising during the period, net of tax of $287, ($635) and $119, respectively	533	-1,180	222
Reclassification adjustment for losses (gains) included in net earnings, net of tax of $12 and ($17) in 2014 and 2013, respectively	21	-30
Other comprehensive income (loss)	554	-1,210	222
Comprehensive income	$5,957	$2,796	$2,279

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Unrealized (losses) gains arising during the period, net of taxes	$287	($635)	$119
Reclassification adjustment for (gains) losses included in net earnings, net of tax	$12	($17)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	Common Stock - Non-Voting [Member]
In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	Common Stock [Member]
Beginning balance, amount at Dec. 31, 2011	$83,459	$5,164	$91,369	($14,919)	$1,279		$566
Share-based compensation expense	112		112
Net earnings	2,057			2,057
Change in unrealized gain/loss on securities available-for- sale, net of tax	222				222
Ending balance, amount at Dec. 31, 2012	85,850	5,164	91,481	-12,862	1,501		566
Share-based compensation expense	293		293
Net earnings	4,006			4,006
Change in unrealized gain/loss on securities available-for- sale, net of tax	-1,210				-1,210
Ending balance, amount at Dec. 31, 2013	88,939	5,164	91,774	-8,856	291		566
Share-based compensation expense	358		358
Net earnings	5,403			5,403
Reclassification for Delaware reincorporation		-5,108	5,674				-566
Exercise of stock options and warrants	615	1	614
Sale of common stock, net of offering expenses of $28	2,972	2	2,970
Acquisition of United, net of offering expenses of $272	30,083	16	30,067
Initial noncontrolling interest	6,934					6,934
Net earnings attributable to noncontrolling interest	512					512
Distributions paid to noncontrolling interest	-207					-207
Share repurchase and retirement	-2		-2
Change in unrealized gain/loss on securities available-for- sale, net of tax	554				554
Ending balance, amount at Dec. 31, 2014	$136,161	$75	$131,455	($3,453)	$845	$7,239

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014
Common stock, offering expense	$28,000
Acquisition, offering expense	272,000
Common Stock [Member]
Common stock, offering expense	28,000
Acquisition, offering expense	272,000
Additional Paid-in Capital [Member]
Common stock, offering expense	28,000
Acquisition, offering expense	$272,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net earnings	$5,403	$4,006	$2,057
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Provision for loan losses	978		125
Net earnings attributable to noncontrolling interest	512
Depreciation, amortization and accretion	933	757	621
Loss (gain) on sale of investment securities available-for-sale	33	-47
Loss (gain) on ineffective portion of fair value hedge derivative	128	-16
Change in mortgage loan derivative	-18	-79
Deferred tax expense	552	1,901	1,000
Loss on trade or sale of premises and equipment	1
Share-based compensation expense	358	293	112
Income from bank owned life insurance	-242	-236	-194
Gain on other real estate	-13	-62	-396
Change in:
Mortgage loans held-for-sale	-2,170	6,677	-5,939
Other assets and accrued interest receivable	-1,321	134	184
Other liabilities and accrued interest payable	-486	-118	1,266
Net cash provided (used) by operating activities	4,648	13,210	-1,164
Cash flows from investing activities (net of effect of business combinations):
Proceeds from calls, maturities and paydowns of securities available-for-sale	5,386	11,206	10,651
Proceeds from sale of securities available-for-sale	35,377	952	0
Purchases of securities available-for-sale	-1,501	-21,225	-981
Proceeds from sale of other investments	427	113	315
Purchases of other investments	-160	-246	-634
Net cash received in acquisitions	20,170
Net change in loans	-75,195	-142,514	-142,155
Proceeds from sale of other real estate	65	329	1,546
Investment in bank owned life insurance			-3,000
Purchases of premises and equipment	-2,832	-4,076	-5,925
Net cash used by investing activities	-18,263	-155,461	-140,183
Cash flows from financing activities (net of effect of business combinations):
Net change in deposits	92,483	97,795	255,658
Proceeds from Federal Home Loan Bank advances			15,000
Repayment of Federal Home Loan Bank advances	-4,874	-2,500	-7,000
Repayment of short-term debt	-77,801
Cash distributions paid to noncontrolling interests	-207
Repayment of non-recourse debt		-195	-336
Stock repurchase	-2
Proceeds from stock offering	3,000
Stock offering expenses	-28
Stock offering expenses related to acquisition	-272
Proceeds from exercise of options and warrants	615
Net cash provided by financing activities	12,914	95,100	263,322
Net change in cash	-701	-47,151	121,975
Cash and cash equivalents at beginning of the period	124,136	171,287	49,312
Cash and cash equivalents at end of the period	123,435	124,136	171,287
Cash paid during the period for:
Interest	2,914	2,723	3,239
Income taxes	3,233	505	25
Non-cash investing and financing activities:
Change in unrealized gain on securities available-for-sale, net of tax	554	-1,210	222
Transfer of loans to other real estate		1,017	340
Transfer of premises held-for-sale to premises and equipment			3,014
Assets acquired and liabilities assumed in acquisition
Assets acquired in acquisitions	307,148
Liabilities assumed in acquisitions	$290,029

Summary_of_Significant_Account

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

-1

Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements include the accounts of National Commerce Corporation (the “Company”) and its wholly-owned banking subsidiaries, National Bank of Commerce (“NBC”) and United Legacy Bank (“ULB”), collectively, (the “Banks”). In addition to its banking subsidiaries, the Company’s consolidated financial statements include RBCF Holdings Inc., a non-banking subsidiary, as well as NBC’s majority-owned subsidiary, CBI Holding Company, LLC (“CBI”). The Banks provide a full range of commercial and consumer banking services throughout Alabama and Florida, including metropolitan Birmingham, Huntsville, Lee County and Baldwin County in Alabama. In addition to its Alabama locations, the Banks operate full-service banking offices in the greater Orlando area and in Vero Beach, Florida. NBC is primarily regulated by the Office of the Comptroller of Currency (“OCC”) and ULB’s primary regulator is the Florida Office of Financial Regulation (“FOFR”). The Banks undergo periodic examinations by these regulatory agencies. The Company is regulated by the Federal Reserve Bank (“FRB”) and is also subject to periodic examinations. CBI, which conducts business through its wholly-owned subsidiary, Corporate Billing LLC, is a transaction–based finance company headquartered in Decatur, Alabama that provides factoring, invoicing, collection and accounts receivable management services to transportation companies and automotive parts and service providers nationwide.

The accounting principles followed by the Company, and the method of applying these principles, conform with accounting principles generally accepted in the United States of America (“GAAP”) and with general practices within the banking industry. In preparing financial statements in conformity with GAAP, management is required to make estimates and assumptions that affect the reported amounts in the consolidated financial statements. Actual results could differ significantly from those estimates. Material estimates common to the banking industry that are particularly susceptible to significant change in the near term include, but are not limited to, the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, and valuation allowances associated with the realization of deferred tax assets, which are based on future taxable income.

Cash and Cash Equivalents

Cash equivalents include amounts due from banks, interest-bearing deposits with the Federal Reserve Bank of Atlanta (“FRB”), Federal Home Loan Bank (“FHLB”), correspondent banks, and federal funds sold. Generally, federal funds are sold for one-day periods. The Company is required to maintain average reserve balances with the FRB or in cash. At December 31, 2014 and 2013, the Company’s reserve requirements were approximately $2,436,000 and $15,322,000, respectively.

Investment Securities

The Company classifies its securities in one of three categories: trading, available-for-sale, or held-to-maturity. Trading securities are bought and held principally for the purpose of selling them in the near term. Held-to-maturity securities are those securities that the Company has the ability and intent to hold until maturity. All securities not included in trading or held-to-maturity are classified as available-for-sale. At December 31, 2014 and 2013, all securities are classified as available-for-sale.

Available-for-sale securities are recorded at fair value. Held-to-maturity securities are recorded at cost, adjusted for the amortization or accretion of premiums or discounts. Unrealized holding gains and losses, net of the related tax effect, on securities available-for-sale are excluded from earnings and are reported as a separate component of shareholders’ equity until realized. Transfers of securities between categories are recorded at fair value at the date of transfer.

Management evaluates investment securities for other-than-temporary impairment on a quarterly basis. A decline in the market value of any investment below cost that is deemed other-than-temporary is charged to earnings for the decline in value deemed to be credit related and a new cost basis in the security is established. The decline in value attributed to non-credit related factors is recognized in other comprehensive income.

Premiums and discounts are amortized or accreted over the life of the related securities as adjustments to the yield. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of securities sold.

Other Investments

Other investments include FRB stock, FHLB stock and other investments that do not have a readily determinable market value. These investments are carried at cost, which approximates fair value.

Loans and Allowance for Loan Losses

Loans are stated at the principal amount outstanding, net of the allowance for loan losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amount outstanding.

Nonrefundable loan fees and costs incurred for loans are deferred and recognized in income over the life of the loans.

A loan is considered impaired when, based on current information and events, it is probable that all amounts due according to the contractual terms of the loan agreement will not be collected. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, at the loan’s observable market price, or at the fair value of the collateral of the loan if the loan is collateral dependent. Accrual of interest is discontinued on a loan when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that collection of interest is doubtful. When a loan is placed on nonaccrual status, previously accrued and uncollected interest is charged to interest income on loans. Generally, payments on nonaccrual loans are applied to principal. When a borrower has demonstrated the capacity to service the debt for a reasonable period of time, management may elect to resume the accrual of interest on the loan.

The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when management believes that the collectibility of the principal is unlikely. The allowance represents an amount which, in management’s judgment, will be adequate to absorb probable losses on existing loans that may become uncollectible.

Management’s judgment in determining the adequacy of the allowance is based on evaluations of the collectibility of loans. These evaluations take into consideration such factors as changes in the nature and volume of the loan portfolio, current economic conditions that may affect the borrower’s ability to pay, overall portfolio quality, and review of specific problem loans.

Management believes that the allowance for loan losses is adequate. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in economic conditions. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to recognize additions to the allowance based on judgments that are different than those of management.

Transfers of Financial Assets

Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, i.e. put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.

Mortgage Loans Held-for-Sale

Mortgage loans held-for-sale are carried at the lower of aggregate cost or estimated market value. Gains and losses on loans held-for-sale are included in the determination of income for the period in which the sales occur. At December 31, 2014 and 2013, the cost of loans held-for-sale approximates the market value.

Premises and Equipment

Premises and equipment are stated at cost less accumulated depreciation. Major additions and improvements are charged to the property accounts while replacements, maintenance and repairs that do not improve or extend the life of the respective assets are expensed currently. When property is retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts and the resulting gain or loss, if any, is recognized. Depreciation expense is computed using the straight-line method over the following estimated useful lives:

Building and improvements

10 - 40 years

Furniture and equipment

5 - 10 years

Leasehold improvements

18 years

Computer equipment

3 years

Other Real Estate and Repossessed Assets

Other real estate represents properties acquired through or in lieu of loan foreclosure and is initially recorded at fair value less estimated disposal costs. Costs of improvements are capitalized, whereas costs relating to holding other real estate and valuation adjustments are expensed. Revenue and expenses from operations and changes in valuation allowance are included in net expenses from other real estate.

Business Combinations

The Company accounts for business combinations under the acquisition method of accounting in accordance with Accounting Standards Codification (“ASC”) 805, Business Combinations. The Company recognizes the full fair value of the assets acquired and liabilities assumed and immediately expenses transaction costs. There is no separate recognition of the acquired allowance for loan losses on the acquirer’s balance sheet as credit-related factors are incorporated directly into the fair value of the net tangible and intangible assets acquired. If the amount of consideration exceeds the fair value of assets purchased less the fair value of liabilities assumed, goodwill is recorded. Alternatively, if the amount by which the fair value of assets purchased exceeds the fair value of liabilities assumed and consideration paid, a gain (“bargain purchase gain”) is recorded. Fair values are subject to refinement for up to one year after the closing date of an acquisition as information relative to closing date fair values becomes available. Results of operations of the acquired business are included in the statement of income from the effective date of the acquisition. Additional information regarding acquisitions is provided in Note 2.

Goodwill and Intangible Assets

Goodwill represents the excess of cost over the fair value of the net assets purchased in business combinations. Goodwill is required to be tested annually for impairment or whenever events occur that may indicate that the recoverability of the carrying amount is not probable. In the event of an impairment, the amount by which the carrying amount exceeds the fair value is charged to earnings. The Company performs its annual test for impairment in the fourth quarter of each year.

Intangible assets consist of core deposit premiums acquired in connection with business combinations and are based on the established value of acquired customer deposits. The core deposit premium is initially recognized based on a valuation performed as of the consummation date and is amortized over an estimated useful life of three to ten years. Amortization periods are reviewed annually in connection with the annual impairment testing of goodwill.

Purchased Loans

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date. When the loans have evidence of credit deterioration since origination and it is probable at the date of acquisition that the Company will not collect all contractually required principal and interest payments, the difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the non-accretable difference. The Company must estimate expected cash flows at each reporting date. Subsequent decreases to the expected cash flows will generally result in a provision for loan losses. Subsequent increases in expected cash flows result in a reversal of the provision for loan losses to the extent of prior provisions and adjust accretable discount if no prior provisions have been made. This increase in accretable discount will have a positive impact on interest income. In addition, purchased loans without evidence of credit deterioration are also handled under this method.

Income Taxes

Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.

In the event the future tax consequences of differences between the financial reporting bases and the tax bases of the assets and liabilities results in deferred tax assets, an evaluation of the probability of being able to realize the future benefits indicated by such asset is required. A valuation allowance is provided for the portion of the deferred tax asset when it is more likely than not that some portion or all of the deferred tax asset will not be realized. In assessing the realizability of the deferred tax assets, management considers the scheduled reversals of deferred tax liabilities, projected future taxable income, and tax planning strategies.

The Company currently evaluates income tax positions judged to be uncertain. A loss contingency reserve is accrued if it is probable that the tax position will be challenged, it is probable that the future resolution of the challenge will confirm that a loss has been incurred, and the amount of such loss can be reasonably estimated.

Derivative Financial Instruments and Hedging Activities

In the normal course of business, the Company enters into derivative contracts to manage interest rate risk by modifying the characteristics of the related balance sheet instruments in order to reduce the adverse effect of changes in interest rates.

All derivatives are recognized on the balance sheet at their value in accordance with ASC 815, Accounting for Derivative Instruments and Hedging Activities. On the date the derivative contract is entered into, the Company designates the derivative as a hedge of fair value of a recognized asset or liability or of an unrecognized firm commitment. Changes in the fair value of a derivative that are highly effective, and that are designated and qualify as a fair value hedge, along with the loss or gain on the hedged asset or liability that is attributable to the hedged risk (including gains or losses on firm commitments), are recorded in current-period earnings.

The Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking various hedged transactions. This process includes linking all derivatives that are designated as fair value hedges to specific assets and liabilities on the balance sheet. The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in fair values of hedged items. When it is determined that a derivative is not highly effective as a hedge or that it has ceased to be a highly effective hedge, the Company discontinues hedge accounting prospectively, as discussed below.

The Company discontinues hedge accounting prospectively when (a) it is determined that the derivative is no longer effective in offsetting changes in the fair value of a hedged item; (b) the derivative expires or is sold, terminated, or exercised; (c) a hedged firm commitment no longer meets the definition of a firm commitment; or (d) management determines that designation of the derivative as a hedge instrument is no longer appropriate.

When hedge accounting is discontinued because it is determined that the derivative no longer qualifies as an effective fair value hedge, the derivative will continue to be carried on the balance sheet at its fair value, and the hedged asset or liability will no longer be adjusted for changes in fair value. When hedge accounting is discontinued because the hedged item no longer meets the definition of a firm commitment, the derivative will continue to be carried on the balance sheet at its fair value, and any asset or liability that was recorded pursuant to recognition of the firm commitment will be removed from the balance sheet and recognized as a gain or loss in current-period earnings. In all other situations in which hedge accounting is discontinued, the derivative will be carried at its fair value on the balance sheet, with changes in its fair value recognized in current-period earnings.

Mortgage Banking Derivative Commitments

In connection with its mortgage banking activities, the Company enters into loan commitments to fund residential mortgage loans at specified interest rates and within a specified period of time, generally up to 60 days from the time of the rate lock. A loan commitment related to a loan that will be held for sale upon funding is a derivative instrument under ASC 815, which must be recognized at fair value on the consolidated balance sheet in other assets and other liabilities with changes in its value recorded in income from mortgage banking operations.

To hedge the exposure of changes in interest rates impacting the fair value of loans held for sale and related loan commitments, the Company typically enters into forward sales commitments with its secondary market investors at the time a loan commitment is granted to lock in the ultimate sale and price of the loan. These commitments are generally on a best efforts basis. Accordingly, there are no material sales commitment derivative instruments.

As of December 31, 2014 and 2013, the fair value of the Company’s interest rate lock commitment derivatives was approximately $98,000 and $79,000, respectively, and is included in other assets in the accompanying consolidated balance sheets. The Company recognized income of $18,000 and $79,000 during the years ended December 31, 2014 and 2013, respectively. These amounts are included in mortgage origination and fee income in the consolidated statements of earnings. There were no material interest rate lock commitment derivatives outstanding at December 31, 2012.

Stock-Based Compensation

The Company accounts for its stock-based compensation plans using a fair value-based method of accounting, whereby compensation cost is measured at the grant date based on the value of the award and is recognized over the service period, which is usually the vesting period.

Accumulated Other Comprehensive Income

At December 31, 2014, 2013 and 2012, accumulated other comprehensive income consisted of net unrealized gains on investment securities available-for-sale.

Net Earnings per Common Share

Basic earnings per common share are computed by dividing net income by the weighted-average number of shares of common stock outstanding during the year. Diluted earnings per common share are computed by dividing net income by the effect of the issuance of potential common shares that are dilutive and by the sum of the weighted-average number of shares of common stock outstanding. Anti-dilutive potential common shares are excluded from the diluted earnings per share computation and totaled 30,000 during 2013 and 2012. In June 2014, these antidilutive securities were exercised and are included in common shares outstanding during 2014. The acquired United options are anti-dilutive and excluded from this calculation.

The reconciliation of the components of basic and diluted earnings per share is as follows:

2014

2013

2012

Net earnings available to common shareholders

5,403

4,006

2,057

Weighted average common shares outstanding

5,888,862

5,730,114

Dilutive effect of stock options

19,266

6,511

3,276

Dilutive effect of performance share awards

52,071

27,660

7,010

Diluted common shares

5,960,199

5,764,285

5,740,400

Basic earnings per common share

0.92

0.7

0.36

Diluted earnings per common share

0.91

0.69

0.36

Reclassifications

Certain 2013 and 2012 amounts have been reclassified to conform to the presentation used in 2014. These reclassifications had no material effect on the operations, financial condition or cash flows of the Company.

Recently Issued Accounting Pronouncements

In July 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes, which permits the Fed Funds Effective Swap Rate to be used as a U.S. benchmark interest rate for hedge accounting purposes, in addition to the U.S. Treasury and London Interbank Offered Rate. The ASU also amends previous rules by removing the restriction on using different benchmark rates for similar hedges. This amendment applies to all entities that elect to apply hedge accounting of the benchmark interest rate. The amendments in this ASU were effective for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The Company has adopted this update, although such adoption had no impact on its financial position or results of operations.

In July 2013, the FASB issued ASU No. 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, which provides that an unrecognized tax benefit, or a portion thereof, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except to the extent that a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date to settle any additional income taxes that would result from disallowance of a tax position, or the tax law does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, then the unrecognized tax benefit should be presented as a liability. These amendments in this ASU are effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2013. Early adoption and retrospective application is permitted. The Company has adopted this update, although such adoption had no impact on its financial position or results of operations.

In January 2014, the FASB issued ASU No. 2014-04, Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. These amendments are intended to clarify when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan should be derecognized and the real estate recognized. The amendments clarify 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 residential 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. Additional disclosures about such activities are required by these amendments. The amendments in this ASU become effective for public companies for annual periods and interim periods within those annual periods beginning after December 15, 2014, and early adoption is permitted. The Company is assessing the impact that these amendments will have on its financial position and results of operations, but does not currently anticipate that it will have a material impact.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). These amendments affect any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (e.g. insurance contracts or lease contracts). This ASU will supersede the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance, and creates a Topic 606, Revenue from Contracts with Customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. This ASU will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The ASU allows for either full retrospective or modified retrospective adoption. The Company is assessing the effects of this ASU, which exclude financial instruments from its scope, but does not anticipate that it will have a material impact on its financial position or results of operations.

In June 2014, the FASB issued ASU No. 2014-12, Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period. The amendments clarify the proper method of accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. This ASU requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition. The performance target should not be reflected in estimating the grant-date fair value of the award. Compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Earlier adoption is permitted. None of the Company’s share-based payment awards have service components, so the Company does not believe this ASU will have an impact on its financial position or results of operations.

In August 2014, the FASB issued ASU No. 2014-14, Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure. These amendments address the diversity in practice regarding the classification and measurement of foreclosed loans which were part of a government-sponsored loan guarantee program (e.g., HUD, FHA, VA). The ASU outlines certain criteria that, if met, require the loan (residential or commercial) should be derecognized and a separate other receivable should be recorded upon foreclosure at the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. This ASU will be effective for annual reporting periods beginning after December 15, 2014, including interim periods within that reporting period. Early adoption is permitted, provided the entity has adopted ASU 2014-04. The ASU should be adopted either prospectively or on a modified retrospective basis. The Company is assessing the impact that these amendments will have on its financial position and results of operations, but does not currently anticipate that it will have a material impact.

Business_Combinations

Business Combinations	12 Months Ended
Business Combinations	Dec. 31, 2014
Business Combinations [Abstract]
Business Combinations	-2	Business Combinations

	CBI Holding Company, LLC

	On August 29, 2014, NBC acquired 70% of the outstanding units of CBI, a receivables factoring business headquartered in Decatur, Alabama. CBI operates as a subsidiary of NBC. NBC has an option to purchase the remaining 30% interest for a purchase price based on a multiple of CBI’s earnings. The option is exercisable at any time beginning on August 29, 2019 and expires on August 29, 2022.



	The primary reasons for the purchase were to utilize a portion of the Company’s excess capital and liquidity in a highly profitable business line to enhance revenue production and to diversify its earnings base.

	The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations. NBC paid $16,181,000 in cash for a 70% interest in CBI. All of the assets and liabilities of CBI are included in the Company’s consolidated balance sheet. In connection with the acquisition, the Company recorded $23,115,000 of goodwill. For income tax purposes, this acquisition was treated as an asset purchase and deferred taxes have been established for the difference between book and tax basis of assets and liabilities where appropriate.

	Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information regarding closing date fair values becomes available. Given an average life for CBI’s receivables of 35 to 40 days, the assets and liabilities of CBI are very short term in nature and the book value was deemed to be the fair value, with the exception of a $174,000 discount on the purchased factored receivables, which was accreted into income during September 2014 in accordance with the average life of the related receivables.

	The table below summarizes the estimates of fair value of the assets purchased, including goodwill, and the liabilities assumed as of August 29, 2014.



			As of
			August 29, 2014
	Assets:
	Cash and cash equivalents		$	2,233
	Factored receivables			81,559
	Premises and equipment, net			444
	Other assets			157
	Goodwill			23,115

	Total assets			107,508

	Liabilities:
	Other liabilities			6,592
	Note payable			77,801

	Total liabilities			84,393

	Non controlling interest			6,934

	Purchase price		$	16,181


	United Group Banking Company of Florida, Inc.

	On December 15, 2014, the Company completed its acquisition of United Group Banking Company of Florida, Inc. (“United”), a bank holding company headquartered in Longwood, Florida. At that time, United’s wholly-owned non-banking subsidiary, RBCF Holdings Inc., became a wholly-owned subsidiary of the Company. United’s wholly-owned banking subsidiary, ULB, is expected to merge with and into NBC during the first quarter of 2015. ULB had a total of five banking locations located in the greater Orlando area as of December 31, 2014. Upon consummation of the acquisition, United was merged with and into the Company, with the Company as the surviving entity in the merger. United’s common shareholders were entitled to elect to receive either 0.057794 shares of the Company’s common stock, or $1.30 in cash in exchange for each share of United’s common stock, or a combination stock and cash. The total amount of cash paid by the Company for cash elections was capped at $2,950,000 in the merger agreement. The Company paid cash for cash elections and cash in lieu of fractional shares totaling $2,953,884 and issued 1,617,027 shares of the Company’s common stock. The aggregate estimated value of the consideration given was $33,309,000. The Company recorded $5,719,000 of goodwill, which is nondeductible for tax purposes, as this acquisition was a nontaxable transaction. Approximately $272,000 of direct stock issuance costs for the acquisition were incurred and charged against additional paid in capital and other acquisition expenses of approximately $368,000 were charged directly to other noninterest expenses.

	The acquisition of United was accounted for using the acquisition method of accounting in accordance with ASC 805, Business Combinations. Assets acquired, liabilities assumed and consideration exchanged were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities is a complicated process involving significant judgment regarding methods and assumptions used to calculate estimated fair values. Fair values are preliminary and subject to refinement for up to one year after the closing date of the acquisition as additional information regarding the closing date fair values becomes available.



	The following table presents the assets acquired and liabilities assumed of United as of December 15, 2014, at their initial fair value estimates:



			As Recorded			Fair Value				As Recorded
			By United			Adjustments				By the Company
	Cash and cash equivalents		$	37,072			—				37,072
	Investment securities			26,376			(966	) a			25,410
	Loans			154,334			(4,408	) b			149,926
	Allowance for loan losses			2,162			(2,162	) c			—

	Net loans			152,172			(2,246	)			149,926
	Premises and equipment, net			8,292			648	d			8,940
	Core deposit intangible			—			1,776	e			1,776
	Bank owned life insurance			2,151			—				2,151
	Other real estate and repossessions			818			(260	) f			558
Other assets			7,269			125	g			7,394

Total Assets		$	234,150			(923	)			233,227

										—
Non-interest bearing		$	50,007			—				50,007
Interest-bearing			150,539			—				150,539

Total Deposits			200,546			—				200,546
FHLB advances			4,865			9	h			4,874
Other liabilities			217			—				217

Total Liabilities			205,628			9				205,637

										—
Net identifiable assets acquired over liabilities assumed			28,522			(932	)			27,590
Goodwill			—			5,719				5,719

Net assets acquired over liabilities assumed		$	28,522			4,787				33,309

Consideration:
Shares of common stock issued			1,617,027
Estimated value per share of the Company’s stock		$	18.72

Fair value of Company stock issued			30,271
Cash exchanged for shares and cash in lieu			2,954
Value of assumed stock options			84

Fair value of total consideration transferred		$	33,309




Explanation of fair value adjustments


	a.	Adjustment reflects fair value adjustments of the available-for-sale portfolio at acquisition date.


	b.	Adjustment reflects the fair value adjustments based on the Company’s evaluation of the acquired loan portfolio.


	c.	Adjustment reflects the elimination of United’s allowance for loan losses.


	d.	Adjustment reflects the fair value adjustment on United’s main office location.


	e.	Adjustment reflects the recording of core deposit intangible asset.


	f.	Adjustment reflects the fair value adjustment based on the evaluation of the acquired other real estate and repossessed assets.


	g.	Adjustment to record the deferred tax asset created by purchase adjustments.


	h.	Adjustment reflects the fair value adjustment to the FHLB borrowings.

The discounts on loans will be accreted to interest income over the estimated average life of the loans using the level yield method. The core deposit intangible asset is being amortized over a seven-year life on an accelerated basis.

The following unaudited supplemental pro forma information is presented to show estimated results assuming CBI and United were acquired as of the beginning of each period presented. These unaudited pro forma results are not necessarily indicative of the operating results that the Company would have achieved had it completed the acquisition as of January 1, 2013 or 2014 and should not be considered as representative of future operating results.



		For The Year Ended
		December 31,
		2014			2013
Net interest income - pro forma (unaudited)		$	42,281		$	36,073
Net earnings - pro forma (unaudited)		$	7,166		$	5,401
Diluted earnings per common share (unaudited)		$	0.96		$	0.73

In many cases, determining the fair value of the acquired assets and assumed liabilities requires the Company to estimate cash flows expected to result from those assets and liabilities and to discount those cash flows at appropriate rates of interest. The most significant of those determinations is related to the fair valuation of acquired loans. Acquired loans are initially recorded at their acquisition date fair values. The carryover of the allowance for loan losses is prohibited, as any credit losses in the loans are included in the determination of the fair value of the loans at the acquisition date. Fair values for acquired loans are based on a discounted cash flow methodology that involves assumptions including the remaining life of the acquired loans, estimated prepayments, estimated value of the underlying collateral and net present value of cash flows expected to be collected. Acquired loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that the acquirer will be unable to collect all contractually required payments are specifically identified and analyzed. The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized in interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the non-accretable discount. The non-accretable discount represents estimated future credit losses expected to be incurred over the life of the loan.

Loans at the acquisition date are presented in the following table.



		Acquired			Acquired				Total
		Impaired			Performing				Acquired
		Loans			Loans				Loans
Commercial, financial, and agricultural		$	929			22,274				23,203
Real estate - mortgage			6,844			105,361				112,205
Real estate - construction			918			7,377				8,295
Consumer			336			5,887				6,223

Total		$	9,027			140,899				149,926


The following table presents information about the purchased credit-impaired loans at acquisition.



Contractually required principal and interest payments		$	11,956
Non-accretable difference			2,929

Cash flows expected to be collected			9,027
Accretable discount			—

Fair value of loans acquired with a deterioration of credit quality		$	9,027


The following table presents changes in the carrying amount of the accretable yield on acquired loans for the year ended December 31, 2014. The Company had no acquisitions prior to the year ended December 31, 2014.



		2014
Balance, beginning of year		$	—
Acquisition of United			1,480
Accretion			(13	)
Net transfers from non-accretable difference to accretable yield			—

Balance, end of year		$	1,467

Investment_Securities

Investment Securities	12 Months Ended
Investment Securities	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities	-3	Investment Securities

	Investment securities available-for-sale at December 31, 2014 and 2013 are as follows:



						Gross		Gross		Estimated
			Amortized			Unrealized		Unrealized		Fair
	December 31, 2014		Cost			Gains		Losses		Value
	U.S. Treasury securities		$	1,501			—		—		1,501
	Mortgage-backed securities			27,723			1,138		111		28,750
	Municipal securities			4,408			279		6		4,681

	Total investment securities available-for-sale		$	33,632			1,417		117		34,932


						Gross		Gross		Estimated
			Amortized			Unrealized		Unrealized		Fair
	December 31, 2013		Cost			Gains		Losses		Value
	Mortgage-backed securities		$	33,123			1,022		403		33,742
	Municipal securities			4,409			59		198		4,270
	Mutual fund			10,000			—		33		9,967

	Total investment securities available-for-sale		$	47,532			1,081		634		47,979




	Management evaluates securities for other-than-temporary impairment on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer and (3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value.

	Details concerning investment securities with unrealized losses as of December 31, 2014 and 2013 are as follows:



			December 31, 2014
			Less than 12 Months					12 Months or More				Total
			Fair			Unrealized		Fair		Unrealized		Fair		Unrealized
			Value			Losses		Value		Losses		Value		Losses
	U.S. Treasury securities		$	—			—		—		—		—		—
	Mortgage-backed securities			—			—		7,705		111		7,705		111
	Municipal securities			—			—		494		6		494		6

			$	—			—		8,199		117		8,199		117


			31-Dec-13
			Less than 12 Months					12 Months or More				Total
			Fair			Unrealized		Fair		Unrealized		Fair		Unrealized
			Value			Losses		Value		Losses		Value		Losses
	Mortgage-backed securities		$	8,409			403		—		—		8,409		403
	Municipal securities			2,086			198		—		—		2,086		198
	Mutual fund			9,967			33		—		—		9,967		33

			$	20,462			634		—		—		20,462		634


	At December 31, 2014, three out of thirteen mortgage-backed securities and one out of nine municipal securities were in a loss position. At December 31, 2013, three out of fourteen mortgage-backed securities, four out of nine municipal securities and the sole mutual fund were in a loss position. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and industry analysts’ reports. As management had the ability and intent to hold debt securities until maturity, no declines were deemed to be other than temporary as of December 31, 2014 and 2013.

	During 2014, the Company sold investment securities for proceeds of $35,377,000 and realized a gross loss of $33,000 on those sales. During 2013, the Company sold investment securities for proceeds of $952,000 and realized a gross gain of $47,000 on those sales. During 2012, the Company did not sell any investment securities.

	At December 31, 2014 and 2013, securities with a carrying value of approximately $34,633,000 and $35,206,000, respectively, were pledged to secure public deposits as required by law and for other purposes.

	The amortized cost and estimated fair value of securities available-for-sale at December 31, 2014, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties.



		Amortized			Fair
		Cost			Value
Municipal & U.S. Treasury securities:
0 to 5 years		$	1,501			1,501
5 to 10 years			1,047			1,101
Over 10 years			3,361			3,580
Mortgage-backed securities			27,723			28,750

		$	33,632			34,932

Loans

Loans	12 Months Ended
Loans	Dec. 31, 2014
Receivables [Abstract]
Loans	-4	Loans

	Major classifications of loans at December 31, 2014 and 2013 are summarized as follows:



			2014				2013
	Commercial, financial, and agricultural		$	131,657				115,005
	Factored commercial receivables			82,600				—
	Real estate - mortgage			577,268				403,053
	Real estate - construction			83,663				58,372
	Consumer			13,962				6,113
	Leases			—				6

				889,150				582,549
	Less: Unearned fees			429				547

	Total loans and leases			888,721				582,002
	Allowance for loan losses			(9,802	)			(9,119	)

	Total net loans and leases		$	878,919				572,883


	The Banks grant loans and extensions of credit to individuals and a variety of businesses located in their general trade areas throughout Alabama and Florida, including metropolitan Birmingham, Huntsville, Lee County and Baldwin County in Alabama and metropolitan Orlando and Vero Beach in Florida. Through CBI, the Company also purchases receivables from transportation companies and automotive parts and service providers nationwide. Although the Banks have a diversified loan portfolio, a substantial portion of the loan portfolio is collateralized by improved and unimproved real estate and is dependent upon the real estate market. Portfolio segments utilized by the Banks are identified below. Relevant risk characteristics for these portfolio segments generally include debt service coverage, loan-to-value ratios and financial performance on non-consumer loans and credit scores, debt-to-income, collateral type and loan-to-value ratios for consumer loans.

	The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2014, 2013 and 2012. The acquired loans are not included in the allowance for loan losses calculation, as these loans are recorded at fair value and there has been no further indication of credit deterioration that would require an additional provision.



			Commercial,				Factored
			financial, and				Commercial				Real estate -				Real estate -
			agricultural				receivables				mortgage				Construction				Consumer			Leases				Unallocated				Total
	Balance, December 31, 2014
	Balance, beginning of year		$	1,398				—				4,449				964				243			—				2,065				9,119
	Provisions charged to operating expense			61				978				988				(350	)			298			—				(997	)			978
	Loans charged off			(3	)			(656	)			(429	)			—				—			—				—				(1,088	)
	Recoveries			67				633				39				33				21			—				—				793

	Balance, end of year		$	1,523				955				5,047				647				562			—				1,068				9,802

	Ending balance, individually evaluated for impairment		$	—				473				350				50				—			—				—				873
	Ending balance, collectively evaluated for impairment			1,523				482				4,697				597				562			—				1,068				8,929
	Loans:
	Individually evaluated for impairment		$	—				1,605				2,078				198				—			—				—				3,881
	Collectively evaluated for impairment		$	130,656				80,995				568,363				82,551				13,627			—				—				876,192
	Acquired loans with deteriorated credit quality		$	1,001				—				6,827				914				335			—				—				9,077



			Commercial,				Factored
			financial, and				Commercial				Real estate -				Real estate -
			agricultural				receivables				mortgage				Construction				Consumer			Leases				Unallocated				Total
	Balance, December 31, 2013
	Balance, beginning of year		$	1,158				—				5,093				497				170			3				3,099				10,020
	Provisions charged to operating expense			(47	)			—				864				162				58			(3	)			(1,034	)			—
	Loans charged off			(32	)			—				(1,557	)			—				—			—				—				(1,589	)
	Recoveries			319				—				49				305				15			—				—				688

	Balance, end of year		$	1,398				—				4,449				964				243			—				2,065				9,119

	Ending balance, individually evaluated for impairment		$	—				—				—				—				—			—				—				—
	Ending balance, collectively evaluated for impairment		$	1,398				—				4,449				964				243			—				2,065				9,119
	Loans:
	Individually evaluated for impairment		$	27				—				3,344				—				—			—				—				3,371
Collectively evaluated for impairment		$	114,978				—				399,709				58,372				6,113			6				—				579,178

		Commercial,				Factored
		financial, and				Commercial				Real estate -				Real estate -
		agricultural				receivables				mortgage				Construction				Consumer			Leases				Unallocated				Total
Balance, December 31, 2012
Balance, beginning of year		$	1,423				—				5,509				1,071				90			29				2,221				10,343
Provisions charged to operating expense			(435	)			—				(397	)			(303	)			408			(25	)			877				125
Loans charged off			(41	)			—				(409	)			(1,292	)			(372	)		—				—				(2,114	)
Recoveries			211				—				391				1,021				43			—				—				1,666

Balance, end of year		$	1,158				—				5,094				497				169			4				3,098				10,020

Ending balance, individually evaluated for impairment		$	—				—				—				—				—			—				—				—
Ending balance, collectively evaluated for impairment		$	1,158				—				5,094				497				169			4				3,098				10,020
Loans:
Individually evaluated for impairment		$	—				—				244				—				—			—				—				244
Collectively evaluated for impairment		$	92,147				—				302,873				36,267				10,030			413				—				441,730



The Banks individually evaluate for impairment all loans that are on nonaccrual status. Additionally, all troubled debt restructurings are individually evaluated for impairment. A loan is considered impaired when, based on current events and circumstances, it is probable that all amounts due according to the contractual terms of the loan will not be collected. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, at the loan’s observable market price, or the fair value of the collateral if the loan is collateral-dependent. Management may also elect to apply an additional collective reserve to groups of impaired loans based on current economic or market factors. Interest payments received on impaired loans are generally applied as a reduction of the outstanding principal balance. During 2014 and 2013, the Banks did not modify any loans that would be considered a troubled debt restructuring.

The following tables present impaired loans by class of loans as of December 31, 2014 and 2013. The purchased credit-impaired loans are not included in these tables because they are carried at fair value and accordingly have no related associated allowance.



						Unpaid								Average
		Recorded				Principal				Related				Recorded
December 31, 2014		Investment				Balance				Allowance				Investment
Impaired loans without related allowance:
Commercial, financial, and agricultural		$	—				—				—				24
Factored commercial receivables			—				—				—				—
Real estate - mortgage			1,052				2,030				—				1,770
Real estate - construction			—				—				—				—
Consumer			—				—				—				—
Leases			—				—				—				—

Total		$	1,052				2,030				—				1,794

Impaired loans with related allowance:
Commercial, financial, and agricultural		$	—				—				—				—
Factored commercial receivables			1,605				1,605				473				321
Real estate - mortgage			1,026				1,026				350				205
Real estate - construction			198				198				50				40
Consumer			—				—				—				—
Leases			—				—				—				—

Total		$	2,829				2,829				873				566

Total impaired loans:
Commercial, financial, and agricultural		$	—				—				—				24
Factored commercial receivables			1,605				1,605				473				321
Real estate - mortgage			2,078				3,056				350				1,975
Real estate - construction			198				198				50				40
Consumer			—				—				—				—
Leases			—				—				—				—

Total		$	3,881				4,859				873				2,360


						Unpaid								Average
		Recorded				Principal				Related				Recorded
December 31, 2013		Investment				Balance				Allowance				Investment
Impaired loans without related allowance:
Commercial, financial, and agricultural		$	27				236				—				2
Real estate - mortgage			3,344				4,429				—				2,075
Real estate - construction			—				—				—				—
Consumer			—				—				—				—
Leases			—				—				—				—

Total		$	3,371				4,665				—				2,077


For the years ended December 31, 2014, 2013 and 2012, the Banks did not recognize a material amount of interest income on impaired loans.

During 2009, NBC purchased certain loans that had evidence of credit deterioration since origination, and management has determined that it is probable that they will not collect all contractually-required principal and interest payments. These loans were purchased at a discount, and this discount has been deemed a non-accretable difference, as it represents management’s estimate of the difference between the contractually required payments at acquisition and the cash flows expected to be collected over the respective lives of the loans. Subsequent decreases to the expected cash flows will generally result in a provision for loan losses. Subsequent increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges or a reversal of the non-accretable difference with a positive impact on interest income. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized in interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of such cash flows. The principal balance of the remaining loan was approximately $378,000 and $402,000 as of December 31, 2014 and 2013, respectively, and the non-accretable discount was approximately $71,000 at December 31, 2014 and 2013.

The following tables present the aging of the recorded investment in past due loans and non-accrual loan balances as of December 31, 2014 and 2013 by class of loans. All loans greater than 90 days past due are placed on non-accrual status, excluding factored receivables. For CBI’s factored receivables, which are commercial trade credit rather than promissory notes, our practice is to charge off unpaid recourse receivables when they become 90 days past due from the invoice due date and the non-recourse receivables at 120 days past due from the statement billing date. For the recourse receivables, the invoice is charged against the client reserve account established for such purposes, unless the client reserve is insufficient, at which point it is charged against loans.



		30-59 Days				60-89 Days				> 90 Days				Total
December 31, 2014		Past Due				Past Due				Past Due				Past Due				Current			Total				Non-accrual
Commercial, financial, and agricultural		$	—				—				—				—				131,657			131,657				—
Factored commercial receivables			6,327				1,013				217				7,557				75,043			82,600				—
Real estate - mortgage			191				1,963				1,572				3,726				573,542			577,268				4,133
Real estate - construction			198				—				—				198				83,465			83,663				676
Consumer			188				—				132				320				13,642			13,962				56
Leases			—				—				—				—				—			—				—

Total		$	6,904				2,976				1,921				11,801				877,349			889,150				4,865


		30-59 Days				60-89 Days				> 90 Days				Total
December 31, 2013		Past Due				Past Due				Past Due				Past Due				Current			Total				Non-accrual
Commercial, financial, and agricultural		$	—				—				—				—				115,005			115,005				27
Real estate - mortgage			343				—				2,579				2,922				400,131			403,053				3,344
Real estate - construction			—				—				—				—				58,372			58,372				—
Consumer			—				—				—				—				6,113			6,113				—
Leases			—				—				—				—				6			6				—

Total		$	343				—				2,579				2,922				579,627			582,549				3,371


The Banks categorize loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as current financial information, historical payment experience, credit documentation, public information and current economic trends, among other factors. The Banks analyze loans individually by classifying the loans as to credit risk. This analysis is performed on a continuous basis. The Banks use the following definitions for their risk ratings:

Other Assets Especially Mentioned (“OAEM”): Weakness exists that could cause future impairment, including the deterioration of financial ratios, past due status and questionable management capabilities. Collateral values generally afford adequate coverage but may not be immediately marketable.

Substandard: Specific and well-defined weaknesses exist that may include poor liquidity and deterioration of financial ratios. The loan may be past due and related deposit accounts experiencing overdrafts. Immediate corrective action is necessary.

Doubtful: Specific weaknesses characterized as Substandard that are severe enough to make collection in full unlikely. There is no reliable secondary source of full repayment. Loans classified as doubtful will usually be placed on non-accrual, analyzed and fully or partially charged off based on a review of any collateral and other relevant factors.

Loss: Specific weakness characterized as Doubtful that are severe enough to be considered uncollectible and of such minimal value that its continuance as an asset is not warranted.

Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be “Pass” rated loans. As of December 31, 2014 and 2013, and based on the most recent analyses performed, the risk category of loans by class of loans is as follows:



December 31, 2014		Pass				OAEM				Substandard				Doubtful				Total
Commercial, financial, and agricultural		$	129,314				1,159				1,184				—				131,657
Factored commercial receivables			80,995				—				—				1,605				82,600
Real estate - mortgage			565,992				4,057				2,803				4,416				577,268
Real estate - construction			82,552				94				254				763				83,663
Consumer			13,192				201				477				92				13,962
Leases			—				—				—				—				—

Total		$	872,045				5,511				4,718				6,876				889,150


December 31, 2013		Pass				OAEM				Substandard				Doubtful				Total
Commercial, financial, and agricultural		$	111,828				1,257				1,893				27				115,005
Real estate - mortgage			392,568				3,829				3,312				3,344				403,053
Real estate - construction			58,372				—				—				—				58,372
Consumer			6,113				—				—				—				6,113
Leases			6				—				—				—				6

Total		$	568,887				5,086				5,205				3,371				582,549

Premises_and_Equipment

Premises and Equipment	12 Months Ended
Premises and Equipment	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	-5	Premises and Equipment

	Major classifications of premises and equipment as of December 31, 2014 and 2013 are summarized as follows:



			2014		2013
	Land		$	11,389		3,205
	Building and improvements			12,525		6,500
	Furniture and equipment			5,854		2,904
	Leasehold improvement			3,045		2,377
	Construction in process			1,348		4,136
	Automobile			53		—

				34,214		19,122
	Less accumulated depreciation			6,654		2,941

			$	27,560		16,181


	Depreciation expense amounted to approximately $836,000, $737,000 and $553,000 in 2014, 2013 and 2012, respectively.

Deposits

Deposits	12 Months Ended
Deposits	Dec. 31, 2014
Banking and Thrift [Abstract]
Deposits	-6	Deposits

	Time deposits greater than or equal to $250,000 totaled approximately $85,302,000 and $86,491,000 as of December 31, 2014 and 2013, respectively.

	At December 31, 2014, contractual maturities of time deposits are summarized as follows:



	2015		$	107,492
	2016			45,383
	2017			30,051
	2018			16,414
	2019			6,867

			$	206,207


	As of December 31, 2014, there was one customer with approximately $66,411,000 in deposits, or 7% of total deposits. As of December 31, 2013, there were two customers with approximately $72,250,000 in aggregate deposits, or 11% of total deposits.

	At December 31, 2014, the Company had outstanding brokered certificates of deposits of $48,935,000 with an average weighted rate of 0.81%. The Company had no outstanding brokered certificates of deposits at December 31, 2012.

Federal_Home_Loan_Bank_Advance

Federal Home Loan Bank Advances and Borrowings	12 Months Ended
Federal Home Loan Bank Advances and Borrowings	Dec. 31, 2014
Banking and Thrift [Abstract]
Federal Home Loan Bank Advances and Borrowings	-7	Federal Home Loan Bank Advances and Borrowings

	At December 31, 2014 and 2013, the Company had advances outstanding from the FHLB that are summarized as follows:



	Advance		Interest Basis	Current Rate	Maturity	Call or
	Advance		Interest Basis	Current Rate	Maturity	Conversion Date
	$	2,000	Fixed	4.06%	February 1, 2019	N/A
		15,000	Fixed	1.04%	January 26, 2016	N/A
		5,000	Fixed	3.96%	July 2, 2018	N/A

	$	22,000


	As of December 31, 2014, the Company had outstanding unfunded standby letters of credit with the FHLB totaling $98,345,000.

	The Company had pledged under blanket floating liens approximately $471,481,000 and $409,911,000 in residential first mortgage loans, home equity lines of credit, commercial real estate loans, and loans secured by multi-family real estate as security for these advances and letters and possible future advances as of December 31, 2014 and 2013, respectively. The value of the pledged collateral, when using appropriate discount percentages as prescribed by the FHLB, equals or exceeds the advances and unfunded standby letters of credit outstanding. At December 31, 2014, the Company had approximately $111,032,000 in additional borrowing capacity under its borrowing arrangement with the FHLB.

	The Company had available lines of credit for overnight borrowings totaling $84,600,000 at December 31, 2014.

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	-8	Income Taxes

	The components of income tax expense for the years ended December 31, 2014, 2013 and 2012 are as follows:



			2014			2013			2012
	Current		$	2,607			409			71
	Deferred			28			550			(240	)
	Expense of operating loss carryforwards			536			1,351			1,240
	Change in valuation allowance			(12	)		—			—

			$	3,159			2,310			1,071


	The difference between income tax expense and the amount computed by applying the statutory federal income tax rate to income before taxes for the years ended December 31, 2014, 2013 and 2012 is as follows:



			2014			2013			2012
	Pretax income at statutory rate		$	3,085			2,147			1,064
	State income tax expense, net			224			251			125
	Cash surrender value income			(83	)		(80	)		(66	)
	Tax exempt interest			(65	)		(56	)		(68	)
	Minority interest			(174	)		—			—
	Merger related expenses			111			—			—
	Change in valuation allowance			(12	)		—			—
	Other			73			48			16

			$	3,159			2,310			1,071


	The following summarizes the components of deferred taxes at December 31, 2014 and 2013.



			2014			2013
	Deferred income tax assets:
	Loans and allowance for loan losses		$	4,471			2,501
	Accrued expenses			106			107
	Operating loss carryforwards and credits			7,037			3,260
	Premises and equipment			283			672
	Capital loss carryforward			—			14
	Non-accrual interest income			31			75
	Stock-based compensation			479			347
	Other real estate			99			32
	Investment in pass through entity			208			—
	Other			157			164

	Total gross deferred income tax assets			12,871			7,172
	Less valuation allowance			—			(12	)

	Net deferred income tax assets			12,871			7,160
	Deferred income tax liabilities:
	Unrealized gains on investment securities available-for-sale			455			156
	Prepaid expenses			182			154
	Core deposit intangible			668			—
	Goodwill			122			—
	Leases			—			93

	Total gross deferred income tax liabilities			1,427			403

	Net deferred income tax assets		$	11,444			6,757


As of December 31, 2014, the Company has net operating loss carryforwards totaling approximately $18,850,000 for federal taxes and $12,300,000 for state taxes that will begin to expire in 2029 and 2024 for federal and state taxes, respectively, unless previously utilized. The federal operating loss carryforwards are subject to limitation under Internal Revenue Code §382, but are expected to be utilized within the carryforward period. A majority of the state net operating loss carryforwards are also subject to limitation under Internal Revenue Code §382. These net operating losses are also expected to be utilized during the carryforward period.

Commitments

Commitments	12 Months Ended
Commitments	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments	-9	Commitments

	The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the balance sheet. The contract amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments.

	The exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments.

	In most cases, the Company requires collateral or other security to support financial instruments with credit risk.



			December 31,
			2014		2013
	Financial instruments whose contract amounts represents credit risk:
	Commitments to extend credit		$	182,820		141,887
	Stand-by and performance letter of credit		$	8,085		4,066



	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 may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained upon an extension of credit, if deemed necessary by the Company, is based on management’s credit evaluation. The type of collateral held varies but may include unimproved and improved real estate, certificates of deposit, or personal property.

	Standby and performance letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to local businesses. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.

	The Company has entered into operating lease agreements for eight branch locations. At December 31, 2014, seven locations are open and one location is scheduled to open in February 2015. Total rent expense for 2014, 2013 and 2012 was approximately $445,000, $457,000 and $494,000, respectively. Future minimum rent on operating leases as of December 31, 2014 is as follows:



	Year ending December 31,
	2015		$	739
	2016			388
	2017			311
	2018			192
	2019			—
	Thereafter			—

			$	1,630


	In the normal course of business, the Company may be named as defendant in certain litigation. Some of these matters may claim substantial damages. After consultation with outside legal counsel, management believes that resolution of these issues will not result in material adverse effect on the Company’s financial position or results of operations.

Derivative_Financial_Instrumen

Derivative Financial Instruments and Hedging Transactions	12 Months Ended
Derivative Financial Instruments and Hedging Transactions	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Transactions	-10	Derivative Financial Instruments and Hedging Transactions

	The Company is exposed to certain risks relating to its ongoing business operations. The primary risk managed by using derivative instruments is interest rate risk. Interest rate swaps are entered into to manage interest rate risk associated with certain of the Company’s fixed-rate loans. The Company has also entered into interest rate swap contracts with certain of its customers. To hedge the associated risk, the Company has entered into reciprocal interest rate swap agreements with a third party.

	ASC 815, Derivatives and Hedging, requires companies to recognize all derivative instruments as either assets or liabilities at fair value on the balance sheet. As of December 31, 2014 and 2013, the approximate fair values and notional amounts of the Company’s derivative instruments, as well as their location on the consolidated balance sheet, are included in the table below.



	December 31, 2014		Balance Sheet	Fair Value			Notional
	December 31, 2014		Location	Fair Value			Amount
	Interest rate swaps designated as fair value hedges		Other Liabilities	$	(417	)		16,674
	Interest rate swaps with customers		Other Liabilities	$	(7	)		9,646
	Reciprical interest rate swaps		Other Assets	$	7			9,646

	December 31, 2013		Balance Sheet	Fair Value			Notional
	December 31, 2013		Location	Fair Value			Amount
	Interest rate swaps designated as fair value hedges		Other Assets	$	62			17,264
	Interest rate swaps with customers		Other Liabilities	$	(352	)		10,018
	Reciprical interest rate swaps		Other Assets	$	352			10,018



	During the year ended December 31, 2014, the Company recognized a loss of approximately $128,000 related to the ineffective portion of derivatives designated as fair value hedges. During the year ended December 31, 2013, the Company recognized a gain of approximately $16,000 related to the ineffective portion of derivatives designated as fair value hedges. The gain and loss are included in other income on the consolidated statement of earnings. There were no gains or losses recognized on fair value hedges during the year ended December 31, 2012.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2014
Postemployment Benefits [Abstract]
Employee Benefit Plans	-11	Employee Benefit Plans

	Equity Incentive Plan

	During 2011, the Company adopted the National Commerce Corporation 2011 Equity Incentive Plan (the “2011 Equity Incentive Plan”). The 2011 Equity Incentive Plan was adopted to provide a means of enhancing and encouraging the recruitment and retention of individuals on whom the success of the Company depends. The 2011 Equity Incentive Plan provides for the grant of stock options, phantom stock, performance awards and restricted and unrestricted stock awards. A total of 500,000 shares were reserved for possible issuance under the plan.

	The Company did not issue any stock options during 2014, 2013 or 2012, but during 2014 did assume 102,586 options in the acquisition of United.

	A summary of activity in the outstanding stock options for the years ended December 31, 2014, 2013 and 2012 is presented below:



			2014					2013				2012
						Weighted				Weighted				Weighted
						Average				Average				Average
						Exercise				Exercise				Exercise
			Shares			Price		Shares		Price		Shares		Price
	Outstanding, beginning of year			220,500		$	14.57		220,500	$	14.57		220,500	$	14.57
	Granted			—			—		—		—		—		—
	Assumed			102,586			23.45		—		—		—		—
	Exercised			(1,000	)		14.57		—		—		—		—
	Forfeited			—			—		—		—		—		—

	Oustanding, end of year			322,086		$	17.4		220,500	$	14.57		220,500	$	14.57

	Exercisable, end of year			322,086		$	17.4		220,500	$	14.57		220,500	$	14.57


	The options outstanding and exercisable at December 31, 2014 have a weighted average remaining contractual life of approximately six years. As of December 31, 2014, there was no unrecognized compensation expense, as all stock options immediately vested or the assumed options vested at the date of acquisition. No compensation expense related to stock options was recognized in 2014, 2013 or 2012.

	During 2014, 2013 and 2012, the Company granted certain key employees performance share awards under the 2011 Equity Incentive Plan. The awards will vest over five years and the number of shares ultimately awarded is both fixed and variable. Some grants vest over time and ultimate the payout is fixed. Other awards are based on factors such as loan production and the Company’s performance relative to peers over time using metrics such as net income and asset quality. The Company will record total compensation expense equal to the amount of shares it expects to pay out at the end of the award period over the associated vesting period. The Company recognized $358,000, $293,000 and $112,000 in compensation expense related to performance share awards during 2014, 2013 and 2012, respectively. As of December 31, 2014, there was approximately $756,000 of unrecorded compensation expense related to the performance share awards.



	Defined Contribution Plan

	The Company sponsors a 401(k) savings plan under which eligible employees may choose to save up to 15% of salary income on a pre-tax or after-tax basis, subject to certain Internal Revenue Service limits. Effective January 1, 2013, the Company amended the plan to include a matching employer contribution equal to 50% of the first 3% deferred by eligible participants. During 2014 and 2013, the Company recognized matching contribution expense of approximately $119,000 and $142,000, respectively. Under the plan, the Company can also make additional discretionary contributions, as determined by the Board of Directors. The Company contributed $80,000 to the plan during 2012.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	-12	Related Party Transactions

	The Company conducts transactions its with directors and executive officers, including companies in which such directors and executive officers have a beneficial interest, in the normal course of business. It is the Company’s policy to comply with federal regulations that require that loan and deposit transactions with directors and executive officers be made on substantially the same terms as those prevailing at the time for comparable loans and deposits to other persons. At December 31, 2014 and 2013, deposits from directors, executive officers and their related interests aggregated approximately $24,746,000 and $8,737,000, respectively. These deposits were taken in the normal course of business at market interest rates. The following is a summary of activity for related party loans for 2014:



	Balance at December 31, 2013		$	518
	New loans			268
	Repayments			(210	)
	Changes in related parties			2,261

	Balance at December 31, 2014		$	2,837

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Shareholders' Equity	-13	Shareholders’ Equity

	In connection with the Company’s formation and initial offering, 247,500 warrants for shares were issued to the organizers. The warrants were issued at the initial offering price of $20 per share and vested evenly over a five-year period. The warrants will be exercisable for a period of ten years following issuance, but generally no later than three months after the holder ceases to serve as a director. As of December 31, 2013, there were 30,000 warrants outstanding and exercisable, all of which were exercised during 2014.

	In connection with the Company’s entry into the Vero Beach, Florida market area, the Company completed the sale of 163,485 shares of common stock at $18.35 per share in a private placement on August 8, 2014. The sale of common stock raised $2,972,000, net of offering expenses of $28,000.

	During April 2014, the Company reincorporated in the State of Delaware. As a result of this reincorporation, the par value of the Company’s stock was changed from $1.00 par value per share to $0.01 par value per share. Additionally, all outstanding non-voting common shares were converted to common voting shares, and any fractional shares (totaling 17.5 shares) were cashed out. Other than the cash out of fractional shares, the reincorporation had no impact on total shares outstanding or total equity of the Company.

Regulatory_Matters

Regulatory Matters	12 Months Ended
Regulatory Matters	Dec. 31, 2014
Banking and Thrift [Abstract]
Regulatory Matters	-14	Regulatory Matters

	Banking regulations limit the amount of dividends that the Banks may pay without prior approval of the regulatory authorities. These restrictions are based on the level of regulatory classified assets, the prior years’ net earnings, and the ratio of equity capital to total assets. The Banks are currently not allowed to pay dividends until each becomes cumulatively profitable.

	The Company and the Banks are subject to various regulatory capital requirements administered by 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 financial statements. Under certain adequacy guidelines and the regulatory framework for prompt corrective action, specific capital guidelines that involve quantitative measures of the assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices must be met. The capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.



	Quantitative measures established by regulation to ensure capital adequacy require the Company and the Banks 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, 2014 and 2013, that the Company and the Banks meet all capital adequacy requirements to which they are subject.

	As of December 31, 2014 and 2013, the most recent notification from the regulators categorized the Banks as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Banks must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the table below. There are no conditions or events since that notification that management believes have changed the Banks’ category.

	The Company’s and its banking subsidiaries, NBC and ULB, actual capital amounts (in thousands) and ratios are also presented in the table below. ULB’s ratios are not presented as of December 31, 2013 as it was not acquired until December 15, 2014.



			Actual					For Capital					To Be Well
								Adequacy Purposes					Capitalized Under
													Prompt Corrective
													Action Provisions
			Amount		Ratio			Amount		Ratio			Amount		Ratio
	As of December 31, 2014
	Total Capital (to Risk Weighted Assets)
	National Commerce Corporation		$	106,289		11.75	%	$	72,367		8	%		N/A		N/A
	National Bank of Commerce		$	84,148		11.42	%	$	58,948		8	%	$	73,685		10	%
	United Legacy Bank		$	18,731		11.31	%	$	13,249		8	%	$	16,561		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	National Commerce Corporation		$	96,487		10.66	%	$	36,205		4	%		N/A		N/A
	National Bank of Commerce		$	74,927		10.16	%	$	29,499		4	%	$	44,248		6	%
	United Legacy Bank		$	18,731		11.31	%	$	6,625		4	%	$	9,937		6	%
	Tier 1 Capital (to Average Assets)
	National Commerce Corporation		$	96,487		10.68	%	$	36,137		4	%		N/A		N/A
	National Bank of Commerce		$	74,927		8.57	%	$	34,972		4	%	$	43,715		5	%
	United Legacy Bank		$	18,731		8.6	%	$	8,712		4	%	$	10,890		5	%

	As of December 31, 2013
	Total Capital (to Risk Weighted Assets)
	National Commerce Corporation		$	92,718		15.83	%	$	46,847		8	%		N/A		N/A
	National Bank of Commerce		$	91,918		15.71	%	$	46,803		8	%	$	58,504		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	National Commerce Corporation		$	85,376		14.58	%	$	23,423		4	%		N/A		N/A
	National Bank of Commerce		$	84,583		14.46	%	$	23,402		4	%	$	35,103		6	%
	Tier 1 Capital (to Average Assets)
	National Commerce Corporation		$	85,376		12.18	%	$	28,043		4	%		N/A		N/A
	National Bank of Commerce		$	84,583		12.07	%	$	28,042		4	%	$	35,053		5	%

	In July 2013, the federal banking regulatory agencies issued a final rule that revised their risk-based capital requirements and the method for calculating components of capital and of computing risk-weighted assets to make them consistent with agreements that were reached by the Basel Committee on Banking Supervision and certain provisions of the Dodd-Frank Act. The final rule applies to all depository institutions, top-tier bank holding companies with total consolidated assets of $500 million or more and top-tier savings and loan holding companies. The rule establishes a new common equity Tier 1 minimum capital requirement, increases the minimum capital ratios and assigns a higher risk weight to certain assets based on the risk associated with these assets. The final rule includes transition periods that generally implement the new regulations over a five-year period. These changes are being phased in as of January 2015, and while management continues to evaluate this final rule and its potential impact, preliminary assessments indicate that the Banks and the Company will continue to exceed all regulatory capital requirements under the new rule.

Fair_Value_Measurements_and_Di

Fair Value Measurements and Disclosures	12 Months Ended
Fair Value Measurements and Disclosures	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements and Disclosures	-15	Fair Value Measurements and Disclosures

	The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Securities available-for-sale and derivative financial instruments are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets on a nonrecurring basis, such as impaired loans and other real estate and repossessed assets. These nonrecurring fair value adjustments typically involve application of the lower of cost or market accounting or write-downs of individual assets.



	Fair Value Hierarchy

	The Company groups assets and liabilities at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:

	Level 1 – Valuation is based upon quoted prices for identical instruments traded in active markets.

	Level 2 – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.

	Level 3 – Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques.

	Following is a description of valuation methodologies used for assets and liabilities recorded or disclosed at fair value.

	Cash and Cash Equivalents

	For disclosure purposes, for cash, due from banks, interest-bearing deposits, and federal funds sold, the carrying amount is a reasonable estimate of fair value.

	Securities Available-for-Sale

	Securities available-for-sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange and U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter market funds. Level 2 securities include mortgage-backed securities issued by government sponsored enterprises and municipal bonds. Securities classified as Level 3 include asset-backed securities in less liquid markets.

	Other Investments

	For disclosure purposes, the carrying amount of other investments approximates their fair value.

	Loans and Mortgage Loans Held-for-Sale

	The Company does not record loans at fair value on a recurring basis. However, from time to time, a loan is considered impaired and an allowance for loan losses is established. Loans for which it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement are considered impaired. Once a loan is identified as individually impaired, management measures impairment using one of three methods, including collateral value, market value of similar debt, and discounted cash flows. Those impaired loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. At December 31, 2014 and 2013, impaired loans were evaluated based on the fair value of the collateral. Impaired loans where an allowance is established based on the fair value of collateral, or loans that are charged down according to the fair value of collateral, require classification in the fair value hierarchy. When the fair value of the collateral is based on an observable market price, the Company records the impaired loan as nonrecurring Level 2. When the fair value is based on an appraised value, the Company records the impaired loan as nonrecurring Level 3.

	For disclosure purposes, the fair value of fixed-rate loans is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings. For variable rate loans, the carrying amount is a reasonable estimate of fair value. Mortgage loans held-for-sale are carried at cost, which is a reasonable estimate of fair value.



	Bank Owned Life Insurance

	For disclosure purposes, the fair value of the cash surrender value of life insurance policies is equivalent to the carrying value.

	Other Real Estate

	Other real estate properties are adjusted to fair value upon transfer of the loans to other real estate. Subsequently, other real estate assets are carried at the lower of carrying value or fair value. Fair value is based upon independent market prices, appraised values of the collateral or management’s estimation of the value of the collateral. When the fair value of the collateral is based on an observable market price, the Company records the other real estate as nonrecurring Level 2. When fair value is based on an appraised value or management’s estimate of value, the Company records the other real estate or repossessed asset as nonrecurring Level 3.

	Deposits

	For disclosure purposes, the fair value of demand deposits, NOW and money market accounts, and savings accounts is the amount payable on demand at the reporting date. The fair value of fixed-rate maturity certificates of deposit is estimated by discounting the future cash flows using the rates currently offered for deposits of similar remaining maturities.

	Federal Home Loan Bank Advances

	For disclosure purposes, the fair value of the FHLB advances is based on the quoted value for similar remaining maturities provided by the FHLB.

	Derivative Financial Instruments

	Derivative financial instruments are recorded at fair value on a recurring basis. The valuation of the Company’s derivative financial instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of the derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair value of the interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments. The variable cash payments are based on an expectation of future interest rates (forward curves derived from observable market interest rate curves).

	The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting any applicable credit enhancements such as collateral postings, thresholds, mutual puts and guarantees.

	Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by itself or the counterparty. However, as of December 31, 2014 and 2013, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustment is not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations are classified in Level 2 of the fair value hierarchy.

	Commitments to Extend Credit and Standby Letters of Credit

Because commitments to extend credit and standby letters of credit are generally short-term and made using variable rates, the carrying value and estimated fair value associated with these instruments are immaterial.

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis as of December 31, 2014 and 2013.



December 31, 2014		Level 1		Level 2		Level 3		Total
U.S. Treasury securities		$	1,501		—		—		1,501
Mortgage-backed securities			—		28,750		—		28,750

Municipal securities			—		4,681		—		4,681

Total investment securities available-for-sale		$	1,501		33,431		—		34,932

Derivative assets		$	—		105		—		105

Derivative liability		$	—		425		—		425


December 31, 2013		Level 1		Level 2		Level 3		Total
Mortgage-backed securities		$	—		33,742		—		33,742
Municipal securities			—		4,270		—		4,270
Investment in mutual fund			—		9,967		—		9,967

Total investment securities available-for-sale		$	—		47,979		—		47,979

Derivative assets		$	—		493		—		493

Derivative liability		$	—		352		—		352


Assets Recorded at Fair Value on a Nonrecurring Basis

The Company may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis in accordance with U.S. generally accepted accounting principles. These include assets that are measured at the lower of cost or market that were recognized at fair value below cost at the end of the period. Assets measured at fair value on a nonrecurring basis are included in the table below as of December 31, 2014 and 2013.



December 31, 2014		Level 1		Level 2		Level 3		Total
Other real estate and repossessed assets		$	—		—		1,380		1,380
Impaired loans			—		—		4,865		4,865

December 31, 2013		Level 1		Level 2		Level 3		Total
Other real estate and repossessed assets		$	—		—		845		845
Impaired loans			—		—		3,371		3,371

The carrying amounts and estimated fair values of the Company’s financial instruments at December 31, 2014 and 2013 were as follows:



		Carrying		Estimated Fair Value
December 31, 2014		Amount		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents		$	123,435		123,435		—		—
Investment securities available-for-sale			34,932		1,501		33,431		—
Other investments			5,421		—		5,421		—
Loans, net			878,919		—		873,125		4,865
Mortgage loans held-for-sale			9,329		—		9,329		—
Bank owned life insurance			10,641		—		10,640		—
Derivative assets			105		—		105		—
Liabilities:
Deposits			971,060		—		949,621		—
Federal Home Loan Bank advances			22,000		—		22,677		—
Derivative liability			425		—		425		—

		Carrying		Estimated Fair Value
December 31, 2013		Amount		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents		$	124,136		124,136		—		—
Investment securities available-for-sale			47,979		—		47,979		—
Other investments			4,482		—		4,482		—
Loans, net			572,883		—		566,207		3,371
Mortgage loans held-for-sale			7,159		—		7,159		—
Bank owned life insurance			8,247		—		8,247		—
Derivative assets			493		—		493		—
Liabilities:
Deposits			678,031		—		674,070		—
Federal Home Loan Bank advances			22,000		—		22,743		—
Derivative liability			352		—		352		—

Limitations

Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on many judgments. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates.



Fair value estimates are based on existing on- and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include mortgage banking operations, deferred income taxes and premises and equipment. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

National_Commerce_Corporation_

National Commerce Corporation (Parent Company Only) Financial Information	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
National Commerce Corporation (Parent Company Only) Financial Information	-16	National Commerce Corporation (Parent Company Only) Financial Information

	Balance Sheets

	December 31, 2014 and 2013



			2014			2013
	Assets
	Cash and due from banks		$	829			805
	Investment in subsidiaries			133,909			87,609
	Other assets			1,557			535

	Total assets		$	136,295			88,949

	Liabilities and Shareholders’ Equity
	Other liabilities		$	134			10

	Total liabilities			134			10

	Commitments
	Shareholders’ equity:
	Common stock			75			5,730
	Additional paid-in capital			131,455			91,774
	Accumulated deficit			(3,453	)		(8,856	)
	Accumulated other comprehensive income			845			291

	Total shareholders’ equity attributable to NCC			128,922			88,939
	Noncontrolling interest			7,239			—

	Total shareholders’ equity			136,161			88,939

	Total liabilities and shareholders’ equity		$	136,295			88,949


	Statements of Earnings

	For the Years Ended December 31, 2014, 2013 and 2012



			2014			2013			2012
	Income		$	—			—			—
	Other expense			458			123			97

	Total expenses			458			123			97

	Loss before equity in undistributed earnings of subsidiaries			(458	)		(123	)		(97	)
	Equity in undistributed earnings of subsidiaries			5,764			4,079			2,117
	Income tax benefit			97			50			37

	Net earnings		$	5,403			4,006			2,057


	Statements of Cash Flows

	For the Years Ended December 31, 2014, 2013 and 2012



			2014			2013			2012
	Cash flows from operating activities:
	Net earnings		$	5,403			4,006			2,057
Adjustments to reconcile net earnings to net cash used by operating activities
Equity in undistributed earnings of subsidiaries			(5,764	)		(4,079	)		(2,117	)
Depreciation			1			—			—
Deferred income tax expense (benefit)			162			(81	)		(37	)
Change in other assets			(285	)		—			—
Change in other liabilities			121			10			(25	)

Net cash used by operating activities			(362	)		(144	)		(122	)

Cash flows from investing activities
Cash paid in acquisition			(3,201	)		—			—

Net cash used by financing activities			(3,201	)		—			—

Cash flows from financing activities
Proceeds from stock offerings, net of offering expenses of $28			2,972			—			—
Proceeds from exercise of stock options and warrants			615			—			—

Net cash provided by financing activities			3,587			—			—

Net change in cash			24			(144	)		(122	)

Cash at beginning of year			805			949			1,071

Cash at end of year		$	829			805			949

Segment_Reporting

Segment Reporting	12 Months Ended
Segment Reporting	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Reporting	-17	Segment Reporting

	The Company’s three reportable segments represent distinct product lines and are viewed separately for strategic planning purposes and internal reporting. The 2014 totals include the receivable factoring results for four months, as NBC acquired CBI on August 29, 2014. There are no amounts to report for this segment during 2013 and 2012. The following table is a reconciliation of the reportable segment revenues, expenses and profit to the Company’s consolidated totals.



			Retail and		Mortgage		Receivables			Elimination			Total
			Commercial		Division (1)		Factoring			Entries (2)
			Banking
	Twelve Months Ended December 31, 2014:
	Interest income		$	27,144		410		4,345			(557	)		31,342
	Interest expense			2,746		123		731			(731	)		2,869

	Net interest income			24,398		287		3,614			174			28,473
	Provision for loan and lease losses			—		—		804			174			978
	Noninterest income			811		4,199		22			—			5,032
	Noninterest expense			18,048		3,681		1,724			—			23,453

	Net earnings before tax & noncontrolling interest			7,161		805		1,108			—			9,074
	Income tax expense			2,627		306		226			—			3,159
	Noncontrolling interest			—		—		(512	)		—			(512	)

	Net earnings attributable to National Commerce Corporation		$	4,534		499		370			—			5,403

	Total assets as of December 31, 2014		$	1,099,191		9,329		105,330			(75,424	)		1,138,426

	Twelve Months Ended December 31, 2013:
	Interest income		$	22,893		419		—			—			23,312
	Interest expense			2,471		142		—			—			2,613

	Net interest income			20,422		277		—			—			20,699
	Provision for loan and lease losses			—		—		—			—			—
	Noninterest income			617		4,685		—			—			5,302
	Noninterest expense			15,819		3,866		—			—			19,685

	Net earnings before tax & noncontrolling interest			5,220		1,096		—			—			6,316
	Income tax expense			1,894		416		—			—			2,310
	Noncontrolling interest			—		—		—			—			—

	Net earnings attributable to National Commerce Corporation		$	3,326		680		—			—			4,006

	Total assets as of December 31, 2013		$	784,622		7,159		—			—			791,781

	Twelve Months Ended December 31, 2012:
	Interest income		$	19,517		435		—			—			19,952
	Interest expense			3,128		152		—			—			3,280

	Net interest income			16,389		283		—			—			16,672
	Provision for loan and lease losses			125		—		—			—			125
	Noninterest income			760		3,905		—			—			4,665
	Noninterest expense			14,912		3,172		—			—			18,084

	Net earnings before tax & noncontrolling interest			2,112		1,016		—			—			3,128
	Income tax expense			685		386		—			—			1,071
	Noncontrolling interest			—		—		—			—			—

	Net earnings attributable to National Commerce Corporation		$	1,427		630		—			—			2,057

	Total assets as of December 31, 2012		$	679,523		13,836		—			—			693,359



	-1	Noninterest income for mortgage division includes intercompany income allocation.
	-2	Entry to remove intercompany interest allocated to the receivables factoring segment and other purchase related adjustments. For segment reporting purposes, we allocate a funding cost of Fed Funds plus 2.5% to the factoring segment.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
Goodwill and Intangible Assets	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	-18	Goodwill and Intangible Assets

	During 2014, the Company recorded goodwill of $23,115,000 associated with the CBI acquisition and $5,719,000 on the United acquisition. In addition to the goodwill recorded for United, the Company recorded a core deposit intangible asset of $1,776,000. The core deposit intangible asset will be amortized using an accelerated method over seven years. At December 31, 2014, the gross amount of recorded core deposit intangibles was $1,776,000 with accumulated amortization of $19,000. The aggregate amount of amortization expense for intangible assets during 2014 was $19,000.

	The estimated amortization expense for each of the next five years is as follows:



	2015		$	441
	2016			378
	2017			314
	2018			251
	2019			187
	Thereafter			186

			$	1,757

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Basis of Presentation

Cash and Cash Equivalents

Investment Securities

Other Investments

Other investments include FRB stock, FHLB stock and other investments that do not have a readily determinable market value. These investments are carried at cost, which approximates fair value.

Loans and Allowance for Loan Losses

Nonrefundable loan fees and costs incurred for loans are deferred and recognized in income over the life of the loans.

Transfers of Financial Assets

Mortgage Loans Held-for-Sale

Premises and Equipment

Building and improvements

10 - 40 years

Furniture and equipment

5 - 10 years

Leasehold improvements

18 years

Computer equipment

3 years

Other Real Estate and Repossessed Assets

Business Combinations

Goodwill and Intangible Assets

Purchased Loans

Income Taxes

Derivative Financial Instruments and Hedging Activities

Mortgage Banking Derivative Commitments

Stock-Based Compensation

Accumulated Other Comprehensive Income

At December 31, 2014, 2013 and 2012, accumulated other comprehensive income consisted of net unrealized gains on investment securities available-for-sale.

Net Earnings per Common Share

The reconciliation of the components of basic and diluted earnings per share is as follows:

2014

2013

2012

Net earnings available to common shareholders

5,403

4,006

2,057

Weighted average common shares outstanding

5,888,862

5,730,114

Dilutive effect of stock options

19,266

6,511

3,276

Dilutive effect of performance share awards

52,071

27,660

7,010

Diluted common shares

5,960,199

5,764,285

5,740,400

Basic earnings per common share

0.92

0.7

0.36

Diluted earnings per common share

0.91

0.69

0.36

Reclassifications

Recently Issued Accounting Pronouncements

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
Summary of Significant Accounting Policies (Tables)	Dec. 31, 2014
Accounting Policies [Abstract]
Premises and Equipment Estimated Useful Lives	Depreciation expense is computed using the straight-line method over the following estimated useful lives:



	Building and improvements	10 - 40 years
	Furniture and equipment	5 - 10 years
	Leasehold improvements	18 years
	Computer equipment	3 years
Reconciliation of Components of Basic and Diluted Earnings Per Share	The reconciliation of the components of basic and diluted earnings per share is as follows:



		2014		2013		2012
	Net earnings available to common shareholders	$	5,403		4,006		2,057

	Weighted average common shares outstanding		5,888,862		5,730,114		5,730,114
	Dilutive effect of stock options		19,266		6,511		3,276
	Dilutive effect of performance share awards		52,071		27,660		7,010

	Diluted common shares		5,960,199		5,764,285		5,740,400

	Basic earnings per common share	$	0.92		0.7		0.36
	Diluted earnings per common share	$	0.91		0.69		0.36

Business_Combinations_Tables

Business Combinations (Tables)	12 Months Ended
Business Combinations (Tables)	Dec. 31, 2014
Summary of Estimated Fair Value of Assets and Liabilities Acquired	The table below summarizes the estimates of fair value of the assets purchased, including goodwill, and the liabilities assumed as of August 29, 2014.



			As of
			August 29, 2014
	Assets:
	Cash and cash equivalents		$	2,233
	Factored receivables			81,559
	Premises and equipment, net			444
	Other assets			157
	Goodwill			23,115

	Total assets			107,508

	Liabilities:
	Other liabilities			6,592
	Note payable			77,801

	Total liabilities			84,393

	Non controlling interest			6,934

	Purchase price		$	16,181

Schedule of Supplemental Pro Forma Information	The following unaudited supplemental pro forma information is presented to show estimated results assuming CBI and United were acquired as of the beginning of each period presented. These unaudited pro forma results are not necessarily indicative of the operating results that the Company would have achieved had it completed the acquisition as of January 1, 2013 or 2014 and should not be considered as representative of future operating results.



			For The Year Ended
			December 31,
			2014			2013
	Net interest income - pro forma (unaudited)		$	42,281		$	36,073
	Net earnings - pro forma (unaudited)		$	7,166		$	5,401
	Diluted earnings per common share (unaudited)		$	0.96		$	0.73
Summary of Loans at Acquisition Date	Loans at the acquisition date are presented in the following table.



			Acquired			Acquired			Total
			Impaired			Performing			Acquired
			Loans			Loans			Loans
	Commercial, financial, and agricultural		$	929			22,274			23,203
	Real estate - mortgage			6,844			105,361			112,205
	Real estate - construction			918			7,377			8,295
	Consumer			336			5,887			6,223

	Total		$	9,027			140,899			149,926

Summary of Purchased Credit-Impaired Loans at Acquisition	The following table presents information about the purchased credit-impaired loans at acquisition.



	Contractually required principal and interest payments		$	11,956
	Non-accretable difference			2,929

	Cash flows expected to be collected			9,027
	Accretable discount			—

	Fair value of loans acquired with a deterioration of credit quality		$	9,027

Summary of Changes in Carrying Amount of Accretable Yield on Acquired Loans	The following table presents changes in the carrying amount of the accretable yield on acquired loans for the year ended December 31, 2014. The Company had no acquisitions prior to the year ended December 31, 2014.



			2014
	Balance, beginning of year		$	—
	Acquisition of United			1,480
	Accretion			(13	)
	Net transfers from non-accretable difference to accretable yield			—

	Balance, end of year		$	1,467

United Group Banking Company of Florida [Member]
Summary of Estimated Fair Value of Assets and Liabilities Acquired	The following table presents the assets acquired and liabilities assumed of United as of December 15, 2014, at their initial fair value estimates:



			As Recorded			Fair Value			As Recorded
			By United			Adjustments			By the Company
	Cash and cash equivalents		$	37,072			—			37,072
	Investment securities			26,376			(966	) a		25,410
	Loans			154,334			(4,408	) b		149,926
	Allowance for loan losses			2,162			(2,162	) c		—

	Net loans			152,172			(2,246	)		149,926
	Premises and equipment, net			8,292			648	d		8,940
	Core deposit intangible			—			1,776	e		1,776
	Bank owned life insurance			2,151			—			2,151
	Other real estate and repossessions			818			(260	) f		558
	Other assets			7,269			125	g		7,394

	Total Assets		$	234,150			(923	)		233,227

										—
	Non-interest bearing		$	50,007			—			50,007
	Interest-bearing			150,539			—			150,539

	Total Deposits			200,546			—			200,546
	FHLB advances			4,865			9	h		4,874
	Other liabilities			217			—			217

	Total Liabilities			205,628			9			205,637

										—
	Net identifiable assets acquired over liabilities assumed			28,522			(932	)		27,590
	Goodwill			—			5,719			5,719

	Net assets acquired over liabilities assumed		$	28,522			4,787			33,309

	Consideration:
	Shares of common stock issued			1,617,027
	Estimated value per share of the Company’s stock		$	18.72

	Fair value of Company stock issued			30,271
	Cash exchanged for shares and cash in lieu			2,954
	Value of assumed stock options			84

	Fair value of total consideration transferred		$	33,309




	Explanation of fair value adjustments


		a.	Adjustment reflects fair value adjustments of the available-for-sale portfolio at acquisition date.


		b.	Adjustment reflects the fair value adjustments based on the Company’s evaluation of the acquired loan portfolio.


		c.	Adjustment reflects the elimination of United’s allowance for loan losses.


		d.	Adjustment reflects the fair value adjustment on United’s main office location.


	e.	Adjustment reflects the recording of core deposit intangible asset.


	f.	Adjustment reflects the fair value adjustment based on the evaluation of the acquired other real estate and repossessed assets.


	g.	Adjustment to record the deferred tax asset created by purchase adjustments.


	h.	Adjustment reflects the fair value adjustment to the FHLB borrowings.

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
Investment Securities (Tables)	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Summary of Available for Sale Securities	Investment securities available-for-sale at December 31, 2014 and 2013 are as follows:



				Gross		Gross		Estimated
		Amortized		Unrealized		Unrealized		Fair
	December 31, 2014	Cost		Gains		Losses		Value
	U.S. Treasury securities	$	1,501		—		—		1,501
	Mortgage-backed securities		27,723		1,138		111		28,750
	Municipal securities		4,408		279		6		4,681

	Total investment securities available-for-sale	$	33,632		1,417		117		34,932


				Gross		Gross		Estimated
		Amortized		Unrealized		Unrealized		Fair
	December 31, 2013	Cost		Gains		Losses		Value
	Mortgage-backed securities	$	33,123		1,022		403		33,742
	Municipal securities		4,409		59		198		4,270
	Mutual fund		10,000		—		33		9,967

	Total investment securities available-for-sale	$	47,532		1,081		634		47,979

Schedule of Investment Securities with Unrealized Losses	Details concerning investment securities with unrealized losses as of December 31, 2014 and 2013 are as follows:



		December 31, 2014
		Less than 12 Months				12 Months or More				Total
		Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
		Value		Losses		Value		Losses		Value		Losses
	U.S. Treasury securities	$	—		—		—		—		—		—
	Mortgage-backed securities		—		—		7,705		111		7,705		111
	Municipal securities		—		—		494		6		494		6

		$	—		—		8,199		117		8,199		117


		31-Dec-13
		Less than 12 Months				12 Months or More				Total
		Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
		Value		Losses		Value		Losses		Value		Losses
	Mortgage-backed securities	$	8,409		403		—		—		8,409		403
	Municipal securities		2,086		198		—		—		2,086		198
	Mutual fund		9,967		33		—		—		9,967		33

		$	20,462		634		—		—		20,462		634

Schedule of Amortized Cost and Estimated Fair Value of Securities Available-For-Sale	The amortized cost and estimated fair value of securities available-for-sale at December 31, 2014, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties.



		Amortized		Fair
		Cost		Value
	Municipal & U.S. Treasury securities:
	0 to 5 years	$	1,501		1,501
	5 to 10 years		1,047		1,101
	Over 10 years		3,361		3,580
	Mortgage-backed securities		27,723		28,750

		$	33,632		34,932

Loans_Tables

Loans (Tables)	12 Months Ended
Loans (Tables)	Dec. 31, 2014
Receivables [Abstract]
Summary of Major Classifications of Loans	Major classifications of loans at December 31, 2014 and 2013 are summarized as follows:



		2014			2013
	Commercial, financial, and agricultural	$	131,657			115,005
	Factored commercial receivables		82,600			—
	Real estate - mortgage		577,268			403,053
	Real estate - construction		83,663			58,372
	Consumer		13,962			6,113
	Leases		—			6

			889,150			582,549
	Less: Unearned fees		429			547

	Total loans and leases		888,721			582,002
	Allowance for loan losses		(9,802	)		(9,119	)

	Total net loans and leases	$	878,919			572,883

Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment	The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2014, 2013 and 2012. The acquired loans are not included in the allowance for loan losses calculation, as these loans are recorded at fair value and there has been no further indication of credit deterioration that would require an additional provision.



		Commercial,			Factored
		financial, and			Commercial			Real estate -			Real estate -
		agricultural			receivables			mortgage			Construction			Consumer			Leases			Unallocated			Total
	Balance, December 31, 2014
	Balance, beginning of year	$	1,398			—			4,449			964			243			—			2,065			9,119
	Provisions charged to operating expense		61			978			988			(350	)		298			—			(997	)		978
	Loans charged off		(3	)		(656	)		(429	)		—			—			—			—			(1,088	)
	Recoveries		67			633			39			33			21			—			—			793

	Balance, end of year	$	1,523			955			5,047			647			562			—			1,068			9,802

	Ending balance, individually evaluated for impairment	$	—			473			350			50			—			—			—			873
	Ending balance, collectively evaluated for impairment		1,523			482			4,697			597			562			—			1,068			8,929
	Loans:
	Individually evaluated for impairment	$	—			1,605			2,078			198			—			—			—			3,881
	Collectively evaluated for impairment	$	130,656			80,995			568,363			82,551			13,627			—			—			876,192
	Acquired loans with deteriorated credit quality	$	1,001			—			6,827			914			335			—			—			9,077



		Commercial,			Factored
		financial, and			Commercial			Real estate -			Real estate -
		agricultural			receivables			mortgage			Construction			Consumer			Leases			Unallocated			Total
	Balance, December 31, 2013
	Balance, beginning of year	$	1,158			—			5,093			497			170			3			3,099			10,020
	Provisions charged to operating expense		(47	)		—			864			162			58			(3	)		(1,034	)		—
	Loans charged off		(32	)		—			(1,557	)		—			—			—			—			(1,589	)
	Recoveries		319			—			49			305			15			—			—			688

	Balance, end of year	$	1,398			—			4,449			964			243			—			2,065			9,119

	Ending balance, individually evaluated for impairment	$	—			—			—			—			—			—			—			—
	Ending balance, collectively evaluated for impairment	$	1,398			—			4,449			964			243			—			2,065			9,119
	Loans:
	Individually evaluated for impairment	$	27			—			3,344			—			—			—			—			3,371
	Collectively evaluated for impairment	$	114,978			—			399,709			58,372			6,113			6			—			579,178

		Commercial,			Factored
		financial, and			Commercial			Real estate -			Real estate -
		agricultural			receivables			mortgage			Construction			Consumer			Leases			Unallocated			Total
	Balance, December 31, 2012
	Balance, beginning of year	$	1,423			—			5,509			1,071			90			29			2,221			10,343
	Provisions charged to operating expense		(435	)		—			(397	)		(303	)		408			(25	)		877			125
	Loans charged off		(41	)		—			(409	)		(1,292	)		(372	)		—			—			(2,114	)
	Recoveries		211			—			391			1,021			43			—			—			1,666

	Balance, end of year	$	1,158			—			5,094			497			169			4			3,098			10,020

	Ending balance, individually evaluated for impairment	$	—			—			—			—			—			—			—			—
	Ending balance, collectively evaluated for impairment	$	1,158			—			5,094			497			169			4			3,098			10,020
	Loans:
	Individually evaluated for impairment	$	—			—			244			—			—			—			—			244
	Collectively evaluated for impairment	$	92,147			—			302,873			36,267			10,030			413			—			441,730
Summary of Impaired Loans by Class of Loans	The following tables present impaired loans by class of loans as of December 31, 2014 and 2013. The purchased credit-impaired loans are not included in these tables because they are carried at fair value and accordingly have no related associated allowance.



					Unpaid						Average
		Recorded			Principal			Related			Recorded
	December 31, 2014	Investment			Balance			Allowance			Investment
	Impaired loans without related allowance:
	Commercial, financial, and agricultural	$	—			—			—			24
	Factored commercial receivables		—			—			—			—
	Real estate - mortgage		1,052			2,030			—			1,770
	Real estate - construction		—			—			—			—
	Consumer		—			—			—			—
	Leases		—			—			—			—

	Total	$	1,052			2,030			—			1,794

	Impaired loans with related allowance:
	Commercial, financial, and agricultural	$	—			—			—			—
	Factored commercial receivables		1,605			1,605			473			321
	Real estate - mortgage		1,026			1,026			350			205
	Real estate - construction		198			198			50			40
	Consumer		—			—			—			—
	Leases		—			—			—			—

	Total	$	2,829			2,829			873			566

	Total impaired loans:
	Commercial, financial, and agricultural	$	—			—			—			24
	Factored commercial receivables		1,605			1,605			473			321
	Real estate - mortgage		2,078			3,056			350			1,975
	Real estate - construction		198			198			50			40
	Consumer		—			—			—			—
	Leases		—			—			—			—

	Total	$	3,881			4,859			873			2,360


					Unpaid						Average
		Recorded			Principal			Related			Recorded
	December 31, 2013	Investment			Balance			Allowance			Investment
	Impaired loans without related allowance:
	Commercial, financial, and agricultural	$	27			236			—			2
	Real estate - mortgage		3,344			4,429			—			2,075
	Real estate - construction		—			—			—			—
	Consumer		—			—			—			—
	Leases		—			—			—			—

	Total	$	3,371			4,665			—			2,077

Summary of Aging of Recorded Investment in Past Due and Non-accrual Loan	The following tables present the aging of the recorded investment in past due loans and non-accrual loan balances as of December 31, 2014 and 2013 by class of loans.

		30-59 Days			60-89 Days			> 90 Days			Total
	December 31, 2014	Past Due			Past Due			Past Due			Past Due			Current			Total			Non-accrual
	Commercial, financial, and agricultural	$	—			—			—			—			131,657			131,657			—
	Factored commercial receivables		6,327			1,013			217			7,557			75,043			82,600			—
	Real estate - mortgage		191			1,963			1,572			3,726			573,542			577,268			4,133
	Real estate - construction		198			—			—			198			83,465			83,663			676
	Consumer		188			—			132			320			13,642			13,962			56
	Leases		—			—			—			—			—			—			—

	Total	$	6,904			2,976			1,921			11,801			877,349			889,150			4,865


		30-59 Days			60-89 Days			> 90 Days			Total
	December 31, 2013	Past Due			Past Due			Past Due			Past Due			Current			Total			Non-accrual
	Commercial, financial, and agricultural	$	—			—			—			—			115,005			115,005			27
	Real estate - mortgage		343			—			2,579			2,922			400,131			403,053			3,344
	Real estate - construction		—			—			—			—			58,372			58,372			—
	Consumer		—			—			—			—			6,113			6,113			—
	Leases		—			—			—			—			6			6			—

	Total	$	343			—			2,579			2,922			579,627			582,549			3,371

Summary of Risk Category of Loans by Class of Loans	As of December 31, 2014 and 2013, and based on the most recent analyses performed, the risk category of loans by class of loans is as follows:



	December 31, 2014	Pass			OAEM			Substandard			Doubtful			Total
	Commercial, financial, and agricultural	$	129,314			1,159			1,184			—			131,657
	Factored commercial receivables		80,995			—			—			1,605			82,600
	Real estate - mortgage		565,992			4,057			2,803			4,416			577,268
	Real estate - construction		82,552			94			254			763			83,663
	Consumer		13,192			201			477			92			13,962
	Leases		—			—			—			—			—

	Total	$	872,045			5,511			4,718			6,876			889,150


	December 31, 2013	Pass			OAEM			Substandard			Doubtful			Total
	Commercial, financial, and agricultural	$	111,828			1,257			1,893			27			115,005
	Real estate - mortgage		392,568			3,829			3,312			3,344			403,053
	Real estate - construction		58,372			—			—			—			58,372
	Consumer		6,113			—			—			—			6,113
	Leases		6			—			—			—			6

	Total	$	568,887			5,086			5,205			3,371			582,549

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
Premises and Equipment (Tables)	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	Major classifications of premises and equipment as of December 31, 2014 and 2013 are summarized as follows:



		2014		2013
	Land	$	11,389		3,205
	Building and improvements		12,525		6,500
	Furniture and equipment		5,854		2,904
	Leasehold improvement		3,045		2,377
	Construction in process		1,348		4,136
	Automobile		53		—

			34,214		19,122
	Less accumulated depreciation		6,654		2,941

		$	27,560		16,181

Deposits_Tables

Deposits (Tables)	12 Months Ended
Deposits (Tables)	Dec. 31, 2014
Banking and Thrift [Abstract]
Summary of Contractual Maturities of Time Deposits	At December 31, 2014, contractual maturities of time deposits are summarized as follows:



	2015	$	107,492
	2016		45,383
	2017		30,051
	2018		16,414
	2019		6,867

		$	206,207

Federal_Home_Loan_Bank_Advance1

Federal Home Loan Bank Advances and Borrowings (Tables)	12 Months Ended
Federal Home Loan Bank Advances and Borrowings (Tables)	Dec. 31, 2014
Banking and Thrift [Abstract]
Summary of Advances Outstanding from FHLB	At December 31, 2014 and 2013, the Company had advances outstanding from the FHLB that are summarized as follows:



	Advance		Interest Basis	Current Rate	Maturity	Call or
	Advance		Interest Basis	Current Rate	Maturity	Conversion Date
	$	2,000	Fixed	4.06%	February 1, 2019	N/A
		15,000	Fixed	1.04%	January 26, 2016	N/A
		5,000	Fixed	3.96%	July 2, 2018	N/A

	$	22,000

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense	The components of income tax expense for the years ended December 31, 2014, 2013 and 2012 are as follows:



		2014			2013			2012
	Current	$	2,607			409			71
	Deferred		28			550			(240	)
	Expense of operating loss carryforwards		536			1,351			1,240
	Change in valuation allowance		(12	)		—			—

		$	3,159			2,310			1,071

Schedule of Difference Between Income Tax Expense and Amount Computed by Applying Statutory Federal Income Tax Rate to Income Before Taxes	The difference between income tax expense and the amount computed by applying the statutory federal income tax rate to income before taxes for the years ended December 31, 2014, 2013 and 2012 is as follows:



		2014			2013			2012
	Pretax income at statutory rate	$	3,085			2,147			1,064
	State income tax expense, net		224			251			125
	Cash surrender value income		(83	)		(80	)		(66	)
	Tax exempt interest		(65	)		(56	)		(68	)
	Minority interest		(174	)		—			—
	Merger related expenses		111			—			—
	Change in valuation allowance		(12	)		—			—
	Other		73			48			16

		$	3,159			2,310			1,071

Components of Deferred Taxes	The following summarizes the components of deferred taxes at December 31, 2014 and 2013.



		2014			2013
	Deferred income tax assets:
	Loans and allowance for loan losses	$	4,471			2,501
	Accrued expenses		106			107
	Operating loss carryforwards and credits		7,037			3,260
	Premises and equipment		283			672
	Capital loss carryforward		—			14
	Non-accrual interest income		31			75
	Stock-based compensation		479			347
	Other real estate		99			32
	Investment in pass through entity		208			—
	Other		157			164

	Total gross deferred income tax assets		12,871			7,172
	Less valuation allowance		—			(12	)

	Net deferred income tax assets		12,871			7,160
	Deferred income tax liabilities:
	Unrealized gains on investment securities available-for-sale		455			156
	Prepaid expenses		182			154
	Core deposit intangible		668			—
	Goodwill		122			—
	Leases		—			93

	Total gross deferred income tax liabilities		1,427			403

	Net deferred income tax assets	$	11,444			6,757

Commitments_Tables

Commitments (Tables)	12 Months Ended
Commitments (Tables)	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Financial Instrument Whose Contract Amounts Represent Credit Risk	In most cases, the Company requires collateral or other security to support financial instruments with credit risk.



		December 31,
		2014		2013
	Financial instruments whose contract amounts represents credit risk:
	Commitments to extend credit	$	182,820		141,887
	Stand-by and performance letter of credit	$	8,085		4,066
Future Minimum Rent on Operating Leases	Future minimum rent on operating leases as of December 31, 2014 is as follows:



	Year ending December 31,
	2015	$	739
	2016		388
	2017		311
	2018		192
	2019		—
	Thereafter		—

		$	1,630

Derivative_Financial_Instrumen1

Derivative Financial Instruments and Hedging Transactions (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Values and Notional Amounts of Company's Derivative Instruments	As of December 31, 2014 and 2013, the approximate fair values and notional amounts of the Company’s derivative instruments, as well as their location on the consolidated balance sheet, are included in the table below.



	December 31, 2014	Balance Sheet	Fair Value			Notional
	December 31, 2014	Location	Fair Value			Amount
	Interest rate swaps designated as fair value hedges	Other Liabilities	$	(417	)		16,674
	Interest rate swaps with customers	Other Liabilities	$	(7	)		9,646
	Reciprical interest rate swaps	Other Assets	$	7			9,646

	December 31, 2013	Balance Sheet	Fair Value			Notional
	December 31, 2013	Location	Fair Value			Amount
	Interest rate swaps designated as fair value hedges	Other Assets	$	62			17,264
	Interest rate swaps with customers	Other Liabilities	$	(352	)		10,018
	Reciprical interest rate swaps	Other Assets	$	352			10,018

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Dec. 31, 2014
Postemployment Benefits [Abstract]
Summary of Activity Related to Outstanding Stock Options	A summary of activity in the outstanding stock options for the years ended December 31, 2014, 2013 and 2012 is presented below:



		2014					2013				2012
					Weighted				Weighted				Weighted
					Average				Average				Average
					Exercise				Exercise				Exercise
		Shares			Price		Shares		Price		Shares		Price
	Outstanding, beginning of year		220,500		$	14.57		220,500	$	14.57		220,500	$	14.57
	Granted		—			—		—		—		—		—
	Assumed		102,586			23.45		—		—		—		—
	Exercised		(1,000	)		14.57		—		—		—		—
	Forfeited		—			—		—		—		—		—

	Oustanding, end of year		322,086		$	17.4		220,500	$	14.57		220,500	$	14.57

	Exercisable, end of year		322,086		$	17.4		220,500	$	14.57		220,500	$	14.57

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
Related Party Transactions (Tables)	Dec. 31, 2014
Related Party Transactions [Abstract]
Summary of Activity for Related Party Loans	The following is a summary of activity for related party loans for 2014:



	Balance at December 31, 2013	$	518
	New loans		268
	Repayments		(210	)
	Changes in related parties		2,261

	Balance at December 31, 2014	$	2,837

Regulatory_Matters_Tables

Regulatory Matters (Tables)	12 Months Ended
Regulatory Matters (Tables)	Dec. 31, 2014
Banking and Thrift [Abstract]
Company's and National Bank of Commerce's Capital Amounts and Ratios	The Company’s and its banking subsidiaries, NBC and ULB, actual capital amounts (in thousands) and ratios are also presented in the table below. ULB’s ratios are not presented as of December 31, 2013 as it was not acquired until December 15, 2014.



		Actual					For Capital					To Be Well
							Adequacy Purposes					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	As of December 31, 2014
	Total Capital (to Risk Weighted Assets)
	National Commerce Corporation	$	106,289		11.75	%	$	72,367		8	%		N/A		N/A
	National Bank of Commerce	$	84,148		11.42	%	$	58,948		8	%	$	73,685		10	%
	United Legacy Bank	$	18,731		11.31	%	$	13,249		8	%	$	16,561		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	National Commerce Corporation	$	96,487		10.66	%	$	36,205		4	%		N/A		N/A
	National Bank of Commerce	$	74,927		10.16	%	$	29,499		4	%	$	44,248		6	%
	United Legacy Bank	$	18,731		11.31	%	$	6,625		4	%	$	9,937		6	%
	Tier 1 Capital (to Average Assets)
	National Commerce Corporation	$	96,487		10.68	%	$	36,137		4	%		N/A		N/A
	National Bank of Commerce	$	74,927		8.57	%	$	34,972		4	%	$	43,715		5	%
	United Legacy Bank	$	18,731		8.6	%	$	8,712		4	%	$	10,890		5	%

	As of December 31, 2013
	Total Capital (to Risk Weighted Assets)
	National Commerce Corporation	$	92,718		15.83	%	$	46,847		8	%		N/A		N/A
	National Bank of Commerce	$	91,918		15.71	%	$	46,803		8	%	$	58,504		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	National Commerce Corporation	$	85,376		14.58	%	$	23,423		4	%		N/A		N/A
	National Bank of Commerce	$	84,583		14.46	%	$	23,402		4	%	$	35,103		6	%
	Tier 1 Capital (to Average Assets)
	National Commerce Corporation	$	85,376		12.18	%	$	28,043		4	%		N/A		N/A
	National Bank of Commerce	$	84,583		12.07	%	$	28,042		4	%	$	35,053		5	%

Fair_Value_Measurements_and_Di1

Fair Value Measurements and Disclosures (Tables)	12 Months Ended
Fair Value Measurements and Disclosures (Tables)	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis as of December 31, 2014 and 2013.



	December 31, 2014	Level 1		Level 2		Level 3		Total
	U.S. Treasury securities	$	1,501		—		—		1,501
	Mortgage-backed securities		—		28,750		—		28,750

	Municipal securities		—		4,681		—		4,681

	Total investment securities available-for-sale	$	1,501		33,431		—		34,932

	Derivative assets	$	—		105		—		105

	Derivative liability	$	—		425		—		425


	December 31, 2013	Level 1		Level 2		Level 3		Total
	Mortgage-backed securities	$	—		33,742		—		33,742
	Municipal securities		—		4,270		—		4,270
	Investment in mutual fund		—		9,967		—		9,967

	Total investment securities available-for-sale	$	—		47,979		—		47,979

	Derivative assets	$	—		493		—		493

	Derivative liability	$	—		352		—		352

Summary of Assets Measured at Fair Value on a Nonrecurring Basis	Assets measured at fair value on a nonrecurring basis are included in the table below as of December 31, 2014 and 2013.


	December 31, 2014	Level 1		Level 2		Level 3		Total
	Other real estate and repossessed assets	$	—		—		1,380		1,380
	Impaired loans		—		—		4,865		4,865

	December 31, 2013	Level 1		Level 2		Level 3		Total
	Other real estate and repossessed assets	$	—		—		845		845
	Impaired loans		—		—		3,371		3,371
Summary of Carrying Amounts and Estimated Fair Values of the Company's Financial Instruments	The carrying amounts and estimated fair values of the Company’s financial instruments at December 31, 2014 and 2013 were as follows:



		Carrying		Estimated Fair Value
	December 31, 2014	Amount		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents	$	123,435		123,435		—		—
	Investment securities available-for-sale		34,932		1,501		33,431		—
	Other investments		5,421		—		5,421		—
	Loans, net		878,919		—		873,125		4,865
	Mortgage loans held-for-sale		9,329		—		9,329		—
	Bank owned life insurance		10,641		—		10,640		—
	Derivative assets		105		—		105		—
	Liabilities:
	Deposits		971,060		—		949,621		—
	Federal Home Loan Bank advances		22,000		—		22,677		—
	Derivative liability		425		—		425		—

		Carrying		Estimated Fair Value
	December 31, 2013	Amount		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents	$	124,136		124,136		—		—
	Investment securities available-for-sale		47,979		—		47,979		—
	Other investments		4,482		—		4,482		—
	Loans, net		572,883		—		566,207		3,371
	Mortgage loans held-for-sale		7,159		—		7,159		—
	Bank owned life insurance		8,247		—		8,247		—
	Derivative assets		493		—		493		—
	Liabilities:
	Deposits		678,031		—		674,070		—
	Federal Home Loan Bank advances		22,000		—		22,743		—
	Derivative liability		352		—		352		—

National_Commerce_Corporation_1

National Commerce Corporation (Parent Company Only) Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Balance Sheets	Balance Sheets

	December 31, 2014 and 2013



		2014			2013
	Assets
	Cash and due from banks	$	829			805
	Investment in subsidiaries		133,909			87,609
	Other assets		1,557			535

	Total assets	$	136,295			88,949

	Liabilities and Shareholders’ Equity
	Other liabilities	$	134			10

	Total liabilities		134			10

	Commitments
	Shareholders’ equity:
	Common stock		75			5,730
	Additional paid-in capital		131,455			91,774
	Accumulated deficit		(3,453	)		(8,856	)
	Accumulated other comprehensive income		845			291

	Total shareholders’ equity attributable to NCC		128,922			88,939
	Noncontrolling interest		7,239			—

	Total shareholders’ equity		136,161			88,939

	Total liabilities and shareholders’ equity	$	136,295			88,949

Statements of Earnings	Statements of Earnings

	For the Years Ended December 31, 2014, 2013 and 2012



		2014			2013			2012
	Income	$	—			—			—
	Other expense		458			123			97

	Total expenses		458			123			97

	Loss before equity in undistributed earnings of subsidiaries		(458	)		(123	)		(97	)
	Equity in undistributed earnings of subsidiaries		5,764			4,079			2,117
	Income tax benefit		97			50			37

	Net earnings	$	5,403			4,006			2,057

Statements of Cash Flows	Statements of Cash Flows

	For the Years Ended December 31, 2014, 2013 and 2012



		2014			2013			2012
	Cash flows from operating activities:
	Net earnings	$	5,403			4,006			2,057
	Adjustments to reconcile net earnings to net cash used by operating activities
	Equity in undistributed earnings of subsidiaries		(5,764	)		(4,079	)		(2,117	)
	Depreciation		1			—			—
	Deferred income tax expense (benefit)		162			(81	)		(37	)
	Change in other assets		(285	)		—			—
	Change in other liabilities		121			10			(25	)

	Net cash used by operating activities		(362	)		(144	)		(122	)

	Cash flows from investing activities
	Cash paid in acquisition		(3,201	)		—			—

	Net cash used by financing activities		(3,201	)		—			—

	Cash flows from financing activities
	Proceeds from stock offerings, net of offering expenses of $28		2,972			—			—
	Proceeds from exercise of stock options and warrants		615			—			—

	Net cash provided by financing activities		3,587			—			—

	Net change in cash		24			(144	)		(122	)

	Cash at beginning of year		805			949			1,071

	Cash at end of year	$	829			805			949

Segment_Reporting_Tables

Segment Reporting (Tables)	12 Months Ended
Segment Reporting (Tables)	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Reconciliation of Reportable Segment Revenue, Expenses and Profit	The following table is a reconciliation of the reportable segment revenues, expenses and profit to the Company’s consolidated totals.



			Retail and		Mortgage		Receivables			Elimination			Total
			Commercial		Division (1)		Factoring			Entries (2)
			Banking
	Twelve Months Ended December 31, 2014:
	Interest income		$	27,144		410		4,345			(557	)		31,342
	Interest expense			2,746		123		731			(731	)		2,869

	Net interest income			24,398		287		3,614			174			28,473
	Provision for loan and lease losses			—		—		804			174			978
	Noninterest income			811		4,199		22			—			5,032
	Noninterest expense			18,048		3,681		1,724			—			23,453

	Net earnings before tax & noncontrolling interest			7,161		805		1,108			—			9,074
	Income tax expense			2,627		306		226			—			3,159
	Noncontrolling interest			—		—		(512	)		—			(512	)

	Net earnings attributable to National Commerce Corporation		$	4,534		499		370			—			5,403

	Total assets as of December 31, 2014		$	1,099,191		9,329		105,330			(75,424	)		1,138,426

	Twelve Months Ended December 31, 2013:
	Interest income		$	22,893		419		—			—			23,312
	Interest expense			2,471		142		—			—			2,613

	Net interest income			20,422		277		—			—			20,699
	Provision for loan and lease losses			—		—		—			—			—
	Noninterest income			617		4,685		—			—			5,302
	Noninterest expense			15,819		3,866		—			—			19,685

	Net earnings before tax & noncontrolling interest			5,220		1,096		—			—			6,316
	Income tax expense			1,894		416		—			—			2,310
	Noncontrolling interest			—		—		—			—			—

	Net earnings attributable to National Commerce Corporation		$	3,326		680		—			—			4,006

	Total assets as of December 31, 2013		$	784,622		7,159		—			—			791,781

	Twelve Months Ended December 31, 2012:
	Interest income		$	19,517		435		—			—			19,952
	Interest expense			3,128		152		—			—			3,280

	Net interest income			16,389		283		—			—			16,672
	Provision for loan and lease losses			125		—		—			—			125
	Noninterest income			760		3,905		—			—			4,665
	Noninterest expense			14,912		3,172		—			—			18,084

	Net earnings before tax & noncontrolling interest			2,112		1,016		—			—			3,128
	Income tax expense			685		386		—			—			1,071
	Noncontrolling interest			—		—		—			—			—

	Net earnings attributable to National Commerce Corporation		$	1,427		630		—			—			2,057

	Total assets as of December 31, 2012		$	679,523		13,836		—			—			693,359



	-1	Noninterest income for mortgage division includes intercompany income allocation.
	-2	Entry to remove intercompany interest allocated to the receivables factoring segment and other purchase related adjustments. For segment reporting purposes, we allocate a funding cost of Fed Funds plus 2.5% to the factoring segment.

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
Goodwill and Intangible Assets (Tables)	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Estimated Amortization Expense	The estimated amortization expense for each of the next five years is as follows:



	2015	$	441
	2016		378
	2017		314
	2018		251
	2019		187
	Thereafter		186

		$	1,757

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]
Reserve	$2,436,000	$15,322,000
Federal fund sold period	1 day
Mortgage loans maturity date	60 days
Interest rate lock commitment derivatives	98,000	79,000
Income recognized	$18,000	$79,000
Anti-dilutive potential common shares are excluded from the diluted earnings per share computation		30,000	30,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of Intangible assets	3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of Intangible assets	10 years

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Premises and Equipment Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2014
Leasehold Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	18 years
Computer Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Minimum [Member] \| Building and Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years
Minimum [Member] \| Furniture and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Maximum [Member] \| Building and Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	40 years
Maximum [Member] \| Furniture and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Reconciliation of Components of Basic and Diluted Earnings Per Share (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Reconciliation [Abstract]
Net earnings available to common shareholders	$5,403	$4,006	$2,057
Weighted average common shares outstanding	5,888,862	5,730,114	5,730,114
Dilutive effect of stock options	19,266	6,511	3,276
Dilutive effect of performance share awards	52,071	27,660	7,010
Diluted common shares	5,960,199	5,764,285	5,740,400
Basic earnings per common share	$0.92	$0.70	$0.36
Diluted earnings per common share	$0.91	$0.69	$0.36

Business_Combinations_Addition

Business Combinations - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Aug. 29, 2014	Dec. 15, 2014
Business Acquisition [Line Items]
Goodwill	$28,834,000		$5,719,000
Discount on purchased factored receivables	174,000
Direct stock issuance cost charged against additional paid in capital	28,000
Minimum [Member]
Business Acquisition [Line Items]
Average life for CBI's receivables	35 days
Maximum [Member]
Business Acquisition [Line Items]
Average life for CBI's receivables	40 days
CBI [Member]
Business Acquisition [Line Items]
Acquisition date	29-Aug-14
Acquired percentage	70.00%
Consideration paid in cash	16,181,000	16,181,000
Goodwill	23,115,000	23,115,000
CBI [Member] \| Option To Purchase [Member]
Business Acquisition [Line Items]
Acquired percentage	30.00%
CBI [Member] \| Option To Purchase [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Acquisition date	29-Aug-19
CBI [Member] \| Option To Purchase [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Acquisition date	29-Aug-22
United Group Banking Company of Florida [Member]
Business Acquisition [Line Items]
Acquisition date			15-Dec-14
Consideration paid in cash			2,950,000
Goodwill	5,719,000		5,719,000
Business acquisition, fraction of shares issuable to United's common shareholders			0.057794
Business acquisition exchange price per share			$1.30
Consideration paid in shares, value			2,954,000
Consideration paid in shares			1,617,027
Estimate value of the consideration			33,309,000
Direct stock issuance cost charged against additional paid in capital			272,000
Acquisition expense charged to other noninterest expense			$368,000
Fair value determinant description	One year after the closing date of the acquisition
Prior Acquisition [Member]
Business Acquisition [Line Items]
Number of acquisitions prior to fiscal year	0

Business_Combinations_Summary_

Business Combinations - Summary of Estimated Fair Value of Assets and Liabilities Acquired (Detail) (USD $)	0 Months Ended	12 Months Ended	0 Months Ended
	Aug. 29, 2014	Dec. 31, 2014	Dec. 15, 2014
Business Acquisition [Line Items]
Cash and cash equivalents			$37,072,000
Assets:
Cash and cash equivalents			37,072,000
Factored receivables			149,926,000
Premises and equipment, net			8,940,000
Goodwill		28,834,000	5,719,000
Total Assets			233,227,000
Investment securities			25,410,000
Liabilities:
Total Liabilities			205,637,000
Loans			149,926,000
Net loans			149,926,000
Premises and equipment, net			8,940,000
Core deposit intangible			1,776,000
Bank owned life insurance			2,151,000
Other real estate and repossessions			558,000
Other assets			7,394,000
Total Assets			233,227,000
Non-interest bearing			50,007,000
Interest-bearing			150,539,000
Total Deposits			200,546,000
FHLB advances			4,874,000
Other liabilities			217,000
Total Liabilities			205,637,000
Net identifiable assets acquired over liabilities assumed			27,590,000
Goodwill		28,834,000	5,719,000
Net assets acquired over liabilities assumed			33,309,000
Fair Value Adjustments [Member]
Assets:
Factored receivables			-2,246,000
Premises and equipment, net			648,000
Goodwill			5,719,000
Total Assets			-923,000
Investment securities			-966,000
Liabilities:
Total Liabilities			9,000
Loans			-4,408,000
Allowance for loan losses			-2,162,000
Net loans			-2,246,000
Premises and equipment, net			648,000
Core deposit intangible			1,776,000
Other real estate and repossessions			-260,000
Other assets			125,000
Total Assets			-923,000
FHLB advances			9,000
Total Liabilities			9,000
Net identifiable assets acquired over liabilities assumed			-932,000
Goodwill			5,719,000
Net assets acquired over liabilities assumed			4,787,000
CBI [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	2,233,000
Assets:
Cash and cash equivalents	2,233,000
Factored receivables	81,559,000
Premises and equipment, net	444,000
Other assets	157,000
Goodwill	23,115,000	23,115,000
Total Assets	107,508,000
Liabilities:
Other liabilities	6,592,000
Note payable	77,801,000
Total Liabilities	84,393,000
Non controlling interest	6,934,000
Purchase price	16,181,000	16,181,000
Net loans	81,559,000
Premises and equipment, net	444,000
Total Assets	107,508,000
Total Liabilities	84,393,000
Goodwill	23,115,000	23,115,000
United Group Banking Company of Florida [Member]
Business Acquisition [Line Items]
Cash and cash equivalents			37,072,000
Assets:
Cash and cash equivalents			37,072,000
Factored receivables			152,172,000
Premises and equipment, net			8,292,000
Goodwill		5,719,000	5,719,000
Total Assets			234,150,000
Investment securities			26,376,000
Liabilities:
Total Liabilities			205,628,000
Loans			154,334,000
Allowance for loan losses			2,162,000
Purchase price			2,950,000
Net loans			152,172,000
Premises and equipment, net			8,292,000
Bank owned life insurance			2,151,000
Other real estate and repossessions			818,000
Other assets			7,269,000
Total Assets			234,150,000
Non-interest bearing			50,007,000
Interest-bearing			150,539,000
Total Deposits			200,546,000
FHLB advances			4,865,000
Other liabilities			217,000
Total Liabilities			205,628,000
Net identifiable assets acquired over liabilities assumed			28,522,000
Goodwill		5,719,000	5,719,000
Net assets acquired over liabilities assumed			28,522,000
Shares of common stock issued			1,617,027
Estimated value per share of the Company's stock			$18.72
Fair value of Company stock issued			30,271,000
Cash exchanged for shares and cash in lieu			2,954,000
Value of assumed stock options			84,000
Fair value of total consideration transferred			$33,309,000

Business_Combinations_Schedule

Business Combinations - Schedule of Supplemental Pro Forma Information (Detail) (CBI [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
CBI [Member]
Business Acquisition [Line Items]
Net interest income - pro forma (unaudited)	$42,281	$36,073
Net earnings - pro forma (unaudited)	$7,166	$5,401
Diluted earnings per common share (unaudited)	$0.96	$0.73

Business_Combinations_Summary_1

Business Combinations - Summary of Loans at Acquisition Date (Detail) (USD $)	Dec. 15, 2014
In Thousands, unless otherwise specified	Dec. 15, 2014
Loans At Acquisition Date [Line Items]
Acquired Impaired Loans	$9,027
Acquired Performing Loans	140,899
Total Acquired Loans	149,926
Commercial, financial, and agricultural [Member]
Loans At Acquisition Date [Line Items]
Acquired Impaired Loans	929
Acquired Performing Loans	22,274
Total Acquired Loans	23,203
Real estate - mortgage [Member]
Loans At Acquisition Date [Line Items]
Acquired Impaired Loans	6,844
Acquired Performing Loans	105,361
Total Acquired Loans	112,205
Real estate - construction [Member]
Loans At Acquisition Date [Line Items]
Acquired Impaired Loans	918
Acquired Performing Loans	7,377
Total Acquired Loans	8,295
Consumer [Member]
Loans At Acquisition Date [Line Items]
Acquired Impaired Loans	336
Acquired Performing Loans	5,887
Total Acquired Loans	$6,223

Business_Combinations_Summary_2

Business Combinations - Summary of Purchased Credit-Impaired Loans at Acquisition (Detail) (USD $)	0 Months Ended
In Thousands, unless otherwise specified	Dec. 15, 2014	Dec. 31, 2014
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]
Contractually required principal and interest payments	$11,956
Non-accretable difference	2,929
Cash flows expected to be collected	9,027
Accretable discount	0
Fair value of loans acquired with a deterioration of credit quality	$9,027	$1,480

Business_Combinations_Summary_3

Business Combinations - Summary of Changes in Carrying Amount of Accretable Yield on Acquired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 15, 2014
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]
Acquisition of United	$1,480	$9,027
Accretion	-13
Net transfers from non-accretable difference to accretable yield	0
Balance, end of year	$1,467

Investment_Securities_Summary_

Investment Securities - Summary of Available for Sale Securities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	$33,632	$47,532
Investment securities available-for-sale, Gross Unrealized Gains	1,417	1,081
Investment securities available-for-sale, Gross Unrealized Losses	117	634
Investment securities available-for-sale, Estimated Fair Value	34,932	47,979
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	1,501
Investment securities available-for-sale, Estimated Fair Value	1,501
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	27,723	33,123
Investment securities available-for-sale, Gross Unrealized Gains	1,138	1,022
Investment securities available-for-sale, Gross Unrealized Losses	111	403
Investment securities available-for-sale, Estimated Fair Value	28,750	33,742
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	4,408	4,409
Investment securities available-for-sale, Gross Unrealized Gains	279	59
Investment securities available-for-sale, Gross Unrealized Losses	6	198
Investment securities available-for-sale, Estimated Fair Value	4,681	4,270
Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost		10,000
Investment securities available-for-sale, Gross Unrealized Losses		33
Investment securities available-for-sale, Estimated Fair Value		$9,967

Investment_Securities_Schedule

Investment Securities - Schedule of Investment Securities with Unrealized Losses (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months Fair Value		$20,462
Less than 12 Months Unrealized Losses		634
12 Months or More Fair Value	8,199
12 Months or More Unrealized Losses	117
Total Fair Value	8,199	20,462
Total Unrealized Losses	117	634
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months Fair Value		8,409
Less than 12 Months Unrealized Losses		403
12 Months or More Fair Value	7,705
12 Months or More Unrealized Losses	111
Total Fair Value	7,705	8,409
Total Unrealized Losses	111	403
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months Fair Value		2,086
Less than 12 Months Unrealized Losses		198
12 Months or More Fair Value	494
12 Months or More Unrealized Losses	6
Total Fair Value	494	2,086
Total Unrealized Losses	6	198
Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months Fair Value		9,967
Less than 12 Months Unrealized Losses		33
Total Fair Value		9,967
Total Unrealized Losses		$33

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sale of securities available-for-sale	$35,377,000	$952,000	$0
Realized gross gain (loss) from sale of investment	-33,000	47,000
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total number of securities	13	14
Number of securities in loss position	3	3
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total number of securities	9	9
Number of securities in loss position	1	4
Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in loss position		1
Securities Pledged [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities carrying value	$34,633,000	$35,206,000

Investment_Securities_Schedule1

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities Available-For-Sale (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	$33,632	$47,532
Investment securities available-for-sale, Estimated Fair Value	34,932	47,979
Municipal and U.S. Treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
0 to 5 years, Amortized Cost	1,501
5 to 10 years, Amortized Cost	1,047
Over 10 years, Amortized Cost	3,361
0 to 5 years, Fair Value	1,501
5 to 10 years, Fair Value	1,101
Over 10 years, Fair Value	3,580
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	27,723
Investment securities available-for-sale, Amortized Cost	27,723	33,123
Investment securities available-for-sale, Estimated Fair Value	28,750
Investment securities available-for-sale, Estimated Fair Value	$28,750	$33,742

Loans_Summary_of_Major_Classif

Loans - Summary of Major Classifications of Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$889,150	$582,549
Less: Unearned fees	429	547
Total loans and leases	888,721	582,002
Allowance for loan losses	-9,802	-9,119	-10,020	-10,343
Total net loans and leases	878,919	572,883
Commercial, Financial, and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	131,657
Allowance for loan losses	-1,523	-1,398	-1,158	-1,423
Real Estate - Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	577,268	403,053
Allowance for loan losses	-5,047	-4,449	-5,094	-5,509
Real Estate - Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	83,663	58,372
Allowance for loan losses	-647	-964	-497	-1,071
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,962
Allowance for loan losses	-562	-243	-169	-90
Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		6
Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	131,657	115,005
Adjustments [Member] \| Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,962	6,113
Receivables Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	82,600
Allowance for loan losses	($955)

Loans_Summary_of_Allowance_for

Loans - Summary of Allowance for Loan Losses (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	$9,119	$10,020	$10,343
Provisions charged to operating expense	978		125
Loans charged off	-1,088	-1,589	-2,114
Recoveries	793	688	1,666
Balance, end of year	9,802	9,119	10,020
Ending balance, individually evaluated for impairment	873
Ending balance, collectively evaluated for impairment	8,929	9,119	10,020
Loans:
Individually evaluated for impairment	3,881	3,371	244
Collectively evaluated for impairment	876,192	579,178	441,730
Acquired loans with deteriorated credit quality	9,077
Receivables Factoring [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provisions charged to operating expense	978
Loans charged off	-656
Recoveries	633
Balance, end of year	955
Ending balance, individually evaluated for impairment	473
Ending balance, collectively evaluated for impairment	482
Loans:
Individually evaluated for impairment	1,605
Collectively evaluated for impairment	80,995
Commercial, Financial, and Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	1,398	1,158	1,423
Provisions charged to operating expense	61	-47	-435
Loans charged off	-3	-32	-41
Recoveries	67	319	211
Balance, end of year	1,523	1,398	1,158
Ending balance, collectively evaluated for impairment	1,523	1,398	1,158
Loans:
Individually evaluated for impairment		27
Collectively evaluated for impairment	130,656	114,978	92,147
Acquired loans with deteriorated credit quality	1,001
Real Estate - Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	4,449	5,094	5,509
Provisions charged to operating expense	988	864	-397
Loans charged off	-429	-1,557	-409
Recoveries	39	49	391
Balance, end of year	5,047	4,449	5,094
Ending balance, individually evaluated for impairment	350
Ending balance, collectively evaluated for impairment	4,697	4,449	5,094
Loans:
Individually evaluated for impairment	2,078	3,344	244
Collectively evaluated for impairment	568,363	399,709	302,873
Acquired loans with deteriorated credit quality	6,827
Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	964	497	1,071
Provisions charged to operating expense	-350	162	-303
Loans charged off			-1,292
Recoveries	33	305	1,021
Balance, end of year	647	964	497
Ending balance, individually evaluated for impairment	50
Ending balance, collectively evaluated for impairment	597	964	497
Loans:
Individually evaluated for impairment	198
Collectively evaluated for impairment	82,551	58,372	36,267
Acquired loans with deteriorated credit quality	914
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	243	169	90
Provisions charged to operating expense	298	58	408
Loans charged off			-372
Recoveries	21	15	43
Balance, end of year	562	243	169
Ending balance, collectively evaluated for impairment	562	243	169
Loans:
Collectively evaluated for impairment	13,627	6,113	10,030
Acquired loans with deteriorated credit quality	335
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year		4	29
Provisions charged to operating expense		-3	-25
Balance, end of year			4
Ending balance, collectively evaluated for impairment			4
Loans:
Collectively evaluated for impairment		6	413
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	2,065	3,098	2,221
Provisions charged to operating expense	-997	-1,034	877
Balance, end of year	1,068	2,065	3,098
Ending balance, collectively evaluated for impairment	$1,068	$2,065	$3,098

Loans_Impaired_Loans_by_Class_

Loans - Impaired Loans by Class of Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Impaired loans without related allowance, Recorded Investment	$1,052	$3,371
Total impaired loans, Recorded Investment	3,881
Impaired loans without related allowance, Unpaid Principal Balance	2,030	4,665
Total impaired loans, Unpaid Principal Balance	4,859
Impaired loans without related allowance, Average Recorded Investment	1,794	2,077
Impaired loans with related allowance, Recorded Investment	2,829
Impaired loans with related allowance, Unpaid Principal Balance	2,829
Total impaired loans, Related Allowance	873
Impaired loans with related allowance, Average Recorded Investment	566
Total impaired loans, Average Recorded Investment	2,360
Commercial, Financial, and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without related allowance, Recorded Investment		27
Impaired loans without related allowance, Unpaid Principal Balance		236
Impaired loans without related allowance, Average Recorded Investment	24	2
Total impaired loans, Average Recorded Investment	24
Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without related allowance, Recorded Investment	1,052	3,344
Total impaired loans, Recorded Investment	2,078
Impaired loans without related allowance, Unpaid Principal Balance	2,030	4,429
Total impaired loans, Unpaid Principal Balance	3,056
Impaired loans without related allowance, Average Recorded Investment	1,770	2,075
Impaired loans with related allowance, Recorded Investment	1,026
Impaired loans with related allowance, Unpaid Principal Balance	1,026
Total impaired loans, Related Allowance	350
Impaired loans with related allowance, Average Recorded Investment	205
Total impaired loans, Average Recorded Investment	1,975
Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans, Recorded Investment	198
Total impaired loans, Unpaid Principal Balance	198
Impaired loans with related allowance, Recorded Investment	198
Impaired loans with related allowance, Unpaid Principal Balance	198
Total impaired loans, Related Allowance	50
Impaired loans with related allowance, Average Recorded Investment	40
Total impaired loans, Average Recorded Investment	40
Receivables Factoring [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans, Recorded Investment	1,605
Total impaired loans, Unpaid Principal Balance	1,605
Impaired loans with related allowance, Recorded Investment	1,605
Impaired loans with related allowance, Unpaid Principal Balance	1,605
Total impaired loans, Related Allowance	473
Impaired loans with related allowance, Average Recorded Investment	321
Total impaired loans, Average Recorded Investment	$321

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Principal balance on loan acquired with deteriorated credit quality	$378,000,000	$402,000,000
Non-accretable discount	$71,000	$71,000

Loans_Summary_of_Aging_of_Reco

Loans - Summary of Aging of Recorded Investment in Past Due and Non-accrual Loan (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days 6 Past Due	$6,904	$343
0-89 Days Past Due	2,976
> 90 Days Past Due	1,921	2,579
Total Past Due	11,801	2,922
Current	877,349	579,627
Total	889,150	582,549
Non-accrual	4,865	3,371
Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	131,657
Total	131,657
Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days 6 Past Due	191	343
0-89 Days Past Due	1,963
> 90 Days Past Due	1,572	2,579
Total Past Due	3,726	2,922
Current	573,542	400,131
Total	577,268	403,053
Non-accrual	4,133	3,344
Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days 6 Past Due	198
Total Past Due	198
Current	83,465	58,372
Total	83,663	58,372
Non-accrual	676
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days 6 Past Due	188
> 90 Days Past Due	132
Total Past Due	320
Current	13,642
Total	13,962
Non-accrual	56
Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		6
Total		6
Receivables Factoring [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days 6 Past Due	6,327
0-89 Days Past Due	1,013
> 90 Days Past Due	217
Total Past Due	7,557
Current	75,043
Total	82,600
Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		115,005
Total	131,657	115,005
Non-accrual		27
Adjustments [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		6,113
Total	$13,962	$6,113

Loans_Summary_of_Risk_Category

Loans - Summary of Risk Category of Loans By Class of Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans	$889,150	$582,549
Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	131,657
Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	577,268	403,053
Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	83,663	58,372
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	13,962
Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		6
Receivables Factoring [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	82,600
Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	131,657	115,005
Adjustments [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	13,962	6,113
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	872,045	568,887
Pass [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	129,314
Pass [Member] \| Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	565,992	392,568
Pass [Member] \| Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	82,552	58,372
Pass [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	13,192
Pass [Member] \| Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		6
Pass [Member] \| Receivables Factoring [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	80,995
Pass [Member] \| Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		111,828
Pass [Member] \| Adjustments [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		6,113
OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,511	5,086
OAEM [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,159
OAEM [Member] \| Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,057	3,829
OAEM [Member] \| Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	94
OAEM [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	201
OAEM [Member] \| Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		1,257
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,718	5,205
Substandard [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,184
Substandard [Member] \| Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,803	3,312
Substandard [Member] \| Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	254
Substandard [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	477
Substandard [Member] \| Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		1,893
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,876	3,371
Doubtful [Member] \| Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,416	3,344
Doubtful [Member] \| Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	763
Doubtful [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	92
Doubtful [Member] \| Receivables Factoring [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,605
Doubtful [Member] \| Adjustments [Member] \| Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		$27

Premises_and_Equipment_Summary

Premises and Equipment - Summary of Premises and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Premises and equipment gross	$34,214	$19,122
Less accumulated depreciation	6,654	2,941
Premises and equipment net	27,560	16,181
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment gross	11,389	3,205
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment gross	12,525	6,500
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment gross	5,854	2,904
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment gross	3,045	2,377
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment gross	1,348	4,136
Automobile [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment gross	$53

Premises_and_Equipment_Additio

Premises and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Depreciation expense	$836,000	$737,000	$553,000

Deposits_Additional_Informatio

Deposits - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Customer	Customer	Dec. 31, 2012
Schedule Of Deposits [Line Items]
Time deposits greater than or equal to $100,000	$85,302,000	$86,491,000
Aggregate deposits	206,207,000	138,063,000
Brokered certificates of deposits	48,935,000		0
Average weighted rate	0.81%
Customer [Member]
Schedule Of Deposits [Line Items]
Number of customers	1	2
Aggregate deposits	$66,411,000,000	$72,250,000,000
Percentage of bank deposits	7.00%	11.00%

Deposits_Summary_of_Contractua

Deposits - Summary of Contractual Maturities of Time Deposits (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
2015	$107,492
2016	45,383
2017	30,051
2018	16,414
2019	6,867
Total	$206,207	$138,063

Federal_Home_Loan_Bank_Advance2

Federal Home Loan Bank Advances and Borrowings - Summary of Advances Outstanding from FHLB (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advance	$22,000
Outstanding FHLB Advance 1 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advance	2,000
Interest Basis	Fixed
Current Rate	4.06%
Maturity	1-Feb-19
Outstanding FHLB Advance 2 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advance	15,000
Interest Basis	Fixed
Current Rate	1.04%
Maturity	26-Jan-16
Outstanding FHLB Advance 3 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advance	$5,000
Interest Basis	Fixed
Current Rate	3.96%
Maturity	2-Jul-18

Federal_Home_Loan_Bank_Advance3

Federal Home Loan Bank Advances and Borrowings - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Pledged under blanket floating liens	$471,481,000	$409,911,000
Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Outstanding unfunded standby letters of credit	98,345,000
Additional borrowing capacity under its borrowing arrangement with the FHLB	111,032,000
Available lines of credit for overnight borrowings	$84,600,000

Income_Taxes_Schedule_of_Compo

Income Taxes - Schedule of Components of Income Tax Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current	$2,607	$409	$71
Deferred	28	550	-240
Expense of operating loss carryforwards	536	1,351	1,240
Change in valuation allowance	-12
Income tax expense	$3,159	$2,310	$1,071

Income_Taxes_Schedule_of_Diffe

Income Taxes - Schedule of Difference Between Income Tax Expense and Amount Computed by Applying Statutory Federal Income Tax Rate to Income Before Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Pretax income at statutory rate	$3,085	$2,147	$1,064
State income tax expense, net	224	251	125
Cash surrender value income	-83	-80	-66
Tax exempt interest	-65	-56	-68
Minority interest	-174
Merger related expenses	111
Change in valuation allowance	-12
Other	73	48	16
Income tax expense	$3,159	$2,310	$1,071

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Taxes (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred income tax assets:
Loans and allowance for loan losses	$4,471	$2,501
Accrued expenses	106	107
Operating loss carryforwards and credits	7,037	3,260
Premises and equipment	283	672
Capital loss carryforward		14
Non-accrual interest income	31	75
Stock-based compensation	479	347
Other real estate	99	32
Investment in pass through entity	208
Other	157	164
Total gross deferred income tax assets	12,871	7,172
Less valuation allowance		-12
Net deferred income tax assets	12,871	7,160
Deferred income tax liabilities:
Unrealized gains on investment securities available-for-sale	455	156
Prepaid expenses	182	154
Core deposit intangible	668
Goodwill	122
Leases		93
Total gross deferred income tax liabilities	1,427	403
Net deferred income tax assets	$11,444	$6,757

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Net operating loss carryforward, federal taxes	$18,850,000
Net operating loss carryforward, state taxes	$12,300,000
Year of expiration of operating loss carryforward, federal taxes	2029
Year of expiration of operating loss carryforward, state taxes	2024

Commitments_Financial_Instrume

Commitments - Financial Instrument Whose Contract Amounts Represent Credit Risk (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Commitments to Extend Credit [Member]
Product Royalty Future Minimum Payment Due [Line Items]
Commitments to extend credit	$182,820,000	$141,887,000
Standby Letters of Credit [Member]
Product Royalty Future Minimum Payment Due [Line Items]
Stand-by letters of credit	$8,085,000	$4,066,000

Commitments_Additional_Informa

Commitments - Additional Information (Detail) (USD $)	12 Months Ended
Commitments - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Total rent expense	$445,000	$457,000	$494,000

Commitments_Future_Minimum_Ren

Commitments - Future Minimum Rent on Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, 2015	$739
Operating Leases, 2016	388
Operating Leases, 2017	311
Operating Leases, 2018	192
Operating Leases, 2019	0
Operating Leases, Thereafter	0
Operating Leases, Total	$1,630

Derivative_Financial_Instrumen2

Derivative Financial Instruments and Hedging Transactions - Schedule of Fair Values and Notional Amounts of Company's Derivative Instruments (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Interest Rate Swaps Designated As Fair Value Hedges [Member] \| Other Liabilities [Member]
Derivative [Line Items]
Total derivative liabilities fair value	($417)
Total derivative liabilities notional amount	16,674
Interest Rate Swaps Designated As Fair Value Hedges [Member] \| Other Assets [Member]
Derivative [Line Items]
Total derivative assets fair value		62
Total derivative assets notional amount		17,264
Interest Rate Swaps With Customers [Member] \| Other Liabilities [Member]
Derivative [Line Items]
Total derivative liabilities fair value	-7	-352
Total derivative liabilities notional amount	9,646	10,018
Reciprocal Interest Rate Swaps [Member] \| Other Assets [Member]
Derivative [Line Items]
Total derivative assets fair value	7	352
Total derivative assets notional amount	$9,646	$10,018

Derivative_Financial_Instrumen3

Derivative Financial Instruments and Hedging Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gain or loss from derivatives designated as fair value hedges	$128,000	$16,000	$0

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Options assumed	102,586
Percentage of savings of salary income on a pre-tax or after-tax basis	15.00%
Matching employer contribution percentage	50.00%
Employer contribution deferred by eligible participants percentage	3.00%
Matching contribution expense recognized	$119,000	$142,000
Discretionary contribution expense			80,000
2011 Equity Incentive Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total shares reserved for possible issuance	500,000
Issuance of stock option	0	0	0
Options outstanding, weighted average remaining contractual life	6 years
Options exercisable, weighted average remaining contractual life	6 years
Unrecognized compensation expense	0
Compensation expense related to stock options recognized	0	0	0
2011 Equity Incentive Plan [Member] \| Performance Shares [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized compensation expense	756,000
Compensation expense related to stock options recognized	$358,000	$293,000	$112,000
Share awards vesting period	5 years
2011 Equity Incentive Plan [Member] \| United Group Banking Company of Florida [Member]
Defined Benefit Plan Disclosure [Line Items]
Options assumed	102,586

Employee_Benefit_Plans_Summary

Employee Benefit Plans - Summary of Activity Related to Outstanding Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, Beginning of year, Shares	220,500	220,500	220,500
Granted, Shares	0	0	0
Assumed, Shares	102,586
Exercised, Shares	-1,000
Forfeited, Shares	0	0	0
Outstanding, End of year, Shares	322,086	220,500	220,500
Exercisable, end of year	322,086	220,500	220,500
Outstanding, beginning of year, Weighted Average Exercise Price	$14.57	$14.57	$14.57
Granted, Weighted Average Exercise Price	$0	$0	$0
Assumed, Weighted Average Exercise Price	$23.45
Exercised, Weighted Average Exercise Price	$14.57
Forfeited, Weighted Average Exercise Price	$0	$0	$0
Outstanding, end of year, Weighted Average Exercise Price	$17.40	$14.57	$14.57
Exercisable, end of year, Weighted Average Exercise Price	$17.40	$14.57	$14.57

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Related Party Transactions [Abstract]
Deposits from directors, executive officers and their related interests	$24,746,000	$8,737,000

Related_Party_Transactions_Sum

Related Party Transactions - Summary of Activity for Related Party Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Related Party Transactions [Abstract]
Beginning balance	$518
New loans	268
Repayments	-210
Changes in related parties	2,261
Ending balance	$2,837

Shareholders_Equity_Additional

Shareholder's Equity - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Apr. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Warrants issued		247,500
Warrants issued price per share		$20
Warrants vested period		5 years
Warrants exercisable period		10 years
Warrants outstanding		30,000
Warrants expiration date		2014-06
Sale of common stock, Shares		163,485
Sale of common stock per share		$18.35
Raised from the sale of common stock		$2,972,000
Common stock net offering expenses		$28,000
Fractional shares were cashed out and totaled	17.5
Common Stock - Non-Voting [Member]
Class of Warrant or Right [Line Items]
Common stock, par value			$1
Predecessor [Member] \| Common Stock - Non-Voting [Member] \| Common Stock [Member]
Class of Warrant or Right [Line Items]
Common stock, par value	1
Successor [Member] \| Common Stock [Member]
Class of Warrant or Right [Line Items]
Common stock, par value	0.01

Regulatory_Matters_Companys_an

Regulatory Matters - Company's and National Bank of Commerce's Capital Amounts and Ratios (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
National Commerce Corporation [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) Actual, Amount	$106,289	$92,718
Total Capital (to Risk Weighted Assets) Actual. Ratio	11.75%	15.83%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Amount	72,367	46,847
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital (to Risk Weighted Assets) Actual, Amount	96,487	85,376
Tier 1 Capital (to Risk Weighted Assets) Actual, Ratio	10.66%	14.58%
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Amount	36,205	23,423
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets) Actual, Amount	96,487	85,376
Tier 1 Capital (to Average Assets) Actual, Ratio	10.68%	12.18%
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes, Amount	36,137	28,043
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes, Ratio	4.00%	4.00%
National Bank of Commerce [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) Actual, Amount	84,148	91,918
Total Capital (to Risk Weighted Assets) Actual. Ratio	11.42%	15.71%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Amount	58,948	46,803
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Amount)	73,685	58,504
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets) Actual, Amount	74,927	84,583
Tier 1 Capital (to Risk Weighted Assets) Actual, Ratio	10.16%	14.46%
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Amount	29,499	23,402
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Amount	44,248	35,103
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets) Actual, Amount	74,927	84,583
Tier 1 Capital (to Average Assets) Actual, Ratio	8.57%	12.07%
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes, Amount	34,972	28,042
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Action Provisions, Amount	43,715	35,053
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Action Provisions, Ratio	5.00%	5.00%
United Legacy Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) Actual, Amount	18,731
Total Capital (to Risk Weighted Assets) Actual. Ratio	11.31%
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Amount	13,249
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Ratio	8.00%
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Amount)	16,561
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Ratio	10.00%
Tier 1 Capital (to Risk Weighted Assets) Actual, Amount	18,731
Tier 1 Capital (to Risk Weighted Assets) Actual, Ratio	11.31%
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Amount	6,625
Tier 1 Capital (to Risk Weighted Assets) For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Amount	9,937
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Action Provisions, Ratio	6.00%
Tier 1 Capital (to Average Assets) Actual, Amount	18,731
Tier 1 Capital (to Average Assets) Actual, Ratio	8.60%
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes, Amount	8,712
Tier 1 Capital (to Average Assets) For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Action Provisions, Amount	$10,890
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Action Provisions, Ratio	5.00%

Fair_Value_Measurements_and_Di2

Fair Value Measurements and Disclosures - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	$28,750	$33,742
Investment in mutual fund	34,932	47,979
Derivative assets	105	493
Derivative liability	425	352
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund	1,501
Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund	4,681	4,270
Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund		9,967
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund	1,501
Level 1 [Member] \| US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund	1,501
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	28,750	33,742
Investment in mutual fund	33,431	47,979
Derivative assets	105	493
Derivative liability	425	352
Level 2 [Member] \| Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund	4,681	4,270
Level 2 [Member] \| Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in mutual fund		$9,967

Fair_Value_Measurements_and_Di3

Fair Value Measurements and Disclosures - Summary of Assets Measured at Fair Value on Nonrecurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate and repossessed assets	$1,380	$845
Impaired loans	4,865	3,371
Doubtful [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,865	3,371
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate and repossessed assets	1,380	845
Level 3 [Member] \| Doubtful [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$4,865	$3,371

Fair_Value_Measurements_and_Di4

Fair Value Measurements and Disclosures - Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$123,435	$124,136	$171,287	$49,312
Investment securities available-for-sale	34,932	47,979
Other investments	5,421	4,482
Loans, net	878,919	572,883
Mortgage loans held-for-sale	9,329	7,159
Bank owned life insurance	10,641	8,247
Derivative assets	105	493
Liabilities:
Deposits	971,060	678,031
Federal Home Loan Bank advances	22,000	22,000
Derivative liability	425	352
Level 1 [Member]
Assets
Investment securities available-for-sale	1,501
Level 2 [Member]
Assets
Investment securities available-for-sale	33,431	47,979
Derivative assets	105	493
Liabilities:
Derivative liability	425	352
Estimated Fair Value [Member] \| Level 1 [Member]
Assets
Cash and cash equivalents	123,435	124,136
Investment securities available-for-sale	1,501
Estimated Fair Value [Member] \| Level 2 [Member]
Assets
Investment securities available-for-sale	33,431	47,979
Other investments	5,421	4,482
Loans, net	873,125	566,207
Mortgage loans held-for-sale	9,329	7,159
Bank owned life insurance	10,640	8,247
Derivative assets	105	493
Liabilities:
Deposits	949,621	674,070
Federal Home Loan Bank advances	22,677	22,743
Derivative liability	425	352
Estimated Fair Value [Member] \| Level 3 [Member]
Assets
Loans, net	$4,865	$3,371

National_Commerce_Corporation_2

National Commerce Corporation (Parent Company Only) Financial Information - Balance Sheets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$14,236	$2,273
Other assets	2,953	1,682
Total assets	1,138,426	791,781	693,359
Liabilities and Shareholders' Equity
Other liabilities	8,774	2,335
Total liabilities	1,002,265	702,842
Commitments
Shareholders' equity:
Additional paid-in capital	131,455	91,774
Accumulated deficit	-3,453	-8,856
Accumulated other comprehensive income	845	291
Total shareholders' equity attributable to NCC	128,922	88,939
Noncontrolling interest	7,239
Total shareholders' equity	136,161	88,939	85,850	83,459
Total liabilities and shareholders' equity	1,138,426	791,781
Parent Company [Member]
Assets
Cash and due from banks	829	805
Investment in subsidiaries	133,909	87,609
Other assets	1,557	535
Total assets	136,295	88,949
Liabilities and Shareholders' Equity
Other liabilities	134	10
Total liabilities	134	10
Commitments
Shareholders' equity:
Common stock	75	5,730
Additional paid-in capital	131,455	91,774
Accumulated deficit	-3,453	-8,856
Accumulated other comprehensive income	845	291
Total shareholders' equity attributable to NCC	128,922	88,939
Noncontrolling interest	7,239
Total shareholders' equity	136,161	88,939
Total liabilities and shareholders' equity	$136,295	$88,949

National_Commerce_Corporation_3

National Commerce Corporation (Parent Company Only) Financial Information - Statements of Earnings (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income tax benefit	($3,159)	($2,310)	($1,071)
Net earnings	5,403	4,006	2,057
Parent Company [Member]
Income	0	0	0
Other expense	458	123	97
Total expenses	458	123	97
Loss before equity in undistributed earnings of subsidiaries	-458	-123	-97
Equity in undistributed earnings of subsidiaries	5,764	4,079	2,117
Income tax benefit	97	50	37
Net earnings	$5,403	$4,006	$2,057

National_Commerce_Corporation_4

National Commerce Corporation (Parent Company Only) Financial Information - Statements of Cash Flows (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net earnings	$5,403,000	$4,006,000	$2,057,000
Adjustments to reconcile net earnings to net cash provided (used) operating activities
Depreciation	836,000	737,000	553,000
Deferred income tax expense (benefit)	28,000	550,000	-240,000
Net cash provided (used) by operating activities	4,648,000	13,210,000	-1,164,000
Cash flows from investing activities
Net cash used by investing activities	-18,263,000	-155,461,000	-140,183,000
Cash flows from financing activities
Proceeds from stock offerings, net of offering expenses of $28	3,000,000
Net cash provided by financing activities	615,000
Net change in cash	-701,000	-47,151,000	121,975,000
Cash and cash equivalents at beginning of the period	124,136,000	171,287,000	49,312,000
Cash and cash equivalents at end of the period	123,435,000	124,136,000	171,287,000
Parent Company [Member]
Cash flows from operating activities:
Net earnings	5,403,000	4,006,000	2,057,000
Adjustments to reconcile net earnings to net cash provided (used) operating activities
Equity in undistributed earnings of subsidiaries	-5,764,000	-4,079,000	-2,117,000
Depreciation	1,000
Deferred income tax expense (benefit)	162,000	-81,000	-37,000
Change in other assets	-285,000
Change in other liabilities	121,000	10,000	-25,000
Net cash provided (used) by operating activities	-362,000	-144,000	-122,000
Cash flows from investing activities
Cash paid in acquisition	-3,201,000
Net cash used by investing activities	-3,201,000
Cash flows from financing activities
Proceeds from stock offerings, net of offering expenses of $28	2,972,000
Proceeds from exercise of stock options and warrants	615,000
Net cash provided by financing activities	3,587,000
Net change in cash	24,000	-144,000	-122,000
Cash and cash equivalents at beginning of the period	805,000	949,000	1,071,000
Cash and cash equivalents at end of the period	$829,000	$805,000	$949,000

National_Commerce_Corporation_5

National Commerce Corporation (Parent Company Only) Financial Information - Statements of Cash Flows (Parenthetical) (Detail) (Parent Company [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Parent Company [Member]
Supplemental Cash Flow Information [Line Items]
Proceeds from stock offering net of expenses	$28	$28	$28

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segments
Segment Reporting [Abstract]
Number of reportable segments	3

Segment_Reporting_Schedule_of_

Segment Reporting - Schedule of Reconciliation of Reportable Segment Revenue, Expenses and Profit (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest income	$31,342	$23,312	$19,952
Interest expense	2,869	2,613	3,280
Net interest income	28,473	20,699	16,672
Provision for loan and lease losses	978		125
Noninterest income	5,032	5,302	4,665
Noninterest expense	23,453	19,685	18,084
Earnings before income taxes	9,074	6,316	3,128
Income tax expense	3,159	2,310	1,071
Noncontrolling interest	-512
Net earnings	5,403	4,006	2,057
Total assets	1,138,426	791,781	693,359
Operating Segments [Member] \| Retail and Commercial Banking [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest income	27,144	22,893	19,517
Interest expense	2,746	2,471	3,128
Net interest income	24,398	20,422	16,389
Provision for loan and lease losses			125
Noninterest income	811	617	760
Noninterest expense	18,048	15,819	14,912
Earnings before income taxes	7,161	5,220	2,112
Income tax expense	2,627	1,894	685
Net earnings	4,534	3,326	1,427
Total assets	1,099,191	784,622	679,523
Operating Segments [Member] \| Mortgage Division [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest income	410	419	435
Interest expense	123	142	152
Net interest income	287	277	283
Noninterest income	4,199	4,685	3,905
Noninterest expense	3,681	3,866	3,172
Earnings before income taxes	805	1,096	1,016
Income tax expense	306	416	386
Net earnings	499	680	630
Total assets	9,329	7,159	13,836
Operating Segments [Member] \| Receivables Factoring [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest income	4,345
Interest expense	731
Net interest income	3,614
Provision for loan and lease losses	804
Noninterest income	22
Noninterest expense	1,724
Earnings before income taxes	1,108
Income tax expense	226
Noncontrolling interest	-512
Net earnings	370
Total assets	105,330
Elimination Entries [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest income	-557
Interest expense	-731
Net interest income	174
Provision for loan and lease losses	174
Total assets	($75,424)

Segment_Reporting_Schedule_of_1

Segment Reporting - Schedule of Reconciliation of Reportable Segment Revenue, Expenses and Profit (Parenthetical) (Detail) (Factoring Segment [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Factoring Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Funding costs of fed funds percentage	2.50%	2.50%	2.50%

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 15, 2014	Aug. 29, 2014
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Goodwill associated with acquisition	$28,834,000	$5,719,000
Core deposit intangible asset	1,757,000
Amortization expense for intangible assets	19,000
CBI [Member]
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Goodwill associated with acquisition	23,115,000		23,115,000
United Group Banking Company of Florida [Member]
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Goodwill associated with acquisition	5,719,000	5,719,000
Core deposit intangible asset	1,776,000
Core Deposits [Member]
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Amortized period of core deposit intangible	7 years
Core deposit intangible, gross	1,776,000
Core deposit intangible asset, accumulated amortization	19,000
Amortization expense for intangible assets	$18,000

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Summary of Estimated Amortization Expense (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified	Dec. 31, 2014
Intangible Liability Disclosure [Abstract]
2015	$441
2016	378
2017	314
2018	251
2019	187
Thereafter	186
Total	$1,757