CU Bancorp (CUNB) 10-Q 6 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 03, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Trading Symbol	CUNB
Entity Registrant Name	CU Bancorp
Entity Central Index Key	1,543,643
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		17,034,659

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 41,929	$ 33,996
Interest earning deposits in other financial institutions	269,298	98,590
Total cash and cash equivalents	311,227	132,586
Certificates of deposit in other financial institutions	58,674	76,433
Investment securities available-for-sale, at fair value	256,085	226,962
Investment securities held-to-maturity, at amortized cost	43,269	47,147
Total investment securities	299,354	274,109
Loans	1,771,347	1,624,723
Allowance for loan loss	(14,965)	(12,610)
Net loans	1,756,382	1,612,113
Premises and equipment, net	4,981	5,377
Deferred tax assets, net	17,241	16,504
Other real estate owned, net	1,292	850
Goodwill	63,950	63,950
Core deposit and leasehold right intangibles	8,138	9,547
Bank owned life insurance	49,548	38,732
Accrued interest receivable and other assets	33,220	34,916
Total Assets	2,604,007	2,265,117
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing demand deposits	1,248,348	1,032,634
Interest bearing transaction accounts	257,853	206,544
Money market and savings deposits	691,292	643,675
Certificates of deposit	62,320	64,840
Total deposits	2,259,813	1,947,693
Securities sold under agreements to repurchase	16,698	9,411
Subordinated debentures, net	9,657	9,538
Accrued interest payable and other liabilities	19,491	19,283
Total Liabilities	$ 2,305,659	$ 1,985,925
Commitments and Contingencies (Note 14)
SHAREHOLDERS' EQUITY
Serial Preferred Stock - authorized, 50,000,000 shares: Series A, non-cumulative perpetual preferred stock, $1,000 per share liquidation preference, 16,400 shares authorized, issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 16,739	$ 16,004
Common stock - authorized, 75,000,000 shares no par value, 16,870,936 shares issued and 16,910,936 shares outstanding at September 30, 2015, and 16,683,856 shares issued and outstanding at December 31, 2014	227,823	226,389
Additional paid-in capital	21,810	19,748
Retained earnings	31,713	16,861
Accumulated other comprehensive income	263	190
Total Shareholders' Equity	298,348	279,192
Total Liabilities and Shareholders' Equity	$ 2,604,007	$ 2,265,117

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Preferred stock, authorized shares	50,000,000	50,000,000
Common stock, shares authorized	75,000,000	75,000,000
Common stock, no par value
Common stock, shares issued	16,870,936	16,683,856
Common stock, shares outstanding	16,910,936	16,683,856
Series A Preferred Stock
Preferred stock, liquidation preference per share	$ 1	$ 1
Preferred stock, authorized shares	16,400	16,400
Preferred stock, shares issued	16,400	16,400
Preferred stock, shares outstanding	16,400	16,400

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Income
Interest and fees on loans	$ 21,689	$ 12,401	$ 62,239	$ 36,691
Interest on investment securities	1,124	589	3,355	1,557
Interest on interest bearing deposits in other financial institutions	293	248	741	665
Total Interest Income	23,106	13,238	66,335	38,913
Interest Expense
Interest on interest bearing transaction accounts	105	70	303	194
Interest on money market and savings deposits	427	225	1,218	681
Interest on certificates of deposit	53	58	150	169
Interest on securities sold under agreements to repurchase	9	8	21	27
Interest on subordinated debentures	110	109	326	323
Total Interest Expense	704	470	2,018	1,394
Net Interest Income	22,402	12,768	64,317	37,519
Provision for loan losses	705	35	2,831	518
Net Interest Income After Provision For Loan Losses	21,697	12,733	61,486	37,001
Non-Interest Income
Gain on sale of SBA loans, net	640	331	1,278	936
Deposit account service charge income	1,159	631	3,453	1,891
Other non-interest income	1,189	1,042	3,960	2,750
Total Non-Interest Income	2,988	2,004	8,691	5,577
Non-Interest Expense
Salaries and employee benefits (includes stock based compensation expense of $810 and $445 for the three months, and $2,130 and $1,332 for the nine months ended September 30, 2015 and 2014, respectively)	9,744	6,066	28,175	17,886
Occupancy	1,465	999	4,300	2,970
Data processing	596	472	1,872	1,423
Legal and professional	412	456	1,914	1,390
FDIC deposit assessment	370	195	1,054	596
Merger expenses	146	631	498	1,128
OREO valuation write-downs and expenses	153	8	179	14
Office services expenses	383	219	1,204	721
Other operating expenses	1,798	985	5,696	3,150
Total Non-Interest Expense	15,067	10,031	44,892	29,278
Net Income Before Provision for Income Tax Expense	9,618	4,706	25,285	13,300
Provision for income tax expense	3,355	2,157	9,556	5,699
Net Income	6,263	2,549	15,729	7,601
Preferred stock dividends and discount accretion	293		877
Net Income available to common shareholders	$ 5,970	$ 2,549	$ 14,852	$ 7,601
Earnings Per Share
Basic earnings per share	$ 0.36	$ 0.23	$ 0.90	$ 0.70
Diluted earnings per share	$ 0.35	$ 0.23	$ 0.88	$ 0.68

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Stock based compensation expense	$ 810	$ 445	$ 2,130	$ 1,332

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 6,263	$ 2,549	$ 15,729	$ 7,601
Other Comprehensive Income, net of tax:
Net change in unrealized gains on available-for-sale investment securities	311	8	73	408
Other Comprehensive Income	311	8	73	408
Comprehensive Income	$ 6,574	$ 2,557	$ 15,802	$ 8,009

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity (Unaudited) - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Restricted Stock Units (RSUs)	Preferred Stock	Common Stock	Common StockRestricted Stock Units (RSUs)	Additional Paid in Capital	Additional Paid in CapitalRestricted Stock Units (RSUs)	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance (in shares) at Dec. 31, 2014			16,400	16,683,856
Beginning Balance at Dec. 31, 2014	$ 279,192		$ 16,004	$ 226,389		$ 19,748		$ 16,861	$ 190
Net issuance of restricted stock	68,625			68,625
Exercise of stock options (in shares)	158,315			158,315
Exercise of stock options	$ 1,434			$ 1,434
Stock based compensation expense related to employee stock options and restricted stock	2,130					2,130
Restricted stock repurchase		$ (856)					$ (856)
Restricted stock repurchase (in shares)					(39,860)
Excess tax benefit - stock based compensation	788					788
Preferred stock dividends and discount accretion	(142)		$ 735					(877)
Net Income	15,729							15,729
Other Comprehensive Income	73								73
Ending Balance (in shares) at Sep. 30, 2015			16,400	16,870,936
Ending Balance at Sep. 30, 2015	$ 298,348		$ 16,739	$ 227,823		$ 21,810		$ 31,713	$ 263

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income:	$ 15,729	$ 7,601
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,831	518
Provision for unfunded loan commitments	87	76
Stock based compensation expense	2,130	1,332
Depreciation	1,062	725
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	(1,038)	(3,947)
Net amortization from investment securities	2,343	1,133
Increase in bank owned life insurance	(947)	(463)
Amortization of core deposit intangibles	1,262	203
Amortization of time deposit premium	(10)	(13)
Net amortization of leasehold right intangible asset and liabilities	4	158
Accretion of subordinated debenture discount	119	119
Valuation write-downs on OREO	133
Gain on sale of SBA loans, net	(1,278)	(936)
Decrease (increase) in deferred tax assets	(790)	1,176
Decrease in accrued interest receivable and other assets	2,484	1,838
Increase (decrease) in accrued interest payable and other liabilities	(327)	255
Net excess in tax benefit on stock compensation	(788)	(477)
Increase (decrease) in fair value of derivative swap liability	591	(364)
Net cash provided by operating activities	23,597	8,934
Cash flows from investing activities:
Purchases of available-for-sale investment securities	(57,597)	(48,656)
Proceeds from repayment and maturities from investment securities	30,135	15,157
Loans originated, net of principal payments	(145,359)	(40,495)
Purchases of premises and equipment	(666)	(842)
Net increase (decrease) in certificates of deposit in other financial institutions	17,759	(14,166)
Purchase of bank owned life insurance	(9,869)
Net cash (used in) investing activities	(165,597)	(89,002)
Cash flows from financing activities:
Net increase in Non-interest bearing demand deposits	215,714	66,059
Net increase (decrease) in Interest bearing transaction accounts	51,309	(9,836)
Net increase (decrease) in Money market and savings deposits	47,617	(14,970)
Net decrease in Certificates of deposit	(2,510)	(10,716)
Net increase in Securities sold under agreements to repurchase	7,287	2,477
Net proceeds from stock options exercised	1,434	1,277
Restricted stock repurchase	(856)	(246)
Dividends paid on preferred stock	(142)
Net excess in tax benefit on stock compensation	788	477
Net cash provided by financing activities	320,641	34,522
Net increase (decrease) in cash and cash equivalents	178,641	(45,546)
Cash and cash equivalents, beginning of year	132,586	241,287
Cash and cash equivalents, end of period	311,227	195,741
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	2,127	1,301
Cash paid during the period for taxes	6,767	2,550
Supplemental disclosures of non-cash investing activities:
Net change in unrealized gain on available-for-sale investment securities, net of tax	73	408
Loans transferred to other real estate owned	$ 575	$ 219

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Basis of Financial Statement Presentation	Note 1 - Basis of Financial Statement Presentation CU Bancorp (the “Company”) is a bank holding company whose operating subsidiary is California United Bank. CU Bancorp was established to facilitate the reorganization and merger of Premier Commercial Bank, N.A. into California United Bank, which took place after the close of business on July 31, 2012. As a bank holding company, CU Bancorp is subject to regulation of the Federal Reserve Board (“FRB”). The term “Company”, as used throughout this document, refers to the consolidated financial statements of CU Bancorp and California United Bank. California United Bank (the “Bank”) is a full-service commercial business bank offering a broad range of banking products and services including: deposit services, lending and cash management to small and medium-sized businesses, to non-profit organizations, to business principals and entrepreneurs, to the professional community, including attorneys, certified public accountants, financial advisors, healthcare providers and investors. The Bank opened for business in 2005, with its current headquarters office located in Los Angeles, California. As a state chartered non-member bank, the Bank is subject to regulation by the California Department of Business Oversight, (the “DBO”) and the Federal Deposit Insurance Corporation (“FDIC”). The deposits of the Bank are insured by the FDIC to the maximum amount allowed by law. The consolidated financial statements include the accounts of the Company and the Bank. Significant intercompany items have been eliminated in consolidation. The accounting and reporting policies of the Company conform to U.S. generally accepted accounting principles (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission. CU Bancorp is the common shareholder of Premier Commercial Statutory Trust I, Premier Commercial Statutory Trust II, and Premier Commercial Statutory Trust III, entities which were acquired in the merger with Premier Commercial Bancorp (“PC Bancorp”). These trusts were established for the sole purpose of issuing trust preferred securities and do not meet the criteria for consolidation in accordance with Accounting Standards Codification (“ASC”) 810, Consolidations Certain information and footnote disclosures presented in the annual consolidated financial statements are not included in the interim consolidated financial statements. Accordingly, the accompanying unaudited interim consolidated financial statements should be read in conjunction with our 2014 Annual Report on Form 10-K. In the opinion of management, the accompanying consolidated financial statements contain all necessary adjustments of a normal recurring nature, to present fairly the consolidated financial position of the Company and the results of its operations for the interim periods presented. Use of Estimates in the Preparation of Financial Statements The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In addition, these accounting principles require the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements. Estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan loss and various assets and liabilities measured at fair value. While management uses the most current available information to recognize losses on loans, future additions to the allowance for loan loss may be necessary based on, among other factors, changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan loss. Regulatory agencies may require the Company to recognize additions to the allowance for loan loss based on their judgment about information available to them at the time of their examination. Business Segments The Company is organized and operated as a single reporting segment, principally engaged in commercial business banking. The Company conducts its lending and deposit operations through ten full service branch offices located in Los Angeles, Orange, Ventura and San Bernardino counties.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2015
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Note 2 - Recent Accounting Pronouncements In November 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity. In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), Revenue from Contracts with Customers (Topic 606) In August 2015, the FASB issued ASU 2015-15, Interest—Imputation of Interest (Subtopic 835-30), Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805), Simplifying the Accounting for Measurement Period Adjustments

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Business Combinations	Note 3 - Business Combinations On November 30, 2014, the Company completed the merger with 1st Enterprise Bank (“1st Enterprise”) pursuant to the terms of the Agreement and Plan of Merger dated June 2, 2014, as amended (“Merger Agreement”). 1st Enterprise was merged with and into the Bank, with the Bank continuing as the surviving entity in the merger. Pursuant to the terms and conditions set forth in the Merger Agreement, each outstanding share of 1st Enterprise common stock (other than shares as to which the holder exercised dissenters’ rights) was converted into the right to receive 1.3450 of a share of CU Bancorp common stock, resulting in five million shares of CU Bancorp common stock issued. The fair value of the five million shares of common stock issued as part of the consideration paid ($103 million) was determined based on the closing market price ($19.60) of CU Bancorp common stock on November 30, 2014. The 16,400 shares of 1st Enterprise Non-Cumulative Perpetual Preferred Stock, Series D were converted into the right to receive 16,400 shares of CU Bancorp’s Non-Cumulative Perpetual Preferred Stock, Series A (“CU Bancorp Preferred Stock”). The U.S. Department of the Treasury is the sole holder of all outstanding shares of CU Bancorp Preferred Stock. As part of the Merger Agreement, CU Bancorp adopted the 1st Enterprise 2006 Stock Incentive Plan, as amended, as its own equity plan and all stock options granted by 1st Enterprise thereunder are exercisable for CU Bancorp common stock on substantially the same terms but adjusted to reflect the exchange ratio set forth in the Merger Agreement. See Note 16—Stock Options and Restricted Stock, in the Company’s 2014 Form 10-K, for more details. The merger was accounted for by the Company using the acquisition method of accounting. Accordingly, the assets and liabilities of 1st Enterprise were recorded at their respective fair values at acquisition date and represents management’s estimates based on available information. In connection with the merger, the consideration paid, the assets acquired, and the liabilities assumed were recorded at fair value on the date of acquisition, as summarized in the following table (dollars in thousands): November 30, 2014 Assets acquired: Cash and due from banks $ 8,739 Interest earning deposits in other financial institutions 11,554 Investment securities available-for-sale 117,407 Investment securities held-to-maturity 47,457 Loans 553,183 Premises and equipment, net 1,830 Deferred tax asset 5,682 Goodwill 51,658 Core deposit and leasehold right intangibles 7,533 Bank owned life insurance 16,871 Accrued interest receivable and other assets 11,583 Total assets acquired $ 833,497 Liabilities assumed: Deposits $ 703,358 Accrued interest payable and other liabilities 1,856 Total liabilities assumed $ 705,214 Total consideration paid: CU Bancorp common stock issued $ 102,712 CU Bancorp preferred stock issued 15,921 Fair value of 1st Enterprise stock options 9,561 Cash paid to a dissenter shareholder 87 Cash in lieu of fractional shares paid to 1st Enterprise shareholders 2 Total Consideration $ 128,283 1st Enterprise operated as a full-service independent commercial banking institution in the Southern California market with three branches located in downtown Los Angeles, Orange County and the Inland Empire and a loan production office in the San Fernando Valley. 1st Enterprise and the Bank had complementary business models and both had developed strong commercial banking platforms and production capabilities, low-cost deposit bases and robust credit cultures. The Company expensed approximately $146,000 of merger expenses for the three months ended September 30, 2015 and $631,000 for the three months ended September 30, 2014. For the nine months ended September 30, 2015 and September 30, 2014, the Company expensed approximately $498,000 and $1 million of merger expenses, respectively. The other intangible assets are primarily related to core deposits and are being amortized on an accelerated basis over a period of approximately ten years in proportion to the related estimated benefits. The assets and liabilities of 1st Enterprise were accounted for at fair value and required either a third party analysis or an internal valuation analysis of fair value. An analysis was performed on loans, investment securities, contractual lease obligations, deferred compensation, deposits, premises and equipment, other assets, other liabilities and preferred stock as of the merger date. Balances that were considered to be at fair value at the date of acquisition were cash and cash equivalents, bank owned life insurance, derivatives, other assets (interest receivable), and certain other liabilities (interest payable). The Company made significant estimates and exercised significant judgment in estimating fair values and accounting for such acquired assets and liabilities. Such fair values are preliminary estimates and are subject to adjustment for up to one year after the merger date. For tax purposes, acquisition accounting adjustments, including goodwill, are not taxable or deductible. The Company estimated the fair value for most loans acquired from 1 st There was no carryover of 1 st Purchased Credit Impaired (“PCI”) loans are accounted for under ASC 310-30 and non-PCI loans are accounted for under ASC 310-20. PCI loans are acquired loans with evidence of deterioration of credit quality since origination and it is probable at the acquisition date, that the Company will not be able to collect all contractually required amounts. When the timing and/or amounts of expected cash flows on such loans are not reasonably estimable, no interest is accreted and the loan is reported as a non-accrual loan; otherwise, if the timing and amounts of expected cash flows for PCI loans are reasonably estimable, then interest is accreted and the loans are reported as accruing loans. The non-accretable difference represents the difference between the undiscounted contractual cash flows and the undiscounted expected cash flows, and also reflects the estimated credit losses in the acquired loan portfolio at the acquisition date, which can fluctuate due to changes in expected cash flows during the life of the PCI loans. The following table presents the fair value of loans pursuant to accounting standards for PCI and non-PCI loans as of the 1 st November 30, 2014 PCI loans Non-PCI loans Total Contractually required payments $ 577 $ 569,276 $ 569,853 Less: non-accretable difference (108 ) — (108 ) Cash flows expected to be collected (undiscounted) 469 569,276 569,745 Accretable yield — (16,562 ) (16,562 ) Fair value of acquired loans $ 469 $ 552,714 $ 553,183

Computation of Book Value and T

Computation of Book Value and Tangible Book Value per Common Share	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Computation of Book Value and Tangible Book Value per Common Share	Note 4 - Computation of Book Value and Tangible Book Value per Common Share Book value per common share was calculated by dividing total shareholders’ equity less preferred stock, by the number of common shares issued. Tangible book value per common share was calculated by dividing tangible common equity, by the number of common shares issued. The tables below present the computation of book value and tangible book value per common share as of the dates indicated (dollars in thousands, except share and per share data): September 30, 2015 December 31, Total Shareholders’ Equity $ 298,348 $ 279,192 Less: Preferred stock 16,739 16,004 Less: Goodwill 63,950 63,950 Less: Core deposit and leasehold right intangibles 8,138 9,547 Tangible common equity $ 209,521 $ 189,691 Common shares issued 16,870,936 16,683,856 Book value per common share $ 16.69 $ 15.78 Tangible book value per common share $ 12.42 $ 11.37

Computation of Earnings per Com

Computation of Earnings per Common Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Computation of Earnings per Common Share	Note 5 - Computation of Earnings per Common Share Basic and diluted earnings per common share were determined by dividing the net income by the applicable basic and diluted weighted average common shares outstanding. The following table shows weighted average basic shares outstanding, potential dilutive shares related to stock options, unvested restricted stock and restricted stock units, and weighted average diluted shares for the periods indicated (dollars in thousands, except share and per share data): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net Income $ 6,263 $ 2,549 $ 15,729 $ 7,601 Less: Preferred stock dividends and discount accretion 293 — 877 — Net Income available to common shareholders $ 5,970 $ 2,549 $ 14,852 $ 7,601 Weighted average basic common shares outstanding 16,541,380 10,986,065 16,477,206 10,937,507 Dilutive effect of potential common share issuances from stock options, restricted stock and restricted stock units 456,684 203,837 446,296 210,154 Weighted average diluted common shares outstanding 16,998,064 11,189,902 16,923,502 11,147,661 Income per common share Basic $ 0.36 $ 0.23 $ 0.90 $ 0.70 Diluted $ 0.35 $ 0.23 $ 0.88 $ 0.68 Anti-dilutive shares not included in the calculation of diluted earnings per share — 81,000 43,259 82,625

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Note 6 - Investment Securities The investment securities portfolio has been classified into two categories: available-for-sale (“AFS”) and held-to-maturity (“HTM”). The following tables present the amortized cost, gross unrealized gains and losses, and fair values of investment securities by major category as of the dates indicated (dollars in thousands): Gross Unrealized September 30, 2015 Amortized Cost Gains Losses Fair Value Available-for-sale: U.S. Govt Agency and Sponsored Agency - Note Securities $ 1,018 $ 4 $ — $ 1,022 U.S. Govt Agency - SBA Securities 76,238 665 371 76,532 U.S. Govt Agency - GNMA Mortgage-Backed Securities 32,607 243 252 32,598 U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities 97,568 622 285 97,905 Corporate Securities 4,023 29 — 4,052 Municipal Securities 1,017 3 — 1,020 Asset Backed Securities 8,113 — 254 7,859 U.S. Treasury Notes 35,047 50 — 35,097 Total available-for-sale 255,631 1,616 1,162 256,085 Held-to-maturity: Municipal Securities 43,269 224 71 43,422 Total held-to-maturity 43,269 224 71 43,422 Total investment securities $ 298,900 $ 1,840 $ 1,233 $ 299,507 Gross Unrealized December 31, 2014 Amortized Cost Gains Losses Fair Value Available-for-sale: U.S. Govt Agency and Sponsored Agency - Note Securities $ 2,036 $ 2 $ — $ 2,038 U.S. Govt Agency - SBA Securities 54,062 770 345 54,487 U.S. Govt Agency - GNMA Mortgage-Backed Securities 29,364 255 277 29,342 U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities 107,348 457 577 107,228 Corporate Securities 4,043 77 — 4,120 Municipal Securities 1,039 11 — 1,050 Asset Backed Securities 8,711 1 40 8,672 U.S. Treasury Notes 20,031 — 6 20,025 Total available-for-sale 226,634 1,573 1,245 226,962 Held-to-maturity: Municipal Securities 47,147 169 157 47,159 Total held-to-maturity 47,147 169 157 47,159 Total investment securities $ 273,781 $ 1,742 $ 1,402 $ 274,121 The Company’s investment securities portfolio at September 30, 2015, consists of U.S. Treasury Notes, U.S. Agency and U.S. Sponsored Agency issued AAA and AA rated investment-grade securities, asset backed securities, investment grade corporate bond securities, and municipal securities. At September 30, 2015 and December 31, 2014, securities with a market value of $203 million and $148.8 million, respectively, were pledged as collateral for securities sold under agreements to repurchase, public deposits, outstanding standby letters of credit, bankruptcy deposits, and other purposes as required by various statutes and agreements. See Note 9 – Borrowings and Subordinated Debentures. The Company did not have any sales of securities during the three and nine months ended September 30, 2015 and 2014. The following tables present the gross unrealized losses and fair values of AFS and HTM investment securities that were in unrealized loss positions, summarized and classified according to the duration of the loss period as of the dates indicated (dollars in thousands). < 12 Continuous Months > 12 Continuous Months Total September 30, 2015 Fair Value Gross Fair Value Gross Fair Value Gross Temporarily-impaired available-for-sale investment securities: U.S. Govt. Agency SBA Securities $ 27,938 $ 204 $ 11,904 $ 167 $ 39,842 $ 371 U.S. Govt. Agency – GNMA Mortgage-Backed Securities 8,569 69 7,421 183 15,990 252 U.S. Govt. Sponsored Agency – CMO & Mortgage-Backed Securities 38,563 194 4,079 91 42,642 285 Asset Backed Securities 7,859 254 — — 7,859 254 Total temporarily-impaired available-for-sale investment securities $ 82,929 $ 721 $ 23,404 $ 441 $ 106,333 $ 1,162 Temporarily-impaired held-to-maturity investment securities: Municipal Securities $ 10,932 $ 71 $ — $ — $ 10,932 $ 71 Total temporarily-impaired held-to-maturity investment securities $ 10,932 $ 71 $ — $ — $ 10,932 $ 71 < 12 Continuous Months > 12 Continuous Months Total December 31, 2014 Fair Value Gross Fair Value Gross Fair Value Gross Temporarily-impaired available-for-sale investment securities: U.S. Govt. Agency SBA Securities $ 10,688 $ 87 $ 10,095 $ 258 $ 20,783 $ 345 U.S. Govt. Agency – GNMA Mortgage-Backed Securities 12,784 65 8,784 212 21,568 277 U.S. Govt. Sponsored Agency – CMO & Mortgage-Backed Securities 64,360 413 6,584 164 70,944 577 Asset Backed Securities 4,849 40 — — 4,849 40 U.S Treasury Notes 20,025 6 — — 20,025 6 Total temporarily-impaired available-for-sale investment securities $ 112,706 $ 611 $ 25,463 $ 634 $ 138,169 $ 1,245 Temporarily-impaired held-to-maturity investment securities: Municipal Securities $ 23,966 $ 157 $ — $ — $ 23,966 $ 157 Total temporarily-impaired held-to-maturity investment securities $ 23,966 $ 157 $ — $ — $ 23,966 $ 157 The unrealized losses in each of the above categories are associated with the general fluctuation of market interest rates and are not an indication of any deterioration in the credit quality of the security issuers. Further, the Company does not intend to sell these securities and is not more-likely-than-not to be required to sell the securities before the recovery of its amortized cost basis. Accordingly, the Company had no securities that were classified as other-than-temporarily impaired at September 30, 2015 or December 31, 2014, and did not recognize any impairment charges in the consolidated statements of income. The amortized cost, fair value and average yield of debt securities at September 30, 2015, are reflected in the table below (dollars in thousands). Maturity categories are determined as follows: • U.S. Govt. Agency, U.S. Treasury Notes and U.S. Govt. Sponsored Agency bonds and notes – maturity date • U.S. Govt. Sponsored Agency CMO or Mortgage-Backed Securities, U.S. Govt. Agency GNMA Mortgage-Backed Securities, Asset Backed Securities and U.S. Gov. Agency SBA Securities – estimated cash flow taking into account estimated pre-payment speeds • Investment grade Corporate Bonds and Municipal Securities – the earlier of the maturity date or the expected call date Although, U.S. Government Agency and U.S. Government Sponsored Agency Mortgage-Backed and CMO securities have contractual maturities through 2048, the expected maturity will differ from the contractual maturities because borrowers or issuers may have the right to prepay such obligations without penalties. September 30, 2015 Maturities Schedule of Securities (Dollars in thousands) Amortized Fair Value Weighted Available-for-sale: Due through one year $ 51,864 $ 52,087 1.22 % Due after one year through five years 100,939 101,176 1.50 % Due after five years through ten years 64,028 63,949 1.85 % Due after ten years 38,800 38,873 2.45 % Total available-for-sale 255,631 256,085 1.67 % Held-to-maturity: Due through one year 3,743 3,747 2.04 % Due after one year through five years 31,557 31,646 1.52 % Due after five years through ten years 7,969 8,029 1.94 % Total held-to-maturity 43,269 43,422 1.65 % Total investment securities $ 298,900 $ 299,507 1.67 % The weighted average yields in the above table are based on effective rates of book balances at the end of the period. Yields are derived by dividing interest income, adjusted for amortization of premiums and accretion of discounts, by total amortized cost. Investment in FHLB Common Stock The Company’s investment in the common stock of the FHLB of San Francisco is carried at cost and was $8.0 million as of September 30, 2015 and December 31, 2014. The investment in FHLB stock is periodically evaluated for impairment based on, among other things, the capital adequacy of the FHLB and its overall financial condition. Based on the current financial condition of the FHLB and our intent and ability to hold this investment for a period of time sufficient to recover our recorded investment, no impairment losses have been recorded through September 30, 2015. The FHLB also paid a special dividend of $296,000 in the second quarter of 2015. See Note 9 - Borrowings and Subordinated Debentures for a detailed discussion regarding the Company’s borrowings and the requirements to purchase FHLB common stock. See Note 5 - Investment Securities in the Company’s December 31, 2014 10-K for additional discussion on the Company’s evaluation and accounting for its investment in FHLB common stock.

Loans

Loans	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Loans	Note 7 - Loans The following table presents the composition of the Company’s loan portfolio as of the dates indicated (dollars in thousands): September 30, 2015 December 31, Commercial and Industrial Loans: $ 556,462 $ 528,517 Loans Secured by Real Estate: Owner-Occupied Nonresidential Properties 376,579 339,309 Other Nonresidential Properties 515,402 481,517 Construction, Land Development and Other Land 94,353 72,223 1-4 Family Residential Properties 125,635 121,985 Multifamily Residential Properties 65,275 52,813 Total Loans Secured by Real Estate 1,177,244 1,067,847 Other Loans: 37,641 28,359 Total Loans $ 1,771,347 $ 1,624,723 The following table is a breakout of the Company’s loan portfolio stratified by the industry concentration of the borrower by their respective NAICS code as of the dates indicated (dollars in thousands): September 30, December 31, Real Estate $ 811,868 $ 744,663 Manufacturing 167,152 161,233 Wholesale 129,952 124,336 Construction 154,085 113,763 Finance 113,956 96,074 Hotel/Lodging 101,239 88,269 Professional Services 53,147 64,215 Other Services 47,041 45,781 Healthcare 47,359 43,917 Retail 36,777 35,503 Administrative Management 26,164 28,016 Restaurant/Food Service 31,884 24,525 Transportation 21,596 18,158 Information 8,756 15,457 Education 9,192 10,253 Entertainment 5,610 8,284 Other 5,569 2,276 Total $ 1,771,347 $ 1,624,723 SBA Loans As part of the acquisition of PC Bancorp, the Company acquired loans that were originated under the guidelines of the Small Business Administration (“SBA”) program. The total portfolio of the SBA contractual loan balances being serviced by the Company at September 30, 2015 was $109 million, of which $77 million has been sold. Of the $32 million remaining on the Company’s books, $25 million is un-guaranteed and $7 million is guaranteed by the SBA. For SBA guaranteed loans, a secondary market exists to purchase the guaranteed portion of these loans with the Company continuing to “service” the entire loan. The secondary market for guaranteed loans is comprised of investors seeking long term assets with yields that adapt to the prevailing interest rates. These investors are typically financial institutions, insurance companies, pension funds, and other types of investors specializing in the acquisition of this product. When a decision to sell the guaranteed portion of an SBA loan is made by the Company, bids are solicited from secondary market investors and the loan is normally sold to the highest bidder. At September 30, 2015, there were no loans classified as held for sale. At September 30, 2015, the balance of SBA 7a loans originated during the quarter is $2 million, of which $1 million is guaranteed by the SBA. The Company does not currently plan on selling these loans, but it may choose to do so in the future. Allowance for Loan Loss The following table is a summary of the activity for the allowance for loan loss for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Allowance for loan loss at beginning of period $ 14,124 $ 11,284 $ 12,610 $ 10,603 Provision for loan losses 705 35 2,831 518 Net (charge-offs) recoveries: Charge-offs (42 ) (8 ) (933 ) (165 ) Recoveries 178 37 457 392 Net (charge-offs) recoveries 136 29 (476 ) 227 Allowance for loan loss at end of period $ 14,965 $ 11,348 $ 14,965 $ 11,348 Net (charge-offs) recoveries to average loans 0.01 % 0.00 % (0.03 )% (0.02 )% September 30, 2015 December 31, 2014 Allowance for loan loss to total loans 0.84 % 0.78 % Allowance for loan loss to total loans accounted for at historical cost, which excludes loans and the related allowance for loans acquired through acquisition 1.30 % 1.39 % The allowance for losses on unfunded loan commitments to extend credit is primarily related to commercial lines of credit and construction loans. The amount of unfunded loan commitments at September 30, 2015 and December 31, 2014 was $765 million and $720 million, respectively. The inherent risk associated with a loan is evaluated at the same time the credit is extended. However, the allowance held for the commitments is reported in other liabilities within the accompanying consolidated balance sheets and not as part of the allowance for loan loss in the above table. The allowance for losses on unfunded loan commitments to extend credit was $561,000 and $471,000 at September 30, 2015 and December 31, 2014, respectively. The following tables present, by portfolio segment, the changes in the allowance for loan loss and the recorded investment in loans as of the dates and for the periods indicated (dollars in thousands): Commercial and Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total Three Months Ended September 30, 2015 Allowance for loan loss – Beginning balance $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Provision for loan losses 181 371 143 10 705 Net (charge-offs) recoveries: Charge-offs — — (42 ) — (42 ) Recoveries 177 — 1 — 178 Net (charge offs) recoveries 177 — (41 ) — 136 Ending balance $ 6,602 $ 1,978 $ 5,901 $ 484 $ 14,965 Three Months Ended September 30, 2014 Allowance for loan loss – Beginning balance $ 5,385 $ 1,422 $ 4,426 $ 51 $ 11,284 Provision for loan losses 333 (205 ) (429 ) 336 35 Net (charge-offs) recoveries: Charge-offs — — (8 ) — (8 ) Recoveries 36 — 1 — 37 Net (charge-offs) recoveries 36 — (7 ) — 29 Ending balance $ 5,754 $ 1,217 $ 3,990 $ 387 $ 11,348 Commercial and Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total Nine Months Ended September 30, 2015 Allowance for loan loss – Beginning balance $ 5,864 $ 1,684 $ 4,802 $ 260 $ 12,610 Provision for loan losses 1,176 294 1,137 224 2,831 Net (charge-offs) recoveries: Charge-offs (891 ) — (42 ) — (933 ) Recoveries 453 — 4 — 457 Net (charge-offs) recoveries (438 ) — (38 ) — (476 ) Ending balance $ 6,602 $ 1,978 $ 5,901 $ 484 $ 14,965 Nine Months Ended September 30, 2014 Allowance for loan loss – Beginning balance $ 5,534 $ 1,120 $ 3,886 $ 63 $ 10,603 Provision for loan losses 25 97 72 324 518 Net (charge-offs) recoveries: Charge-offs (93 ) — (72 ) — (165 ) Recoveries 288 — 104 — 392 Net (charge-offs) recoveries 195 — 32 — 227 Ending balance $ 5,754 $ 1,217 $ 3,990 $ 387 $ 11,348 The following tables present both the allowance for loan loss and the associated loan balance classified by loan portfolio segment and by credit evaluation methodology (dollars in thousands): Commercial Industrial Construction, Other Land Commercial Other Real Estate Other Total September 30, 2015 Allowance for loan loss: Individually evaluated for impairment $ 577 $ — $ — $ — $ 577 Collectively evaluated for impairment 6,025 1,978 5,901 484 14,388 Purchased credit impaired (loans acquired with deteriorated credit quality) — — — — — Total Allowance for Loan Loss $ 6,602 $ 1,978 $ 5,901 $ 484 $ 14,965 Loans receivable: Individually evaluated for impairment $ 3,446 $ — $ 99 $ — $ 3,545 Collectively evaluated for impairment 552,634 94,353 1,081,258 37,641 1,765,886 Purchased credit impaired (loans acquired with deteriorated credit quality) 382 — 1,534 — 1,916 Total Loans Receivable $ 556,462 $ 94,353 $ 1,082,891 $ 37,641 $ 1,771,347 Commercial Industrial Construction, Other Land Commercial Other Real Estate Other Total December 31, 2014 Allowance for loan loss: Individually evaluated for impairment $ 222 $ — $ — $ — $ 222 Collectively evaluated for impairment 5,642 1,684 4,802 260 12,388 Purchased credit impaired (loans acquired with deteriorated credit quality) — — — — — Total Allowance for Loan Loss $ 5,864 $ 1,684 $ 4,802 $ 260 $ 12,610 Loans receivable: Individually evaluated for impairment $ 1,914 $ — $ 737 $ — $ 2,651 Collectively evaluated for impairment 525,910 72,223 993,195 28,359 1,619,687 Purchased credit impaired (loans acquired with deteriorated credit quality) 693 — 1,692 — 2,385 Total Loans Receivable $ 528,517 $ 72,223 $ 995,624 $ 28,359 $ 1,624,723 Credit Quality of Loans The Company utilizes an internal loan classification system as a means of reporting problem and potential problem loans. Under the Company’s loan risk rating system, loans are classified as “Pass,” with problem and potential problem loans as “Special Mention,” “Substandard,” “Doubtful” and “Loss”. Individual loan risk ratings are updated continuously or at any time the situation warrants. In addition, management regularly reviews problem loans to determine whether any loan requires a classification change, in accordance with the Company’s policy and applicable regulations. The grading analysis estimates the capability of the borrower to repay the contractual obligations of the loan agreements as scheduled or at all. The internal loan classification risk grading system is based on experiences with similarly graded loans. The Company’s internally assigned grades are as follows: • Pass – loans which are protected by the current net worth and paying capacity of the obligor or by the value of the underlying collateral. There are several different levels of Pass rated credits, including “Watch” which is considered a transitory grade for pass rated loans that require greater monitoring. Loans not meeting the criteria of special mention, substandard, doubtful or loss that have been analyzed individually as part of the above described process are considered to be pass-rated loans. • Special Mention – loans where a potential weakness or risk exists, which could cause a more serious problem if not corrected. Special Mention loans do not currently expose the Company to sufficient risk to warrant classification as a Substandard, Doubtful or Loss classification, but possess weaknesses that deserve management’s close attention. • Substandard – loans that have a well-defined weakness based on objective evidence and can be characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. • Doubtful – loans classified as doubtful have all the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. • Loss – loans classified as a loss are considered uncollectible, or of such value that continuance as an asset is not warranted. The following tables present the risk category of loans by class of loans based on the most recent internal loan classification as of the dates indicated (dollars in thousands): Commercial Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total September 30, 2015 Pass $ 527,311 $ 94,353 $ 1,054,807 $ 37,640 $ 1,714,111 Special Mention 11,862 — 8,103 — 19,965 Substandard 17,289 — 19,981 1 37,271 Doubtful — — — — — Total $ 556,462 $ 94,353 $ 1,082,891 $ 37,641 $ 1,771,347 December 31, 2014 Pass $ 502,624 $ 72,223 $ 977,525 $ 28,358 $ 1,580,730 Special Mention 8,738 — 4,878 — 13,616 Substandard 17,155 — 13,221 1 30,377 Doubtful — — — — — Total $ 528,517 $ 72,223 $ 995,624 $ 28,359 $ 1,624,723 Age Analysis of Past Due and Non-Accrual Loans The following tables present an aging analysis of the recorded investment of past due loans and non-accrual loans as of the dates indicated (dollars in thousands): 31-60 Days Past Due 61-90 Days Past Due Greater 90 Days Past Due and Total Past Due and Total Non- Accrual Current Total Loans September 30, 2015 Commercial and Industrial $ 85 $ 11 $ — $ 96 $ 3,826 $ 552,540 $ 556,462 Construction, Land Development and Other Land — — — — — 94,353 94,353 Commercial and Other Real Estate — 391 — 391 478 1,082,022 1,082,891 Other — — — — — 37,641 37,641 Total $ 85 $ 402 $ — $ 487 $ 4,304 $ 1,766,556 $ 1,771,347 31-60 Days Past Due 61-90 Days Past Due Greater 90 Days Past Due and Total Past Due and Total Non- Accrual Current Total Loans December 31, 2014 Commercial and Industrial $ 192 $ 233 $ — $ 425 $ 2,604 $ 525,488 $ 528,517 Construction, Land Development and Other Land — — — — — 72,223 72,223 Commercial and Other Real Estate 354 — — 354 1,305 993,965 995,624 Other — — — — — 28,359 28,359 Total $ 546 $ 233 $ — $ 779 $ 3,909 $ 1,620,035 $ 1,624,723 Impaired Loans Impaired loans are evaluated by comparing the fair value of the collateral, if the loan is collateral dependent, and the present value of the expected future cash flows discounted at the loan’s effective interest rate, if the loan is not collateral dependent. A valuation allowance is established for an impaired loan when the realizable value of the loan is less than the recorded investment. In certain cases, portions of impaired loans are charged-off to realizable value instead of establishing a valuation allowance and are included, when applicable, in the table below as impaired loans “with no specific allowance recorded.” The valuation allowance disclosed below is included in the allowance for loan loss reported in the consolidated balance sheets as of September 30, 2015 and December 31, 2014. The following tables present, by loan category, the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount, if applicable, for the dates and periods indicated (dollars in thousands). This table excludes purchased credit impaired loans (loans acquired in acquisitions with deteriorated credit quality) of $3 million and $2 million at September 30, 2015 and December 31, 2014, respectively. September 30, 2015 December 31, 2014 Recorded Unpaid Related Recorded Unpaid Related With no specific allowance recorded: Commercial and Industrial $ 2,118 $ 3,629 $ — $ 520 $ 609 $ — Commercial and Other Real Estate 99 105 — 737 739 — — With a specific allowance recorded: Commercial and Industrial 1,328 1,479 577 1,394 1,546 222 Total Commercial and Industrial 3,446 5,108 577 1,914 2,155 222 Commercial and Other Real Estate 99 105 — 737 739 — Total $ 3,545 $ 5,213 $ 577 $ 2,651 $ 2,894 $ 222 Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Average Interest Average Interest Average Interest Average Interest With no specific allowance recorded: Commercial and Industrial $ 2,118 $ — $ 1,051 $ — $ 1,757 $ — $ 1,035 $ 34 Commercial and Other Real Estate 99 — 2,960 — 104 — 3,207 — With a specific allowance recorded: Commercial and Industrial 1,328 — 1,494 — 1,328 — 1,533 — Commercial and Other Real Estate 413 — — 550 — — Total: Commercial and Industrial 3,446 — 2,545 — 3,085 — 2,568 34 Commercial and Other Real Estate 512 — 2,960 — 654 — 3,207 — Total $ 3,958 $ — $ 5,505 $ — $ 3,739 $ — $ 5,775 $ 34 The following is a summary of additional information pertaining to impaired loans for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Interest foregone on impaired loans $ 81 $ 72 $ 238 $ 346 Cash collections applied to reduce principal balance $ 23 $ 18 $ 186 $ 2,889 Interest income recognized on cash collections $ — $ — $ — $ 34 Troubled Debt Restructuring The Company’s loan portfolio contains certain loans that have been modified in a Troubled Debt Restructuring (“TDR”), where economic concessions have been granted to borrowers experiencing financial difficulties. Loans are restructured in an effort to maximize collections. Economic concessions can include: reductions to the interest rate, payment extensions, forgiveness of principal or other actions. The modification process includes evaluation of impairment based on the present value of expected future cash flows, discounted at the effective interest rate of the original loan agreement, except when the sole (remaining) source of repayment for the loan is the operation or liquidation of the loan collateral. In these cases, management uses the current fair value of the collateral, less selling costs, to evaluate the loan for impairment. If management determines that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs and unamortized premium or discount), impairment is recognized through a specific allowance or a charge-off. The following tables include the recorded investment and unpaid principal balances for troubled debt restructured loans at September 30, 2015 and December 31, 2014 (dollars in thousands). These tables include TDR loans that were purchased credit impaired (“PCI”). As of September 30, 2015, there were two PCI loans that are considered to be TDR loans with a recorded investment of $161,000 and unpaid principal balances of $344,000. Recorded Unpaid Interest Income Recognized As of and for the period ended September 30, 2015 Commercial and Industrial $ 1,780 $ 2,385 $ — Commercial and Other Real Estate 99 105 — Total $ 1,879 $ 2,490 $ — Recorded Unpaid Interest Income Recognized As of and for the year ended December 31, 2014 Commercial and Industrial $ 530 $ 719 $ — Commercial and Other Real Estate 114 115 — Total $ 644 $ 834 $ — The following table shows the pre- and post-modification recorded investment in TDR loans by loan segment that have occurred during the periods indicated (dollars in thousands): Three Months Ended September 30, 2015 2014 Number Loans Pre- Modification Post- Number Loans Pre-Modification Post- Troubled Debt Restructured Loans: Commercial and Industrial 3 $ 1,335 $ 1,335 — $ — $ — Total 3 $ 1,335 $ 1,335 — $ — $ — Nine Months Ended September 30, 2015 2014 Number Loans Pre-Modification Post- Number Loans Pre-Modification Post- Troubled Debt Restructured Loans: Commercial and Industrial 3 $ 1,335 $ 1,335 1 $ 224 $ 224 Total 3 $ 1,335 $ 1,335 1 $ 224 $ 224 There was no interest income recognized for the above troubled debt restructured loans during the three months and nine months ended September 30, 2015 or September 30, 2014. Three loans were modified or restructured during the three and nine months ended September 30, 2015. There were no loans restructured during the three months ended September 30, 2014. One loan was modified or restructured during the nine months ended September 30, 2014. Loans are restructured in an effort to maximize collections. Impairment analyses are performed on the Company’s troubled debt restructured loans in conjunction with the normal allowance for loan loss process. The Company’s troubled debt restructured loans are analyzed to ensure adequate cash flow or collateral supports the outstanding loan balance. There have been no payment defaults in nine months ended September 30, 2015 or September 30, 2014 subsequent to modification on troubled debt restructured loans that have been modified within the last twelve months. Loans Acquired Through Acquisition The following table reflects the accretable net discount for loans acquired through acquisition, for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Balance, beginning of period $ 18,255 $ 6,412 $ 21,402 $ 7,912 Accretion, included in interest income (1,463 ) (813 ) (4,140 ) (2,264 ) Reclassifications (to) from non-accretable yield (5 ) — (475 ) (49 ) Balance, end of period $ 16,787 $ 5,599 $ 16,787 $ 5,599 The above table reflects the fair value adjustment on the loans acquired from mergers that will be amortized to loan interest income based on the effective yield method over the remaining life of the loans. These amounts do not include the fair value adjustments on the purchased credit impaired loans acquired from mergers. Purchased Credit Impaired Loans PCI loans are acquired loans with evidence of deterioration of credit quality since origination and it is probable at the acquisition date, that the Company will not be able to collect all contractually required amounts. When the timing and/or amounts of expected cash flows on such loans are not reasonably estimable, no interest is accreted and the loan is reported as a non-accrual loan; otherwise, if the timing and amounts of expected cash flows for PCI loans are reasonably estimable, then interest is accreted and the loans are reported as accruing loans. The non-accretable difference represents the difference between the undiscounted contractual cash flows and the undiscounted expected cash flows, and also reflects the estimated credit losses in the acquired loan portfolio at the acquisition date and can fluctuate due to changes in expected cash flows during the life of the PCI loans. The following table reflects the outstanding balance and related carrying value of PCI loans as of the dates indicated (dollars in thousands): September 30, 2015 December 31, 2014 Unpaid Carrying Value Unpaid Carrying Value Commercial and Industrial $ 710 $ 382 $ 1,205 $ 693 Commercial and Other Real Estate 2,262 1,534 3,018 1,692 Other — — 62 — Total $ 2,972 $ 1,916 $ 4,285 $ 2,385 The following table reflects the activities in the accretable net discount for PCI loans for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Balance, beginning of period $ 286 $ 360 $ 324 $ 395 Accretion, included in interest income (20 ) (18 ) (58 ) (53 ) Reclassifications from non-accretable yield — — — — Balance, end of period $ 266 $ 342 $ 266 $ 342

Qualified Affordable Housing Pr

Qualified Affordable Housing Project Investments	9 Months Ended
	Sep. 30, 2015
Federal Home Loan Banks [Abstract]
Qualified Affordable Housing Project Investments	Note 8 - Qualified Affordable Housing Project Investments The Company’s investment in Qualified Affordable Housing Projects that generate Low Income Housing Tax Credits (“LIHTC”) was $3.8 million at September 30, 2015 and $4.2 million at December 31, 2014. The funding liability for the LIHTC was $1 million at September 30, 2015 compared to $3 million at December 31, 2014. The amount of tax credits and other tax benefits recognized was $436,000 and $443,000 for the nine months ended September 30, 2015 and September 30, 2014, respectively. Further, the amount of amortization expense included in the provision for income taxes was $343,000 and $348,000 for the nine months ended September 30, 2015 and September 30, 2014, respectively. See Note 11 – Qualified Affordable Housing Project Investments in the Company’s 10-K financial statements at December 31, 2014 for additional detail regarding the Company’s investment in LIHTC.

Borrowings and Subordinated Deb

Borrowings and Subordinated Debentures	9 Months Ended
	Sep. 30, 2015
Brokers and Dealers [Abstract]
Borrowings and Subordinated Debentures	Note 9 - Borrowings and Subordinated Debentures Securities Sold Under Agreements to Repurchase The Company enters into certain transactions, the legal form of which are sales of securities under agreements to repurchase (“Repos”) at a later date at a set price. Securities sold under agreements to repurchase generally mature within 1 day to 180 days from the issue date and are routinely renewed. As discussed in Note 6 – Investment Securities, the Company has pledged certain investments as collateral for these agreements. Securities with a fair value of $49 million and $32.3 million were pledged to secure the Repos at September 30, 2015 and December 31, 2014, respectively. The tables below describe the terms and maturity of the Company’s securities sold under agreements to repurchase as of the dates indicated (dollars in thousands): September 30, 2015 Date Issued Amount Interest Rate Original Maturity Date September 30, 2015 $ 16,698 0.10% – 0.25 % 1 day October 1, 2015 Total $ 16,698 0.22 % December 31, 2014 Date Issued Amount Interest Rate Original Maturity Date December 31, 2014 $ 9,411 0.13% – 0.25 % 2 days January 2, 2015 Total $ 9,411 0.20 % Federal Home Loan Bank Borrowings The Company maintains a secured credit facility with the Federal Home Loan Bank of San Francisco “FHLB”, allowing the Company to borrow on an overnight and term basis. The Company’s credit facility with the FHLB is $618 million, which represents approximately 25% of the Bank’s total assets, as reported by the Bank in its June 30, 2015 FFIEC Call Report. As of September 30, 2015, the Company had $795 million of loan collateral pledged with the FHLB which provides $526 million in borrowing capacity. The Company has $20 million in investment securities pledged with the FHLB to support this credit facility. In addition, the Company must maintain an investment in the Capital Stock of the FHLB. Under the FHLB Act, the FHLB has a statutory lien on the FHLB capital stock that the Company owns and the FHLB capital stock serves as further collateral under the borrowing line. The Company had no outstanding advances (borrowings) with the FHLB as of September 30, 2015 or December 31, 2014. Subordinated Debentures The following table summarizes the terms of each issuance of subordinated debentures outstanding as of September 30, 2015: Series Amount (in thousands) Issuance Maturity Rate Index Current Next Trust I $ 6,186 12/10/04 03/15/35 3 month LIBOR + 2.05 % 2.39 % 12/15/15 Trust II 3,093 12/23/05 03/15/36 3 month LIBOR + 1.75 % 2.09 % 12/15/15 Trust III 3,093 06/30/06 09/18/36 3 month LIBOR + 1.85 % 2.19 % 12/15/15 Subtotal 12,372 Unamortized fair value adjustment (2,715 ) Net $ 9,657 The Company had an aggregate outstanding contractual balance of $12.4 million in subordinated debentures at September 30, 2015. These subordinated debentures were acquired as part of the PC Bancorp merger and were issued to trusts originally established by PC Bancorp, which in turn issued trust preferred securities. These subordinated debentures were issued in three separate series. Each issuance had a maturity of 30 years from their approximate date of issue. All three subordinated debentures are variable rate instruments that reprice quarterly based on the three month LIBOR plus a margin (see tables above). All three subordinated debentures had their interest rates reset in September 2015 at the current three month LIBOR plus their index, and will continue to reprice quarterly through their maturity date. All three subordinated debentures are currently callable at par with no prepayment penalties. Under Dodd Frank, trust preferred securities are excluded from Tier 1 capital, unless such securities were issued prior to May 19, 2010 by a bank holding company with less than $15 billion in assets. CU Bancorp assumed approximately $12.4 million of junior subordinated debt securities issued to various business trust subsidiaries of Premier Commercial Bancorp and funded through the issuance of approximately $12.0 million of floating rate capital trust preferred securities. These junior subordinated debt securities were issued prior to May 19, 2010. Because CU Bancorp has less than $15 billion in assets, the trust preferred securities that CU Bancorp assumed from Premier Commercial Bancorp continue to be included in Tier 1 capital, subject to a limit of 25% of Tier 1 capital elements. Interest payments made by the Company on subordinated debentures are considered dividend payments under FRB regulations. Notification to the FRB is required prior to the Company declaring and paying a dividend during any period in which the Company’s quarterly net earnings are insufficient to fund the dividend amount. This notification requirement is included in regulatory guidance regarding safety and soundness surrounding capital and includes other non-financial measures such as asset quality, financial condition, capital adequacy, liquidity, future earnings projections, capital planning and credit concentrations. Should the FRB object to the dividend payments, the Company would be precluded from paying interest on the subordinated debentures after giving notice within 15 days before the payment date. Payments would not commence until approval is received or the Company no longer needs to provide notice under applicable guidance. The Company has the right, assuming no default has occurred, to defer payments of interest on the subordinated debentures at any time for a period not to exceed 20 consecutive quarters. The Company has not deferred any interest payments.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 10 - Derivative Financial Instruments The Company is exposed to certain risks relating to its ongoing business operations and utilizes interest rate swap agreements (“swaps”) as part of its asset/liability management strategy to help manage its interest rate risk position. The Company has two counterparty banks. Derivative Financial Instruments Acquired from 1st Enterprise At September 30, 2015, the Company has thirteen interest rate swap agreements with customers and thirteen offsetting interest-rate swaps with a counterparty bank that were acquired as a result of the merger with 1 st The structure of the swaps is as follows: The Company enters into a swap with its customers to allow them to convert variable rate loans to fixed rate loans, and at the same time, the Company enters into a swap with the counterparty bank to allow the Company to pass on the interest-rate risk associated with fixed rate loans. The net effect of the transaction allows the Company to receive interest on the loan from the customer at a variable rate based on LIBOR plus a spread. The changes in the fair value of the swaps primarily offset each other and therefore should not have a significant impact on the Company’s results of operations. Our interest rate swap derivatives acquired from 1 st The Company believes the risk of loss associated with counterparty borrowers relating to interest rate swaps is mitigated as the loans with swaps are underwritten to take into account potential additional exposure, although there can be no assurances in this regard since the performance of the swaps is subject to market and counterparty risk. At September 30, 2015 and December 31, 2014, the total notional amount of the Company’s swaps acquired from 1 st The following tables present the notional amount and the fair values of the asset and liability of the Company’s derivative instruments acquired from 1 st Asset Derivatives September 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 1,298 $ 719 Balance sheet location Accrued Interest Receivable and Other Assets Accrued Interest Receivable and Other Assets The following table presents the fair values of the liability of the Company’s derivative instruments acquired from 1 st Liability Derivatives September 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 1,298 $ 719 Balance sheet location Accrued Interest Accrued Interest Derivative Financial Instruments Acquired from PC Bancorp At September 30, 2015, the Company also has nineteen pay-fixed, receive-variable, interest rate contracts that are designed to convert fixed rate loans into variable rate loans. The Company acquired these interest rate swap contracts on July 31, 2012 as a result of the merger with PC Bancorp. All of the interest rate swap contracts acquired from PC Bancorp are with the same counterparty bank. The outstanding swaps have original maturities of up to 15 years. The following table presents the notional amount and the fair values of the asset and liability of the Company’s derivative instruments acquired from PC Bancorp as of the dates indicated (dollars in thousands): Liability Derivatives September 30, 2015 December 31, 2014 Fair Value Hedges Total interest rate contacts notional amount $ 26,226 $ 29,289 Derivatives not designated as hedging instruments: Interest rate swap contracts fair value $ 394 $ 519 Derivatives designated as hedging instruments: Interest rate swap contracts fair value 1,694 2,277 Total interest rate contracts fair value $ 2,088 $ 2,796 Balance sheet location Accrued Interest Payable and Other Liabilities Accrued Interest Payable and Other Liabilities The Effect of Derivative Instruments on the Consolidated Statements of Income The following table summarizes the effect of all derivative financial instruments on the consolidated statements of income for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Derivatives not designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 41 $ 86 $ 124 $ 179 Payments on interest rate swap contracts on loans (66 ) (69 ) (198 ) (205 ) Net increase (decrease) in other non-interest income $ (25 ) $ 17 $ (74 ) $ (26 ) Derivatives designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 142 $ 361 $ 583 $ 663 Increase (decrease) in fair value of hedged loans 191 (104 ) 279 135 Payment on interest rate swap contracts on loans (275 ) (317 ) (846 ) (950 ) Net increase (decrease) in interest income on loans $ 58 $ (60 ) $ 16 $ (152 ) Under all of the Company’s interest rate swap contracts, the Company is required to pledge and maintain collateral for the credit support under these agreements. At September 30, 2015, the Company has pledged $2 million in investment securities and $3 million in certificates of deposit, for a total of $5 million, as collateral under the swap agreements.

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Balance Sheet Offsetting	Note 11 – Balance Sheet Offsetting Assets and liabilities relating to certain financial instruments, including derivatives, and securities sold under repurchase agreements (“Repos”), may be eligible for offset in the consolidated balance sheets as permitted under accounting guidance. The Company’s interest rate swap derivatives are subject to a master bilateral netting and offsetting arrangement under specific conditions as defined within a master agreement governing all interest rate swap contracts that the Company and the counterparty banks have entered into. In addition, the master agreement under which the interest rate contracts have been written require the pledging of assets by the Company based on certain risk thresholds. The Company has pledged a certificate of deposit and investment securities as collateral under the swap agreements. The pledged collateral under the swap agreements are reported in the Company’s consolidated balance sheets, unless the Company defaults under the master agreement. The Company currently does not net or offset the interest rate swap contracts in its consolidated balance sheets, as reflected within the table below. The Company’s securities sold under repurchase agreements represent transactions the Company has entered into with several deposit customers. These transactions represent the sale of securities on an overnight or on a term basis to our deposit customers under an agreement to repurchase the securities from the customers the next business day or at maturity. There is an individual contract for each customer with only one transaction per customer. There is no master agreement that provides for the netting arrangement or the offsetting of these individual transactions or for the netting of collateral positions. The Company does not net or offset the Repos in its consolidated balance sheets as reflected within the table below. The table below presents the Company’s financial instruments that may be eligible for offsetting which include securities sold under agreements to repurchase that have no enforceable master netting arrangement and derivative securities that could be offset in the consolidated financial statements due to an enforceable master netting arrangement (dollars in thousands): Gross Gross Net Amounts of Assets in the Gross Amounts Not Offset in the Consolidated Balance Sheets Net Amount Financial Collateral September 30, 2015 Financial Assets: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 1,298 $ — $ 1,298 $ 1,298 $ — $ — Total $ 1,298 $ — $ 1,298 $ 1,298 $ — $ — Financial Liabilities: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 3,386 $ — $ 3,386 $ 3,386 $ 4,306 $ 920 Securities sold under agreements to repurchase (See Note 9 – Borrowings and Subordinated Debentures) 16,698 — 16,698 16,698 49,139 32,441 Total $ 20,084 $ — $ 20,084 $ 20,084 $ 53,445 $ 33,361 Gross Gross Net in the Gross Amounts Not Offset in the Consolidated Balance Sheets Net Amount Financial Collateral December 31, 2014 Financial Assets: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 719 $ — $ 719 $ 719 $ — $ — Total $ 719 $ — $ 719 $ 719 $ — $ — Financial Liabilities: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 3,515 $ — $ 3,515 $ 3,515 $ 4,150 $ 635 Securities sold under agreements to repurchase (See Note 9 – Borrowings and Subordinated Debentures) 9,411 — 9,411 9,411 32,304 22,893 Total $ 12,926 $ — $ 12,926 $ 12,926 $ 36,454 $ 23,528

Stock Options and Restricted St

Stock Options and Restricted Stock	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options and Restricted Stock	Note 12 - Stock Options and Restricted Stock Equity Compensation Plans The Company’s 2007 Equity and Incentive Plan, “Equity Plan,” was adopted by the Company in 2007 and replaced two prior equity compensation plans. The Equity Plan provides for significant flexibility in determining the types and terms of awards that may be made to participants. The Equity Plan was revised and approved by the Company’s shareholders in 2011 and adopted by the Company as part of the Bank holding company reorganization. This plan is designed to promote the interest of the Company in aiding the Company to attract and retain employees, officers and non-employee directors who are expected to contribute to the future success of the organization. The Equity Plan is intended to provide participants with incentives to maximize their efforts on behalf of the Company through stock-based awards that provide an opportunity for stock ownership. This plan provides the Company with a flexible equity incentive compensation program, which allows the Company to grant stock options, restricted stock, restricted stock award units and performance units. Certain options and share awards provide for accelerated vesting, if there is a change in control, as defined in the Equity Plan. These plans are described more fully in Note 16 - Stock Options and Restricted Stock in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. At September 30, 2015, future compensation expense related to unvested restricted stock grants are reflected in the table below (dollars in thousands): Restricted Stock Expense Remainder of 2015 $ 676 2016 1,879 2017 760 2018 273 2019 31 Thereafter — Total $ 3,619 There was no future compensation expense related to stock options as of September 30, 2015. All stock options outstanding at September 30, 2015 are vested. Stock Options There were no stock options granted by the Company in 2012, 2013, 2014, or during the nine months ended September 30, 2015. The following table summarizes the share option activity under the plans as of the date and for the period indicated: Shares Weighted Weighted Aggregate Outstanding stock options at December 31, 2014 1,016,490 $ 10.13 1.6 $ 11,770 Granted — Exercised (158,315 ) Forfeited (5,000 ) Expired — Outstanding stock options at September 30, 2015 853,175 $ 10.26 0.9 $ 10,467 Exercisable options at September 30, 2015 853,175 $ 10.26 0.9 $ 10,467 Unvested options at September 30, 2015 — The Company recorded stock option compensation expense of $0 and $2,000 for the three months ended September 30, 2015 and 2014, and $1,700 and $8,000 for the nine months period September 30, 2015 and 2014, respectively. The total intrinsic value of options exercised during the three months ended September 30, 2015 and 2014 was $2 million and $1 million, respectively. Restricted Stock The weighted-average grant-date fair value per share in the table below is calculated by taking the total aggregate cost of the restricted shares issued divided by the number of shares of restricted stock issued. The aggregate cost of the restricted stock was calculated by multiplying the number of shares granted at each of the grant dates by the closing stock price of the Company’s common stock on the date of the grant. The following table summarizes the restricted stock activity under the Equity Plan for the period indicated: Number of Shares Weighted-Average Grant-Date Fair Value Restricted Stock: Unvested at December 31, 2014 309,506 $ 16.41 Granted 77,800 20.95 Vested (99,750 ) 13.42 Cancelled and forfeited (9,175 ) 16.50 Unvested at September 30, 2015 278,381 $ 18.74 Restricted stock compensation expense related to the restricted stock grants reflected in the table above was $745,000 and $443,000 for the three month period ended September 30, 2015 and 2014 and $2 million and $1 million for the nine month period ended September 30, 2015 and 2014, respectively. Restricted stock awards reflected in the table above are valued at the closing stock price on the date of grant and are expensed to stock based compensation expense over the period for which the related service is performed. During the three months and nine months ended September 30, 2015, the Company granted 40,000 shares of Restricted Stock Unit (“RSU”), respectively, under the Equity Plan to one of its executive officers. Such grant is not reflected in the table above. The shares of common stock underlying the 40,000 shares of RSU will not be issued until the RSUs vest but are outstanding as of September 30, 2015. The RSUs are valued at the closing stock price on the date of grant and are expensed to stock based compensation expense over the period for which the related service is performed.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Shareholders' Equity	Note 13 – Shareholders’ Equity Common Stock During the first three quarters of 2015, the Company’s issued common stock increased by 187,080 shares, from 16,683,856 shares at December 31, 2014, to 16,870,936 shares at September 30, 2015. During the nine months ended September 30, 2015, the Company issued 158,315 shares of stock from the exercise of employee stock options for a total value of $1,434,000. The Company also granted 77,800 shares of restricted stock awards to the Company’s directors and employees and cancelled 9,175 shares of unvested restricted stock related to employee turnover, resulting in a net issuance of restricted stock of 68,625 shares. Further, the Company cancelled 39,860 shares of restricted stock that had a value of $856,000 when employees elected to pay their tax obligation via the repurchase of the stock by the Company. The Equity Plan, as amended, allows employees to make an election to have a portion of their restricted stock that became vested during the year repurchased by the Company to provide funds to pay the employee’s tax obligation related to the vesting of the stock. Preferred Stock As discussed in Note 3 - Business Combinations, the Company completed the merger with 1 st st The Company currently includes the Non-Cumulative Perpetual Preferred Stock, Series A, in its Tier 1 capital. Under Basel III, the CU Bancorp Preferred Stock continues to be included in Tier 1 capital because non-cumulative perpetual preferred stock remained classified as Tier 1 capital following the enactment of Dodd Frank. Other Comprehensive Income (Loss) The following table presents the changes in accumulated other comprehensive income (loss) by component for the periods indicated (dollars in thousands): Before Tax Tax Effect Net of Tax Three Months Ended – September 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ (82 ) $ (34 ) $ (48 ) Net unrealized gains arising during the period 536 225 311 Ending balance $ 454 $ 191 $ 263 Before Tax Tax Effect Net of Tax Three Months Ended – September 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ 331 $ 136 $ 195 Net unrealized gains arising during the period 19 11 8 Ending balance $ 350 $ 147 $ 203 Before Tax Tax Effect Net of Tax Nine Months Ended – September 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ 333 $ 143 $ 190 Net unrealized gains arising during the period 121 48 73 Ending balance $ 454 $ 191 $ 263 Before Tax Tax Effect Net of Tax Nine Months Ended – September 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ (348 ) $ (143 ) $ (205 ) Net unrealized gains arising during the period 698 290 408 Ending balance $ 350 $ 147 $ 203

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 14 - Commitments and Contingencies Litigation From time to time the Company is a party to claims and legal proceedings arising in the ordinary course of business. The Company accrues for any probable loss contingencies that are estimable and discloses any material losses. As of September 30, 2015, there were no legal proceedings against the Company the outcome of which are expected to have a material adverse impact on the Company’s financial position, results of operations or cash flows, as a whole. Financial Instruments with Off Balance Sheet Risk See Note 21 – Commitments and Contingencies in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Financial instruments with off balance sheet risk include commitments to extend credit of $765 million and $720 million at September 30, 2015 and December 31, 2014, respectively. Included in the aforementioned commitments were standby letters of credit outstanding of $70 million and $57 million at September 30, 2015 and December 31, 2014, respectively.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Note 15 - Fair Value of Assets and Liabilities Fair Value Measurement Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for an asset or liability in an orderly transaction between market participants at the measurement date. ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including both those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis and a non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value, and for estimating the fair value of financial assets and financial liabilities not recorded at fair value, are discussed below. In accordance with accounting guidance, the Company groups its financial assets and financial liabilities measured 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 as follows: • Level 1 – Observable unadjusted quoted market prices in active markets for identical assets and liabilities that the reporting entity has the ability to access at the measurement date. • Level 2 – Significant other observable market based inputs, other than Level 1 prices such as quoted prices for similar assets or liabilities or unobservable inputs that are corroborated by market data. This includes quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data, either directly or indirectly. This would include those financial instruments that are valued using models or other valuation methodologies where substantially all of the assumptions are observable in the marketplace, can be derived from observable market data or are supported by observable levels at which transactions are executed in the marketplace. • Level 3 – Significant unobservable inputs that reflect a reporting entity’s evaluation about the assumptions that market participants would use in pricing an asset or liability. Assets measured utilizing level 3 are for positions that are not traded in active markets or are subject to transfer restrictions, and or where valuations are adjusted to reflect illiquidity and or non-transferability. These assumptions are not corroborated by market data. This is comprised of financial instruments whose fair value is estimated based on internally developed models or methodologies utilizing significant inputs that are generally less readily observable from objective sources. Management uses a combination of reviews of the underlying financial statements, appraisals and management’s judgment regarding credit quality to determine the value of the financial asset or liability. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management maximizes the use of observable inputs and attempts to minimize the use of unobservable inputs when determining fair value measurements. The following is a description of both the general and specific valuation methodologies used for certain instruments measured at fair value, as well as the general classification of these instruments pursuant to the valuation hierarchy. Investment Securities Available-for-Sale and Held-to-Maturity Securities classified as available-for-sale are accounted for at their current fair value rather than amortized historical cost. Unrealized gains or losses are excluded from net income and reported as an amount net of taxes as a separate component of accumulated other comprehensive income included in shareholders’ equity. Securities classified as held-to-maturity are accounted for at their amortized historical cost. The Company considers the inputs utilized to fair value the U.S. Agency and U.S. Sponsored Agency issued debt securities (callable and non-callable notes), mortgage backed securities guaranteed by those agencies, collateralized mortgage obligations issued by those agencies, corporate bond securities, and municipal securities to be observable market inputs and classified these financial assets within the Level 2 fair value hierarchy. Management bases the fair value for these investments primarily on third party price indications provided by independent pricing sources utilized by the Company’s bond accounting system to obtain market pricing on its individual securities. Vining Sparks, who provides the Company with its bond accounting system, utilizes pricing from three independent third party pricing sources for pricing of securities. These third party pricing sources utilize, quoted market prices or when quoted market prices are not available, then fair values are estimated using nationally recognized third-party vendor pricing models of which the inputs are observable. However, the fair value reported may not be indicative of the amounts that could be realized in an actual market exchange. The fair value of the Company’s U.S. Agency and U.S. Sponsored Agency callable and non-callable agency securities, mortgage backed securities guaranteed by those agencies, and collateralized mortgage obligations issued by those agencies, corporate bond securities, and municipal securities are calculated using an option adjusted spread model from one of the nationally recognized third-party pricing models. Depending on the assumptions used and the treasury yield curve and other interest rate assumptions, the fair value could vary significantly in the near term. Loans Impaired Loans Interest Rate Swap Contracts Other Real Estate Owned SBA Servicing Asset Non-Maturing Deposits Maturing Deposits Securities Sold under Agreements to Repurchase (“Repos”) Subordinated Debentures Fair Value of Commitments : Interest Rate Risk Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table summarizes the financial assets and financial liabilities measured at fair value on a recurring basis as of the dates indicated, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands): Fair Value Quoted Prices Significant Significant Financial Assets – September 30, 2015 Investment securities available-for-sale $ 256,085 $ — $ 256,085 $ — Interest Rate Swap Contracts 1,298 — 1,298 — Financial Liabilities – September 30, 2015 Interest Rate Swap Contracts $ 3,386 $ — $ 3,386 $ — Financial Assets – December 31, 2014 Investment securities available-for-sale $ 226,962 $ — $ 226,962 $ — Interest Rate Swap Contracts 719 — 719 — Financial Liabilities – December 31, 2014 Interest Rate Swap Contracts $ 3,515 $ — $ 3,515 $ — At December 31, 2014 and at September 30, 2015 the Company had no financial assets or liabilities that were measured at fair value on a recurring basis that required the use of significant unobservable inputs (Level 3). Additionally, there were no transfers of assets either between Level 1 and Level 2 nor in or out of Level 3 of the fair value hierarchy for assets measured on a recurring basis for the three months and nine months ended September 30, 2015 and 2014. Assets Measured at Fair Value on a Non-recurring Basis The Company may be required periodically, to measure certain financial assets and financial liabilities at fair value on a nonrecurring basis, that is, the instruments are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). These include assets that are measured at the lower of cost or market value that were recognized at fair value below cost at the end of or during the period. There were no transfers of assets either between Level 1 and Level 2 nor in or out of Level 3 of the fair value hierarchy for assets measured on a non-recurring basis for the three and nine months ended September 30, 2015. The following table presents the balances of assets and liabilities measured at fair value on a non-recurring basis by caption and by level within the fair value hierarchy as of the dates indicated (dollars in thousands): Recorded Investment Carrying Value Quoted Prices Significant Significant Financial Assets – September 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 751 $ — $ — $ 751 Other real estate owned 1,292 — — 1,292 Total $ 2,043 $ — $ — $ 2,043 Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 1,172 $ — $ — $ 1,172 Other real estate owned 850 — — 850 Total $ 2,022 $ — $ — $ 2,022 The following table presents the significant unobservable inputs used in the fair value measurements for Level 3 assets and liabilities measured at fair value on a recurring or non-recurring basis as of the dates indicated (dollars in thousands): Fair Value Valuation Methodology Valuation Model and/or Factors Unobservable Financial Assets – September 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 751 Credit loss estimate of Credit loss factors on 20%-80% Estimated selling costs 16% Other real estate owned 1,292 Commercial real estate Executed sale contract Sales approach Estimated selling costs 6% Total $ 2,043 Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 1,172 Credit loss estimate of Credit loss factors on 10%-80% Estimated selling costs 15% Other real estate owned 850 Residential real estate Sales approach Estimated selling costs 6% Total $ 2,022 Fair Value of Financial Assets and Liabilities ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or on a non-recurring basis. The estimated fair value amounts have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to develop the estimates of fair value. Accordingly, the estimates presented below are not necessarily indicative of the amounts the Company could have realized in a current market exchange as of September 30, 2015 and December 31, 2014. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. The description of the valuation methodologies used for assets and liabilities measured at fair value and for estimating fair value for financial instruments not recorded at fair value has been described above. The table below presents the carrying amounts and fair values of financial instruments based on their fair value hierarchy indicated (dollars in thousands): Fair Value Measurements Carrying Fair Value Quoted Prices Significant Significant September 30, 2015 Financial Assets Investment securities available-for-sale $ 256,085 256,085 $ — $ 256,085 $ — Investment securities held-to-maturity 43,269 43,422 — 43,422 — Loans, net 1,756,382 1,797,338 — — 1,797,338 Interest rate swap contracts 1,298 1,298 — 1,298 — Financial Liabilities Certificates of deposit 62,320 62,320 — 62,320 — Securities sold under agreements to repurchase 16,698 16,698 — 16,698 — Subordinated debentures 9,657 12,372 — 12,372 — Interest rate swap contracts 3,386 3,386 — 3,386 — December 31, 2014 Financial Assets Investment securities available-for-sale $ 226,962 226,962 $ — $ 226,962 $ — Investment securities held-to-maturity 47,147 47,159 — 47,159 — Loans, net 1,612,113 1,627,717 — — 1,627,717 Interest rate swap contracts 719 719 — 719 — Financial Liabilities Certificates of deposit 64,840 64,857 — 64,857 — Securities sold under agreements to repurchase 9,411 9,411 — 9,411 — Subordinated debentures 9,538 12,372 — 12,372 — Interest rate swap contracts 3,515 3,515 — 3,515 —

Basis of Financial Statement 24

Basis of Financial Statement Presentation (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In addition, these accounting principles require the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements. Estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan loss and various assets and liabilities measured at fair value. While management uses the most current available information to recognize losses on loans, future additions to the allowance for loan loss may be necessary based on, among other factors, changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan loss. Regulatory agencies may require the Company to recognize additions to the allowance for loan loss based on their judgment about information available to them at the time of their examination.
Business Segments	Business Segments The Company is organized and operated as a single reporting segment, principally engaged in commercial business banking. The Company conducts its lending and deposit operations through ten full service branch offices located in Los Angeles, Orange, Ventura and San Bernardino counties.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value of Loans Pursuant to Accounting Standards for PCI and Non-PCI Loans	The following table presents the fair value of loans pursuant to accounting standards for PCI and non-PCI loans as of the 1 st November 30, 2014 PCI loans Non-PCI loans Total Contractually required payments $ 577 $ 569,276 $ 569,853 Less: non-accretable difference (108 ) — (108 ) Cash flows expected to be collected (undiscounted) 469 569,276 569,745 Accretable yield — (16,562 ) (16,562 ) Fair value of acquired loans $ 469 $ 552,714 $ 553,183
1st Enterprise Bank
Fair Values of Consideration Paid, Assets Acquired and Liabilities Assumed as of Date of Acquisition	In connection with the merger, the consideration paid, the assets acquired, and the liabilities assumed were recorded at fair value on the date of acquisition, as summarized in the following table (dollars in thousands): November 30, 2014 Assets acquired: Cash and due from banks $ 8,739 Interest earning deposits in other financial institutions 11,554 Investment securities available-for-sale 117,407 Investment securities held-to-maturity 47,457 Loans 553,183 Premises and equipment, net 1,830 Deferred tax asset 5,682 Goodwill 51,658 Core deposit and leasehold right intangibles 7,533 Bank owned life insurance 16,871 Accrued interest receivable and other assets 11,583 Total assets acquired $ 833,497 Liabilities assumed: Deposits $ 703,358 Accrued interest payable and other liabilities 1,856 Total liabilities assumed $ 705,214 Total consideration paid: CU Bancorp common stock issued $ 102,712 CU Bancorp preferred stock issued 15,921 Fair value of 1st Enterprise stock options 9,561 Cash paid to a dissenter shareholder 87 Cash in lieu of fractional shares paid to 1st Enterprise shareholders 2 Total Consideration $ 128,283

Computation of Book Value and26

Computation of Book Value and Tangible Book Value per Common Share (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Computation of Book Value and Tangible Book Value per Common Share	The tables below present the computation of book value and tangible book value per common share as of the dates indicated (dollars in thousands, except share and per share data): September 30, 2015 December 31, Total Shareholders’ Equity $ 298,348 $ 279,192 Less: Preferred stock 16,739 16,004 Less: Goodwill 63,950 63,950 Less: Core deposit and leasehold right intangibles 8,138 9,547 Tangible common equity $ 209,521 $ 189,691 Common shares issued 16,870,936 16,683,856 Book value per common share $ 16.69 $ 15.78 Tangible book value per common share $ 12.42 $ 11.37

Computation of Earnings per C27

Computation of Earnings per Common Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Common Share Computations	The following table shows weighted average basic shares outstanding, potential dilutive shares related to stock options, unvested restricted stock and restricted stock units, and weighted average diluted shares for the periods indicated (dollars in thousands, except share and per share data): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net Income $ 6,263 $ 2,549 $ 15,729 $ 7,601 Less: Preferred stock dividends and discount accretion 293 — 877 — Net Income available to common shareholders $ 5,970 $ 2,549 $ 14,852 $ 7,601 Weighted average basic common shares outstanding 16,541,380 10,986,065 16,477,206 10,937,507 Dilutive effect of potential common share issuances from stock options, restricted stock and restricted stock units 456,684 203,837 446,296 210,154 Weighted average diluted common shares outstanding 16,998,064 11,189,902 16,923,502 11,147,661 Income per common share Basic $ 0.36 $ 0.23 $ 0.90 $ 0.70 Diluted $ 0.35 $ 0.23 $ 0.88 $ 0.68 Anti-dilutive shares not included in the calculation of diluted earnings per share — 81,000 43,259 82,625

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Gross Unrealized Gains and Losses, and Fair Values of Investment Securities	The following tables present the amortized cost, gross unrealized gains and losses, and fair values of investment securities by major category as of the dates indicated (dollars in thousands): Gross Unrealized September 30, 2015 Amortized Cost Gains Losses Fair Value Available-for-sale: U.S. Govt Agency and Sponsored Agency - Note Securities $ 1,018 $ 4 $ — $ 1,022 U.S. Govt Agency - SBA Securities 76,238 665 371 76,532 U.S. Govt Agency - GNMA Mortgage-Backed Securities 32,607 243 252 32,598 U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities 97,568 622 285 97,905 Corporate Securities 4,023 29 — 4,052 Municipal Securities 1,017 3 — 1,020 Asset Backed Securities 8,113 — 254 7,859 U.S. Treasury Notes 35,047 50 — 35,097 Total available-for-sale 255,631 1,616 1,162 256,085 Held-to-maturity: Municipal Securities 43,269 224 71 43,422 Total held-to-maturity 43,269 224 71 43,422 Total investment securities $ 298,900 $ 1,840 $ 1,233 $ 299,507 Gross Unrealized December 31, 2014 Amortized Cost Gains Losses Fair Value Available-for-sale: U.S. Govt Agency and Sponsored Agency - Note Securities $ 2,036 $ 2 $ — $ 2,038 U.S. Govt Agency - SBA Securities 54,062 770 345 54,487 U.S. Govt Agency - GNMA Mortgage-Backed Securities 29,364 255 277 29,342 U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities 107,348 457 577 107,228 Corporate Securities 4,043 77 — 4,120 Municipal Securities 1,039 11 — 1,050 Asset Backed Securities 8,711 1 40 8,672 U.S. Treasury Notes 20,031 — 6 20,025 Total available-for-sale 226,634 1,573 1,245 226,962 Held-to-maturity: Municipal Securities 47,147 169 157 47,159 Total held-to-maturity 47,147 169 157 47,159 Total investment securities $ 273,781 $ 1,742 $ 1,402 $ 274,121
Gross Unrealized Losses and Fair Values of AFS and HTM Investment Securities that were in Unrealized Loss Positions	The following tables present the gross unrealized losses and fair values of AFS and HTM investment securities that were in unrealized loss positions, summarized and classified according to the duration of the loss period as of the dates indicated (dollars in thousands). < 12 Continuous Months > 12 Continuous Months Total September 30, 2015 Fair Value Gross Fair Value Gross Fair Value Gross Temporarily-impaired available-for-sale investment securities: U.S. Govt. Agency SBA Securities $ 27,938 $ 204 $ 11,904 $ 167 $ 39,842 $ 371 U.S. Govt. Agency – GNMA Mortgage-Backed Securities 8,569 69 7,421 183 15,990 252 U.S. Govt. Sponsored Agency – CMO & Mortgage-Backed Securities 38,563 194 4,079 91 42,642 285 Asset Backed Securities 7,859 254 — — 7,859 254 Total temporarily-impaired available-for-sale investment securities $ 82,929 $ 721 $ 23,404 $ 441 $ 106,333 $ 1,162 Temporarily-impaired held-to-maturity investment securities: Municipal Securities $ 10,932 $ 71 $ — $ — $ 10,932 $ 71 Total temporarily-impaired held-to-maturity investment securities $ 10,932 $ 71 $ — $ — $ 10,932 $ 71 < 12 Continuous Months > 12 Continuous Months Total December 31, 2014 Fair Value Gross Fair Value Gross Fair Value Gross Temporarily-impaired available-for-sale investment securities: U.S. Govt. Agency SBA Securities $ 10,688 $ 87 $ 10,095 $ 258 $ 20,783 $ 345 U.S. Govt. Agency – GNMA Mortgage-Backed Securities 12,784 65 8,784 212 21,568 277 U.S. Govt. Sponsored Agency – CMO & Mortgage-Backed Securities 64,360 413 6,584 164 70,944 577 Asset Backed Securities 4,849 40 — — 4,849 40 U.S Treasury Notes 20,025 6 — — 20,025 6 Total temporarily-impaired available-for-sale investment securities $ 112,706 $ 611 $ 25,463 $ 634 $ 138,169 $ 1,245 Temporarily-impaired held-to-maturity investment securities: Municipal Securities $ 23,966 $ 157 $ — $ — $ 23,966 $ 157 Total temporarily-impaired held-to-maturity investment securities $ 23,966 $ 157 $ — $ — $ 23,966 $ 157
Maturities Schedule of Securities	September 30, 2015 Maturities Schedule of Securities (Dollars in thousands) Amortized Fair Value Weighted Available-for-sale: Due through one year $ 51,864 $ 52,087 1.22 % Due after one year through five years 100,939 101,176 1.50 % Due after five years through ten years 64,028 63,949 1.85 % Due after ten years 38,800 38,873 2.45 % Total available-for-sale 255,631 256,085 1.67 % Held-to-maturity: Due through one year 3,743 3,747 2.04 % Due after one year through five years 31,557 31,646 1.52 % Due after five years through ten years 7,969 8,029 1.94 % Total held-to-maturity 43,269 43,422 1.65 % Total investment securities $ 298,900 $ 299,507 1.67 %

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Composition of Loan Portfolio	The following table presents the composition of the Company’s loan portfolio as of the dates indicated (dollars in thousands): September 30, 2015 December 31, Commercial and Industrial Loans: $ 556,462 $ 528,517 Loans Secured by Real Estate: Owner-Occupied Nonresidential Properties 376,579 339,309 Other Nonresidential Properties 515,402 481,517 Construction, Land Development and Other Land 94,353 72,223 1-4 Family Residential Properties 125,635 121,985 Multifamily Residential Properties 65,275 52,813 Total Loans Secured by Real Estate 1,177,244 1,067,847 Other Loans: 37,641 28,359 Total Loans $ 1,771,347 $ 1,624,723
Company's Loan Portfolio Stratified by Industry Concentration of Borrower	The following table is a breakout of the Company’s loan portfolio stratified by the industry concentration of the borrower by their respective NAICS code as of the dates indicated (dollars in thousands): September 30, December 31, Real Estate $ 811,868 $ 744,663 Manufacturing 167,152 161,233 Wholesale 129,952 124,336 Construction 154,085 113,763 Finance 113,956 96,074 Hotel/Lodging 101,239 88,269 Professional Services 53,147 64,215 Other Services 47,041 45,781 Healthcare 47,359 43,917 Retail 36,777 35,503 Administrative Management 26,164 28,016 Restaurant/Food Service 31,884 24,525 Transportation 21,596 18,158 Information 8,756 15,457 Education 9,192 10,253 Entertainment 5,610 8,284 Other 5,569 2,276 Total $ 1,771,347 $ 1,624,723
Summary of Activity for Allowance for Loan Loss	The following table is a summary of the activity for the allowance for loan loss for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Allowance for loan loss at beginning of period $ 14,124 $ 11,284 $ 12,610 $ 10,603 Provision for loan losses 705 35 2,831 518 Net (charge-offs) recoveries: Charge-offs (42 ) (8 ) (933 ) (165 ) Recoveries 178 37 457 392 Net (charge-offs) recoveries 136 29 (476 ) 227 Allowance for loan loss at end of period $ 14,965 $ 11,348 $ 14,965 $ 11,348 Net (charge-offs) recoveries to average loans 0.01 % 0.00 % (0.03 )% (0.02 )% September 30, 2015 December 31, 2014 Allowance for loan loss to total loans 0.84 % 0.78 % Allowance for loan loss to total loans accounted for at historical cost, which excludes loans and the related allowance for loans acquired through acquisition 1.30 % 1.39 %
Changes in Allowance for Loan Loss	The following tables present, by portfolio segment, the changes in the allowance for loan loss and the recorded investment in loans as of the dates and for the periods indicated (dollars in thousands): Commercial and Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total Three Months Ended September 30, 2015 Allowance for loan loss – Beginning balance $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Provision for loan losses 181 371 143 10 705 Net (charge-offs) recoveries: Charge-offs — — (42 ) — (42 ) Recoveries 177 — 1 — 178 Net (charge offs) recoveries 177 — (41 ) — 136 Ending balance $ 6,602 $ 1,978 $ 5,901 $ 484 $ 14,965 Three Months Ended September 30, 2014 Allowance for loan loss – Beginning balance $ 5,385 $ 1,422 $ 4,426 $ 51 $ 11,284 Provision for loan losses 333 (205 ) (429 ) 336 35 Net (charge-offs) recoveries: Charge-offs — — (8 ) — (8 ) Recoveries 36 — 1 — 37 Net (charge-offs) recoveries 36 — (7 ) — 29 Ending balance $ 5,754 $ 1,217 $ 3,990 $ 387 $ 11,348 Commercial and Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total Nine Months Ended September 30, 2015 Allowance for loan loss – Beginning balance $ 5,864 $ 1,684 $ 4,802 $ 260 $ 12,610 Provision for loan losses 1,176 294 1,137 224 2,831 Net (charge-offs) recoveries: Charge-offs (891 ) — (42 ) — (933 ) Recoveries 453 — 4 — 457 Net (charge-offs) recoveries (438 ) — (38 ) — (476 ) Ending balance $ 6,602 $ 1,978 $ 5,901 $ 484 $ 14,965 Nine Months Ended September 30, 2014 Allowance for loan loss – Beginning balance $ 5,534 $ 1,120 $ 3,886 $ 63 $ 10,603 Provision for loan losses 25 97 72 324 518 Net (charge-offs) recoveries: Charge-offs (93 ) — (72 ) — (165 ) Recoveries 288 — 104 — 392 Net (charge-offs) recoveries 195 — 32 — 227 Ending balance $ 5,754 $ 1,217 $ 3,990 $ 387 $ 11,348
Schedule Represents both Allowance for Loan Loss and Associated Loan Balance Classified by Loan Portfolio Segment and by Credit Evaluation Methodology	The following tables present both the allowance for loan loss and the associated loan balance classified by loan portfolio segment and by credit evaluation methodology (dollars in thousands): Commercial Industrial Construction, Other Land Commercial Other Real Estate Other Total September 30, 2015 Allowance for loan loss: Individually evaluated for impairment $ 577 $ — $ — $ — $ 577 Collectively evaluated for impairment 6,025 1,978 5,901 484 14,388 Purchased credit impaired (loans acquired with deteriorated credit quality) — — — — — Total Allowance for Loan Loss $ 6,602 $ 1,978 $ 5,901 $ 484 $ 14,965 Loans receivable: Individually evaluated for impairment $ 3,446 $ — $ 99 $ — $ 3,545 Collectively evaluated for impairment 552,634 94,353 1,081,258 37,641 1,765,886 Purchased credit impaired (loans acquired with deteriorated credit quality) 382 — 1,534 — 1,916 Total Loans Receivable $ 556,462 $ 94,353 $ 1,082,891 $ 37,641 $ 1,771,347 Commercial Industrial Construction, Other Land Commercial Other Real Estate Other Total December 31, 2014 Allowance for loan loss: Individually evaluated for impairment $ 222 $ — $ — $ — $ 222 Collectively evaluated for impairment 5,642 1,684 4,802 260 12,388 Purchased credit impaired (loans acquired with deteriorated credit quality) — — — — — Total Allowance for Loan Loss $ 5,864 $ 1,684 $ 4,802 $ 260 $ 12,610 Loans receivable: Individually evaluated for impairment $ 1,914 $ — $ 737 $ — $ 2,651 Collectively evaluated for impairment 525,910 72,223 993,195 28,359 1,619,687 Purchased credit impaired (loans acquired with deteriorated credit quality) 693 — 1,692 — 2,385 Total Loans Receivable $ 528,517 $ 72,223 $ 995,624 $ 28,359 $ 1,624,723
Risk Category of Loans by Class of Loans	The following tables present the risk category of loans by class of loans based on the most recent internal loan classification as of the dates indicated (dollars in thousands): Commercial Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total September 30, 2015 Pass $ 527,311 $ 94,353 $ 1,054,807 $ 37,640 $ 1,714,111 Special Mention 11,862 — 8,103 — 19,965 Substandard 17,289 — 19,981 1 37,271 Doubtful — — — — — Total $ 556,462 $ 94,353 $ 1,082,891 $ 37,641 $ 1,771,347 December 31, 2014 Pass $ 502,624 $ 72,223 $ 977,525 $ 28,358 $ 1,580,730 Special Mention 8,738 — 4,878 — 13,616 Substandard 17,155 — 13,221 1 30,377 Doubtful — — — — — Total $ 528,517 $ 72,223 $ 995,624 $ 28,359 $ 1,624,723
Aging Analysis of Recorded Investment	The following tables present an aging analysis of the recorded investment of past due loans and non-accrual loans as of the dates indicated (dollars in thousands): 31-60 Days Past Due 61-90 Days Past Due Greater 90 Days Past Due and Total Past Due and Total Non- Accrual Current Total Loans September 30, 2015 Commercial and Industrial $ 85 $ 11 $ — $ 96 $ 3,826 $ 552,540 $ 556,462 Construction, Land Development and Other Land — — — — — 94,353 94,353 Commercial and Other Real Estate — 391 — 391 478 1,082,022 1,082,891 Other — — — — — 37,641 37,641 Total $ 85 $ 402 $ — $ 487 $ 4,304 $ 1,766,556 $ 1,771,347 31-60 Days Past Due 61-90 Days Past Due Greater 90 Days Past Due and Total Past Due and Total Non- Accrual Current Total Loans December 31, 2014 Commercial and Industrial $ 192 $ 233 $ — $ 425 $ 2,604 $ 525,488 $ 528,517 Construction, Land Development and Other Land — — — — — 72,223 72,223 Commercial and Other Real Estate 354 — — 354 1,305 993,965 995,624 Other — — — — — 28,359 28,359 Total $ 546 $ 233 $ — $ 779 $ 3,909 $ 1,620,035 $ 1,624,723
Recorded Investment and Unpaid Principal Balances for Impaired Loans	The following tables present, by loan category, the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount, if applicable, for the dates and periods indicated (dollars in thousands). This table excludes purchased credit impaired loans (loans acquired in acquisitions with deteriorated credit quality) of $3 million and $2 million at September 30, 2015 and December 31, 2014, respectively. September 30, 2015 December 31, 2014 Recorded Unpaid Related Recorded Unpaid Related With no specific allowance recorded: Commercial and Industrial $ 2,118 $ 3,629 $ — $ 520 $ 609 $ — Commercial and Other Real Estate 99 105 — 737 739 — — With a specific allowance recorded: Commercial and Industrial 1,328 1,479 577 1,394 1,546 222 Total Commercial and Industrial 3,446 5,108 577 1,914 2,155 222 Commercial and Other Real Estate 99 105 — 737 739 — Total $ 3,545 $ 5,213 $ 577 $ 2,651 $ 2,894 $ 222 Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Average Interest Average Interest Average Interest Average Interest With no specific allowance recorded: Commercial and Industrial $ 2,118 $ — $ 1,051 $ — $ 1,757 $ — $ 1,035 $ 34 Commercial and Other Real Estate 99 — 2,960 — 104 — 3,207 — With a specific allowance recorded: Commercial and Industrial 1,328 — 1,494 — 1,328 — 1,533 — Commercial and Other Real Estate 413 — — 550 — — Total: Commercial and Industrial 3,446 — 2,545 — 3,085 — 2,568 34 Commercial and Other Real Estate 512 — 2,960 — 654 — 3,207 — Total $ 3,958 $ — $ 5,505 $ — $ 3,739 $ — $ 5,775 $ 34
Additional Information on Impaired Loans	The following is a summary of additional information pertaining to impaired loans for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Interest foregone on impaired loans $ 81 $ 72 $ 238 $ 346 Cash collections applied to reduce principal balance $ 23 $ 18 $ 186 $ 2,889 Interest income recognized on cash collections $ — $ — $ — $ 34
Recorded Investment and Unpaid Principal Balances for Troubled Debt Restructured Loans	The following tables include the recorded investment and unpaid principal balances for troubled debt restructured loans at September 30, 2015 and December 31, 2014 (dollars in thousands). These tables include TDR loans that were purchased credit impaired (“PCI”). As of September 30, 2015, there were two PCI loans that are considered to be TDR loans with a recorded investment of $161,000 and unpaid principal balances of $344,000. Recorded Unpaid Interest Income Recognized As of and for the period ended September 30, 2015 Commercial and Industrial $ 1,780 $ 2,385 $ — Commercial and Other Real Estate 99 105 — Total $ 1,879 $ 2,490 $ — Recorded Unpaid Interest Income Recognized As of and for the year ended December 31, 2014 Commercial and Industrial $ 530 $ 719 $ — Commercial and Other Real Estate 114 115 — Total $ 644 $ 834 $ —
Pre and Post Modification Recorded Investment in TDR Loans	The following table shows the pre- and post-modification recorded investment in TDR loans by loan segment that have occurred during the periods indicated (dollars in thousands): Three Months Ended September 30, 2015 2014 Number Loans Pre- Modification Post- Number Loans Pre-Modification Post- Troubled Debt Restructured Loans: Commercial and Industrial 3 $ 1,335 $ 1,335 — $ — $ — Total 3 $ 1,335 $ 1,335 — $ — $ — Nine Months Ended September 30, 2015 2014 Number Loans Pre-Modification Post- Number Loans Pre-Modification Post- Troubled Debt Restructured Loans: Commercial and Industrial 3 $ 1,335 $ 1,335 1 $ 224 $ 224 Total 3 $ 1,335 $ 1,335 1 $ 224 $ 224
Accretable Yield for Loans Acquired	The following table reflects the accretable net discount for loans acquired through acquisition, for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Balance, beginning of period $ 18,255 $ 6,412 $ 21,402 $ 7,912 Accretion, included in interest income (1,463 ) (813 ) (4,140 ) (2,264 ) Reclassifications (to) from non-accretable yield (5 ) — (475 ) (49 ) Balance, end of period $ 16,787 $ 5,599 $ 16,787 $ 5,599
Carrying Value of Purchased Credit Impaired Loans	The following table reflects the outstanding balance and related carrying value of PCI loans as of the dates indicated (dollars in thousands): September 30, 2015 December 31, 2014 Unpaid Carrying Value Unpaid Carrying Value Commercial and Industrial $ 710 $ 382 $ 1,205 $ 693 Commercial and Other Real Estate 2,262 1,534 3,018 1,692 Other — — 62 — Total $ 2,972 $ 1,916 $ 4,285 $ 2,385
Accretable Net Discount of Purchased Credit Impaired Loans	The following table reflects the activities in the accretable net discount for PCI loans for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Balance, beginning of period $ 286 $ 360 $ 324 $ 395 Accretion, included in interest income (20 ) (18 ) (58 ) (53 ) Reclassifications from non-accretable yield — — — — Balance, end of period $ 266 $ 342 $ 266 $ 342

Borrowings and Subordinated D30

Borrowings and Subordinated Debentures (Tables)	9 Months Ended
	Sep. 30, 2015
Brokers and Dealers [Abstract]
Terms and Maturity of Bank's Securities Sold under Agreements	The tables below describe the terms and maturity of the Company’s securities sold under agreements to repurchase as of the dates indicated (dollars in thousands): September 30, 2015 Date Issued Amount Interest Rate Original Maturity Date September 30, 2015 $ 16,698 0.10% – 0.25 % 1 day October 1, 2015 Total $ 16,698 0.22 % December 31, 2014 Date Issued Amount Interest Rate Original Maturity Date December 31, 2014 $ 9,411 0.13% – 0.25 % 2 days January 2, 2015 Total $ 9,411 0.20 %
Terms of Issuance Subordinated Debentures Outstanding	The following table summarizes the terms of each issuance of subordinated debentures outstanding as of September 30, 2015: Series Amount (in thousands) Issuance Maturity Rate Index Current Next Trust I $ 6,186 12/10/04 03/15/35 3 month LIBOR + 2.05 % 2.39 % 12/15/15 Trust II 3,093 12/23/05 03/15/36 3 month LIBOR + 1.75 % 2.09 % 12/15/15 Trust III 3,093 06/30/06 09/18/36 3 month LIBOR + 1.85 % 2.19 % 12/15/15 Subtotal 12,372 Unamortized fair value adjustment (2,715 ) Net $ 9,657

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2015
Effect of All Derivative Instruments on Consolidated Statements of Income	The following table summarizes the effect of all derivative financial instruments on the consolidated statements of income for the periods indicated (dollars in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Derivatives not designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 41 $ 86 $ 124 $ 179 Payments on interest rate swap contracts on loans (66 ) (69 ) (198 ) (205 ) Net increase (decrease) in other non-interest income $ (25 ) $ 17 $ (74 ) $ (26 ) Derivatives designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 142 $ 361 $ 583 $ 663 Increase (decrease) in fair value of hedged loans 191 (104 ) 279 135 Payment on interest rate swap contracts on loans (275 ) (317 ) (846 ) (950 ) Net increase (decrease) in interest income on loans $ 58 $ (60 ) $ 16 $ (152 )
1st Enterprise Bank
Balance Sheet Classification of Derivative Financial Instruments	The following tables present the notional amount and the fair values of the asset and liability of the Company’s derivative instruments acquired from 1 st Asset Derivatives September 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 1,298 $ 719 Balance sheet location Accrued Interest Receivable and Other Assets Accrued Interest Receivable and Other Assets The following table presents the fair values of the liability of the Company’s derivative instruments acquired from 1 st Liability Derivatives September 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 1,298 $ 719 Balance sheet location Accrued Interest Accrued Interest
PC Bancorp
Balance Sheet Classification of Derivative Financial Instruments	The following table presents the notional amount and the fair values of the asset and liability of the Company’s derivative instruments acquired from PC Bancorp as of the dates indicated (dollars in thousands): Liability Derivatives September 30, 2015 December 31, 2014 Fair Value Hedges Total interest rate contacts notional amount $ 26,226 $ 29,289 Derivatives not designated as hedging instruments: Interest rate swap contracts fair value $ 394 $ 519 Derivatives designated as hedging instruments: Interest rate swap contracts fair value 1,694 2,277 Total interest rate contracts fair value $ 2,088 $ 2,796 Balance sheet location Accrued Interest Payable and Other Liabilities Accrued Interest Payable and Other Liabilities

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Securities Sold under Repurchase Agreements and Derivatives Securities Offset in Consolidated Financial Statements Due to an Enforceable Master Netting Arrangement	The table below presents the Company’s financial instruments that may be eligible for offsetting which include securities sold under agreements to repurchase that have no enforceable master netting arrangement and derivative securities that could be offset in the consolidated financial statements due to an enforceable master netting arrangement (dollars in thousands): Gross Gross Net Amounts of Assets in the Gross Amounts Not Offset in the Consolidated Balance Sheets Net Amount Financial Collateral September 30, 2015 Financial Assets: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 1,298 $ — $ 1,298 $ 1,298 $ — $ — Total $ 1,298 $ — $ 1,298 $ 1,298 $ — $ — Financial Liabilities: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 3,386 $ — $ 3,386 $ 3,386 $ 4,306 $ 920 Securities sold under agreements to repurchase (See Note 9 – Borrowings and Subordinated Debentures) 16,698 — 16,698 16,698 49,139 32,441 Total $ 20,084 $ — $ 20,084 $ 20,084 $ 53,445 $ 33,361 Gross Gross Net in the Gross Amounts Not Offset in the Consolidated Balance Sheets Net Amount Financial Collateral December 31, 2014 Financial Assets: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 719 $ — $ 719 $ 719 $ — $ — Total $ 719 $ — $ 719 $ 719 $ — $ — Financial Liabilities: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 3,515 $ — $ 3,515 $ 3,515 $ 4,150 $ 635 Securities sold under agreements to repurchase (See Note 9 – Borrowings and Subordinated Debentures) 9,411 — 9,411 9,411 32,304 22,893 Total $ 12,926 $ — $ 12,926 $ 12,926 $ 36,454 $ 23,528

Stock Options and Restricted 33

Stock Options and Restricted Stock (Tables)	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Future Compensation Expense Related to Unvested Restricted Stock Grants	At September 30, 2015, future compensation expense related to unvested restricted stock grants are reflected in the table below (dollars in thousands): Restricted Stock Expense Remainder of 2015 $ 676 2016 1,879 2017 760 2018 273 2019 31 Thereafter — Total $ 3,619
Share Option Activity	The following table summarizes the share option activity under the plans as of the date and for the period indicated: Shares Weighted Weighted Aggregate Outstanding stock options at December 31, 2014 1,016,490 $ 10.13 1.6 $ 11,770 Granted — Exercised (158,315 ) Forfeited (5,000 ) Expired — Outstanding stock options at September 30, 2015 853,175 $ 10.26 0.9 $ 10,467 Exercisable options at September 30, 2015 853,175 $ 10.26 0.9 $ 10,467 Unvested options at September 30, 2015 —
Restricted Stock Activity	The following table summarizes the restricted stock activity under the Equity Plan for the period indicated: Number of Shares Weighted-Average Grant-Date Fair Value Restricted Stock: Unvested at December 31, 2014 309,506 $ 16.41 Granted 77,800 20.95 Vested (99,750 ) 13.42 Cancelled and forfeited (9,175 ) 16.50 Unvested at September 30, 2015 278,381 $ 18.74

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	The following table presents the changes in accumulated other comprehensive income (loss) by component for the periods indicated (dollars in thousands): Before Tax Tax Effect Net of Tax Three Months Ended – September 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ (82 ) $ (34 ) $ (48 ) Net unrealized gains arising during the period 536 225 311 Ending balance $ 454 $ 191 $ 263 Before Tax Tax Effect Net of Tax Three Months Ended – September 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ 331 $ 136 $ 195 Net unrealized gains arising during the period 19 11 8 Ending balance $ 350 $ 147 $ 203 Before Tax Tax Effect Net of Tax Nine Months Ended – September 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ 333 $ 143 $ 190 Net unrealized gains arising during the period 121 48 73 Ending balance $ 454 $ 191 $ 263 Before Tax Tax Effect Net of Tax Nine Months Ended – September 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ (348 ) $ (143 ) $ (205 ) Net unrealized gains arising during the period 698 290 408 Ending balance $ 350 $ 147 $ 203

Fair Value of Assets and Liab35

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes the financial assets and financial liabilities measured at fair value on a recurring basis as of the dates indicated, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands): Fair Value Quoted Prices Significant Significant Financial Assets – September 30, 2015 Investment securities available-for-sale $ 256,085 $ — $ 256,085 $ — Interest Rate Swap Contracts 1,298 — 1,298 — Financial Liabilities – September 30, 2015 Interest Rate Swap Contracts $ 3,386 $ — $ 3,386 $ — Financial Assets – December 31, 2014 Investment securities available-for-sale $ 226,962 $ — $ 226,962 $ — Interest Rate Swap Contracts 719 — 719 — Financial Liabilities – December 31, 2014 Interest Rate Swap Contracts $ 3,515 $ — $ 3,515 $ —
Balances of Assets and Liabilities Measured at Fair Value on Non-Recurring Basis	The following table presents the balances of assets and liabilities measured at fair value on a non-recurring basis by caption and by level within the fair value hierarchy as of the dates indicated (dollars in thousands): Recorded Investment Carrying Value Quoted Prices Significant Significant Financial Assets – September 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 751 $ — $ — $ 751 Other real estate owned 1,292 — — 1,292 Total $ 2,043 $ — $ — $ 2,043 Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 1,172 $ — $ — $ 1,172 Other real estate owned 850 — — 850 Total $ 2,022 $ — $ — $ 2,022
Significant Unobservable Inputs Used in Fair Value Measurements for Level 3 Assets and Liabilities Measured at Fair Value on Recurring or Non-Recurring Basis	The following table presents the significant unobservable inputs used in the fair value measurements for Level 3 assets and liabilities measured at fair value on a recurring or non-recurring basis as of the dates indicated (dollars in thousands): Fair Value Valuation Methodology Valuation Model and/or Factors Unobservable Financial Assets – September 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 751 Credit loss estimate of Credit loss factors on 20%-80% Estimated selling costs 16% Other real estate owned 1,292 Commercial real estate Executed sale contract Sales approach Estimated selling costs 6% Total $ 2,043 Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 1,172 Credit loss estimate of Credit loss factors on 10%-80% Estimated selling costs 15% Other real estate owned 850 Residential real estate Sales approach Estimated selling costs 6% Total $ 2,022
Level in Fair Value Hierarchy for Financial Instruments Estimated Fair Values	The table below presents the carrying amounts and fair values of financial instruments based on their fair value hierarchy indicated (dollars in thousands): Fair Value Measurements Carrying Fair Value Quoted Prices Significant Significant September 30, 2015 Financial Assets Investment securities available-for-sale $ 256,085 256,085 $ — $ 256,085 $ — Investment securities held-to-maturity 43,269 43,422 — 43,422 — Loans, net 1,756,382 1,797,338 — — 1,797,338 Interest rate swap contracts 1,298 1,298 — 1,298 — Financial Liabilities Certificates of deposit 62,320 62,320 — 62,320 — Securities sold under agreements to repurchase 16,698 16,698 — 16,698 — Subordinated debentures 9,657 12,372 — 12,372 — Interest rate swap contracts 3,386 3,386 — 3,386 — December 31, 2014 Financial Assets Investment securities available-for-sale $ 226,962 226,962 $ — $ 226,962 $ — Investment securities held-to-maturity 47,147 47,159 — 47,159 — Loans, net 1,612,113 1,627,717 — — 1,627,717 Interest rate swap contracts 719 719 — 719 — Financial Liabilities Certificates of deposit 64,840 64,857 — 64,857 — Securities sold under agreements to repurchase 9,411 9,411 — 9,411 — Subordinated debentures 9,538 12,372 — 12,372 — Interest rate swap contracts 3,515 3,515 — 3,515 —

Basis of Financial Statement 36

Basis of Financial Statement Presentation - Additional Information (Detail)	Sep. 30, 2015Office
Accounting Policies [Abstract]
Full service branch offices	10

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - USD ($)	Nov. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Merger expenses		$ 146,000	$ 631,000	$ 498,000	$ 1,128,000
1st Enterprise Bank
Business Acquisition [Line Items]
Merger date	Jun. 2, 2014
Effective date of acquisition				Nov. 30, 2014
Share received in exchange for each share	1.3450
Common stock issued	5,000,000
Fair value of common stock issued as part of consideration paid	$ 103,000,000
Market price of common stock	$ 19.60
Number of Non-Cumulative Perpetual Preferred Stock, Series D converted to Non-Cumulative Perpetual Preferred Stock, Series A	16,400
Merger expenses		$ 146,000	$ 631,000	$ 498,000	$ 1,000,000
Other intangible assets, amortization period				10 years

Business Combinations - Fair Va

Business Combinations - Fair Values of Consideration Paid, Assets Acquired and Liabilities Assumed as of Date of Acquisition (Detail) - USD ($) $ in Thousands	Nov. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Assets acquired:
Goodwill		$ 63,950	$ 63,950
1st Enterprise Bank
Assets acquired:
Cash and due from banks	$ 8,739
Interest earning deposits in other financial institutions	11,554
Investment securities available-for-sale	117,407
Investment securities held-to-maturity	47,457
Loans	553,183
Premises and equipment, net	1,830
Deferred tax asset	5,682
Goodwill	51,658
Core deposit and leasehold right intangibles	7,533
Bank owned life insurance	16,871
Accrued interest receivable and other assets	11,583
Total assets acquired	833,497
Liabilities assumed:
Deposits	703,358
Accrued interest payable and other liabilities	1,856
Total liabilities assumed	705,214
Total consideration paid:
CU Bancorp issued	103,000
Fair value of 1st Enterprise stock options	9,561
Cash paid to a dissenter shareholder	87
Cash in lieu of fractional shares paid to 1st Enterprise shareholders	2
Total Consideration	128,283
1st Enterprise Bank | Common Stock
Total consideration paid:
CU Bancorp issued	102,712
1st Enterprise Bank | Preferred Stock
Total consideration paid:
CU Bancorp issued	$ 15,921

Business Combinations - Fair 39

Business Combinations - Fair Value of Loans Pursuant to Accounting Standards for PCI and Non-PCI Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Nov. 30, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Accretable yield	$ (16,787)	$ (18,255)	$ (21,402)		$ (5,599)	$ (6,412)	$ (7,912)
PCI loans
Business Acquisition [Line Items]
Accretable yield	$ (266)	$ (286)	$ (324)		$ (342)	$ (360)	$ (395)
1st Enterprise Bank
Business Acquisition [Line Items]
Contractually required payments				$ 569,853
Less: non-accretable difference				(108)
Cash flows expected to be collected (undiscounted)				569,745
Accretable yield				(16,562)
Fair value of acquired loans				553,183
Cash flows expected to be collected (undiscounted)				569,745
1st Enterprise Bank | PCI loans
Business Acquisition [Line Items]
Contractually required payments				577
Less: non-accretable difference				(108)
Cash flows expected to be collected (undiscounted)				469
Fair value of acquired loans				469
Cash flows expected to be collected (undiscounted)				469
1st Enterprise Bank | Non-PCI loans
Business Acquisition [Line Items]
Contractually required payments				569,276
Cash flows expected to be collected (undiscounted)				569,276
Accretable yield				(16,562)
Fair value of acquired loans				552,714
Cash flows expected to be collected (undiscounted)				$ 569,276

Computation of Book Value and40

Computation of Book Value and Tangible Book Value per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Equity [Abstract]
Total Shareholders' Equity	$ 298,348	$ 279,192
Less: Preferred stock	16,739	16,004
Less: Goodwill	63,950	63,950
Less: Core deposit and leasehold right intangibles	8,138	9,547
Tangible common equity	$ 209,521	$ 189,691
Common shares issued	16,870,936	16,683,856
Book value per common share	$ 16.69	$ 15.78
Tangible book value per common share	$ 12.42	$ 11.37

Basic and Diluted Earnings Per

Basic and Diluted Earnings Per Common Share Computations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net Income	$ 6,263	$ 2,549	$ 15,729	$ 7,601
Less: Preferred stock dividends and discount accretion	293		877
Net Income available to common shareholders	$ 5,970	$ 2,549	$ 14,852	$ 7,601
Weighted average basic common shares outstanding	16,541,380	10,986,065	16,477,206	10,937,507
Dilutive effect of potential common share issuances from stock options, restricted stock and restricted stock units	456,684	203,837	446,296	210,154
Weighted average diluted common shares outstanding	16,998,064	11,189,902	16,923,502	11,147,661
Basic income (loss) per share	$ 0.36	$ 0.23	$ 0.90	$ 0.70
Diluted income (loss) per share	$ 0.35	$ 0.23	$ 0.88	$ 0.68
Anti-dilutive shares not included in the calculation of diluted earnings per share		81,000	43,259	82,625

Amortized Cost, Gross Unrealize

Amortized Cost, Gross Unrealized Gains and Losses, and Fair Values of Investment Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 255,631	$ 226,634
Available-for-sale Securities, Gross Unrealized Gains	1,616	1,573
Available-for-sale Securities, Gross Unrealized Losses	1,162	1,245
Fair Value	256,085	226,962
Held-to-maturity Securities, Amortized Cost	43,269	47,147
Held-to-maturity Securities, Gross Unrealized Gain	224	169
Held-to-maturity Securities, Gross Unrealized Losses	71	157
Fair Value	43,422	47,159
Available-for-sale Securities and Held-to-maturity Securities, Amortized Cost	298,900	273,781
Available-for-sale Securities and Held-to-maturity Securities, Gross Unrealized Gain	1,840	1,742
Available-for-sale Securities and Held-to-maturity Securities, Gross Unrealized Losses	1,233	1,402
Available-for-sale Securities and Held-to-maturity Securities, Fair Value	299,507	274,121
Municipal Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	1,017	1,039
Available-for-sale Securities, Gross Unrealized Gains	3	11
Fair Value	1,020	1,050
Held-to-maturity Securities, Amortized Cost	43,269	47,147
Held-to-maturity Securities, Gross Unrealized Gain	224	169
Held-to-maturity Securities, Gross Unrealized Losses	71	157
Fair Value	43,422	47,159
U.S. Govt Agency - GNMA Mortgage-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	32,607	29,364
Available-for-sale Securities, Gross Unrealized Gains	243	255
Available-for-sale Securities, Gross Unrealized Losses	252	277
Fair Value	32,598	29,342
Corporate Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	4,023	4,043
Available-for-sale Securities, Gross Unrealized Gains	29	77
Fair Value	4,052	4,120
Asset Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	8,113	8,711
Available-for-sale Securities, Gross Unrealized Gains		1
Available-for-sale Securities, Gross Unrealized Losses	254	40
Fair Value	7,859	8,672
U. S. Treasury Notes
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	35,047	20,031
Available-for-sale Securities, Gross Unrealized Gains	50
Available-for-sale Securities, Gross Unrealized Losses		6
Fair Value	35,097	20,025
U.S. Govt Agency and Sponsored Agency - Note Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	1,018	2,036
Available-for-sale Securities, Gross Unrealized Gains	4	2
Fair Value	1,022	2,038
U.S. Govt Agency - SBA Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	76,238	54,062
Available-for-sale Securities, Gross Unrealized Gains	665	770
Available-for-sale Securities, Gross Unrealized Losses	371	345
Fair Value	76,532	54,487
U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	97,568	107,348
Available-for-sale Securities, Gross Unrealized Gains	622	457
Available-for-sale Securities, Gross Unrealized Losses	285	577
Fair Value	$ 97,905	$ 107,228

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]
Proceeds from sales of available-for-sale investment securities	$ 0		$ 0	$ 0	$ 0
Securities classified as other-than-temporarily impaired	0			0		$ 0
Company's investment in the common stock of the FHLB	8,000,000			8,000,000		8,000,000
Impairment loss from investments in FHLB				0
Special dividend received from FHLB		$ 296,000
Securities Sold under Agreements to Repurchase
Schedule of Trading Securities and Other Trading Assets [Line Items]
Market value of securities pledged to secure securities sold under agreements to repurchase	$ 203,000,000			$ 203,000,000		$ 148,800,000

Gross Unrealized Losses and Fai

Gross Unrealized Losses and Fair Values of AFS and HTM Investment Securities that were in Unrealized Loss Positions (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	$ 82,929	$ 112,706
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Gross Unrealized Loss	721	611
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	23,404	25,463
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Gross Unrealized Loss	441	634
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	106,333	138,169
Temporarily-impaired available-for-sale investment securities, Total, Gross Unrealized Loss	1,162	1,245
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Fair Value	10,932	23,966
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Gross Unrealized Loss	71	157
Temporarily-impaired held-to-maturity investment securities, More than 12 months, Fair Value	0	0
Temporarily-impaired held-to-maturity investment securities, More than 12 months, Gross Unrealized Loss	0	0
Temporarily-impaired held-to-maturity investment securities, Fair Value	10,932	23,966
Temporarily-impaired held-to-maturity investment securities, Gross Unrealized Loss	71	157
U.S. Govt Agency - GNMA Mortgage-Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	8,569	12,784
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Gross Unrealized Loss	69	65
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	7,421	8,784
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Gross Unrealized Loss	183	212
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	15,990	21,568
Temporarily-impaired available-for-sale investment securities, Total, Gross Unrealized Loss	252	277
Asset Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	7,859	4,849
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Gross Unrealized Loss	254	40
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	7,859	4,849
Temporarily-impaired available-for-sale investment securities, Total, Gross Unrealized Loss	254	40
U. S. Treasury Notes
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value		20,025
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Gross Unrealized Loss		6
Temporarily-impaired available-for-sale investment securities, Total, Fair Value		20,025
Temporarily-impaired available-for-sale investment securities, Total, Gross Unrealized Loss		6
Municipal Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Fair Value	10,932	23,966
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Gross Unrealized Loss	71	157
Temporarily-impaired held-to-maturity investment securities, More than 12 months, Fair Value	0	0
Temporarily-impaired held-to-maturity investment securities, More than 12 months, Gross Unrealized Loss	0	0
Temporarily-impaired held-to-maturity investment securities, Fair Value	10,932	23,966
Temporarily-impaired held-to-maturity investment securities, Gross Unrealized Loss	71	157
U.S. Govt Agency - SBA Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	27,938	10,688
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Gross Unrealized Loss	204	87
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	11,904	10,095
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Gross Unrealized Loss	167	258
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	39,842	20,783
Temporarily-impaired available-for-sale investment securities, Total, Gross Unrealized Loss	371	345
U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	38,563	64,360
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Gross Unrealized Loss	194	413
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	4,079	6,584
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Gross Unrealized Loss	91	164
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	42,642	70,944
Temporarily-impaired available-for-sale investment securities, Total, Gross Unrealized Loss	$ 285	$ 577

Maturities Schedule of Securiti

Maturities Schedule of Securities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Available-for-sale, Amortized Cost
Due through one year	$ 51,864
Due after one year through five years	100,939
Due after five years through ten years	64,028
Due after ten years	38,800
Available-for-sale Securities, Amortized Cost	255,631	$ 226,634
Held-to-maturity, Amortized Cost
Due through one year	3,743
Due after one year through five years	31,557
Due after five years through ten years	7,969
Held-to-maturity Securities, Amortized Cost	43,269	47,147
Available-for-sale Securities and Held-to-maturity Securities, Amortized Cost	298,900	273,781
Available-for-sale, Fair Value
Due through one year	52,087
Due after one year through five years	101,176
Due after five years through ten years	63,949
Due after ten years	38,873
Total available-for-sale	256,085	226,962
Held-to-maturity, Fair Value
Due through one year	3,747
Due after one year through five years	31,646
Due after five years through ten years	8,029
Total held-to-maturity	43,422	47,159
Total investment securities	$ 299,507	$ 274,121
Available-for-sale, Weighted Average Yield
Due through one year	1.22%
Due after one year through five years	1.50%
Due after five years through ten years	1.85%
Due after ten years	2.45%
Total available-for-sale	1.67%
Held-to-maturity, Weighted Average Yield
Due through one year	2.04%
Due after one year through five years	1.52%
Due after five years through ten years	1.94%
Total held-to-maturity	1.65%
Total investment securities	1.67%

Composition of Loan Portfolio (

Composition of Loan Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial Loans:	$ 556,462	$ 528,517
Loans Secured by Real Estate:
Loans Secured by Real Estate	1,177,244	1,067,847
Other Loans:	37,641	28,359
Total Loans	1,771,347	1,624,723
Owner-Occupied Nonresidential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	376,579	339,309
Other Nonresidential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	515,402	481,517
Construction, Land Development and Other Land
Loans Secured by Real Estate:
Loans Secured by Real Estate	94,353	72,223
Total Loans	94,353	72,223
1-4 Family Residential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	125,635	121,985
Multifamily Residential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	$ 65,275	$ 52,813

Company's Loan Portfolio Strati

Company's Loan Portfolio Stratified by Industry Concentration of Borrower (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Loans Receivable [Line Items]
Total Loans	$ 1,771,347	$ 1,624,723
Real Estate
Loans Receivable [Line Items]
Total Loans	811,868	744,663
Manufacturing
Loans Receivable [Line Items]
Total Loans	167,152	161,233
Wholesale
Loans Receivable [Line Items]
Total Loans	129,952	124,336
Construction
Loans Receivable [Line Items]
Total Loans	154,085	113,763
Finance
Loans Receivable [Line Items]
Total Loans	113,956	96,074
Hotel/Lodging
Loans Receivable [Line Items]
Total Loans	101,239	88,269
Professional Services
Loans Receivable [Line Items]
Total Loans	53,147	64,215
Other Services
Loans Receivable [Line Items]
Total Loans	47,041	45,781
Healthcare
Loans Receivable [Line Items]
Total Loans	47,359	43,917
Retail
Loans Receivable [Line Items]
Total Loans	36,777	35,503
Administrative Management
Loans Receivable [Line Items]
Total Loans	26,164	28,016
Restaurant/Food Service
Loans Receivable [Line Items]
Total Loans	31,884	24,525
Transportation
Loans Receivable [Line Items]
Total Loans	21,596	18,158
Information
Loans Receivable [Line Items]
Total Loans	8,756	15,457
Education
Loans Receivable [Line Items]
Total Loans	9,192	10,253
Entertainment
Loans Receivable [Line Items]
Total Loans	5,610	8,284
Other
Loans Receivable [Line Items]
Total Loans	$ 5,569	$ 2,276

Loans - Additional Information

Loans - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)Loan	Sep. 30, 2014USD ($)Loan	Sep. 30, 2015USD ($)Loan	Sep. 30, 2014USD ($)Loan	Dec. 31, 2014USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 0		$ 0
Unfunded loan commitments	765,000,000		765,000,000		$ 720,000,000
Allowance for losses on unfunded loan commitments	561,000		561,000		471,000
Credit purchase impaired loan			3,000,000		2,000,000
Recorded Investment	3,545,000		3,545,000		2,651,000
Unpaid Principal Balance	$ 5,213,000		$ 5,213,000		2,894,000
Interest Income Recognized				$ 34,000
Loans modified or restructured | Loan	3	0	3	1
Payment defaults subsequent to modification on troubled debt restructured loans			$ 0	$ 0
PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 1,916,000		1,916,000		2,385,000
Unpaid Principal Balance	2,972,000		2,972,000		4,285,000
Troubled Debt Restructuring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	1,879,000		1,879,000		644,000
Unpaid Principal Balance	$ 2,490,000		$ 2,490,000		834,000
Number of Loans | Loan	3		3	1
Interest Income Recognized			$ 0		$ 0
Troubled Debt Restructuring | PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 161,000		161,000
Unpaid Principal Balance	344,000		$ 344,000
Number of Loans | Loan			2
Interest Income Recognized	0	$ 0	$ 0	$ 0
SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	1,000,000		1,000,000
Loan balances sold	77,000,000		77,000,000
SBA Servicing Asset | PC Bancorp
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	109,000,000		109,000,000
SBA 7a Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	2,000,000		2,000,000
Debt Instrument Remaining Loans | SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	32,000,000		32,000,000
Debt Instrument Un-guaranteed Loans | SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	25,000,000		25,000,000
Debt Instrument Guaranteed Loans | SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	$ 7,000,000		$ 7,000,000

Summary of Activity for Allowan

Summary of Activity for Allowance for Loan Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Receivables [Abstract]
Allowance for loan loss at beginning of period	$ 14,124	$ 11,284	$ 12,610	$ 10,603	$ 10,603
Provision for loan losses	705	35	2,831	518
Net (charge-offs) recoveries:
Charge-offs	(42)	(8)	(933)	(165)
Recoveries	178	37	457	392
Net (charge-offs) recoveries	136	29	(476)	227
Allowance for loan loss at end of period	$ 14,965	$ 11,348	$ 14,965	$ 11,348	$ 12,610
Net (charge-offs) recoveries to average loans	0.01%	0.00%	(0.03%)	(0.02%)
Allowance for loan loss to total loans	0.84%		0.84%		0.78%
Allowance for loan loss to total loans accounted for at historical cost, which excludes loans and the related allowance for loans acquired through acquisition			1.30%		1.39%

Changes in Allowance for Loan L

Changes in Allowance for Loan Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	$ 14,124	$ 11,284	$ 12,610	$ 10,603
Provision for loan losses	705	35	2,831	518
Net (charge-offs) recoveries:
Charge-offs	(42)	(8)	(933)	(165)
Recoveries	178	37	457	392
Net (charge-offs) recoveries	136	29	(476)	227
Allowance for loan loss at end of period	14,965	11,348	14,965	11,348
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	6,244	5,385	5,864	5,534
Provision for loan losses	181	333	1,176	25
Net (charge-offs) recoveries:
Charge-offs			(891)	(93)
Recoveries	177	36	453	288
Net (charge-offs) recoveries	177	36	(438)	195
Allowance for loan loss at end of period	6,602	5,754	6,602	5,754
Construction, Land Development and Other Land
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	1,607	1,422	1,684	1,120
Provision for loan losses	371	(205)	294	97
Net (charge-offs) recoveries:
Allowance for loan loss at end of period	1,978	1,217	1,978	1,217
Commercial and Other Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	5,799	4,426	4,802	3,886
Provision for loan losses	143	(429)	1,137	72
Net (charge-offs) recoveries:
Charge-offs	(42)	(8)	(42)	(72)
Recoveries	1	1	4	104
Net (charge-offs) recoveries	(41)	(7)	(38)	32
Allowance for loan loss at end of period	5,901	3,990	5,901	3,990
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	474	51	260	63
Provision for loan losses	10	336	224	324
Net (charge-offs) recoveries:
Allowance for loan loss at end of period	$ 484	$ 387	$ 484	$ 387

Schedule Represents both Allowa

Schedule Represents both Allowance for Loan Loss and Associated Loan Balance Classified by Loan Portfolio Segment and by Credit Evaluation Methodology (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 577		$ 222
Collectively evaluated for impairment	14,388		12,388
Total Allowance for Loan Loss	14,965	$ 14,124	12,610	$ 11,348	$ 11,284	$ 10,603
Loans receivable:
Individually evaluated for impairment	3,545		2,651
Collectively evaluated for impairment	1,765,886		1,619,687
Total Loans	1,771,347		1,624,723
Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Purchased credit impaired (loans acquired with deteriorated credit quality)	0		0
Loans receivable:
Purchased credit impaired (loans acquired with deteriorated credit quality)	1,916		2,385
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	577		222
Collectively evaluated for impairment	6,025		5,642
Total Allowance for Loan Loss	6,602	6,244	5,864	5,754	5,385	5,534
Loans receivable:
Individually evaluated for impairment	3,446		1,914
Collectively evaluated for impairment	552,634		525,910
Total Loans	556,462		528,517
Commercial and Industrial | Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Purchased credit impaired (loans acquired with deteriorated credit quality)	0		0
Loans receivable:
Purchased credit impaired (loans acquired with deteriorated credit quality)	382		693
Construction, Land Development and Other Land
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,978		1,684
Total Allowance for Loan Loss	1,978	1,607	1,684	1,217	1,422	1,120
Loans receivable:
Collectively evaluated for impairment	94,353		72,223
Total Loans	94,353		72,223
Construction, Land Development and Other Land | Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Purchased credit impaired (loans acquired with deteriorated credit quality)	0		0
Commercial and Other Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	5,901		4,802
Total Allowance for Loan Loss	5,901	5,799	4,802	3,990	4,426	3,886
Loans receivable:
Individually evaluated for impairment	99		737
Collectively evaluated for impairment	1,081,258		993,195
Total Loans	1,082,891		995,624
Commercial and Other Real Estate | Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Purchased credit impaired (loans acquired with deteriorated credit quality)	0		0
Loans receivable:
Purchased credit impaired (loans acquired with deteriorated credit quality)	1,534		1,692
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	484		260
Total Allowance for Loan Loss	484	$ 474	260	$ 387	$ 51	$ 63
Loans receivable:
Collectively evaluated for impairment	37,641		28,359
Total Loans	37,641		28,359
Other | Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Purchased credit impaired (loans acquired with deteriorated credit quality)	$ 0		$ 0

Risk Category of Loans by Class

Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	$ 556,462	$ 528,517
Construction, Land Development and Other Land	94,353	72,223
Commercial and Other Real Estate	1,082,891	995,624
Other	37,641	28,359
Total Loans	1,771,347	1,624,723
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	527,311	502,624
Construction, Land Development and Other Land	94,353	72,223
Commercial and Other Real Estate	1,054,807	977,525
Other	37,640	28,358
Total Loans	1,714,111	1,580,730
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	11,862	8,738
Commercial and Other Real Estate	8,103	4,878
Total Loans	19,965	13,616
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	17,289	17,155
Commercial and Other Real Estate	19,981	13,221
Other	1	1
Total Loans	$ 37,271	$ 30,377

Age Analysis of Recorded Invest

Age Analysis of Recorded Investment (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	$ 487	$ 779
Total Non-Accrual	4,304	3,909
Current	1,766,556	1,620,035
Total Loans	1,771,347	1,624,723
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	96	425
Total Non-Accrual	3,826	2,604
Current	552,540	525,488
Total Loans	556,462	528,517
Construction, Land Development and Other Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	94,353	72,223
Total Loans	94,353	72,223
Commercial and Other Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	391	354
Total Non-Accrual	478	1,305
Current	1,082,022	993,965
Total Loans	1,082,891	995,624
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	37,641	28,359
Total Loans	37,641	28,359
Loans 31 to 60 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	85	546
Loans 31 to 60 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	85	192
Loans 31 to 60 Days Past Due | Commercial and Other Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		354
Loans 61 to 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	402	233
Loans 61 to 90 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	11	$ 233
Loans 61 to 90 Days Past Due | Commercial and Other Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing	$ 391

Recorded Investment and Unpaid

Recorded Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 3,545		$ 3,545		$ 2,651
Unpaid Principal Balance	5,213		5,213		2,894
Related Allowance	577		577		222
Average Recorded Investment	3,958	$ 5,505	3,739	$ 5,775
Interest Income Recognized				34
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no specific allowance recorded	2,118		2,118		520
Recorded Investment, With a specific allowance recorded	1,328		1,328		1,394
Unpaid Principal Balance, With no specific allowance recorded	3,629		3,629		609
Unpaid Principal Balance, With a specific allowance recorded	1,479		1,479		1,546
Recorded Investment	3,446		3,446		1,914
Unpaid Principal Balance	5,108		5,108		2,155
Related Allowance	577		577		222
Average Recorded Investment, With no specific allowance recorded	2,118	1,051	1,757	1,035
Interest Income Recognized, With no specific allowance recorded				34
Average Recorded Investment, With a specific allowance recorded	1,328	1,494	1,328	1,533
Interest Income Recognized, With a specific allowance recorded	0	0	0	0
Average Recorded Investment	3,446	2,545	3,085	2,568
Interest Income Recognized				34
Commercial and Other Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no specific allowance recorded	99		99		737
Unpaid Principal Balance, With no specific allowance recorded	105		105		739
Recorded Investment	99		99		737
Unpaid Principal Balance	105		105		$ 739
Average Recorded Investment, With no specific allowance recorded	99	2,960	104	3,207
Average Recorded Investment, With a specific allowance recorded	413		550
Interest Income Recognized, With a specific allowance recorded	0	0	0	0
Average Recorded Investment	$ 512	$ 2,960	$ 654	$ 3,207

Additional Information on Impai

Additional Information on Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Receivables [Abstract]
Interest foregone on impaired loans	$ 81	$ 72	$ 238	$ 346
Cash collections applied to reduce principal balance	$ 23	$ 18	$ 186	2,889
Interest income recognized on cash collections				$ 34

Recorded Investment and Unpai56

Recorded Investment and Unpaid Principal Balances for Troubled Debt Restructured Loans (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Recorded Investment	$ 3,545		$ 2,651
Unpaid Principal Balance	5,213		2,894
Interest Income Recognized		$ 34
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,446		1,914
Unpaid Principal Balance	5,108		2,155
Interest Income Recognized		$ 34
Commercial and Other Real Estate
Financing Receivable, Modifications [Line Items]
Recorded Investment	99		737
Unpaid Principal Balance	105		739
Troubled Debt Restructuring
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,879		644
Unpaid Principal Balance	2,490		834
Interest Income Recognized	0		0
Troubled Debt Restructuring | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,780		530
Unpaid Principal Balance	2,385		719
Interest Income Recognized	0		0
Troubled Debt Restructuring | Commercial and Other Real Estate
Financing Receivable, Modifications [Line Items]
Recorded Investment	99		114
Unpaid Principal Balance	105		115
Interest Income Recognized	$ 0		$ 0

Pre and Post Modification Recor

Pre and Post Modification Recorded Investment in TDR Loans (Detail) - Troubled Debt Restructuring $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015USD ($)Loan	Sep. 30, 2015USD ($)Loan	Sep. 30, 2014USD ($)Loan
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	3	3	1
Pre- Modification Recorded Investment	$ 1,335	$ 1,335	$ 224
Post- Modification Recorded Investment	$ 1,335	$ 1,335	$ 224
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	3	3	1
Pre- Modification Recorded Investment	$ 1,335	$ 1,335	$ 224
Post- Modification Recorded Investment	$ 1,335	$ 1,335	$ 224

Accretable Yield for Loans Acqu

Accretable Yield for Loans Acquired (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Receivables [Abstract]
Balance, beginning of period	$ 18,255	$ 6,412	$ 21,402	$ 7,912
Accretion, included in interest income	(1,463)	(813)	(4,140)	(2,264)
Reclassifications (to) from non-accretable yield	(5)		(475)	(49)
Balance, end of period	$ 16,787	$ 5,599	$ 16,787	$ 5,599

Carrying Value of Purchased Cre

Carrying Value of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Outstanding [Line Items]
Unpaid Principal Balance	$ 5,213	$ 2,894
Carrying Value	3,545	2,651
PCI loans
Debt Outstanding [Line Items]
Unpaid Principal Balance	2,972	4,285
Carrying Value	1,916	2,385
PCI loans | Commercial and Industrial
Debt Outstanding [Line Items]
Unpaid Principal Balance	710	1,205
Carrying Value	382	693
PCI loans | Commercial and Other Real Estate
Debt Outstanding [Line Items]
Unpaid Principal Balance	2,262	3,018
Carrying Value	$ 1,534	1,692
PCI loans | Other
Debt Outstanding [Line Items]
Unpaid Principal Balance		$ 62

Accretable Net Discount of Purc

Accretable Net Discount of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Acquired Impaired Loans Change In Accretable Yield [Line Items]
Balance, beginning of period	$ 18,255	$ 6,412	$ 21,402	$ 7,912
Accretion, included in interest income	(1,463)	(813)	(4,140)	(2,264)
Balance, end of period	16,787	5,599	16,787	5,599
PCI loans
Acquired Impaired Loans Change In Accretable Yield [Line Items]
Balance, beginning of period	286	360	324	395
Accretion, included in interest income	(20)	(18)	(58)	(53)
Reclassifications from non-accretable yield	0	0	0	0
Balance, end of period	$ 266	$ 342	$ 266	$ 342

Qualified Affordable Housing 61

Qualified Affordable Housing Project Investments - Additional Information (Detail) - Low Income Housing Tax Credits - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Investment Holdings [Line Items]
Investment cost	$ 3,800,000		$ 4,200,000
Investment in funding obligation	1,000,000		$ 3,000,000
Tax credits and other tax benefits	436,000	$ 443,000
Amortization expense	$ 343,000	$ 348,000

Borrowings and Subordinated D62

Borrowings and Subordinated Debentures - Additional Information (Detail)	May. 19, 2010USD ($)	Sep. 30, 2015USD ($)Debentures	Jun. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Securities with a fair value		$ 49,000,000		$ 32,300,000
Subordinated debentures		$ 12,372,000
Issuance maturity period from its date of issue		30 years
Number of debentures | Debentures		3
Trust preferred securities tier one capital		25.00%
Maximum proceeds from issuance of trust preferred securities	$ 15,000,000,000
Proceeds from issuance of trust preferred securities	12,000,000
PC Bancorp
Debt Instrument [Line Items]
Subordinated debentures		$ 12,400,000
Federal Home Loan Bank of San Francisco
Debt Instrument [Line Items]
Credit facility, percentage of Bank's total assets			25.00%
Credit facility, maximum borrowing capacity			$ 618,000,000
Credit facility, loan collateral pledge		795,000,000
Credit facility borrowings collateral amount		526,000,000
Investment securities pledged with FHLB		20,000,000
Outstanding advances (borrowings) with FHLB		0		$ 0
Junior Subordinated Debt
Debt Instrument [Line Items]
Proceeds from issuance of debt securities	$ 12,400,000
Trust I
Debt Instrument [Line Items]
Subordinated debentures		6,186,000
Prepayment penalties		0
Trust II
Debt Instrument [Line Items]
Subordinated debentures		3,093,000
Prepayment penalties		0
Trust III
Debt Instrument [Line Items]
Subordinated debentures		3,093,000
Prepayment penalties		$ 0
Subordinated Debentures
Debt Instrument [Line Items]
Subordinate debentures, interest payment terms		The Company has the right, assuming no default has occurred, to defer payments of interest on the subordinated debentures at any time for a period not to exceed 20 consecutive quarters.
Minimum
Debt Instrument [Line Items]
Repurchase maturity date		1 day
Maximum
Debt Instrument [Line Items]
Repurchase maturity date		180 days

Terms and Maturity of Bank's Se

Terms and Maturity of Bank's Securities Sold under Agreements (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount	$ 16,698	$ 9,411
Interest Rate	0.22%	0.20%
December 31, 2014
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount		$ 9,411
Term		2 days
Maturity Date		Jan. 2, 2015
December 31, 2014 | Minimum
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest Rate		0.13%
December 31, 2014 | Maximum
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest Rate		0.25%
September 30, 2015
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount	$ 16,698
Term	1 day
Maturity Date	Oct. 1, 2015
September 30, 2015 | Minimum
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest Rate	0.10%
September 30, 2015 | Maximum
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest Rate	0.25%

Subordinated Debentures Outstan

Subordinated Debentures Outstanding (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount, gross	$ 12,372
Unamortized fair value adjustment	(2,715)
Net	9,657	$ 9,538
Trust I
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount, gross	$ 6,186
Issuance Date	Dec. 10, 2004
Maturity Date	Mar. 15, 2035
Rate Index	3 month LIBOR + 2.05 %
Current Rate	2.39%
Next Reset Date	Dec. 15, 2015
Trust II
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount, gross	$ 3,093
Issuance Date	Dec. 23, 2005
Maturity Date	Mar. 15, 2036
Rate Index	3 month LIBOR + 1.75 %
Current Rate	2.09%
Next Reset Date	Dec. 15, 2015
Trust III
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount, gross	$ 3,093
Issuance Date	Jun. 30, 2006
Maturity Date	Sep. 18, 2036
Rate Index	3 month LIBOR + 1.85 %
Current Rate	2.19%
Next Reset Date	Dec. 15, 2015

Derivative Financial Instrume65

Derivative Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015USD ($)AgreementDerivativeFinancial_Institution	Dec. 31, 2014USD ($)
Derivative [Line Items]
Number of pay-fixed, receive-variable interest rate swap agreements | Agreement	19
Outstanding swaps original maturity period	15 years
Certificates of deposit with other financial institutions pledged	$ 3,000,000
Investment securities	$ 299,354,000	$ 274,109,000
Interest rate swap contracts fair value
Derivative [Line Items]
Acquisition of interest rate swap contracts	Jul. 31, 2012
Investment securities	$ 2,000,000
Trading securities eligible for use as collateral	$ 5,000,000
1st Enterprise Bank
Derivative [Line Items]
Number of counterparty banks | Financial_Institution	2
Derivative assets liabilities offset	$ 0
Total notional amount of swaps	$ 35,000,000	$ 36,000,000
Acquisition of interest rate swap contracts	Nov. 30, 2014
Derivatives not Designated as Hedging Instruments | 1st Enterprise Bank | Interest rate swap contracts fair value
Derivative [Line Items]
Swap contracts acquired | Derivative	13
Offsetting interest-rate swaps acquired | Derivative	13

Balance Sheet Classification of

Balance Sheet Classification of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Asset Derivatives	$ 1,298	$ 719
Liability Derivatives	3,386	3,515
PC Bancorp | Accrued Interest Payable and Other Liabilities
Derivative [Line Items]
Liability Derivatives	2,088	2,796
PC Bancorp | Accrued Interest Payable and Other Liabilities | Interest Rate Contracts
Derivative [Line Items]
Liability Derivatives	26,226	29,289
1st Enterprise Bank | Accrued Interest Receivable and Other Assets | Interest rate swap contracts fair value
Derivative [Line Items]
Asset Derivatives	1,298	719
1st Enterprise Bank | Accrued Interest Payable and Other Liabilities | Interest rate swap contracts fair value
Derivative [Line Items]
Liability Derivatives	1,298	719
Derivatives not Designated as Hedging Instruments | PC Bancorp | Accrued Interest Payable and Other Liabilities | Interest rate swap contracts fair value
Derivative [Line Items]
Liability Derivatives	394	519
Derivatives Designated as Hedging Instruments | PC Bancorp | Accrued Interest Payable and Other Liabilities | Interest rate swap contracts fair value
Derivative [Line Items]
Liability Derivatives	$ 1,694	$ 2,277

Effect of All Derivative Instru

Effect of All Derivative Instruments on Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Net increase (decrease) in other non-interest income	$ (25)	$ 17	$ (74)	$ (26)
Net increase (decrease) in interest income on loans	58	(60)	16	(152)
Derivatives not Designated as Hedging Instruments | Loans, net
Derivative [Line Items]
Increase in fair value of interest rate swap contracts	41	86	124	179
Payments on interest rate swap contracts on loans	(66)	(69)	(198)	(205)
Derivatives not Designated as Hedging Instruments | Subordinated debentures
Derivative [Line Items]
Increase in fair value of interest rate swap contracts	142	361	583	663
Derivatives Designated as Hedging Instruments | Loans, net
Derivative [Line Items]
Increase (decrease) in fair value of hedged loans	191	(104)	279	135
Payments on interest rate swap contracts on loans	$ (275)	$ (317)	$ (846)	$ (950)

Securities Sold under Repurchas

Securities Sold under Repurchase Agreements and Derivatives Securities Offset in Consolidated Financial Statements Due to an Enforceable Master Netting Arrangement (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Offsetting [Abstract]
Interest rate swap contracts fair value - Gross Amounts Recognized in the Consolidated Balance Sheets	$ 1,298	$ 719
Interest rate swap contracts fair value - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Interest rate swap contracts fair value - Net Amounts of Assets Presented in the Consolidated Balance Sheets	1,298	719
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	1,298	719
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	0	0
Interest rate swap contracts fair value - Net Amount (Collateral over liability balance required to be pledged)	0	0
Total - Gross Amounts Recognized in the Consolidated Balance Sheets	1,298	719
Total - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Total - Net Amounts of Assets Presented in the Consolidated Balance Sheets	1,298	719
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	1,298	719
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	0	0
Total - Net Amount (Collateral over liability balance required to be pledged)	0	0
Interest rate swap contracts fair value - Gross Amounts Recognized in the Consolidated Balance Sheets	3,386	3,515
Interest rate swap contracts fair value - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Interest rate swap contracts fair value - Net Amounts of Assets Presented in the Consolidated Balance Sheets	3,386	3,515
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	3,386	3,515
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	4,306	4,150
Interest rate swap contracts fair value - Net Amount (Collateral over liability balance required to be pledged)	920	635
Securities sold under agreements to repurchase - Gross Amounts Recognized in the Consolidated Balance Sheets	16,698	9,411
Securities sold under agreements to repurchase - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Securities sold under agreements to repurchase - Net Amounts of Assets Presented in the Consolidated Balance Sheets	16,698	9,411
Securities sold under agreements to repurchase - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	16,698	9,411
Securities sold under agreements to repurchase - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	49,139	32,304
Securities sold under agreements to repurchase - Net Amount (Collateral over liability balance required to be pledged)	32,441	22,893
Total - Gross Amounts Recognized in the Consolidated Balance Sheets	20,084	12,926
Total - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Total - Net Amounts of Assets Presented in the Consolidated Balance Sheets	20,084	12,926
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	20,084	12,926
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	53,445	36,454
Total - Net Amount (Collateral over liability balance required to be pledged)	$ 33,361	$ 23,528

Future Compensation Expense Rel

Future Compensation Expense Related to Unvested Restricted Stock Grants (Detail) - Equity Plan - Restricted Stock $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remainder of 2015	$ 676
2,016	1,879
2,017	760
2,018	273
2,019	31
Thereafter	0
Total	$ 3,619

Stock Options and Restricted 70

Stock Options and Restricted Stock - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, option Granted			0		0	0	0
Stock based compensation expense	$ 0	$ 2,000	$ 1,700	$ 8,000
Total intrinsic value of options exercised	2,000,000	1,000,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Future compensation expense related to stock options			0
Stock-based compensation expense	$ 745,000	$ 443,000	2,000,000	$ 1,000,000
Restricted Stock | Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Future compensation expense related to stock options			$ 3,619,000
Share based compensation, option Granted	40,000		40,000

Share Option Activity (Detail)

Share Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Shares
Exercised, Shares	(158,315)
Equity Plan | Stock Options
Shares
Outstanding stock options at beginning, Shares	1,016,490
Granted, Shares	0
Exercised, Shares	(158,315)
Forfeited, Shares	(5,000)
Expired, Shares	0
Outstanding stock options at ending, Shares	853,175	1,016,490
Exercisable options at September 30, 2015, Shares	853,175
Unvested options at September 30, 2015, Shares	0
Weighted Average Exercise Price
Outstanding stock options at beginning, Weighted Average Exercise Price	$ 10.13
Granted, Weighted Average Exercise Price	0
Exercised, Weighted Average Exercise Price	0
Forfeited, Weighted Average Exercise Price	0
Expired, Weighted Average Exercise Price	0
Outstanding stock options at end, Weighted Average Exercise Price	10.26	$ 10.13
Exercisable options at end, Weighted Average Exercise Price	10.26
Unvested options at end, Weighted Average Exercise Price	$ 0
Weighted Average Remaining Contractual Term
Outstanding stock options, Weighted Average Remaining Contractual Term		1 year 7 months 6 days
Exercisable options at end, Weighted Average Remaining Contractual Term	10 months 24 days
Unvested options at end, Weighted Average Remaining Contractual Term	10 months 24 days
Aggregate Intrinsic Value
Outstanding stock options at beginning, Aggregate Intrinsic Value	$ 11,770
Outstanding stock options at end, Aggregate Intrinsic Value	10,467	$ 11,770
Exercisable options at end, Aggregate Intrinsic Value	10,467
Unvested options at end, Aggregate Intrinsic Value	$ 0

Restricted Stock Activity (Deta

Restricted Stock Activity (Detail) - Restricted Stock	9 Months Ended
	Sep. 30, 2015$ / sharesshares
Number of Shares
Unvested, at beginning, Number of Shares	309,506
Granted, Number of Shares	77,800
Vested, Number of Shares	(99,750)
Cancelled and forfeited, Number of Shares	(9,175)
Unvested, at end, Number of Shares	278,381
Weighted-Average Grant-Date Fair Value per Share
Unvested, at beginning, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 16.41
Granted, Weighted-Average Grant-Date Fair Value per Share | $ / shares	20.95
Vested, Weighted-Average Grant-Date Fair Value per Share | $ / shares	13.42
Cancelled and forfeited, Weighted-Average Grant-Date Fair Value per Share | $ / shares	16.50
Unvested, at end, Weighted-Average Grant-Date Fair Value per Share | $ / shares	$ 18.74

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	Nov. 30, 2014	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Issued common stock increased		187,080
Common stock, shares issued		16,870,936	16,870,936	16,683,856
Shares issued during period upon exercise of stock options		158,315
Total exercise value of employee stock options		$ 1,434,000
Share based compensation, restricted shares issued		68,625
Share based compensation, unvested restricted shares cancelled		39,860
Preferred stock, liquidation preference per share	$ 1,000
Carrying value of preferred stock		$ 16,739,000	$ 16,739,000	$ 16,004,000
1st Enterprise Bank
Class of Stock [Line Items]
Number of Non-Cumulative Perpetual Preferred Stock, Series D converted to Non-Cumulative Perpetual Preferred Stock, Series A	16,400
Preferred stock estimated period		4 years
Preferred stock net discount		$ 479,000
Preferred stock accretion on net discount		818,000	735,000
Carrying value of preferred stock		16,700,000	16,700,000
Preferred stock value, gross		16,400,000	$ 16,400,000
Preferred stock value net premium		$ 300,000
1st Enterprise Bank | Preferred Stock
Class of Stock [Line Items]
Fair value of preferred stock	$ 15,900,000
1st Enterprise Bank | SBLF
Class of Stock [Line Items]
Preferred stock issued	16,400
Restricted Stock
Class of Stock [Line Items]
Number of shares granted		77,800
Share based compensation, unvested restricted shares cancelled		9,175
Restricted Stock | Directors And Employees
Class of Stock [Line Items]
Number of shares granted		77,800
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Share based compensation, unvested restricted shares cancelled		9,175
Share based compensation, restricted shares value		$ 856,000

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net unrealized gains (losses) on investment securities: Before Tax
Beginning balance	$ (82)	$ 331	$ 333	$ (348)
Net unrealized gains arising during the period	536	19	121	698
Ending balance	454	350	454	350
Net unrealized gains (losses) on investment securities: Tax Effect
Beginning balance	(34)	136	143	(143)
Net unrealized gains arising during the period	225	11	48	290
Ending balance	191	147	191	147
Net unrealized gains (losses) on investment securities: Net of Tax
Beginning balance	(48)	195	190	(205)
Net unrealized gains arising during the period	311	8	73	408
Ending balance	$ 263	$ 203	$ 263	$ 203

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Other Commitments [Line Items]
Legal proceedings against the company	$ 0
Commitments to Extend Credit
Other Commitments [Line Items]
Financial instruments with off balance sheet risk	765,000,000	$ 720,000,000
Commitments to Extend Credit | Standby Letters of Credit
Other Commitments [Line Items]
Financial instruments with off balance sheet risk	$ 70,000,000	$ 57,000,000

Financial Assets and Financial

Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	$ 256,085	$ 226,962
Interest Rate Swap Contracts	1,298	719
Interest Rate Swap Contracts	3,386	3,515
Interest rate swap contracts fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Contracts	1,298	719
Interest Rate Swap Contracts	3,386	3,515
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	256,085	226,962
Significant Other Observable Inputs (Level 2) | Interest rate swap contracts fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Contracts	1,298	719
Interest Rate Swap Contracts	$ 3,386	$ 3,515

Fair Value of Assets and Liab77

Fair Value of Assets and Liabilities - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets measured at fair value on recurring basis	$ 0		$ 0		$ 0
Financial liabilities measured at fair value on recurring basis	0		0		$ 0
Fair Value Hierarchy for Assets Measured on Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfer of assets in or out of Level 3	0	$ 0	0	$ 0
Fair value assets transfer from level 1 to level 2	0	0	0	0
Fair value assets transfer from level 2 to level 1	0	$ 0	0	$ 0
Fair Value Hierarchy for Asset Measured on Non-recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assets transfer from level 1 to level 2	0		0
Fair value assets transfer from level 2 to level 1	0		0
Transfer of assets in or out of Level 3	$ 0		$ 0

Balances of Assets and Liabilit

Balances of Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	$ 2,043	$ 2,022
Fair Value Hierarchy for Asset Measured on Non-recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans)	751	1,172
Other real estate owned	1,292	850
Total	2,043	2,022
Significant Unobservable Inputs (Level 3) | Fair Value Hierarchy for Asset Measured on Non-recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans)	751	1,172
Other real estate owned	1,292	850
Total	$ 2,043	$ 2,022

Significant Unobservable Inputs

Significant Unobservable Inputs Used in Fair Value Measurements for Level 3 Assets and Liabilities Measured at Fair Value on Recurring or Non-Recurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 2,043	$ 2,022
Collateral Dependent Impaired Loans With Specific Valuation Allowance And Or Partial Charge-Off
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Valuation Model and/or Factors	Estimated selling costs
Estimated selling costs	16.00%	15.00%
Collateral Dependent Impaired Loans With Specific Valuation Allowance And Or Partial Charge-Off | Credit Loss Estimate of Aged Accounts Receivable Collateral
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 751	$ 1,172
Valuation Model and/or Factors	Credit loss factors on aging of accounts receivable collateral
Collateral Dependent Impaired Loans With Specific Valuation Allowance And Or Partial Charge-Off | Credit Loss Estimate of Aged Accounts Receivable Collateral | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Credit loss factors on aging of accounts receivable collateral	20.00%	10.00%
Collateral Dependent Impaired Loans With Specific Valuation Allowance And Or Partial Charge-Off | Credit Loss Estimate of Aged Accounts Receivable Collateral | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Credit loss factors on aging of accounts receivable collateral	80.00%	80.00%
Collateral Dependent Impaired Loans With Specific Valuation Allowance And Or Partial Charge-Off | Commercial real estate appraisal; Executed sale contract
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Estimated selling costs	6.00%
Other Real Estate Owned | Commercial real estate appraisal; Executed sale contract
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 1,292
Valuation Model and/or Factors	Sales approach and Estimated selling costs
Other Real Estate Owned | Residential Real Estate Appraisal
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value		$ 850
Valuation Model and/or Factors	Sales approach and Estimated selling costs
Estimated selling costs		6.00%

Level in Fair Value Hierarchy f

Level in Fair Value Hierarchy for Financial Instruments Estimated Fair Values (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	$ 256,085	$ 226,962
Investment securities held-to-maturity	43,422	47,159
Loans, net, Carrying Amount	1,756,382	1,612,113
Loans, net, Fair Value	1,797,338	1,627,717
Interest rate swap contracts, Carrying Amount	1,298	719
Interest rate swap contracts, Fair Value	1,298	719
Certificates of deposit, Carrying Amount	62,320	64,840
Certificates of deposit, Fair Value	62,320	64,857
Securities sold under agreements to repurchase, Carrying Amount	16,698	9,411
Securities sold under agreements to repurchase, Fair Value	16,698	9,411
Subordinated debentures, Carrying Amount	9,657	9,538
Subordinated debentures, Fair Value	12,372	12,372
Interest rate swap contracts, Carrying Amount	3,386	3,515
Interest rate swap contracts, Fair Value	3,386	3,515
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	256,085	226,962
Investment securities held-to-maturity, Carrying Amount	43,269	47,147
Loans, net, Carrying Amount	1,756,382	1,612,113
Interest rate swap contracts, Carrying Amount	1,298	719
Certificates of deposit, Carrying Amount	62,320	64,840
Securities sold under agreements to repurchase, Carrying Amount	16,698	9,411
Subordinated debentures, Carrying Amount	9,657	9,538
Interest rate swap contracts, Carrying Amount	3,386	3,515
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	256,085	226,962
Investment securities held-to-maturity	43,422	47,159
Interest rate swap contracts, Fair Value	1,298	719
Certificates of deposit, Fair Value	62,320	64,857
Securities sold under agreements to repurchase, Fair Value	16,698	9,411
Subordinated debentures, Fair Value	12,372	12,372
Interest rate swap contracts, Fair Value	3,386	3,515
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net, Fair Value	$ 1,797,338	$ 1,627,717