CU Bancorp (CUNB) 10-Q 6 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 04, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
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		16,892,559

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 60,632	$ 33,996
Interest earning deposits in other financial institutions	207,448	98,590
Total Cash and Cash Equivalents	268,080	132,586
Certificates of deposit in other financial institutions	62,594	76,433
Investment securities available-for-sale, at fair value	217,481	226,962
Investment securities held-to-maturity, at amortized cost	44,014	47,147
Total investment securities	261,495	274,109
Loans	1,713,004	1,624,723
Allowance for loan loss	(14,124)	(12,610)
Net loans	1,698,880	1,612,113
Premises and equipment, net	5,190	5,377
Deferred tax assets, net	16,241	16,504
Other real estate owned, net	850	850
Goodwill	63,950	63,950
Core deposit and leasehold right intangibles	8,608	9,547
Bank owned life insurance	49,345	38,732
Accrued interest receivable and other assets	35,580	34,916
Total Assets	2,470,813	2,265,117
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing demand deposits	1,134,724	1,032,634
Interest bearing transaction accounts	251,999	206,544
Money market and savings deposits	691,219	643,675
Certificates of deposit	59,576	64,840
Total deposits	2,137,518	1,947,693
Securities sold under agreements to repurchase	14,424	9,411
Subordinated debentures, net	9,618	9,538
Accrued interest payable and other liabilities	18,647	19,283
Total Liabilities	$ 2,180,207	$ 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 June 30, 2015 and December 31, 2014, respectively	$ 16,487	$ 16,004
Common stock - authorized, 75,000,000 shares no par value, 16,840,859 shares issued and 16,880,859 shares outstanding at June 30, 2015, and 16,683,856 shares issued and outstanding at December 31, 2014	227,409	226,389
Additional paid-in capital	21,015	19,748
Retained earnings	25,743	16,861
Accumulated other comprehensive income (loss)	(48)	190
Total Shareholders' Equity	290,606	279,192
Total Liabilities and Shareholders' Equity	$ 2,470,813	$ 2,265,117

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 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	$ 0	$ 0
Common stock, shares issued	16,840,859	16,683,856
Common stock, shares outstanding	16,880,859	16,683,856
Series A Preferred Stock
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest Income
Interest and fees on loans	$ 20,644	$ 12,366	$ 40,550	$ 24,290
Interest on investment securities	1,051	467	2,231	968
Interest on interest bearing deposits in other financial institutions	246	206	448	417
Total Interest Income	21,941	13,039	43,229	25,675
Interest Expense
Interest on interest bearing transaction accounts	98	66	198	124
Interest on money market and savings deposits	408	222	791	456
Interest on certificates of deposit	46	55	97	111
Interest on securities sold under agreements to repurchase	7	11	12	19
Interest on subordinated debentures	109	107	216	214
Total Interest Expense	668	461	1,314	924
Net Interest Income	21,273	12,578	41,915	24,751
Provision for loan losses	683	408	2,126	483
Net Interest Income After Provision For Loan Losses	20,590	12,170	39,789	24,268
Non-Interest Income
Gain on sale of SBA loans, net	215	167	638	605
Deposit account service charge income	1,153	630	2,294	1,260
Other non-interest income	1,727	986	2,771	1,708
Total Non-Interest Income	3,095	1,783	5,703	3,573
Non-Interest Expense
Salaries and employee benefits (includes stock based compensation expense of $807 and $479 for the three months, and $1,320 and $887 for the six months ended June 30, 2015 and 2014, respectively)	9,280	5,807	18,431	11,820
Occupancy	1,415	985	2,835	1,971
Data processing	635	476	1,276	951
Legal and professional	656	411	1,502	934
FDIC deposit assessment	351	180	684	401
Merger expenses	112	497	352	497
OREO expenses	20	6	26	6
Office services expenses	407	238	821	502
Other operating expenses	2,036	1,098	3,898	2,165
Total Non-Interest Expense	14,912	9,698	29,825	19,247
Net Income Before Provision for Income Tax Expense	8,773	4,255	15,667	8,594
Provision for income tax expense	3,506	1,869	6,201	3,542
Net Income	5,267	2,386	9,466	5,052
Preferred stock dividends and discount accretion	312		584
Net Income available to common shareholders	$ 4,955	$ 2,386	$ 8,882	$ 5,052
Earnings Per Share
Basic earnings per share	$ 0.30	$ 0.22	$ 0.54	$ 0.46
Diluted earnings per share	$ 0.29	$ 0.21	$ 0.53	$ 0.45

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Stock based compensation expense	$ 807	$ 479	$ 1,320	$ 887

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 5,267	$ 2,386	$ 9,466	$ 5,052
Other Comprehensive Income, net of tax:
Net unrealized (losses) gains on investment securities arising during the period	(749)	242	(238)	400
Other Comprehensive Income (Loss)	(749)	242	(238)	400
Comprehensive Income	$ 4,518	$ 2,628	$ 9,228	$ 5,452

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity (Unaudited) - 6 months ended Jun. 30, 2015 - USD ($)	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 (Loss)
Beginning Balance (in shares) at Dec. 31, 2014			16,400	16,683,856
Beginning Balance at Dec. 31, 2014	$ 279,192,000		$ 16,004,000	$ 226,389,000		$ 19,748,000		$ 16,861,000	$ 190,000
Net Issuance of restricted stock	68,875			68,875
Exercise of stock options (in shares)	112,115			112,115
Exercise of stock options	$ 1,020,000			$ 1,020,000
Stock based compensation expense related to employee stock options and restricted stock	1,320,000					1,320,000
Restricted stock repurchase		$ (504,000)					$ (504,000)
Restricted stock repurchase (in shares)					(23,987)
Excess tax benefit - stock based compensation	451,000					451,000
Preferred stock dividends and discount accretion	(101,000)		$ 483,000					(584,000)
Net Income	9,466,000							9,466,000
Other Comprehensive Loss	(238,000)								(238,000)
Ending Balance (in shares) at Jun. 30, 2015			16,400	16,840,859
Ending Balance at Jun. 30, 2015	$ 290,606,000		$ 16,487,000	$ 227,409,000		$ 21,015,000		$ 25,743,000	$ (48,000)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income:	$ 9,466	$ 5,052
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,126	483
Provision for unfunded loan commitments	87	73
Stock based compensation expense	1,320	887
Depreciation	702	479
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	(4,121)	(2,690)
Net amortization from investment securities	1,536	779
Increase in bank owned life insurance	(613)	(307)
Amortization of core deposit intangibles	842	138
Amortization of time deposit premium	(10)	(13)
Net amortization of leasehold right intangible asset and liabilities	7	151
Accretion of subordinated debenture discount	80	80
Gain on sale of SBA loans, net	(638)	(605)
Decrease in deferred tax assets	435	538
(Increase) decrease in accrued interest receivable and other assets	(664)	2,009
Decrease in accrued interest payable and other liabilities	(395)	(125)
Net excess in tax benefit on stock compensation	(451)	(332)
Increase (decrease) in fair value of derivative swap liability	213	(394)
Net cash provided by operating activities	9,922	6,203
Cash flows from investing activities:
Purchases of available-for-sale investment securities	(9,112)	(6,215)
Proceeds from repayment and maturities from investment securities	19,780	10,460
Loans originated, net of principal payments	(84,134)	(43,422)
Purchases of premises and equipment	(515)	(733)
Net decrease (increase) in certificates of deposit in other financial institutions	13,839	(4,270)
Purchase of bank owned life insurance	(10,000)
Net cash (used in) investing activities	(70,142)	(44,180)
Cash flows from financing activities:
Net increase in Non-interest bearing demand deposits	102,090	50,108
Net increase (decrease) in Interest bearing transaction accounts	45,455	(12,423)
Net increase (decrease) in Money market and savings deposits	47,544	(18,979)
Net decrease in Certificates of deposit	(5,254)	(5,836)
Net increase in Securities sold under agreements to repurchase	5,013	2,711
Net proceeds from stock options exercised	1,020	1,085
Restricted stock repurchase	(504)	(242)
Dividends paid on preferred stock	(101)
Net excess in tax benefit on stock compensation	451	332
Net cash provided by financing activities	195,714	16,756
Net increase (decrease) in cash and cash equivalents	135,494	(21,221)
Cash and cash equivalents, beginning of period	132,586	241,287
Cash and cash equivalents, end of period	268,080	220,066
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	1,348	849
Cash paid during the period for taxes	4,060	750
Supplemental disclosures of non-cash investing activities:
Net increase (decrease) in unrealized gain or loss on investment securities, net of tax	(238)	400
Loans transferred to other real estate owned	$ 850	$ 219

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	6 Months Ended
	Jun. 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 balance sheets and consolidated statements of income 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 ASC 810 Consolidation. For more detail, see Note 9 – Borrowings and Subordinated Debentures. 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 period 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 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	6 Months Ended
	Jun. 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.In November 2014, the FASB issued 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 May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) 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.

Business Combinations

Business Combinations	6 Months Ended
	Jun. 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 the CU Bancorp common stock, resulting in 5.2 million shares of CU Bancorp common stock issued. The fair value of the 5.2 million shares of common stock issued as part of the consideration paid ($102.7 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, 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 merger offers further delivery of sophisticated personal service to their target, small and middle-market business, entrepreneurs, non-profits and professional customers. The merger provides the combined institution with financial benefits that include reduced combined operating expenses and synergies. The Company expensed approximately $112,000 of merger expenses for the three months ended June 30, 2015 and $497,000 for the three months ended June 30, 2014. For the six months ended June 30, 2015 and June 30, 2014, the Company expensed approximately $352,000 and $497,000 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 or when additional information relative to the closing date fair values becomes available and such information is considered final, whichever is earlier. 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 Accounting Standards Codification (“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 and 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	6 Months Ended
	Jun. 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 and outstanding. Tangible book value per common share was calculated by dividing tangible common equity, by the number of common shares issued and outstanding. 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): June 30, 2015 December 31, Total Shareholders’ Equity $ 290,606 $ 279,192 Less: Preferred stock 16,487 16,004 Less: Goodwill 63,950 63,950 Less: Core deposit and leasehold right intangibles 8,608 9,547 Tangible common equity $ 201,561 $ 189,691 Common shares issued 16,840,859 16,683,856 Book value per common share $ 16.28 $ 15.78 Tangible book value per common share $ 11.97 $ 11.37

Computation of Earnings per Com

Computation of Earnings per Common Share	6 Months Ended
	Jun. 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 weighted average diluted shares for the periods indicated (dollars in thousands, except share and per share data): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net Income $ 5,267 $ 2,386 $ 9,466 $ 5,052 Less: Preferred stock dividends and discount accretion 312 — 584 — Net Income available to common shareholders $ 4,955 $ 2,386 $ 8,882 $ 5,052 Weighted average basic common shares outstanding 16,481,527 10,952,087 16,445,118 10,913,227 Dilutive effect of potential common share issuances from stock options and restricted stock 442,684 206,479 441,102 213,313 Weighted average diluted common shares outstanding 16,924,211 11,158,566 16,886,220 11,126,540 Income per common share Basic $ 0.30 $ 0.22 $ 0.54 $ 0.46 Diluted $ 0.29 $ 0.21 $ 0.53 $ 0.45 Anti-dilutive shares not included in the calculation of diluted earnings per share 64,500 82,154 64,889 83,437

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Note 6 - Investment Securities The investment securities portfolio has been classified into two catergories: available-for-sale (“AFS”) and held-to-maturity (“HTM”). The following tables present the amortized cost and estimated fair values of investment securities by major category as of the dates indicated. There were no impaired securities at June 30, 2015 or December 31, 2014, and as such there were no other than temporary impairment losses in the securities portfolio for the periods indicated in the tables below (dollars in thousands): Gross Unrealized June 30, 2015 Amortized Gains Losses Fair Market Available-for-sale: U.S. Govt Agency and Sponsored Agency - Note Securities $ 1,021 $ 3 $ — $ 1,024 U.S. Govt Agency - SBA Securities 49,635 709 215 50,129 U.S. Govt Agency - GNMA Mortgage-Backed Securities 26,271 210 384 26,097 U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities 102,248 329 793 101,784 Corporate Securities 4,030 44 — 4,074 Municipal Securities 1,024 4 — 1,028 Asset Backed Securities 8,310 — 23 8,287 U.S. Treasury Notes 25,024 34 — 25,058 Total available-for-sale 217,563 1,333 1,415 217,481 Held-to-maturity: Municipal Securities 44,014 68 274 43,808 Total held-to-maturity 44,014 68 274 43,808 Total investment securities $ 261,577 $ 1,401 $ 1,689 $ 261,289 Gross Unrealized December 31, 2014 Amortized Gains Losses Fair Market 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 June 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 June 30, 2015 and December 31, 2014, securities with a market value of $137.8 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 had no securities that were classified as other-than-temporarily impaired at June 30, 2015 or December 31, 2014. The following tables represent investment securities with unrealized losses that are considered to be temporarily-impaired, summarized and classified according to the duration of the loss period as of the dates indicated (dollars in thousands). < 12 Continuous Months > 12 Continuous Total June 30, 2015 Fair Value Net Fair Net Fair Value Net Temporarily-impaired available-for-sale investment securities: U.S. Govt. Agency SBA Securities $ 595 $ 5 $ 12,040 $ 210 $ 12,635 $ 215 U.S. Govt. Agency – GNMA Mortgage-Backed Securities 9,073 109 7,660 275 16,733 384 U.S. Govt. Sponsored Agency – CMO & Mortgage-Backed Securities 72,847 635 4,099 158 76,946 793 Asset Backed Securities 8,287 23 — — 8,287 23 Total temporarily-impaired available-for-sale investment securities $ 90,802 $ 772 $ 23,799 $ 643 $ 114,601 $ 1,415 Temporarily-impaired held-to-maturity investment securities: Municipal Securities $ 33,009 $ 274 $ — $ — $ 33,009 $ 274 Total temporarily-impaired held-to-maturity investment securities $ 33,009 $ 274 $ — $ — $ 33,009 $ 274 < 12 Continuous Months > 12 Continuous Total December 31, 2014 Fair Value Net Fair Net Fair Value Net 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. The Company did not have any sales of securities during the three and six months ended June 30, 2015 and 2014. The amortized cost, estimated fair value and average yield of debt securities at June 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 • 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. June 30, 2015 Maturities Schedule of Securities Amortized Fair Value Weighted Available-for-sale: Due through one year $ 43,777 $ 43,886 1.43 % Due after one year through five years 91,700 91,667 1.61 % Due after five years through ten years 59,270 59,105 1.86 % Due after ten years 22,816 22,823 2.45 % Total available-for-sale $ 217,563 $ 217,481 1.73 % Held-to-maturity: Due through one year $ 4,690 $ 4,690 1.59 % Due after one year through five years 29,223 29,055 1.53 % Due after five years through ten years 10,101 10,063 1.87 % Total held-to-maturity $ 44,014 $ 43,808 1.61 % Total investment securities $ 261,577 $ 261,289 1.71 % 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 June 30, 2015 and $8.0 million as of December 31, 2014. 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	6 Months Ended
	Jun. 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): June 30, December 31, Commercial and Industrial Loans: $ 505,931 $ 528,517 Loans Secured by Real Estate: Owner-Occupied Nonresidential Properties 380,867 339,309 Other Nonresidential Properties 520,568 481,517 Construction, Land Development and Other Land 76,318 72,223 1-4 Family Residential Properties 136,142 121,985 Multifamily Residential Properties 54,789 52,813 Total Loans Secured by Real Estate 1,168,684 1,067,847 Other Loans: 38,389 28,359 Total Loans $ 1,713,004 $ 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): June 30, December 31, Real Estate $ 813,110 $ 744,663 Manufacturing 161,993 161,233 Wholesale 121,359 124,336 Construction 132,071 113,763 Finance 97,897 96,074 Hotel/Lodging 101,335 88,269 Professional Services 55,671 64,215 Other Services 41,439 45,781 Healthcare 47,277 43,917 Retail 37,439 35,503 Administrative Management 26,080 28,016 Restaurant/Food Service 27,808 24,525 Transportation 17,975 18,158 Information 10,126 15,457 Education 9,307 10,253 Entertainment 6,768 8,284 Other 5,349 2,276 Total $ 1,713,004 $ 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 June 30, 2015 was $105 million, of which $75 million has been sold. Of the $30 million remaining on the Company’s books, $24 million is un-guaranteed and $6 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 June 30, 2015, there were no loans classified as held for sale. At June 30, 2015, the Company does not have any unsold SBA 7a loans. 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 Six Months Ended 2015 2014 2015 2014 Allowance for loan loss at beginning of period $ 13,247 $ 10,823 $ 12,610 $ 10,603 Provision for loan losses 683 408 2,126 483 Net (charge-offs) recoveries: Charge-offs (1 ) (157 ) (891 ) (157 ) Recoveries 195 210 279 355 Net (charge-offs) recoveries 194 53 (612 ) 198 Allowance for loan loss at end of period $ 14,124 $ 11,284 $ 14,124 $ 11,284 Net (charge-offs) recoveries to average loans 0.01 % 0.00 % (0.04 )% 0.02 % June 30, December 30, Allowance for loan loss to total loans 0.82 % 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 1.33 % 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 June 30, 2015 and December 31, 2014 was $756 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 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 $558,000 and $471,000 at June 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 Construction, Other Land Commercial Other Real Estate Other Total Three Months Ended June 30, 2015 Allowance for loan loss – Beginning balance $ 5,737 $ 1,763 $ 5,439 $ 308 $ 13,247 Provision for loan losses 314 (156 ) 359 166 683 Net (charge-offs) recoveries: Charge-offs (1 ) — — — (1 ) Recoveries 194 — 1 — 195 Net recoveries 193 — 1 — 194 Ending balance $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Three Months Ended June 30, 2014 Allowance for loan loss – Beginning balance $ 5,278 $ 1,334 $ 4,161 $ 50 $ 10,823 Provision for loan losses 91 88 228 1 408 Net (charge-offs) recoveries: Charge-offs (93 ) — (64 ) — (157 ) Recoveries 109 — 101 — 210 Net recoveries 16 — 37 — 53 Ending balance $ 5,385 $ 1,422 $ 4,426 $ 51 $ 11,284 Commercial Construction, Other Land Commercial Other Real Estate Other Total Six Months Ended June 30, 2015 Allowance for loan loss – Beginning balance $ 5,864 $ 1,684 $ 4,802 $ 260 $ 12,610 Provision for loan losses 995 (77 ) 994 214 2,126 Net (charge-offs) recoveries: Charge-offs (891 ) — — — (891 ) Recoveries 276 — 3 — 279 Net (charge-offs) recoveries (615 ) — 3 — (612 ) Ending balance $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Six Months Ended June 30, 2014 Allowance for loan loss – Beginning balance $ 5,534 $ 1,120 $ 3,886 $ 63 $ 10,603 Provision for loan losses (308 ) 302 501 (12 ) 483 Net (charge-offs) recoveries: Charge-offs (93 ) — (64 ) — (157 ) Recoveries 252 — 103 — 355 Net recoveries 159 — 39 — 198 Ending balance $ 5,385 $ 1,422 $ 4,426 $ 51 $ 11,284 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 June 30, 2015 Allowance for loan loss: Individually evaluated for impairment $ 624 $ — $ 52 $ — $ 676 Collectively evaluated for impairment 5,620 1,607 5,747 474 13,448 Purchased credit impaired (loans acquired with deteriorated credit quality) — — — — — Total Allowance for Loan Loss $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Loans receivable: Individually evaluated for impairment $ 3,470 $ — $ 722 $ — $ 4,192 Collectively evaluated for impairment 502,058 76,318 1,090,110 38,389 1,706,875 Purchased credit impaired (loans acquired with deteriorated credit quality) 403 — 1,534 — 1,937 Total Loans Receivable $ 505,931 $ 76,318 $ 1,092,366 $ 38,389 $ 1,713,004 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 and Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total June 30, 2015 Pass $ 481,762 $ 76,318 $ 1,062,336 $ 38,338 $ 1,658,754 Special Mention 10,495 — 11,888 — 22,383 Substandard 13,674 — 18,142 51 31,867 Doubtful — — — — — Total $ 505,931 $ 76,318 $ 1,092,366 $ 38,389 $ 1,713,004 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 Current Total Loans June 30, 2015 Commercial and Industrial $ — $ — $ — $ — $ 3,870 $ 502,061 $ 505,931 Construction, Land Development and Other Land — — — — — 76,318 76,318 Commercial and Other Real Estate — — — — 1,112 1,091,254 1,092,366 Other — — — — — 38,389 38,389 Total $ — $ — $ — $ — $ 4,982 $ 1,708,022 $ 1,713,004 31-60 Days Past Due 61-90 Days Past Due Greater 90 Days Past Due and Total Past Due and Total Non 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 fair 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 June 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 $1.9 million and $2.4 million at June 30, 2015 and December 31, 2014, respectively. June 30, 2015 December 31, 2014 Recorded Unpaid Related Recorded Unpaid Related With no specific allowance recorded: Commercial and Industrial $ 2,053 $ 3,550 $ — $ 520 $ 609 $ — Commercial and Other Real Estate 103 107 — 737 739 — With a specific allowance recorded: Commercial and Industrial 1,417 1,569 624 1,394 1,546 222 Commercial and Other Real Estate 619 623 52 — — — Total Commercial and Industrial 3,470 5,119 624 1,914 2,155 222 Commercial and Other Real Estate 722 730 52 737 739 — Total $ 4,192 $ 5,849 $ 676 $ 2,651 $ 2,894 $ 222 Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Average Interest Average Interest Average Interest Average Interest With no specific allowance recorded: Commercial and Industrial $ 2,053 $ — $ 1,008 $ 34 $ 1,562 $ — $ 1,027 $ 34 Commercial and Other Real Estate 103 — 2,981 — 106 — 3,325 — With a specific allowance recorded: Commercial and Industrial 1,357 — 1,535 — 1,342 — 1,553 — Commercial and Other Real Estate 619 — — — 619 — — — Total: Commercial and Industrial 3,410 — 2,543 34 2,904 — 2,580 34 Commercial and Other Real Estate 722 — 2,981 — 725 — 3,325 — Total $ 4,132 $ — $ 5,524 $ 34 $ 3,629 $ — $ 5,905 $ 34 The following is a summary of additional information pertaining to impaired loans for the periods indicated (dollars in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Interest foregone on impaired loans $ 88 $ 103 $ 138 $ 274 Cash collections applied to reduce principal balance $ 19 $ 2,763 $ 19 $ 2,871 Interest income recognized on cash collections $ — $ 34 $ — $ 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 contractual 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 for the periods ending June 30, 2015 and December 31, 2014 (dollars in thousands). These tables include two TDR loans that were purchased credit impaired. As of June 30, 2015, these loans had a recorded investment of $174,000 and unpaid principal balances of $357,000. As of and for the period ended June 30, 2015 Recorded Unpaid Interest Income Recognized Commercial and Industrial $ 474 $ 678 $ — Commercial and Other Real Estate 103 107 — Total $ 577 $ 785 $ — As of and for the year ended December 31, 2014 Recorded Unpaid Interest Income Recognized Commercial and Industrial $ 530 $ 719 $ — Commercial and Other Real Estate 114 115 — Total $ 644 $ 834 $ — There was no interest income recognized for the above troubled debt restructured loans during the three months and six months ended June 30, 2015 or June 30, 2014. There were no loans modified or restructured during the three months and six months ended June 30, 2015 or June 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 six months ended June 30, 2015 or June 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 Six Months Ended 2015 2014 2015 2014 Balance, beginning of period $ 20,078 $ 7,350 $ 21,402 $ 7,912 Accretion, included in interest income (1,461 ) (889 ) (2,677 ) (1,451 ) Reclassifications to non-accretable yield (362 ) (49 ) (470 ) (49 ) Balance, end of period $ 18,255 $ 6,412 $ 18,255 $ 6,412 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 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): June 30, 2015 December 31, 2014 Unpaid Carrying Value Unpaid Carrying Value Commercial and Industrial $ 727 $ 403 $ 1,205 $ 693 Commercial and Other Real Estate 2,367 1,534 3,018 1,692 Other — — 62 — Total $ 3,094 $ 1,937 $ 4,285 $ 2,385 The following table reflects the activities in the accretable net discount for PCI loans for the period indicated (dollars in thousands): Three Months Ended Six Months Ended 2015 2014 2015 2014 Balance, beginning of period $ 305 $ 378 $ 324 $ 395 Accretion, included in interest income (19 ) (18 ) (38 ) (35 ) Reclassifications from non-accretable yield — — — — Balance, end of period $ 286 $ 360 $ 286 $ 360

Qualified Affordable Housing Pr

Qualified Affordable Housing Project Investments	6 Months Ended
	Jun. 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”) at June 30, 2015 was $3.9 million, compared to $4.1 million at December 31, 2014. The net decrease of $229,000 is the result of $1.1 million amortization of the cost of the investment offset by $0.8 million of funding during the six months ended June 30, 2015. The funding liability for the LIHTC at June 30, 2015 was $1.7 million compared to $2.5 million, at December 31, 2014. 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	6 Months Ended
	Jun. 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 $28.7 million and $32.3 million were pledged to secure the Repos at June 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): June 30, 2015 Date Issued Amount Interest Rate Original Maturity Date June 30, 2015 $ 14,424 0.13% – 0.25 % 1 day July 1, 2015 Total $ 14,424 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 $601.6 million, which represents approximately 25% of the Bank’s total assets, as reported by the Bank in its March 31, 2015 FFIEC Call Report. As of June 30, 2015, the Company had $759.3 million of loan collateral pledged with the FHLB which provides $503 million in borrowing capacity. The Company has $21.6 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 June 30, 2015 or December 31, 2014. Subordinated Debentures The following table summarizes the terms of each issuance of subordinated debentures outstanding as of June 30, 2015: Series Amount Issuance Maturity Rate Index Current Next Trust I $ 6,186 12/10/04 03/15/35 3 month LIBOR + 2.05 % 2.34 % 09/15/15 Trust II 3,093 12/23/05 03/15/36 3 month LIBOR + 1.75 % 2.04 % 09/15/15 Trust III 3,093 06/30/06 09/18/36 3 month LIBOR + 1.85 % 2.14 % 09/15/15 Subtotal 12,372 Unamortized fair value adjustment (2,754 ) Net $ 9,618 The Company had an aggregate outstanding contractual balance of $12.4 million in subordinated debentures at June 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 June 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	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 10 - Derivative Financial Instruments Derivative Financial Instruments Acquired from 1 st 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. At June 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 June 30, 2015 and December 31, 2014, the total notional amount of the Company’s swaps acquired from 1 st The following table presents the fair values of the asset of the Company’s derivative instruments acquired from 1 st Asset Derivatives June 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 738 $ 719 Balance sheet location Accrued Interest Accrued Interest The following table presents the fair values of the liability of the Company’s derivative instruments acquired from 1 st Liability Derivatives June 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 738 $ 719 Balance sheet location Accrued Interest Accrued Interest Derivative Financial Instruments Acquired from PC Bancorp At June 30, 2015, the Company also has twenty one 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. Nineteen one of the original interest rate swap contracts were re-designated as accounting hedges effective October 1, 2012. Prior to the merger with PC Bancorp, the Company did not utilize interest rate swaps to manage its interest rate risk position. 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 June 30, 2015 December 31, 2014 Fair Value Hedges Total interest rate contacts notional amount $ 28,259 $ 29,289 Derivatives not designated as hedging instruments: Interest rate swap contracts fair value $ 435 $ 519 Derivatives designated as hedging instruments: Interest rate swap contracts fair value 1,836 2,277 Total interest rate contracts fair value $ 2,271 $ 2,796 Balance sheet location Accrued Interest Payable Accrued Interest Payable The Effect of Derivative Instruments on the Consolidated Statements of Income The following table summarizes the effect of derivative financial instruments on the consolidated statements of income for the periods indicated (dollars in thousands): Three Months Ended Six Months Ended 2015 2014 2015 2014 Derivatives not designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 57 $ 32 $ 84 $ 93 Payments on interest rate swap contracts on loans (66 ) (68 ) (132 ) (136 ) Net decrease in other non-interest income (9 ) (36 ) (48 ) (43 ) Derivatives designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 356 $ 118 $ 441 $ 301 Increase (decrease) in fair value of hedged loans (73 ) 165 88 238 Payment on interest rate swap contracts on loans (285 ) (317 ) (571 ) (633 ) Net (decrease) in interest income on loans $ (2 ) $ (34 ) $ (42 ) $ (94 ) 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 June 30, 2015, the Company had $2.1 million in investment securities, $2.7 million in certificates of deposit and $1.6 million in non-interest bearing balances for a total of $6.4 million, of which $4.6 million is pledged as collateral.

Balance Sheet Offsetting

Balance Sheet Offsetting	6 Months Ended
	Jun. 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 as collateral, a certificate of deposit, cash that is maintained in a due from bank account and investment securities. 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 Amounts Not Offset in the Gross Gross Net Amounts in the Financial Collateral Net Amount June 30, 2015 Financial Assets: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 738 $ — $ 738 $ 738 $ — $ — Total $ 738 $ — $ 738 $ 738 $ — $ — Financial Liabilities: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 3,009 $ — $ 3,009 $ 3,009 $ 4,598 $ 1,589 Securities sold under agreements to repurchase (See Note 9 – Borrowings and Subordinated Debentures) 14,424 — 14,424 14,424 28,669 14,245 Total $ 17,433 $ — $ 17,433 $ 17,433 $ 33,267 $ 15,834 Gross Gross Net in the Gross Amounts Not Offset in the 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	6 Months Ended
	Jun. 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 June 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 $ 1,424 2016 1,879 2017 760 2018 273 2019 31 Thereafter — Total $ 4,367 There was no future compensation expense related to stock options as of June 30, 2015. All stock options outstanding at June 30, 2015 are vested. Stock Options There were no stock options granted by the Company in 2012, 2013, 2014, or during the six months ended June 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 (112,115 ) Forfeited (5,000 ) Expired — Outstanding stock options at June 30, 2015 899,375 $ 10.20 1.2 $ 10,761 Exercisable options at June 30, 2015 899,375 $ 10.20 1.2 $ 10,761 Unvested options at June 30, 2015 — The Company recorded stock option compensation expense of $400 and $2,000 for the three months ended June 30, 2015 and 2014, and $1,700 and $6,000 for the six months period June 30, 2015 and 2014, respectively. The total intrinsic value of options exercised during the three months ended June 30, 2015 and 2014 was $1,340,000 and $894,000, 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 117,800 20.97 Vested (50,500 ) 12.49 Cancelled and forfeited (8,925 ) 16.69 Unvested at June 30, 2015 367,881 $ 18.40 Restricted stock compensation expense related to the restricted stock grants reflected in the table above was $751,000 and $477,000 for the three month period ended June 30, 2015 and 2014 and $1,263,000 and $881,000 for the six month period ended June 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 six months ended June, 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 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 June 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	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Shareholders' Equity	Note 13 – Shareholders’ Equity Common Stock During the first and second quarters of 2015, the Company’s issued common stock increased by 157,003 shares, from 16,683,856 shares at December 31, 2014, to 16,840,859 shares at June 30, 2015. During the six months ended June 30, 2015, the Company issued 112,115 shares of stock from the exercise of employee stock options for a total value of $1,020,000. The Company also granted 77,800 shares of restricted stock awards to the Company’s directors and employees and cancelled 8,925 shares of unvested restricted stock related to employee turnover, resulting in a net issuance of restricted stock of 68,875 shares. Further, the Company cancelled 23,987 shares of restricted stock that had a value of $504,000, 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 I capital. Under Basel III, the CU Bancorp Preferred Stock continues to be included in Tier I Risk-Based Capital because non-cumulative perpetual preferred stock remained classified as Tier I 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 – June 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ 1,215 $ (514 ) $ 701 Net unrealized (losses) arising during the period (1,297 ) 548 (749 ) Ending balance $ (82 ) $ 34 $ (48 ) Before Tax Tax Effect Net of Tax Three Months Ended – June 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ (80 ) $ 33 $ (47 ) Net unrealized gains arising during the period 411 (169 ) 242 Ending balance $ 331 $ (136 ) $ 195 Before Tax Tax Effect Net of Tax Six Months Ended – June 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ 333 $ (143 ) $ 190 Net unrealized (losses) arising during the period (415 ) 177 (238 ) Ending balance $ (82 ) $ 34 $ (48 ) Before Tax Tax Effect Net of Tax Six Months Ended – June 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ (348 ) $ 143 $ (205 ) Net unrealized gains arising during the period 679 (279 ) 400 Ending balance $ 331 $ (136 ) $ 195

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 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 June 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 $756 million and $720 million at June 30, 2015 and December 31, 2014, respectively. Included in the aforementioned commitments were standby letters of credit outstanding of $76.9 million and $57.2 million at June 30, 2015 and December 31, 2014, respectively.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	6 Months Ended
	Jun. 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 (Level 1) (Level 2) (Level 3) Financial Assets – June 30, 2015 Investment securities available-for-sale $ 217,481 $ — $ 217,481 $ — Interest Rate Swap Contracts 738 — 738 — Financial Liabilities – June 30, 2015 Interest Rate Swap Contracts $ 3,009 $ — $ 3,009 $ — 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 June 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 six months ended June 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 six months ended June 30, 2015. There was one loan transferred to other real estate owned “OREO” during the quarter ending June 30, 2014 at a value of $219,000. 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 – June 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 1,360 $ — $ — $ 1,360 Other real estate owned 850 — — 850 Total $ 2,210 $ — $ — $ 2,210 Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 1,173 $ — $ — $ 1,173 Other real estate owned 850 — — 850 Total $ 2,023 $ — $ — $ 2,023 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 – June 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 793 Credit loss estimate of Credit loss factors on 20%-80% Estimated selling costs 15% 567 Commercial real estate Sales approach Estimated selling costs 8% 1,360 Other real estate owned 850 Residential real estate Sales approach Estimated selling costs 6% Total $ 2,210 Fair Value Valuation Methodology Valuation Model and/or Factors Unobservable Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 1,173 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 $ 2,023 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 June 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 (Level 3) June 30 , 2015 Financial Assets Investment securities available-for-sale $ 217,481 217,481 $ — $ 217,481 $ — Investment securities held-to-maturity 44,014 43,808 — 43,808 — Loans, net 1,698,880 1,737,061 — — 1,737,061 Interest rate swap contracts 738 738 — 738 — Financial Liabilities Certificates of deposit 59,576 59,576 — 59,576 — Securities sold under agreements to repurchase 14,424 14,424 — 14,424 — Subordinated debentures 9,618 12,372 — 12,372 — Interest rate swap contracts 3,009 3,009 — 3,009 — 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)	6 Months Ended
	Jun. 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 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)	6 Months Ended
	Jun. 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, 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)	6 Months Ended
	Jun. 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): June 30, 2015 December 31, Total Shareholders’ Equity $ 290,606 $ 279,192 Less: Preferred stock 16,487 16,004 Less: Goodwill 63,950 63,950 Less: Core deposit and leasehold right intangibles 8,608 9,547 Tangible common equity $ 201,561 $ 189,691 Common shares issued 16,840,859 16,683,856 Book value per common share $ 16.28 $ 15.78 Tangible book value per common share $ 11.97 $ 11.37

Computation of Earnings per C27

Computation of Earnings per Common Share (Tables)	6 Months Ended
	Jun. 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 weighted average diluted shares for the periods indicated (dollars in thousands, except share and per share data): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net Income $ 5,267 $ 2,386 $ 9,466 $ 5,052 Less: Preferred stock dividends and discount accretion 312 — 584 — Net Income available to common shareholders $ 4,955 $ 2,386 $ 8,882 $ 5,052 Weighted average basic common shares outstanding 16,481,527 10,952,087 16,445,118 10,913,227 Dilutive effect of potential common share issuances from stock options and restricted stock 442,684 206,479 441,102 213,313 Weighted average diluted common shares outstanding 16,924,211 11,158,566 16,886,220 11,126,540 Income per common share Basic $ 0.30 $ 0.22 $ 0.54 $ 0.46 Diluted $ 0.29 $ 0.21 $ 0.53 $ 0.45 Anti-dilutive shares not included in the calculation of diluted earnings per share 64,500 82,154 64,889 83,437

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Values of Investment Securities	The following tables present the amortized cost and estimated fair values of investment securities by major category as of the dates indicated. There were no impaired securities at June 30, 2015 or December 31, 2014, and as such there were no other than temporary impairment losses in the securities portfolio for the periods indicated in the tables below (dollars in thousands): Gross Unrealized June 30, 2015 Amortized Gains Losses Fair Market Available-for-sale: U.S. Govt Agency and Sponsored Agency - Note Securities $ 1,021 $ 3 $ — $ 1,024 U.S. Govt Agency - SBA Securities 49,635 709 215 50,129 U.S. Govt Agency - GNMA Mortgage-Backed Securities 26,271 210 384 26,097 U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities 102,248 329 793 101,784 Corporate Securities 4,030 44 — 4,074 Municipal Securities 1,024 4 — 1,028 Asset Backed Securities 8,310 — 23 8,287 U.S. Treasury Notes 25,024 34 — 25,058 Total available-for-sale 217,563 1,333 1,415 217,481 Held-to-maturity: Municipal Securities 44,014 68 274 43,808 Total held-to-maturity 44,014 68 274 43,808 Total investment securities $ 261,577 $ 1,401 $ 1,689 $ 261,289 Gross Unrealized December 31, 2014 Amortized Gains Losses Fair Market 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
Investment Securities with Unrealized Losses that are Considered to be Temporarily Impaired	The following tables represent investment securities with unrealized losses that are considered to be temporarily-impaired, summarized and classified according to the duration of the loss period as of the dates indicated (dollars in thousands). < 12 Continuous Months > 12 Continuous Total June 30, 2015 Fair Value Net Fair Net Fair Value Net Temporarily-impaired available-for-sale investment securities: U.S. Govt. Agency SBA Securities $ 595 $ 5 $ 12,040 $ 210 $ 12,635 $ 215 U.S. Govt. Agency – GNMA Mortgage-Backed Securities 9,073 109 7,660 275 16,733 384 U.S. Govt. Sponsored Agency – CMO & Mortgage-Backed Securities 72,847 635 4,099 158 76,946 793 Asset Backed Securities 8,287 23 — — 8,287 23 Total temporarily-impaired available-for-sale investment securities $ 90,802 $ 772 $ 23,799 $ 643 $ 114,601 $ 1,415 Temporarily-impaired held-to-maturity investment securities: Municipal Securities $ 33,009 $ 274 $ — $ — $ 33,009 $ 274 Total temporarily-impaired held-to-maturity investment securities $ 33,009 $ 274 $ — $ — $ 33,009 $ 274 < 12 Continuous Months > 12 Continuous Total December 31, 2014 Fair Value Net Fair Net Fair Value Net 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	June 30, 2015 Maturities Schedule of Securities Amortized Fair Value Weighted Available-for-sale: Due through one year $ 43,777 $ 43,886 1.43 % Due after one year through five years 91,700 91,667 1.61 % Due after five years through ten years 59,270 59,105 1.86 % Due after ten years 22,816 22,823 2.45 % Total available-for-sale $ 217,563 $ 217,481 1.73 % Held-to-maturity: Due through one year $ 4,690 $ 4,690 1.59 % Due after one year through five years 29,223 29,055 1.53 % Due after five years through ten years 10,101 10,063 1.87 % Total held-to-maturity $ 44,014 $ 43,808 1.61 % Total investment securities $ 261,577 $ 261,289 1.71 %

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 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): June 30, December 31, Commercial and Industrial Loans: $ 505,931 $ 528,517 Loans Secured by Real Estate: Owner-Occupied Nonresidential Properties 380,867 339,309 Other Nonresidential Properties 520,568 481,517 Construction, Land Development and Other Land 76,318 72,223 1-4 Family Residential Properties 136,142 121,985 Multifamily Residential Properties 54,789 52,813 Total Loans Secured by Real Estate 1,168,684 1,067,847 Other Loans: 38,389 28,359 Total Loans $ 1,713,004 $ 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): June 30, December 31, Real Estate $ 813,110 $ 744,663 Manufacturing 161,993 161,233 Wholesale 121,359 124,336 Construction 132,071 113,763 Finance 97,897 96,074 Hotel/Lodging 101,335 88,269 Professional Services 55,671 64,215 Other Services 41,439 45,781 Healthcare 47,277 43,917 Retail 37,439 35,503 Administrative Management 26,080 28,016 Restaurant/Food Service 27,808 24,525 Transportation 17,975 18,158 Information 10,126 15,457 Education 9,307 10,253 Entertainment 6,768 8,284 Other 5,349 2,276 Total $ 1,713,004 $ 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 Six Months Ended 2015 2014 2015 2014 Allowance for loan loss at beginning of period $ 13,247 $ 10,823 $ 12,610 $ 10,603 Provision for loan losses 683 408 2,126 483 Net (charge-offs) recoveries: Charge-offs (1 ) (157 ) (891 ) (157 ) Recoveries 195 210 279 355 Net (charge-offs) recoveries 194 53 (612 ) 198 Allowance for loan loss at end of period $ 14,124 $ 11,284 $ 14,124 $ 11,284 Net (charge-offs) recoveries to average loans 0.01 % 0.00 % (0.04 )% 0.02 % June 30, December 30, Allowance for loan loss to total loans 0.82 % 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 1.33 % 1.39 %
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, 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 Construction, Other Land Commercial Other Real Estate Other Total Three Months Ended June 30, 2015 Allowance for loan loss – Beginning balance $ 5,737 $ 1,763 $ 5,439 $ 308 $ 13,247 Provision for loan losses 314 (156 ) 359 166 683 Net (charge-offs) recoveries: Charge-offs (1 ) — — — (1 ) Recoveries 194 — 1 — 195 Net recoveries 193 — 1 — 194 Ending balance $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Three Months Ended June 30, 2014 Allowance for loan loss – Beginning balance $ 5,278 $ 1,334 $ 4,161 $ 50 $ 10,823 Provision for loan losses 91 88 228 1 408 Net (charge-offs) recoveries: Charge-offs (93 ) — (64 ) — (157 ) Recoveries 109 — 101 — 210 Net recoveries 16 — 37 — 53 Ending balance $ 5,385 $ 1,422 $ 4,426 $ 51 $ 11,284 Commercial Construction, Other Land Commercial Other Real Estate Other Total Six Months Ended June 30, 2015 Allowance for loan loss – Beginning balance $ 5,864 $ 1,684 $ 4,802 $ 260 $ 12,610 Provision for loan losses 995 (77 ) 994 214 2,126 Net (charge-offs) recoveries: Charge-offs (891 ) — — — (891 ) Recoveries 276 — 3 — 279 Net (charge-offs) recoveries (615 ) — 3 — (612 ) Ending balance $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Six Months Ended June 30, 2014 Allowance for loan loss – Beginning balance $ 5,534 $ 1,120 $ 3,886 $ 63 $ 10,603 Provision for loan losses (308 ) 302 501 (12 ) 483 Net (charge-offs) recoveries: Charge-offs (93 ) — (64 ) — (157 ) Recoveries 252 — 103 — 355 Net recoveries 159 — 39 — 198 Ending balance $ 5,385 $ 1,422 $ 4,426 $ 51 $ 11,284
Changes in Allowance for Loan Loss	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 June 30, 2015 Allowance for loan loss: Individually evaluated for impairment $ 624 $ — $ 52 $ — $ 676 Collectively evaluated for impairment 5,620 1,607 5,747 474 13,448 Purchased credit impaired (loans acquired with deteriorated credit quality) — — — — — Total Allowance for Loan Loss $ 6,244 $ 1,607 $ 5,799 $ 474 $ 14,124 Loans receivable: Individually evaluated for impairment $ 3,470 $ — $ 722 $ — $ 4,192 Collectively evaluated for impairment 502,058 76,318 1,090,110 38,389 1,706,875 Purchased credit impaired (loans acquired with deteriorated credit quality) 403 — 1,534 — 1,937 Total Loans Receivable $ 505,931 $ 76,318 $ 1,092,366 $ 38,389 $ 1,713,004 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 and Industrial Construction, Land Development and Other Land Commercial and Other Real Estate Other Total June 30, 2015 Pass $ 481,762 $ 76,318 $ 1,062,336 $ 38,338 $ 1,658,754 Special Mention 10,495 — 11,888 — 22,383 Substandard 13,674 — 18,142 51 31,867 Doubtful — — — — — Total $ 505,931 $ 76,318 $ 1,092,366 $ 38,389 $ 1,713,004 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 Current Total Loans June 30, 2015 Commercial and Industrial $ — $ — $ — $ — $ 3,870 $ 502,061 $ 505,931 Construction, Land Development and Other Land — — — — — 76,318 76,318 Commercial and Other Real Estate — — — — 1,112 1,091,254 1,092,366 Other — — — — — 38,389 38,389 Total $ — $ — $ — $ — $ 4,982 $ 1,708,022 $ 1,713,004 31-60 Days Past Due 61-90 Days Past Due Greater 90 Days Past Due and Total Past Due and Total Non 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 $1.9 million and $2.4 million at June 30, 2015 and December 31, 2014, respectively. June 30, 2015 December 31, 2014 Recorded Unpaid Related Recorded Unpaid Related With no specific allowance recorded: Commercial and Industrial $ 2,053 $ 3,550 $ — $ 520 $ 609 $ — Commercial and Other Real Estate 103 107 — 737 739 — With a specific allowance recorded: Commercial and Industrial 1,417 1,569 624 1,394 1,546 222 Commercial and Other Real Estate 619 623 52 — — — Total Commercial and Industrial 3,470 5,119 624 1,914 2,155 222 Commercial and Other Real Estate 722 730 52 737 739 — Total $ 4,192 $ 5,849 $ 676 $ 2,651 $ 2,894 $ 222 Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Average Interest Average Interest Average Interest Average Interest With no specific allowance recorded: Commercial and Industrial $ 2,053 $ — $ 1,008 $ 34 $ 1,562 $ — $ 1,027 $ 34 Commercial and Other Real Estate 103 — 2,981 — 106 — 3,325 — With a specific allowance recorded: Commercial and Industrial 1,357 — 1,535 — 1,342 — 1,553 — Commercial and Other Real Estate 619 — — — 619 — — — Total: Commercial and Industrial 3,410 — 2,543 34 2,904 — 2,580 34 Commercial and Other Real Estate 722 — 2,981 — 725 — 3,325 — Total $ 4,132 $ — $ 5,524 $ 34 $ 3,629 $ — $ 5,905 $ 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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Interest foregone on impaired loans $ 88 $ 103 $ 138 $ 274 Cash collections applied to reduce principal balance $ 19 $ 2,763 $ 19 $ 2,871 Interest income recognized on cash collections $ — $ 34 $ — $ 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 for the periods ending June 30, 2015 and December 31, 2014 (dollars in thousands). These tables include two TDR loans that were purchased credit impaired. As of June 30, 2015, these loans had a recorded investment of $174,000 and unpaid principal balances of $357,000. As of and for the period ended June 30, 2015 Recorded Unpaid Interest Income Recognized Commercial and Industrial $ 474 $ 678 $ — Commercial and Other Real Estate 103 107 — Total $ 577 $ 785 $ — As of and for the year ended December 31, 2014 Recorded Unpaid Interest Income Recognized Commercial and Industrial $ 530 $ 719 $ — Commercial and Other Real Estate 114 115 — Total $ 644 $ 834 $ —
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 Six Months Ended 2015 2014 2015 2014 Balance, beginning of period $ 20,078 $ 7,350 $ 21,402 $ 7,912 Accretion, included in interest income (1,461 ) (889 ) (2,677 ) (1,451 ) Reclassifications to non-accretable yield (362 ) (49 ) (470 ) (49 ) Balance, end of period $ 18,255 $ 6,412 $ 18,255 $ 6,412
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): June 30, 2015 December 31, 2014 Unpaid Carrying Value Unpaid Carrying Value Commercial and Industrial $ 727 $ 403 $ 1,205 $ 693 Commercial and Other Real Estate 2,367 1,534 3,018 1,692 Other — — 62 — Total $ 3,094 $ 1,937 $ 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 period indicated (dollars in thousands): Three Months Ended Six Months Ended 2015 2014 2015 2014 Balance, beginning of period $ 305 $ 378 $ 324 $ 395 Accretion, included in interest income (19 ) (18 ) (38 ) (35 ) Reclassifications from non-accretable yield — — — — Balance, end of period $ 286 $ 360 $ 286 $ 360

Borrowings and Subordinated D30

Borrowings and Subordinated Debentures (Tables)	6 Months Ended
	Jun. 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): June 30, 2015 Date Issued Amount Interest Rate Original Maturity Date June 30, 2015 $ 14,424 0.13% – 0.25 % 1 day July 1, 2015 Total $ 14,424 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 June 30, 2015: Series Amount Issuance Maturity Rate Index Current Next Trust I $ 6,186 12/10/04 03/15/35 3 month LIBOR + 2.05 % 2.34 % 09/15/15 Trust II 3,093 12/23/05 03/15/36 3 month LIBOR + 1.75 % 2.04 % 09/15/15 Trust III 3,093 06/30/06 09/18/36 3 month LIBOR + 1.85 % 2.14 % 09/15/15 Subtotal 12,372 Unamortized fair value adjustment (2,754 ) Net $ 9,618

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Effect of Derivative Instruments on Consolidated Statements of Income	The following table summarizes the effect of derivative financial instruments on the consolidated statements of income for the periods indicated (dollars in thousands): Three Months Ended Six Months Ended 2015 2014 2015 2014 Derivatives not designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 57 $ 32 $ 84 $ 93 Payments on interest rate swap contracts on loans (66 ) (68 ) (132 ) (136 ) Net decrease in other non-interest income (9 ) (36 ) (48 ) (43 ) Derivatives designated as hedging instruments: Interest rate swap contracts – loans Increase in fair value of interest rate swap contracts $ 356 $ 118 $ 441 $ 301 Increase (decrease) in fair value of hedged loans (73 ) 165 88 238 Payment on interest rate swap contracts on loans (285 ) (317 ) (571 ) (633 ) Net (decrease) in interest income on loans $ (2 ) $ (34 ) $ (42 ) $ (94 )
1st Enterprise Bank
Balance Sheet Classification of Derivative Financial Instruments	The following table presents the fair values of the asset of the Company’s derivative instruments acquired from 1 st Asset Derivatives June 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 738 $ 719 Balance sheet location Accrued Interest Accrued Interest The following table presents the fair values of the liability of the Company’s derivative instruments acquired from 1 st Liability Derivatives June 30, 2015 December 31, 2014 Interest rate swap contracts fair value $ 738 $ 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 June 30, 2015 December 31, 2014 Fair Value Hedges Total interest rate contacts notional amount $ 28,259 $ 29,289 Derivatives not designated as hedging instruments: Interest rate swap contracts fair value $ 435 $ 519 Derivatives designated as hedging instruments: Interest rate swap contracts fair value 1,836 2,277 Total interest rate contracts fair value $ 2,271 $ 2,796 Balance sheet location Accrued Interest Payable Accrued Interest Payable

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 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 Amounts Not Offset in the Gross Gross Net Amounts in the Financial Collateral Net Amount June 30, 2015 Financial Assets: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 738 $ — $ 738 $ 738 $ — $ — Total $ 738 $ — $ 738 $ 738 $ — $ — Financial Liabilities: Interest rate swap contracts fair value (See Note 10 – Derivative Financial Instruments) $ 3,009 $ — $ 3,009 $ 3,009 $ 4,598 $ 1,589 Securities sold under agreements to repurchase (See Note 9 – Borrowings and Subordinated Debentures) 14,424 — 14,424 14,424 28,669 14,245 Total $ 17,433 $ — $ 17,433 $ 17,433 $ 33,267 $ 15,834 Gross Gross Net in the Gross Amounts Not Offset in the 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)	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Future Compensation Expense Related to Unvested Restricted Stock Grants	At June 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 $ 1,424 2016 1,879 2017 760 2018 273 2019 31 Thereafter — Total $ 4,367
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 (112,115 ) Forfeited (5,000 ) Expired — Outstanding stock options at June 30, 2015 899,375 $ 10.20 1.2 $ 10,761 Exercisable options at June 30, 2015 899,375 $ 10.20 1.2 $ 10,761 Unvested options at June 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 117,800 20.97 Vested (50,500 ) 12.49 Cancelled and forfeited (8,925 ) 16.69 Unvested at June 30, 2015 367,881 $ 18.40

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 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 – June 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ 1,215 $ (514 ) $ 701 Net unrealized (losses) arising during the period (1,297 ) 548 (749 ) Ending balance $ (82 ) $ 34 $ (48 ) Before Tax Tax Effect Net of Tax Three Months Ended – June 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ (80 ) $ 33 $ (47 ) Net unrealized gains arising during the period 411 (169 ) 242 Ending balance $ 331 $ (136 ) $ 195 Before Tax Tax Effect Net of Tax Six Months Ended – June 30, 2015 Net unrealized gains (losses) on investment securities: Beginning balance $ 333 $ (143 ) $ 190 Net unrealized (losses) arising during the period (415 ) 177 (238 ) Ending balance $ (82 ) $ 34 $ (48 ) Before Tax Tax Effect Net of Tax Six Months Ended – June 30, 2014 Net unrealized gains (losses) on investment securities: Beginning balance $ (348 ) $ 143 $ (205 ) Net unrealized gains arising during the period 679 (279 ) 400 Ending balance $ 331 $ (136 ) $ 195

Fair Value of Assets and Liab35

Fair Value of Assets and Liabilities (Tables)	6 Months Ended
	Jun. 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 (Level 1) (Level 2) (Level 3) Financial Assets – June 30, 2015 Investment securities available-for-sale $ 217,481 $ — $ 217,481 $ — Interest Rate Swap Contracts 738 — 738 — Financial Liabilities – June 30, 2015 Interest Rate Swap Contracts $ 3,009 $ — $ 3,009 $ — 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 – June 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 1,360 $ — $ — $ 1,360 Other real estate owned 850 — — 850 Total $ 2,210 $ — $ — $ 2,210 Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-offs (non-purchased credit impaired loans) $ 1,173 $ — $ — $ 1,173 Other real estate owned 850 — — 850 Total $ 2,023 $ — $ — $ 2,023
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 – June 30, 2015 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 793 Credit loss estimate of Credit loss factors on 20%-80% Estimated selling costs 15% 567 Commercial real estate Sales approach Estimated selling costs 8% 1,360 Other real estate owned 850 Residential real estate Sales approach Estimated selling costs 6% Total $ 2,210 Fair Value Valuation Methodology Valuation Model and/or Factors Unobservable Financial Assets – December 31, 2014 Collateral dependent impaired loans with specific valuation allowance and/or partial charge-off $ 1,173 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 $ 2,023
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 (Level 3) June 30 , 2015 Financial Assets Investment securities available-for-sale $ 217,481 217,481 $ — $ 217,481 $ — Investment securities held-to-maturity 44,014 43,808 — 43,808 — Loans, net 1,698,880 1,737,061 — — 1,737,061 Interest rate swap contracts 738 738 — 738 — Financial Liabilities Certificates of deposit 59,576 59,576 — 59,576 — Securities sold under agreements to repurchase 14,424 14,424 — 14,424 — Subordinated debentures 9,618 12,372 — 12,372 — Interest rate swap contracts 3,009 3,009 — 3,009 — 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)	Jun. 30, 2015Office
Accounting Policies [Abstract]
Full service branch offices	10

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - USD ($)	Nov. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Merger expenses		$ 112,000	$ 497,000	$ 352,000	$ 497,000
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	5,200,000
Fair value of common stock issued as part of consideration paid	$ 102,700,000
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		$ 112,000	$ 497,000	$ 352,000	$ 497,000
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	Jun. 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:
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	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Nov. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Accretable yield	$ (18,255)	$ (20,078)	$ (21,402)		$ (6,412)	$ (7,350)	$ (7,912)
PCI loans
Business Acquisition [Line Items]
Accretable yield	$ (286)	$ (305)	$ (324)		$ (360)	$ (378)	$ (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	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Equity [Abstract]
Total Shareholders' Equity	$ 290,606	$ 279,192
Less: Preferred stock	16,487	16,004
Less: Goodwill	63,950	63,950
Less: Core deposit and leasehold right intangibles	8,608	9,547
Tangible common equity	$ 201,561	$ 189,691
Common shares issued	16,840,859	16,683,856
Book value per common share	$ 16.28	$ 15.78
Tangible book value per common share	$ 11.97	$ 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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net Income	$ 5,267	$ 2,386	$ 9,466	$ 5,052
Less: Preferred stock dividends and discount accretion	312		584
Net Income available to common shareholders	$ 4,955	$ 2,386	$ 8,882	$ 5,052
Weighted average basic common shares outstanding	16,481,527	10,952,087	16,445,118	10,913,227
Dilutive effect of potential common share issuances from stock options and restricted stock	442,684	206,479	441,102	213,313
Weighted average diluted common shares outstanding	16,924,211	11,158,566	16,886,220	11,126,540
Basic income (loss) per share	$ 0.30	$ 0.22	$ 0.54	$ 0.46
Diluted income (loss) per share	$ 0.29	$ 0.21	$ 0.53	$ 0.45
Anti-dilutive shares not included in the calculation of diluted earnings per share	64,500	82,154	64,889	83,437

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]
Impaired securities	$ 0		$ 0		$ 0
Other than temporary impairment gains or losses			0		0
Securities classified as other-than-temporarily impaired	0		0		0
Proceeds from sales of available-for-sale investment securities	0	$ 0	0	$ 0
Company's investment in the common stock of the FHLB	8,000,000		8,000,000		8,000,000
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	$ 137,800,000		$ 137,800,000		$ 148,800,000

Amortized Cost and Estimated Fa

Amortized Cost and Estimated Fair Values of Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 217,563	$ 226,634
Available-for-sale Securities, Gross Unrealized Gains	1,333	1,573
Available-for-sale Securities, Gross Unrealized Losses	1,415	1,245
Fair Market Value	217,481	226,962
Held-to-maturity Securities, Amortized Cost	44,014	47,147
Held-to-maturity Securities, Gross Unrealized Gain	68	169
Held-to-maturity Securities, Gross Unrealized Losses	274	157
Fair Market Value	43,808	47,159
Available-for-sale Securities and Held-to-maturity Securities, Amortized Cost	261,577	273,781
Available-for-sale Securities and Held-to-maturity Securities, Gross Unrealized Gain	1,401	1,742
Available-for-sale Securities and Held-to-maturity Securities, Gross Unrealized Losses	1,689	1,402
Available-for-sale Securities and Held-to-maturity Securities, Fair Market Value	261,289	274,121
Municipal Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	1,024	1,039
Available-for-sale Securities, Gross Unrealized Gains	4	11
Fair Market Value	1,028	1,050
Held-to-maturity Securities, Amortized Cost	44,014	47,147
Held-to-maturity Securities, Gross Unrealized Gain	68	169
Held-to-maturity Securities, Gross Unrealized Losses	274	157
Fair Market Value	43,808	47,159
U.S. Govt Agency - GNMA Mortgage-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	26,271	29,364
Available-for-sale Securities, Gross Unrealized Gains	210	255
Available-for-sale Securities, Gross Unrealized Losses	384	277
Fair Market Value	26,097	29,342
Corporate Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	4,030	4,043
Available-for-sale Securities, Gross Unrealized Gains	44	77
Fair Market Value	4,074	4,120
Asset Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	8,310	8,711
Available-for-sale Securities, Gross Unrealized Gains		1
Available-for-sale Securities, Gross Unrealized Losses	23	40
Fair Market Value	8,287	8,672
U. S. Treasury Notes
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	25,024	20,031
Available-for-sale Securities, Gross Unrealized Gains	34
Available-for-sale Securities, Gross Unrealized Losses		6
Fair Market Value	25,058	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	1,021	2,036
Available-for-sale Securities, Gross Unrealized Gains	3	2
Fair Market Value	1,024	2,038
U.S. Govt Agency - SBA Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	49,635	54,062
Available-for-sale Securities, Gross Unrealized Gains	709	770
Available-for-sale Securities, Gross Unrealized Losses	215	345
Fair Market Value	50,129	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	102,248	107,348
Available-for-sale Securities, Gross Unrealized Gains	329	457
Available-for-sale Securities, Gross Unrealized Losses	793	577
Fair Market Value	$ 101,784	$ 107,228

Investment Securities with Unre

Investment Securities with Unrealized Losses that are Considered to be Temporarily Impaired (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	$ 90,802	$ 112,706
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Net Unrealized Loss	772	611
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	23,799	25,463
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Net Unrealized Loss	643	634
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	114,601	138,169
Temporarily-impaired available-for-sale investment securities, Total, Net Unrealized Loss	1,415	1,245
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Fair Value	33,009	23,966
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Net Unrealized Loss	274	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, Net Unrealized Loss	0	0
Temporarily-impaired held-to-maturity investment securities, Fair Value	33,009	23,966
Temporarily-impaired held-to-maturity investment securities, Net Unrealized Loss	274	157
U.S. Govt Agency - GNMA Mortgage-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	9,073	12,784
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Net Unrealized Loss	109	65
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	7,660	8,784
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Net Unrealized Loss	275	212
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	16,733	21,568
Temporarily-impaired available-for-sale investment securities, Total, Net Unrealized Loss	384	277
Asset Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	8,287	4,849
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Net Unrealized Loss	23	40
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	8,287	4,849
Temporarily-impaired available-for-sale investment securities, Total, Net Unrealized Loss	23	40
U. S. Treasury Notes
Schedule of Available-for-sale 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, Net Unrealized Loss		6
Temporarily-impaired available-for-sale investment securities, Total, Fair Value		20,025
Temporarily-impaired available-for-sale investment securities, Total, Net Unrealized Loss		6
Municipal Securities
Schedule of Available-for-sale Securities [Line Items]
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Fair Value	33,009	23,966
Temporarily-impaired held-to-maturity investment securities, Less than 12 months, Net Unrealized Loss	274	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, Net Unrealized Loss	0	0
Temporarily-impaired held-to-maturity investment securities, Fair Value	33,009	23,966
Temporarily-impaired held-to-maturity investment securities, Net Unrealized Loss	274	157
U.S. Govt Agency - SBA Securities
Schedule of Available-for-sale Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	595	10,688
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Net Unrealized Loss	5	87
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	12,040	10,095
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Net Unrealized Loss	210	258
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	12,635	20,783
Temporarily-impaired available-for-sale investment securities, Total, Net Unrealized Loss	215	345
U.S. Govt Sponsored Agency - CMO & Mortgage-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Fair Value	72,847	64,360
Temporarily-impaired available-for-sale investment securities, Less than 12 Continuous Months, Net Unrealized Loss	635	413
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Fair Value	4,099	6,584
Temporarily-impaired available-for-sale investment securities, More than 12 Continuous Months, Net Unrealized Loss	158	164
Temporarily-impaired available-for-sale investment securities, Total, Fair Value	76,946	70,944
Temporarily-impaired available-for-sale investment securities, Total, Net Unrealized Loss	$ 793	$ 577

Maturities Schedule of Securiti

Maturities Schedule of Securities (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Available-for-sale, Amortized Cost
Due through one year	$ 43,777
Due after one year through five years	91,700
Due after five years through ten years	59,270
Due after ten years	22,816
Available-for-sale Securities, Amortized Cost	217,563	$ 226,634
Held-to-maturity, Amortized Cost
Due through one year	4,690
Due after one year through five years	29,223
Due after five years through ten years	10,101
Held-to-maturity Securities, Amortized Cost	44,014	47,147
Available-for-sale Securities and Held-to-maturity Securities, Amortized Cost	261,577	273,781
Available-for-sale, Fair Value
Due through one year	43,886
Due after one year through five years	91,667
Due after five years through ten years	59,105
Due after ten years	22,823
Total available-for-sale	217,481	226,962
Held-to-maturity, Fair Value
Due through one year	4,690
Due after one year through five years	29,055
Due after five years through ten years	10,063
Total held-to-maturity	43,808	47,159
Total investment securities	$ 261,289	$ 274,121
Available-for-sale, Weighted Average Yield
Due through one year	1.43%
Due after one year through five years	1.61%
Due after five years through ten years	1.86%
Due after ten years	2.45%
Total available-for-sale	1.73%
Held-to-maturity, Weighted Average Yield
Due through one year	1.59%
Due after one year through five years	1.53%
Due after five years through ten years	1.87%
Total held-to-maturity	1.61%
Total investment securities	1.71%

Composition of Loan Portfolio (

Composition of Loan Portfolio (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial Loans:	$ 505,931	$ 528,517
Loans Secured by Real Estate:
Loans Secured by Real Estate	1,168,684	1,067,847
Other Loans:	38,389	28,359
Total Loans	1,713,004	1,624,723
Owner-Occupied Nonresidential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	380,867	339,309
Other Nonresidential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	520,568	481,517
Construction, Land Development and Other Land
Loans Secured by Real Estate:
Loans Secured by Real Estate	76,318	72,223
Total Loans	76,318	72,223
1-4 Family Residential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	136,142	121,985
Multifamily Residential Properties
Loans Secured by Real Estate:
Loans Secured by Real Estate	$ 54,789	$ 52,813

Company's Loan Portfolio Strati

Company's Loan Portfolio Stratified by Industry Concentration of Borrower (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans Receivable [Line Items]
Total Loans	$ 1,713,004	$ 1,624,723
Real Estate
Loans Receivable [Line Items]
Total Loans	813,110	744,663
Manufacturing
Loans Receivable [Line Items]
Total Loans	161,993	161,233
Wholesale
Loans Receivable [Line Items]
Total Loans	121,359	124,336
Construction
Loans Receivable [Line Items]
Total Loans	132,071	113,763
Finance
Loans Receivable [Line Items]
Total Loans	97,897	96,074
Hotel/Lodging
Loans Receivable [Line Items]
Total Loans	101,335	88,269
Professional Services
Loans Receivable [Line Items]
Total Loans	55,671	64,215
Other Services
Loans Receivable [Line Items]
Total Loans	41,439	45,781
Healthcare
Loans Receivable [Line Items]
Total Loans	47,277	43,917
Retail
Loans Receivable [Line Items]
Total Loans	37,439	35,503
Administrative Management
Loans Receivable [Line Items]
Total Loans	26,080	28,016
Restaurant/Food Service
Loans Receivable [Line Items]
Total Loans	27,808	24,525
Transportation
Loans Receivable [Line Items]
Total Loans	17,975	18,158
Information
Loans Receivable [Line Items]
Total Loans	10,126	15,457
Education
Loans Receivable [Line Items]
Total Loans	9,307	10,253
Entertainment
Loans Receivable [Line Items]
Total Loans	6,768	8,284
Other
Loans Receivable [Line Items]
Total Loans	$ 5,349	$ 2,276

Loans - Additional Information

Loans - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015USD ($)Loan	Jun. 30, 2014USD ($)Loan	Jun. 30, 2015USD ($)Loan	Jun. 30, 2014USD ($)Loan	Dec. 31, 2014USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 0		$ 0
Unfunded loan commitments	756,000,000		756,000,000		$ 720,000,000
Allowance for losses on unfunded loan commitments	558,000		558,000		471,000
Credit purchase impaired loan			1,900,000		2,400,000
Recorded Investment	4,192,000		4,192,000		2,651,000
Unpaid Principal Balance	$ 5,849,000		$ 5,849,000		2,894,000
Interest Income Recognized		$ 34,000		$ 34,000
Loans modified or restructured | Loan	0	0	0	0
Payment defaults subsequent to modification on troubled debt restructured loans			$ 0	$ 0
Troubled Debt Restructuring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 577,000		577,000		644,000
Unpaid Principal Balance	785,000		785,000		834,000
Interest Income Recognized			0		$ 0
Troubled Debt Restructuring | PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	174,000		174,000
Unpaid Principal Balance	357,000		$ 357,000
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	75,000,000		75,000,000
SBA Servicing Asset | PC Bancorp
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	105,000,000		105,000,000
SBA 7a Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	0		0
Debt Instrument Remaining Loans | SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	30,000,000		30,000,000
Debt Instrument Un-guaranteed Loans | SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	24,000,000		24,000,000
Debt Instrument Guaranteed Loans | SBA Servicing Asset
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net	$ 6,000,000		$ 6,000,000

Summary of Activity for Allowan

Summary of Activity for Allowance for Loan Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Receivables [Abstract]
Allowance for loan loss at beginning of period	$ 13,247	$ 10,823	$ 12,610	$ 10,603	$ 10,603
Provision for loan losses	683	408	2,126	483
Net (charge-offs) recoveries:
Charge-offs	(1)	(157)	(891)	(157)
Recoveries	195	210	279	355
Net (charge-offs) recoveries	194	53	(612)	198
Allowance for loan loss at end of period	$ 14,124	$ 11,284	$ 14,124	$ 11,284	$ 12,610
Net (charge-offs) recoveries to average loans	0.01%	0.00%	(0.04%)	0.02%
Allowance for loan loss to total loans	0.82%		0.82%		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			1.33%		1.39%

Changes in Allowance for Loan L

Changes in Allowance for Loan Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	$ 13,247	$ 10,823	$ 12,610	$ 10,603
Provision for loan losses	683	408	2,126	483
Net (charge-offs) recoveries:
Charge-offs	(1)	(157)	(891)	(157)
Recoveries	195	210	279	355
Net (charge-offs) recoveries	194	53	(612)	198
Allowance for loan loss at end of period	14,124	11,284	14,124	11,284
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	5,737	5,278	5,864	5,534
Provision for loan losses	314	91	995	(308)
Net (charge-offs) recoveries:
Charge-offs	(1)	(93)	(891)	(93)
Recoveries	194	109	276	252
Net (charge-offs) recoveries	193	16	(615)	159
Allowance for loan loss at end of period	6,244	5,385	6,244	5,385
Construction, Land Development and Other Land
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	1,763	1,334	1,684	1,120
Provision for loan losses	(156)	88	(77)	302
Net (charge-offs) recoveries:
Allowance for loan loss at end of period	1,607	1,422	1,607	1,422
Commercial and Other Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	5,439	4,161	4,802	3,886
Provision for loan losses	359	228	994	501
Net (charge-offs) recoveries:
Charge-offs		(64)		(64)
Recoveries	1	101	3	103
Net (charge-offs) recoveries	1	37	3	39
Allowance for loan loss at end of period	5,799	4,426	5,799	4,426
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan loss at beginning of period	308	50	260	63
Provision for loan losses	166	1	214	(12)
Net (charge-offs) recoveries:
Allowance for loan loss at end of period	$ 474	$ 51	$ 474	$ 51

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	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 676		$ 222
Collectively evaluated for impairment	13,448		12,388
Total Allowance for Loan Loss	14,124	$ 13,247	12,610	$ 11,284	$ 10,823	$ 10,603
Loans receivable:
Individually evaluated for impairment	4,192		2,651
Collectively evaluated for impairment	1,706,875		1,619,687
Total Loans	1,713,004		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)	1,937		2,385
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	624		222
Collectively evaluated for impairment	5,620		5,642
Total Allowance for Loan Loss	6,244	5,737	5,864	5,385	5,278	5,534
Loans receivable:
Individually evaluated for impairment	3,470		1,914
Collectively evaluated for impairment	502,058		525,910
Total Loans	505,931		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)	403		693
Construction, Land Development and Other Land
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,607		1,684
Total Allowance for Loan Loss	1,607	1,763	1,684	1,422	1,334	1,120
Loans receivable:
Collectively evaluated for impairment	76,318		72,223
Total Loans	76,318		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]
Individually evaluated for impairment	52
Collectively evaluated for impairment	5,747		4,802
Total Allowance for Loan Loss	5,799	5,439	4,802	4,426	4,161	3,886
Loans receivable:
Individually evaluated for impairment	722		737
Collectively evaluated for impairment	1,090,110		993,195
Total Loans	1,092,366		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	474		260
Total Allowance for Loan Loss	474	$ 308	260	$ 51	$ 50	$ 63
Loans receivable:
Collectively evaluated for impairment	38,389		28,359
Total Loans	38,389		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	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	$ 505,931	$ 528,517
Construction, Land Development and Other Land	76,318	72,223
Commercial and Other Real Estate	1,092,366	995,624
Other	38,389	28,359
Total Loans	1,713,004	1,624,723
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	481,762	502,624
Construction, Land Development and Other Land	76,318	72,223
Commercial and Other Real Estate	1,062,336	977,525
Other	38,338	28,358
Total Loans	1,658,754	1,580,730
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	10,495	8,738
Commercial and Other Real Estate	11,888	4,878
Total Loans	22,383	13,616
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and Industrial	13,674	17,155
Commercial and Other Real Estate	18,142	13,221
Other	51	1
Total Loans	$ 31,867	$ 30,377

Age Analysis of Recorded Invest

Age Analysis of Recorded Investment (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		$ 779
Total Non Accrual	$ 4,982	3,909
Current	1,708,022	1,620,035
Total Loans	1,713,004	1,624,723
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		425
Total Non Accrual	3,870	2,604
Current	502,061	525,488
Total Loans	505,931	528,517
Construction, Land Development and Other Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	76,318	72,223
Total Loans	76,318	72,223
Commercial and Other Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		354
Total Non Accrual	1,112	1,305
Current	1,091,254	993,965
Total Loans	1,092,366	995,624
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	38,389	28,359
Total Loans	$ 38,389	28,359
Loans 31 to 60 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		546
Loans 31 to 60 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		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		233
Loans 61 to 90 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Accruing		$ 233

Recorded Investment and Unpaid

Recorded Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Related Allowance, With a specific allowance recorded	$ 676,000		$ 676,000		$ 222,000
Recorded Investment	4,192,000		4,192,000		2,651,000
Unpaid Principal Balance	5,849,000		5,849,000		2,894,000
Related Allowance	676,000		676,000		222,000
Average Recorded Investment	4,132,000	$ 5,524,000	3,629,000	$ 5,905,000
Interest Income Recognized		34,000		34,000
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no specific allowance recorded	2,053,000		2,053,000		520,000
Unpaid Principal Balance, With no specific allowance recorded	3,550,000		3,550,000		609,000
Recorded Investment, With a specific allowance recorded	1,417,000		1,417,000		1,394,000
Unpaid Principal Balance, With a specific allowance recorded	1,569,000		1,569,000		1,546,000
Related Allowance, With a specific allowance recorded	624,000		624,000		222,000
Recorded Investment	3,470,000		3,470,000		1,914,000
Unpaid Principal Balance	5,119,000		5,119,000		2,155,000
Related Allowance	624,000		624,000		222,000
Average Recorded Investment, With no specific allowance recorded	2,053,000	1,008,000	1,562,000	1,027,000
Interest Income Recognized, With no specific allowance recorded		34,000		34,000
Average Recorded Investment, With a specific allowance recorded	1,357	1,535	1,342	1,553
Interest Income Recognized, With a specific allowance recorded	0	0	0	0
Average Recorded Investment	3,410,000	2,543,000	2,904,000	2,580,000
Interest Income Recognized		34,000		34,000
Commercial and Other Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no specific allowance recorded	103,000		103,000		737,000
Unpaid Principal Balance, With no specific allowance recorded	107,000		107,000		739,000
Recorded Investment, With a specific allowance recorded	619,000		619,000
Unpaid Principal Balance, With a specific allowance recorded	623,000		623,000
Related Allowance, With a specific allowance recorded	52,000		52,000
Recorded Investment	722,000		722,000		737,000
Unpaid Principal Balance	730,000		730,000		$ 739,000
Related Allowance	52,000		52,000
Average Recorded Investment, With no specific allowance recorded	103,000	2,981,000	106,000	3,325,000
Average Recorded Investment, With a specific allowance recorded	619		619
Interest Income Recognized, With a specific allowance recorded	0	0	0	0
Average Recorded Investment	$ 722,000	$ 2,981,000	$ 725,000	$ 3,325,000

Additional Information on Impai

Additional Information on Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Receivables [Abstract]
Interest foregone on impaired loans	$ 88	$ 103	$ 138	$ 274
Cash collections applied to reduce principal balance	$ 19	2,763	$ 19	2,871
Interest income recognized on cash collections		$ 34		$ 34

Recorded Investment and Unpai56

Recorded Investment and Unpaid Principal Balances for Troubled Debt Restructured Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Recorded Investment		$ 4,192		$ 2,651
Unpaid Principal Balance		5,849		2,894
Interest Income Recognized	$ 34		$ 34
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment		3,470		1,914
Unpaid Principal Balance		5,119		2,155
Interest Income Recognized	$ 34		$ 34
Commercial and Other Real Estate
Financing Receivable, Modifications [Line Items]
Recorded Investment		722		737
Unpaid Principal Balance		730		739
Troubled Debt Restructuring
Financing Receivable, Modifications [Line Items]
Recorded Investment		577		644
Unpaid Principal Balance		785		834
Interest Income Recognized		0		0
Troubled Debt Restructuring | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment		474		530
Unpaid Principal Balance		678		719
Interest Income Recognized		0		0
Troubled Debt Restructuring | Commercial and Other Real Estate
Financing Receivable, Modifications [Line Items]
Recorded Investment		103		114
Unpaid Principal Balance		107		115
Interest Income Recognized		$ 0		$ 0

Accretable Yield for Loans Acqu

Accretable Yield for Loans Acquired (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Receivables [Abstract]
Balance, beginning of period	$ 20,078	$ 7,350	$ 21,402	$ 7,912
Accretion, included in interest income	(1,461)	(889)	(2,677)	(1,451)
Reclassifications to non-accretable yield	(362)	(49)	(470)	(49)
Balance, end of period	$ 18,255	$ 6,412	$ 18,255	$ 6,412

Carrying Value of Purchased Cre

Carrying Value of Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Outstanding [Line Items]
Unpaid Principal Balance	$ 5,849	$ 2,894
Carrying Value	4,192	2,651
PCI loans
Debt Outstanding [Line Items]
Unpaid Principal Balance	3,094	4,285
Carrying Value	1,937	2,385
PCI loans | Commercial and Industrial
Debt Outstanding [Line Items]
Unpaid Principal Balance	727	1,205
Carrying Value	403	693
PCI loans | Commercial and Other Real Estate
Debt Outstanding [Line Items]
Unpaid Principal Balance	2,367	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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Acquired Impaired Loans Change In Accretable Yield [Line Items]
Balance, beginning of period	$ 20,078	$ 7,350	$ 21,402	$ 7,912
Accretion, included in interest income	(1,461)	(889)	(2,677)	(1,451)
Balance, end of period	18,255	6,412	18,255	6,412
PCI loans
Acquired Impaired Loans Change In Accretable Yield [Line Items]
Balance, beginning of period	305	378	324	395
Accretion, included in interest income	(19)	(18)	(38)	(35)
Reclassifications from non-accretable yield	0	0	0	0
Balance, end of period	$ 286	$ 360	$ 286	$ 360

Qualified Affordable Housing 60

Qualified Affordable Housing Project Investments - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Investment Holdings [Line Items]
Net decrease in investment	$ (80,000)	$ (80,000)
Low Income Housing Tax Credits
Investment Holdings [Line Items]
Investment cost	3,900,000		$ 4,100,000
Net decrease in investment	229,000
Amortization cost of investment	1,100,000
Funded liability obligation	800,000
Investment in funding obligation	$ 1,700,000		$ 2,500,000

Borrowings and Subordinated D61

Borrowings and Subordinated Debentures - Additional Information (Detail)	May. 19, 2010USD ($)	Jun. 30, 2015USD ($)Debentures	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Securities with a fair value		$ 28,700,000		$ 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			$ 601,600,000
Credit facility, loan collateral pledge		759,300,000
Credit facility borrowings collateral amount		503,000,000
Investment securities pledged with FHLB		21,600,000
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	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount	$ 14,424	$ 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%
June 30, 2015
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount	$ 14,424
Term	1 day
Maturity Date	Jul. 1, 2015
June 30, 2015 | Minimum
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest Rate	0.13%
June 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	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Financial Instruments Owned and Pledged as Collateral [Line Items]
Amount, gross	$ 12,372
Unamortized fair value adjustment	(2,754)
Net	9,618	$ 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	2.34%
Next Reset Date	Sep. 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	2.04%
Next Reset Date	Sep. 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	2.14%
Next Reset Date	Sep. 15, 2015

Derivative Financial Instrume64

Derivative Financial Instruments - Additional Information (Detail)	Oct. 01, 2012Agreement	Jun. 30, 2015USD ($)AgreementDerivative	Dec. 31, 2014USD ($)
Derivative [Line Items]
Number of pay-fixed, receive-variable interest rate swap agreements | Agreement		21
Outstanding swaps original maturity period		15 years
Certificates of deposit with other financial institutions pledged		$ 2,700,000
Investment securities		261,495,000	$ 274,109,000
Non-interest bearing balances		$ 1,600,000
Accounting Hedges
Derivative [Line Items]
Swap contracts designated as interest rate hedges | Agreement	19
Interest rate swap contracts fair value
Derivative [Line Items]
Acquisition of interest rate swap contracts		Jul. 31, 2012
Investment securities		$ 2,100,000
Trading securities eligible for use as collateral		6,400,000
Interest Rate Swaption
Derivative [Line Items]
Pledged collateral with interest rate swap contracts		4,600,000
1st Enterprise Bank
Derivative [Line Items]
Derivative assets liabilities offset		0
Total notional amount of swaps		$ 35,100,000	$ 35,700,000
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	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Asset Derivatives	$ 738	$ 719
Liability Derivatives	3,009	3,515
PC Bancorp | Accrued Interest Payable and Other Liabilities
Derivative [Line Items]
Liability Derivatives	2,271	2,796
PC Bancorp | Accrued Interest Payable and Other Liabilities | Interest Rate Contracts
Derivative [Line Items]
Liability Derivatives	28,259	29,289
1st Enterprise Bank | Accrued Interest Receivable and Other Assets | Interest rate swap contracts fair value
Derivative [Line Items]
Asset Derivatives	738	719
1st Enterprise Bank | Accrued Interest Payable and Other Liabilities | Interest rate swap contracts fair value
Derivative [Line Items]
Liability Derivatives	738	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	435	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	$ 1,836	$ 2,277

Effect of Derivative Instrument

Effect of Derivative Instruments on Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivatives not Designated as Hedging Instruments | Loans, net
Derivative [Line Items]
Increase in fair value of interest rate swap contracts	$ 57	$ 32	$ 84	$ 93
Payments on interest rate swap contracts on loans	(66)	(68)	(132)	(136)
Net (decrease) in other non-interest income	(9)	(36)	(48)	(43)
Derivatives not Designated as Hedging Instruments | Subordinated debentures
Derivative [Line Items]
Increase in fair value of interest rate swap contracts	356	118	441	301
Derivatives Designated as Hedging Instruments | Loans, net
Derivative [Line Items]
Increase (decrease) in fair value of hedged loans	(73)	165	88	238
Payments on interest rate swap contracts on loans	(285)	(317)	(571)	(633)
Net (decrease) in interest income on loans	$ (2)	$ (34)	$ (42)	$ (94)

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	Jun. 30, 2015	Dec. 31, 2014
Offsetting [Abstract]
Interest rate swap contracts fair value - Gross Amounts Recognized in the Consolidated Balance Sheets	$ 738	$ 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	738	719
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	738	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	738	719
Total - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Total - Net Amounts of Assets Presented in the Consolidated Balance Sheets	738	719
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	738	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	3,009	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	3,009	3,515
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	3,009	3,515
Interest rate swap contracts fair value - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	4,598	4,150
Interest rate swap contracts fair value - Net Amount (Collateral over liability balance required to be pledged)	1,589	635
Securities sold under agreements to repurchase - Gross Amounts Recognized in the Consolidated Balance Sheets	14,424	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	14,424	9,411
Securities sold under agreements to repurchase - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	14,424	9,411
Securities sold under agreements to repurchase - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	28,669	32,304
Securities sold under agreements to repurchase - Net Amount (Collateral over liability balance required to be pledged)	14,245	22,893
Total - Gross Amounts Recognized in the Consolidated Balance Sheets	17,433	12,926
Total - Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Total - Net Amounts of Assets Presented in the Consolidated Balance Sheets	17,433	12,926
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Financial Instruments	17,433	12,926
Total - Gross Amounts Not Offset in the Consolidated Balance Sheets - Collateral Pledged	33,267	36,454
Total - Net Amount (Collateral over liability balance required to be pledged)	$ 15,834	$ 23,528

Future Compensation Expense Rel

Future Compensation Expense Related to Unvested Restricted Stock Grants (Detail) - Equity Plan - Restricted Stock $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remainder of 2015	$ 1,424
2,016	1,879
2,017	760
2,018	273
2,019	31
Thereafter	0
Total	$ 4,367

Stock Options and Restricted 69

Stock Options and Restricted Stock - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 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	$ 400	$ 2,000	$ 1,700	$ 6,000
Total intrinsic value of options exercised	1,340,000	894,000
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	$ 751,000	$ 477,000	1,263,000	$ 881,000
Restricted Stock | Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Future compensation expense related to stock options			$ 4,367,000
Share based compensation, option Granted	40,000		40,000

Share Option Activity (Detail)

Share Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Shares
Exercised, Shares	(112,115)
Equity Plan | Stock Options
Shares
Outstanding stock options at beginning, Shares	1,016,490
Granted, Shares	0
Exercised, Shares	(112,115)
Forfeited, Shares	(5,000)
Expired, Shares	0
Outstanding stock options at ending, Shares	899,375	1,016,490
Exercisable options at June 30, 2015, Shares	899,375
Unvested options at June 30, 2015, Shares	0
Weighted Average Exercise Price
Outstanding stock options at beginning, Weighted Average Exercise Price	$ 10.13
Outstanding stock options at end, Weighted Average Exercise Price	10.20	$ 10.13
Exercisable options at end, Weighted Average Exercise Price	$ 10.20
Weighted Average Remaining Contractual Term
Outstanding stock options, Weighted Average Remaining Contractual Term	1 year 2 months 12 days	1 year 7 months 6 days
Exercisable options at end, Weighted Average Remaining Contractual Term	1 year 2 months 12 days
Aggregate Intrinsic Value
Outstanding stock options at beginning, Aggregate Intrinsic Value	$ 11,770
Outstanding stock options at end, Aggregate Intrinsic Value	10,761	$ 11,770
Exercisable options at end, Aggregate Intrinsic Value	$ 10,761

Restricted Stock Activity (Deta

Restricted Stock Activity (Detail) - 6 months ended Jun. 30, 2015 - Restricted Stock - $ / shares	Total
Number of Shares
Unvested, at beginning, Number of Shares	309,506
Granted, Number of Shares	117,800
Vested, Number of Shares	(50,500)
Cancelled and forfeited, Number of Shares	(8,925)
Unvested, at end, Number of Shares	367,881
Weighted-Average Grant-Date Fair Value per Share
Unvested, at beginning, Weighted-Average Grant-Date Fair Value per Share	$ 16.41
Granted, Weighted-Average Grant-Date Fair Value per Share	20.97
Vested, Weighted-Average Grant-Date Fair Value per Share	12.49
Cancelled and forfeited, Weighted-Average Grant-Date Fair Value per Share	16.69
Unvested, at end, Weighted-Average Grant-Date Fair Value per Share	$ 18.40

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	Nov. 30, 2014	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Issued common stock increased		157,003
Common stock, shares issued		16,840,859	16,840,859	16,683,856
Shares issued during period upon exercise of stock options		112,115
Total exercise value of employee stock options		$ 1,020,000
Share based compensation, unvested restricted shares cancelled		23,987
Share based compensation, restricted shares issued		68,875
Preferred Stock liquidation preference amount per share	$ 1,000
Preferred stock accretion on net discount		$ 101,000
Carrying value of preferred stock		16,487,000	$ 16,487,000	$ 16,004,000
Preferred Stock
Class of Stock [Line Items]
Preferred stock accretion on net discount		$ (483,000)
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		483,000	566,000
Carrying value of preferred stock		16,400,000	16,400,000
Preferred stock value, gross		16,500,000	16,500,000
Preferred stock value net discount		$ 87,000	$ 87,000
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		117,800
Share based compensation, unvested restricted shares cancelled		8,925
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		8,925
Shares repurchased of restricted stock value		$ 504,000

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net unrealized gains (losses) on investment securities: Before Tax
Beginning balance	$ 1,215	$ (80)	$ 333	$ (348)
Net unrealized gains (losses) arising during the period	(1,297)	411	(415)	679
Ending balance	(82)	331	(82)	331
Net unrealized gains (losses) on investment securities: Tax Effect
Beginning balance	(514)	33	(143)	143
Net unrealized gains (losses) arising during the period	548	(169)	177	(279)
Ending balance	34	(136)	34	(136)
Net unrealized gains (losses) on investment securities: Net of Tax
Beginning balance	701	(47)	190	(205)
Net unrealized gains (losses) arising during the period	(749)	242	(238)	400
Ending balance	$ (48)	$ 195	$ (48)	$ 195

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 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	756,000,000	$ 720,000,000
Commitments to Extend Credit | Standby Letters of Credit
Other Commitments [Line Items]
Financial instruments with off balance sheet risk	$ 76,900,000	$ 57,200,000

Financial Assets and Financial

Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	$ 217,481	$ 226,962
Interest Rate Swap Contracts	738	719
Interest Rate Swap Contracts	3,009	3,515
Interest rate swap contracts fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Swap Contracts	738	719
Interest Rate Swap Contracts	3,009	3,515
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	217,481	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	738	719
Interest Rate Swap Contracts	$ 3,009	$ 3,515

Fair Value of Assets and Liab76

Fair Value of Assets and Liabilities - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)Loan	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
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
Number of loans transferred to other real estate owned | Loan		1
Asset transferred to OREO		$ 219,000

Balances of Assets and Liabilit

Balances of Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	$ 2,210	$ 2,023
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)	1,360	1,173
Other real estate owned	850	850
Total	2,210	2,023
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)	1,360	1,173
Other real estate owned	850	850
Total	$ 2,210	$ 2,023

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	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 2,210	$ 2,023
Collateral Dependent Impaired Loans With Specific Valuation Allowance And Or Partial Charge-Off
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 1,360
Valuation Model and/or Factors	Estimated selling costs
Estimated selling costs	15.00%	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	$ 793	$ 1,173
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
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 567
Valuation Model and/or Factors	Sales approach and Estimated selling costs
Estimated selling costs	8.00%
Other Real Estate Owned | Residential Real Estate Appraisal
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, fair value	$ 850	$ 850
Valuation Model and/or Factors	Sales approach and Estimated selling costs
Estimated selling costs	6.00%	6.00%

Level in Fair Value Hierarchy f

Level in Fair Value Hierarchy for Financial Instruments Estimated Fair Values (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	$ 217,481	$ 226,962
Investment securities held-to-maturity	43,808	47,159
Loans, net, Carrying Amount	1,698,880	1,612,113
Loans, net, Fair Value	1,737,061	1,627,717
Interest rate swap contracts, Carrying Amount	738	719
Interest rate swap contracts, Fair Value	738	719
Certificates of deposit, Carrying Amount	59,576	64,840
Certificates of deposit, Fair Value	59,576	64,857
Securities sold under agreements to repurchase, Carrying Amount	14,424	9,411
Securities sold under agreements to repurchase, Fair Value	14,424	9,411
Subordinated debentures, Carrying Amount	9,618	9,538
Subordinated debentures, Fair Value	12,372	12,372
Interest rate swap contracts, Carrying Amount	3,009	3,515
Interest rate swap contracts, Fair Value	3,009	3,515
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	217,481	226,962
Investment securities held-to-maturity, Carrying Amount	44,014	47,147
Loans, net, Carrying Amount	1,698,880	1,612,113
Interest rate swap contracts, Carrying Amount	738	719
Certificates of deposit, Carrying Amount	59,576	64,840
Securities sold under agreements to repurchase, Carrying Amount	14,424	9,411
Subordinated debentures, Carrying Amount	9,618	9,538
Interest rate swap contracts, Carrying Amount	3,009	3,515
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available-for-sale	217,481	226,962
Investment securities held-to-maturity	43,808	47,159
Interest rate swap contracts, Fair Value	738	719
Certificates of deposit, Fair Value	59,576	64,857
Securities sold under agreements to repurchase, Fair Value	14,424	9,411
Subordinated debentures, Fair Value	12,372	12,372
Interest rate swap contracts, Fair Value	3,009	3,515
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net, Fair Value	$ 1,737,061	$ 1,627,717