Square 1 Financial (SQBK) 10-Q 10 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Entity Information [Line Items]	'	'
Entity Registrant Name	'Square 1 Financial Inc	'
Entity Central Index Key	'0001329799	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	28,708,925

Interim_Consolidated_Balance_S

Interim Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$185,606	$105,730
Investment in time deposits	1,250	1,250
Investment securities—available for sale, at fair value	1,186,887	924,229
Investment securities—held to maturity, at amortized cost	278,121	154,255
Loans, net of unearned income of $7.3 million and $4.5 million	1,271,457	1,082,536
Less allowance for loan losses	-22,816	-18,379
Net loans	1,248,641	1,064,157
Premises and equipment, net	3,723	3,061
Deferred income tax assets, net	10,142	15,620
Bank owned life insurance	50,278	31,706
Intangible assets	1,770	2,065
Other receivables	3,619	2,592
Warrant valuation	4,089	5,105
Prepaid expenses	1,690	1,309
Accrued interest receivable and other assets	12,370	15,348
Total assets	2,988,186	2,326,427
Deposits:	'	'
Demand, noninterest-bearing	1,712,674	1,380,024
Demand, interest-bearing	164,859	103,638
Money market deposit accounts	774,405	596,247
Time deposits	16,507	26,818
Total deposits	2,668,445	2,106,727
Borrowings and repurchase agreements	0	12,737
Junior subordinated debt	0	6,207
Accrued interest payable and other liabilities	25,539	11,607
Total liabilities	2,693,984	2,137,278
Commitments and contingencies (Notes 11 and 16)	'	'
Shareholders’ equity:	'	'
Convertible preferred stock, $.01 par value; 10,000,000 shares authorized, 0 shares and 5,000 shares issued and outstanding, respectively	0	0
Common stock, $.01 par value; 70,000,000 and 45,000,000 shares authorized, 28,700,825 shares and 23,611,746 shares issued and outstanding, respectively	287	236
Additional paid in capital	251,841	183,716
Accumulated other comprehensive (loss) income	8,193	-4,096
Retained earnings	33,881	9,293
Total shareholders’ equity	294,202	189,149
Total liabilities and shareholders’ equity	$2,988,186	$2,326,427

Interim_Consolidated_Balance_S1

Interim Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Unearned income on loans	$7,337	$4,549
Convertible preferred stock, par value	$0.01	$0.01
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares issued and outstanding	0	5,000
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	70,000,000	45,000,000
Common Stock, Shares Issued and Outstanding	28,700,825	23,611,746

Interim_Consolidated_Statement

Interim Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest income:	'	'	'	'
Loans including fees on loans	$19,326	$14,949	$53,448	$41,575
Investment securities	7,528	4,993	21,079	13,266
Federal funds and other short-term investments	104	78	305	233
Total interest income	26,958	20,020	74,832	55,074
Interest expense:	'	'	'	'
Deposits	150	182	423	476
Borrowings and repurchase agreements	0	6	4	30
Junior subordinated debt	0	158	215	475
Total interest expense	150	346	642	981
Net interest income	26,808	19,674	74,190	54,093
Provision for loan losses	2,500	2,850	8,614	9,340
Net interest income after provision for loan losses	24,308	16,824	65,576	44,753
Noninterest income:	'	'	'	'
Service charges and fees	1,150	1,069	3,345	3,020
Foreign exchange fees	1,792	1,270	4,795	3,635
Credit card and merchant income	914	605	2,314	1,787
Investment impairment	0	-782	-43	-1,525
Net gain on securities	-235	847	-188	1,696
Letter of credit fees	293	271	1,104	785
Warrant income	721	899	2,937	3,263
Gain on sale of loans	248	444	750	1,665
Bank owned life insurance	330	298	936	771
Other	319	1,808	3,094	3,243
Total noninterest income	5,532	6,729	19,044	18,340
Noninterest expense:	'	'	'	'
Personnel	10,790	8,639	32,148	26,128
Occupancy	713	691	2,227	2,082
Data processing	1,090	897	2,830	2,229
Furniture and equipment	769	589	2,131	1,850
Advertising and promotions	223	267	840	891
Professional fees	976	876	2,363	2,280
Telecommunications	246	283	791	866
Travel	259	211	717	762
FDIC assessment	393	349	1,145	949
Other	1,376	857	3,826	2,768
Total noninterest expense	16,835	13,659	49,018	40,805
Income before income tax expense	13,005	9,894	35,602	22,288
Income tax expense	4,253	2,926	10,951	6,845
Net income	8,752	6,968	24,651	15,443
Dividends on preferred stock	0	62	63	188
Net income available to common shareholders	$8,752	$6,906	$24,588	$15,255
Earnings per share—basic	$0.31	$0.29	$0.91	$0.65
Earnings per share—diluted	$0.29	$0.29	$0.87	$0.64

Interim_Consolidated_Statement1

Interim Consolidated Statements of Comprehensive Income Statement (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	$8,752	$6,968	$24,651	$15,443
Unrealized gains on securities:	'	'	'	'
Unrealized holding gains (losses) arising during period	740	-1,891	12,186	-9,312
Less: reclassification adjustment for gains (losses) included in net income	145	-887	103	-1,332
Other comprehensive income (loss)	885	-2,778	12,289	-10,644
Comprehensive income	9,637	4,190	36,940	4,799
Dividends on preferred stock	0	62	63	188
Comprehensive income available to common shareholders	$9,637	$4,128	$36,877	$4,611

Interim_Consolidated_Statement2

Interim Consolidated Statements of Shareholders' Equity (USD $)	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained (Deficit) Earnings [Member]
In Thousands, except Share data
Balance at Dec. 31, 2012	$176,726	$0	$235	$182,135	$7,195	($12,839)
Balance common shares at Dec. 31, 2012	'	'	23,491,697	'	'	'
Balance preferred shares at Dec. 31, 2012	'	5,000	'	'	'	'
Issuance of common stock (shares)	'	'	9,566	'	'	'
Issuance of common stock (value), net of issuance costs	29	'	'	29	'	'
Stock-based compensation	1,047	'	'	1,047	'	'
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	1	'	'	'	'	'
Dividends on preferred stock	-188	'	'	'	'	-188
Net income	15,443	'	'	'	'	15,443
Unrealized gain (loss) on securities net of tax	-10,644	'	'	'	-10,644	'
Balance at Sep. 30, 2013	182,413	0	235	183,211	-3,449	2,416
Balance common shares at Sep. 30, 2013	'	'	23,501,263	'	'	'
Balance preferred shares at Sep. 30, 2013	'	5,000	'	'	'	'
Balance at Dec. 31, 2013	189,149	0	236	183,716	-4,096	9,293
Balance common shares at Dec. 31, 2013	23,611,746	'	23,611,746	'	'	'
Balance preferred shares at Dec. 31, 2013	5,000	5,000	'	'	'	'
Issuance of common stock (shares)	'	'	3,847,509	'	'	'
Issuance of common stock (value), net of issuance costs	60,047	'	39	60,008	'	'
Stock-based compensation	2,098	'	'	2,098	'	'
Conversion of preferred stock, shares converted	'	-5,000	'	'	'	'
Common shares issued upon conversion of preferred stock	'	'	500,070	'	'	'
Conversion of preferred stock, amount	1	'	5	'	'	'
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	2,300	'	'	-4	'	'
Conversion of trust preferred securities, common shares issued	'	'	741,500	'	'	'
Conversion of trust preferred securities, amount	'	'	7	'	'	'
Conversion of trust preferred securities, APIC	'	'	'	6,023	'	'
Conversion of trust preferred securities	6,030	'	'	'	'	'
Dividends on preferred stock	-63	'	'	'	'	-63
Net income	24,651	'	'	'	'	24,651
Unrealized gain (loss) on securities net of tax	12,289	'	'	'	12,289	'
Balance at Sep. 30, 2014	$294,202	$0	$287	$251,841	$8,193	$33,881
Balance common shares at Sep. 30, 2014	28,700,825	'	28,700,825	'	'	'
Balance preferred shares at Sep. 30, 2014	0	0	'	'	'	'

Interim_Consolidated_Statement3

Interim Consolidated Statements of Shareholders' Equity Parenthetical (Parentheticals) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Unrealized gain (loss) on securities, net of tax - TAX AMOUNT	$7,500	$6,300
Issuance of common stock, net of issuance costs - ISSUANCE COSTS	$2,300	$1

Interim_Statement_of_Cash_Flow

Interim Statement of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Net income	$24,651	$15,443
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	720	845
Amortization on investment securities, net	13,366	12,190
Provision for loan losses	8,614	9,340
Stock-based compensation	2,390	1,059
Loss (gain) on sale of securities available for sale	188	-1,696
Investment impairment	43	1,525
Deferred income tax provision	-2,036	-1,566
Earnings on bank owned life insurance	-936	-771
Changes in assets and liabilities:	'	'
Accrued interest receivable and other assets	2,880	-4,169
Accrued interest payable and other liabilities	13,931	-1,183
Net cash provided by operating activities	63,811	31,017
Cash flows from investing activities:	'	'
Purchase of securities available for sale	-413,659	-351,909
Purchase of securities held to maturity	-90,635	-56,135
Proceeds from calls/maturities of securities available for sale	118,172	117,891
Proceeds from sales of securities available for sale	3,419	77,902
Proceeds from paydowns of securities held to maturity	2,387	2,047
Net increase in loans	-193,097	-160,848
Purchase of bank owned life insurance	-17,635	-10,000
Purchases of premises and equipment	-1,383	-369
Net cash used in investing activities	-592,431	-381,421
Cash flows from financing activities:	'	'
Net increase in deposits	561,718	345,061
Net (decrease) increase in repurchase agreements	-12,737	25,605
Decrease in FHLB borrowings	0	-15,000
(Decrease) increase in subordinated debt	-6,207	1
Preferred dividends paid	-63	-188
Proceeds from issuance of common stock, net of issuance costs	65,004	-1
Proceeds from issuance of shares under stock-based compensation plan	781	18
Net cash provided by financing activities	608,496	355,496
Net change in cash and cash equivalents	79,876	5,092
Cash and cash equivalents at beginning of year	105,730	48,971
Cash and cash equivalents at end of year	185,606	54,063
Supplemental statement of cash flow disclosures	'	'
Interest paid	642	981
Income taxes paid	$13,470	$7,815

Organization_and_Basis_of_Pres

Organization and Basis of Presentation (Notes)	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Basis of Presentation	'
	ORGANIZATION AND BASIS OF PRESENTATION
	Organization and Nature of Operations
	Square 1 Financial, Inc. (the “Company”) is a bank holding company incorporated under the laws of Delaware on October 6, 2004. The Company’s primary function is to serve as the holding company for its wholly-owned subsidiary, Square 1 Bank. Square 1 Bank (the “Bank”) was incorporated under the laws of North Carolina on July 11, 2005 and commenced banking operations on August 8, 2005. The Bank is not a member of the Federal Reserve System. The Bank provides a full range of commercial banking services primarily to companies that have received institutional investment, typically from venture capital and private equity sources. The Bank’s primary source of revenue is interest earned from loans to customers and from invested cash and securities and non-interest income derived from various fees. During 2007, the Company formed Square 1 Ventures, LLC (a Delaware limited liability company); a wholly-owned subsidiary established to sponsor a fund of funds. Square 1 Ventures, LLC is consolidated into the Company’s financial statements. In 2013, the Bank formed Square 1 Asset Management, a wholly owned subsidiary of the Bank and SEC-registered investment adviser, to provide an investment alternative for clients. On March 31, 2014, the Company closed on its initial public offering ("IPO").
	The Bank operates one branch in Durham, NC and loan production offices in Menlo Park, San Francisco, San Diego, Los Angeles, Orange County and Campbell, CA; and Austin, New York, Denver, Boston, Seattle and the District of Columbia area. The Company’s corporate headquarters are located in Durham, NC.
	In September 2008, Square 1 Financial Capital Trust I (the “Trust”), a Delaware trust, was formed by the Company, as Sponsor, in order to facilitate the issuance of convertible trust preferred securities. The Trust invested the total proceeds from the sales of the convertible trust preferred securities in convertible junior subordinated deferrable interest debentures issued by the Company. The assets of the trust were not assets of the Company and were not consolidated into the Company’s consolidated financial statements. The subordinated debentures issued by the Company to the Trust were included in borrowings, and the Company’s equity interests in the Trust were included in other assets at December 31, 2013. The Company notified all holders of trust preferred securities of its intent to redeem such securities as of June 30, 2014 and all outstanding trust preferred securities were converted by the holders into shares of Company common stock prior to that date (see Note 8).
	In 2013, the Bank acquired the business operations and key employees of Sand Hill Finance LLC, a factoring company located in California, as part of the Bank's strategy to continue to grow its asset-based lending portfolio. Square 1 Bank acquired approximately $11.9 million of factoring loans from Sand Hill Finance LLC and certain other assets for a total purchase price of approximately $12.4 million, which included the repayment of $7.2 million in debt. Additionally, the Bank assumed obligations under the real estate lease for the company’s primary place of business and hired the company’s seven employees. The Bank has integrated the factoring product into its existing suite of asset-based lending products.
	Basis of Presentation
	These unaudited interim consolidated financial statements have been prepared on a consistent basis with the accounting policies described in the notes to the audited financial statements for the fiscal year ended December 31, 2013 included in the Company's Registration Statement on Form S-1 (File No. 333-193197), which was initially filed with the Securities and Exchange Commission ("SEC") on January 6, 2014, subsequently amended thereafter and declared effective by the SEC on March 26, 2014 (the "Registration Statement"). These unaudited interim consolidated financial statements have also been prepared in accordance with the instructions for Form 10-Q pursuant to the rules and regulations of the SEC, and as such certain footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted. Because the accompanying interim financial statements do not include all of the information and footnotes required by GAAP for annual financial statements, they should be read in conjunction with the audited financial statements for the fiscal year ended December 31, 2013 and notes thereto included in the Registration Statement. Certain prior year amounts have been reclassified to conform to current year presentation.
	The amounts included in these financial statements are unaudited but, in the opinion of management, reflect all adjustments necessary to fairly present the Company’s financial position and results of operations for the interim periods. Unless otherwise noted, all adjustments are normal and recurring in nature. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The results of operations for interim periods are not necessarily indicative of amounts expected for the entire year or future periods.
	Principles of Consolidation
	The consolidated financial statements include the financial statements of Square 1 Financial and its consolidated subsidiaries and other entities in which it has a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation. In addition, the Company evaluates its relationships with other entities to identify whether they are variable interest entities ("VIEs") and to assess whether it is the primary beneficiary of such entities. If the determination was made that the Company is the primary beneficiary, then that entity would be included in the consolidated financial statements. If an entity is not a VIE, the Company also evaluates arrangements in which there is a general partner or managing member to determine whether consolidation is appropriate.
	Square 1 Venture 1, L.P.-The Company owns approximately a 2% partnership interest in Square 1 Venture 1, L.P., which was formed for the primary purpose of sponsoring a fund of funds. The Company has determined that Square 1 Venture 1, L.P. is not a VIE for all periods presented; accordingly, Square 1 Venture 1, L.P. is not consolidated with the Company. The Company accounts for the investment in Square 1 Venture 1, L.P. using the equity method of accounting. For the three and nine months ended September 30, 2014, gains of $0.1 million and $0.8 million, respectively, were recognized. For the three and nine months ended September 30, 2013, gains of $0.2 million were recognized. The fair value of the investment at September 30, 2014 and December 31, 2013, was $1.8 million and $1.0 million, respectively, and is included in other assets on the balance sheet.
	On April 1, 2014, Square 1 Ventures, LLC transferred the contract for the management of Square 1 Venture 1, L.P. to Industry Ventures, a fund-of-funds manager in San Francisco, CA. In connection with this transfer, we recorded a gain of $0.5 million. We do not expect the impact of the sale of the management contract to have an ongoing material impact to our results of operations or financial condition.
	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 disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The more significant estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, the valuation of investment securities, recognition and measurement of income tax assets and liabilities and the valuation of equity warrant assets and foreclosed assets.
	Cash and Cash Equivalents
	Cash and cash equivalents include noninterest-earning and interest-earning deposits at other institutions, federal funds sold and other short term investments. Generally, federal funds are purchased and sold for one-day periods. At times, the Bank places deposits with high credit-quality financial institutions in amounts which may be in excess of federally insured limits. The Bank is required to maintain reserve and clearing balances with the Federal Reserve Bank. Accordingly, the Bank has amounts restricted for this purpose of $15.5 million and $12.0 million in the consolidated balance sheet at September 30, 2014 and December 31, 2013, respectively.

New_Accounting_Standards_Notes

New Accounting Standards (Notes)	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
New Accounting Standards	'
	NEW ACCOUNTING STANDARDS
	In August 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40), Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. ASU 2014-15 requires that in connection with preparing financial statements for each annual and interim reporting period, an entity’s management should evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued (or within one year after the date that the financial statements are available to be issued when applicable). Management’s evaluation should be based on relevant conditions and events that are known and reasonably knowable at the date that the financial statements are issued (or at the date that the financial statements are available to be issued when applicable). ASU 2014-15 also provides principles for considering the mitigating effect of management’s plans, requires certain disclosures when substantial doubt is alleviated as a result of consideration of management’s plans and requires an express statement and other disclosures when substantial doubt is not alleviated. For the Company, ASU 2014-15 is effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early adoption is permitted. The Company does not expect adoption of ASU 2014-15 to have a material effect on its consolidated results of operations, financial position or disclosures.
	In June 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. ASU 2014-11 requires that repurchase-to-maturity transactions be accounted for as secured borrowings consistent with the accounting for other repurchase agreements. In addition, the amendments require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty (a repurchase financing), which will result in secured borrowing accounting for the repurchase agreement. Additionally, the new guidance requires expanded disclosures about transfers accounted for as sales in transactions that are economically similar to repurchase agreements, in which the transferor retains substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction and about the types of collateral pledged in repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions and the tenor of those transactions. For the Company, ASU 2014-11 is effective for the first interim or annual period beginning after December 15, 2014. Early adoption is not permitted for public entities. The Company does not expect adoption of this ASU to have a material effect on its consolidated results of operations or financial position.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The amendments in ASU 2014-09 create Accounting Standards Codification (ASC) Topic 606, Revenue from Contracts with Customers, and supersede the revenue recognition requirements in ASC Topic 605, Revenue Recognition, including most industry-specific revenue recognition guidance. In addition, the amendments create new ASC Subtopic 340-40, Other Assets and Deferred Costs—Contracts with Customers. In summary, the core principle of ASC Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance in ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. Exclusions include lease contracts; insurance contracts; financial instruments and other contractual rights and obligations, such as receivables, investments, liabilities, debt, derivatives, and transfers and servicing; and guarantees other than product and service warranties. In addition, the existing requirements for the recognition of a gain or loss on the transfer of nonfinancial assets that are not in a contract with a customer (for example, assets within the scope of ASC Topic 360, Property, Plant, and Equipment, and intangible assets within the scope of ASC Topic 350, Intangibles-Goodwill and Other) are amended to be consistent with the guidance on recognition and measurement (including the constraint on revenue) in ASU 2014-09. An entity can apply this standard retrospectively to each prior reporting period presented (full retrospective method) or retrospectively with the cumulative effect of initially applying the standard recognized at the date of initial application in retained earnings (simplified transition method). For the Company, the amendments in ASU 2014-09 are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted for public entities. The Company is currently assessing the impacts of adopting ASU 2014-09.
	In April 2014, the FASB issued ASU No. 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The amendments in the ASU change the criteria for reporting discontinued operations. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. Those strategic shifts should have a major effect on the organization’s operations and financial results. Additionally, the new guidance requires expanded disclosures about the assets, liabilities, income, and expenses of discontinued operations and requires disclosure of the pre-tax income attributable to a disposal of a significant part of an organization that does not qualify for discontinued operations reporting. For the Company, ASU No. 2014-08 would be applied prospectively to disposals or classifications as held for sale for annual financial statements with fiscal years beginning on or after December 15, 2014. Early adoption is permitted. The Company does not expect adoption of this ASU to have a material effect on its consolidated results of operations or financial position.
	The FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, to improve the transparency of reporting reclassifications out of accumulated other comprehensive income (OCI) by requiring entities to present in one place information about significant amounts reclassified and, in some cases, to provide cross-references to related footnote disclosures. The amendments do not change the current requirements for reporting net income or OCI in the financial statements, nor do they require new information to be disclosed. The amendments require prospective application and were effective for public entities in reporting periods beginning after December 15, 2012. For nonpublic companies, this revised guidance was effective on a prospective basis for interim and annual periods beginning January 1, 2014. Other than additional disclosures or a change in the presentation on the statement of comprehensive income, this revised guidance did not impact the Company's consolidated results of operations or financial position.
	In June 2013, the FASB issued ASU 2013-08, Financial Services—Investment Companies (ASC Topic 946): Amendments to the Scope, Measurement and Disclosure Requirement. This ASU modifies the guidance in ASC 946 for determining whether an entity is an investment company, as well as the measurement and disclosure requirements for investment companies. The ASU does not change current accounting where a noninvestment company parent retains the specialized accounting applied by an investment company subsidiary in consolidation. ASU 2013-08 has been applied prospectively for all periods beginning after December 15, 2013. This ASU did not have a material effect on the Company's results of operations or financial position.

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	INVESTMENT SECURITIES
	Investments in securities are classified into three categories and accounted for as follows:
	Securities Held to Maturity—Debt securities that the Company has the positive intent and ability to hold to maturity are classified as held to maturity and reported at amortized cost; or
	Trading Securities—Debt and equity securities that are bought and held principally for the purpose of selling in the near term are classified as trading securities and reported at fair value, with unrealized gains and losses included in earnings; or
	Securities Available for Sale—Debt and equity securities not classified as either held to maturity securities or trading securities are classified as available for sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported as other comprehensive income, a separate component of shareholders’ equity.
	The Company intends to hold its securities classified as available for sale securities for an indefinite period of time but may sell them prior to maturity. All other securities, which the Company has the positive intent and ability to hold to maturity, are classified as held to maturity securities. The initial classification of securities is determined at the date of purchase. Gains and losses on sales of securities, computed based on specific identification of the adjusted cost of each security, are included in noninterest income at the time of the sales. The Company's investments include agency direct obligations, Small Business Administration ("SBA") pools, agency and non-agency mortgage backed securities ("MBS"), corporate securities, municipal bonds, and asset backed securities ("ABS"). Equity securities include securities obtained from the exercise of equity warrants and required to be held until the expiration of their respective lock-up periods, which expire within one year. The Company intends to monetize these securities upon removal of all sale restrictions (see Note 14).
	Investment securities at September 30, 2014 and December 31, 2013, are summarized as follows:
	(in thousands)	30-Sep-14
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	Available for sale securities:
	U.S. treasuries	$	19,679	$	—		$	(17	)	$	19,662
	Agency direct obligations	34,534		113			—			34,647
	SBA pools	143,110		1,973			(42		)	145,041
	Agency MBS	577,389		7,747			(1,098		)	584,038
	Municipal bonds	96,402		1,794			(70		)	98,126
	Corporates	116,840		4,217			(32		)	121,025
	Non-agency MBS	132,909		1,278			(1,300		)	132,887
	Other ABS	49,574		90			(656		)	49,008
	Equity securities	2,764		23			(334		)	2,453
	Total	$	1,173,201	$	17,235		$	(3,549	)	$	1,186,887
	Held to maturity securities:
	Agency mortgaged-backed	$	60,663	$	800		$	(264	)	$	61,199
	Municipal bonds	165,531		7,273			(606		)	172,198
	Corporates	51,927		10			(2,177		)	49,760
	Total	$	278,121	$	8,083		$	(3,047	)	$	283,157
	(in thousands)	31-Dec-13
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	Available for sale securities:
	Agency direct obligations	$	34,853	$	208		$	—		$	35,061
	SBA pools	127,309		1,958			(56		)	129,211
	Agency mortgaged-backed	445,855		4,395			(2,400		)	447,850
	Municipal bonds	97,532		—			(5,503		)	92,029
	Corporates	148,288		1,173			(3,644		)	145,817
	Non-agency mortgage-backed securities	54,134		371			(2,335		)	52,170
	Other asset-backed securities	22,787		112			(808		)	22,091
	Total	$	930,758	$	8,217		$	(14,746	)	$	924,229
	Held to maturity securities:
	Agency mortgaged-backed	$	18,666	$	188		$	(608	)	$	18,246
	Municipal bonds	127,339		426			(5,756		)	122,009
	Corporates	8,250		—			(1,951		)	6,299
	Total	$	154,255	$	614		$	(8,315	)	$	146,554
	Investment securities with a fair value of $297.0 million and $343.7 million at September 30, 2014 and December 31, 2013, respectively, were pledged to secure customer repurchase agreements and to secure prospective borrowing capacities at our correspondent banks, the Federal Reserve Bank, and the Federal Home Loan Bank of Atlanta.
	The following tables show the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired. Investment securities contained in the table are aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2014 and December 31, 2013:
	(in thousands)	30-Sep-14
		Less Than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
				Losses						Losses					Losses
	Available for sale securities:
	U.S. Treasuries	$	19,662	$	(17	)	$	—		$	—		$	19,662	$	(17	)
	SBA Pools	4,906		(34		)	4,440			(8		)	9,346		(42		)
	Agency MBS	115,807		(801		)	24,197			(297		)	140,004		(1,098		)
	Municipal Bonds	3,780		(7		)	6,390			(63		)	10,170		(70		)
	Corporates	5,013		(32		)	—			—			5,013		(32		)
	Non-Agency MBS	57,578		(476		)	18,888			(824		)	76,466		(1,300		)
	Other ABS	5,306		(8		)	4,819			(648		)	10,125		(656		)
	Equity securities	2,218		(334		)	—			—			2,218		(334		)
	Total	$	214,270	$	(1,709	)	$	58,734		$	(1,840	)	$	273,004	$	(3,549	)
	Held to maturity securities:
	Agency MBS	$	4,970	$	(26	)	$	5,971		$	(238	)	$	10,941	$	(264	)
Municipal Bonds	11,022		(80		)	22,345			(526		)	33,367		(606		)
Corporates	39,120		(658		)	6,750			(1,519		)	45,870		(2,177		)
Total	$	55,112	$	(764	)	$	35,066		$	(2,283	)	$	90,178	$	(3,047	)
(in thousands)	31-Dec-13
	Less Than 12 Months					12 Months or Greater						Total
	Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
			Losses						Losses					Losses
Available for sale securities:
SBA Pools	$	13,724	$	(56	)	$	—		$	—		$	13,724	$	(56	)
Agency MBS	126,563		(1,801		)	24,288			(599		)	150,851		(2,400		)
Municipal Bonds	92,029		(5,503		)	—			—			92,029		(5,503		)
Corporates	72,092		(3,644		)	—			—			72,092		(3,644		)
Non-Agency MBS	22,422		(410		)	14,138			(1,925		)	36,560		(2,335		)
Other ABS	—		—			4,852			(808		)	4,852		(808		)
Total	$	326,830	$	(11,414	)	$	43,278		$	(3,332	)	$	370,108	$	(14,746	)
Held to maturity securities:
Agency MBS	$	13,575	$	(608	)	$	—		$	—		$	13,575	$	(608	)
Municipal Bonds	77,344		(3,313		)	16,368			(2,443		)	93,712		(5,756		)
Corporates	—		—			6,299			(1,951		)	6,299		(1,951		)
Total	$	90,919	$	(3,921	)	$	22,667		$	(4,394	)	$	113,586	$	(8,315	)
At September 30, 2014, there were a total of 74 available for sale securities that were in an unrealized loss position, of which 26 investments had fair values less than their amortized cost for a period of time greater than 12 months. At December 31, 2013, there were a total of 104 available for sale securities that were in an unrealized loss position, of which 25 investments had fair values less than their amortized cost for a period of time greater than 12 months. At September 30, 2014, the fair value of equity securities included $1.3 million in equity securities obtained from the exercise of equity warrants, which the Company intends to monetize upon removal of all sale restrictions, and $1.1 million in other equity securities.
The Company performs extensive ongoing evaluations of the investment portfolio at the individual bond level, including market valuations and impairment analyses. The Company had no recorded impairment for the three months ended September 30, 2014 and $0.8 million of impairment on certain mortgage-related securities for the three months ended September 30, 2013. The Company had recorded impairment of $43 thousand and $1.5 million of impairment on certain mortgage-related securities for the nine months ended September 30, 2014 and 2013, respectively. The Company had deemed these securities permanently impaired and unlikely to receive full principal, even if the investments were held to maturity. The Company believes the remainder of the investment portfolio, based on the evaluation performed, will be paid in full and that any temporary impairment will be fully recoverable prior to or at maturity. The Company has the ability and intent to hold the investment securities for a reasonable period of time sufficient for a forecasted recovery of fair value or until maturity.
The amortized cost of debt securities at September 30, 2014, by contractual maturity, is shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
(in thousands)	30-Sep-14
	Total		Less than			After One			After Five			After Ten
	Amortized		One Year			Year to			Years to			Years
	Cost		Amortized			Five Years			Ten Years			Amortized
			Cost			Amortized			Amortized			Cost
						Cost			Cost
Available for sale securities:
Contractual maturity
U.S. Treasuries	$	19,679	$	—		$	19,679		$	—		$	—
Agency Direct Obligations	34,534		3,890			30,644			—			—
SBA Pools	143,110		—			5,200			60,428			77,482
Agency MBS	577,389		—			1,856			35,356			540,177
Municipal Bonds	96,402		—			—			12,016			84,386
Corporates	116,840		—			55,687			12,950			48,203
Non-Agency MBS	132,909		—			1,495			15,316			116,098
Other ABS	49,574		12,999			15,831			15,277			5,467
Equity securities	2,764		—			—			—			2,764
Total	$	1,173,201	$	16,889		$	130,392		$	151,343		$	874,577
Held to maturity securities:
Contractual maturity
Agency MBS	$	60,663	$	—		$	—		$	—		$	60,663
Municipal Bonds	165,531		—			—			7,460			158,071
Corporates	51,927		—			—			—			51,927
Total	$	278,121	$	—		$	—		$	7,460		$	270,661

Loans_and_Allowance_for_Loan_L

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Loans and Allowance for Loan Losses	'
	LOANS AND ALLOWANCE FOR LOAN LOSSES
	Loans
	The composition of loans, net of unearned income, broken out by portfolio segment at September 30, 2014 and December 31, 2013, are as follows:
	(in thousands)		30-Sep-14				31-Dec-13
	Commercial loans:
	Technology		$	634,908			$	543,788
	Life sciences		240,375				224,069
	Asset-based loans		152,282				111,251
	Venture capital/private equity		159,349				143,468
	SBA and USDA		33,245				23,719
	Other		5,468				1,424
	Total commercial loans		1,225,627				1,047,719
	Real estate loans:
	SBA and USDA		31,532				27,504
	Total real estate loans		31,532				27,504
	Construction loans:
	SBA and USDA		2,290				287
	Total construction loans		2,290				287
	Credit cards		19,345				11,575
	Less unearned income, net		(7,337		)		(4,549		)
	Total loans, net of unearned income		$	1,271,457			$	1,082,536
	Directors and executive officers of the Company, including their immediate families and companies in which they have an interest, may be loan customers in the normal course of business. The Company had one commitment and three commitments, respectively, totaling $7.5 million to these parties at September 30, 2014 and December 31, 2013.
	The Bank makes loans under the Small Business Administration (SBA) and United States Department of Agriculture (USDA) programs. At September 30, 2014 and December 31, 2013, the outstanding balances of these loans being serviced were $126.1 million and $114.6 million, respectively. The SBA/USDA guaranteed portions of eight and 21 of these loans were sold to the secondary market during 2014 and 2013, respectively. The outstanding sold balance at September 30, 2014 and December 31, 2013, was $59.3 million and $63.1 million, respectively.
	The Company accounts for loan servicing rights or liabilities under Accounting Standards Codification (ASC) 860, “Transfers and Servicing.” ASC requires the Company to recognize a servicing asset or servicing liability each time it undertakes an obligation to service a financial asset. Changes in the fair value of the servicing asset are recognized in other noninterest income. The valuation methodology estimates the present value of future cash flows based on the unique characteristics of the loan, market-based assumptions for prepayment speeds, and discount rate assumptions. The servicing asset is recorded in intangible assets in the financial statements.
	See Note 15 for a summary of the activity for the Company's servicing assets.
	Allowance for Loan Losses
	The following tables summarize the activity in the allowance for loan losses during the three and nine months ended September 30, 2014 and 2013, broken out by portfolio segment:
	(in thousands)		Three Months Ended September 30, 2014
			Beginning				Charge				Recoveries				Provision				Ending
			Balance				Offs								(Benefit)				Balance
	Commercial loans
	Technology		$	13,380			$	382			$	13			$	3,185			$	16,196
	Life sciences		5,174				1,107				5				(1,063		)		3,009
	Asset-based loans		1,363				—				—				501				1,864
	Venture capital/private equity		143				—				—				71				214
	SBA and USDA		614				—				14				(43		)		585
	Other		11				—				—				(3		)		8
	Total commercial loans		20,685				1,489				32				2,648				21,876
	Real estate loans:
	SBA and USDA		702				—				217				(195		)		724
	Total real estate loans		702				—				217				(195		)		724
	Construction:
	SBA and USDA		19				—				—				4				23
	Total construction loans		19				—				—				4				23
	Credit cards		150				—				—				43				193
	Total loans		$	21,556			$	1,489			$	249			$	2,500			$	22,816
	(in thousands)		Three Months Ended September 30, 2013
			Beginning				Charge				Recoveries				Provision				Ending
			Balance				Offs								(Benefit)				Balance
	Commercial loans
	Technology		$	14,637			$	2,988			$	14			$	1,434			$	13,097
	Life sciences		2,033				—				—				200				2,233
	Asset-based loans		576				—				—				195				771
	Venture capital/private equity		133				—				—				(9		)		124
	SBA and USDA		211				—				—				457				668
	Other		85				—				—				(68		)		17
	Total commercial loans		17,675				2,988				14				2,209				16,910
	Real estate loans:
	SBA and USDA		462				—				—				617				1,079
	Total real estate loans		462				—				—				617				1,079
	Construction:
	SBA and USDA		—				—				—				12				12
	Total construction loans		—				—				—				12				12
Credit cards		80				—				—				12				92
Total loans		$	18,217			$	2,988			$	14			$	2,850			$	18,093
(in thousands)		Nine Months Ended September 30, 2014
		Beginning				Charge				Recoveries				Provision				Ending
		Balance				Offs								(Benefit)				Balance
Commercial loans
Technology		$	13,609			$	2,548			$	169			$	4,966			$	16,196
Life sciences		1,971				1,516				5				2,549				3,009
Asset based loans		684				—				—				1,180				1,864
Venture capital/private equity		197				—				—				17				214
SBA and USDA		627				128				14				72				585
Other		2				—				—				6				8
Total commercial loans		17,090				4,192				188				8,790				21,876
Real estate loans:
SBA and USDA		1,163				390				217				(266		)		724
Total real estate loans		1,163				390				217				(266		)		724
Construction:
SBA and USDA		10				—				—				13				23
Total construction loans		10				—				—				13				23
Credit cards		116				—				—				77				193
Total loans		$	18,379			$	4,582			$	405			$	8,614			$	22,816
(in thousands)		Nine Months Ended September 30, 2013
		Beginning				Charge				Recoveries				Provision				Ending
		Balance				Offs								(Benefit)				Balance
Commercial loans
Technology		$	10,651			$	5,932			$	692			7,686				$	13,097
Life sciences		804				—				—				1,429				2,233
Asset based loans		1,102				—				—				(331		)		771
Venture capital/private equity		152				—				—				(28		)		124
SBA and USDA		381				—				150				137				668
Other		4				—				—				13				17
Total commercial loans		13,094				5,932				842				8,906				16,910
Real estate loans:
SBA and USDA		680				—				—				399				1,079
Total real estate loans		680				—				—				399				1,079
Construction:
SBA and USDA		—				—				—				12				12
Total construction loans		—				—				—				12				12
Credit cards		69				—				—				23				92
Total loans		$	13,843			$	5,932			$	842			$	9,340			$	18,093
The following tables summarize the allowance for loan losses individually and collectively evaluated for impairment at September 30, 2014 and December 31, 2013, broken out by portfolio segment:
(in thousands)		September 30, 2014
		Ending  Balance:				Ending  Balance:
		Individually				Collectively
		Evaluated for				Evaluated for
		Impairment				Impairment
Commercial loans
Technology		$	7,220			$	8,976
Life sciences		1,107				1,902
Asset based loans		—				1,864
Venture capital/private equity		—				214
SBA and USDA		47				538
Other		—				8
Total commercial loans		8,374				13,502
Real estate loans:
SBA and USDA		—				724
Total real estate loans		—				724
Construction:
SBA and USDA		—				23
Total construction loans		—				23
Credit cards		—				193
Total loans		$	8,374			$	14,442
(in thousands)		December 31, 2013
		Ending  Balance:				Ending  Balance:
		Individually				Collectively
		Evaluated for				Evaluated for
		Impairment				Impairment
Commercial loans
Technology		$	4,830			$	7,646
Life sciences		—				1,894
Asset based loans		—				1,894
Venture capital/private equity		—				197
SBA and USDA		132				495
Other		—				2
Total commercial loans		4,962				12,128
Real estate loans:
SBA and USDA		481				682
Total real estate loans		481				682
Construction:
SBA and USDA		—				10
Total construction loans		—				10
Credit cards		—				116
Total loans		$	5,443			$	12,936
Credit Quality
The following table summarizes the aging of gross loans, broken out by portfolio segment, at September 30, 2014 and December 31, 2013. See Note 2 to the Consolidated Financial Statements in the Company's Registration Statement for a discussion of credit quality indicators.
(in thousands)		30-Sep-14
		30-59 Days				60-89 Days				90+ Days				Total Loans				Current			Total Loans		Loans 90+  Days
		Past Due				Past Due				Past Due				Past Due									Past Due
																							Still Accruing
Commercial loans:
Technology		$	—			$	—			$	2,627			$	2,627			$	632,281		$	634,908	$	—
Life sciences		—				—				—				—				240,375			240,375		—
Asset-based loans		—				—				—				—				152,282			152,282		—
Venture capital/private equity		—				—				—				—				159,349			159,349		—
SBA and USDA		—				—				—				—				33,245			33,245		—
Other		—				—				—				—				5,468			5,468		—
Total commercial loans		—				—				2,627				2,627				1,223,000			1,225,627		—
Real estate loans:
SBA and USDA		—				415				—				415				31,117			31,532		—
Total real estate loans		—				415				—				415				31,117			31,532		—
Construction loans:
SBA and USDA		—				—				—				—				2,290			2,290		—
Total construction loans		—				—				—				—				2,290			2,290		—
Credit cards		—				—				—				—				19,345			19,345		—
Total loans, gross		$	—			$	415			$	2,627			$	3,042			$	1,275,752		$	1,278,794	$	—
(in thousands)		31-Dec-13
		30-59 Days				60-89 Days				90+ Days				Total Loans				Current			Total Loans		Loans 90+  Days
		Past Due				Past Due				Past Due				Past Due									Past Due
																							Still Accruing
Commercial loans:
Technology		$	411			$	—			$	2,372			$	2,783			$	541,005		$	543,788	$	—
Life sciences		—				—				—				—				224,069			224,069		—
Asset-based loans		—				—				—				—				111,251			111,251		—
Venture capital/private equity		—				—				—				—				143,468			143,468		—
SBA and USDA		—				—				648				648				23,071			23,719		—
Other		—				—				—				—				1,424			1,424		—
Total commercial loans		411				—				3,020				3,431				1,044,288			1,047,719		—
Real estate loans:
SBA and USDA		—				—				1,665				1,665				25,839			27,504		—
Total real estate loans		—				—				1,665				1,665				25,839			27,504		—
Construction loans:
SBA and USDA		—				—				—				—				287			287		—
Total construction loans		—				—				—				—				287			287		—
Credit cards		—				—				95				95				11,480			11,575		—
Total loans, gross		$	411			$	—			$	4,780			$	5,191			$	1,081,894		$	1,087,085	$	—
The following tables summarize impaired loans as they relate to allowance for loan losses, broken out by portfolio segment, at September 30, 2014 and December 31, 2013:
	(in thousands)		30-Sep-14
			Allowance for				Impaired loans  with				Impaired loans  with				Recorded				Total of  unpaid
			loan  losses related				related allowance				no related allowance				investment  in				principal of
			to impaired loans				for loan losses				for loan losses				impaired loans				impaired loans
	Commercial loans:
	Technology		$	7,220			$	10,131			$	296			$	10,427			$	12,784
	Life Sciences		1,107				1,107				—				1,107				2,225
	SBA and USDA		47				264				—				264				387
	Total commercial loans		8,374				11,502				296				11,798				15,396
	Real estate loans:
	SBA and USDA		—				—				—				—				—
	Total real estate loans		—				—				—				—				—
	Total loans, gross		$	8,374			$	11,502			$	296			$	11,798			$	15,396
	(in thousands)		31-Dec-13
			Allowance for				Impaired loans  with				Impaired loans with				Recorded				Total of  unpaid
			loan  losses related				related allowance				no related allowance				investment  in				principal of
			to impaired loans				for loan losses				for loan losses				impaired loans				impaired loans
	Commercial loans:
	Technology		$	4,830			$	12,153			$	—			$	12,153			$	13,745
	SBA and USDA		132				648				—				648				648
	Total commercial loans		4,962				12,801				—				12,801				14,393
	Real estate loans:
	SBA and USDA		481				1,665				—				1,665				1,665
	Total real estate loans		481				1,665				—				1,665				1,665
	Total loans, gross		$	5,443			$	14,466			$	—			$	14,466			$	16,058
The following table summarizes average impaired loans, broken out by portfolio segment, during the three and nine months ended September 30, 2014 and 2013:
	(in thousands)		Three Months Ended September 30,
			2014								2013
			Average  recorded				Interest  income				Average  recorded				Interest  income
			investment in				recognized				investment in				recognized
			impaired loans								impaired loans
	Commercial loans:
	Technology		$	10,427			$	—			$	12,423			$	—
	Life sciences		1,107				—				—				—
	SBA and USDA		265				—				1,031				—
	Total commercial loans		11,799				—				13,454				—
	Real estate loans:
	SBA and USDA		—				—				—				—
	Total real estate loans		—				—				—				—
	Total loans, gross		$	11,799			$	—			$	13,454			$	—
	(in thousands)		Nine Months Ended September 30,
			2014								2013
			Average  recorded				Interest  income				Average  recorded				Interest  income
			investment in				recognized				investment in				recognized
			impaired loans								impaired loans
	Commercial loans:
	Technology		$	8,523			$	—			$	14,517			$	—
	Life sciences		1,285				—				—				—
	SBA and USDA		566				—				589				—
	Total commercial loans		10,374				—				15,106				—
	Real estate loans:
	SBA and USDA		856				—				—				—
	Total real estate loans		856				—				—				—
	Credit cards		3				—				—				—
	Total loans, gross		$	11,233			$	—			$	15,106			$	—
The following table summarizes the credit quality indicators, broken out by portfolio segment, at September 30, 2014 and December 31, 2013:
(in thousands)		30-Sep-14
		Pass				Performing				Impaired				Total
						(Criticized)
Commercial loans:
Technology		$	569,619			$	54,862			$	10,427			$	634,908
Life sciences		228,872				10,396				1,107				240,375
Asset-based loans		124,863				27,419				—				152,282
Venture capital/private equity		159,349				—				—				159,349
SBA and USDA		32,718				263				264				33,245
Other		2,282				3,186				—				5,468
Total commercial loans		1,117,703				96,126				11,798				1,225,627
Real estate loans:
SBA and USDA		24,140				7,392				—				31,532
Total real estate loans		24,140				7,392				—				31,532
Construction loans:
SBA and USDA		2,290				—				—				2,290
Total construction loans		2,290				—				—				2,290
Credit cards		19,345				—				—				19,345
Total loans, gross		$	1,163,478			$	103,518			$	11,798			$	1,278,794
(in thousands)		31-Dec-13
		Pass				Performing				Impaired				Total
						(Criticized)
Commercial loans:
Technology		$	475,531			$	56,104			$	12,153			$	543,788
Life sciences		210,257				13,812				—				224,069
Asset-based loans		110,184				1,067				—				111,251
Venture capital/private equity		143,468				—				—				143,468
SBA and USDA		22,063				1,008				648				23,719
Other		1,424				—				—				1,424
Total commercial loans		962,927				71,991				12,801				1,047,719
Real estate loans:
SBA and USDA		19,852				5,987				1,665				27,504
Total real estate loans		19,852				5,987				1,665				27,504
Construction loans:
SBA and USDA		287				—				—				287
Total construction loans		287				—				—				287
Credit cards		11,575				—				—				11,575
Total loans, gross		$	994,641			$	77,978			$	14,466			$	1,087,085
Troubled debt restructurings (“TDRs”)
Uncollateralized loans are measured for impairment based on the present value of expected future cash flows, discounted at the historical effective interest rate, while all collateral-dependent loans are measured for impairment based on the fair value of the collateral.
The following table summarizes our loans classified as TDRs, broken out by portfolio segment, during the three and nine months ended September 30, 2014:
(dollars in thousands)		Three Months Ended September 30, 2014
		Modifications											TDRs That
													Subsequently Defaulted
		Number of			Pre-Modification				Post-Modification				Number of			Recorded
		Contracts			Outstanding				Outstanding				Contracts			Investment
					Recorded				Recorded
					Investment				Investment
Commercial loans:
Life Sciences		1			$	2,214			$	1,107			—			$	—
Total commercial loans		1			2,214				1,107				—			—
Total loans, gross		1			$	2,214			$	1,107			—			$	—
The loan identified as a TDR during the three and nine months ended September 30, 2014, was restructured to defer interest payments. The loan is considered a nonperforming loan and, as such, was individually considered for allowance for loan losses calculations.
The following table summarizes our loans classified as TDRs, broken out by portfolio segment, during the three and nine months ended September 30, 2013:
(dollars in thousands)		Modifications											TDRs That
													Subsequently Defaulted
		Number of			Pre-Modification				Post-Modification				Number of			Recorded
		Contracts			Outstanding				Outstanding				Contracts			Investment
					Recorded				Recorded
					Investment				Investment
Commercial loans:
Technology		1			$	2,540			$	2,540			—			$	—
Total commercial loans		1			2,540				2,540				—			—
Total loans, gross		1			$	2,540			$	2,540			—			$	—
The loan identified as a TDR during the three and nine months ended September 30, 2013, was restructured to a below market interest rate. The loan is considered a nonperforming loan and, as such, was individually considered for allowance for loan losses calculations.
The Bank currently has no commitments to lend to borrowers with loans identified as TDRs.

Intangible_Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Intangible Assets	'
	INTANGIBLE ASSETS
	The Bank recognizes servicing right intangibles related to obligations to service financial assets. See Note 15 for information about the Company's servicing assets. The Bank acquired certain intangible assets, consisting of non-compete agreements and existing customer relationships, as part of its acquisition of Sand Hill Finance LLC on December 31, 2013. The non-compete agreements and existing customer relationships are finite-lived intangible assets subject to amortization. The non-compete agreements intangible asset has a one-year amortization period and the existing customer relationships intangible asset has a three-year amortization period. The acquired intangible assets do not have renewal or extension provisions.
	The Company's finite-lived intangible assets at September 30, 2014 and December 31, 2013, are as follows:
	(in thousands)	September 30, 2014			December 31, 2013
	Non-compete agreements	$	210		$	210
	Existing customer relationships	590			590
	Total gross carrying amounts	800			800
	Accumulated amortization - non-compete agreements	(157		)	—
	Accumulated amortization - existing customer relationships	(148		)	—
	Total accumulated amortization	(305		)	—
	Total intangible assets subject to amortization, net	$	495		$	800
	Amortization expense, net of tax for the three and nine months ended September 30, 2014, amounted to $62 thousand and $187 thousand, respectively, and is included in other noninterest expense on the accompanying consolidated statements of operations.
	The following table shows the expected amortization for the next five years for intangible assets at September 30, 2014:
	(in thousands)
	2014	$	101
	2015	197
	2016	197
		$	495

Deposits

Deposits	9 Months Ended
	Sep. 30, 2014
Deposits [Abstract]	'
Deposits	'
	DEPOSITS
	Time deposits in denominations of $100,000 or more were approximately $16.2 million and $26.6 million at September 30, 2014 and December 31, 2013, respectively. Interest expense paid on time deposits individually exceeding $100,000 totaled $16 thousand and $46 thousand for the three and nine months ended September 30, 2014, respectively. Interest expense paid on time deposits individually exceeding $100,000 totaled $17 thousand and $45 thousand for the three and nine months ended September 30, 2013, respectively. At September 30, 2014, time deposits scheduled to mature on or before September 30, 2015, totaled $15.2 million.

Repurchase_Agreements_and_Reve

Repurchase Agreements and Reverse Repurchase Agreements	9 Months Ended
	Sep. 30, 2014
Secured Debt, Repurchase and Reverse Repurchase Agreements and Dollar Rolls [Abstract]	'
Repurchase Agreements And Reverse Repurchase Agreements	'
	REPURCHASE AGREEMENTS AND REVERSE REPURCHASE AGREEMENTS
	Securities purchased under agreements to resell generally mature within one to four days from the transaction date. Securities purchased under reverse repurchase agreements, which are included in cash and cash equivalents in the interim consolidated balance sheets, were $10.0 million at September 30, 2014. The Company had no reverse repurchase agreements outstanding at December 31, 2013.
	Securities sold under agreements to repurchase generally mature within one to four days from the transaction date. Securities sold under agreements to repurchase are reflected at the amount of cash received in connection with the transaction. The Company may be required to provide additional collateral based on the fair value of the underlying securities. The Company had no repurchase agreements outstanding at September 30, 2014. Repurchase agreements outstanding at December 31, 2013, were $12.7 million.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Borrowings	'
	BORROWINGS
	The Company may purchase federal funds through unsecured federal funds lines of credit totaling $60.0 million. These lines of credit are intended for short-term borrowings and are subject to restrictions limiting the frequency and terms of advances. These lines of credit are payable on demand and bear interest based upon the daily federal funds rate. The Company also has the ability to utilize short-term borrowings from the Federal Reserve Bank with interest based upon the Federal Reserve US Primary Credit Discount Rate. This $84.4 million line is secured by loans and investment securities. There were no outstanding borrowings for these lines at September 30, 2014 and December 31, 2013.
	In addition, the Company has the ability to borrow longer term from the Federal Home Loan Bank ("FHLB"), with a $199.0 million line of credit available. The rate on these advances varies based on borrowing terms. Advances from this line of credit must be adequately collateralized with securities. There were no outstanding borrowings for this line at September 30, 2014 and December 31, 2013.
	In September 2008, the Company issued $7.4 million of convertible trust preferred securities. These securities were placed through the Trust. The Trust held, as its sole asset, the subordinated debentures issued by the Company. The Company did not consolidate the Trust into its consolidated financial statements. The subordinated debentures issued by the Company amounted to $7.6 million. A debt discount of $1.5 million was recorded and was to be amortized over 30 years. At December 31, 2013, the remaining balance of the subordinated debentures, including respective remaining debt discount of $1.4 million, was $6.2 million. The Company notified the holders of all trust preferred securities of its intent to redeem such securities as of June 30, 2014, and all remaining outstanding trust preferred securities were converted by the holders into shares of Company common stock prior to that date. At September 30, 2014, no convertible trust preferred securities remained outstanding, and the Trust has been dissolved.
	During the nine months ended September 30, 2014, investors converted $7.4 million of the outstanding convertible trust preferred securities into 741,500 common shares at $10.00 per share. For the nine months ended September 30, 2014, interest expense on the trust preferred securities was $215 thousand. For the three and nine months ended September 30, 2013, interest expense on the trust preferred securities was $158 thousand and $475 thousand, respectively.

Equity

Equity	9 Months Ended
	Sep. 30, 2014
Equity [Abstract]	'
Equity	'
	EQUITY
	Preferred Stock
	In December 2008, the Company issued 5,000 shares of Series A, 5% Fixed Rate Cumulative Convertible Preferred Stock. Dividends were paid quarterly, in arrears.
	The preferred stock was convertible into shares of the Company’s common stock at the option of the holder and had a conversion price of $10.00 per share. At December 31, 2013, the Series A convertible preferred stock could be converted into 500,000 shares of common stock of the Company. On April 2, 2014, all shares of preferred stock were converted by the holder into 500,070 shares of common stock.
	Issuances of Common Stock
	During the three and nine months ended September 30, 2014, the Company issued 743 shares and 43,073 shares, respectively, of common stock related to vesting of restricted stock units issued under the Company's stock-based incentive compensation plan, and issued 72,960 shares and 191,690 shares, respectively, of common stock related to the exercise of stock options issued under the stock-based incentive compensation plan.
	During the three and nine months ended September 30, 2014, the Company issued 4,000 shares and 36,000 shares, respectively, of common stock related to the exercise of warrants issued to certain individuals in 2005 in connection with the organization of the Bank.
	On March 31, 2014, the Company sold a total of 3,125,000 shares of Class A common stock in our initial public offering at an initial public offering price of $18.00 and received net proceeds of $51.1 million after expenses. On April 1, 2014, the underwriters exercised in full the underwriters’ purchase option granted in connection with the initial public offering, at the initial public offering price of $18.00, resulting in an additional 468,750 shares purchased from us for which we received $7.9 million in net proceeds on April 4, 2014.
	During the nine months ended September 30, 2014, the Company issued 741,500 common shares of its Class A common stock in connection with the conversion of $7.4 million of our outstanding convertible trust preferred securities into common shares at the conversion price of $10.00 per share. At September 30, 2014, no convertible trust preferred securities remained outstanding.
	Earnings Per Share
	Basic and diluted earnings per share are computed based on the weighted average number of shares outstanding during each period. Diluted earnings per share reflects the potential dilution that could occur if convertible preferred stock, convertible trust preferred securities, stock options or warrants were exercised, resulting in the issuance of common stock that then shared in the net income of the Company.
	Our basic and diluted earnings per common share are calculated as follows:
	(in thousands except per share data)			Three Months Ended								Nine Months Ended
				September 30,								September 30,
				2014				2013				2014				2013
	Basic:
	Net income			$	8,752			$	6,968			$	24,651			$	15,443
	Less:	dividends on preferred stock		—				62				63				188
	Net income attributable to common shares			8,752				6,906				24,588				15,255
	Basic weighted-average common shares outstanding			28,681				23,501				26,931				23,496
	Earnings per share—basic			$	0.31			$	0.29			$	0.91			$	0.65
	Diluted:
	Net income attributable to common shares			$	8,752			$	6,906			$	24,588			$	15,255
	Plus:	dividends on preferred stock		—				—				63				—
		convertible trust preferred securities		—				—				146				—
	Net income attributable to common shares after assumed conversions			8,752				6,906				24,797				15,255
	Basic weighted-average common shares outstanding			28,681				23,501				26,931				23,496
	Effect of dilutive stock options and warrants(1)			1,090				362				1,503				326
	Diluted weighted-average common shares outstanding			29,771				23,863				28,434				23,822
	Earnings per share—diluted			$	0.29			$	0.29			$	0.87			$	0.64
	-1	Excludes anti-dilutive warrants, preferred stock and trust preferred securities representing 1,311,500 shares at September 30, 2013. There were no anti-dilutive warrants, preferred stock and trust preferred securities at September 30, 2014.
	In 2010, in connection with a private placement of Company common stock, the Company issued warrants to purchase 750,000 shares of common stock at any time. The exercise price of the warrants is $5.15 per share. Half of the warrants expire on February 23, 2015. The remainder expire on May 20, 2015. These warrants were valued at $1.8 million using a Black-Scholes-Merton fair value model and are included in additional paid in capital in the accompanying consolidated balance sheet.
	In 2005, the Company's organizers received warrants to purchase one additional share of common stock for every share of common stock purchased. These warrants expire 10 years after issuance. At September 30, 2014 and December 31, 2013, there were 34,000 warrants and 70,000 warrants, respectively, outstanding with an exercise price of $10.00 per share.
	Accumulated Other Comprehensive Income (Loss)
	The Company’s only components of accumulated other comprehensive income (loss) relate to unrealized gains and losses on available for sale securities and their related tax effects. Reclassification adjustments out of accumulated other comprehensive income for the three and nine months ended September 30, 2014 and 2013 are presented in the following table:
	(in thousands)				Three Months Ended September 30,								Nine Months Ended
													September 30,
			Location		2014				2013				2014				2013
	Reclassification adjustment for losses (gains) included in net income		Net (loss) gain on securities		$	231			$	(1,411	)		$	165			$	(2,118	)
	Related tax (expense) benefit		Income tax expense		(86		)		524				(62		)		786
	Other comprehensive income (loss)				$	145			$	(887	)		$	103			$	(1,332	)

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	The Company and its subsidiaries file a consolidated U.S. federal income tax return. The Company is generally no longer subject to the assessment of tax with respect to returns that have been filed for years prior to 2009.
	Realization of the Company’s net deferred tax assets is dependent upon the Company generating sufficient taxable income in future years to obtain a benefit from the reversal of deductible temporary differences and from tax loss carry-forwards. The Company has concluded that, based on expected future results and the future reversals of existing taxable temporary differences, it is more likely than not that its deferred tax assets will be realized, except for a $0.3 million valuation allowance for North Carolina. The Company’s net operating loss carry-forwards will begin to expire in 2029.
	The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more-likely-than-not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority. At September 30, 2014 and December 31, 2013, the Company did not record a liability for uncertain tax positions because no material positions existed.
	The Company classifies tax related interest and penalties as a component of income taxes. Interest and penalties for all periods presented were immaterial.

Regulatory_Matters_and_Restric

Regulatory Matters and Restrictions	9 Months Ended
	Sep. 30, 2014
Regulatory Capital Requirements [Abstract]	'
Regulatory Matters and Restrictions	'
	REGULATORY MATTERS AND RESTRICTIONS
	The Company and the Bank are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the consolidated financial statements. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios, as set forth in the table below. Management believes that at September 30, 2014, the Company and the Bank met all capital requirements to which they are subject and are “well-capitalized”.
	The Bank, as a North Carolina banking corporation, may pay dividends only out of undivided profits as determined pursuant to North Carolina General Statutes Section 53-87. Regulatory authorities may further limit payment of dividends by any bank when it is determined that such a limitation is in the public interest and is necessary to ensure financial soundness of the bank.
	The Company’s actual capital amounts and ratios at September 30, 2014 and December 31, 2013, and the minimum capital requirements, are presented in the following table:
	(dollars in thousands)
		Minimum Requirements to be:
	COMPANY	Actual				Adequately Capitalized				Well Capitalized
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	30-Sep-14
	Total risk-based capital ratio	$	309,000	14.84	%	$	166,620	8	%	$	208,275	10	%
	Tier 1 risk-based capital ratio	285,154		13.69		83,310		4		124,965		6
	Tier 1 leverage ratio	285,154		10.05		113,513		4		141,892		5
	31-Dec-13
	Total risk-based capital ratio	$	217,345	12.46	%	$	139,532	8	%	$	174,415	10	%
	Tier 1 risk-based capital ratio	198,430		11.38		69,766		4		104,649		6
	Tier 1 leverage ratio	198,430		8.34		95,205		4		119,007		5
	The Bank’s actual capital amounts and ratios at September 30, 2014 and December 31, 2013, and the minimum capital requirements, are presented in the following table:
	(dollars in thousands)
		Minimum Requirements to be:
	BANK	Actual				Adequately Capitalized				Well Capitalized
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	30-Sep-14
	Total risk-based capital ratio	$	302,576	14.54	%	$	166,428	8	%	$	208,036	10	%
	Tier 1 risk-based capital ratio	278,730		13.4		83,214		4		124,821		6
	Tier 1 leverage ratio	278,730		9.83		113,400		4		141,750		5
	31-Dec-13
	Total risk-based capital ratio	$	212,821	12.21	%	$	139,385	8	%	$	174,231	10	%
	Tier 1 risk-based capital ratio	193,906		11.13		69,692		4		104,539		6
	Tier 1 leverage ratio	193,906		8.16		95,053		4		118,817		5

Retirement_Plan

Retirement Plan	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Retirement Plan	'
	RETIREMENT PLAN
	The Company approved in January 2006 the establishment of an employee benefit plan (the “Plan”) pursuant to Section 401(k) of the Internal Revenue Code for the benefit of its employees. The Plan includes provisions for discretionary employee contributions, subject to limitation under the Internal Revenue Code. Under the Plan, employees may contribute up to an annual maximum as determined by the Internal Revenue Code. During 2014 and 2013, the Company matched 100% of the first 3% of employee contributions and 50% on contributions between 3-5%. The expense related to the plan for the three and nine months ended September 30, 2014, amounted to $0.2 million and $0.8 million, respectively. The expense related to the plan for the three and nine months ended September 30, 2013, amounted to $0.2 million and $0.6 million, respectively.

Stockbased_Compensation_Plan

Stock-based Compensation Plan	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-based Compensation Plan	'
	STOCK-BASED COMPENSATION PLAN
	The Company maintains a stock-based incentive compensation plan covering certain officers, directors and employees. Grants of options are made by the Compensation Committee of the Board of Directors. Excluding minimal exceptions, all grants must be at no less than fair market value on the date of grant, must be exercised no later than seven years from the date of grant, and may be subject to some vesting provisions. Grants generally vest over five years from the date of grant. The 2009 Stock Incentive Plan, as amended, provides for the issuance of up to 2,820,542 restricted stock units and options to purchase shares of the Company’s stock. At September 30, 2014, 920,119 shares of common stock remained available for future issuance through stock options or restricted stock units.
	The following table presents a rollforward of the Company’s stock options outstanding during the nine months ended September 30, 2014:
						Weighted
						Average
						Remaining
						Contractual
						Life in
		Shares		Weighted Average Exercise Price		Years
	Outstanding at beginning of period	1,394,550		$	6.12	4.24
	Granted	—		—		—
	Exercised	(191,690	)	6.08
	Forfeited	(14,120	)	6
	Outstanding at end of period	1,188,740		$	6.12	3.65
	Options exercisable at period end	801,240		$	6.06	3.58
	The following table provides information for restricted stock units issued under the stock-based incentive compensation plan during the nine months ended September 30, 2014:
		Shares		Weighted
				Average
				Grant Date
				Fair Value
	Nonvested at beginning of period	532,460		$	8.03
	Granted	141,757		14.51
	Vested	(47,855	)	10.7
	Forfeited	(30,804	)	9.8
	Nonvested at end of period	595,558		$	9.26
	The Company’s pre-tax compensation cost for stock-based employee compensation was $0.7 million and $2.4 million for the three and nine months ended September 30, 2014, respectively. The Company’s pre-tax compensation cost for stock-based employee compensation was $0.4 million and $1.1 million for the three and nine months ended September 30, 2013, respectively. At September 30, 2014, there was $4.6 million of unrecognized compensation cost related to non-vested stock-based compensation under this plan to be recognized over five years.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivatives	'
	DERIVATIVES
	The Company receives equity warrants with net settlement terms in connection with extending loan commitments to certain of its customers. These warrants are obtained at the inception of a loan facility or the amendment of a loan facility. These warrants are not obtained in lieu of other fees, interest or payments. These warrants potentially provide an additional return, in addition to the traditional loan yield from interest and fees, in the event of a liquidity event of the borrowing company. We hold these equity warrants for future investment gains, rather than to hedge economic risks. In general, the equity warrants entitle the Company to buy a specific number of shares of the customer’s stock at a specific price over a specific time period. The warrants may also include contingent provisions which provide for additional shares to be purchased at a specific price if defined future events occur, such as future rounds of equity financing by the customer, or upon additional borrowings by the customer. All of the Company’s equity warrants contain net share settlement provisions, which permit the customer to deliver to the Company, upon the Company’s exercise of the warrant, the amount of shares with a current fair value equal to the net gain under the warrant agreement.
	ASC 815 Derivatives and Hedging requires that all derivative instruments be recorded on the balance sheet at fair value. Equity warrants with net share settlement provisions are considered derivatives. Our equity warrants portfolio is primarily comprised of holdings in non-public companies and generally our practice is to monetize our positions as soon as an open market is available. The Bank estimates the initial fair value of non-public company equity warrants using a Black-Scholes option pricing model to approximate fair market value. The model estimates market value for each warrant based on the most recent equity offering at the time of issuance, the warrant specific exercise price, the warrant’s expected life, a risk-free interest rate based on a duration matched U.S. Treasury rate and volatility factors derived from indices of comparable publicly traded companies. On a monthly basis, the Bank adjusts the value of equity warrants in non-public companies using a Black-Scholes model to approximate fair market value based on changes to the risk-free interest rate, the volatility rate and the warrant’s expected life.
	We also hold warrants in public companies. When a private company goes public there is often a lock-up period requiring us to hold our equity position in a publicly traded security until the expiration of the lock-up period. We adjust the value of equity warrants in public companies on a monthly basis based on the month-end closing stock price adjusted for the option value of the warrant. The model estimates market value for each warrant based on the share price as of the evaluation date, the warrant specific exercise price, the warrant’s expected life, a risk-free interest rate based on a duration matched U.S. Treasury rate and uses a company specific volatility factor. See Note 17 for further information regarding the fair value of our equity warrants. Any changes from the grant date in the fair value of equity warrant assets will be recognized as increases or decreases to warrant valuation and as unrealized gains or losses in non-interest income. When a portfolio company completes an initial public offering on a publicly reported market or is acquired, we may exercise these equity warrant assets for shares or cash. Shares received from the exercise of warrants and subject to lock-up agreements are held as equity securities in our available for sale portfolio.
	The grant date fair values of equity warrants received in connection with extending loan commitments are considered to be loan fees and are recognized over the life of the loan commitment as an adjustment to loan yield through loan interest income. At September 30, 2014 and December 31, 2013, unearned income on loans included $1.4 million and $1.2 million, respectively, related to the initial valuation of equity warrant assets. For the three and nine months ended September 30, 2014, we recognized $0.3 million and $0.9 million, respectively, in income from the amortization of loan fees related to the initial valuation of equity warrant assets. For the three and nine months ended September 30, 2013, we recognized $0.3 million and $0.8 million, respectively, in income from the amortization of loan fees related to the initial valuation of equity warrant assets.
	Warrants held, which amounted to $4.1 million and $5.1 million in 451 and 451 companies at September 30, 2014 and December 31, 2013, respectively, are shown as warrant valuation in the accompanying consolidated balance sheets. At September 30, 2014, included in the $4.1 million in equity warrant assets in 451 companies are $0.1 million of equity warrant assets held in five publicly traded companies, which the Company intends to monetize once all restrictions to selling having been removed. At December 31, 2013, included in the $5.1 million in equity warrant assets in 451 companies are $1.0 million of equity warrant assets held in three publicly traded companies, which the Company monetized upon the expiration of all sale restrictions.
	During the three and nine months ended September 30, 2014, the Company exercised warrants with a total value of $1.4 million and $2.8 million, respectively, and received equity securities in six and 10 publicly traded companies, respectively. During the three months ended September 30, 2014, the Company monetized equity securities, which we had obtained in two public companies through the exercise of warrants, for $0.7 million in proceeds. These equity securities had an initial value of $0.9 million and we recognized a loss of $0.2 million. During the nine months ended September 30, 2014, the Company monetized equity securities, which we had obtained in three public companies through the exercise of warrants, for $1.0 million in proceeds. These equity securities had an initial value of $1.2 million and we recognized a loss of $0.2 million. During the three and nine months ended September 30, 2013, the Company monetized warrants and realized a gain of $1.3 million on the exercise of warrants in one portfolio company client that conducted an IPO.
	At September 30, 2014, the fair value of equity securities included in investments obtained through the exercise of warrants and still held was $1.3 million (see Note 3). The Company did not have equity securities obtained from the exercise of warrants in our available for sale portfolio in 2013.
	The following table presents gains and losses on equity warrant exercises and the number of companies on which warrants were exercised, broken out by stage of emerging companies:
	(in thousands except number of companies)	Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Equity warrant assets:
	Gains:
	Early stage	$	167		$	—		$	1,197		$	456
	Expansion stage	350			2,433			1,884			2,915
	Late stage	1,296			—			1,750			672
	Total gains on exercise of equity warrant assets	1,813			2,433			4,831			4,043
	Losses:
	Early stage	—			—			(8		)	—
	Expansion stage	(8		)	—			(2		)	—
	Total losses on exercise of equity warrant assets (1)	(8		)	—			(10		)	—
	Net gains on exercise of equity warrant assets	1,805			2,433			4,821			4,043
	Non-monetized write off of warrant assets	(178		)	(132		)	(354		)	(310		)
	Net realized gains on equity warrants	1,627			2,301			4,467			3,733
	Change in fair value of equity warrant assets	(906		)	(1,402		)	(1,530		)	(470		)
	Warrant income	$	721		$	899		$	2,937		$	3,263
	Number of companies on which warrant gains were realized:
	Early stage	4			—			15			3
	Expansion stage	8			9			25			18
	Late stage	3			—			8			2
	Total number of companies	15			9			48			23
	(1) Realized warrant losses for the three months ended September 30, 2014, related to one early stage company, and for the three and nine months ended September 30, 2014, related to one early stage company and one expansion stage company.

Fair_Value_of_Financial_Assets

Fair Value of Financial Assets and Liabilities	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Assets and Liabilities	'
	FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES
	Fair Value Measurements
	Our marketable investment securities and derivative instruments are financial instruments recorded at fair value on a recurring basis. We make estimates regarding valuation of assets and liabilities measured at fair value in preparing our consolidated financial statements. ASC 825-10 provides an option to report selected financial assets and liabilities at fair value. The Company has not elected to measure any financial assets or liabilities using the fair value option under ASC 825-10.
	ASC 820, Fair Value Measurements and Disclosures defines fair value as the price that would be received to sell an asset or paid to transfer a liability (the “exit price”) in an orderly transaction between market participants at the measurement date. Fair value is a market-based measurement considered from the perspective of a market participant who holds the asset or owes the liability rather than an entity-specific measurement.
	ASC 820 establishes a three-level hierarchy for disclosure of assets and liabilities recorded at fair value. The classification of assets and liabilities within the hierarchy is based on whether the inputs to the valuation methodology used for measurement are observable or unobservable. Observable inputs reflect market-derived or market-based information obtained from independent sources, while unobservable inputs reflect our estimates about market data.
	The three levels for measuring fair value are based on the reliability of inputs and are as follows:
	Level 1	Valuations based on quoted prices in active markets for identical assets or liabilities that we have the ability to access. Valuation adjustments and block discounts are not applied to instruments utilizing Level 1 inputs. Since valuations are based on quoted prices that are readily available in an active market, valuation of these products does not entail a significant degree of judgment. Assets utilizing Level 1 inputs include exchange-traded equity securities.
	Level 2	Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, directly or indirectly. Assets and liabilities utilizing Level 2 inputs include: U.S. treasury and agency securities, mortgage-backed securities, collateralized mortgage obligations, commercial mortgage-backed securities, municipal bonds and notes, Over-the-Counter (“OTC”) derivative instruments (foreign exchange forwards and option contracts, interest rate swaps related to our senior notes, subordinated notes and junior subordinated debentures), and equity warrant assets for shares of public company capital stock.
	Level 3	Valuations based on inputs that are unobservable and significant to the overall fair value measurement. Assets utilizing Level 3 inputs include: limited partnership interests in private equity funds, direct equity investments in private companies, mortgage-backed securities, and equity warrant assets for shares of private company capital stock.
	For inactive markets, there is little information, if any, to evaluate if individual transactions are orderly. Accordingly, we are required to estimate, based upon all available facts and circumstances, the degree to which orderly transactions are occurring. Price quotes based upon transactions that are not orderly are not considered to be determinative of fair value and are given little, if any, weight in measuring fair value. Price quotes based upon transactions that are orderly are considered in determining fair value, with the weight given based upon the facts and circumstances. If sufficient information is not available to determine if price quotes are based upon orderly transactions, less weight is given to the price quote relative to other transactions that are known to be orderly.
	To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment that we use to determine fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes the level in the fair value hierarchy within which the fair value measurement is determined is based on the lowest level input that is significant to the fair value measurement in its entirety.
	Investment securities are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, if available. If quoted market prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions.
	The types of instruments valued based on quoted market prices in active markets include the Company’s U.S. government and agency securities, mortgage-backed securities and asset-backed securities (“ABS”). Such instruments are generally classified within level 1 or level 2 of the fair value hierarchy. As required by ASC 820, the Company does not adjust the quoted price for such instruments.
	Level 3 valuations are for instruments that are not traded in active markets or are subject to transfer restrictions, and may be adjusted to reflect illiquidity and/or non-transferability, with such adjustment generally based on available market evidence. In the absence of such evidence, management’s best estimate is used. Such instruments in this category include some investment securities, all impaired loans, warrants and foreclosed assets.
	Transfers between fair value hierarchy levels would represent assets or liabilities that were previously categorized at a higher level for which the inputs to the estimate became less observable or classified at a lower level for which the inputs became more observable during the period. The Company's policy is to recognize transfers between levels at the end of the period.
	Following is a summary of the valuation techniques used for each class of Level 3 assets:
	(dollars in thousands)	30-Sep-14
		Fair Value			Valuation Technique		Unobservable Input
	Available for sale securities:
	Corporates	$	—		Sensitivity analyses		Indicative pricing
	Non-Agency MBS	132,887			Volatility-driven, multi-dimensional spread tables, optional adjusted spread model and prepayment model		Indicative pricing, collateral performance
	Other ABS	49,008			Multi-dimensional, collateral specific spread tables		Indicative pricing, collateral performance
	Warrants	4,089			Black-Scholes option pricing model		Estimated market price, stated strike prices, option expiration prices, risk-free interest rates, option volatility assumptions
	Servicing asset	1,275			Discounted cash flow		Discount rates, default rates, prepayment rates, servicing costs
	Venture capital fund investments	4,244			Private company equity pricing		Actual and forecasted results, cash position, market comparable companies
	(dollars in thousands)	31-Dec-13
		Fair Value			Valuation Technique		Unobservable Input
	Available for sale securities:
	Corporates	$	26,301		Sensitivity analyses		Indicative pricing
	Non-Agency MBS	52,170			Volatility-driven, multi-dimensional spread tables, optional adjusted spread model and prepayment model		Indicative pricing, collateral performance
	Other ABS	22,091			Multi-dimensional, collateral specific spread tables		Indicative pricing, collateral performance
	Warrants	5,105			Black-Scholes option pricing model		Estimated market price, stated strike prices, option expiration prices, risk-free interest rates, option volatility assumptions
	Servicing asset	1,265			Discounted cash flow		Discount rates, default rates, prepayment rates, servicing costs
	Venture capital fund investments	4,066			Private company equity pricing		Actual and forecasted results, cash position, market comparable companies
	Following are tables that present information about our investment securities, warrants, servicing asset, and venture capital fund investments, measured at fair value on a recurring basis:
	(in thousands)	At September 30, 2014
		Quoted Prices in			Significant Other			Significant			Ending
		Active Markets for			Observable			Unobservable			Balance
		Identical Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)
	Available for sale securities:
	US Treasuries	$	19,662		$	—		$	—		$	19,662
	Agency Direct Obligations	34,647			—			—			34,647
	SBA Pools	—			145,041			—			145,041
	Agency MBS	—			584,038			—			584,038
	Corporates	—			121,025			—			121,025
	Municipal Bonds	—			98,126			—			98,126
	Non-Agency MBS	—			—			132,887			132,887
	Other ABS	—			—			49,008			49,008
	Equity securities	2,453			—			—			2,453
	Total available for sale securities	$	56,762		$	948,230		$	181,895		$	1,186,887
	Warrants	$	—		$	—		$	4,089		$	4,089
	Servicing asset	$	—		$	—		$	1,275		$	1,275
	Venture capital fund investments	$	—		$	—		$	4,244		$	4,244
	(in thousands)	At December 31, 2013
		Quoted Prices in			Significant Other			Significant			Ending
		Active Markets for			Observable			Unobservable			Balance
		Identical Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)
	Available for sale securities:
	Agency Direct Obligations	$	35,061		$	—		$	—		$	35,061
	SBA Pools	—			129,211			—			129,211
	Agency MBS	—			447,850			—			447,850
Corporates	—			119,516			26,301			145,817
Municipal Bonds	—			92,029			—			92,029
Non-Agency MBS	—			—			52,170			52,170
Other ABS	—			—			22,091			22,091
Total available for sale securities	$	35,061		$	788,606		$	100,562		$	924,229
Warrants	$	—		$	—		$	5,105		$	5,105
Servicing asset	$	—		$	—		$	1,265		$	1,265
Venture capital fund investments	$	—		$	—		$	4,066		$	4,066
The following tables present additional information about Level 3 securities, venture capital fund investments, servicing assets and warrants, measured at fair value on a recurring basis:
(dollars in thousands)	Three Months Ended September 30, 2014
	Available for sale securities
	Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
Balance at June 30, 2014	$	6,085		$	85,434		$	34,047		$	4,333		$	1,325		$	4,747		$	135,971
Transfers into Level 3	—			—			—			—			—			—			—
Transfers out of Level 3	(6,085		)	—			—			—			—			(129		)	(6,214		)
Total gains (losses):
included in net income	—			—			—			(261		)	—			721			460
included in other comprehensive income	—			(3,706		)	—			—			—			—			(3,706		)
Purchases, sales, issuances and settlements:
Purchases	—			51,159			24,222			232			—			—			75,613
Sales	—			—			—			—			—			(1,782		)	(1,782		)
Issuances	—			—			—			—			56			532			588
Settlements	—			—			(9,261		)	(60		)	(106		)	—			(9,427		)
Balance at September 30, 2014	$	—		$	132,887		$	49,008		$	4,244		$	1,275		$	4,089		$	191,503
(dollars in thousands)	Three Months Ended September 30, 2013
	Available for sale securities
	Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
Balance at June 30, 2013	$	16,584		$	27,592		$	12,211		$	3,156		$	1,142		$	6,330		$	67,015
Transfers into Level 3	5,138			—			—			—			—			—			5,138
Transfers out of Level 3	—			—			—			—			—			—			—
Total gains (losses):
included in net income	—			—			—			988			(73		)	899			1,814
included in other comprehensive income	—			690			1,130			—			—			—			1,820
Purchases, sales, issuances and settlements:
Purchases	—			17,657			8,979			34			—			—			26,670
Sales	—			—			—			—			—			(2,490		)	(2,490		)
Issuances	—			—			—			—			127			479			606
Settlements	—			—			—			(102		)	—			—			(102		)
Balance at September 30, 2013	$	21,722		$	45,939		$	22,320		$	4,076		$	1,196		$	5,218		$	100,471
(dollars in thousands)	Nine Months Ended September 30, 2014
	Available for sale securities
	Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
Balance at December 31, 2013	$	26,301		$	52,170		$	22,091		$	4,066		$	1,265		$	5,105		$	110,998
Transfers into Level 3	2,994			—			2,762			—			—			—			5,756
Transfers out of Level 3	(29,474		)	—			—			(953		)	—			(1,498		)	(31,925		)
Total gains (losses):
included in net income	—			—			—			1,154			18			2,937			4,109
included in other comprehensive income	179			(8,111		)	(7,058		)	—			—			—			(14,990		)
Purchases, sales, issuances and settlements:
Purchases	—			91,031			40,474			402			—			—			131,907
Sales	—			(2,203		)	—			—			—			(3,582		)	(5,785		)
Issuances	—			—			—			—			166			1,127			1,293
Settlements				—			(9,261		)	(425		)	(174		)	—			(9,860		)
Balance at September 30, 2014	$	—		$	132,887		$	49,008		$	4,244		$	1,275		$	4,089		$	191,503
(dollars in thousands)	Nine Months Ended September 30, 2013
	Available for sale securities
	Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
Balance at December 31, 2012	$	11,715		$	19,016		$	2,643		$	3,303		$	987		$	4,780		$	42,444
Transfers into Level 3	5,501			—			—			—			—			—			5,501
Transfers out of Level 3	—			—			—			—			—			—			—
Total gains (losses):
included in net income	—			—			—			986			(77		)	3,263			4,172
included in other comprehensive income	485			2,185			—			—			—			—			2,670
Purchases, sales, issuances and settlements:
Purchases	4,021			24,738			19,677			328			—			—			48,764
Sales	—			—			—			—			—			(4,224		)	(4,224		)
Issuances	—			—			—			—			286			1,399			1,685
Settlements	—			—			—			(541		)	—			—			(541		)
Balance at September 30, 2013	$	21,722		$	45,939		$	22,320		$	4,076		$	1,196		$	5,218		$	100,471
For the three and nine months ended September 30, 2014, no available for sale securities and two available for sale securities, respectively, were transferred from Level 2 due to lack of observable inputs to substantiate a Level 2 valuation. For the three and nine months ended September 30, 2013, two available for sale securities and eight available for sale securities, respectively, were transferred from Level 2 due to lack of observable inputs to substantiate a Level 2 valuation.
Investments in Entities that Calculate Net Asset Value Per Share
FASB guidance (ASC 825-10-50-6A) requires disclosures about the fair value measurements of investments in certain entities that calculate net asset value per share or its equivalents. These disclosures include the fair value of funds; significant investment strategies of the investees; for investments that cannot be redeemed, estimates of the time periods over which underlying assets are expected to be liquidated; the amounts of the Company's unfunded commitments; redemption features of the investments; restrictions on the ability to sell the investments; and information about sales in certain circumstances.
The Company has investments in venture capital funds that calculate net asset value per share. The Company's investments in venture capital funds generally cannot be redeemed. Alternatively, the Company expects distributions, if any, to be received primarily through M&A activity and IPOs of the underlying assets of the fund. The Company currently does not have any plans to sell any of these fund investments. If the Company decides to sell these investments in the future, generally the investee fund’s management must approve of the buyer before the sale of the investments can be completed. The fair values of the fund investments have been estimated using the net asset value per share of the investments, adjusted for any differences between our measurement date and the date of the fund investment’s net asset value based on the most recently available financial information from the investee general partner. The most recently available financial information is generally as of the end of the previous quarter. For example, the September 30, 2014 financial statements reflect the June 30, 2014 financial information from the investee general partner, adjusted for any contributions paid, distributions received from the investment, and significant fund transactions or market events during the reporting period.
The following tables summarize the estimated fair values of these investments and remaining unfunded commitments for these investments:
(in thousands)	September 30, 2014
	Carrying Value			Fair Value			Unfunded Commitments
Venture capital fund investments	$	4,244		$	4,244		$	2,025
Total	$	4,244		$	4,244		$	2,025
(in thousands)	December 31, 2013
	Carrying Value			Fair Value			Unfunded Commitments
Venture capital fund investments	$	4,066		$	4,066		$	1,006
Total	$	4,066		$	4,066		$	1,006
Venture capital fund investments include investments made by Square 1 Financial, Inc. and Square 1 Bank. These investments represent commitments to venture capital funds that invest in or lend money to primarily U.S. and global technology and life sciences companies and invest in U.S. based venture capital funds themselves. It is estimated that the Company will receive distributions from the fund investments over the next 10 to 13 years, depending on the age of the funds and any potential extensions of terms of the funds.
At September 30, 2014, the $4.2 million venture capital fund investments valuation consisted of $1.3 million of Bank investments primarily for CRA purposes, $1.8 million from Square 1 Ventures, and $0.9 million of holding company investments.
Fair Value of Assets Measured on a Non-recurring Basis
Foreclosed Assets — Upon acquisition, foreclosed assets are initially recorded at the fair value of the asset less cost to sell. Any excess of the recorded investment over the fair value of the property received is charged to the allowance for loan losses. Subsequently, foreclosed assets are carried at the lower of carrying value or net realizable value. Reviews will be performed by management and any subsequent write-downs due to the excess of carrying value of a property over its estimated fair value (less estimated costs to sell) are charged against other expenses. Foreclosed assets are included in other assets in the accompanying consolidated balance sheets.
The following table presents information about our assets measured at fair value on a non-recurring basis:
(in thousands)	Quoted Prices in			Significant Other			Significant			Ending
	Active Markets for			Observable			Unobservable			Balance
	Identical Assets			Inputs			Inputs
	(Level 1)			(Level 2)			(Level 3)
30-Sep-14
Impaired loans	$	—		$	—		$	3,425		$	3,425
31-Dec-13
Foreclosed assets	$	—		$	—		$	119		$	119
Impaired loans	$	—		$	—		$	9,022		$	9,022
Financial Instruments Not Carried at Fair Value
FASB issued guidance over financial instruments (ASC 825-10-65) requires that we disclose estimated fair values for our financial instruments not carried at fair value. Fair value estimates, methods and assumptions, set forth below for our financial instruments, are made solely to comply with the requirements of ASC 825.
Fair values are based on estimates or calculations at the transaction level using present value techniques in instances where quoted market prices are not available. Because broadly traded markets do not exist for many of our financial instruments, the fair value calculations attempt to incorporate the effect of current market conditions at a specific time. Fair valuations are management’s estimates of the values, and they are calculated based on indicator prices corroborated by observable market quotes or pricing models, the economic and competitive environment, the characteristics of the financial instruments, expected losses, and other such factors.
These calculations are subjective in nature, involve uncertainties and matters of significant judgment, and do not include tax ramifications; therefore, the results cannot be determined with precision or substantiated by comparison to independent markets, and they may not be realized in an actual sale or immediate settlement of the instruments. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results. For all of these reasons, the aggregation of the fair value calculations presented herein does not represent, and should not be construed to represent, the underlying value of the Company.
The following describes the methods and assumptions used in estimating the fair values of financial instruments, excluding financial instruments already recorded at fair value as described above.
Cash and due from banks, federal funds sold and short-term investments
The carrying amounts for cash and due from banks, federal funds sold and short-term investments approximate fair value because of the short maturities of those instruments.
Loans
The fair value of the net loan portfolio has been estimated based on management’s assumptions with respect to present value of expected cash flows, discounted at an interest rate giving consideration to estimated prepayment risk and credit loss factors. There is no material difference between carrying value and fair value of loans as outstanding loans are predominately at variable rates.
Investment securities—held to maturity
The fair value of investment securities held to maturity are based on quoted prices in markets that are not active or for which all significant inputs are observable, directly or indirectly.
FHLB stock
The carrying amount of FHLB stock approximates fair value as it is not practicable to determine the fair value due to restrictions placed on its transferability.
Accrued Interest Receivable
The carrying amount of accrued interest receivable approximates fair value due to the short-term nature of the balance.
Deposits
The fair value of deposits with no stated maturities are predominately at variable rates and, accordingly, the fair values have been estimated to equal the carrying amounts (the amount payable on demand). The fair values of certificates of deposits are estimated by discounting the future cash flows using the current rates offered for similar deposits with the same remaining maturities.
Short-term borrowings
The Company’s short-term borrowings include securities sold under repurchase agreements, federal funds purchased and short-term lines of credit. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the borrowing and its contractual maturity.
Long-term debt
The Company’s long-term debt includes the Company’s convertible subordinated debentures. Fair value of long-term debt is estimated by discounting the future cash flows using current rates offered with the same maturities, price indications from reputable dealers or utilizing observable market prices of the underlying instrument, whichever is deemed more reliable.
Financial instruments with off-balance sheet risk
With regard to financial instruments with off-balance sheet risk discussed in Note 16, carrying amounts are reasonable estimates of the fair values for such financial instruments. Commitments to extend credit generally result in loans with a market interest rate if funded.
The following tables present the estimated fair values of our financial instruments that are not carried at fair value:
(in thousands)	30-Sep-14
	Carrying			Quoted Prices in			Significant Other			Significant			Ending
	Value			Active Markets for			Observable			Unobservable			Balance
				Identical Assets			Inputs			Inputs
				(Level 1)			(Level 2)			(Level 3)
Financial assets:
Cash and cash equivalents	$	185,606		$	185,606		$	—		$	—		$	185,606
Investment in time deposits	1,250			1,250			—			—			1,250
Investment securities—held to maturity	278,121			—			276,407			6,750			283,157
Loans, net of unearned income	1,271,457			—			—			1,277,550			1,277,550
FHLB stock	2,091			—			—			2,091			2,091
Accrued interest receivable	10,835			—			—			10,835			10,835
Financial liabilities:
Non-maturity deposits(1)	2,651,938			2,651,938			—			—			2,651,938
Time deposits	16,507			—			16,466			—			16,466
Short-term borrowings	—			—			—			—			—
Long-term debt	—			—			—			—			—
Off-balance sheet financial assets:
Future financing commitments	—			—			—			1,167,115			1,167,115
(1)Includes noninterest demand deposits, interest-bearing demand deposits and money market deposits.
(in thousands)	31-Dec-13
	Carrying			Quoted Prices in			Significant Other			Significant			Ending
	Value			Active Markets for			Observable			Unobservable			Balance
				Identical Assets			Inputs			Inputs
				(Level 1)			(Level 2)			(Level 3)
Financial assets:
Cash and cash equivalents	$	105,730		$	105,730		$	—		$	—		$	105,730
Investment in time deposits	1,250			1,250			—			—			1,250
Investment securities—held to maturity	154,255			—			140,254			6,300			146,554
Loans, net of unearned income	1,082,536			—			—			1,088,062			1,088,062
FHLB stock	2,162			—			—			2,162			2,162
Accrued interest receivable	9,023			—			9,023			—			9,023
Financial liabilities:
Non-maturity deposits(1)	2,079,909			2,046,398			—			—			2,046,398
Time deposits	26,818			—			26,851			—			26,851
Short-term borrowings	—			—			—			—			—
Long-term debt	6,207			—			5,753			—			5,753
Off-balance sheet financial assets:
Future financing commitments	—			—			—			977,262			977,262
(1)Includes noninterest demand deposits, interest-bearing demand deposits and money market deposits.

Offbalance_Sheet_Risk_Commitme

Off-balance Sheet Risk, Commitments & Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Off-balance Sheet Risk, Commitments and Contingencies	'
	OFF-BALANCE SHEET RISK, COMMITMENTS AND CONTINGENCIES
	To meet the financial needs of its customers, the Company is party to financial instruments with off-balance sheet risk in the normal course of business. These financial instruments are comprised of unfunded lines of credit and financial standby letters of credit. These instruments involve, to varying degrees, elements of credit risk in excess of the amounts recognized in the accompanying consolidated balance sheet.
	The Company’s exposure to credit loss in the event of nonperformance by the other party is represented by the contractual amount of these instruments. The Company uses the same credit policies in making these commitments as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the borrower. Collateral held varies but may include cash in deposit accounts, trade accounts receivable, property, plant, and equipment and intellectual property. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.
	At September 30, 2014 and December 31, 2013, unfunded lines of credit were $1.2 billion and $977.3 million, respectively, and outstanding standby letters of credit amounted to $68.2 million and $89.2 million, respectively.
	From time to time, the Company is party, either as a defendant or plaintiff, to lawsuits in the normal course of our business. While any litigation involves an element of uncertainty, management is of the opinion that the liability, if any, resulting from pending legal proceedings will not have a material adverse effect on our financial condition, liquidity or results of operations.

Organization_and_Basis_of_Pres1

Organization and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Accounting, Policy [Policy Text Block]	'
	Basis of Presentation
	These unaudited interim consolidated financial statements have been prepared on a consistent basis with the accounting policies described in the notes to the audited financial statements for the fiscal year ended December 31, 2013 included in the Company's Registration Statement on Form S-1 (File No. 333-193197), which was initially filed with the Securities and Exchange Commission ("SEC") on January 6, 2014, subsequently amended thereafter and declared effective by the SEC on March 26, 2014 (the "Registration Statement"). These unaudited interim consolidated financial statements have also been prepared in accordance with the instructions for Form 10-Q pursuant to the rules and regulations of the SEC, and as such certain footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted. Because the accompanying interim financial statements do not include all of the information and footnotes required by GAAP for annual financial statements, they should be read in conjunction with the audited financial statements for the fiscal year ended December 31, 2013 and notes thereto included in the Registration Statement. Certain prior year amounts have been reclassified to conform to current year presentation.
	The amounts included in these financial statements are unaudited but, in the opinion of management, reflect all adjustments necessary to fairly present the Company’s financial position and results of operations for the interim periods. Unless otherwise noted, all adjustments are normal and recurring in nature. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The results of operations for interim periods are not necessarily indicative of amounts expected for the entire year or future periods.
Consolidation, Policy [Policy Text Block]	'
	Principles of Consolidation
	The consolidated financial statements include the financial statements of Square 1 Financial and its consolidated subsidiaries and other entities in which it has a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation. In addition, the Company evaluates its relationships with other entities to identify whether they are variable interest entities ("VIEs") and to assess whether it is the primary beneficiary of such entities. If the determination was made that the Company is the primary beneficiary, then that entity would be included in the consolidated financial statements. If an entity is not a VIE, the Company also evaluates arrangements in which there is a general partner or managing member to determine whether consolidation is appropriate.
	Square 1 Venture 1, L.P.-The Company owns approximately a 2% partnership interest in Square 1 Venture 1, L.P., which was formed for the primary purpose of sponsoring a fund of funds. The Company has determined that Square 1 Venture 1, L.P. is not a VIE for all periods presented; accordingly, Square 1 Venture 1, L.P. is not consolidated with the Company. The Company accounts for the investment in Square 1 Venture 1, L.P. using the equity method of accounting. For the three and nine months ended September 30, 2014, gains of $0.1 million and $0.8 million, respectively, were recognized. For the three and nine months ended September 30, 2013, gains of $0.2 million were recognized. The fair value of the investment at September 30, 2014 and December 31, 2013, was $1.8 million and $1.0 million, respectively, and is included in other assets on the balance sheet.
Use of Estimates, Policy [Policy Text Block]	'
	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 disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The more significant estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, the valuation of investment securities, recognition and measurement of income tax assets and liabilities and the valuation of equity warrant assets and foreclosed assets.
Cash and Cash Equivalents, Policy [Policy Text Block]	'
	Cash and Cash Equivalents
	Cash and cash equivalents include noninterest-earning and interest-earning deposits at other institutions, federal funds sold and other short term investments. Generally, federal funds are purchased and sold for one-day periods. At times, the Bank places deposits with high credit-quality financial institutions in amounts which may be in excess of federally insured limits. The Bank is required to maintain reserve and clearing balances with the Federal Reserve Bank.

New_Accounting_Standards_Polic

New Accounting Standards (Policies)	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
New Accounting Pronouncements, Policy [Policy Text Block]	'
	In August 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40), Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. ASU 2014-15 requires that in connection with preparing financial statements for each annual and interim reporting period, an entity’s management should evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued (or within one year after the date that the financial statements are available to be issued when applicable). Management’s evaluation should be based on relevant conditions and events that are known and reasonably knowable at the date that the financial statements are issued (or at the date that the financial statements are available to be issued when applicable). ASU 2014-15 also provides principles for considering the mitigating effect of management’s plans, requires certain disclosures when substantial doubt is alleviated as a result of consideration of management’s plans and requires an express statement and other disclosures when substantial doubt is not alleviated. For the Company, ASU 2014-15 is effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early adoption is permitted. The Company does not expect adoption of ASU 2014-15 to have a material effect on its consolidated results of operations, financial position or disclosures.
	In June 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. ASU 2014-11 requires that repurchase-to-maturity transactions be accounted for as secured borrowings consistent with the accounting for other repurchase agreements. In addition, the amendments require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty (a repurchase financing), which will result in secured borrowing accounting for the repurchase agreement. Additionally, the new guidance requires expanded disclosures about transfers accounted for as sales in transactions that are economically similar to repurchase agreements, in which the transferor retains substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction and about the types of collateral pledged in repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions and the tenor of those transactions. For the Company, ASU 2014-11 is effective for the first interim or annual period beginning after December 15, 2014. Early adoption is not permitted for public entities. The Company does not expect adoption of this ASU to have a material effect on its consolidated results of operations or financial position.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The amendments in ASU 2014-09 create Accounting Standards Codification (ASC) Topic 606, Revenue from Contracts with Customers, and supersede the revenue recognition requirements in ASC Topic 605, Revenue Recognition, including most industry-specific revenue recognition guidance. In addition, the amendments create new ASC Subtopic 340-40, Other Assets and Deferred Costs—Contracts with Customers. In summary, the core principle of ASC Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance in ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. Exclusions include lease contracts; insurance contracts; financial instruments and other contractual rights and obligations, such as receivables, investments, liabilities, debt, derivatives, and transfers and servicing; and guarantees other than product and service warranties. In addition, the existing requirements for the recognition of a gain or loss on the transfer of nonfinancial assets that are not in a contract with a customer (for example, assets within the scope of ASC Topic 360, Property, Plant, and Equipment, and intangible assets within the scope of ASC Topic 350, Intangibles-Goodwill and Other) are amended to be consistent with the guidance on recognition and measurement (including the constraint on revenue) in ASU 2014-09. An entity can apply this standard retrospectively to each prior reporting period presented (full retrospective method) or retrospectively with the cumulative effect of initially applying the standard recognized at the date of initial application in retained earnings (simplified transition method). For the Company, the amendments in ASU 2014-09 are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted for public entities. The Company is currently assessing the impacts of adopting ASU 2014-09.
	In April 2014, the FASB issued ASU No. 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The amendments in the ASU change the criteria for reporting discontinued operations. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. Those strategic shifts should have a major effect on the organization’s operations and financial results. Additionally, the new guidance requires expanded disclosures about the assets, liabilities, income, and expenses of discontinued operations and requires disclosure of the pre-tax income attributable to a disposal of a significant part of an organization that does not qualify for discontinued operations reporting. For the Company, ASU No. 2014-08 would be applied prospectively to disposals or classifications as held for sale for annual financial statements with fiscal years beginning on or after December 15, 2014. Early adoption is permitted. The Company does not expect adoption of this ASU to have a material effect on its consolidated results of operations or financial position.
	The FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, to improve the transparency of reporting reclassifications out of accumulated other comprehensive income (OCI) by requiring entities to present in one place information about significant amounts reclassified and, in some cases, to provide cross-references to related footnote disclosures. The amendments do not change the current requirements for reporting net income or OCI in the financial statements, nor do they require new information to be disclosed. The amendments require prospective application and were effective for public entities in reporting periods beginning after December 15, 2012. For nonpublic companies, this revised guidance was effective on a prospective basis for interim and annual periods beginning January 1, 2014. Other than additional disclosures or a change in the presentation on the statement of comprehensive income, this revised guidance did not impact the Company's consolidated results of operations or financial position.
	In June 2013, the FASB issued ASU 2013-08, Financial Services—Investment Companies (ASC Topic 946): Amendments to the Scope, Measurement and Disclosure Requirement. This ASU modifies the guidance in ASC 946 for determining whether an entity is an investment company, as well as the measurement and disclosure requirements for investment companies. The ASU does not change current accounting where a noninvestment company parent retains the specialized accounting applied by an investment company subsidiary in consolidation. ASU 2013-08 has been applied prospectively for all periods beginning after December 15, 2013. This ASU did not have a material effect on the Company's results of operations or financial position.

Investment_Securities_Policies

Investment Securities (Policies)	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment, Policy [Policy Text Block]	'
	Investments in securities are classified into three categories and accounted for as follows:
	Securities Held to Maturity—Debt securities that the Company has the positive intent and ability to hold to maturity are classified as held to maturity and reported at amortized cost; or
	Trading Securities—Debt and equity securities that are bought and held principally for the purpose of selling in the near term are classified as trading securities and reported at fair value, with unrealized gains and losses included in earnings; or
	Securities Available for Sale—Debt and equity securities not classified as either held to maturity securities or trading securities are classified as available for sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported as other comprehensive income, a separate component of shareholders’ equity.
	The Company intends to hold its securities classified as available for sale securities for an indefinite period of time but may sell them prior to maturity. All other securities, which the Company has the positive intent and ability to hold to maturity, are classified as held to maturity securities. The initial classification of securities is determined at the date of purchase. Gains and losses on sales of securities, computed based on specific identification of the adjusted cost of each security, are included in noninterest income at the time of the sales. The Company's investments include agency direct obligations, Small Business Administration ("SBA") pools, agency and non-agency mortgage backed securities ("MBS"), corporate securities, municipal bonds, and asset backed securities ("ABS"). Equity securities include securities obtained from the exercise of equity warrants and required to be held until the expiration of their respective lock-up periods, which expire within one year. The Company intends to monetize these securities upon removal of all sale restrictions (see Note 14).

Loans_and_Allowance_for_Loan_L1

Loans and Allowance for Loan Losses (Policies)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Transfers and Servicing of Financial Assets, Policy [Policy Text Block]	'
	The Company accounts for loan servicing rights or liabilities under Accounting Standards Codification (ASC) 860, “Transfers and Servicing.” ASC requires the Company to recognize a servicing asset or servicing liability each time it undertakes an obligation to service a financial asset. Changes in the fair value of the servicing asset are recognized in other noninterest income. The valuation methodology estimates the present value of future cash flows based on the unique characteristics of the loan, market-based assumptions for prepayment speeds, and discount rate assumptions. The servicing asset is recorded in intangible assets in the financial statements.

Derivatives_Policies

Derivatives (Policies)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivatives, Policy [Policy Text Block]	'
	The Company receives equity warrants with net settlement terms in connection with extending loan commitments to certain of its customers. These warrants are obtained at the inception of a loan facility or the amendment of a loan facility. These warrants are not obtained in lieu of other fees, interest or payments. These warrants potentially provide an additional return, in addition to the traditional loan yield from interest and fees, in the event of a liquidity event of the borrowing company. We hold these equity warrants for future investment gains, rather than to hedge economic risks. In general, the equity warrants entitle the Company to buy a specific number of shares of the customer’s stock at a specific price over a specific time period. The warrants may also include contingent provisions which provide for additional shares to be purchased at a specific price if defined future events occur, such as future rounds of equity financing by the customer, or upon additional borrowings by the customer. All of the Company’s equity warrants contain net share settlement provisions, which permit the customer to deliver to the Company, upon the Company’s exercise of the warrant, the amount of shares with a current fair value equal to the net gain under the warrant agreement.
	ASC 815 Derivatives and Hedging requires that all derivative instruments be recorded on the balance sheet at fair value. Equity warrants with net share settlement provisions are considered derivatives. Our equity warrants portfolio is primarily comprised of holdings in non-public companies and generally our practice is to monetize our positions as soon as an open market is available. The Bank estimates the initial fair value of non-public company equity warrants using a Black-Scholes option pricing model to approximate fair market value. The model estimates market value for each warrant based on the most recent equity offering at the time of issuance, the warrant specific exercise price, the warrant’s expected life, a risk-free interest rate based on a duration matched U.S. Treasury rate and volatility factors derived from indices of comparable publicly traded companies. On a monthly basis, the Bank adjusts the value of equity warrants in non-public companies using a Black-Scholes model to approximate fair market value based on changes to the risk-free interest rate, the volatility rate and the warrant’s expected life.
	We also hold warrants in public companies. When a private company goes public there is often a lock-up period requiring us to hold our equity position in a publicly traded security until the expiration of the lock-up period. We adjust the value of equity warrants in public companies on a monthly basis based on the month-end closing stock price adjusted for the option value of the warrant. The model estimates market value for each warrant based on the share price as of the evaluation date, the warrant specific exercise price, the warrant’s expected life, a risk-free interest rate based on a duration matched U.S. Treasury rate and uses a company specific volatility factor. See Note 17 for further information regarding the fair value of our equity warrants. Any changes from the grant date in the fair value of equity warrant assets will be recognized as increases or decreases to warrant valuation and as unrealized gains or losses in non-interest income. When a portfolio company completes an initial public offering on a publicly reported market or is acquired, we may exercise these equity warrant assets for shares or cash. Shares received from the exercise of warrants and subject to lock-up agreements are held as equity securities in our available for sale portfolio.
	The grant date fair values of equity warrants received in connection with extending loan commitments are considered to be loan fees and are recognized over the life of the loan commitment as an adjustment to loan yield through loan interest income.

Fair_Value_of_Financial_Assets1

Fair Value of Financial Assets and Liabilities (Policies)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement, Policy [Policy Text Block]	'
	Our marketable investment securities and derivative instruments are financial instruments recorded at fair value on a recurring basis. We make estimates regarding valuation of assets and liabilities measured at fair value in preparing our consolidated financial statements. ASC 825-10 provides an option to report selected financial assets and liabilities at fair value. The Company has not elected to measure any financial assets or liabilities using the fair value option under ASC 825-10.
	ASC 820, Fair Value Measurements and Disclosures defines fair value as the price that would be received to sell an asset or paid to transfer a liability (the “exit price”) in an orderly transaction between market participants at the measurement date. Fair value is a market-based measurement considered from the perspective of a market participant who holds the asset or owes the liability rather than an entity-specific measurement.
	ASC 820 establishes a three-level hierarchy for disclosure of assets and liabilities recorded at fair value. The classification of assets and liabilities within the hierarchy is based on whether the inputs to the valuation methodology used for measurement are observable or unobservable. Observable inputs reflect market-derived or market-based information obtained from independent sources, while unobservable inputs reflect our estimates about market data.
	The three levels for measuring fair value are based on the reliability of inputs and are as follows:
	Level 1	Valuations based on quoted prices in active markets for identical assets or liabilities that we have the ability to access. Valuation adjustments and block discounts are not applied to instruments utilizing Level 1 inputs. Since valuations are based on quoted prices that are readily available in an active market, valuation of these products does not entail a significant degree of judgment. Assets utilizing Level 1 inputs include exchange-traded equity securities.
	Level 2	Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, directly or indirectly. Assets and liabilities utilizing Level 2 inputs include: U.S. treasury and agency securities, mortgage-backed securities, collateralized mortgage obligations, commercial mortgage-backed securities, municipal bonds and notes, Over-the-Counter (“OTC”) derivative instruments (foreign exchange forwards and option contracts, interest rate swaps related to our senior notes, subordinated notes and junior subordinated debentures), and equity warrant assets for shares of public company capital stock.
	Level 3	Valuations based on inputs that are unobservable and significant to the overall fair value measurement. Assets utilizing Level 3 inputs include: limited partnership interests in private equity funds, direct equity investments in private companies, mortgage-backed securities, and equity warrant assets for shares of private company capital stock.
	For inactive markets, there is little information, if any, to evaluate if individual transactions are orderly. Accordingly, we are required to estimate, based upon all available facts and circumstances, the degree to which orderly transactions are occurring. Price quotes based upon transactions that are not orderly are not considered to be determinative of fair value and are given little, if any, weight in measuring fair value. Price quotes based upon transactions that are orderly are considered in determining fair value, with the weight given based upon the facts and circumstances. If sufficient information is not available to determine if price quotes are based upon orderly transactions, less weight is given to the price quote relative to other transactions that are known to be orderly.
	To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment that we use to determine fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes the level in the fair value hierarchy within which the fair value measurement is determined is based on the lowest level input that is significant to the fair value measurement in its entirety.
	Investment securities are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, if available. If quoted market prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions.
	The types of instruments valued based on quoted market prices in active markets include the Company’s U.S. government and agency securities, mortgage-backed securities and asset-backed securities (“ABS”). Such instruments are generally classified within level 1 or level 2 of the fair value hierarchy. As required by ASC 820, the Company does not adjust the quoted price for such instruments.
	Level 3 valuations are for instruments that are not traded in active markets or are subject to transfer restrictions, and may be adjusted to reflect illiquidity and/or non-transferability, with such adjustment generally based on available market evidence. In the absence of such evidence, management’s best estimate is used. Such instruments in this category include some investment securities, all impaired loans, warrants and foreclosed assets.
	Transfers between fair value hierarchy levels would represent assets or liabilities that were previously categorized at a higher level for which the inputs to the estimate became less observable or classified at a lower level for which the inputs became more observable during the period. The Company's policy is to recognize transfers between levels at the end of the period.
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Policy Text Block]	'
	FASB guidance (ASC 825-10-50-6A) requires disclosures about the fair value measurements of investments in certain entities that calculate net asset value per share or its equivalents. These disclosures include the fair value of funds; significant investment strategies of the investees; for investments that cannot be redeemed, estimates of the time periods over which underlying assets are expected to be liquidated; the amounts of the Company's unfunded commitments; redemption features of the investments; restrictions on the ability to sell the investments; and information about sales in certain circumstances.
	The Company has investments in venture capital funds that calculate net asset value per share. The Company's investments in venture capital funds generally cannot be redeemed. Alternatively, the Company expects distributions, if any, to be received primarily through M&A activity and IPOs of the underlying assets of the fund. The Company currently does not have any plans to sell any of these fund investments. If the Company decides to sell these investments in the future, generally the investee fund’s management must approve of the buyer before the sale of the investments can be completed. The fair values of the fund investments have been estimated using the net asset value per share of the investments, adjusted for any differences between our measurement date and the date of the fund investment’s net asset value based on the most recently available financial information from the investee general partner. The most recently available financial information is generally as of the end of the previous quarter. For example, the September 30, 2014 financial statements reflect the June 30, 2014 financial information from the investee general partner, adjusted for any contributions paid, distributions received from the investment, and significant fund transactions or market events during the reporting period.
Foreclosed Assets Policy [Policy Text Block]	'
	Foreclosed Assets — Upon acquisition, foreclosed assets are initially recorded at the fair value of the asset less cost to sell. Any excess of the recorded investment over the fair value of the property received is charged to the allowance for loan losses. Subsequently, foreclosed assets are carried at the lower of carrying value or net realizable value. Reviews will be performed by management and any subsequent write-downs due to the excess of carrying value of a property over its estimated fair value (less estimated costs to sell) are charged against other expenses. Foreclosed assets are included in other assets in the accompanying consolidated balance sheets.
Fair Value of Financial Instruments, Policy [Policy Text Block]	'
	Financial Instruments Not Carried at Fair Value
	FASB issued guidance over financial instruments (ASC 825-10-65) requires that we disclose estimated fair values for our financial instruments not carried at fair value. Fair value estimates, methods and assumptions, set forth below for our financial instruments, are made solely to comply with the requirements of ASC 825.
	Fair values are based on estimates or calculations at the transaction level using present value techniques in instances where quoted market prices are not available. Because broadly traded markets do not exist for many of our financial instruments, the fair value calculations attempt to incorporate the effect of current market conditions at a specific time. Fair valuations are management’s estimates of the values, and they are calculated based on indicator prices corroborated by observable market quotes or pricing models, the economic and competitive environment, the characteristics of the financial instruments, expected losses, and other such factors.
	These calculations are subjective in nature, involve uncertainties and matters of significant judgment, and do not include tax ramifications; therefore, the results cannot be determined with precision or substantiated by comparison to independent markets, and they may not be realized in an actual sale or immediate settlement of the instruments. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results. For all of these reasons, the aggregation of the fair value calculations presented herein does not represent, and should not be construed to represent, the underlying value of the Company.
	The following describes the methods and assumptions used in estimating the fair values of financial instruments, excluding financial instruments already recorded at fair value as described above.
	Cash and due from banks, federal funds sold and short-term investments
	The carrying amounts for cash and due from banks, federal funds sold and short-term investments approximate fair value because of the short maturities of those instruments.
	Loans
	The fair value of the net loan portfolio has been estimated based on management’s assumptions with respect to present value of expected cash flows, discounted at an interest rate giving consideration to estimated prepayment risk and credit loss factors. There is no material difference between carrying value and fair value of loans as outstanding loans are predominately at variable rates.
	Investment securities—held to maturity
	The fair value of investment securities held to maturity are based on quoted prices in markets that are not active or for which all significant inputs are observable, directly or indirectly.
	FHLB stock
	The carrying amount of FHLB stock approximates fair value as it is not practicable to determine the fair value due to restrictions placed on its transferability.
	Accrued Interest Receivable
	The carrying amount of accrued interest receivable approximates fair value due to the short-term nature of the balance.
	Deposits
	The fair value of deposits with no stated maturities are predominately at variable rates and, accordingly, the fair values have been estimated to equal the carrying amounts (the amount payable on demand). The fair values of certificates of deposits are estimated by discounting the future cash flows using the current rates offered for similar deposits with the same remaining maturities.
	Short-term borrowings
	The Company’s short-term borrowings include securities sold under repurchase agreements, federal funds purchased and short-term lines of credit. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the borrowing and its contractual maturity.
	Long-term debt
	The Company’s long-term debt includes the Company’s convertible subordinated debentures. Fair value of long-term debt is estimated by discounting the future cash flows using current rates offered with the same maturities, price indications from reputable dealers or utilizing observable market prices of the underlying instrument, whichever is deemed more reliable.
	Financial instruments with off-balance sheet risk
	With regard to financial instruments with off-balance sheet risk discussed in Note 16, carrying amounts are reasonable estimates of the fair values for such financial instruments. Commitments to extend credit generally result in loans with a market interest rate if funded.

Offbalance_Sheet_Risk_Commitme1

Off-balance Sheet Risk, Commitments & Contingencies (Policies)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block]	'
	The Company’s exposure to credit loss in the event of nonperformance by the other party is represented by the contractual amount of these instruments. The Company uses the same credit policies in making these commitments as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the borrower. Collateral held varies but may include cash in deposit accounts, trade accounts receivable, property, plant, and equipment and intellectual property. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Marketable Securities [Table Text Block]	'
	Investment securities at September 30, 2014 and December 31, 2013, are summarized as follows:
	(in thousands)	30-Sep-14
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	Available for sale securities:
	U.S. treasuries	$	19,679	$	—		$	(17	)	$	19,662
	Agency direct obligations	34,534		113			—			34,647
	SBA pools	143,110		1,973			(42		)	145,041
	Agency MBS	577,389		7,747			(1,098		)	584,038
	Municipal bonds	96,402		1,794			(70		)	98,126
	Corporates	116,840		4,217			(32		)	121,025
	Non-agency MBS	132,909		1,278			(1,300		)	132,887
	Other ABS	49,574		90			(656		)	49,008
	Equity securities	2,764		23			(334		)	2,453
	Total	$	1,173,201	$	17,235		$	(3,549	)	$	1,186,887
	Held to maturity securities:
	Agency mortgaged-backed	$	60,663	$	800		$	(264	)	$	61,199
	Municipal bonds	165,531		7,273			(606		)	172,198
	Corporates	51,927		10			(2,177		)	49,760
	Total	$	278,121	$	8,083		$	(3,047	)	$	283,157
	(in thousands)	31-Dec-13
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	Available for sale securities:
	Agency direct obligations	$	34,853	$	208		$	—		$	35,061
	SBA pools	127,309		1,958			(56		)	129,211
	Agency mortgaged-backed	445,855		4,395			(2,400		)	447,850
	Municipal bonds	97,532		—			(5,503		)	92,029
	Corporates	148,288		1,173			(3,644		)	145,817
	Non-agency mortgage-backed securities	54,134		371			(2,335		)	52,170
	Other asset-backed securities	22,787		112			(808		)	22,091
	Total	$	930,758	$	8,217		$	(14,746	)	$	924,229
	Held to maturity securities:
	Agency mortgaged-backed	$	18,666	$	188		$	(608	)	$	18,246
	Municipal bonds	127,339		426			(5,756		)	122,009
	Corporates	8,250		—			(1,951		)	6,299
	Total	$	154,255	$	614		$	(8,315	)	$	146,554
Schedule of Unrealized Loss on Investments [Table Text Block]	'
	The following tables show the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temporarily impaired. Investment securities contained in the table are aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2014 and December 31, 2013:
	(in thousands)	30-Sep-14
		Less Than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
				Losses						Losses					Losses
	Available for sale securities:
	U.S. Treasuries	$	19,662	$	(17	)	$	—		$	—		$	19,662	$	(17	)
	SBA Pools	4,906		(34		)	4,440			(8		)	9,346		(42		)
	Agency MBS	115,807		(801		)	24,197			(297		)	140,004		(1,098		)
	Municipal Bonds	3,780		(7		)	6,390			(63		)	10,170		(70		)
	Corporates	5,013		(32		)	—			—			5,013		(32		)
	Non-Agency MBS	57,578		(476		)	18,888			(824		)	76,466		(1,300		)
	Other ABS	5,306		(8		)	4,819			(648		)	10,125		(656		)
	Equity securities	2,218		(334		)	—			—			2,218		(334		)
	Total	$	214,270	$	(1,709	)	$	58,734		$	(1,840	)	$	273,004	$	(3,549	)
	Held to maturity securities:
	Agency MBS	$	4,970	$	(26	)	$	5,971		$	(238	)	$	10,941	$	(264	)
	Municipal Bonds	11,022		(80		)	22,345			(526		)	33,367		(606		)
	Corporates	39,120		(658		)	6,750			(1,519		)	45,870		(2,177		)
	Total	$	55,112	$	(764	)	$	35,066		$	(2,283	)	$	90,178	$	(3,047	)
	(in thousands)	31-Dec-13
		Less Than 12 Months					12 Months or Greater						Total
		Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
				Losses						Losses					Losses
	Available for sale securities:
	SBA Pools	$	13,724	$	(56	)	$	—		$	—		$	13,724	$	(56	)
	Agency MBS	126,563		(1,801		)	24,288			(599		)	150,851		(2,400		)
	Municipal Bonds	92,029		(5,503		)	—			—			92,029		(5,503		)
	Corporates	72,092		(3,644		)	—			—			72,092		(3,644		)
	Non-Agency MBS	22,422		(410		)	14,138			(1,925		)	36,560		(2,335		)
	Other ABS	—		—			4,852			(808		)	4,852		(808		)
	Total	$	326,830	$	(11,414	)	$	43,278		$	(3,332	)	$	370,108	$	(14,746	)
	Held to maturity securities:
	Agency MBS	$	13,575	$	(608	)	$	—		$	—		$	13,575	$	(608	)
	Municipal Bonds	77,344		(3,313		)	16,368			(2,443		)	93,712		(5,756		)
	Corporates	—		—			6,299			(1,951		)	6,299		(1,951		)
	Total	$	90,919	$	(3,921	)	$	22,667		$	(4,394	)	$	113,586	$	(8,315	)
Investments Classified by Contractual Maturity Date [Table Text Block]	'
	The amortized cost of debt securities at September 30, 2014, by contractual maturity, is shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
	(in thousands)	30-Sep-14
		Total		Less than			After One			After Five			After Ten
		Amortized		One Year			Year to			Years to			Years
		Cost		Amortized			Five Years			Ten Years			Amortized
				Cost			Amortized			Amortized			Cost
							Cost			Cost
	Available for sale securities:
	Contractual maturity
	U.S. Treasuries	$	19,679	$	—		$	19,679		$	—		$	—
	Agency Direct Obligations	34,534		3,890			30,644			—			—
	SBA Pools	143,110		—			5,200			60,428			77,482
	Agency MBS	577,389		—			1,856			35,356			540,177
	Municipal Bonds	96,402		—			—			12,016			84,386
	Corporates	116,840		—			55,687			12,950			48,203
	Non-Agency MBS	132,909		—			1,495			15,316			116,098
	Other ABS	49,574		12,999			15,831			15,277			5,467
	Equity securities	2,764		—			—			—			2,764
	Total	$	1,173,201	$	16,889		$	130,392		$	151,343		$	874,577
	Held to maturity securities:
	Contractual maturity
	Agency MBS	$	60,663	$	—		$	—		$	—		$	60,663
	Municipal Bonds	165,531		—			—			7,460			158,071
	Corporates	51,927		—			—			—			51,927
	Total	$	278,121	$	—		$	—		$	7,460		$	270,661

Loans_and_Allowance_for_Loan_L2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	'
	The composition of loans, net of unearned income, broken out by portfolio segment at September 30, 2014 and December 31, 2013, are as follows:
	(in thousands)		30-Sep-14				31-Dec-13
	Commercial loans:
	Technology		$	634,908			$	543,788
	Life sciences		240,375				224,069
	Asset-based loans		152,282				111,251
	Venture capital/private equity		159,349				143,468
	SBA and USDA		33,245				23,719
	Other		5,468				1,424
	Total commercial loans		1,225,627				1,047,719
	Real estate loans:
	SBA and USDA		31,532				27,504
	Total real estate loans		31,532				27,504
	Construction loans:
	SBA and USDA		2,290				287
	Total construction loans		2,290				287
	Credit cards		19,345				11,575
	Less unearned income, net		(7,337		)		(4,549		)
	Total loans, net of unearned income		$	1,271,457			$	1,082,536
Summary of Activity in the Allowance for Loan Losses [Table Text Block]	'
	The following tables summarize the activity in the allowance for loan losses during the three and nine months ended September 30, 2014 and 2013, broken out by portfolio segment:
	(in thousands)		Three Months Ended September 30, 2014
			Beginning				Charge				Recoveries				Provision				Ending
			Balance				Offs								(Benefit)				Balance
	Commercial loans
	Technology		$	13,380			$	382			$	13			$	3,185			$	16,196
	Life sciences		5,174				1,107				5				(1,063		)		3,009
	Asset-based loans		1,363				—				—				501				1,864
	Venture capital/private equity		143				—				—				71				214
	SBA and USDA		614				—				14				(43		)		585
	Other		11				—				—				(3		)		8
	Total commercial loans		20,685				1,489				32				2,648				21,876
	Real estate loans:
	SBA and USDA		702				—				217				(195		)		724
	Total real estate loans		702				—				217				(195		)		724
	Construction:
	SBA and USDA		19				—				—				4				23
	Total construction loans		19				—				—				4				23
	Credit cards		150				—				—				43				193
	Total loans		$	21,556			$	1,489			$	249			$	2,500			$	22,816
	(in thousands)		Three Months Ended September 30, 2013
			Beginning				Charge				Recoveries				Provision				Ending
			Balance				Offs								(Benefit)				Balance
	Commercial loans
	Technology		$	14,637			$	2,988			$	14			$	1,434			$	13,097
	Life sciences		2,033				—				—				200				2,233
	Asset-based loans		576				—				—				195				771
	Venture capital/private equity		133				—				—				(9		)		124
	SBA and USDA		211				—				—				457				668
	Other		85				—				—				(68		)		17
	Total commercial loans		17,675				2,988				14				2,209				16,910
	Real estate loans:
	SBA and USDA		462				—				—				617				1,079
	Total real estate loans		462				—				—				617				1,079
	Construction:
	SBA and USDA		—				—				—				12				12
	Total construction loans		—				—				—				12				12
	Credit cards		80				—				—				12				92
	Total loans		$	18,217			$	2,988			$	14			$	2,850			$	18,093
	(in thousands)		Nine Months Ended September 30, 2014
			Beginning				Charge				Recoveries				Provision				Ending
			Balance				Offs								(Benefit)				Balance
	Commercial loans
	Technology		$	13,609			$	2,548			$	169			$	4,966			$	16,196
	Life sciences		1,971				1,516				5				2,549				3,009
	Asset based loans		684				—				—				1,180				1,864
	Venture capital/private equity		197				—				—				17				214
	SBA and USDA		627				128				14				72				585
	Other		2				—				—				6				8
	Total commercial loans		17,090				4,192				188				8,790				21,876
	Real estate loans:
	SBA and USDA		1,163				390				217				(266		)		724
	Total real estate loans		1,163				390				217				(266		)		724
	Construction:
	SBA and USDA		10				—				—				13				23
	Total construction loans		10				—				—				13				23
	Credit cards		116				—				—				77				193
	Total loans		$	18,379			$	4,582			$	405			$	8,614			$	22,816
	(in thousands)		Nine Months Ended September 30, 2013
			Beginning				Charge				Recoveries				Provision				Ending
			Balance				Offs								(Benefit)				Balance
	Commercial loans
	Technology		$	10,651			$	5,932			$	692			7,686				$	13,097
Life sciences		804				—				—				1,429				2,233
Asset based loans		1,102				—				—				(331		)		771
Venture capital/private equity		152				—				—				(28		)		124
SBA and USDA		381				—				150				137				668
Other		4				—				—				13				17
Total commercial loans		13,094				5,932				842				8,906				16,910
Real estate loans:
SBA and USDA		680				—				—				399				1,079
Total real estate loans		680				—				—				399				1,079
Construction:
SBA and USDA		—				—				—				12				12
Total construction loans		—				—				—				12				12
Credit cards		69				—				—				23				92
Total loans		$	13,843			$	5,932			$	842			$	9,340			$	18,093
Allowance for Loan Losses Individually and Collectively Evaluated for Impairment [Table Text Block]	'
	The following tables summarize the allowance for loan losses individually and collectively evaluated for impairment at September 30, 2014 and December 31, 2013, broken out by portfolio segment:
	(in thousands)		September 30, 2014
			Ending  Balance:				Ending  Balance:
			Individually				Collectively
			Evaluated for				Evaluated for
			Impairment				Impairment
	Commercial loans
	Technology		$	7,220			$	8,976
	Life sciences		1,107				1,902
	Asset based loans		—				1,864
	Venture capital/private equity		—				214
	SBA and USDA		47				538
	Other		—				8
	Total commercial loans		8,374				13,502
	Real estate loans:
	SBA and USDA		—				724
	Total real estate loans		—				724
	Construction:
	SBA and USDA		—				23
	Total construction loans		—				23
	Credit cards		—				193
	Total loans		$	8,374			$	14,442
	(in thousands)		December 31, 2013
			Ending  Balance:				Ending  Balance:
			Individually				Collectively
			Evaluated for				Evaluated for
			Impairment				Impairment
	Commercial loans
	Technology		$	4,830			$	7,646
	Life sciences		—				1,894
	Asset based loans		—				1,894
	Venture capital/private equity		—				197
	SBA and USDA		132				495
	Other		—				2
	Total commercial loans		4,962				12,128
	Real estate loans:
	SBA and USDA		481				682
	Total real estate loans		481				682
	Construction:
	SBA and USDA		—				10
	Total construction loans		—				10
	Credit cards		—				116
	Total loans		$	5,443			$	12,936
Past Due Financing Receivables [Table Text Block]	'
	The following table summarizes the aging of gross loans, broken out by portfolio segment, at September 30, 2014 and December 31, 2013. See Note 2 to the Consolidated Financial Statements in the Company's Registration Statement for a discussion of credit quality indicators.
	(in thousands)		30-Sep-14
			30-59 Days				60-89 Days				90+ Days				Total Loans				Current			Total Loans		Loans 90+  Days
			Past Due				Past Due				Past Due				Past Due									Past Due
																								Still Accruing
	Commercial loans:
	Technology		$	—			$	—			$	2,627			$	2,627			$	632,281		$	634,908	$	—
	Life sciences		—				—				—				—				240,375			240,375		—
	Asset-based loans		—				—				—				—				152,282			152,282		—
	Venture capital/private equity		—				—				—				—				159,349			159,349		—
	SBA and USDA		—				—				—				—				33,245			33,245		—
	Other		—				—				—				—				5,468			5,468		—
	Total commercial loans		—				—				2,627				2,627				1,223,000			1,225,627		—
	Real estate loans:
	SBA and USDA		—				415				—				415				31,117			31,532		—
	Total real estate loans		—				415				—				415				31,117			31,532		—
	Construction loans:
	SBA and USDA		—				—				—				—				2,290			2,290		—
	Total construction loans		—				—				—				—				2,290			2,290		—
	Credit cards		—				—				—				—				19,345			19,345		—
	Total loans, gross		$	—			$	415			$	2,627			$	3,042			$	1,275,752		$	1,278,794	$	—
	(in thousands)		31-Dec-13
			30-59 Days				60-89 Days				90+ Days				Total Loans				Current			Total Loans		Loans 90+  Days
			Past Due				Past Due				Past Due				Past Due									Past Due
																								Still Accruing
	Commercial loans:
	Technology		$	411			$	—			$	2,372			$	2,783			$	541,005		$	543,788	$	—
	Life sciences		—				—				—				—				224,069			224,069		—
	Asset-based loans		—				—				—				—				111,251			111,251		—
	Venture capital/private equity		—				—				—				—				143,468			143,468		—
	SBA and USDA		—				—				648				648				23,071			23,719		—
	Other		—				—				—				—				1,424			1,424		—
	Total commercial loans		411				—				3,020				3,431				1,044,288			1,047,719		—
	Real estate loans:
	SBA and USDA		—				—				1,665				1,665				25,839			27,504		—
	Total real estate loans		—				—				1,665				1,665				25,839			27,504		—
	Construction loans:
	SBA and USDA		—				—				—				—				287			287		—
	Total construction loans		—				—				—				—				287			287		—
	Credit cards		—				—				95				95				11,480			11,575		—
	Total loans, gross		$	411			$	—			$	4,780			$	5,191			$	1,081,894		$	1,087,085	$	—
Impaired Financing Receivables [Table Text Block]	'
	The following tables summarize impaired loans as they relate to allowance for loan losses, broken out by portfolio segment, at September 30, 2014 and December 31, 2013:
		(in thousands)		30-Sep-14
				Allowance for				Impaired loans  with				Impaired loans  with				Recorded				Total of  unpaid
				loan  losses related				related allowance				no related allowance				investment  in				principal of
				to impaired loans				for loan losses				for loan losses				impaired loans				impaired loans
		Commercial loans:
		Technology		$	7,220			$	10,131			$	296			$	10,427			$	12,784
		Life Sciences		1,107				1,107				—				1,107				2,225
		SBA and USDA		47				264				—				264				387
		Total commercial loans		8,374				11,502				296				11,798				15,396
		Real estate loans:
		SBA and USDA		—				—				—				—				—
		Total real estate loans		—				—				—				—				—
		Total loans, gross		$	8,374			$	11,502			$	296			$	11,798			$	15,396
		(in thousands)		31-Dec-13
				Allowance for				Impaired loans  with				Impaired loans with				Recorded				Total of  unpaid
				loan  losses related				related allowance				no related allowance				investment  in				principal of
				to impaired loans				for loan losses				for loan losses				impaired loans				impaired loans
		Commercial loans:
		Technology		$	4,830			$	12,153			$	—			$	12,153			$	13,745
		SBA and USDA		132				648				—				648				648
		Total commercial loans		4,962				12,801				—				12,801				14,393
		Real estate loans:
		SBA and USDA		481				1,665				—				1,665				1,665
		Total real estate loans		481				1,665				—				1,665				1,665
		Total loans, gross		$	5,443			$	14,466			$	—			$	14,466			$	16,058
Average Impaired Loans By Segment And Class [Table Text Block]	'
	The following table summarizes average impaired loans, broken out by portfolio segment, during the three and nine months ended September 30, 2014 and 2013:
		(in thousands)		Three Months Ended September 30,
				2014								2013
				Average  recorded				Interest  income				Average  recorded				Interest  income
				investment in				recognized				investment in				recognized
				impaired loans								impaired loans
		Commercial loans:
		Technology		$	10,427			$	—			$	12,423			$	—
		Life sciences		1,107				—				—				—
		SBA and USDA		265				—				1,031				—
		Total commercial loans		11,799				—				13,454				—
		Real estate loans:
		SBA and USDA		—				—				—				—
		Total real estate loans		—				—				—				—
		Total loans, gross		$	11,799			$	—			$	13,454			$	—
		(in thousands)		Nine Months Ended September 30,
				2014								2013
				Average  recorded				Interest  income				Average  recorded				Interest  income
				investment in				recognized				investment in				recognized
				impaired loans								impaired loans
		Commercial loans:
		Technology		$	8,523			$	—			$	14,517			$	—
		Life sciences		1,285				—				—				—
		SBA and USDA		566				—				589				—
		Total commercial loans		10,374				—				15,106				—
		Real estate loans:
		SBA and USDA		856				—				—				—
		Total real estate loans		856				—				—				—
		Credit cards		3				—				—				—
		Total loans, gross		$	11,233			$	—			$	15,106			$	—
Financing Receivable Credit Quality Indicators [Table Text Block]	'
	The following table summarizes the credit quality indicators, broken out by portfolio segment, at September 30, 2014 and December 31, 2013:
	(in thousands)		30-Sep-14
			Pass				Performing				Impaired				Total
							(Criticized)
	Commercial loans:
	Technology		$	569,619			$	54,862			$	10,427			$	634,908
	Life sciences		228,872				10,396				1,107				240,375
	Asset-based loans		124,863				27,419				—				152,282
	Venture capital/private equity		159,349				—				—				159,349
	SBA and USDA		32,718				263				264				33,245
	Other		2,282				3,186				—				5,468
	Total commercial loans		1,117,703				96,126				11,798				1,225,627
	Real estate loans:
	SBA and USDA		24,140				7,392				—				31,532
	Total real estate loans		24,140				7,392				—				31,532
	Construction loans:
	SBA and USDA		2,290				—				—				2,290
	Total construction loans		2,290				—				—				2,290
	Credit cards		19,345				—				—				19,345
	Total loans, gross		$	1,163,478			$	103,518			$	11,798			$	1,278,794
	(in thousands)		31-Dec-13
			Pass				Performing				Impaired				Total
							(Criticized)
	Commercial loans:
	Technology		$	475,531			$	56,104			$	12,153			$	543,788
	Life sciences		210,257				13,812				—				224,069
	Asset-based loans		110,184				1,067				—				111,251
	Venture capital/private equity		143,468				—				—				143,468
	SBA and USDA		22,063				1,008				648				23,719
	Other		1,424				—				—				1,424
	Total commercial loans		962,927				71,991				12,801				1,047,719
	Real estate loans:
	SBA and USDA		19,852				5,987				1,665				27,504
	Total real estate loans		19,852				5,987				1,665				27,504
	Construction loans:
	SBA and USDA		287				—				—				287
	Total construction loans		287				—				—				287
	Credit cards		11,575				—				—				11,575
	Total loans, gross		$	994,641			$	77,978			$	14,466			$	1,087,085
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	'
	The following table summarizes our loans classified as TDRs, broken out by portfolio segment, during the three and nine months ended September 30, 2014:
	(dollars in thousands)		Three Months Ended September 30, 2014
			Modifications											TDRs That
														Subsequently Defaulted
			Number of			Pre-Modification				Post-Modification				Number of			Recorded
			Contracts			Outstanding				Outstanding				Contracts			Investment
						Recorded				Recorded
						Investment				Investment
	Commercial loans:
	Life Sciences		1			$	2,214			$	1,107			—			$	—
	Total commercial loans		1			2,214				1,107				—			—
	Total loans, gross		1			$	2,214			$	1,107			—			$	—
	The loan identified as a TDR during the three and nine months ended September 30, 2014, was restructured to defer interest payments. The loan is considered a nonperforming loan and, as such, was individually considered for allowance for loan losses calculations.
	The following table summarizes our loans classified as TDRs, broken out by portfolio segment, during the three and nine months ended September 30, 2013:
	(dollars in thousands)		Modifications											TDRs That
														Subsequently Defaulted
			Number of			Pre-Modification				Post-Modification				Number of			Recorded
			Contracts			Outstanding				Outstanding				Contracts			Investment
						Recorded				Recorded
						Investment				Investment
	Commercial loans:
	Technology		1			$	2,540			$	2,540			—			$	—
	Total commercial loans		1			2,540				2,540				—			—
	Total loans, gross		1			$	2,540			$	2,540			—			$	—
	The loan identified as a TDR during the three and nine months ended September 30, 2013, was restructured to a below market interest rate. The loan is considered a nonperforming loan and, as such, was individually considered for allowance for loan losses calculations.

Intangible_Assets_Tables

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Finite-Lived Intangible Assets [Table Text Block]	'
	The Company's finite-lived intangible assets at September 30, 2014 and December 31, 2013, are as follows:
	(in thousands)	September 30, 2014			December 31, 2013
	Non-compete agreements	$	210		$	210
	Existing customer relationships	590			590
	Total gross carrying amounts	800			800
	Accumulated amortization - non-compete agreements	(157		)	—
	Accumulated amortization - existing customer relationships	(148		)	—
	Total accumulated amortization	(305		)	—
	Total intangible assets subject to amortization, net	$	495		$	800
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	'
	The following table shows the expected amortization for the next five years for intangible assets at September 30, 2014:
	(in thousands)
	2014	$	101
	2015	197
	2016	197
		$	495

Equity_Tables

Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Equity [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	'
	Our basic and diluted earnings per common share are calculated as follows:
	(in thousands except per share data)			Three Months Ended								Nine Months Ended
				September 30,								September 30,
				2014				2013				2014				2013
	Basic:
	Net income			$	8,752			$	6,968			$	24,651			$	15,443
	Less:	dividends on preferred stock		—				62				63				188
	Net income attributable to common shares			8,752				6,906				24,588				15,255
	Basic weighted-average common shares outstanding			28,681				23,501				26,931				23,496
	Earnings per share—basic			$	0.31			$	0.29			$	0.91			$	0.65
	Diluted:
	Net income attributable to common shares			$	8,752			$	6,906			$	24,588			$	15,255
	Plus:	dividends on preferred stock		—				—				63				—
		convertible trust preferred securities		—				—				146				—
	Net income attributable to common shares after assumed conversions			8,752				6,906				24,797				15,255
	Basic weighted-average common shares outstanding			28,681				23,501				26,931				23,496
	Effect of dilutive stock options and warrants(1)			1,090				362				1,503				326
	Diluted weighted-average common shares outstanding			29,771				23,863				28,434				23,822
	Earnings per share—diluted			$	0.29			$	0.29			$	0.87			$	0.64
	-1	Excludes anti-dilutive warrants, preferred stock and trust preferred securities representing 1,311,500 shares at September 30, 2013. There were no anti-dilutive warrants, preferred stock and trust preferred securities at September 30, 2014.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	'
	Reclassification adjustments out of accumulated other comprehensive income for the three and nine months ended September 30, 2014 and 2013 are presented in the following table:
	(in thousands)				Three Months Ended September 30,								Nine Months Ended
													September 30,
			Location		2014				2013				2014				2013
	Reclassification adjustment for losses (gains) included in net income		Net (loss) gain on securities		$	231			$	(1,411	)		$	165			$	(2,118	)
	Related tax (expense) benefit		Income tax expense		(86		)		524				(62		)		786
	Other comprehensive income (loss)				$	145			$	(887	)		$	103			$	(1,332	)

Regulatory_Matters_and_Restric1

Regulatory Matters and Restrictions (Tables)	9 Months Ended
	Sep. 30, 2014
Regulatory Capital Requirements [Abstract]	'
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	'
	The Company’s actual capital amounts and ratios at September 30, 2014 and December 31, 2013, and the minimum capital requirements, are presented in the following table:
	(dollars in thousands)
		Minimum Requirements to be:
	COMPANY	Actual				Adequately Capitalized				Well Capitalized
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	30-Sep-14
	Total risk-based capital ratio	$	309,000	14.84	%	$	166,620	8	%	$	208,275	10	%
	Tier 1 risk-based capital ratio	285,154		13.69		83,310		4		124,965		6
	Tier 1 leverage ratio	285,154		10.05		113,513		4		141,892		5
	31-Dec-13
	Total risk-based capital ratio	$	217,345	12.46	%	$	139,532	8	%	$	174,415	10	%
	Tier 1 risk-based capital ratio	198,430		11.38		69,766		4		104,649		6
	Tier 1 leverage ratio	198,430		8.34		95,205		4		119,007		5
	The Bank’s actual capital amounts and ratios at September 30, 2014 and December 31, 2013, and the minimum capital requirements, are presented in the following table:
	(dollars in thousands)
		Minimum Requirements to be:
	BANK	Actual				Adequately Capitalized				Well Capitalized
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	30-Sep-14
	Total risk-based capital ratio	$	302,576	14.54	%	$	166,428	8	%	$	208,036	10	%
	Tier 1 risk-based capital ratio	278,730		13.4		83,214		4		124,821		6
	Tier 1 leverage ratio	278,730		9.83		113,400		4		141,750		5
	31-Dec-13
	Total risk-based capital ratio	$	212,821	12.21	%	$	139,385	8	%	$	174,231	10	%
	Tier 1 risk-based capital ratio	193,906		11.13		69,692		4		104,539		6
	Tier 1 leverage ratio	193,906		8.16		95,053		4		118,817		5

Stockbased_Compensation_Plan_T

Stock-based Compensation Plan (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
	The following table presents a rollforward of the Company’s stock options outstanding during the nine months ended September 30, 2014:
						Weighted
						Average
						Remaining
						Contractual
						Life in
		Shares		Weighted Average Exercise Price		Years
	Outstanding at beginning of period	1,394,550		$	6.12	4.24
	Granted	—		—		—
	Exercised	(191,690	)	6.08
	Forfeited	(14,120	)	6
	Outstanding at end of period	1,188,740		$	6.12	3.65
	Options exercisable at period end	801,240		$	6.06	3.58
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	'
	The following table provides information for restricted stock units issued under the stock-based incentive compensation plan during the nine months ended September 30, 2014:
		Shares		Weighted
				Average
				Grant Date
				Fair Value
	Nonvested at beginning of period	532,460		$	8.03
	Granted	141,757		14.51
	Vested	(47,855	)	10.7
	Forfeited	(30,804	)	9.8
	Nonvested at end of period	595,558		$	9.26

Derivatives_Tables

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments [Table Text Block]	'
	The following table presents gains and losses on equity warrant exercises and the number of companies on which warrants were exercised, broken out by stage of emerging companies:
	(in thousands except number of companies)	Three Months Ended September 30,						Nine Months Ended September 30,
		2014			2013			2014			2013
	Equity warrant assets:
	Gains:
	Early stage	$	167		$	—		$	1,197		$	456
	Expansion stage	350			2,433			1,884			2,915
	Late stage	1,296			—			1,750			672
	Total gains on exercise of equity warrant assets	1,813			2,433			4,831			4,043
	Losses:
	Early stage	—			—			(8		)	—
	Expansion stage	(8		)	—			(2		)	—
	Total losses on exercise of equity warrant assets (1)	(8		)	—			(10		)	—
	Net gains on exercise of equity warrant assets	1,805			2,433			4,821			4,043
	Non-monetized write off of warrant assets	(178		)	(132		)	(354		)	(310		)
	Net realized gains on equity warrants	1,627			2,301			4,467			3,733
	Change in fair value of equity warrant assets	(906		)	(1,402		)	(1,530		)	(470		)
	Warrant income	$	721		$	899		$	2,937		$	3,263
	Number of companies on which warrant gains were realized:
	Early stage	4			—			15			3
	Expansion stage	8			9			25			18
	Late stage	3			—			8			2
	Total number of companies	15			9			48			23
	(1) Realized warrant losses for the three months ended September 30, 2014, related to one early stage company, and for the three and nine months ended September 30, 2014, related to one early stage company and one expansion stage company.

Fair_Value_of_Financial_Assets2

Fair Value of Financial Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]	'
	Following is a summary of the valuation techniques used for each class of Level 3 assets:
	(dollars in thousands)	30-Sep-14
		Fair Value			Valuation Technique		Unobservable Input
	Available for sale securities:
	Corporates	$	—		Sensitivity analyses		Indicative pricing
	Non-Agency MBS	132,887			Volatility-driven, multi-dimensional spread tables, optional adjusted spread model and prepayment model		Indicative pricing, collateral performance
	Other ABS	49,008			Multi-dimensional, collateral specific spread tables		Indicative pricing, collateral performance
	Warrants	4,089			Black-Scholes option pricing model		Estimated market price, stated strike prices, option expiration prices, risk-free interest rates, option volatility assumptions
	Servicing asset	1,275			Discounted cash flow		Discount rates, default rates, prepayment rates, servicing costs
	Venture capital fund investments	4,244			Private company equity pricing		Actual and forecasted results, cash position, market comparable companies
	(dollars in thousands)	31-Dec-13
		Fair Value			Valuation Technique		Unobservable Input
	Available for sale securities:
	Corporates	$	26,301		Sensitivity analyses		Indicative pricing
	Non-Agency MBS	52,170			Volatility-driven, multi-dimensional spread tables, optional adjusted spread model and prepayment model		Indicative pricing, collateral performance
	Other ABS	22,091			Multi-dimensional, collateral specific spread tables		Indicative pricing, collateral performance
	Warrants	5,105			Black-Scholes option pricing model		Estimated market price, stated strike prices, option expiration prices, risk-free interest rates, option volatility assumptions
	Servicing asset	1,265			Discounted cash flow		Discount rates, default rates, prepayment rates, servicing costs
	Venture capital fund investments	4,066			Private company equity pricing		Actual and forecasted results, cash position, market comparable companies
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	'
	Following are tables that present information about our investment securities, warrants, servicing asset, and venture capital fund investments, measured at fair value on a recurring basis:
	(in thousands)	At September 30, 2014
		Quoted Prices in			Significant Other			Significant			Ending
		Active Markets for			Observable			Unobservable			Balance
		Identical Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)
	Available for sale securities:
	US Treasuries	$	19,662		$	—		$	—		$	19,662
	Agency Direct Obligations	34,647			—			—			34,647
	SBA Pools	—			145,041			—			145,041
	Agency MBS	—			584,038			—			584,038
	Corporates	—			121,025			—			121,025
	Municipal Bonds	—			98,126			—			98,126
	Non-Agency MBS	—			—			132,887			132,887
	Other ABS	—			—			49,008			49,008
	Equity securities	2,453			—			—			2,453
	Total available for sale securities	$	56,762		$	948,230		$	181,895		$	1,186,887
	Warrants	$	—		$	—		$	4,089		$	4,089
	Servicing asset	$	—		$	—		$	1,275		$	1,275
	Venture capital fund investments	$	—		$	—		$	4,244		$	4,244
	(in thousands)	At December 31, 2013
		Quoted Prices in			Significant Other			Significant			Ending
		Active Markets for			Observable			Unobservable			Balance
		Identical Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)
	Available for sale securities:
	Agency Direct Obligations	$	35,061		$	—		$	—		$	35,061
	SBA Pools	—			129,211			—			129,211
	Agency MBS	—			447,850			—			447,850
	Corporates	—			119,516			26,301			145,817
	Municipal Bonds	—			92,029			—			92,029
	Non-Agency MBS	—			—			52,170			52,170
	Other ABS	—			—			22,091			22,091
	Total available for sale securities	$	35,061		$	788,606		$	100,562		$	924,229
	Warrants	$	—		$	—		$	5,105		$	5,105
	Servicing asset	$	—		$	—		$	1,265		$	1,265
	Venture capital fund investments	$	—		$	—		$	4,066		$	4,066
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
	The following tables present additional information about Level 3 securities, venture capital fund investments, servicing assets and warrants, measured at fair value on a recurring basis:
	(dollars in thousands)	Three Months Ended September 30, 2014
		Available for sale securities
		Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
	Balance at June 30, 2014	$	6,085		$	85,434		$	34,047		$	4,333		$	1,325		$	4,747		$	135,971
	Transfers into Level 3	—			—			—			—			—			—			—
	Transfers out of Level 3	(6,085		)	—			—			—			—			(129		)	(6,214		)
	Total gains (losses):
	included in net income	—			—			—			(261		)	—			721			460
	included in other comprehensive income	—			(3,706		)	—			—			—			—			(3,706		)
	Purchases, sales, issuances and settlements:
	Purchases	—			51,159			24,222			232			—			—			75,613
	Sales	—			—			—			—			—			(1,782		)	(1,782		)
	Issuances	—			—			—			—			56			532			588
	Settlements	—			—			(9,261		)	(60		)	(106		)	—			(9,427		)
	Balance at September 30, 2014	$	—		$	132,887		$	49,008		$	4,244		$	1,275		$	4,089		$	191,503
	(dollars in thousands)	Three Months Ended September 30, 2013
		Available for sale securities
		Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
	Balance at June 30, 2013	$	16,584		$	27,592		$	12,211		$	3,156		$	1,142		$	6,330		$	67,015
	Transfers into Level 3	5,138			—			—			—			—			—			5,138
	Transfers out of Level 3	—			—			—			—			—			—			—
	Total gains (losses):
	included in net income	—			—			—			988			(73		)	899			1,814
	included in other comprehensive income	—			690			1,130			—			—			—			1,820
	Purchases, sales, issuances and settlements:
	Purchases	—			17,657			8,979			34			—			—			26,670
	Sales	—			—			—			—			—			(2,490		)	(2,490		)
	Issuances	—			—			—			—			127			479			606
	Settlements	—			—			—			(102		)	—			—			(102		)
	Balance at September 30, 2013	$	21,722		$	45,939		$	22,320		$	4,076		$	1,196		$	5,218		$	100,471
	(dollars in thousands)	Nine Months Ended September 30, 2014
		Available for sale securities
		Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
	Balance at December 31, 2013	$	26,301		$	52,170		$	22,091		$	4,066		$	1,265		$	5,105		$	110,998
	Transfers into Level 3	2,994			—			2,762			—			—			—			5,756
	Transfers out of Level 3	(29,474		)	—			—			(953		)	—			(1,498		)	(31,925		)
	Total gains (losses):
	included in net income	—			—			—			1,154			18			2,937			4,109
	included in other comprehensive income	179			(8,111		)	(7,058		)	—			—			—			(14,990		)
	Purchases, sales, issuances and settlements:
	Purchases	—			91,031			40,474			402			—			—			131,907
	Sales	—			(2,203		)	—			—			—			(3,582		)	(5,785		)
	Issuances	—			—			—			—			166			1,127			1,293
	Settlements				—			(9,261		)	(425		)	(174		)	—			(9,860		)
	Balance at September 30, 2014	$	—		$	132,887		$	49,008		$	4,244		$	1,275		$	4,089		$	191,503
	(dollars in thousands)	Nine Months Ended September 30, 2013
		Available for sale securities
		Corporates			Non-Agency MBS			Other ABS			Venture Capital Fund Investments			Servicing Asset			Warrants			Total
	Balance at December 31, 2012	$	11,715		$	19,016		$	2,643		$	3,303		$	987		$	4,780		$	42,444
	Transfers into Level 3	5,501			—			—			—			—			—			5,501
	Transfers out of Level 3	—			—			—			—			—			—			—
	Total gains (losses):
	included in net income	—			—			—			986			(77		)	3,263			4,172
	included in other comprehensive income	485			2,185			—			—			—			—			2,670
	Purchases, sales, issuances and settlements:
	Purchases	4,021			24,738			19,677			328			—			—			48,764
	Sales	—			—			—			—			—			(4,224		)	(4,224		)
	Issuances	—			—			—			—			286			1,399			1,685
	Settlements	—			—			—			(541		)	—			—			(541		)
	Balance at September 30, 2013	$	21,722		$	45,939		$	22,320		$	4,076		$	1,196		$	5,218		$	100,471
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block]	'
	The following tables summarize the estimated fair values of these investments and remaining unfunded commitments for these investments:
	(in thousands)	September 30, 2014
		Carrying Value			Fair Value			Unfunded Commitments
	Venture capital fund investments	$	4,244		$	4,244		$	2,025
	Total	$	4,244		$	4,244		$	2,025
	(in thousands)	December 31, 2013
		Carrying Value			Fair Value			Unfunded Commitments
	Venture capital fund investments	$	4,066		$	4,066		$	1,006
	Total	$	4,066		$	4,066		$	1,006
Fair Value Measurements, Nonrecurring [Table Text Block]	'
	The following table presents information about our assets measured at fair value on a non-recurring basis:
	(in thousands)	Quoted Prices in			Significant Other			Significant			Ending
		Active Markets for			Observable			Unobservable			Balance
		Identical Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)
	30-Sep-14
	Impaired loans	$	—		$	—		$	3,425		$	3,425
	31-Dec-13
	Foreclosed assets	$	—		$	—		$	119		$	119
	Impaired loans	$	—		$	—		$	9,022		$	9,022
Financial Instruments Not Carried at Fair Value [Table Text Block]	'
	The following tables present the estimated fair values of our financial instruments that are not carried at fair value:
	(in thousands)	30-Sep-14
		Carrying			Quoted Prices in			Significant Other			Significant			Ending
		Value			Active Markets for			Observable			Unobservable			Balance
					Identical Assets			Inputs			Inputs
					(Level 1)			(Level 2)			(Level 3)
	Financial assets:
	Cash and cash equivalents	$	185,606		$	185,606		$	—		$	—		$	185,606
	Investment in time deposits	1,250			1,250			—			—			1,250
	Investment securities—held to maturity	278,121			—			276,407			6,750			283,157
	Loans, net of unearned income	1,271,457			—			—			1,277,550			1,277,550
	FHLB stock	2,091			—			—			2,091			2,091
	Accrued interest receivable	10,835			—			—			10,835			10,835
	Financial liabilities:
	Non-maturity deposits(1)	2,651,938			2,651,938			—			—			2,651,938
	Time deposits	16,507			—			16,466			—			16,466
	Short-term borrowings	—			—			—			—			—
	Long-term debt	—			—			—			—			—
	Off-balance sheet financial assets:
	Future financing commitments	—			—			—			1,167,115			1,167,115
	(1)Includes noninterest demand deposits, interest-bearing demand deposits and money market deposits.
	(in thousands)	31-Dec-13
		Carrying			Quoted Prices in			Significant Other			Significant			Ending
		Value			Active Markets for			Observable			Unobservable			Balance
					Identical Assets			Inputs			Inputs
					(Level 1)			(Level 2)			(Level 3)
	Financial assets:
	Cash and cash equivalents	$	105,730		$	105,730		$	—		$	—		$	105,730
	Investment in time deposits	1,250			1,250			—			—			1,250
	Investment securities—held to maturity	154,255			—			140,254			6,300			146,554
	Loans, net of unearned income	1,082,536			—			—			1,088,062			1,088,062
	FHLB stock	2,162			—			—			2,162			2,162
	Accrued interest receivable	9,023			—			9,023			—			9,023
	Financial liabilities:
	Non-maturity deposits(1)	2,079,909			2,046,398			—			—			2,046,398
	Time deposits	26,818			—			26,851			—			26,851
	Short-term borrowings	—			—			—			—			—
	Long-term debt	6,207			—			5,753			—			5,753
	Off-balance sheet financial assets:
	Future financing commitments	—			—			—			977,262			977,262
	(1)Includes noninterest demand deposits, interest-bearing demand deposits and money market deposits.

Organization_and_Basis_of_Pres2

Organization and Basis of Presentation (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'	'	'	'
Business Combination, Acquired Receivables, Gross Contractual Amount	'	'	'	'	$11.90
Business Combination, Consideration Transferred	'	'	'	'	12.4
Business Combination, Settlement of Preexisting Debt	'	'	'	'	7.2
Income from Equity Method Investment	0.1	0.2	0.8	0.2	'
Fair value of Equity Method Investments	1.8	'	1.8	'	1
Gain on Transfer of Management Contract	'	'	0.5	'	'
Restricted Cash and Cash Equivalents	$15.50	'	$15.50	'	$12

Investment_Securities_Schedule

Investment Securities Schedule of Investment Securities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available for sale securities:	'	'
Amortized Cost	$1,173,201	$930,758
Gross Unrealized Gains	17,235	8,217
Gross Unrealized Losses	-3,549	-14,746
Available-for-sale securities, Fair Value	1,186,887	924,229
Held to maturity securities:	'	'
Amortized Cost	278,121	154,255
Gross Unrealized Gains	8,083	614
Gross Unrealized Losses	-3,047	-8,315
Held to maturity securities, Fair Value	283,157	146,554
US Treasury Securities [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	19,679	'
Gross Unrealized Gains	0	'
Gross Unrealized Losses	-17	'
Available-for-sale securities, Fair Value	19,662	'
Agency direct obligations [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	34,534	34,853
Gross Unrealized Gains	113	208
Gross Unrealized Losses	0	0
Available-for-sale securities, Fair Value	34,647	35,061
SBA pools [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	143,110	127,309
Gross Unrealized Gains	1,973	1,958
Gross Unrealized Losses	-42	-56
Available-for-sale securities, Fair Value	145,041	129,211
Agency MBS [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	577,389	445,855
Gross Unrealized Gains	7,747	4,395
Gross Unrealized Losses	-1,098	-2,400
Available-for-sale securities, Fair Value	584,038	447,850
Held to maturity securities:	'	'
Amortized Cost	60,663	18,666
Gross Unrealized Gains	800	188
Gross Unrealized Losses	-264	-608
Held to maturity securities, Fair Value	61,199	18,246
Municipal bonds [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	96,402	97,532
Gross Unrealized Gains	1,794	0
Gross Unrealized Losses	-70	-5,503
Available-for-sale securities, Fair Value	98,126	92,029
Held to maturity securities:	'	'
Amortized Cost	165,531	127,339
Gross Unrealized Gains	7,273	426
Gross Unrealized Losses	-606	-5,756
Held to maturity securities, Fair Value	172,198	122,009
Corporates [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	116,840	148,288
Gross Unrealized Gains	4,217	1,173
Gross Unrealized Losses	-32	-3,644
Available-for-sale securities, Fair Value	121,025	145,817
Held to maturity securities:	'	'
Amortized Cost	51,927	8,250
Gross Unrealized Gains	10	0
Gross Unrealized Losses	-2,177	-1,951
Held to maturity securities, Fair Value	49,760	6,299
Non-agency MBS [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	132,909	54,134
Gross Unrealized Gains	1,278	371
Gross Unrealized Losses	-1,300	-2,335
Available-for-sale securities, Fair Value	132,887	52,170
Other ABS [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	49,574	22,787
Gross Unrealized Gains	90	112
Gross Unrealized Losses	-656	-808
Available-for-sale securities, Fair Value	49,008	22,091
Equity securities [Member]	'	'
Available for sale securities:	'	'
Amortized Cost	2,764	'
Gross Unrealized Gains	23	'
Gross Unrealized Losses	-334	'
Available-for-sale securities, Fair Value	$2,453	'

Investment_Securities_Schedule1

Investment Securities Schedule of Investments in Continuous Unrealized Loss Position (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	$214,270	$326,830
Less Than 12 Months, Unrealized Losses	-1,709	-11,414
12 Months or Greater, Fair Value	58,734	43,278
12 Months or Greater, Unrealized Losses	-1,840	-3,332
Total, Fair Value	273,004	370,108
Total, Unrealized Losses	-3,549	-14,746
Held to maturity securities:	'	'
Less Than 12 Months, Fair Value	55,112	90,919
Less Than 12 Months, Unrealized Losses	-764	-3,921
12 Months or Greater, Fair Value	35,066	22,667
12 Months or Greater, Unrealized Losses	-2,283	-4,394
Total, Fair Value	90,178	113,586
Total, Unrealized Losses	-3,047	-8,315
US Treasury Securities [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	19,662	'
Less Than 12 Months, Unrealized Losses	-17	'
12 Months or Greater, Fair Value	0	'
12 Months or Greater, Unrealized Losses	0	'
Total, Fair Value	19,662	'
Total, Unrealized Losses	-17	'
SBA pools [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	4,906	13,724
Less Than 12 Months, Unrealized Losses	-34	-56
12 Months or Greater, Fair Value	4,440	0
12 Months or Greater, Unrealized Losses	-8	0
Total, Fair Value	9,346	13,724
Total, Unrealized Losses	-42	-56
Agency MBS [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	115,807	126,563
Less Than 12 Months, Unrealized Losses	-801	-1,801
12 Months or Greater, Fair Value	24,197	24,288
12 Months or Greater, Unrealized Losses	-297	-599
Total, Fair Value	140,004	150,851
Total, Unrealized Losses	-1,098	-2,400
Held to maturity securities:	'	'
Less Than 12 Months, Fair Value	4,970	13,575
Less Than 12 Months, Unrealized Losses	-26	-608
12 Months or Greater, Fair Value	5,971	0
12 Months or Greater, Unrealized Losses	-238	0
Total, Fair Value	10,941	13,575
Total, Unrealized Losses	-264	-608
Municipal bonds [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	3,780	92,029
Less Than 12 Months, Unrealized Losses	-7	-5,503
12 Months or Greater, Fair Value	6,390	0
12 Months or Greater, Unrealized Losses	-63	0
Total, Fair Value	10,170	92,029
Total, Unrealized Losses	-70	-5,503
Held to maturity securities:	'	'
Less Than 12 Months, Fair Value	11,022	77,344
Less Than 12 Months, Unrealized Losses	-80	-3,313
12 Months or Greater, Fair Value	22,345	16,368
12 Months or Greater, Unrealized Losses	-526	-2,443
Total, Fair Value	33,367	93,712
Total, Unrealized Losses	-606	-5,756
Corporates [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	5,013	72,092
Less Than 12 Months, Unrealized Losses	-32	-3,644
12 Months or Greater, Fair Value	0	0
12 Months or Greater, Unrealized Losses	0	0
Total, Fair Value	5,013	72,092
Total, Unrealized Losses	-32	-3,644
Held to maturity securities:	'	'
Less Than 12 Months, Fair Value	39,120	0
Less Than 12 Months, Unrealized Losses	-658	0
12 Months or Greater, Fair Value	6,750	6,299
12 Months or Greater, Unrealized Losses	-1,519	-1,951
Total, Fair Value	45,870	6,299
Total, Unrealized Losses	-2,177	-1,951
Non-agency MBS [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	57,578	22,422
Less Than 12 Months, Unrealized Losses	-476	-410
12 Months or Greater, Fair Value	18,888	14,138
12 Months or Greater, Unrealized Losses	-824	-1,925
Total, Fair Value	76,466	36,560
Total, Unrealized Losses	-1,300	-2,335
Other ABS [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	5,306	0
Less Than 12 Months, Unrealized Losses	-8	0
12 Months or Greater, Fair Value	4,819	4,852
12 Months or Greater, Unrealized Losses	-648	-808
Total, Fair Value	10,125	4,852
Total, Unrealized Losses	-656	-808
Equity securities [Member]	'	'
Available for sale securities:	'	'
Less Than 12 Months, Fair Value	2,218	'
Less Than 12 Months, Unrealized Losses	-334	'
12 Months or Greater, Fair Value	0	'
12 Months or Greater, Unrealized Losses	0	'
Total, Fair Value	2,218	'
Total, Unrealized Losses	($334)	'

Investment_Securities_Investme

Investment Securities Investment Securities Amortized Cost by Contractual Maturity (Details) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Available for sale securities:	'
Total Amortized Cost	$1,173,201
Less than One Year Amortized Cost	16,889
After One Year to Five Years Amortized Cost	130,392
After Five Years to Ten Years Amortized Cost	151,343
After Ten Years Amortized Cost	874,577
Held to maturity securities:	'
Total Amortized Cost	278,121
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	0
After Five Years to Ten Years Amortized Cost	7,460
After Ten Years Amortized Cost	270,661
US Treasury Securities [Member]	'
Available for sale securities:	'
Total Amortized Cost	19,679
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	19,679
After Five Years to Ten Years Amortized Cost	0
After Ten Years Amortized Cost	0
Agency direct obligations [Member]	'
Available for sale securities:	'
Total Amortized Cost	34,534
Less than One Year Amortized Cost	3,890
After One Year to Five Years Amortized Cost	30,644
After Five Years to Ten Years Amortized Cost	0
After Ten Years Amortized Cost	0
SBA pools [Member]	'
Available for sale securities:	'
Total Amortized Cost	143,110
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	5,200
After Five Years to Ten Years Amortized Cost	60,428
After Ten Years Amortized Cost	77,482
Agency MBS [Member]	'
Available for sale securities:	'
Total Amortized Cost	577,389
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	1,856
After Five Years to Ten Years Amortized Cost	35,356
After Ten Years Amortized Cost	540,177
Held to maturity securities:	'
Total Amortized Cost	60,663
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	0
After Five Years to Ten Years Amortized Cost	0
After Ten Years Amortized Cost	60,663
Municipal bonds [Member]	'
Available for sale securities:	'
Total Amortized Cost	96,402
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	0
After Five Years to Ten Years Amortized Cost	12,016
After Ten Years Amortized Cost	84,386
Held to maturity securities:	'
Total Amortized Cost	165,531
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	0
After Five Years to Ten Years Amortized Cost	7,460
After Ten Years Amortized Cost	158,071
Corporates [Member]	'
Available for sale securities:	'
Total Amortized Cost	116,840
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	55,687
After Five Years to Ten Years Amortized Cost	12,950
After Ten Years Amortized Cost	48,203
Held to maturity securities:	'
Total Amortized Cost	51,927
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	0
After Five Years to Ten Years Amortized Cost	0
After Ten Years Amortized Cost	51,927
Non-agency MBS [Member]	'
Available for sale securities:	'
Total Amortized Cost	132,909
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	1,495
After Five Years to Ten Years Amortized Cost	15,316
After Ten Years Amortized Cost	116,098
Other ABS [Member]	'
Available for sale securities:	'
Total Amortized Cost	49,574
Less than One Year Amortized Cost	12,999
After One Year to Five Years Amortized Cost	15,831
After Five Years to Ten Years Amortized Cost	15,277
After Ten Years Amortized Cost	5,467
Equity securities [Member]	'
Available for sale securities:	'
Total Amortized Cost	2,764
Less than One Year Amortized Cost	0
After One Year to Five Years Amortized Cost	0
After Five Years to Ten Years Amortized Cost	0
After Ten Years Amortized Cost	$2,764

Investment_Securities_Narrativ

Investment Securities Narrative (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Investments [Line Items]	'	'	'	'
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value	'	$297,000,000	'	$343,700,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	'	74	'	104
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	'	26	'	25
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Period Increase (Decrease)	800,000	43,000	1,500,000	'
Equity Securities from Warrant Exercises [Member]	'	'	'	'
Schedule of Investments [Line Items]	'	'	'	'
Available-for-sale securities, Fair Value	'	1,300,000	'	'
Other Security Investments [Member]	'	'	'	'
Schedule of Investments [Line Items]	'	'	'	'
Available-for-sale securities, Fair Value	'	$1,100,000	'	'

Loans_and_Allowance_for_Loan_L3

Loans and Allowance for Loan Losses Schedule of Composition of Loans by Portfolio Segment (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commercial loans:	'	'
Commercial loans, gross	$1,225,627	$1,047,719
Real estate loans:	'	'
Real estate loans, gross	31,532	27,504
Construction loans:	'	'
Construction loans, gross	2,290	287
Credit cards	19,345	11,575
Less unearned income, net	-7,337	-4,549
Loans, net of unearned income	1,271,457	1,082,536
Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	1,225,627	1,047,719
Real estate loans [Member]	'	'
Real estate loans:	'	'
Real estate loans, gross	31,532	27,504
Construction loans [Member]	'	'
Construction loans:	'	'
Construction loans, gross	2,290	287
Credit cards [Member]	'	'
Construction loans:	'	'
Credit cards	19,345	11,575
Technology [Member] | Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	634,908	543,788
Life sciences [Member] | Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	240,375	224,069
Asset based loans [Member] | Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	152,282	111,251
Venture capital/private equity [Member] | Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	159,349	143,468
SBA and USDA [Member] | Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	33,245	23,719
SBA and USDA [Member] | Real estate loans [Member]	'	'
Real estate loans:	'	'
Real estate loans, gross	31,532	27,504
SBA and USDA [Member] | Construction loans [Member]	'	'
Construction loans:	'	'
Construction loans, gross	2,290	287
Other [Member] | Commercial loans [Member]	'	'
Commercial loans:	'	'
Commercial loans, gross	$5,468	$1,424

Loans_and_Allowance_for_Loan_L4

Loans and Allowance for Loan Losses Schedule of Allowance for Loan Losses Activity (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	$21,556	$18,217	$18,379	$13,843
Charge Offs	1,489	2,988	4,582	5,932
Recoveries	249	14	405	842
Provision (Benefit)	2,500	2,850	8,614	9,340
Ending Balance	22,816	18,093	22,816	18,093
Commercial loans [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	20,685	17,675	17,090	13,094
Charge Offs	1,489	2,988	4,192	5,932
Recoveries	32	14	188	842
Provision (Benefit)	2,648	2,209	8,790	8,906
Ending Balance	21,876	16,910	21,876	16,910
Commercial loans [Member] | Technology [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	13,380	14,637	13,609	10,651
Charge Offs	382	2,988	2,548	5,932
Recoveries	13	14	169	692
Provision (Benefit)	3,185	1,434	4,966	7,686
Ending Balance	16,196	13,097	16,196	13,097
Commercial loans [Member] | Life sciences [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	5,174	2,033	1,971	804
Charge Offs	1,107	0	1,516	0
Recoveries	5	0	5	0
Provision (Benefit)	-1,063	200	2,549	1,429
Ending Balance	3,009	2,233	3,009	2,233
Commercial loans [Member] | Asset based loans [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	1,363	576	684	1,102
Charge Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	501	195	1,180	-331
Ending Balance	1,864	771	1,864	771
Commercial loans [Member] | Venture capital/private equity [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	143	133	197	152
Charge Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	71	-9	17	-28
Ending Balance	214	124	214	124
Commercial loans [Member] | SBA and USDA [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	614	211	627	381
Charge Offs	0	0	128	0
Recoveries	14	0	14	150
Provision (Benefit)	-43	457	72	137
Ending Balance	585	668	585	668
Commercial loans [Member] | Other [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	11	85	2	4
Charge Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	-3	-68	6	13
Ending Balance	8	17	8	17
Real estate loans [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	702	462	1,163	680
Charge Offs	0	0	390	0
Recoveries	217	0	217	0
Provision (Benefit)	-195	617	-266	399
Ending Balance	724	1,079	724	1,079
Real estate loans [Member] | SBA and USDA [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	702	462	1,163	680
Charge Offs	0	0	390	0
Recoveries	217	0	217	0
Provision (Benefit)	-195	617	-266	399
Ending Balance	724	1,079	724	1,079
Construction loans [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	19	0	10	0
Charge Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	4	12	13	12
Ending Balance	23	12	23	12
Construction loans [Member] | SBA and USDA [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	19	0	10	0
Charge Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	4	12	13	12
Ending Balance	23	12	23	12
Credit cards [Member]	'	'	'	'
Allowance for Loan Losses [Roll Forward]	'	'	'	'
Beginning Balance	150	80	116	69
Charge Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	43	12	77	23
Ending Balance	$193	$92	$193	$92

Loans_and_Allowance_for_Loan_L5

Loans and Allowance for Loan Losses Schedule of Loan Losses Individually and Collectively Evaluated for Impairment (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	$8,374	$5,443
Ending Balance: Collectively Evaluated for Impairment	14,442	12,936
Commercial loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	8,374	4,962
Ending Balance: Collectively Evaluated for Impairment	13,502	12,128
Commercial loans [Member] | Technology [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	7,220	4,830
Ending Balance: Collectively Evaluated for Impairment	8,976	7,646
Commercial loans [Member] | Life sciences [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	1,107	0
Ending Balance: Collectively Evaluated for Impairment	1,902	1,894
Commercial loans [Member] | Asset based loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	0
Ending Balance: Collectively Evaluated for Impairment	1,864	1,894
Commercial loans [Member] | Venture capital/private equity [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	0
Ending Balance: Collectively Evaluated for Impairment	214	197
Commercial loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	47	132
Ending Balance: Collectively Evaluated for Impairment	538	495
Commercial loans [Member] | Other [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	0
Ending Balance: Collectively Evaluated for Impairment	8	2
Real estate loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	481
Ending Balance: Collectively Evaluated for Impairment	724	682
Real estate loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	481
Ending Balance: Collectively Evaluated for Impairment	724	682
Construction loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	0
Ending Balance: Collectively Evaluated for Impairment	23	10
Construction loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	0
Ending Balance: Collectively Evaluated for Impairment	23	10
Credit cards [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Ending Balance: Individually Evaluated for Impairment	0	0
Ending Balance: Collectively Evaluated for Impairment	$193	$116

Loans_and_Allowance_for_Loan_L6

Loans and Allowance for Loan Losses Schedule of Aging of Gross Loans, Broken Out by Portfolio Segment (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	$0	$411
60-89 Days Past Due	415	0
Equal to Greater than 90 Days Past Due	2,627	4,780
Total Loans Past Due	3,042	5,191
Current	1,275,752	1,081,894
Commercial loans, gross	1,225,627	1,047,719
Real estate loans, gross	31,532	27,504
Construction loans, gross	2,290	287
Credit cards	19,345	11,575
Total Loans	1,278,794	1,087,085
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	411
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	2,627	3,020
Total Loans Past Due	2,627	3,431
Current	1,223,000	1,044,288
Commercial loans, gross	1,225,627	1,047,719
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member] | Technology [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	411
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	2,627	2,372
Total Loans Past Due	2,627	2,783
Current	632,281	541,005
Commercial loans, gross	634,908	543,788
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member] | Life sciences [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	0
Total Loans Past Due	0	0
Current	240,375	224,069
Commercial loans, gross	240,375	224,069
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member] | Asset based loans [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	0
Total Loans Past Due	0	0
Current	152,282	111,251
Commercial loans, gross	152,282	111,251
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member] | Venture capital/private equity [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	0
Total Loans Past Due	0	0
Current	159,349	143,468
Commercial loans, gross	159,349	143,468
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	648
Total Loans Past Due	0	648
Current	33,245	23,071
Commercial loans, gross	33,245	23,719
Loans Greater than 90 Days Past Due Still Accruing	0	0
Commercial loans [Member] | Other [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	0
Total Loans Past Due	0	0
Current	5,468	1,424
Commercial loans, gross	5,468	1,424
Loans Greater than 90 Days Past Due Still Accruing	0	0
Real estate loans [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	415	0
Equal to Greater than 90 Days Past Due	0	1,665
Total Loans Past Due	415	1,665
Current	31,117	25,839
Real estate loans, gross	31,532	27,504
Loans Greater than 90 Days Past Due Still Accruing	0	0
Real estate loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	415	0
Equal to Greater than 90 Days Past Due	0	1,665
Total Loans Past Due	415	1,665
Current	31,117	25,839
Real estate loans, gross	31,532	27,504
Loans Greater than 90 Days Past Due Still Accruing	0	0
Construction loans [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	0
Total Loans Past Due	0	0
Current	2,290	287
Construction loans, gross	2,290	287
Loans Greater than 90 Days Past Due Still Accruing	0	0
Construction loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	0
Total Loans Past Due	0	0
Current	2,290	287
Construction loans, gross	2,290	287
Loans Greater than 90 Days Past Due Still Accruing	0	0
Credit cards [Member]	'	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Equal to Greater than 90 Days Past Due	0	95
Total Loans Past Due	0	95
Current	19,345	11,480
Credit cards	19,345	11,575
Loans Greater than 90 Days Past Due Still Accruing	$0	$0

Loans_and_Allowance_for_Loan_L7

Loans and Allowance for Loan Losses Schedule of Impaired Loans as they Relate to Allowance for Loan Losses (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	$8,374	$5,443
Impaired loans with related allowance for loan losses	11,502	14,466
Impaired loans with no related allowance for loan losses	296	0
Recorded investment in impaired loans	11,798	14,466
Total of unpaid principal of impaired loans	15,396	16,058
Commercial loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	8,374	4,962
Impaired loans with related allowance for loan losses	11,502	12,801
Impaired loans with no related allowance for loan losses	296	0
Recorded investment in impaired loans	11,798	12,801
Total of unpaid principal of impaired loans	15,396	14,393
Commercial loans [Member] | Technology [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	7,220	4,830
Impaired loans with related allowance for loan losses	10,131	12,153
Impaired loans with no related allowance for loan losses	296	0
Recorded investment in impaired loans	10,427	12,153
Total of unpaid principal of impaired loans	12,784	13,745
Commercial loans [Member] | Life sciences [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	1,107	'
Impaired loans with related allowance for loan losses	1,107	'
Impaired loans with no related allowance for loan losses	0	'
Recorded investment in impaired loans	1,107	'
Total of unpaid principal of impaired loans	2,225	'
Commercial loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	47	132
Impaired loans with related allowance for loan losses	264	648
Impaired loans with no related allowance for loan losses	0	0
Recorded investment in impaired loans	264	648
Total of unpaid principal of impaired loans	387	648
Real estate loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	0	481
Impaired loans with related allowance for loan losses	0	1,665
Impaired loans with no related allowance for loan losses	0	0
Recorded investment in impaired loans	0	1,665
Total of unpaid principal of impaired loans	0	1,665
Real estate loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Allowance for loan losses related to impaired loans	0	481
Impaired loans with related allowance for loan losses	0	1,665
Impaired loans with no related allowance for loan losses	0	0
Recorded investment in impaired loans	0	1,665
Total of unpaid principal of impaired loans	$0	$1,665

Loans_and_Allowance_for_Loan_L8

Loans and Allowance for Loan Losses Schedule of Average Impaired Loans by Portfolio Segment (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	$11,799	$13,454	$11,233	$15,106
Interest income recognized	0	0	0	0
Commercial loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	11,799	13,454	10,374	15,106
Interest income recognized	0	0	0	0
Commercial loans [Member] | Technology [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	10,427	12,423	8,523	14,517
Interest income recognized	0	0	0	0
Commercial loans [Member] | Life sciences [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	1,107	0	1,285	0
Interest income recognized	0	0	0	0
Commercial loans [Member] | SBA and USDA [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	265	1,031	566	589
Interest income recognized	0	0	0	0
Real estate loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	0	0	856	0
Interest income recognized	0	0	0	0
Real estate loans [Member] | SBA and USDA [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	0	0	856	0
Interest income recognized	0	0	0	0
Credit cards [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average recorded investment in impaired loans	'	'	3	0
Interest income recognized	'	'	$0	$0

Loans_and_Allowance_for_Loan_L9

Loans and Allowance for Loan Losses Schedule of Credit Quality Indicators (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	$1,278,794	$1,087,085
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	1,163,478	994,641
Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	103,518	77,978
Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	11,798	14,466
Commercial loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	1,225,627	1,047,719
Commercial loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	1,117,703	962,927
Commercial loans [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	96,126	71,991
Commercial loans [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	11,798	12,801
Commercial loans [Member] | Technology [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	634,908	543,788
Commercial loans [Member] | Technology [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	569,619	475,531
Commercial loans [Member] | Technology [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	54,862	56,104
Commercial loans [Member] | Technology [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	10,427	12,153
Commercial loans [Member] | Life sciences [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	240,375	224,069
Commercial loans [Member] | Life sciences [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	228,872	210,257
Commercial loans [Member] | Life sciences [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	10,396	13,812
Commercial loans [Member] | Life sciences [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	1,107	0
Commercial loans [Member] | Asset based loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	152,282	111,251
Commercial loans [Member] | Asset based loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	124,863	110,184
Commercial loans [Member] | Asset based loans [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	27,419	1,067
Commercial loans [Member] | Asset based loans [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Commercial loans [Member] | Venture capital/private equity [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	159,349	143,468
Commercial loans [Member] | Venture capital/private equity [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	159,349	143,468
Commercial loans [Member] | Venture capital/private equity [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Commercial loans [Member] | Venture capital/private equity [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Commercial loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	33,245	23,719
Commercial loans [Member] | SBA and USDA [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	32,718	22,063
Commercial loans [Member] | SBA and USDA [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	263	1,008
Commercial loans [Member] | SBA and USDA [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	264	648
Commercial loans [Member] | Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	5,468	1,424
Commercial loans [Member] | Other [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,282	1,424
Commercial loans [Member] | Other [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	3,186	0
Commercial loans [Member] | Other [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Real estate loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	31,532	27,504
Real estate loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	24,140	19,852
Real estate loans [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	7,392	5,987
Real estate loans [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	1,665
Real estate loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	31,532	27,504
Real estate loans [Member] | SBA and USDA [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	24,140	19,852
Real estate loans [Member] | SBA and USDA [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	7,392	5,987
Real estate loans [Member] | SBA and USDA [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	1,665
Construction loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,290	287
Construction loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,290	287
Construction loans [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Construction loans [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Construction loans [Member] | SBA and USDA [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,290	287
Construction loans [Member] | SBA and USDA [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,290	287
Construction loans [Member] | SBA and USDA [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Construction loans [Member] | SBA and USDA [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Credit cards [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	19,345	11,575
Credit cards [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	19,345	11,575
Credit cards [Member] | Performing Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	0	0
Credit cards [Member] | Impaired [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	$0	$0

Recovered_Sheet1

Loans and Allowance for Loan Losses Schedule of Troubled Debt Restructurings (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$2,214	$2,540
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,107	2,540
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Commercial loans [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	2,214	2,540
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,107	2,540
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Commercial loans [Member] | Technology [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	'	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	'	2,540
Financing Receivable, Modifications, Post-Modification Recorded Investment	'	2,540
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	'	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	'	0
Commercial loans [Member] | Life sciences [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Number of Contracts	1	'
Financing Receivable, Modifications, Pre-Modification Recorded Investment	2,214	'
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,107	'
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$0	'

Recovered_Sheet2

Loans and Allowance for Loan Losses Narrative (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Related party loan commitments, number of commitments	1	'	3
Related party loan commitments	$7,500,000	'	$7,500,000
SBA and USDA [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Outstanding customer balance on SBA and USDA loans sold	126,100,000	'	114,600,000
Number of SBA/USDA guaranteed portion loans sold	8	21	'
Outstanding sold balance of loans	$59,300,000	'	$63,100,000

Intangible_Assets_Schedule_of_

Intangible Assets Schedule of Finite-Lived Intangible Assets (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross carrying amount	$800	$800
Accumulated amortization	-305	0
Total intangible assets subject to amortization, net	495	800
Non-compete agreements [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross carrying amount	210	210
Accumulated amortization	-157	0
Existing customer relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross carrying amount	590	590
Accumulated amortization	($148)	$0

Intangible_Assets_Schedule_of_1

Intangible Assets Schedule of Finite-Lived Intangible Assets Expected Amortization (Details) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
2014	$101
2015	197
2016	197
Total	$495

Intangible_Assets_Narrative_De

Intangible Assets Narrative (Details) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization expense	$62	$187
Non-compete agreements [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-Lived Intangible Asset, Useful Life	'	'1 year
Existing customer relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-Lived Intangible Asset, Useful Life	'	'3 years

Deposits_Details

Deposits (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Time Deposits, $100,000 or More [Abstract]	'	'	'	'	'
Time Deposits, $100,000 or More	$16,200,000	'	$16,200,000	'	$26,600,000
Interest Expense, Time Deposits, $100,000 or More	16,000	17,000	46,000	45,000	'
Time Deposit Maturities, Next Twelve Months	$15,200,000	'	$15,200,000	'	'

Repurchase_Agreements_and_Reve1

Repurchase Agreements and Reverse Repurchase Agreements (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed [Abstract]	'	'
Securities Purchased under Agreements to Resell	$10,000,000	'
Disclosure of Repurchase Agreements [Abstract]	'	'
Repurchase agreements outstanding	$0	$12,737,000

Borrowings_Details

Borrowings (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Subordinated Borrowings [Abstract]	'	'	'	'
Subordinated debentures original amount	'	'	'	$7,600,000
Subordinated debentures, original unamortized discount	'	'	'	1,500,000
Convertible trust preferred securities, conversion price per share	'	$10	'	'
Subordinated debentures, unamortized discount, net	'	'	'	-1,400,000
Subordinated debentures, net	'	'	'	6,200,000
Convertible Trust Preferred Securities Converted to Other Securities	'	7,400,000	'	'
Interest Expense, Trust Preferred Securities	158,000	215,000	475,000	'
Unsecured Debt [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Line of Credit Facility, Current Borrowing Capacity	'	60,000,000	'	'
Federal Reserve Bank Advances [Member] | Secured Debt [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Line of Credit Facility, Current Borrowing Capacity	'	84,400,000	'	'
Federal Home Loan Bank Advances [Member] | Secured Debt [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	'	$199,000,000	'	'
Common Stock [Member]	'	'	'	'
Subordinated Borrowings [Abstract]	'	'	'	'
Conversion of trust preferred securities, common shares issued	'	741,500	'	'

Equity_Narrative_Details

Equity Narrative (Details) (USD $)

9 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Employee Stock Option [Member]

Convertible Preferred Stock [Member]

Convertible Preferred Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

IPO [Member]

IPO [Member]

Underwriter's Purchase Option [Member]

2004 Warrants [Member]

2004 Warrants [Member]

2004 Warrants [Member]

2010 Warrants [Member]

Class of Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible preferred stock, shares issued and outstanding

0

'

5,000

'

'

5,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Dividend Rate, Percentage

'

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common shares issued upon conversion of preferred stock

'

'

'

'

'

'

500,070

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures

'

'

'

'

'

'

'

'

743

43,073

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

'

'

'

191,690

'

'

'

'

'

'

72,960

191,690

'

'

'

'

'

'

'

Conversion of trust preferred securities, common shares issued

'

'

'

'

'

'

741,500

'

'

'

'

'

'

'

'

'

'

'

'

Convertible Trust Preferred Securities Converted to Other Securities

$7,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock (shares)

'

'

'

'

'

'

'

'

'

'

'

'

3,125,000

'

468,750

4,000

36,000

'

'

Sale of Stock, Price Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

$18

'

'

'

'

'

Proceeds from issuance of common stock, net of issuance costs

65,004,000

-1,000

'

'

'

'

'

'

'

'

'

'

51,100,000

'

7,900,000

'

'

'

'

Convertible trust preferred securities, conversion price per share

$10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares Of Company Stock Purchasable From Warrants Issued

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

750,000

Class of Warrant or Right, Number of Securities Called by Warrants or Rights

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

34,000

34,000

70,000

'

Warrants and Rights Outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,800,000

Convertible Preferred Stock, Shares Subject to Conversion

'

'

'

'

'

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

Convertible Preferred Stock, Conversion Price Per Share

'

'

'

'

$10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Warrant Exercise Price Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$10

$5.15

Warrant Exercise Price Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$10

$10

'

'

Equity_Earnings_Per_Share_Deta

Equity Earnings Per Share (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Equity [Abstract]	'		'		'		'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	'		'		'		1,311,500
Basic:	'		'		'		'
Net income	$8,752		$6,968		$24,651		$15,443
Dividends on preferred stock	0		62		63		188
Net income available to common shareholders	8,752		6,906		24,588		15,255
Basic weighted-average common shares outstanding	28,681		23,501		26,931		23,496
Earnings per share—basic	$0.31		$0.29		$0.91		$0.65
Diluted:	'		'		'		'
Net income available to common shareholders	8,752		6,906		24,588		15,255
Dividends on preferred stock	0		0		63		0
Convertible trust preferred securities	0		0		146		0
Net Income (Loss) Available to Common Stockholders, Diluted	$8,752		$6,906		$24,797		$15,255
Basic weighted-average common shares outstanding	28,681		23,501		26,931		23,496
Effect of dilutive stock options and warrants(1)	1,090	[1]	362	[1]	1,503	[1]	326	[1]
Diluted weighted-average common shares outstanding	29,771		23,863		28,434		23,822
Earnings per share—diluted	$0.29		$0.29		$0.87		$0.64
[1]	Excludes anti-dilutive warrants, preferred stock and trust preferred securities representing 1,311,500 shares at September 30, 2013. There were no anti-dilutive warrants, preferred stock and trust preferred securities at September 30, 2014.

Equity_Accumulated_Comprehensi

Equity Accumulated Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Reclassification adjustment for losses (gains) included in net income	$231	($1,411)	$165	($2,118)
Related tax (expense) benefit	-86	524	-62	786
Other comprehensive income (loss)	$145	($887)	$103	($1,332)

Income_Taxes_Details

Income Taxes (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]	'
Deferred Tax Assets, Valuation Allowance	$0.30

Regulatory_Matters_and_Restric2

Regulatory Matters and Restrictions (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Company [Member]	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total risk-based capital ratio, Actual, Amount	$309,000	$217,345
Total risk-based capital ratio, Actual, Ratio	14.84%	12.46%
Total risk-based capital ratio, Adequately Capitalized, Amount	166,620	139,532
Total risk-based capital ratio, Adequately Capitalized, Ratio	8.00%	8.00%
Total risk-based capital ratio, Well Capitalized, Amount	208,275	174,415
Total risk-based capital ratio, Well Capitalized, Ratio	10.00%	10.00%
Tier 1 risk-based capital ratio, Actual, Amount	285,154	198,430
Tier 1 risk-based capital ratio, Actual, Ratio	13.69%	11.38%
Tier 1 risk-based capital ratio, Adequately Capitalized, Amount	83,310	69,766
Tier 1 risk-based capital ratio, Adequately Capitalized, Ratio	4.00%	4.00%
Tier 1 risk-based capital, Well Capitalized, Amount	124,965	104,649
Tier 1 risk-based capital ratio, Well Capitalized, Ratio	6.00%	6.00%
Tier 1 leverage ratio, Actual, Amount	285,154	198,430
Tier 1 leverage ratio, Actual, Ratio	10.05%	8.34%
Tier 1 leverage ratio, Adequately Capitalized, Amount	113,513	95,205
Tier 1 leverage ratio, Adequately Capitalized, Ratio	4.00%	4.00%
Tier 1 leverage ratio, Well Capitalized, Amount	141,892	119,007
Tier 1 leverage ratio, Well Capitalized, Ratio	5.00%	5.00%
Bank [Member]	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total risk-based capital ratio, Actual, Amount	302,576	212,821
Total risk-based capital ratio, Actual, Ratio	14.54%	12.21%
Total risk-based capital ratio, Adequately Capitalized, Amount	166,428	139,385
Total risk-based capital ratio, Adequately Capitalized, Ratio	8.00%	8.00%
Total risk-based capital ratio, Well Capitalized, Amount	208,036	174,231
Total risk-based capital ratio, Well Capitalized, Ratio	10.00%	10.00%
Tier 1 risk-based capital ratio, Actual, Amount	278,730	193,906
Tier 1 risk-based capital ratio, Actual, Ratio	13.40%	11.13%
Tier 1 risk-based capital ratio, Adequately Capitalized, Amount	83,214	69,692
Tier 1 risk-based capital ratio, Adequately Capitalized, Ratio	4.00%	4.00%
Tier 1 risk-based capital, Well Capitalized, Amount	124,821	104,539
Tier 1 risk-based capital ratio, Well Capitalized, Ratio	6.00%	6.00%
Tier 1 leverage ratio, Actual, Amount	278,730	193,906
Tier 1 leverage ratio, Actual, Ratio	9.83%	8.16%
Tier 1 leverage ratio, Adequately Capitalized, Amount	113,400	95,053
Tier 1 leverage ratio, Adequately Capitalized, Ratio	4.00%	4.00%
Tier 1 leverage ratio, Well Capitalized, Amount	$141,750	$118,817
Tier 1 leverage ratio, Well Capitalized, Ratio	5.00%	5.00%

Retirement_Plan_Details

Retirement Plan (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Contribution Plan Disclosure [Line Items]	'	'	'	'
Defined Contribution Plan, Cost Recognized	$0.20	$0.20	$0.80	$0.60
First 3% of Employee Contribution [Member]	'	'	'	'
Defined Contribution Plan Disclosure [Line Items]	'	'	'	'
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	'	'	100.00%	'
3-5% Employee Contribution [Member]	'	'	'	'
Defined Contribution Plan Disclosure [Line Items]	'	'	'	'
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	'	'	50.00%	'

Stockbased_Compensation_Plan_S

Stock-based Compensation Plan Stock Options (Details) (Employee Stock Option [Member], USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Employee Stock Option [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Outstanding at beginning of period, Shares	1,394,550	'
Granted, Shares	0	'
Exercised, Shares	-191,690	'
Forfeited, Shares	-14,120	'
Outstanding at end of period, Shares	1,188,740	1,394,550
Options exercisable at period end, Shares	801,240	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]	'	'
Outstanding at beginning of period, Weighted Average Exercise Price	$6.12	'
Granted, Weighted Average Exercise Price	$0	'
Exercised, Weighted Average Exercise Price	$6.08	'
Forfeited, Weighted Average Exercise Price	$6	'
Outstanding at end of period, Weighted Average Exercise Price	$6.12	$6.12
Options exercisable at period end, Weighted Average Exercise Price	$6.06	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'
Outstanding at beginning of period, Weighted Average Remaining Contractual Life in Years	'3 years 7 months 24 days	'4 years 2 months 26 days
Outstanding at end of period, Weighted Average Remaining Contractual Life in Years	'3 years 7 months 24 days	'4 years 2 months 26 days
Options exercisable at period end, Weighted Average Remaining Contractual Life in Years	'3 years 6 months 29 days	'

Stockbased_Compensation_Plan_R

Stock-based Compensation Plan Restricted Stock Units (Details) (Restricted Stock Units (RSUs) [Member], USD $)	9 Months Ended
	Sep. 30, 2014
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'
Nonvested at beginning of period	532,460
Granted	141,757
Vested	-47,855
Forfeited	-30,804
Nonvested at end of period	595,558
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]	'
Nonvested at beginning of period, Weighted Average Grant Date Fair Value	$8.03
Granted, Weighted Average Grant Date Fair Value	$14.51
Vested, Weighted Average Grant Date Fair Value	$10.70
Forfeited, Weighted Average Grant Date Fair Value	$9.80
Nonvested at end of period, Weighted Average Grant Date Fair Value	$9.26

Stockbased_Compensation_Plan_N

Stock-based Compensation Plan Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'	'
Number of shares authorized under the 2009 Stock Incentive Plan, as amended	2,820,542	'	2,820,542	'
Number of shares available for future issuance under the 2009 Stock Incentive Plan, as amended	920,119	'	920,119	'
Grant expiration period from date of grant under the 2009 Stock Incentive Plan, as amended	'	'	'7 years 0 months 0 days	'
Grant vesting period from date of grant under the 2009 Stock Incentive Plan, as amended	'	'	'5 years 0 months 0 days	'
Allocated Share-based Compensation Expense	$0.70	$0.40	$2.40	$1.10
Unrecognized compensation cost related to non-vested stock-based compensation under 2009 Stock Incentive Plan, as amended	$4.60	'	$4.60	'
Period for recognition of unrecognized compensation cost for 2009 Stock Incentive Plan, as amended	'	'	'5 years 0 months 0 days	'

Derivatives_Narrative_Details

Derivatives Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Derivative [Line Items]	'	'	'	'	'
Unearned income on loans	$7,337,000	'	$7,337,000	'	$4,549,000
Available-for-sale securities, Fair Value	1,186,887,000	'	1,186,887,000	'	924,229,000
Equity Securities from Warrant Exercises [Member]	'	'	'	'	'
Derivative [Line Items]	'	'	'	'	'
Available-for-sale Securities, Equity Securities	1,300,000	'	1,300,000	'	'
Public Company [Member] | Equity Securities from Warrant Exercises [Member]	'	'	'	'	'
Derivative [Line Items]	'	'	'	'	'
Value Of Warrants Exercised For Equity Securities	900,000	'	1,200,000	'	'
Monetized Equity Securities Obtained From Warrant Exercises, Number Of Companies	2	1	3	1	'
Net gains on exercise of equity warrant assets	'	1,300,000	'	1,300,000	'
Monetized amount of equity security received from warrant exercise	700,000	'	1,000,000	'	'
Available-for-sale Securities, Gross Realized Losses	200,000	'	200,000	'	'
Warrant [Member]	'	'	'	'	'
Derivative [Line Items]	'	'	'	'	'
Unearned income on loans	1,400,000	'	1,400,000	'	1,200,000
Amortization of loan fees	300,000	300,000	900,000	800,000	'
Warrant valuation in warrants held	4,100,000	'	4,100,000	'	5,100,000
Value of warrants exercised for equity securities subject to lock-up	1,400,000	'	2,800,000	'	'
Number of companies in which warrants are held	451	'	451	'	451
Number of companies in which warrant gains were realized	15	9	48	23	'
Net gains on exercise of equity warrant assets	1,805,000	2,433,000	4,821,000	4,043,000	'
Warrant [Member] | Public Company [Member]	'	'	'	'	'
Derivative [Line Items]	'	'	'	'	'
Warrant valuation in warrants held	$100,000	'	$100,000	'	$1,000,000
Number of companies in which warrants are held	5	'	5	'	3
Number of companies in which warrant gains were realized	6	1	10	1	'

Derivatives_Gains_and_Losses_o

Derivatives Gains and Losses on Equity Warrants (Details) (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'		'	'		'
Warrant income	$721		$899	$2,937		$3,263
Warrant [Member]	'		'	'		'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'		'	'		'
Gains on exercise of equity warrant assets	1,813		2,433	4,831		4,043
Losses on exercise of equity warrant assets	-8	[1]	0	-10	[1]	0
Net gains on exercise of equity warrant assets	1,805		2,433	4,821		4,043
Non-monetized write off of warrant assets	-178		-132	-354		-310
Net realized gains on equity warrant assets	1,627		2,301	4,467		3,733
Change in fair value of equity warrant assets	-906		-1,402	-1,530		-470
Warrant income	721		899	2,937		3,263
Number of companies in which warrant gains were realized	15		9	48		23
Warrant [Member] | Early stage [Member]	'		'	'		'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'		'	'		'
Gains on exercise of equity warrant assets	167		0	1,197		456
Losses on exercise of equity warrant assets	0		0	-8		0
Number of companies in which warrant gains were realized	4		0	15		3
Warrant [Member] | Expansion stage [Member]	'		'	'		'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'		'	'		'
Gains on exercise of equity warrant assets	350		2,433	1,884		2,915
Losses on exercise of equity warrant assets	-8		0	-2		0
Number of companies in which warrant gains were realized	8		9	25		18
Warrant [Member] | Late stage [Member]	'		'	'		'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'		'	'		'
Gains on exercise of equity warrant assets	$1,296		$0	$1,750		$672
Number of companies in which warrant gains were realized	3		0	8		2
Public Company [Member] | Warrant [Member]	'		'	'		'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'		'	'		'
Number of companies in which warrant gains were realized	6		1	10		1
[1]	(1) Realized warrant losses for the three months ended September 30, 2014, related to one early stage company, and for the three and nine months ended September 30, 2014, related to one early stage company and one expansion stage company.

Fair_Value_of_Financial_Assets3

Fair Value of Financial Assets and Liabilities Narrative (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014
	Maximum [Member]	Minimum [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]	Recurring [Member]
					Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]	Venture capital fund investments [Member]	Venture capital fund investments [Member]	Venture capital fund investments [Member]	Venture capital fund investments [Member]	Venture capital fund investments [Member]
							Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]
									CRA Purposes [Member]	Square 1 Ventures [Member]	Parent Company [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Carrying Value, Investments, Entities that Calculate Net Asset Value Per Share	'	'	'	'	$4,244	$4,066	$4,244	$4,066	'	'	'
Venture capital fund investments	'	'	$4,244	$4,066	$4,244	$4,066	$4,244	$4,066	$1,300	$1,800	$900
Estimated period of distributions from entities that calculate net asset value per share	'13 years 0 months 0 days	'10 years 0 months 0 days	'	'	'	'	'	'	'	'	'

Fair_Value_of_Financial_Assets4

Fair Value of Financial Assets and Liabilities Summary of Level 3 Valuation Techniques (Details) (Recurring [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	$1,186,887	$924,229
Warrants	4,089	5,105
Servicing asset	1,275	1,265
Venture capital fund investments	4,244	4,066
Agency direct obligations [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	34,647	35,061
SBA pools [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	145,041	129,211
Agency MBS [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	584,038	447,850
Corporates [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	121,025	145,817
Municipal bonds [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	98,126	92,029
Non-agency MBS [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	132,887	52,170
Other ABS [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	49,008	22,091
Equity securities [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	2,453	'
Level 3 [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	181,895	100,562
Warrants	4,089	5,105
Servicing asset	1,275	1,265
Venture capital fund investments	4,244	4,066
Level 3 [Member] | Agency direct obligations [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	0	0
Level 3 [Member] | SBA pools [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	0	0
Level 3 [Member] | Agency MBS [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	0	0
Level 3 [Member] | Corporates [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	0	26,301
Level 3 [Member] | Municipal bonds [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	0	0
Level 3 [Member] | Non-agency MBS [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	132,887	52,170
Level 3 [Member] | Other ABS [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	49,008	22,091
Level 3 [Member] | Equity securities [Member]	'	'
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]	'	'
Available for sale securities	$0	'

Fair_Value_of_Financial_Assets5

Fair Value of Financial Assets and Liabilities Fair Value of Financial Assets Measured on a Recurring and Nonrecurring Basis (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Recurring [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	$1,186,887	$924,229
Warrants	4,089	5,105
Servicing asset	1,275	1,265
Venture capital fund investments	4,244	4,066
Recurring [Member] | US Treasury Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	19,662	'
Recurring [Member] | Agency direct obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	34,647	35,061
Recurring [Member] | SBA pools [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	145,041	129,211
Recurring [Member] | Agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	584,038	447,850
Recurring [Member] | Corporates [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	121,025	145,817
Recurring [Member] | Municipal bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	98,126	92,029
Recurring [Member] | Non-agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	132,887	52,170
Recurring [Member] | Other ABS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	49,008	22,091
Recurring [Member] | Equity securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	2,453	'
Recurring [Member] | Level 1 [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	56,762	35,061
Warrants	0	0
Servicing asset	0	0
Venture capital fund investments	0	'
Recurring [Member] | Level 1 [Member] | Venture Capital Fund Investments [Member]	'	'
Available for sale securities:	'	'
Venture capital fund investments	'	0
Recurring [Member] | Level 1 [Member] | US Treasury Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	19,662	'
Recurring [Member] | Level 1 [Member] | Agency direct obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	34,647	35,061
Recurring [Member] | Level 1 [Member] | SBA pools [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 1 [Member] | Agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 1 [Member] | Corporates [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 1 [Member] | Municipal bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 1 [Member] | Non-agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 1 [Member] | Other ABS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 1 [Member] | Equity securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	2,453	'
Recurring [Member] | Level 2 [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	948,230	788,606
Warrants	0	0
Servicing asset	0	0
Venture capital fund investments	0	'
Recurring [Member] | Level 2 [Member] | Venture Capital Fund Investments [Member]	'	'
Available for sale securities:	'	'
Venture capital fund investments	'	0
Recurring [Member] | Level 2 [Member] | US Treasury Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	'
Recurring [Member] | Level 2 [Member] | Agency direct obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 2 [Member] | SBA pools [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	145,041	129,211
Recurring [Member] | Level 2 [Member] | Agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	584,038	447,850
Recurring [Member] | Level 2 [Member] | Corporates [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	121,025	119,516
Recurring [Member] | Level 2 [Member] | Municipal bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	98,126	92,029
Recurring [Member] | Level 2 [Member] | Non-agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 2 [Member] | Other ABS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 2 [Member] | Equity securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	'
Recurring [Member] | Level 3 [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	181,895	100,562
Warrants	4,089	5,105
Servicing asset	1,275	1,265
Venture capital fund investments	4,244	4,066
Recurring [Member] | Level 3 [Member] | Venture Capital Fund Investments [Member]	'	'
Available for sale securities:	'	'
Venture capital fund investments	4,244	4,066
Recurring [Member] | Level 3 [Member] | US Treasury Securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	'
Recurring [Member] | Level 3 [Member] | Agency direct obligations [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 3 [Member] | SBA pools [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 3 [Member] | Agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 3 [Member] | Corporates [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	26,301
Recurring [Member] | Level 3 [Member] | Municipal bonds [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	0
Recurring [Member] | Level 3 [Member] | Non-agency MBS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	132,887	52,170
Recurring [Member] | Level 3 [Member] | Other ABS [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	49,008	22,091
Recurring [Member] | Level 3 [Member] | Equity securities [Member]	'	'
Available for sale securities:	'	'
Available for sale securities	0	'
Nonrecurring [Member] | Foreclosed Assets [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	'	119
Nonrecurring [Member] | Impaired Loans [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	3,425	9,022
Nonrecurring [Member] | Level 1 [Member] | Foreclosed Assets [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	'	0
Nonrecurring [Member] | Level 1 [Member] | Impaired Loans [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	0	0
Nonrecurring [Member] | Level 2 [Member] | Foreclosed Assets [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	'	0
Nonrecurring [Member] | Level 2 [Member] | Impaired Loans [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	0	0
Nonrecurring [Member] | Level 3 [Member] | Foreclosed Assets [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	'	119
Nonrecurring [Member] | Level 3 [Member] | Impaired Loans [Member]	'	'
Available for sale securities:	'	'
Other Assets, Fair Value Disclosure	$3,425	$9,022

Fair_Value_of_Financial_Assets6

Fair Value of Financial Assets and Liabilities Fair Value of Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Purchases, sales, issuances and settlements:	'	'	'	'
Number of available for sale securities transfered into Level 3 from Level 2	'0	'2	'2	'2
Recurring [Member] | Level 3 [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	135,971	67,015	110,998	42,444
Transfers into Level 3	0	5,138	5,756	5,501
Transfers out of Level 3	-6,214	0	-31,925	0
Total gains (losses) included in net income	460	1,814	4,109	4,172
Total gains (losses) included in other comprehensive income	-3,706	1,820	-14,990	2,670
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	75,613	26,670	131,907	48,764
Sales	-1,782	-2,490	-5,785	-4,224
Issuances	588	606	1,293	1,685
Settlements	-9,427	-102	-9,860	-541
Balance at beginning of period	191,503	100,471	191,503	100,471
Recurring [Member] | Level 3 [Member] | Corporates [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	6,085	16,584	26,301	11,715
Transfers into Level 3	0	5,138	2,994	5,501
Transfers out of Level 3	-6,085	0	-29,474	0
Total gains (losses) included in net income	0	0	0	0
Total gains (losses) included in other comprehensive income	0	0	179	485
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	0	0	0	4,021
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	'	0
Balance at beginning of period	0	21,722	0	21,722
Recurring [Member] | Level 3 [Member] | Non-agency MBS [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	85,434	27,592	52,170	19,016
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Total gains (losses) included in net income	0	0	0	0
Total gains (losses) included in other comprehensive income	-3,706	690	-8,111	2,185
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	51,159	17,657	91,031	24,738
Sales	0	0	-2,203	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Balance at beginning of period	132,887	45,939	132,887	45,939
Recurring [Member] | Level 3 [Member] | Other ABS [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	34,047	12,211	22,091	2,643
Transfers into Level 3	0	0	2,762	0
Transfers out of Level 3	0	0	0	0
Total gains (losses) included in net income	0	0	0	0
Total gains (losses) included in other comprehensive income	0	1,130	-7,058	0
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	24,222	8,979	40,474	19,677
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	-9,261	0	-9,261	0
Balance at beginning of period	49,008	22,320	49,008	22,320
Recurring [Member] | Level 3 [Member] | Venture capital fund investments [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	4,333	3,156	4,066	3,303
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	-953	0
Total gains (losses) included in net income	-261	988	1,154	986
Total gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	232	34	402	328
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	-60	-102	-425	-541
Balance at beginning of period	4,244	4,076	4,244	4,076
Recurring [Member] | Level 3 [Member] | Servicing Contracts [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	1,325	1,142	1,265	987
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Total gains (losses) included in net income	0	-73	18	-77
Total gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	56	127	166	286
Settlements	-106	0	-174	0
Balance at beginning of period	1,275	1,196	1,275	1,196
Recurring [Member] | Level 3 [Member] | Warrant [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Balance at beginning of period	4,747	6,330	5,105	4,780
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	-129	0	-1,498	0
Total gains (losses) included in net income	721	899	2,937	3,263
Total gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements:	'	'	'	'
Purchases	0	0	0	0
Sales	-1,782	-2,490	-3,582	-4,224
Issuances	532	479	1,127	1,399
Settlements	0	0	0	0
Balance at beginning of period	4,089	5,218	4,089	5,218

Fair_Value_of_Financial_Assets7

Fair Value of Financial Assets and Liabilities Fair Value, Investments, Entities that Calculate Net Asset Value Per Share (Details) (Recurring [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	$4,244	$4,066
Level 1 [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	0	'
Level 1 [Member] | Venture capital fund investments [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	'	0
Level 2 [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	0	'
Level 2 [Member] | Venture capital fund investments [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	'	0
Level 3 [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Carrying Value, Investments, Entities that Calculate Net Asset Value Per Share	4,244	4,066
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	4,244	4,066
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	2,025	1,006
Level 3 [Member] | Venture capital fund investments [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Carrying Value, Investments, Entities that Calculate Net Asset Value Per Share	4,244	4,066
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	4,244	4,066
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$2,025	$1,006

Fair_Value_of_Financial_Assets8

Fair Value of Financial Assets and Liabilities Financial Instruments Not Carried at Fair Value, Estimated Fair Value (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]	'		'		'	'
Cash and cash equivalents	$185,606		$105,730		$54,063	$48,971
Fair Value, Estimate Not Practicable, Cash and Cash Equivalents	185,606		105,730		'	'
Investment in time deposits	1,250		1,250		'	'
Investment securities—held to maturity, at amortized cost	278,121		154,255		'	'
Loans, net of unearned income	1,271,457		1,082,536		'	'
FHLB stock	2,091		2,162		'	'
Interest Receivable	10,835		9,023		'	'
Assets, Fair Value Disclosure [Abstract]	'		'		'	'
Investment in time deposits, fair value	1,250		1,250		'	'
Investment securities—held to maturity, fair value	283,157		146,554		'	'
Loans, net of unearned income, fair value	1,277,550		1,088,062		'	'
FHLB stock, fair value	2,091		2,162		'	'
Accrued interest receivable, fair value	10,835		9,023		'	'
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]	'		'		'	'
Non-maturity deposits	2,651,938	[1]	2,079,909	[1]	'	'
Time deposits	16,507		26,818		'	'
Long-term debt	0		6,207		'	'
Liabilities, Fair Value Disclosure [Abstract]	'		'		'	'
Non-maturity deposits(1), fair value	2,651,938	[1]	2,046,398	[1]	'	'
Time deposits, estimated fair value	16,466		26,851		'	'
Long-term debt, fair value	0		5,753		'	'
Future financing commitments, fair value	1,167,115		977,262		'	'
Level 1 [Member]	'		'		'	'
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]	'		'		'	'
Fair Value, Estimate Not Practicable, Cash and Cash Equivalents	185,606		105,730		'	'
Assets, Fair Value Disclosure [Abstract]	'		'		'	'
Investment in time deposits, fair value	1,250		1,250		'	'
Investment securities—held to maturity, fair value	0		0		'	'
Loans, net of unearned income, fair value	0		0		'	'
FHLB stock, fair value	0		0		'	'
Accrued interest receivable, fair value	0		0		'	'
Liabilities, Fair Value Disclosure [Abstract]	'		'		'	'
Non-maturity deposits(1), fair value	2,651,938	[1]	2,046,398	[1]	'	'
Time deposits, estimated fair value	0		0		'	'
Long-term debt, fair value	0		0		'	'
Future financing commitments, fair value	0		0		'	'
Level 2 [Member]	'		'		'	'
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]	'		'		'	'
Fair Value, Estimate Not Practicable, Cash and Cash Equivalents	0		0		'	'
Assets, Fair Value Disclosure [Abstract]	'		'		'	'
Investment in time deposits, fair value	0		0		'	'
Investment securities—held to maturity, fair value	276,407		140,254		'	'
Loans, net of unearned income, fair value	0		0		'	'
FHLB stock, fair value	0		0		'	'
Accrued interest receivable, fair value	0		9,023		'	'
Liabilities, Fair Value Disclosure [Abstract]	'		'		'	'
Non-maturity deposits(1), fair value	0	[1]	0	[1]	'	'
Time deposits, estimated fair value	16,466		26,851		'	'
Long-term debt, fair value	0		5,753		'	'
Future financing commitments, fair value	0		0		'	'
Level 3 [Member]	'		'		'	'
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]	'		'		'	'
Fair Value, Estimate Not Practicable, Cash and Cash Equivalents	0		0		'	'
Assets, Fair Value Disclosure [Abstract]	'		'		'	'
Investment in time deposits, fair value	0		0		'	'
Investment securities—held to maturity, fair value	6,750		6,300		'	'
Loans, net of unearned income, fair value	1,277,550		1,088,062		'	'
FHLB stock, fair value	2,091		2,162		'	'
Accrued interest receivable, fair value	10,835		0		'	'
Liabilities, Fair Value Disclosure [Abstract]	'		'		'	'
Non-maturity deposits(1), fair value	0	[1]	0	[1]	'	'
Time deposits, estimated fair value	0		0		'	'
Long-term debt, fair value	0		0		'	'
Future financing commitments, fair value	$1,167,115		$977,262		'	'
[1]	Includes noninterest demand deposits, interest-bearing demand deposits and money market deposits.

Offbalance_Sheet_Risk_Commitme2

Off-balance Sheet Risk, Commitments & Contingencies (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Unfunded lines of Credit [Member]	'	'
Other Commitments [Line Items]	'	'
Unused Commitments to Extend Credit	$1,200	$977.30
Standby Letters of Credit [Member]	'	'
Other Commitments [Line Items]	'	'
Unused Commitments to Extend Credit	$68.20	$89.20