Texas Capital Bancshares (TCBI) 10-Q 24 Jul 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	6 Months Ended
	Jun. 30, 2014	Jul. 22, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Amendment Flag	'false	'
Entity Registrant Name	'TEXAS CAPITAL BANCSHARES INC/TX	'
Entity Central Index Key	'0001077428	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Common Stock, Shares Outstanding	'	43,111,768
Entity Public Float	'	$2,256,901,055
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and due from banks	$116,525	$92,484
Interest-bearing Deposits in Banks	240,617	61,337
Federal funds sold and securities purchased under resale agreements	0	90
Securities, available-for-sale	49,330	63,214
Loans held for sale from discontinued operations	290	294
Loans held for investment, mortgage finance	3,700,253	2,784,265
Loans held for investment (net of unearned income)	9,152,715	8,486,309
Less: Allowance for loan losses	91,114	87,604
Loans held for investment, net	12,761,854	11,182,970
Premises and equipment, net	15,762	11,482
Accrued interest receivable and other assets	327,510	281,534
Goodwill and intangible assets, net	20,938	21,286
Total assets	13,532,826	11,714,691
Deposits:	'	'
Non-interest bearing	4,181,774	3,347,567
Interest bearing	6,233,357	5,579,505
Interest bearing in foreign branches	342,185	330,307
Total deposits	10,757,316	9,257,379
Accrued interest payable	4,671	749
Other liabilities	108,069	110,177
Federal funds purchased and repurchase agreements	300,532	170,604
Other borrowings	700,016	855,026
Subordinated notes	286,000	111,000
Trust preferred subordinated debentures	113,406	113,406
Total liabilities	12,270,010	10,618,341
Stockholders' equity:	'	'
Preferred stock, $.01 par value, $1,000 liquidation value: Authorized shares - 10,000,000; Issued shares - none	150,000	150,000
Common stock, $.01 par value: Authorized shares - 100,000,000; Issued shares - 36,957,104 and 35,919,941 at December 31 2010 and 2009, respectively	431	410
Additional paid-in capital	557,919	448,208
Retained earnings	552,923	496,112
Treasury stock	8	8
Accumulated other comprehensive income	1,551	1,628
Total stockholders' equity	-1,262,816	-1,096,350
Total liabilities and stockholders' equity	$13,532,826	$11,714,691

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Preferred Stock, Par or Stated Value Per Share	$0.01	$0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	6,000,000	6,000,000
Common Stock, Par or Stated Value Per Share	($0.01)	($0.01)
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	43,105,861	41,036,787
Treasury Stock, Shares	417	417

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income	'	'	'	'
Interest and fees on loans	$124,234	$106,418	$240,106	$209,600
Securities	471	773	1,011	1,712
Federal funds sold	8	13	48	19
Deposits in other banks	100	60	259	112
Interest and Dividend Income, Operating, Total	124,813	107,264	241,424	211,443
Interest expense	'	'	'	'
Deposits	4,246	3,228	8,276	6,473
Federal funds purchased	115	206	210	418
Repurchase agreements	4	5	8	9
Other borrowings	181	143	253	356
Subordinated notes	4,241	1,829	7,720	3,658
Trust preferred submordinated debentures	619	633	1,235	1,267
Interest Expense, Total	9,406	6,044	17,702	12,181
Net interest income	115,407	101,220	223,722	199,262
Provision for credit losses	4,000	7,000	9,000	9,000
Net interest income after provision for credit losses	111,407	94,220	214,722	190,262
Non-interest income	'	'	'	'
Service charges on deposit accounts	1,764	1,749	3,460	3,450
Trust fee income	1,242	1,269	2,524	2,510
Bank Owned Life Insurance (BOLI) Income	521	463	1,030	961
Brokered loan fees	3,357	4,778	6,181	9,522
Swap fee income	410	981	1,634	2,633
Other	3,239	1,888	6,060	3,333
Total non-interest income	10,533	11,128	20,889	22,409
Non-interest expense	'	'	'	'
Salaries and employee benefits	39,896	45,191	81,952	78,732
Net occupancy expense	5,073	4,135	9,841	7,992
Marketing	3,795	4,074	7,554	8,046
Legal and professional	7,181	4,707	12,583	8,647
Communications and technology	4,361	3,347	8,285	6,469
FDIC insurance assessment	2,544	699	5,269	1,777
Allowance and other carrying costs for OREO	11	482	56	912
Other	6,907	6,099	13,549	11,859
Total non-interest expense	69,768	68,734	139,089	124,434
Income (loss) from continuing operations before income taxes	52,172	36,614	96,522	88,237
Income tax expense	18,754	12,542	34,843	31,021
Income from continuing operations	33,418	24,072	61,679	57,216
Income (loss) from discontinued operations (after-tax)	3	1	7	0
Net income	33,421	24,073	61,686	57,216
Preferred stock dividends	2,437	2,438	4,875	2,519
Net income available to common shareholders	30,984	21,635	56,811	54,697
Basic earnings per common share	'	'	'	'
Income from continuing operations	$0.72	$0.53	$1.33	$1.34
Net income	$0.72	$0.53	$1.33	$1.34
Diluted earnings per common share	'	'	'	'
Income from continuing operations	$0.71	$0.52	$1.30	$1.31
Net income	$0.71	$0.52	$1.30	$1.31
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	'	'	'	'
Change in unrealized gain on available-for-sale securities arising during period, before tax	43	-1,028	-118	-1,752
Income tax benefit related to unrealized gain on available-for-sale securities	'	'	41	613
Other Comprehensive Income, net of tax	28	-668	-77	-1,139
Comprehensive income:	'	'	'	'
Comprehensive income	$33,449	$23,405	$61,609	$56,077

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
In Thousands, except Share data, unless otherwise specified
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2012	$836,242	$0	$407	$450,116	$382,455	($8)	$3,272
Shares, Outstanding, Beginning Balance at Dec. 31, 2012	'	0	40,727,996	'	'	-417	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	57,216	'	'	'	57,216	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $100 (unaudited)	-1,139	'	'	'	'	'	-1,139
Comprehensive income	56,077	'	'	'	'	'	'
Tax expense related to exercise of stock options	'	'	'	-659	'	'	'
Stock-based compensation expense recognized in earnings	-11,250	'	'	1,843	'	'	'
Issuance of common stock related to stock-based awards - Value	-1,016	'	1	-1,017	'	'	'
Issuance of common stock related to stock-based awards - Shares	'	'	134,902	'	'	'	'
Issuance of preferred stock - Value	144,987	150,000	'	-5,013	'	'	'
Issuance of preferred stock - Shares	'	6,000,000	'	'	'	'	'
Preferred stock dividend and accretion of preferred stock discount	2,085	'	'	'	2,519	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2013	1,034,955	150,000	408	445,270	437,152	-8	2,133
Shares, Outstanding, Ending Balance at Jun. 30, 2013	'	6,000,000	40,862,898	'	'	-417	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2013	1,096,350	150,000	410	448,208	496,112	-8	1,628
Shares, Outstanding, Beginning Balance at Dec. 31, 2013	'	6,000,000	41,036,787	'	'	-417	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	61,686	'	'	'	61,686	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $100 (unaudited)	-77	'	'	'	'	'	-77
Comprehensive income	61,609	'	'	'	'	'	'
Tax expense related to exercise of stock options	'	'	'	1,479	'	'	'
Stock-based compensation expense recognized in earnings	-7,233	'	'	2,528	'	'	'
Issuance of common stock related to stock-based awards - Value	-823	'	1	-824	'	'	'
Issuance of common stock related to stock-based awards - Shares	'	'	94,845	'	'	'	'
Issuance of common stock - Value	106,548	'	19	106,529	'	'	'
Issuance of common stock - Shares	'	'	1,875,000	'	'	'	'
Issuance of common stock related to warrants - Value	0	'	1	-1	'	'	'
Issuance of common stock related to warrants - Shares	'	'	99,229	'	'	'	'
Issuance of preferred stock - Value	0	'	0	0	'	'	'
Issuance of preferred stock - Shares	'	0	'	'	'	'	'
Preferred stock dividend and accretion of preferred stock discount	4,875	'	'	'	4,875	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2014	$1,262,816	$150,000	$431	$557,919	$552,923	($8)	$1,551
Shares, Outstanding, Ending Balance at Jun. 30, 2014	'	6,000,000	43,105,861	'	'	-417	'

CONSOLIDATED_STATEMENTS_OF_STO1

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parentheticals) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Available-for-sale Securities, Income Tax Expense on Change in Unrealized Holding Gain (Loss)	$41	$613

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities	'	'
Net income from continuing operations	$61,679	$57,216
Adjustments to reconcile net income to net cash (used in) operating activities	'	'
Provision for credit losses	9,000	9,000
Depreciation and amortization	6,693	2,494
Amortiziation and accretion on securities	0	14
Bank Owned Life Insurance (BOLI) Income	-1,030	-961
Tax benefit from stock option exercises	1,479	-659
Excess tax benefits from stock-based compensation arrangements	-4,227	1,882
Loss on sale of assets	-709	-439
Changes in operating assets and liabilities:	'	'
Accrued interest receivable and other assets	-51,807	33,892
Accrued interest payable and other liabilities	-2,849	2,237
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total	25,462	115,926
Net cash (used in) operating activities of discontinued operations	11	4
Net Cash Provided by (Used in) Operating Activities, Total	25,473	115,930
Net cash used in investing activities of continuing operations	'	'
Payments to Acquire Available-for-sale Securities	0	0
Maturities and calls of available-for-sale securities	8,474	12,245
Principal payments received on available-for-sale securities	5,292	10,323
Originations of mortgage finance loans	23,694,564	27,736,248
Proceeds from pay-offs of mortgage finance loans	22,778,576	28,073,286
Net (increase) decrease in loans held for investment	-671,896	-729,034
Purchase of premises and equipment, net	-6,193	-2,292
Proceeds from sale of foreclosed assets	-5,763	-3,660
Cash paid for acquisition	0	2,445
Net Cash Provided by (Used in) Investing Activities, Continuing Operations, Total	-1,574,548	-370,505
Net cash provided by financing activities of continuing operations	'	'
Net increase (decrease) in deposits	1,499,937	539,794
Proceeds from issuance of stock related to stock-based awards	-824	-1,016
Proceeds from issuance of common stock	106,548	0
Proceeds from issuance of preferred stock and related warrants	0	144,987
Preferred stock dividend and accretion of preferred stock discount	-4,875	-2,085
Net increase (decrease) in other borrowings	-149,473	-346,867
Proceeds from issuance of subordinated notes	172,375	0
Excess tax benefits from stock-based compensation arrangements	4,227	-1,882
Net (decrease) in federal funds purchased	124,391	34,336
Net Cash Provided by (Used in) Financing Activities, Continuing Operations, Total	1,752,306	367,267
Cash and Cash Equivalents, Period Increase (Decrease), Total	203,231	112,692
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	153,911	206,348
Cash and Cash Equivalents, at Carrying Value, Ending Balance	357,142	319,040
Supplemental disclosures of cash flow information:	'	'
Cash paid during the period for interest	13,780	11,808
Cash paid during the period for income taxes	33,702	38,112
Non-cash transactions:	'	'
Transfers from loans/leases to OREO and other repossessed assets	$851	$912

Operations_and_Summary_of_Sign

Operations and Summary of Significant Accounting Policies	3 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Operations and Summary of Significant Accounting Policies	'
	(1) OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Organization and Nature of Business
	Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional or national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas.
	Basis of Presentation
	Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.
	The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2013, included in our Annual Report on Form 10-K filed with the SEC on February 20, 2014 (the “2013 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.
	Use of Estimates
	The preparation of 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 financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.
	Correction of an Error in the Financial Statements
	We determined during the fourth quarter of 2013 that purchases and sales of mortgage finance loan interests that had been reported on our consolidated statements of cash flows as cash flows from operating activities should have been reported as investing activities because the related asset balances should have been reported as held for investment rather than held for sale on our consolidated balance sheets.
	We have corrected the classification of these assets on the consolidated balance sheets to reflect them as held for investment. We have corrected the previously presented cash flows for these loans and in doing so the consolidated statements of cash flows for the six months ended June 30, 2013 were adjusted to decrease net cash flows from operating activities by $337.0 million, with a corresponding increase in net cash flows from investing activities. The change does not impact our reported earnings as we do not believe any reserve for loan losses relating to the mortgage finance portfolio is necessary based upon the risk profile of the assets and the less than one basis point loss experience of the program over the last ten years. This reclassification does not change total loans or total assets on our consolidated balance sheets. We have evaluated the effect of the incorrect presentation, both qualitatively and quantitatively, and concluded that it did not materially misstate our previously issued financial statements.
	Cash and Cash Equivalents
	Cash equivalents include amounts due from banks, interest-bearing deposits and Federal funds sold.
	Securities
	Securities are classified as trading, available-for-sale or held-to-maturity. Management classifies securities at the time of purchase and re-assesses such designation at each balance sheet date; however, transfers between categories from this re-assessment are rare.
	Trading Account
	Securities acquired for resale in anticipation of short-term market movements are classified as trading, with realized and unrealized gains and losses recognized in income. To date, we have not had any activity in our trading account.
	Held-to-Maturity and Available-for-Sale
	Debt securities are classified as held-to-maturity when we have the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost. Debt securities not classified as held-to-maturity or trading and marketable equity securities not classified as trading are classified as available-for-sale.
	Available-for-sale securities are stated at fair value, with the unrealized gains and losses reported in a separate component of accumulated other comprehensive income (loss), net of tax. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, or in the case of mortgage-backed securities, over the estimated life of the security. Such amortization and accretion is included in interest income from securities. Realized gains and losses and declines in value judged to be other-than-temporary are included in gain (loss) on sale of securities. The cost of securities sold is based on the specific identification method.
	All securities are available-for-sale as of June 30, 2014 and December 31, 2013.
	Loans
	Loans Held for Investment
	Loans held for investment (which include equipment leases accounted for as financing leases) are stated at the amount of unpaid principal reduced by deferred income (net of costs). Interest on loans is recognized using the simple-interest method on the daily balances of the principal amounts outstanding. Loan origination fees, net of direct loan origination costs, and commitment fees, are deferred and amortized as an adjustment to yield over the life of the loan, or over the commitment period, as applicable.
	A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. Reserves on impaired loans are measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or the fair value of the underlying collateral. Impaired loans, or portions thereof, are charged off when deemed uncollectible.
	The accrual of interest on loans is discontinued when there is a clear indication that the borrower's cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining book balance of the asset is deemed to be collectible. If collectibility is questionable, then cash payments are applied to principal. A loan is placed back on accrual status when both principal and interest are current and it is probable that we will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement.
	Loans held for investment includes legal ownership interests in mortgage loans that we purchase through our mortgage warehouse lending division. The ownership interests are purchased from unaffiliated mortgage originators who are seeking additional funding through sale of the undivided ownership interests to facilitate their ability to originate loans. The mortgage originator has no obligation to offer and we have no obligation to purchase these interests. The originator closes mortgage loans consistent with underwriting standards established by approved investors, and, at the time of the sale to the investor, our ownership interest and that of the originator are delivered by us to the investor selected by the originator and approved by us. We typically purchase up to a 99% ownership interest in each mortgage with the originator owning the remaining percentage. These mortgage ownership interests are held by us for an interim period, usually less than 30 days and more typically 10-20 days. Because of conditions in agreements with originators designed to reduce transaction risks, under Accounting Standards Codification 860, Transfers and Servicing of Financial Assets (“ASC 860”), the ownership interests do not qualify as participating interests. Under ASC 860, the ownership interests are deemed to be loans to the originators and payments we receive from investors are deemed to be payments made by or on behalf of the originator to repay the loan deemed made to the originator. Because we have an actual, legal ownership interest in the underlying residential mortgage loan, these interests are not extensions of credit to the originators that are secured by the mortgage loans as collateral.
	Due to market conditions or events of default by the investor or the originator, we could be required to purchase the remaining interests in the mortgage loans and hold them beyond the expected 10-20 days. Mortgage loans acquired under these conditions could require future allocations of the allowance for loan losses or be subject to charge off in the event the loans become impaired. Mortgage loan interests purchased and disposed of as expected receive no allocation of the allowance for loan losses due to the minimal loss experience with these assets.
	Allowance for Loan Losses
	The allowance for loan losses is established through a provision for loan losses charged against income. The allowance for loan losses includes specific reserves for impaired loans and a general reserve for estimated losses inherent in the loan portfolio at the balance sheet date, but not yet identified with specific loans. Loans deemed to be uncollectible are charged against the allowance when management believes that the collectibility of the principal is unlikely and subsequent recoveries, if any, are credited to the allowance. Management's periodic evaluation of the adequacy of the allowance is based on an assessment of the current loan portfolio, including known inherent risks, adverse situations that may affect the borrowers' ability to repay, the estimated value of any underlying collateral and current economic conditions.
	Other Real Estate Owned
	Other real estate owned (“OREO”), which is included in other assets on the balance sheet, consists of real estate that has been foreclosed. Real estate that has been foreclosed is recorded at the fair value of the real estate, less selling costs, through a charge to the allowance for loan losses, if necessary. Subsequent write-downs required for declines in value are recorded through a valuation allowance, or taken directly to the asset, charged to other non-interest expense.
	Premises and Equipment
	Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from three to ten years. Gains or losses on disposals of premises and equipment are included in results of operations.
	Marketing and Software
	Marketing costs are expensed as incurred. Ongoing maintenance and enhancements of websites are expensed as incurred. Costs incurred in connection with development or purchase of internal use software are capitalized and amortized over a period not to exceed five years. Internal use software costs are included in other assets in the consolidated financial statements.
	Goodwill and Other Intangible Assets
	Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Our intangible assets relate primarily to loan customer relationships. Intangible assets with definite useful lives are amortized on an accelerated basis over their estimated life. Intangible assets are tested for impairment annually or whenever events or changes in circumstances indicate the carrying amount of the assets may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
	Segment Reporting
	We have determined that all of our lending divisions and subsidiaries meet the aggregation criteria of ASC 280, Segment Reporting, since all offer similar products and services, operate with similar processes, and have similar customers.
	Stock-based Compensation
	We account for all stock-based compensation transactions in accordance with ASC 718, Compensation – Stock Compensation (“ASC 718”), which requires that stock compensation transactions be recognized as compensation expense in the statement of operations based on their fair values on the measurement date, which is the date of the grant.
	Accumulated Other Comprehensive Income
	Unrealized gains or losses on our available-for-sale securities (after applicable income tax expense or benefit) are included in accumulated other comprehensive income, net. Other comprehensive income (loss), net of tax, for the six months ended June 30, 2014 and 2013 is reported in the accompanying consolidated statements of stockholders' equity and consolidated statements of income and other comprehensive income.
	Income Taxes
	The Company and its subsidiary file a consolidated federal income tax return. We utilize the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based upon the difference between the values of the assets and liabilities as reflected in the financial statements and their related tax basis using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled. As changes in tax law or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. A valuation reserve is provided against deferred tax assets unless it is more likely than not that such deferred tax assets will be realized.
	Basic and Diluted Earnings Per Common Share
	Basic earnings per common share is based on net income available to common stockholders divided by the weighted-average number of common shares outstanding during the period excluding non-vested stock awards. Diluted earnings per common share include the dilutive effect of stock options and non-vested stock awards using the treasury stock method. A reconciliation of the weighted-average shares used in calculating basic earnings per common share and the weighted average common shares used in calculating diluted earnings per common share for the reported periods is provided in Note 2 – Earnings Per Common Share.
	Fair Values of Financial Instruments
	ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and enhances disclosures about fair value measurements. In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	(2) EARNINGS PER COMMON SHARE
	The following table presents the computation of basic and diluted earnings per share (in thousands except per share data):
				Three months ended June 30,				Six months ended June 30,
					2014		2013		2014		2013
	Numerator:
		Net income from continuing operations		$	33,418	$	24,072	$	61,679	$	57,216
		Preferred stock dividends			2,437		2,438		4,875		2,519
		Net income from continuing operations
			available to common stockholders		30,981		21,634		56,804		54,697
		Income from discontinued operations			3		1		7		-
		Net income		$	30,984	$	21,635	$	56,811	$	54,697
	Denominator:
		Denominator for basic earnings per share -
			weighted average shares		43,075,213		40,813,918		42,735,580		40,784,769
		Effect of employee stock-based awards(1)			336,993		415,049		359,794		436,219
		Effect of warrants to purchase common stock			432,809		494,558		486,113		496,464
		Denominator for dilutive earnings per share -
			adjusted weighted average shares and
			assumed conversions		43,845,015		41,723,525		43,581,487		41,717,452
	Basic earnings per common share from
		continuing operations		$	0.72	$	0.53	$	1.33	$	1.34
	Basic earnings per common share			$	0.72	$	0.53	$	1.33	$	1.34
	Diluted earnings per share from continuing
		operations		$	0.71	$	0.52	$	1.3	$	1.31
	Diluted earnings per common share			$	0.71	$	0.52	$	1.3	$	1.31
	(1)       Stock options, SARs and RSUs outstanding of 46,000 at June 30, 2014 and 99,500 at June 30, 2013 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

Securities

Securities	3 Months Ended
	Jun. 30, 2014
Available-for-sale Securities [Abstract]	'
Securities	'
	(3) SECURITIES
	Securities are identified as either held-to-maturity or available-for-sale based upon various factors, including asset/liability management strategies, liquidity and profitability objectives, and regulatory requirements. Held-to-maturity securities are carried at cost, adjusted for amortization of premiums or accretion of discounts. Available-for-sale securities are securities that may be sold prior to maturity based upon asset/liability management decisions. Securities identified as available-for-sale are carried at fair value. Unrealized gains or losses on available-for-sale securities are recorded as accumulated other comprehensive income in stockholders' equity, net of taxes. Amortization of premiums or accretion of discounts on mortgage-backed securities is periodically adjusted for estimated prepayments. Realized gains and losses and declines in value judged to be other-than-temporary are included in gain (loss) on sale of securities. The cost of securities sold is based on the specific identification method.
	At June 30, 2014, our net unrealized gain on the available-for-sale securities portfolio was $2.4 million compared to $2.5 million at December 31, 2013. As a percent of outstanding balances, the unrealized gain was 5.08% and 4.13% at June 30, 2014 and December 31, 2013, respectively. The increase in the percent of outstanding balances at June 30, 2014 related to change in market value.
	The following is a summary of securities (in thousands):
					30-Jun-14
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	33,491	$	2,511	$	-	$	36,002
		Municipals			5,930		22		-		5,952
		Equity securities(1)			7,522		11		-157		7,376
				$	46,943	$	2,544	$	-157	$	49,330
					31-Dec-13
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	38,786	$	2,676	$	-	$	41,462
		Municipals			14,401		104		-		14,505
		Equity securities(1)			7,522		-		-275		7,247
				$	60,709	$	2,780	$	-275	$	63,214
	(1) Equity securities consist of Community Reinvestment Act funds.
	The amortized cost and estimated fair value of securities are presented below by contractual maturity (in thousands, except percentage data):
					30-Jun-14
							After One		After Five
					Less Than		Through		Through		After Ten
					One Year		Five Years		Ten Years		Years		Total
	Available-for-sale:
		Residential mortgage-backed
			securities:(1)
			Amortized cost	$	13	$	11,711	$	6,504	$	15,263	$	33,491
			Estimated fair value		13		12,447		7,266		16,276		36,002
			Weighted average yield(3)		6.50%		4.80%		5.53%		2.36%		3.83%
		Municipals:(2)
			Amortized cost		3,614		2,316		-		-		5,930
			Estimated fair value		3,627		2,325		-		-		5,952
			Weighted average yield(3)		5.85%		5.75%		-		-		5.92%
		Equity securities:(4)
			Amortized cost		7,522		-		-		-		7,522
			Estimated fair value		7,376		-		-		-		7,376
		Total available-for-sale securities:
			Amortized cost									$	46,943
			Estimated fair value									$	49,330
					31-Dec-13
							After One		After Five
					Less Than		Through		Through		After Ten
					One Year		Five Years		Ten Years		Years		Total
	Available-for-sale:
		Residential mortgage-backed
			securities:(1)
			Amortized cost	$	238	$	14,720	$	7,718	$	16,110	$	38,786
			Estimated fair value		252		15,641		8,456		17,113		41,462
			Weighted average yield(3)		4.32%		4.78%		5.56%		2.40%		3.94%
		Municipals:(2)
			Amortized cost		7,749		6,652		-		-		14,401
			Estimated fair value		7,818		6,687		-		-		14,505
			Weighted average yield(3)		5.76%		5.71%		-		-		5.73%
		Equity securities:(4)
			Amortized cost		7,522		-		-		-		7,522
			Estimated fair value		7,247		-		-		-		7,247
		Total available-for-sale securities:
			Amortized cost									$	60,709
		Estimated fair value									$	63,214
(1)       Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.
(2)       Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.
(3)       Yields are calculated based on amortized cost.
(4)       These equity securities do not have a stated maturity.
Securities with carrying values of approximately $37.5 million were pledged to secure certain borrowings and deposits at June 30, 2014. Of the pledged securities at June 30, 2014, approximately $10.0 million were pledged for certain deposits, and approximately $27.5 million were pledged for repurchase agreements.
The following table discloses, as of June 30, 2014 and December 31, 2013, our investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months (in thousands):
30-Jun-14	Less Than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	-	$	-		$	6,343	$	-157		$	6,343	$	-157
31-Dec-13	Less Than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	7,247	$	-275		$	-	$	-		$	7,247	$	-275
At June 30, 2014, there was one security with an unrealized loss position. This security is a publicly traded equity fund and is subject to market pricing volatility. We do not believe this unrealized loss is “other than temporary”. We have evaluated the near-term prospects of the investment in relation to the severity and duration of the impairment and based on that evaluation have the ability and intent to hold the investment until recovery of fair value. We have not identified any issues related to the ultimate repayment of principal as a result of credit concerns on this security.
Unrealized gains or losses on our available-for-sale securities (after applicable income tax expense or benefit) are included in accumulated other comprehensive income (loss), net. Comprehensive income for the six months ended June 30, 2014 and 2013 included a net after-tax loss of $77,000 and $1.1 million, respectively, due to changes in the net unrealized gains/losses on securities available-for-sale.

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses	3 Months Ended
	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]	'
Loans and Allowance for Credit Losses	'
	Loans
	Loans Held for Investment
	Loans held for investment (which include equipment leases accounted for as financing leases) are stated at the amount of unpaid principal reduced by deferred income (net of costs). Interest on loans is recognized using the simple-interest method on the daily balances of the principal amounts outstanding. Loan origination fees, net of direct loan origination costs, and commitment fees, are deferred and amortized as an adjustment to yield over the life of the loan, or over the commitment period, as applicable.
	A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. Reserves on impaired loans are measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or the fair value of the underlying collateral. Impaired loans, or portions thereof, are charged off when deemed uncollectible.
	The accrual of interest on loans is discontinued when there is a clear indication that the borrower's cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining book balance of the asset is deemed to be collectible. If collectibility is questionable, then cash payments are applied to principal. A loan is placed back on accrual status when both principal and interest are current and it is probable that we will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement.
	Loans held for investment includes legal ownership interests in mortgage loans that we purchase through our mortgage warehouse lending division. The ownership interests are purchased from unaffiliated mortgage originators who are seeking additional funding through sale of the undivided ownership interests to facilitate their ability to originate loans. The mortgage originator has no obligation to offer and we have no obligation to purchase these interests. The originator closes mortgage loans consistent with underwriting standards established by approved investors, and, at the time of the sale to the investor, our ownership interest and that of the originator are delivered by us to the investor selected by the originator and approved by us. We typically purchase up to a 99% ownership interest in each mortgage with the originator owning the remaining percentage. These mortgage ownership interests are held by us for an interim period, usually less than 30 days and more typically 10-20 days. Because of conditions in agreements with originators designed to reduce transaction risks, under Accounting Standards Codification 860, Transfers and Servicing of Financial Assets (“ASC 860”), the ownership interests do not qualify as participating interests. Under ASC 860, the ownership interests are deemed to be loans to the originators and payments we receive from investors are deemed to be payments made by or on behalf of the originator to repay the loan deemed made to the originator. Because we have an actual, legal ownership interest in the underlying residential mortgage loan, these interests are not extensions of credit to the originators that are secured by the mortgage loans as collateral.
	Due to market conditions or events of default by the investor or the originator, we could be required to purchase the remaining interests in the mortgage loans and hold them beyond the expected 10-20 days. Mortgage loans acquired under these conditions could require future allocations of the allowance for loan losses or be subject to charge off in the event the loans become impaired. Mortgage loan interests purchased and disposed of as expected receive no allocation of the allowance for loan losses due to the minimal loss experience with these assets.
	(4) LOANS AND ALLOWANCE FOR LOAN LOSSES
	At June 30, 2014 and December 31, 2013, loans were as follows (in thousands):
			June 30,		December 31,
			2014		2013
	Commercial	$	5,295,368	$	5,020,565
	Mortgage finance		3,700,253		2,784,265
	Construction		1,567,667		1,262,905
	Real estate		2,231,630		2,146,228
	Consumer		15,847		15,350
	Leases		95,914		93,160
	Gross loans held for investment		12,906,679		11,322,473
	Deferred income (net of direct origination costs)		-53,711		-51,899
	Allowance for loan losses		-91,114		-87,604
	Total	$	12,761,854	$	11,182,970
	Commercial Loans and Leases. Our commercial loan and lease portfolio is comprised of lines of credit for working capital and term loans and leases to finance equipment and other business assets. Our energy production loans are generally collateralized with proven reserves based on appropriate valuation standards. Our commercial loans and leases are underwritten after carefully evaluating and understanding the borrower's ability to operate profitably. Our underwriting standards are designed to promote relationship banking rather than making loans on a transactional basis. Our lines of credit typically are limited to a percentage of the value of the assets securing the line. Lines of credit and term loans typically are reviewed annually and are supported by accounts receivable, inventory, equipment and other assets of our clients' businesses.
	Mortgage Finance Loans. Our mortgage finance loans consist of ownership interests purchased in single-family residential mortgages funded through our warehouse lending group. These interests are typically on our balance sheet for 10 to 20 days or less. We have agreements with mortgage lenders and purchase interests in individual loans they originate. All loans are underwritten consistent with established programs for permanent financing with financially sound investors. Substantially all loans are conforming loans. Balances are stated net of participations sold.
	Construction Loans. Our construction loan portfolio consists primarily of single- and multi-family residential properties and commercial projects used in manufacturing, warehousing, service or retail businesses. Our construction loans generally have terms of one to three years. We typically make construction loans to developers, builders and contractors that have an established record of successful project completion and loan repayment and have a substantial equity investment in the borrowers. However, construction loans are generally based upon estimates of costs and value associated with the completed project. Sources of repayment for these types of loans may be pre-committed permanent loans from other lenders, sales of developed property, or an interim loan commitment from us until permanent financing is obtained. The nature of these loans makes ultimate repayment extremely sensitive to overall economic conditions. Borrowers may not be able to correct conditions of default in loans, increasing risk of exposure to classification, non-performing status, reserve allocation and actual credit loss and foreclosure. These loans typically have floating rates.
	Real Estate Loans. A portion of our real estate loan portfolio is comprised of loans secured by properties other than market risk or investment-type real estate. Market risk loans are real estate loans where the primary source of repayment is expected to come from the sale, permanent financing or lease of the real property collateral. We generally provide temporary financing for commercial and residential property. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Our real estate loans generally have maximum terms of five to seven years, and we provide loans with both floating and fixed rates. We generally avoid long-term loans for commercial real estate held for investment. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Appraised values may be highly variable due to market conditions and the impact of the inability of potential purchasers and lessees to obtain financing and lack of transactions at comparable values.
	Portfolio Geographic Concentration
	As of June 30, 2014, a substantial majority of the principal amount of the loans held for investment in our portfolio was to businesses and individuals in Texas. This geographic concentration subjects the loan portfolio to the general economic conditions within this area. The risks created by this concentration have been considered by management in the determination of the appropriateness of the allowance for loan losses. Management believes the allowance for loan losses is appropriate to cover probable losses inherent in the loan portfolio at each balance sheet date.
	At June 30, 2014 and December 31, 2013, we had a blanket floating lien based on certain real estate loans used as collateral for Federal Home Loan Bank (“FHLB”) borrowings.
	Summary of Loan Loss Experience
	The reserve for loan losses is comprised of specific reserves for impaired loans and an estimate of losses inherent in the portfolio at the balance sheet date, but not yet identified with specified loans. We regularly evaluate our reserve for loan losses to maintain an appropriate level to absorb estimated loan losses inherent in the loan portfolio. Factors contributing to the determination of reserves include the credit worthiness of the borrower, changes in the value of pledged collateral, and general economic conditions. All loan commitments rated substandard or worse and greater than $500,000 are specifically reviewed for loss potential. For loans deemed to be impaired, a specific allocation is assigned based on the losses expected to be realized from those loans. For purposes of determining the general reserve, the portfolio is segregated by product types to recognize differing risk profiles among categories, and then further segregated by credit grades. Credit grades are assigned to all loans. Each credit grade is assigned a risk factor, or reserve allocation percentage. These risk factors are multiplied by the outstanding principal balance and risk-weighted by product type to calculate the required reserve. A similar process is employed to calculate a reserve assigned to off-balance sheet commitments, specifically unfunded loan commitments and letters of credit, and any needed reserve is recorded in other liabilities. Even though portions of the allowance may be allocated to specific loans, the entire allowance is available for any credit that, in management's judgment, should be charged off.
	We have several pass credit grades that are assigned to loans based on varying levels of risk, ranging from credits that are secured by cash or marketable securities, to watch credits which have all the characteristics of an acceptable credit risk but warrant more than the normal level of monitoring. Within our criticized/classified credit grades are special mention, substandard, and doubtful. Special mention loans are those that are currently protected by the current sound worth and paying capacity of the borrower, but that are potentially weak and constitute an additional credit risk. The loan has the potential to deteriorate to a substandard grade due to the existence of financial or administrative deficiencies. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. Some substandard loans are insufficiently protected by the current sound worth and paying capacity of the borrower and of the collateral pledged and may be considered impaired. Substandard loans can be accruing or can be on non-accrual depending on the circumstances of the individual loans. Loans classified as doubtful have all the weaknesses inherent in substandard loans with the added characteristics that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The possibility of loss is extremely high. All doubtful loans are on nonaccrual.
	The reserve allocation percentages assigned to each credit grade have been developed based primarily on an analysis of our historical loss rates. The allocations are adjusted for certain qualitative factors for such things as general economic conditions, changes in credit policies and lending standards. Historical loss rates are adjusted to account for current environmental conditions which we believe are likely to cause loss rates to be higher or lower than past experience. Each quarter we produce an adjustment range for environmental factors unique to us and our market. Changes in the trend and severity of problem loans can cause the estimation of losses to differ from past experience. In addition, the reserve reflects the results of reviews performed by independent third party reviewers as reflected in their confirmations of assigned credit grades within the portfolio. The portion of the allowance that is not derived by the allowance allocation percentages compensates for the uncertainty and complexity in estimating loan and lease losses including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. We evaluate many factors and conditions in determining the unallocated portion of the allowance, including the economic and business conditions affecting key lending areas, credit quality trends and general growth in the portfolio. The allowance is considered appropriate, given management's assessment of potential losses within the portfolio as of the evaluation date, the significant growth in the loan and lease portfolio, current economic conditions in the Company's market areas and other factors.
	The methodology used in the periodic review of reserve adequacy, which is performed at least quarterly, is designed to be dynamic and responsive to changes in portfolio credit quality. The changes are reflected in the general reserve and in specific reserves as the collectability of larger classified loans is evaluated with new information. As our portfolio has matured, historical loss ratios have been closely monitored, and our reserve adequacy relies primarily on our loss history. The review of the reserve adequacy is performed by executive management and presented to a committee of our board of directors for their review. The committee reports to the board as part of the board's review on quarterly basis of the Company's consolidated financial statements.
	The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of June 30, 2014 and December 31, 2013 (in thousands):
	30-Jun-14
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	5,171,053	$	3,700,253	$	1,567,667	$	2,195,165	$	15,790	$	91,205	$	12,741,133
		Special mention		38,450		-		-		9,218		-		183		47,851
		Substandard-accruing		60,320		-		-		11,249		57		4,504		76,130
		Non-accrual		25,545		-		-		15,998		-		22		41,565
	Total loans held for
		investment	$	5,295,368	$	3,700,253	$	1,567,667	$	2,231,630	$	15,847	$	95,914	$	12,906,679
	31-Dec-13
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	4,908,944	$	2,784,265	$	1,261,995	$	2,099,450	$	15,251	$	89,317	$	11,159,222
		Special mention		24,132		-		102		6,338		-		51		30,623
		Substandard-accruing		74,593		-		103		21,770		45		3,742		100,253
		Non-accrual		12,896		-		705		18,670		54		50		32,375
	Total loans held for
		investment	$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
	The following table details activity in the reserve for loan losses by portfolio segment for the six months ended June 30, 2014 and June 30, 2013. Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories.
	30-Jun-14
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance		$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	Provision for loan
		losses		13,714		-		199		-3,891		114		-1,930		-139		8,067
	Charge-offs			7,526		-		-		296		101		-		-		7,923
	Recoveries			2,239		-		-		47		31		1,049		-		3,366
	Net charge-offs
		(recoveries)		5,287		-		-		249		70		-1,049		-		4,557
	Ending balance		$	48,295	$	-	$	14,752	$	20,070	$	193	$	2,224	$	5,580	$	91,114
Period end amount allocated to:
	Loans individually
	evaluated for
	impairment	$	6,293	$	-	$	-	$	722	$	-	$	3	$	-	$	7,018
	Loans collectively
	evaluated for
	impairment		42,002		-		14,752		19,348		193		2,221		5,580		84,096
Ending balance		$	48,295	$	-	$	14,752	$	20,070	$	193	$	2,224	$	5,580	$	91,114
30-Jun-13
(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
Beginning balance		$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
Provision for loan
	losses		13,139		-		615		-2,905		11		343		-2,528		8,675
Charge-offs			4,474		-		-		131		45		-		-		4,650
Recoveries			745		-		-		15		45		261		-		1,066
Net charge-offs
	(recoveries)		3,729		-		-		116		-		-261		-		3,584
Ending balance		$	30,957	$	-	$	12,712	$	27,872	$	237	$	3,064	$	4,586	$	79,428
Period end amount allocated to:
	Loans individually
	evaluated for
	impairment	$	2,934	$	-	$	-	$	548	$	1	$	10	$	-	$	3,493
	Loans collectively
	evaluated for
	impairment		28,023		-		12,712		27,324		236		3,054		4,586		75,935
Ending balance		$	30,957	$	-	$	12,712	$	27,872	$	237	$	3,064	$	4,586	$	79,428
Our recorded investment in loans as of June 30, 2014, December 31, 2013 and June 30, 2013 related to each balance in the allowance for loan losses by portfolio segment and disaggregated on the basis of our impairment methodology was as follows (in thousands):
30-Jun-14
		Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment		$	27,679	$	-	$	-	$	19,790	$	-	$	22	$	47,491
Loans collectively evaluated for impairment			5,267,689		3,700,253		1,567,667		2,211,840		15,847		95,892		12,859,188
Total		$	5,295,368	$	3,700,253	$	1,567,667	$	2,231,630	$	15,847	$	95,914	$	12,906,679
31-Dec-13
		Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment		$	15,139	$	-	$	705	$	24,028	$	54	$	50	$	39,976
Loans collectively evaluated for impairment			5,005,426		2,784,265		1,262,200		2,122,200		15,296		93,110		11,282,497
Total		$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
30-Jun-13
		Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment		$	19,475	$	-	$	-	$	23,666	$	9	$	65	$	43,215
Loans collectively evaluated for impairment			4,451,387		2,838,234		969,071		1,991,378		24,017		77,046		10,351,133
Total		$	4,470,862	$	2,838,234	$	969,071	$	2,015,044	$	24,026	$	77,111	$	10,394,348
We have traditionally maintained an unallocated reserve component to allow for uncertainty in economic and other conditions affecting the quality of the loan portfolio. The unallocated portion of our loan loss reserve has remained consistent since December 31, 2013. We believe the level of unallocated reserves at June 30, 2014 is warranted due to the continued uncertain economic environment which has produced losses, including those resulting from fraud by borrowers, that are not necessarily correlated with historical loss trends or general economic conditions. Our methodology used to calculate the allowance considers historical losses, however, the historical loss rates for specific product types or credit risk grades may not fully incorporate the effects of continued weakness in the economy.
Generally we place loans on non-accrual when there is a clear indication that the borrower's cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining unpaid principal amount of the loan is deemed to be fully collectible. If collectability is questionable, then cash payments are applied to principal. As of June 30, 2014, $480,000 of our non-accrual loans were earning on a cash basis. A loan is placed back on accrual status when both principal and interest are current and it is probable that we will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement. The table below summarizes our non-accrual loans by type and purpose as of June 30, 2014 and December 31, 2013 (in thousands):
	June 30,		December 31,
	2014		2013
Commercial
Business loans	$	24,245	$	12,896
Energy		1,300		-
Construction
Market risk		-		705
Real estate
Market risk		9,539		15,607
Commercial		4,079		508
Secured by 1-4 family		2,380		2,555
Consumer		-		54
Leases		22		50
Total non-accrual loans	$	41,565	$	32,375
As of June 30, 2014, non-accrual loans included in the table above included $16.2 million related to loans that met the criteria for restructured compared to $17.8 million at December 31, 2013.
A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. In accordance with ASC 310 Receivables, we have also included all restructured loans in our impaired loan totals. The following tables detail our impaired loans, by portfolio class as of June 30, 2014 and December 31, 2013 (in thousands)
30-Jun-14
		Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	9,226	$	11,475	$	-	$	5,412	$	-
Energy		425		425		-		609		-
Construction
Market risk		-		-		-		235		-
Real estate
Market risk		8,089		8,089		-		9,936		-
Commercial		3,595		3,595		-		2,023		-
Secured by 1-4 family		1,320		1,320		-		1,320		-
Consumer		-		-		-		-		-
Leases		-		-		-		-		-
Total impaired loans with no allowance
recorded	$	22,655	$	24,904	$	-	$	19,535	$	-
With an allowance recorded:
Commercial
Business loans	$	17,153	$	17,853	$	6,162	$	17,163	$	-
Energy		875		875		131		987		-
Construction
Market risk		-		-		-		-		-
Real estate
Market risk		4,103		4,103		360		5,332		-
Commercial		484		484		73		918		-
Secured by 1-4 family		2,199		2,231		289		2,335		-
Consumer		-		-		-		22		-
Leases		22		22		3		41		-
Total impaired loans with an allowance
recorded	$	24,836	$	25,568	$	7,018	$	26,798	$	-
Combined:
Commercial
Business loans	$	26,379	$	29,328	$	6,162	$	22,575	$	-
Energy		1,300		1,300		131		1,596		-
Construction
Market risk		-		-		-		235		-
Real estate
Market risk		12,192		12,192		360		15,268		-
Commercial		4,079		4,079		73		2,941		-
Secured by 1-4 family		3,519		3,551		289		3,655		-
Consumer		-		-		-		22		-
Leases		22		22		3		41		-
Total impaired loans	$	47,491	$	50,472	$	7,018	$	46,333	$	-
31-Dec-13
		Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	2,005	$	2,005	$	-	$	4,265	$	-
Energy		1,614		3,443		-		969		-
Construction
Market risk		705		705		-		3,111		114
Real estate
Market risk		13,524		13,524		-		9,796		-
Commercial		508		508		-		5,458		-
Secured by 1-4 family		1,320		1,320		-		2,464		-
Consumer		-		-		-		-		-
Leases		-		-		-		-		-
Total impaired loans with no allowance
recorded	$	19,676	$	21,505	$	-	$	26,063	$	114
With an allowance recorded:
Commercial
Business loans	$	11,060	$	12,425	$	1,946	$	14,240	$	-
Energy		460		460		69		913		-
Construction
Market risk		-		-		-		160		-
Real estate
Market risk		6,289		6,289		822		7,912		-
Commercial		-		-		-		477		-
Secured by 1-4 family		2,387		2,387		321		914		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans with an allowance
recorded	$	20,300	$	21,665	$	3,174	$	24,731	$	-
Combined:
Commercial
Business loans	$	13,065	$	14,430	$	1,946	$	18,505	$	-
Energy		2,074		3,903		69		1,882		-
Construction
Market risk		705		705		-		3,271		114
Real estate
Market risk		19,813		19,813		822		17,708		-
Commercial		508		508		-		5,935		-
Secured by 1-4 family		3,707		3,707		321		3,378		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans	$	39,976	$	43,170	$	3,174	$	50,794	$	114
Average impaired loans outstanding during the six months ended June 30, 2014 and 2013 totaled $46.3 million and $56.9 million, respectively.
The table below provides an age analysis of our past due loans that are still accruing as of June 30, 2014 (in thousands):
					Greater
					Than 90
	30-59 Days		60-89 Days		Days and		Total Past
	Past Due		Past Due		Accruing(1)		Due		Current		Total
Commercial
Business loans	$	16,215	$	4,333	$	4,793	$	25,341	$	4,282,751	$	4,308,092
Energy		2,170		-		-		2,170		959,561		961,731
Mortgage finance loans		-		-		-		-		3,700,253		3,700,253
Construction
Market risk		883		-		-		883		1,545,656		1,546,539
Secured by 1-4 family		-		-		-		-		21,128		21,128
Real estate
Market risk		8,328		-		-		8,328		1,645,288		1,653,616
Commercial		6,001		-		-		6,001		464,534		470,535
Secured by 1-4 family		261		-		-		261		91,220		91,481
Consumer		-		-		-		-		15,847		15,847
Leases		-		-		-		-		95,892		95,892
Total loans held for investment	$	33,858	$	4,333	$	4,793	$	42,984	$	12,822,130	$	12,865,114
(1)       Loans past due 90 days and still accruing includes premium finance loans of $4.6 million. These loans are generally secured by obligations of insurance carriers to refund premiums on cancelled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.
Restructured loans are loans on which, due to the borrower's financial difficulties, we have granted a concession that we would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, or a reduction of the face amount of debt, or forgiveness of either principal or accrued interest. As of June 30, 2014 and December 31, 2013, we had $249,000 and $1.9 million, respectively, in loans considered restructured that are not on non-accrual. These loans did not have unfunded commitments at June 30, 2014 or December 31, 2013. Of the non-accrual loans at June 30, 2014 and December 31, 2013, $16.2 million and $17.8 million, respectively, met the criteria for restructured. These loans had no unfunded commitments at their respective balance sheet dates. A loan continues to qualify as restructured until a consistent payment history or change in borrower's financial condition has been evidenced, generally no less than twelve months. Assuming that the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that we are willing to accept for a new extension of credit with comparable risk, then the loan no longer has to be considered a restructuring if it is in compliance with modified terms in calendar years after the year of the restructure.
The following tables summarize, for the six months ended June 30, 2014 and 2013, loans that were restructured during 2014 and 2013 (in thousands):
30-Jun-14				Pre-Restructuring		Post-Restructuring
		Number of		Outstanding Recorded		Outstanding Recorded
		Restructured Loans		Investment		Investment
Real estate - commercial		1	$	1,441	$	1,430
Total new restructured loans in 2014		1	$	1,441	$	1,430
30-Jun-13				Pre-Restructuring		Post-Restructuring
		Number of		Outstanding Recorded		Outstanding Recorded
		Restructured Loans		Investment		Investment
Commercial business loans		1	$	1,945	$	1,898
Total new restructured loans in 2013		1	$	1,945	$	1,898
The restructured loans generally include terms to temporarily place loans on interest only, extend the payment terms or reduce the interest rate. We did not forgive any principal on the above loans. The restructuring of the loans did not have a significant impact on our allowance for loan losses at June 30, 2014 or 2013.
The following table provides information on how restructured loans were modified during the six months ended June 30, 2014 and 2013 (in thousands):
	Six months ended June 30,
	2014		2013
Extended maturity	$	1,430	$	-
Combination of maturity extension and payment schedule adjustment		-		1,898
Total	$	1,430	$	1,898
As of June 30, 2014 and 2013, we did not have any loans that were restructured within the last 12 months that subsequently defaulted.

OREO_and_Valuation_Allowance_f

OREO and Valuation Allowance for Losses on OREO	3 Months Ended
	Jun. 30, 2014
Real Estate Owned, Disclosure of Detailed Components [Abstract]	'
OREO and Valuation Allowance for Losses on OREO	'
	(5) OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO
	The table below presents a summary of the activity related to OREO (in thousands):
		Three months ended June 30,				Six months ended June 30,
			2014		2013		2014		2013
	Beginning balance	$	2,420	$	14,426	$	5,110	$	15,991
	Additions		-		912		851		912
	Sales		-1,735		-1,902		-5,276		-3,396
	Valuation allowance for OREO		-		-164		-		-164
	Direct write-downs		-		-219		-		-290
	Ending balance	$	685	$	13,053	$	685	$	13,053

Financial_Instruments_with_Off

Financial Instruments with Off-Balance Sheet Risk	3 Months Ended
	Jun. 30, 2014
Risks and Uncertainties [Abstract]	'
Financial Instruments with Off-Balance Sheet Risk	'
	(6) FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK
	The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit which involve varying degrees of credit risk in excess of the amount recognized in the consolidated balance sheets. The Bank's exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of these instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management's credit evaluation of the borrower.
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer's credit-worthiness on a case-by-case basis.
	Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.
	The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands):
		30-Jun-14		31-Dec-13
	Commitments to extend credit	$	4,497,052	$	3,674,391
	Standby letters of credit		173,531		145,662

Regulatory_Restrictions

Regulatory Restrictions	3 Months Ended				9 Months Ended
	Jun. 30, 2014				Sep. 30, 2013
Regulatory Capital Requirements [Abstract]	'				'
Regulatory Restrictions	'				'
	(7) REGULATORY MATTERS				Dividends that may be paid by subsidiary banks are routinely restricted by various regulatory authorities. The amount that can be paid in any calendar year without prior approval of the Bank's regulatory agencies cannot exceed the lesser of the net profits (as defined) for that year plus the net profits for the preceding two calendar years, or retained earnings. The Basel III Capital Rules, effective for us on January 1, 2015, will further limit the amount of dividends that may be paid by our bank. No dividends were declared or paid on common stock during the six months ended June 30, 2014 or 2013.
	The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material effect on the Company's and the Bank's financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company's and the Bank's assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company's and the Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.				On March 28, 2013, we completed a sale of 6.0 million shares of 6.5% non-cumulative preferred stock, par value $0.01, with a liquidation preference of $25 per share, in a public offering. Dividends on the preferred stock are not cumulative and will be paid when declared by our board of directors to the extent that we have lawfully available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 6.50% per annum. We paid $4.9 million in dividends on the preferred stock for the six months ended June 30, 2014. Holders of preferred stock will not have voting rights, except with respect to authorizing or increasing the authorized amount of senior stock, certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. Net proceeds from the sale totaled $145.0 million. The additional equity was used for general corporate purposes, including funding regulatory capital infusions into the Bank.
	Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of total and Tier 1 capital to risk-weighted assets, and of Tier 1 capital to average assets, each as defined in the regulations. Management believes, as of June 30, 2014, that the Company and the Bank meet all capital adequacy requirements to which they are subject.				During January 2014, we completed an offering of 1.9 million shares of our common stock. Net proceeds from the sale totaled $106.5 million. On January 31, 2014, the Bank issued $175.0 million of subordinated notes in an offering to institutional investors exempt from registration under Section 3(a)(2) of the Securities Act of 1933 and 12 C.F.R. Part 16. Net proceeds from the transaction were $172.4 million. The notes mature in January 2026 and bear interest at a rate of 5.25% per annum, payable semi-annually. The notes are unsecured and are subordinate to the Bank's obligations to its deposits, its obligations under banker's acceptances and letters of credit, certain obligations to Federal Reserve Banks and the FDIC and the Bank's obligations to its other creditors, except any obligations which expressly rank on a parity with or junior to the notes. The notes are expected to qualify as Tier 2 capital for regulatory capital purposes, subject to applicable limitations. The net proceeds of both offerings were available to the Company for general corporate purposes, including retirement of $15.0 million of short-term debt that was outstanding at December 31, 2013, and additional capital to support continued loan growth.
	Financial institutions are categorized as well capitalized or adequately capitalized, based on minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios. As shown in the table below, the Company's capital ratios exceed the regulatory definition of adequately capitalized as of June 30, 2014 and December 31, 2013. Based upon the information in its most recently filed call report, the Bank meets the capital ratios necessary to be well capitalized. The regulatory authorities can apply changes in classification of assets and such change may retroactively subject the Company to change in capital ratios. Any such change could result in reducing one or more capital ratios below well-capitalized status. In addition, a change may result in imposition of additional assessments by the FDIC or could result in regulatory actions that could have a material effect on condition and results of operations.
	The table below summarizes our capital ratios:
			June 30,	December 31,
			2014	2013
	Company
	Risk-based capital:
		Tier 1 capital	9.09%	9.15%
		Total capital	11.67%	10.73%
	Leverage		10.94%	10.87%

Stockbased_Comensation

Stock-based Comensation	3 Months Ended
	Jun. 30, 2014
Compensation Related Costs [Abstract]	'
Employee Benefits	'
	(8) STOCK-BASED COMPENSATION
	The fair value of our stock option and stock appreciation right (“SAR”) grants are estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management's opinion, the existing models do not necessarily provide the best single measure of the fair value of our employee stock options.
	Stock-based compensation consists of SARs and RSUs granted from 2007 through 2013.
			Three months ended June 30,				Six months ended June 30,
	(in thousands)		2014		2013		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	148	$	134	$	291	$	282
		RSUs		1,118		804		2,237		1,561
	Total compensation expense recognized		$	1,266	$	938	$	2,528	$	1,843
							30-Jun-14
	(in thousands)						Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards						$	-	$	12,252
	Weighted average period over which expense is expected to be
		recognized, in years						N/A		3.6
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended June 30,				Six months ended June 30,
			2014		2013		2014		2013
	Cash-based performance units		$	1,312	$	8,368	$	4,705	$	9,407
			Three months ended June 30,				Six months ended June 30,
	(in thousands)		2014		2013		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	148	$	134	$	291	$	282
		RSUs		1,118		804		2,237		1,561
	Total compensation expense recognized		$	1,266	$	938	$	2,528	$	1,843
							30-Jun-14
	(in thousands)						Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards						$	-	$	12,252
	Weighted average period over which expense is expected to be
		recognized, in years						N/A		3.6
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended June 30,				Six months ended June 30,
			2014		2013		2014		2013
	Cash-based performance units		$	1,312	$	8,368	$	4,705	$	9,407

Discontinued_Operations

Discontinued Operations	3 Months Ended
	Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	(9) DISCONTINUED OPERATIONS
	Subsequent to the end of the first quarter of 2007, we and the purchaser of our residential mortgage loan division (“RML”) agreed to terminate and settle the contractual arrangements related to the sale of the division, which had been completed as of the end of the third quarter of 2006. Historical operating results of RML are reflected as discontinued operations in the financial statements.
	We hold approximately $290,000 in loans held for sale from discontinued operations that are carried at the estimated market value at quarter-end, which is less than the original cost. We plan to sell these loans, but timing and price to be realized cannot be determined at this time due to market conditions. In addition, we continue to address requests from investors related to repurchasing loans previously sold. While the balances as of June 30, 2014 include a liability for exposure to additional contingencies, including the risk of having to repurchase loans previously sold, we recognize that market conditions may result in additional exposure to loss and the extension of time necessary to complete the discontinued mortgage operation.

Fair_Value_Disclosures

Fair Value Disclosures	3 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures	'
	(10) FAIR VALUE DISCLOSURES
	ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and requires enhanced disclosures about fair value measurements. Fair value is defined under ASC 820 as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal market for the asset or liability in an orderly transaction between market participants on the measurement date.
	We determine the fair market values of our assets and liabilities measured at fair value on a recurring and nonrecurring basis using the fair value hierarchy as prescribed in ASC 820. The standard describes three levels of inputs that may be used to measure fair value as provided below.
	Level 1       Quoted prices in active markets for identical assets or liabilities.
	Level 2       Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include U.S. government and agency mortgage-backed debt securities, municipal bonds, and Community Reinvestment Act funds. This category includes derivative assets and liabilities where values are obtained from independent pricing services.
	Level 3       Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair values requires significant management judgment or estimation. This category includes impaired loans and OREO where collateral values have been based on third party appraisals; however, due to current economic conditions, comparative sales data typically used in appraisals may be unavailable or more subjective due to lack of market activity.
	Assets and liabilities measured at fair value at June 30, 2014 and December 31, 2013 are as follows (in thousands):
				Fair Value Measurements Using
	30-Jun-14			Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	36,002	$	-
		Municipals		-		5,952		-
		Equity securities(2)		-		7,376		-
	Loans(3) (5)			-		-		24,068
	OREO(4) (5)			-		-		685
	Derivative assets(6)			-		24,453		-
	Derivative liabilities(6)			-		-24,453		-
	31-Dec-13
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	41,462	$	-
		Municipals		-		14,505		-
		Equity securities(2)		-		7,247		-
	Loans(3) (5)			-		-		13,474
	OREO(4) (5)			-		-		5,110
	Derivative assets(6)			-		9,317		-
	Derivative liabilities(6)			-		-9,317		-
	Securities are measured at fair value on a recurring basis, generally monthly.
	Equity securities consist of Community Reinvestment Act funds.
	Includes impaired loans that have been measured for impairment at the fair value of the loan's collateral.
	OREO is transferred from loans to OREO at fair value less selling costs.
	Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.
	Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.
	Level 3 Valuations
	Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation. Currently, we measure fair value for certain loans and OREO on a nonrecurring basis as described below.
	Loans
	During the three months and six months ended June 30, 2014, certain impaired loans were reevaluated and reported at fair value through a specific allocation of the allowance for loan losses based upon the fair value of the underlying collateral. The $24.1 million total above includes impaired loans at June 30, 2014 with a carrying value of $29.2 million that were reduced by specific allowance allocations totaling $5.1 million for a total reported fair value of $24.1 million based on collateral valuations utilizing Level 3 valuation inputs. Fair values were based on third party appraisals.
	OREO
	Certain foreclosed assets, upon initial recognition, are valued based on third party appraisals less estimated selling costs. At June 30, 2014, OREO had a carrying value of $685,000 with no specific valuation allowance. The fair value of OREO was computed based on third party appraisals, which are Level 3 valuation inputs.
	Fair Value of Financial Instruments
	Generally accepted accounting principles require disclosure of fair value information about financial instruments, whether or not recognized on the balance sheet, for which it is practical to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. This disclosure does not and is not intended to represent the fair value of the Company.
	A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands):
			30-Jun-14					31-Dec-13
			Carrying		Estimated			Carrying		Estimated
			Amount		Fair Value			Amount		Fair Value
	Cash and cash equivalents	$	357,142	$	357,142		$	153,911	$	153,911
	Securities, available-for-sale		49,330		49,330			63,214		63,214
	Loans held for sale from discontinued operations		290		290			294		294
	Loans held for investment, net		12,761,854		12,766,383			11,182,970		11,179,145
	Derivative assets		24,453		24,453			9,317		9,317
	Deposits		10,757,316		10,757,495			9,257,379		9,257,574
	Federal funds purchased		273,041		273,041			148,650		148,650
	Customer repurchase agreements		27,491		27,491			21,954		21,954
	Other borrowings		700,016		700,016			855,026		855,026
	Subordinated notes		286,000		286,066			111,000		96,647
	Trust preferred subordinated debentures		113,406		113,406			113,406		113,406
	Derivative liabilities		24,453		24,453			9,317		9,317
	The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments:
	Cash and cash equivalents
	The carrying amounts reported in the consolidated balance sheet for cash and cash equivalents approximate their fair value, which is characterized as a Level 1 asset in the fair value hierarchy.
	Securities
	The fair value of investment securities is based on prices obtained from independent pricing services which are based on quoted market prices for the same or similar securities, which is characterized as a Level 2 asset in the fair value hierarchy. We have obtained documentation from the primary pricing service we use about their processes and controls over pricing. In addition, on a quarterly basis we independently verify the prices that we receive from the service provider using two additional independent pricing sources. Any significant differences are investigated and resolved.
	Loans, net
	Loans are characterized as Level 3 assets in the fair value hierarchy. For variable-rate loans that reprice frequently with no significant change in credit risk, fair values are generally based on carrying values. The fair value for all other loans is estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. The carrying amount of accrued interest approximates its fair value. The carrying amount of loans held for sale approximates fair value.
Derivatives
The estimated fair value of the interest rate swaps are obtained from independent pricing services based on quote market prices for the same or similar derivative contracts and are characterized as a Level 2 asset in the fair value hierarchy. On a quarterly basis, we independently verify the fair value using an additional independent pricing source.
Deposits
Deposits are characterized as Level 3 liabilities in the fair value hierarchy. The carrying amounts for variable-rate money market accounts approximate their fair value. Fixed-term certificates of deposit fair values are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities.
Federal funds purchased, customer repurchase agreements, other borrowings, subordinated notes and trust preferred subordinated debentures
The carrying value reported in the consolidated balance sheet for Federal funds purchased, customer repurchase agreements and other short-term, floating rate borrowings approximates their fair value, which is characterized as a Level 1 asset in the fair value hierarchy. The fair value of any fixed rate short-term borrowings and trust preferred subordinated debentures are estimated using a discounted cash flow calculation that applies interest rates currently being offered on similar borrowings, which is characterized as a Level 3 liability in the fair value hierarchy. The subordinated notes are publicly traded and are valued based on market prices, which is characterized as a Level 2 liability in the fair value hierarchy.

Derivative_Financial_Instrumen

Derivative Financial Instruments	3 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	(11) DERIVATIVE FINANCIAL INSTRUMENTS
	The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets.
	During 2014 and 2013, we entered into certain interest rate derivative positions that are not designated as hedging instruments. These derivative positions relate to transactions in which we enter into an interest rate swap, cap and/or floor with a customer while at the same time entering into an offsetting interest rate swap, cap and/or floor with another financial institution. In connection with each swap transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate. Because we act as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on our results of operations.
	The notional amounts and estimated fair values of interest rate derivative positions outstanding at June 30, 2014 and December 31, 2013 are presented in the following tables (in thousands):
			30-Jun-14				31-Dec-13
				Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
	Non-hedging interest rate derivative:
		Commercial loan/lease interest rate swaps	$	835,562	$	23,422	$	764,939	$	8,652
		Commercial loan/lease interest rate swaps		-835,562		-23,422		-764,939		-8,652
		Commercial loan/lease interest rate caps		-54,428		-1,031		-58,706		-665
		Commercial loan/lease interest rate caps		54,428		1,031		58,706		665
	The weighted-average receive and pay interest rates for interest rate swaps outstanding at June 30, 2014 were as follows:
		30-Jun-14		31-Dec-13
		Weighted-Average Interest Rate		Weighted-Average Interest Rate
		Received	Paid	Received	Paid
	Non-hedging interest rate swaps	4.84%	2.85%	2.99%	4.89%
	The weighted-average strike rate for outstanding interest rate caps was 1.51% at June 30, 2014 and 1.87% at December 31, 2013.
	Our credit exposure on interest rate swaps and caps is limited to the net favorable value and interest payments of all swaps and caps by each counterparty. In such cases collateral may be required from the counterparties involved if the net value of the swaps and caps exceeds a nominal amount considered to be immaterial. Our credit exposure, net of any collateral pledged, relating to interest rate swaps and caps was approximately $24.5 million at June 30, 2014 and approximately $9.3 million at December 31, 2013, all of which relates to bank customers. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap and cap values. At June 30, 2014 and December 31, 2013, we had $23.5 million and $10.7 million, respectively, in cash collateral pledged for these derivatives included in interest-bearing deposits.

Stockholders_Equity

Stockholder's Equity	3 Months Ended
	Jun. 30, 2014
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	(12) STOCKHOLDERS' EQUITY
	On March 28, 2013, we completed a sale of 6.0 million shares of 6.5% non-cumulative preferred stock, par value $0.01, with a liquidation preference of $25 per share, in a public offering. Dividends on the preferred stock are not cumulative and will be paid if and when declared by our board of directors to the extent that we have lawfully available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 6.50% per annum. For the six months ended June 30, 2014, we paid $4.9 million in dividends on the preferred stock. Holders of preferred stock do not have voting rights, except with respect to authorizing or increasing the authorized amount of senior stock, certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. Net proceeds from the sale totaled $145.0 million. The proceeds were used for general corporate purposes, including funding regulatory capital infusions into the Bank.
	During January 2014, we completed an offering of 1.9 million shares of our common stock. Net proceeds from the sale totaled $106.5 million. The net proceeds of the offering were available to the Company for general corporate purposes, including retirement of $15.0 million of short-term debt that was outstanding at December 31, 2013, and additional capital to support continued loan growth.

New_Accounting_Pronouncements

New Accounting Pronouncements	3 Months Ended
	Jun. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
New Accounting Standards	'
	(13) NEW ACCOUNTING PRONOUNCEMENTS
	ASU 2014-04 “Receivables (Topic 310) – Troubled Debt Restructurings by Creditors” (“ASU 2014-04”) amends Topic 310 “Receivables” to clarify the terms defining when an in substance repossession or foreclosure occurs, which determines when the receivable should be derecognized and the real estate property is recognized. ASU 2013-04 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2014. It is not expected to have a significant impact on our financial statements.

Summary_of_Significant_Account

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Nature of Business	'
	Organization and Nature of Business
	Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional or national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas.
Basis of Presentation	'
	Basis of Presentation
	Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.
	The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2013, included in our Annual Report on Form 10-K filed with the SEC on February 20, 2014 (the “2013 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.
Use of Estimates	'
	Use of Estimates
	The preparation of 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 financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.
Correction of an Error in the Financial Statements	'
	Correction of an Error in the Financial Statements
	We determined during the fourth quarter of 2013 that purchases and sales of mortgage finance loan interests that had been reported on our consolidated statements of cash flows as cash flows from operating activities should have been reported as investing activities because the related asset balances should have been reported as held for investment rather than held for sale on our consolidated balance sheets.
	We have corrected the classification of these assets on the consolidated balance sheets to reflect them as held for investment. We have corrected the previously presented cash flows for these loans and in doing so the consolidated statements of cash flows for the six months ended June 30, 2013 were adjusted to decrease net cash flows from operating activities by $337.0 million, with a corresponding increase in net cash flows from investing activities. The change does not impact our reported earnings as we do not believe any reserve for loan losses relating to the mortgage finance portfolio is necessary based upon the risk profile of the assets and the less than one basis point loss experience of the program over the last ten years. This reclassification does not change total loans or total assets on our consolidated balance sheets. We have evaluated the effect of the incorrect presentation, both qualitatively and quantitatively, and concluded that it did not materially misstate our previously issued financial statements.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash equivalents include amounts due from banks, interest-bearing deposits and Federal funds sold
Securities	'
	Securities
	Securities are classified as trading, available-for-sale or held-to-maturity. Management classifies securities at the time of purchase and re-assesses such designation at each balance sheet date; however, transfers between categories from this re-assessment are rare.
	Trading Account
	Securities acquired for resale in anticipation of short-term market movements are classified as trading, with realized and unrealized gains and losses recognized in income. To date, we have not had any activity in our trading account.
	Held-to-Maturity and Available-for-Sale
	Debt securities are classified as held-to-maturity when we have the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost. Debt securities not classified as held-to-maturity or trading and marketable equity securities not classified as trading are classified as available-for-sale.
	Available-for-sale securities are stated at fair value, with the unrealized gains and losses reported in a separate component of accumulated other comprehensive income (loss), net of tax. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, or in the case of mortgage-backed securities, over the estimated life of the security. Such amortization and accretion is included in interest income from securities. Realized gains and losses and declines in value judged to be other-than-temporary are included in gain (loss) on sale of securities. The cost of securities sold is based on the specific identification method.
	All securities are available-for-sale as of June 30, 2014 and December 31, 2013.
Allowance for Loan Losses	'
	Allowance for Loan Losses
	The allowance for loan losses is established through a provision for loan losses charged against income. The allowance for loan losses includes specific reserves for impaired loans and a general reserve for estimated losses inherent in the loan portfolio at the balance sheet date, but not yet identified with specific loans. Loans deemed to be uncollectible are charged against the allowance when management believes that the collectibility of the principal is unlikely and subsequent recoveries, if any, are credited to the allowance. Management's periodic evaluation of the adequacy of the allowance is based on an assessment of the current loan portfolio, including known inherent risks, adverse situations that may affect the borrowers' ability to repay, the estimated value of any underlying collateral and current economic conditions.
Other Real Estate Owned	'
	Other Real Estate Owned
	Other real estate owned (“OREO”), which is included in other assets on the balance sheet, consists of real estate that has been foreclosed. Real estate that has been foreclosed is recorded at the fair value of the real estate, less selling costs, through a charge to the allowance for loan losses, if necessary. Subsequent write-downs required for declines in value are recorded through a valuation allowance, or taken directly to the asset, charged to other non-interest expense.
Premises and Equipment	'
	Premises and Equipment
	Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from three to ten years. Gains or losses on disposals of premises and equipment are included in results of operations.
Marketing and Software	'
	Marketing and Software
	Marketing costs are expensed as incurred. Ongoing maintenance and enhancements of websites are expensed as incurred. Costs incurred in connection with development or purchase of internal use software are capitalized and amortized over a period not to exceed five years. Internal use software costs are included in other assets in the consolidated financial statements.
Goodwill and Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Our intangible assets relate primarily to loan customer relationships. Intangible assets with definite useful lives are amortized on an accelerated basis over their estimated life. Intangible assets are tested for impairment annually or whenever events or changes in circumstances indicate the carrying amount of the assets may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
Segment Reporting	'
	Segment Reporting
	We have determined that all of our lending divisions and subsidiaries meet the aggregation criteria of ASC 280, Segment Reporting, since all offer similar products and services, operate with similar processes, and have similar customers.
Stock-based Compensation	'
	Stock-based Compensation
	We account for all stock-based compensation transactions in accordance with ASC 718, Compensation – Stock Compensation (“ASC 718”), which requires that stock compensation transactions be recognized as compensation expense in the statement of operations based on their fair values on the measurement date, which is the date of the grant.
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income
	Unrealized gains or losses on our available-for-sale securities (after applicable income tax expense or benefit) are included in accumulated other comprehensive income, net. Other comprehensive income (loss), net of tax, for the six months ended June 30, 2014 and 2013 is reported in the accompanying consolidated statements of stockholders' equity and consolidated statements of income and other comprehensive income.
Income Taxes	'
	Income Taxes
	The Company and its subsidiary file a consolidated federal income tax return. We utilize the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based upon the difference between the values of the assets and liabilities as reflected in the financial statements and their related tax basis using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled. As changes in tax law or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. A valuation reserve is provided against deferred tax assets unless it is more likely than not that such deferred tax assets will be realized.
Basic and Diluted Earnings Per Common Share	'
	Basic and Diluted Earnings Per Common Share
	Basic earnings per common share is based on net income available to common stockholders divided by the weighted-average number of common shares outstanding during the period excluding non-vested stock awards. Diluted earnings per common share include the dilutive effect of stock options and non-vested stock awards using the treasury stock method. A reconciliation of the weighted-average shares used in calculating basic earnings per common share and the weighted average common shares used in calculating diluted earnings per common share for the reported periods is provided in Note 2 – Earnings Per Common Share.
Fair Values of Financial Instruments	'
	Fair Values of Financial Instruments
	ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and enhances disclosures about fair value measurements. In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of computation of basic and diluted earnings per share	'
				Three months ended June 30,				Six months ended June 30,
					2014		2013		2014		2013
	Numerator:
		Net income from continuing operations		$	33,418	$	24,072	$	61,679	$	57,216
		Preferred stock dividends			2,437		2,438		4,875		2,519
		Net income from continuing operations
			available to common stockholders		30,981		21,634		56,804		54,697
		Income from discontinued operations			3		1		7		-
		Net income		$	30,984	$	21,635	$	56,811	$	54,697
	Denominator:
		Denominator for basic earnings per share -
			weighted average shares		43,075,213		40,813,918		42,735,580		40,784,769
		Effect of employee stock-based awards(1)			336,993		415,049		359,794		436,219
		Effect of warrants to purchase common stock			432,809		494,558		486,113		496,464
		Denominator for dilutive earnings per share -
			adjusted weighted average shares and
			assumed conversions		43,845,015		41,723,525		43,581,487		41,717,452
	Basic earnings per common share from
		continuing operations		$	0.72	$	0.53	$	1.33	$	1.34
	Basic earnings per common share			$	0.72	$	0.53	$	1.33	$	1.34
	Diluted earnings per share from continuing
		operations		$	0.71	$	0.52	$	1.3	$	1.31
	Diluted earnings per common share			$	0.71	$	0.52	$	1.3	$	1.31

Securities_Tables

Securities (Tables)	3 Months Ended
	Jun. 30, 2014
Available-for-sale Securities [Abstract]	'
Schedule of summary of securities	'
	The following is a summary of securities (in thousands):
					30-Jun-14
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	33,491	$	2,511	$	-	$	36,002
		Municipals			5,930		22		-		5,952
		Equity securities(1)			7,522		11		-157		7,376
				$	46,943	$	2,544	$	-157	$	49,330
					31-Dec-13
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	38,786	$	2,676	$	-	$	41,462
		Municipals			14,401		104		-		14,505
		Equity securities(1)			7,522		-		-275		7,247
				$	60,709	$	2,780	$	-275	$	63,214
Schedule of amortized cost and estimated fair value of securities	'
					30-Jun-14
							After One		After Five
					Less Than		Through		Through		After Ten
					One Year		Five Years		Ten Years		Years		Total
	Available-for-sale:
		Residential mortgage-backed
			securities:(1)
			Amortized cost	$	13	$	11,711	$	6,504	$	15,263	$	33,491
			Estimated fair value		13		12,447		7,266		16,276		36,002
			Weighted average yield(3)		6.50%		4.80%		5.53%		2.36%		3.83%
		Municipals:(2)
			Amortized cost		3,614		2,316		-		-		5,930
			Estimated fair value		3,627		2,325		-		-		5,952
			Weighted average yield(3)		5.85%		5.75%		-		-		5.92%
		Equity securities:(4)
			Amortized cost		7,522		-		-		-		7,522
			Estimated fair value		7,376		-		-		-		7,376
		Total available-for-sale securities:
			Amortized cost									$	46,943
			Estimated fair value									$	49,330
					31-Dec-13
							After One		After Five
					Less Than		Through		Through		After Ten
					One Year		Five Years		Ten Years		Years		Total
	Available-for-sale:
		Residential mortgage-backed
			securities:(1)
			Amortized cost	$	238	$	14,720	$	7,718	$	16,110	$	38,786
			Estimated fair value		252		15,641		8,456		17,113		41,462
			Weighted average yield(3)		4.32%		4.78%		5.56%		2.40%		3.94%
		Municipals:(2)
			Amortized cost		7,749		6,652		-		-		14,401
			Estimated fair value		7,818		6,687		-		-		14,505
			Weighted average yield(3)		5.76%		5.71%		-		-		5.73%
		Equity securities:(4)
			Amortized cost		7,522		-		-		-		7,522
			Estimated fair value		7,247		-		-		-		7,247
		Total available-for-sale securities:
			Amortized cost									$	60,709
			Estimated fair value									$	63,214
Schedule of investment securities that have been in a continuous unrealized loss position for less or more than 12 months	'
	30-Jun-14	Less Than 12 Months					12 Months or Longer					Total
		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
	Equity securities	$	-	$	-		$	6,343	$	-157		$	6,343	$	-157
	31-Dec-13	Less Than 12 Months					12 Months or Longer					Total
		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
	Equity securities	$	7,247	$	-275		$	-	$	-		$	7,247	$	-275

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]	'
Schedule of loans held for investments	'
	(4) LOANS AND ALLOWANCE FOR LOAN LOSSES
	At June 30, 2014 and December 31, 2013, loans were as follows (in thousands):
			June 30,		December 31,
			2014		2013
	Commercial	$	5,295,368	$	5,020,565
	Mortgage finance		3,700,253		2,784,265
	Construction		1,567,667		1,262,905
	Real estate		2,231,630		2,146,228
	Consumer		15,847		15,350
	Leases		95,914		93,160
	Gross loans held for investment		12,906,679		11,322,473
	Deferred income (net of direct origination costs)		-53,711		-51,899
	Allowance for loan losses		-91,114		-87,604
	Total	$	12,761,854	$	11,182,970
Schedule of the credit risk profile of loan portfolio by internally assigned grades and nonaccrual status	'
	30-Jun-14
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	5,171,053	$	3,700,253	$	1,567,667	$	2,195,165	$	15,790	$	91,205	$	12,741,133
		Special mention		38,450		-		-		9,218		-		183		47,851
		Substandard-accruing		60,320		-		-		11,249		57		4,504		76,130
		Non-accrual		25,545		-		-		15,998		-		22		41,565
	Total loans held for
		investment	$	5,295,368	$	3,700,253	$	1,567,667	$	2,231,630	$	15,847	$	95,914	$	12,906,679
	31-Dec-13
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	4,908,944	$	2,784,265	$	1,261,995	$	2,099,450	$	15,251	$	89,317	$	11,159,222
		Special mention		24,132		-		102		6,338		-		51		30,623
		Substandard-accruing		74,593		-		103		21,770		45		3,742		100,253
		Non-accrual		12,896		-		705		18,670		54		50		32,375
	Total loans held for
		investment	$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
Schedule of activity in the reserve for loan losses by portfolio segment	'
	30-Jun-14
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance		$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	Provision for loan
		losses		13,714		-		199		-3,891		114		-1,930		-139		8,067
	Charge-offs			7,526		-		-		296		101		-		-		7,923
	Recoveries			2,239		-		-		47		31		1,049		-		3,366
	Net charge-offs
		(recoveries)		5,287		-		-		249		70		-1,049		-		4,557
	Ending balance		$	48,295	$	-	$	14,752	$	20,070	$	193	$	2,224	$	5,580	$	91,114
	Period end amount allocated to:
		Loans individually
		evaluated for
		impairment	$	6,293	$	-	$	-	$	722	$	-	$	3	$	-	$	7,018
		Loans collectively
		evaluated for
		impairment		42,002		-		14,752		19,348		193		2,221		5,580		84,096
	Ending balance		$	48,295	$	-	$	14,752	$	20,070	$	193	$	2,224	$	5,580	$	91,114
	30-Jun-13
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance		$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
	Provision for loan
		losses		13,139		-		615		-2,905		11		343		-2,528		8,675
	Charge-offs			4,474		-		-		131		45		-		-		4,650
	Recoveries			745		-		-		15		45		261		-		1,066
	Net charge-offs
		(recoveries)		3,729		-		-		116		-		-261		-		3,584
	Ending balance		$	30,957	$	-	$	12,712	$	27,872	$	237	$	3,064	$	4,586	$	79,428
	Period end amount allocated to:
		Loans individually
		evaluated for
		impairment	$	2,934	$	-	$	-	$	548	$	1	$	10	$	-	$	3,493
		Loans collectively
		evaluated for
		impairment		28,023		-		12,712		27,324		236		3,054		4,586		75,935
	Ending balance		$	30,957	$	-	$	12,712	$	27,872	$	237	$	3,064	$	4,586	$	79,428
Schedule Of Financing Receivables Related To Allowance For Loan Losses By Portfolio Category Disaggregated Based On Impairment Methodology [Table Text Block]	'
	30-Jun-14
			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Loans individually evaluated for impairment		$	27,679	$	-	$	-	$	19,790	$	-	$	22	$	47,491
	Loans collectively evaluated for impairment			5,267,689		3,700,253		1,567,667		2,211,840		15,847		95,892		12,859,188
	Total		$	5,295,368	$	3,700,253	$	1,567,667	$	2,231,630	$	15,847	$	95,914	$	12,906,679
	31-Dec-13
			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Loans individually evaluated for impairment		$	15,139	$	-	$	705	$	24,028	$	54	$	50	$	39,976
	Loans collectively evaluated for impairment			5,005,426		2,784,265		1,262,200		2,122,200		15,296		93,110		11,282,497
	Total		$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
	30-Jun-13
			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Loans individually evaluated for impairment		$	19,475	$	-	$	-	$	23,666	$	9	$	65	$	43,215
	Loans collectively evaluated for impairment			4,451,387		2,838,234		969,071		1,991,378		24,017		77,046		10,351,133
	Total		$	4,470,862	$	2,838,234	$	969,071	$	2,015,044	$	24,026	$	77,111	$	10,394,348
Schedule of non-accrual loans by type and purpose	'
		June 30,		December 31,
		2014		2013
	Commercial
	Business loans	$	24,245	$	12,896
	Energy		1,300		-
	Construction
	Market risk		-		705
	Real estate
	Market risk		9,539		15,607
	Commercial		4,079		508
	Secured by 1-4 family		2,380		2,555
	Consumer		-		54
	Leases		22		50
	Total non-accrual loans	$	41,565	$	32,375
Schedule of impaired loans, by portfolio class	'
	30-Jun-14
			Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	With no related allowance recorded:
	Commercial
	Business loans	$	9,226	$	11,475	$	-	$	5,412	$	-
	Energy		425		425		-		609		-
	Construction
	Market risk		-		-		-		235		-
	Real estate
	Market risk		8,089		8,089		-		9,936		-
	Commercial		3,595		3,595		-		2,023		-
	Secured by 1-4 family		1,320		1,320		-		1,320		-
	Consumer		-		-		-		-		-
	Leases		-		-		-		-		-
	Total impaired loans with no allowance
	recorded	$	22,655	$	24,904	$	-	$	19,535	$	-
	With an allowance recorded:
	Commercial
	Business loans	$	17,153	$	17,853	$	6,162	$	17,163	$	-
	Energy		875		875		131		987		-
	Construction
	Market risk		-		-		-		-		-
	Real estate
	Market risk		4,103		4,103		360		5,332		-
	Commercial		484		484		73		918		-
	Secured by 1-4 family		2,199		2,231		289		2,335		-
	Consumer		-		-		-		22		-
	Leases		22		22		3		41		-
	Total impaired loans with an allowance
	recorded	$	24,836	$	25,568	$	7,018	$	26,798	$	-
	Combined:
	Commercial
	Business loans	$	26,379	$	29,328	$	6,162	$	22,575	$	-
	Energy		1,300		1,300		131		1,596		-
	Construction
	Market risk		-		-		-		235		-
	Real estate
	Market risk		12,192		12,192		360		15,268		-
	Commercial		4,079		4,079		73		2,941		-
	Secured by 1-4 family		3,519		3,551		289		3,655		-
	Consumer		-		-		-		22		-
	Leases		22		22		3		41		-
	Total impaired loans	$	47,491	$	50,472	$	7,018	$	46,333	$	-
	31-Dec-13
			Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	With no related allowance recorded:
	Commercial
	Business loans	$	2,005	$	2,005	$	-	$	4,265	$	-
	Energy		1,614		3,443		-		969		-
	Construction
	Market risk		705		705		-		3,111		114
	Real estate
	Market risk		13,524		13,524		-		9,796		-
	Commercial		508		508		-		5,458		-
	Secured by 1-4 family		1,320		1,320		-		2,464		-
	Consumer		-		-		-		-		-
	Leases		-		-		-		-		-
	Total impaired loans with no allowance
	recorded	$	19,676	$	21,505	$	-	$	26,063	$	114
	With an allowance recorded:
	Commercial
	Business loans	$	11,060	$	12,425	$	1,946	$	14,240	$	-
	Energy		460		460		69		913		-
Construction
Market risk		-		-		-		160		-
Real estate
Market risk		6,289		6,289		822		7,912		-
Commercial		-		-		-		477		-
Secured by 1-4 family		2,387		2,387		321		914		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans with an allowance
recorded	$	20,300	$	21,665	$	3,174	$	24,731	$	-
Combined:
Commercial
Business loans	$	13,065	$	14,430	$	1,946	$	18,505	$	-
Energy		2,074		3,903		69		1,882		-
Construction
Market risk		705		705		-		3,271		114
Real estate
Market risk		19,813		19,813		822		17,708		-
Commercial		508		508		-		5,935		-
Secured by 1-4 family		3,707		3,707		321		3,378		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans	$	39,976	$	43,170	$	3,174	$	50,794	$	114
Schedule of an age analysis of accruing past due loans	'
						Greater
						Than 90
		30-59 Days		60-89 Days		Days and		Total Past
		Past Due		Past Due		Accruing(1)		Due		Current		Total
	Commercial
	Business loans	$	16,215	$	4,333	$	4,793	$	25,341	$	4,282,751	$	4,308,092
	Energy		2,170		-		-		2,170		959,561		961,731
	Mortgage finance loans		-		-		-		-		3,700,253		3,700,253
	Construction
	Market risk		883		-		-		883		1,545,656		1,546,539
	Secured by 1-4 family		-		-		-		-		21,128		21,128
	Real estate
	Market risk		8,328		-		-		8,328		1,645,288		1,653,616
	Commercial		6,001		-		-		6,001		464,534		470,535
	Secured by 1-4 family		261		-		-		261		91,220		91,481
	Consumer		-		-		-		-		15,847		15,847
	Leases		-		-		-		-		95,892		95,892
	Total loans held for investment	$	33,858	$	4,333	$	4,793	$	42,984	$	12,822,130	$	12,865,114
Schedule of loans that have been restructured	'
	30-Jun-14				Pre-Restructuring		Post-Restructuring
			Number of		Outstanding Recorded		Outstanding Recorded
			Restructured Loans		Investment		Investment
	Real estate - commercial		1	$	1,441	$	1,430
	Total new restructured loans in 2014		1	$	1,441	$	1,430
	30-Jun-13				Pre-Restructuring		Post-Restructuring
			Number of		Outstanding Recorded		Outstanding Recorded
			Restructured Loans		Investment		Investment
	Commercial business loans		1	$	1,945	$	1,898
	Total new restructured loans in 2013		1	$	1,945	$	1,898
		Six months ended June 30,
		2014		2013
	Extended maturity	$	1,430	$	-
	Combination of maturity extension and payment schedule adjustment		-		1,898
	Total	$	1,430	$	1,898

OREO_and_Valuation_Allowance_f1

OREO and Valuation Allowance for Losses on OREO (Tables)	3 Months Ended
	Jun. 30, 2014
Real Estate Owned, Disclosure of Detailed Components [Abstract]	'
Schedule of the activity related to OREO	'
	(5) OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO
	The table below presents a summary of the activity related to OREO (in thousands):
		Three months ended June 30,				Six months ended June 30,
			2014		2013		2014		2013
	Beginning balance	$	2,420	$	14,426	$	5,110	$	15,991
	Additions		-		912		851		912
	Sales		-1,735		-1,902		-5,276		-3,396
	Valuation allowance for OREO		-		-164		-		-164
	Direct write-downs		-		-219		-		-290
	Ending balance	$	685	$	13,053	$	685	$	13,053

Financial_Instruments_with_Off1

Financial Instruments with Off-Balance Sheet Risk (Tables)	3 Months Ended
	Jun. 30, 2014
Risks and Uncertainties [Abstract]	'
Schedule of financial instruments with off-balance sheet risk	'
		30-Jun-14		31-Dec-13
	Commitments to extend credit	$	4,497,052	$	3,674,391
	Standby letters of credit		173,531		145,662

Regulatory_Restrictions_Tables

Regulatory Restrictions (Tables)	3 Months Ended
	Jun. 30, 2014
Regulatory Capital Requirements [Abstract]	'
Schedule of compliance with Regulatory Capital Requirements	'
			June 30,	December 31,
			2014	2013
	Company
	Risk-based capital:
		Tier 1 capital	9.09%	9.15%
		Total capital	11.67%	10.73%
	Leverage		10.94%	10.87%

Stockbased_Compensation_Tables

Stock-based Compensation (Tables)	3 Months Ended
	Jun. 30, 2014
Compensation Related Costs [Abstract]	'
Schedule of share-based compensation expense	'
	(8) STOCK-BASED COMPENSATION
	The fair value of our stock option and stock appreciation right (“SAR”) grants are estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management's opinion, the existing models do not necessarily provide the best single measure of the fair value of our employee stock options.
	Stock-based compensation consists of SARs and RSUs granted from 2007 through 2013.
			Three months ended June 30,				Six months ended June 30,
	(in thousands)		2014		2013		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	148	$	134	$	291	$	282
		RSUs		1,118		804		2,237		1,561
	Total compensation expense recognized		$	1,266	$	938	$	2,528	$	1,843
							30-Jun-14
	(in thousands)						Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards						$	-	$	12,252
	Weighted average period over which expense is expected to be
		recognized, in years						N/A		3.6
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended June 30,				Six months ended June 30,
			2014		2013		2014		2013
	Cash-based performance units		$	1,312	$	8,368	$	4,705	$	9,407
			Three months ended June 30,				Six months ended June 30,
	(in thousands)		2014		2013		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	148	$	134	$	291	$	282
		RSUs		1,118		804		2,237		1,561
	Total compensation expense recognized		$	1,266	$	938	$	2,528	$	1,843
							30-Jun-14
	(in thousands)						Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards						$	-	$	12,252
	Weighted average period over which expense is expected to be
		recognized, in years						N/A		3.6
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended June 30,				Six months ended June 30,
			2014		2013		2014		2013
	Cash-based performance units		$	1,312	$	8,368	$	4,705	$	9,407

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	3 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities measured at fair value on a recurring and nonrecurring basis	'
				Fair Value Measurements Using
	30-Jun-14			Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	36,002	$	-
		Municipals		-		5,952		-
		Equity securities(2)		-		7,376		-
	Loans(3) (5)			-		-		24,068
	OREO(4) (5)			-		-		685
	Derivative assets(6)			-		24,453		-
	Derivative liabilities(6)			-		-24,453		-
	31-Dec-13
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	41,462	$	-
		Municipals		-		14,505		-
		Equity securities(2)		-		7,247		-
	Loans(3) (5)			-		-		13,474
	OREO(4) (5)			-		-		5,110
	Derivative assets(6)			-		9,317		-
	Derivative liabilities(6)			-		-9,317		-
Schedule of a summary of the carrying amounts and estimated fair values of financial instruments	'
			30-Jun-14					31-Dec-13
			Carrying		Estimated			Carrying		Estimated
			Amount		Fair Value			Amount		Fair Value
	Cash and cash equivalents	$	357,142	$	357,142		$	153,911	$	153,911
	Securities, available-for-sale		49,330		49,330			63,214		63,214
	Loans held for sale from discontinued operations		290		290			294		294
	Loans held for investment, net		12,761,854		12,766,383			11,182,970		11,179,145
	Derivative assets		24,453		24,453			9,317		9,317
	Deposits		10,757,316		10,757,495			9,257,379		9,257,574
	Federal funds purchased		273,041		273,041			148,650		148,650
	Customer repurchase agreements		27,491		27,491			21,954		21,954
	Other borrowings		700,016		700,016			855,026		855,026
	Subordinated notes		286,000		286,066			111,000		96,647
	Trust preferred subordinated debentures		113,406		113,406			113,406		113,406
	Derivative liabilities		24,453		24,453			9,317		9,317

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of notional amounts and estimated fair values of interest rate derivatives	'
			30-Jun-14				31-Dec-13
				Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
	Non-hedging interest rate derivative:
		Commercial loan/lease interest rate swaps	$	835,562	$	23,422	$	764,939	$	8,652
		Commercial loan/lease interest rate swaps		-835,562		-23,422		-764,939		-8,652
		Commercial loan/lease interest rate caps		-54,428		-1,031		-58,706		-665
		Commercial loan/lease interest rate caps		54,428		1,031		58,706		665
Schedule of the weighted-average receive and pay interest rate swaps	'
		30-Jun-14		31-Dec-13
		Weighted-Average Interest Rate		Weighted-Average Interest Rate
		Received	Paid	Received	Paid
	Non-hedging interest rate swaps	4.84%	2.85%	2.99%	4.89%

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net income from continuing operations	$33,418	$24,072	$61,679	$57,216
Preferred stock dividends	2,437	2,438	4,875	2,519
Net income from continuing operations available to common shareholders	30,981	21,634	56,804	54,697
Income (loss) from discontinued operations	3	1	7	0
Net income available to common shareholders	$30,984	$21,635	$56,811	$54,697
Denominator:	'	'	'	'
Denominator for basic earnings per share - weighted average shares	43,075,213	40,813,918	42,735,580	40,784,769
Effect of employee stock-based awards	336,993	415,049	359,794	436,219
Effect of warrants to purchase common stock	432,809	494,558	486,113	496,464
Denominator for dilutive earnings per share - adjusted weighted average shares and assumed conversions	43,845,015	41,723,525	43,581,487	41,717,452
Basic earnings per common share from continuing operations	$0.72	$0.53	$1.33	$1.34
Basic earnings per common share	$0.72	$0.53	$1.33	$1.34
Diluted earnings per share from continuing operations	$0.71	$0.52	$1.30	$1.31
Diluted earnings per common share	$0.71	$0.52	$1.30	$1.31
Stock options exluded from computation of EPS	46,000	99,500	'	'

Securities_Details

Securities (Details) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale Securities [Abstract]	'	'
Available-for-sale Securities, Net Unrealized Gains	$2,400,000	$2,500,000
Available for Sale Securities, net unrealized gain as percent of amortized cost	5.08%	4.13%
Summary of Available-for-Sale Securities	'	'
Amortized Cost	46,943,000	60,709,000
Gross Unrealized Gains	2,544,000	2,780,000
Gross Unrealized Losses	-157,000	-275,000
Securities, available-for-sale	49,330,000	63,214,000
Residential mortgage-backed securities	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	33,491,000	38,786,000
Gross Unrealized Gains	2,511,000	2,676,000
Gross Unrealized Losses	0	0
Securities, available-for-sale	36,002,000	41,462,000
Municipals	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	5,930,000	14,401,000
Gross Unrealized Gains	22,000	104,000
Gross Unrealized Losses	0	0
Securities, available-for-sale	5,952,000	14,505,000
Equity securities	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	7,522,000	7,522,000
Gross Unrealized Gains	11,000	0
Gross Unrealized Losses	-157,000	-275,000
Securities, available-for-sale	$7,376,000	$7,247,000

Securities_Details_1

Securities (Details 1) (USD $)	3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Available-for-sale Securities, Amortized Cost Basis, Total	$46,943,000	$60,709,000
Available-for-sale Securities, Total	49,330,000	63,214,000
Available-for-sale Securities, Other Disclosure Items	'	'
Federal Tax Rate	35.00%	'
Available-for-sale Securities Pledged as Collateral	37,500,000	'
Residential mortgage-backed securities	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Amortized cost, Less Than One Year	13,000	238,000
Amortized cost, After One Through Five Years	11,711,000	14,720,000
Amortized cost, After Five Through Ten Years	6,504,000	7,718,000
Amortized cost, After Ten Years	15,263,000	16,110,000
Available-for-sale Securities, Amortized Cost Basis, Total	33,491,000	38,786,000
Estimated fair value, Less Than One Year	13,000	252,000
Estimated fair value, After One Through Five Years	12,447,000	15,641,000
Estimated fair value, After Five Through Ten Years	7,266,000	8,456,000
Estimated fair value, After Ten Years	16,276,000	17,113,000
Available-for-sale Securities, Total	36,002,000	41,462,000
Weighted average yield, Less Than One Year	6.50%	4.32%
Weighted average yield, After One Through Five Years	4.80%	4.78%
Weighted average yield, After Five Through Ten Years	5.53%	5.56%
Weighted average yield, After Ten Years	2.36%	2.40%
Weighted average yield, Total	3.83%	3.94%
Municipals	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Amortized cost, Less Than One Year	3,614,000	7,749,000
Amortized cost, After One Through Five Years	2,316,000	6,652,000
Amortized cost, After Five Through Ten Years	0	0
Amortized cost, After Ten Years	0	0
Available-for-sale Securities, Amortized Cost Basis, Total	5,930,000	14,401,000
Estimated fair value, Less Than One Year	3,627,000	7,818,000
Estimated fair value, After One Through Five Years	2,325,000	6,687,000
Estimated fair value, After Five Through Ten Years	0	0
Estimated fair value, After Ten Years	0	0
Available-for-sale Securities, Total	5,952,000	14,505,000
Weighted average yield, Less Than One Year	5.85%	5.76%
Weighted average yield, After One Through Five Years	5.75%	5.71%
Weighted average yield, After Five Through Ten Years	0.00%	0.00%
Weighted average yield, After Ten Years	0.00%	0.00%
Weighted average yield, Total	5.92%	5.73%
Equity securities	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Amortized cost, Less Than One Year	7,522,000	7,522,000
Amortized cost, After One Through Five Years	0	0
Amortized cost, After Five Through Ten Years	0	0
Amortized cost, After Ten Years	0	0
Available-for-sale Securities, Amortized Cost Basis, Total	7,522,000	7,522,000
Estimated fair value, Less Than One Year	7,376,000	7,247,000
Estimated fair value, After One Through Five Years	0	0
Estimated fair value, After Five Through Ten Years	0	0
Estimated fair value, After Ten Years	0	0
Available-for-sale Securities, Total	7,376,000	7,247,000
Deposits	'	'
Available-for-sale Securities, Other Disclosure Items	'	'
Available-for-sale Securities Pledged as Collateral	10,000,000	'
Customer repurchase agreements	'	'
Available-for-sale Securities, Other Disclosure Items	'	'
Available-for-sale Securities Pledged as Collateral	$27,500,000	'

Securities_Details_2

Securities (Details 2) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position	'	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$6,343	'	$6,343	'	$7,247
Unrealized Loss, Total	157	'	'	'	275
Comprehensive income	33,449	23,405	61,609	56,077	'
Change in unrealized gain on available-for-sale securities, net of taxes of $100 (unaudited)	28	-668	-77	-1,139	'
Equity securities	'	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position	'	'	'	'	'
Fair Value, Less Than 12 Months	0	'	0	'	7,247
Unrealized Loss, Less Than 12 Months	0	'	'	'	275
Fair Value, 12 Months or Longer	6,343	'	6,343	'	0
Unrealized Loss, 12 Months or Longer	$157	'	'	'	$0

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans and Leases Receivable, Net Reported Amount	'	'	'	'
Commercial	$5,295,368	$5,020,565	'	'
Mortgage finance	3,700,253	2,784,265	'	'
Construction	1,567,667	1,262,905	'	'
Real Estate	2,231,630	2,146,228	'	'
Consumer	15,847	15,350	'	'
Leases	95,914	93,160	'	'
Loans and Leases Receivable, Gross, Total	12,906,679	11,322,473	'	'
Deferred inocme (net of origination costs)	53,711	51,899	'	'
Allowance for loan losses	-91,114	-87,604	-79,428	-74,337
Loans held for investment, net	$12,761,854	$11,182,970	'	'

Loans_and_Allowances_for_Credi

Loans and Allowances for Credit Losses - Credit Risk Profile (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	$5,295,368	$5,020,565
Mortgage finance	3,700,253	2,784,265
Construction	1,567,667	1,262,905
Real Estate	2,231,630	2,146,228
Consumer	15,847	15,350
Leases	95,914	93,160
Total loans held for investment	12,906,679	11,322,473
Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	38,450	24,132
Mortgage finance	0	0
Construction	0	102
Real Estate	9,218	6,338
Consumer	0	0
Leases	183	51
Total loans held for investment	47,851	30,623
Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	60,320	74,593
Mortgage finance	0	0
Construction	0	103
Real Estate	11,249	21,770
Consumer	57	45
Leases	4,504	3,742
Total loans held for investment	76,130	100,253
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	5,171,053	4,908,944
Mortgage finance	3,700,253	2,784,265
Construction	1,567,667	1,261,995
Real Estate	2,195,165	2,099,450
Consumer	15,790	15,251
Leases	91,205	89,317
Total loans held for investment	12,741,133	11,159,222
Nonperforming Financing Receivable [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	25,545	12,896
Mortgage finance	0	0
Construction	0	705
Real Estate	15,998	18,670
Consumer	0	54
Leases	22	50
Total loans held for investment	$41,565	$32,375

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses (Details 1) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Reserve for loan losses:	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	$87,604	$74,337
Loans charged-off	7,923	4,650
Recoveries	3,366	1,066
Net charge-offs	4,557	3,584
Provision for loan losses	-8,067	-8,675
Loans and Leases Receivable, Allowance, Ending Balance	$91,114	$79,428

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses (Details 2) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	$87,604	$74,337
Provision for possible loan losses	8,067	8,675
Loans charged-off	7,923	4,650
Recoveries	3,366	1,066
Net charge-offs	4,557	3,584
Loans and Leases Receivable, Allowance, Ending Balance	91,114	79,428
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	7,018	3,493
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	84,096	75,935
Commercial	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	39,868	21,547
Provision for possible loan losses	13,714	13,139
Loans charged-off	7,526	4,474
Recoveries	2,239	745
Net charge-offs	5,287	3,729
Loans and Leases Receivable, Allowance, Ending Balance	48,295	30,957
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	6,293	2,934
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	42,002	28,023
Mortgage Finance	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	0	0
Provision for possible loan losses	0	0
Loans charged-off	0	0
Recoveries	0	0
Net charge-offs	0	0
Loans and Leases Receivable, Allowance, Ending Balance	0	0
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	0
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	0	0
Construction	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	14,553	12,097
Provision for possible loan losses	199	615
Loans charged-off	0	0
Recoveries	0	0
Net charge-offs	0	0
Loans and Leases Receivable, Allowance, Ending Balance	14,752	12,712
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	0
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	14,752	12,712
Real Estate	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	24,210	30,893
Provision for possible loan losses	-3,891	-2,905
Loans charged-off	296	131
Recoveries	47	15
Net charge-offs	249	116
Loans and Leases Receivable, Allowance, Ending Balance	20,070	27,872
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	722	548
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	19,348	27,324
Consumer	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	149	226
Provision for possible loan losses	114	11
Loans charged-off	101	45
Recoveries	31	45
Net charge-offs	70	0
Loans and Leases Receivable, Allowance, Ending Balance	193	237
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	1
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	193	236
Leases	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	3,105	2,460
Provision for possible loan losses	-1,930	343
Loans charged-off	0	0
Recoveries	1,049	261
Net charge-offs	-1,049	-261
Loans and Leases Receivable, Allowance, Ending Balance	2,224	3,064
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	3	10
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	2,221	3,054
Unallocated	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	5,719	7,114
Provision for possible loan losses	-139	-2,528
Loans charged-off	0	0
Recoveries	0	0
Net charge-offs	0	0
Loans and Leases Receivable, Allowance, Ending Balance	5,580	4,586
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	0
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	$5,580	$4,586

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses (Details 3) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	$47,491	$39,976	$43,215
Loans collectively evaluated for impairment	12,859,188	11,282,497	10,351,133
Commercial	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	27,679	15,139	19,475
Loans collectively evaluated for impairment	5,267,689	5,005,426	4,451,387
Mortgage Finance	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	3,700,253	2,784,265	2,838,234
Construction	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	0	705	0
Loans collectively evaluated for impairment	1,567,667	1,262,200	969,071
Real Estate	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	19,790	24,028	23,666
Loans collectively evaluated for impairment	2,211,840	2,122,200	1,991,378
Consumer	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	0	54	9
Loans collectively evaluated for impairment	15,847	15,296	24,017
Leases	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	22	50	65
Loans collectively evaluated for impairment	$95,892	$93,110	$77,046

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses (Details 4) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	$41,565	$32,375
Commercial | Business loans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	24,245	12,896
Commercial | Energy	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	1,300	0
Construction | Market risk	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	0	705
Real estate | Market risk	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	9,539	15,607
Real estate | Commercial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	4,079	508
Real estate | Secured by 1-4 family	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	2,380	2,555
Consumer	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	0	54
Leases	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	$22	$50

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses (Details 5) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	'	'	$1,614
With no related allowance recorded	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	22,655	'	19,676
Unpaid Principal Balance	24,904	'	21,505
Related Allowance	0	'	0
Average Recorded Investment	19,535	'	26,063
Interest Income Recognized	0	'	114
With no related allowance recorded | Commercial | Business loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	9,226	'	2,005
Unpaid Principal Balance	11,475	'	2,005
Related Allowance	0	'	0
Average Recorded Investment	5,412	'	4,265
Interest Income Recognized	0	'	0
With no related allowance recorded | Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	425	'	'
Unpaid Principal Balance	425	'	3,443
Related Allowance	0	'	0
Average Recorded Investment	609	'	969
Interest Income Recognized	0	'	0
With no related allowance recorded | Commercial | Other	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With no related allowance recorded | Construction | Other	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With no related allowance recorded | Construction | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	705
Unpaid Principal Balance	0	'	705
Related Allowance	0	'	0
Average Recorded Investment	235	'	3,111
Interest Income Recognized	0	'	114
With no related allowance recorded | Construction | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With no related allowance recorded | Real estate | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	8,089	'	13,524
Unpaid Principal Balance	8,089	'	13,524
Related Allowance	0	'	0
Average Recorded Investment	9,936	'	9,796
Interest Income Recognized	0	'	0
With no related allowance recorded | Real estate | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	3,595	'	508
Unpaid Principal Balance	3,595	'	508
Related Allowance	0	'	0
Average Recorded Investment	2,023	'	5,458
Interest Income Recognized	0	'	0
With no related allowance recorded | Real estate | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	1,320	'	1,320
Unpaid Principal Balance	1,320	'	1,320
Related Allowance	0	'	0
Average Recorded Investment	1,320	'	2,464
Interest Income Recognized	0	'	0
With no related allowance recorded | Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With no related allowance recorded | Leases	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With an allowance recorded	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	24,836	'	20,300
Unpaid Principal Balance	25,568	'	21,665
Related Allowance	7,018	'	3,174
Average Recorded Investment	26,798	'	24,731
Interest Income Recognized	0	'	0
With an allowance recorded | Commercial | Business loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	17,153	'	11,060
Unpaid Principal Balance	17,853	'	12,425
Related Allowance	6,162	'	1,946
Average Recorded Investment	17,163	'	14,240
Interest Income Recognized	0	'	0
With an allowance recorded | Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	875	'	460
Unpaid Principal Balance	875	'	460
Related Allowance	131	'	69
Average Recorded Investment	987	'	913
Interest Income Recognized	0	'	0
With an allowance recorded | Commercial | Other	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With an allowance recorded | Construction | Other	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With an allowance recorded | Construction | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	160
Interest Income Recognized	0	'	0
With an allowance recorded | Construction | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
With an allowance recorded | Real estate | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	4,103	'	6,289
Unpaid Principal Balance	4,103	'	6,289
Related Allowance	360	'	822
Average Recorded Investment	5,332	'	7,912
Interest Income Recognized	0	'	0
With an allowance recorded | Real estate | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	484	'	0
Unpaid Principal Balance	484	'	0
Related Allowance	73	'	0
Average Recorded Investment	918	'	477
Interest Income Recognized	0	'	0
With an allowance recorded | Real estate | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	2,199	'	2,387
Unpaid Principal Balance	2,231	'	2,387
Related Allowance	289	'	321
Average Recorded Investment	2,335	'	914
Interest Income Recognized	0	'	0
With an allowance recorded | Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	54
Unpaid Principal Balance	0	'	54
Related Allowance	0	'	8
Average Recorded Investment	22	'	43
Interest Income Recognized	0	'	0
With an allowance recorded | Leases	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	22	'	50
Unpaid Principal Balance	22	'	50
Related Allowance	3	'	8
Average Recorded Investment	41	'	72
Interest Income Recognized	0	'	0
Combined	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	47,491	'	39,976
Unpaid Principal Balance	50,472	'	43,170
Related Allowance	7,018	'	3,174
Average Recorded Investment	46,333	56,900	50,794
Interest Income Recognized	0	'	114
Combined | Commercial | Business loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	26,379	'	13,065
Unpaid Principal Balance	29,328	'	14,430
Related Allowance	6,162	'	1,946
Average Recorded Investment	22,575	'	18,505
Interest Income Recognized	0	'	0
Combined | Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	1,300	'	2,074
Unpaid Principal Balance	1,300	'	3,903
Related Allowance	131	'	69
Average Recorded Investment	1,596	'	1,882
Interest Income Recognized	0	'	0
Combined | Commercial | Other	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
Combined | Construction | Other	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	0
Interest Income Recognized	0	'	0
Combined | Construction | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	705
Unpaid Principal Balance	0	'	705
Related Allowance	0	'	0
Average Recorded Investment	235	'	3,271
Interest Income Recognized	0	'	114
Combined | Construction | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average Recorded Investment	'	'	0
Combined | Construction | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	0
Unpaid Principal Balance	0	'	0
Related Allowance	0	'	0
Average Recorded Investment	0	'	'
Interest Income Recognized	0	'	0
Combined | Real estate | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	12,192	'	19,813
Unpaid Principal Balance	12,192	'	19,813
Related Allowance	360	'	822
Average Recorded Investment	15,268	'	17,708
Interest Income Recognized	0	'	0
Combined | Real estate | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	4,079	'	508
Unpaid Principal Balance	4,079	'	508
Related Allowance	73	'	0
Average Recorded Investment	2,941	'	5,935
Interest Income Recognized	0	'	0
Combined | Real estate | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	3,519	'	3,707
Unpaid Principal Balance	3,551	'	3,707
Related Allowance	289	'	321
Average Recorded Investment	3,655	'	3,378
Interest Income Recognized	0	'	0
Combined | Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	'	54
Unpaid Principal Balance	0	'	54
Related Allowance	0	'	8
Average Recorded Investment	22	'	43
Interest Income Recognized	0	'	0
Combined | Leases	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	22	'	50
Unpaid Principal Balance	22	'	50
Related Allowance	3	'	8
Average Recorded Investment	41	'	72
Interest Income Recognized	$0	'	$0

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses (Details 6) (USD $)	Jun. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	$33,858,000
60-89 Days Past Due	4,333,000
Financing Receivable, Recorded Investment, Past Due, Total	42,984,000
Current	12,822,130,000
Total loans held for investment	12,865,114,000
Greater Than 90 Days and Accruing	4,793,000
Greater Than 90 Days and Accruing, premium finance loans	4,600,000
Commercial | Business loans	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	16,215,000
60-89 Days Past Due	4,333,000
Financing Receivable, Recorded Investment, Past Due, Total	25,341,000
Current	4,282,751,000
Total loans held for investment	4,308,092,000
Greater Than 90 Days and Accruing	4,793,000
Commercial | Energy	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	2,170,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	2,170,000
Current	959,561,000
Total loans held for investment	961,731,000
Greater Than 90 Days and Accruing	0
Mortgage Finance	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Greater Than 90 Days	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	3,700,253,000
Total loans held for investment	3,700,253,000
Construction | Market risk	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	883,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	883,000
Current	1,545,656,000
Total loans held for investment	1,546,539,000
Greater Than 90 Days and Accruing	0
Construction | Secured by 1-4 family	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	21,128,000
Total loans held for investment	21,128,000
Greater Than 90 Days and Accruing	0
Real estate | Market risk	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	8,328,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	8,328,000
Current	1,645,288,000
Total loans held for investment	1,653,616,000
Greater Than 90 Days and Accruing	0
Real estate | Commercial	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	6,001,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	6,001,000
Current	464,534,000
Total loans held for investment	470,535,000
Greater Than 90 Days and Accruing	0
Real estate | Secured by 1-4 family	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	261,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	261,000
Current	91,220,000
Total loans held for investment	91,481,000
Greater Than 90 Days and Accruing	0
Consumer	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	15,847,000
Total loans held for investment	15,847,000
Greater Than 90 Days and Accruing	0
Leases	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	95,892,000
Total loans held for investment	95,892,000
Greater Than 90 Days and Accruing	$0

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses (Details 7) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	1	1	'
Pre-Restructuring Outstanding Recorded Investment	'	$1,441,000	$1,945,000	'
Post-Restructuring Outstanding Recorded Investment	'	1,430,000	1,898,000	'
Loans considered restructured that are not already on nonaccrual	249,000	249,000	'	1,900,000
Nonaccrual loans that met the criteria for restructured	'	'	'	17,800,000
Financing Receivable Modifications Non Accrual Loans Met Criteria For Restrucutred Unfunded Commitments	16,200,000	'	'	'
Commercial	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	'	1	'
Pre-Restructuring Outstanding Recorded Investment	'	'	1,945,000	'
Post-Restructuring Outstanding Recorded Investment	'	'	1,898,000	'
Real estate	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	1	'	'
Pre-Restructuring Outstanding Recorded Investment	'	1,441,000	'	'
Post-Restructuring Outstanding Recorded Investment	'	$1,430,000	'	'

Recovered_Sheet1

Loans and Allowance for Credit Losses - TDR Summary (Details 8) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	$1,430	$1,898
Extended maturity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	1,430	0
Adjusted interest rates [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	0	0
Combination of rate and maturity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	0	1,898
Other [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	$0	$0

OREO_and_Valuation_Allowance_f2

OREO and Valuation Allowance for Losses on OREO (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Real Estate Owned, Disclosure of Detailed Components [Abstract]	'	'	'	'
Beginning balance	$2,420	$14,426	$5,110	$15,991
Additions	0	912	851	912
Sales	1,735	1,902	5,276	3,396
Valuation allowance for OREO	0	164	0	164
Real Estate Acquired Through Foreclosure Direct Write Offs	0	-219	0	-290
Ending balance	$685	$13,053	$685	$13,053

Financial_Instruments_with_Off2

Financial Instruments with Off-Balance Sheet Risk (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments to extend credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$4,497,052	$3,674,391
Standby letters of credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$173,531	$145,662

Regulatory_Restrictions_Detail

Regulatory Restrictions (Details)	Jun. 30, 2014	Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total capital (to risk weighted assets), actual ratio	11.67%	10.73%
Tier 1 capital (to risk-weighted assets), actual ratio	9.09%	9.15%
Tier 1 capital (to average assets), actual ratio	10.94%	10.87%

Regulatory_Restrictions_Detail1

Regulatory Restrictions (Details 1) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Loans and Leases Receivable, Net of Deferred Income	$9,152,715	$8,486,309

Employee_Benefits_Details_3

Employee Benefits (Details 3) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Restricted stock units, additional disclosures	'	'	'	'
Compensation expense	$1,266	$938	$2,528	$1,843
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	12,252	'	12,252	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'3 years 6 months	'	'	'
Excess tax benefits from stock-based compensation arrangements	'	'	4,227	-1,882
RSUs	'	'	'	'
Restricted stock units, additional disclosures	'	'	'	'
Compensation expense	1,118	804	2,237	1,561
Cash-based compensation expense	1,312	8,368	4,705	9,407
SARs	'	'	'	'
Restricted stock units, additional disclosures	'	'	'	'
Compensation expense	$148	$134	$291	$282

Fair_Value_Disclosures_Details

Fair Value Disclosures (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	$49,330	'	$63,214	'	'	'
OREO	685	2,420	5,110	13,053	14,426	15,991
Mortgage-backed securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	36,002	'	41,462	'	'	'
Municipals	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	5,952	'	14,505	'	'	'
Equity securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	7,376	'	7,247	'	'	'
Fair value measuremenets, recurring basis | Level 1	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Derivative assets	0	'	0	'	'	'
Derivative liabilitiy	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 1 | Mortgage-backed securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 1 | Corporate securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 1 | Municipals	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 1 | Equity securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 2	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Derivative assets	24,453	'	9,317	'	'	'
Derivative liabilitiy	24,453	'	9,317	'	'	'
Fair value measuremenets, recurring basis | Level 2 | Mortgage-backed securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	36,002	'	41,462	'	'	'
Fair value measuremenets, recurring basis | Level 2 | Corporate securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 2 | Municipals	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	5,952	'	14,505	'	'	'
Fair value measuremenets, recurring basis | Level 2 | Equity securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	7,376	'	7,247	'	'	'
Fair value measuremenets, recurring basis | Level 3	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Derivative assets	0	'	0	'	'	'
Derivative liabilitiy	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 3 | Mortgage-backed securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 3 | Corporate securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 3 | Municipals	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, recurring basis | Level 3 | Equity securities	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities	0	'	0	'	'	'
Fair value measuremenets, nonrecurring basis | Level 1	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Loans	0	'	0	'	'	'
OREO	0	'	0	'	'	'
Fair value measuremenets, nonrecurring basis | Level 2	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Loans	0	'	0	'	'	'
OREO	0	'	0	'	'	'
Fair value measuremenets, nonrecurring basis | Level 3	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Loans	24,068	'	13,474	'	'	'
OREO	$685	'	$5,110	'	'	'

Fair_Value_Disclosures_Details1

Fair Value Disclosures (Details 2) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	$49,330	$63,214
Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	357,142	153,911
Available-for-sale Securities	49,330	63,214
Loans held for sale from discontinued operations	290	294
Loans held for investment, net	12,761,854	11,182,970
Derivative assets	24,453	9,317
Deposits	10,757,316	9,257,379
Federal funds purchased	273,041	148,650
Repurchase agreements	27,491	21,954
Borrowings	700,016	855,026
Subordinated notes	286,000	111,000
Trust preferred subordinated debentures	113,406	113,406
Derivative liabilities	24,453	9,317
Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	357,142	153,911
Available-for-sale Securities	49,330	63,214
Loans held for sale from discontinued operations	290	294
Loans held for investment, net	12,766,383	11,179,145
Derivative assets	24,453	9,317
Deposits	10,757,495	9,257,574
Federal funds purchased	273,041	148,650
Repurchase agreements	27,491	21,954
Borrowings	700,016	855,026
Subordinated notes	286,066	96,647
Trust preferred subordinated debentures	113,406	113,406
Derivative liabilities	$24,453	$9,317

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Details) (USD $)	3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]	'	'
Description of credit risk exposure	'Our credit exposure on interest rate swaps and caps is limited to the net favorable value and interest payments of all swaps and caps by each counterparty. In such cases collateral may be required from the counterparties involved if the net value of the swaps and caps exceeds a nominal amount considered to be immaterial.	'
Credit exposure on risk derivatives	$24,500,000	$9,300,000
Cash Pledged As Derivative Collateral	23,500,000	10,700,000
Interest rate swaps | Non-hedging | Commercial loan/lease	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value, Derivative Assets	23,422,000	8,652,000
Estimated Fair Value, Derivative Liabilities	-23,422,000	-8,652,000
Notional Amount, Derivative Assets	835,562,000	764,939,000
Notional Amount, Derivative Liabilities	-835,562,000	-764,939,000
Interest rate swaps | Non-hedging | Commercial loan/lease | Interest Rate Received	'	'
Derivatives, Fair Value [Line Items]	'	'
Weighted-average receive and pay interest rate	4.84%	2.99%
Interest rate swaps | Non-hedging | Commercial loan/lease | Interest Rate Paid	'	'
Derivatives, Fair Value [Line Items]	'	'
Weighted-average receive and pay interest rate	2.85%	4.89%
Interest Rate Cap [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount, Derivative Assets	'	-58,706,000
Weighted-average receive and pay interest rate	1.51%	1.87%
Interest Rate Cap [Member] | Non-hedging | Commercial loan/lease	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value, Derivative Assets	-1,031,000	-665,000
Estimated Fair Value, Derivative Liabilities	1,031,000	665,000
Notional Amount, Derivative Assets	-54,428,000	'
Notional Amount, Derivative Liabilities	$54,428,000	$58,706,000

Stockholders_Equity_Details

Stockholder's Equity (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Equity Distribution Agreement [Line Items]	'	'
Sale of common stock	$106,548	$0
Issuance of preferred stock - Value	$0	$144,987