Texas Capital Bancshares (TCBI) 10-K 21 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 19, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-K	'
Document Period End Date	31-Dec-13	'
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	'	42,755,496
Entity Public Float	'	$2,517,443,605
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'FY	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Cash and due from banks	$92,484	$111,938
Interest-bearing Deposits in Banks	61,337	94,410
Federal funds sold	90	0
Securities, available-for-sale	63,214	100,195
Loans held for sale from discontinued operations	294	302
Mortgage Finance	2,784,265	3,175,272
Loans held for investment (net of unearned income)	8,486,309	6,785,535
Less: Allowance for loan losses	87,604	74,337
Loans held for investment, net	11,182,970	9,886,470
Premises and equipment, net	11,482	11,445
Accrued interest receivable and other assets	281,534	316,201
Goodwill and intangible assets, net	21,286	19,883
Total assets	11,714,691	10,540,844
Deposits:	'	'
Non-interest bearing	3,347,567	2,535,375
Interest bearing	5,579,505	4,576,120
Interest bearing in foreign branches	330,307	329,309
Total deposits	9,257,379	7,440,804
Accrued interest payable	749	650
Other liabilities	110,177	91,581
Federal funds purchased	148,650	273,179
Repurchase agreements	21,954	23,936
Other Borrowings	855,026	1,650,046
Subordinated notes	111,000	111,000
Trust preferred subordinated debentures	113,406	113,406
Total liabilities	10,618,341	9,704,602
Stockholders' equity:	'	'
Preferred stock, $.01 par value, $1,000 liquidation value: Authorized shares - 10,000,000; Issued shares - none	150,000	'
Common stock, $.01 par value: Authorized shares - 100,000,000; Issued shares - 41,036,787 and 40,727,996 at December 31 2013 and 2002, respectively	410	407
Additional paid-in capital	448,208	450,116
Retained earnings	496,112	382,455
Treasury stock (shares at cost: 417 at December 31, 2013 and 2012, respectively)	-8	-8
Accumulated other comprehensive income, net of taxes	1,628	3,272
Total stockholders' equity	1,096,350	836,242
Total liabilities and stockholders' equity	$11,714,691	$10,540,844

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS	'	'
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	0
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	41,036,787	40,727,996
Treasury Stock Shares	417	417

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest income	'	'	'
Interest and fees on loans	$441,314	$393,548	$314,753
Securities	3,015	4,688	6,458
Federal funds sold	65	13	37
Deposits in other banks	231	208	352
Total interest income	444,625	398,457	321,600
Interest expense	'	'	'
Deposits	14,030	13,644	14,950
Federal funds purchased	686	979	602
Repurchase agreements	18	13	10
Other borrowings	515	2,149	528
Subordinated notes	7,327	2,037	0
Trust preferred submordinated debentures	2,536	2,756	2,573
Total interest expense	25,112	21,578	18,663
Net interest income	419,513	376,879	302,937
Provision for credit losses	19,000	11,500	28,500
Net interest income after provision for credit losses	400,513	365,379	274,437
Non-interest income	'	'	'
Service charges on deposit accounts	6,783	6,605	6,480
Trust fee income	5,023	4,822	4,219
Bank Owned Life Insurance (BOLI) Income	1,917	2,168	2,095
Brokered loan fees	16,980	17,596	11,335
Swap fees	5,520	4,909	1,935
Other	7,801	6,940	6,168
Total non-interest income	44,024	43,040	32,232
Non-interest expense	'	'	'
Salaries and employee benefits	157,752	121,456	100,535
Net occupancy expense	16,821	14,852	13,657
Marketing	16,203	13,449	11,109
Legal and professional	18,104	17,557	14,996
Communications and technology	13,762	11,158	9,608
FDIC insurance assessment	8,057	5,568	7,543
Allowance and other carrying costs for OREO	1,788	9,075	9,586
Litigation settlement expense	-908	4,000	0
Other	25,155	22,729	21,167
Total non-interest expense	256,734	219,844	188,201
Income (loss) from continuing operations before income taxes	187,803	188,575	118,468
Income tax expense	66,757	67,866	42,366
Income from continuing operations	121,046	120,709	76,102
Loss from discontinued operations (after-tax)	5	-37	-126
Net income	121,051	120,672	75,976
Preferred stock dividends	-7,394	0	0
Net income available to common shareholders	113,657	120,672	75,976
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, [Abstract]	'	'	'
Unrealized gain/loss on available-for-sale securities arising during period	-2,529	-2,231	-974
Income tax expense/benefit related to unrealized gain on avaiable-for-sale securities	-885	-781	-341
Other comprehensive income, net of tax	-1,644	-1,450	-633
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Abstract	'	'	'
Total comprehensive income (unaudited)	$119,407	$119,222	$75,343
Basic earnings per common share	'	'	'
Income from continuing operations	$2.78	$3.09	$2.04
Net income	$2.78	$3.09	$2.03
Diluted earnings per common share	'	'	'
Income from continuing operations	$2.72	$3.01	$1.99
Net income	$2.72	$3	$1.98

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
Beginning balance - Value at Dec. 31, 2010	$528,319	'	$369	$336,796	$185,807	($8)	$5,355
Beginning balance - Shares at Dec. 31, 2010	'	'	36,957,104	'	'	-417	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	75,976	'	'	'	75,976	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $341,$781,$885 in year 2011, 2012 and 2013 respectively (unaudited)	-633	'	'	'	'	'	-633
Total comprehensive income (unaudited)	75,343	'	'	'	'	'	'
Tax expense related to exercise of stock options	3,139	'	'	3,139	'	'	'
Stock-based compensation expense recognized in earnings	7,340	'	'	7,340	'	'	'
Issuance of stock related to stock-based awards - Shares	'	'	709,604	'	'	'	'
Issuance of stock related to stock-based awards - Value	2,190	'	7	2,183	'	'	'
Proceeds from issuance of preferred stock and related warrants	0	'	'	'	'	'	'
Preferred stock dividends	0	'	'	'	'	'	'
Ending balance (unaudited) - Value at Dec. 31, 2011	616,331	'	376	349,458	261,783	-8	4,722
Ending balance (unaudited) - Shares at Dec. 31, 2011	'	'	37,666,708	'	'	'	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	120,672	'	'	'	120,672	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $341,$781,$885 in year 2011, 2012 and 2013 respectively (unaudited)	-1,450	'	'	'	'	'	-1,450
Total comprehensive income (unaudited)	119,222	'	'	'	'	'	'
Tax expense related to exercise of stock options	7,769	'	'	7,769	'	'	'
Stock-based compensation expense recognized in earnings	5,578	'	'	5,578	'	'	'
Issuance of stock related to stock-based awards - Shares	'	'	761,288	'	'	'	'
Issuance of stock related to stock-based awards - Value	355	'	8	347	'	'	'
Issuance of stock - Value	86,987	'	23	86,964	'	'	'
Issuance of stock - Shares	'	'	2,300,000	'	'	'	'
Issuance of preferred stock	0	'	'	'	'	'	'
Proceeds from issuance of preferred stock and related warrants	0	'	'	'	'	'	'
Preferred stock dividends	0	'	'	'	'	'	'
Ending balance (unaudited) - Value at Dec. 31, 2012	836,242	'	407	450,116	382,455	-8	3,272
Ending balance (unaudited) - Shares at Dec. 31, 2012	'	'	40,727,996	'	'	-417	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	121,051	'	'	'	121,051	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $341,$781,$885 in year 2011, 2012 and 2013 respectively (unaudited)	-1,644	'	'	'	'	'	-1,644
Total comprehensive income (unaudited)	119,407	'	'	'	'	'	'
Tax expense related to exercise of stock options	1,200	'	'	1,200	'	'	'
Stock-based compensation expense recognized in earnings	4,118	'	'	4,118	'	'	'
Issuance of stock related to stock-based awards - Shares	'	'	272,452	'	'	'	'
Issuance of stock related to stock-based awards - Value	-2,250	'	3	-2,253	'	'	'
Issuance of preferred stock	6,000,000	6,000,000	'	'	'	'	'
Proceeds from issuance of preferred stock and related warrants	144,987	150,000	'	-5,013	'	'	'
Preferred stock dividends	-7,394	'	'	'	7,394	'	'
Issuance of stock related to warrants (shares)	'	'	36,339	'	'	'	'
Issuance of stock related to warrants	40	'	0	40	'	'	'
Ending balance (unaudited) - Value at Dec. 31, 2013	$1,096,350	$150,000	$410	$448,208	$496,112	($8)	$1,628
Ending balance (unaudited) - Shares at Dec. 31, 2013	'	6,000,000	41,036,787	'	'	-417	'

CONSOLIDATED_STATEMENTS_OF_STO1

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parentheticals) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY	'	'	'
Available-for-sale Securities, Income Tax Expense on Change in Unrealized Holding Gain (Loss)	($885)	($781)	($341)

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities	'	'	'
Net income from continuing operations	$121,046	$120,709	$76,102
Adjustments to reconcile net income to net cash (used in) operating activities	'	'	'
Provision for credit losses	19,000	11,500	28,500
Deferred Income Tax Expense (Benefit)	-11,599	-3,131	-6,682
Depreciation and amortization	11,480	9,437	9,103
Amortiziation and accretion on securities	22	38	78
Bank Owned Life Insurance (BOLI) Income	-1,917	-2,168	-2,095
Stock-based compensation expense	20,953	12,018	7,340
Tax benefit from stock option exercises	1,200	7,769	3,139
Excess tax benefits from stock-based compensation arrangements	-3,427	-22,197	-8,970
Loss on sale of assets	-931	-917	-80
Changes in operating assets and liabilities:	'	'	'
Accrued interest receivable and other assets	31,002	-61,334	-63,247
Accrued interest payable and other liabilities	2,308	3,066	32,694
Net cash used in operating activities of continuing operations	189,137	74,790	75,882
Net cash (used in) operating activities of discontinued operations	13	54	-29
Net cash used in operating activities	189,150	74,844	75,853
Net cash used in investing activities of continuing operations	'	'	'
Payments to Acquire Available-for-sale Securities	-2	-13	-10,000
Maturities and calls of available-for-sale securities	15,890	14,260	8,240
Principal payments received on available-for-sale securities	18,542	27,000	42,421
Originations of mortgage finance loans	-51,087,328	-51,110,692	-27,234,509
Proceeds from pay-offs of mortgage finance loans	51,478,335	50,015,503	26,348,634
Net (increase) decrease in loans held for investment	-1,706,505	-1,220,626	-890,753
Purchase of premises and equipment, net	-4,029	-3,538	-3,286
Proceeds from sale of foreclosed assets	11,667	14,921	23,329
Cash paid for acquisition	-2,445	0	-11,482
Net cash provided by investing activities of continuing operations	-1,275,875	-2,263,185	-1,727,406
Net cash provided by financing activities of continuing operations	'	'	'
Net increase (decrease) in deposits	1,816,575	1,884,547	100,856
Proceeds from issuance of stock related to stock-based awards	-2,210	355	2,190
Proceeds from issuance of common stock	0	86,987	0
Net proceeds from issuance of preferred stock	144,987	0	0
Net increase (decrease) in other borrowings	-797,002	318,115	1,341,761
Excess tax benefits from stock-based compensation arrangements	3,427	22,197	8,970
Net (decrease) in federal funds purchased	-124,529	-139,070	128,468
Proceeds from issuance of subordinated notes	0	111,000	0
Net cash (used in) financing activities of continuing operations	1,034,288	2,284,131	1,582,245
Net increase (decrease) in cash and cash equivalents	-52,437	95,790	-69,308
Cash and cash equivalents at beginning of period	206,348	110,558	179,866
Cash and cash equivalents at end of period	153,911	206,348	110,558
Supplemental disclosures of cash flow information:	'	'	'
Cash paid during the period for interest	24,962	21,527	20,643
Cash paid during the period for income taxes	77,635	69,095	32,127
Non-cash transactions:	'	'	'
Transfers from loans/leases to OREO and other repossessed assets	$1,331	$3,489	$24,327

Operations_and_Summary_of_Sign

Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Operations and Summary of Significant Accounting Policies [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 doing business in March 1998, but did not commence banking operations until 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, N.A. (“the Bank”). The Bank currently provides commercial banking services to its customers largely in Texas and concentrates on middle market commercial businesses and successful professionals and entrepreneurs.
	Basis of Presentation
	The accounting and reporting policies of Texas Capital Bancshares, Inc. conform to accounting principles generally accepted in the United States and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“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 possible 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 2012 and 2011 were adjusted to increase net cash flows from operating activities by $1.1 billion and $885.9 million, respectively, with corresponding decreases 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 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 December 31, 2013 and 2012.
	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 (loss), net. Accumulated comprehensive income (loss), net for the three years ended December 31, 2013 is reported in the accompanying consolidated statements of changes in stockholders' equity.
	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. Diluted earnings per common share include the dilutive effect of stock options and non-vested stock awards granted 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 14 – Earnings Per 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.

Securities

Securities	12 Months Ended
	Dec. 31, 2013
Securities	'
Securities	'
	(2)       Securities
	The following is a summary of securities (in thousands):
					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
					31-Dec-12
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	57,342	$	4,239	$	-	$	61,581
		Corporate securities			5,000		80		-		5,080
		Municipals			25,300		594		-		25,894
		Equity securities(1)			7,519		121		-		7,640
				$	95,161	$	5,034	$	-	$	100,195
	(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):
					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%		0.00%		-		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
					31-Dec-12
							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	$	656	$	5,698	$	23,111	$	27,877	$	57,342
			Estimated fair value		690		6,113		24,948		29,830		61,581
			Weighted average yield(3)		4.20%		5.29%		4.86%		3.41%		4.19%
		Corporate securities:
			Amortized cost		-		5,000		-		-		5,000
			Estimated fair value		-		5,080		-		-		5,080
			Weighted average yield(3)		-		7.38%		-		-		7.38%
		Municipals:(2)
			Amortized cost		6,575		16,448		2,277		-		25,300
			Estimated fair value		6,646		16,895		2,353		-		25,894
			Weighted average yield(3)		5.75%		5.66%		6.01%		-		5.72%
		Equity securities:(4)
			Amortized cost		7,519		-		-		-		7,519
		Estimated fair value		7,640		-		-		-		7,640
	Total available-for-sale securities:
		Amortized cost									$	95,161
		Estimated fair value									$	100,195
		Less Than 12 Months				12 Months or Longer				Total
		Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
		Value		Loss		Value		Loss		Value		Loss
Equity securities	$	7,247	$	-275	$	-	$	-	$	7,247	$	-275
At December 31, 2013, there was one investment position in an unrealized loss position. This security is a publicly traded equity fund and is subject to market pricing volatility. We do not believe that these unrealized losses are “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.
At December 31, 2012, we did not have any investment securities in an unrealized loss position.
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. We had comprehensive income of $119.4 million for the year ended December 31, 2013 and comprehensive income of $119.2 million for the year ended December 31, 2012. Comprehensive income during the years ended December 31, 2013 and 2012 included a net after-tax loss of $1.6 million and $1.5 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	12 Months Ended
	Dec. 31, 2013
Loans and Allowance for Credit Losses [Abstract]	'
Loans and Allowance for Credit Losses	'
	(3)       Loans
	Loans held for investment are summarized by category as follows (in thousands):
		31-Dec
		2013		2012
	Commercial	$	5,020,565	$	4,106,419
	Mortgage finance		2,784,265		3,175,272
	Construction		1,262,905		737,637
	Real estate		2,146,228		1,892,451
	Consumer		15,350		19,493
	Equipment leases		93,160		69,470
	Gross loans held for investment		11,322,473		10,000,742
	Deferred income (net of direct origination costs)		-51,899		-39,935
	Allowance for loan losses		-87,604		-74,337
	Total	$	11,182,970	$	9,886,470
	Commercial Loans and Leases. Our commercial loan 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 transaction 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 loans 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.
	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 investment in the borrowers' equity. 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 and commitment fees.
	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 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.
	As of December 31, 2013, 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 adequacy of the allowance for loan losses. Management believes the allowance for loan losses is appropriate to cover estimated losses on loans at each balance sheet date.
	At December 31, 2013, we had a blanket floating lien based on certain real estate loans used as collateral for FHLB borrowings.
	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 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 inappropriately protected by 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 nonaccrual 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 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 considers 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. Currently, the review of reserve adequacy is performed by executive management and presented to our board of directors for their review, consideration and ratification on a quarterly basis.
	The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and nonaccrual status as of December 31, 2013 and 2012 (in thousands):
	31-Dec-13				Mortgage
			Commercial		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
	31-Dec-12				Mortgage
			Commercial		Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	4,013,538	$	3,175,272	$	703,673	$	1,816,027	$	19,436	$	68,327	$	9,796,273
		Special mention		33,137		-		11,957		12,461		-		919		58,474
		Substandard-accruing		44,371		-		4,790		40,897		-		104		90,162
		Non-accrual		15,373		-		17,217		23,066		57		120		55,833
	Total loans held for investment		$	4,106,419	$	3,175,272	$	737,637	$	1,892,451	$	19,493	$	69,470	$	10,000,742
	The following table details activity in the reserve for loan losses by portfolio segment for the years ended December 31, 2013 and 2012. Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories.
	31-Dec-13					Mortgage
	(in thousands)			Commercial		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				23,693		-		2,456		-6,809		-105		325		-1,395		18,165
	Charge-offs				6,575		-		-		144		45		2		-		6,766
	Recoveries				1,203		-		-		270		73		322		-		1,868
	Net charge-offs (recoveries)				5,372		-		-		-126		-28		-320		-		4,898
	Ending balance			$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	Period end amount allocated to:
		Loans individually evaluated
			for impairment	$	2,015	$	-	$	-	$	1,143	$	8	$	8	$	-	$	3,174
		Loans collectively evaluated
			for impairment		37,853		-		14,553		23,067		141		3,097		5,719		84,430
	Ending balance			$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	31-Dec-12					Mortgage
	(in thousands)			Commercial		Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance			$	17,337	$	-	$	7,845	$	33,721	$	223	$	2,356	$	8,813	$	70,295
	Provision for loan losses				10,086		-		4,242		-2,741		19		200		-1,699		10,107
	Charge-offs				6,708		-		-		899		49		204		-		7,860
	Recoveries				832		-		10		812		33		108		-		1,795
	Net charge-offs (recoveries)				5,876		-		-10		87		16		96		-		6,065
Ending balance			$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
Period end amount allocated to:
	Loans individually evaluated
		for impairment	$	2,983	$	-	$	14	$	899	$	16	$	18	$	-	$	3,930
	Loans collectively evaluated
		for impairment		18,564		-		12,083		29,994		210		2,442		7,114		70,407
Ending balance			$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
Our recorded investment in loans as of December 31, 2013 and 2012 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):
					Mortgage
31-Dec-13			Commercial		Finance		Construction		Real Estate		Consumer		Lease		Total
Loans individually evaluated
	for impairment	$	15,140	$	-	$	705	$	24,027	$	54	$	50	$	39,976
Loans collectively evaluated
	for impairment		5,005,425		2,784,265		1,262,200		2,122,201		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
					Mortgage
31-Dec-12			Commercial		Finance		Construction		Real Estate		Consumer		Lease		Total
Loans individually evaluated
	for impairment	$	15,373	$	-	$	18,179	$	32,512	$	57	$	120	$	66,241
Loans collectively evaluated
	for impairment		4,091,046		3,175,272		719,458		1,859,939		19,436		69,350		9,934,501
Total		$	4,106,419	$	3,175,272	$	737,637	$	1,892,451	$	19,493	$	69,470	$	10,000,742
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 decreased since December 31, 2012. We believe the level of unallocated reserves at December 31, 2013 is warranted due to the continued uncertain economic environment which has produced more frequent losses, including those resulting from fraud by borrowers. 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. We recognized $2.4 million in interest income on non-accrual loans during 2013 compared to $2.6 million in 2012 and $2.2 million in 2011. Additional interest income that would have been recorded if the loans had been current during the years ended December 31, 2013, 2012 and 2011 totaled $2.5 million, $2.4 million and $5.9 million, respectively. As of December 31, 2013, none 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 December 31, 2013 (in thousands):
Commercial
	Business loans	$	12,896
Construction
	Market risk		705
Real estate
	Market risk		15,607
	Commercial		508
	Secured by 1-4 family		2,555
Consumer			54
Leases			50
Total non-accrual loans		$	32,375
As of December 31, 2013, non-accrual loans included in the table above included $17.8 million related to loans that met the criteria for restructured.
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 FASB ASC 310 Receivables, we have included accruing restructured loans in our impaired loan totals. The following tables detail our impaired loans, by portfolio class as of December 31, 2013 and 2012 (in thousands)
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 loans		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		-		-		-		-		-
Equipment 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 loans		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		-
Equipment 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 loans		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		-
Equipment leases		50		50		8		72		-
Total impaired loans	$	39,976	$	43,170	$	3,174	$	50,794	$	114
31-Dec-12
		Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	2,938	$	2,938	$	-	$	1,409	$	-
Construction
Market risk		17,217		17,217		-		18,571		677
Real estate
Market risk		9,061		9,061		-		7,944		-
Commercial		6,604		6,604		-		6,451		-
Secured by 1-4 family		2,632		2,632		-		1,827		-
Consumer		-		-		-		-		-
Equipment leases		-		-		-		-		-
Total impaired loans with no allowance recorded	$	38,452	$	38,452	$	-	$	36,202	$	677
With an allowance recorded:
Commercial
Business loans	$	12,435	$	18,391	$	2,983	$	15,484	$	-
Construction
Market risk		962		962		14		321		-
Real estate
Market risk		11,439		11,439		535		11,811		-
Commercial		2,013		2,013		89		671		-
Secured by 1-4 family		763		763		275		1,632		-
Consumer		57		57		16		59		-
Equipment leases		120		120		18		182		-
Total impaired loans with an allowance recorded	$	27,789	$	33,745	$	3,930	$	30,160	$	-
Combined:
Commercial
Business loans	$	15,373	$	21,329	$	2,983	$	16,893	$	-
Construction
Market risk		18,179		18,179		14		18,892		677
Real estate
Market risk		20,500		20,500		535		19,755		-
Commercial		8,617		8,617		89		7,122		-
Secured by 1-4 family		3,395		3,395		275		3,459		-
Consumer		57		57		16		59		-
Equipment leases		120		120		18		182		-
Total impaired loans	$	66,241	$	72,197	$	3,930	$	66,362	$	677
Average impaired loans outstanding during the years ended December 31, 2013, 2012 and 2011 totaled $40.0 million, $66.4 million and $71.0 million respectively.
The table below provides an age analysis of our past due loans that are still accruing as of December 31, 2013 (in thousands):
		30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total(1)
Commercial
	Business loans	$	29,946	$	7,683	$	7,528	$	45,157	$	4,027,409	$	4,072,566
	Energy		5,239		1,092		-		6,331		928,772		935,103
Mortgage finance loans			-		-		-		-		2,784,265		2,784,265
Construction
	Market risk		1		-		103		104		1,245,388		1,245,492
	Secured by 1-4 family		-		-		-		-		16,708		16,708
Real estate
	Market risk		6,013		3,100		-		9,113		1,623,706		1,632,819
	Commercial		15,024		-		-		15,024		387,856		402,880
	Secured by 1-4 family		2,607		266		1,694		4,567		87,292		91,859
Consumer			37		177		-		214		15,082		15,296
Equipment leases			189		-		-		189		92,921		93,110
Total loans held for investment		$	59,056	$	12,318	$	9,325	$	80,699	$	11,209,399	$	11,290,098
(1)       Loans past due 90 days and still accruing includes premium finance loans of $3.8 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 either forgiveness of either principal or accrued interest. As of December 31, 2013, we have $1.9 million in loans considered restructured that are not on nonaccrual. These loans do not have unfunded commitments at December 31, 2013. Of the nonaccrual loans at December 31, 2013, $17.8 million met the criteria for restructured. 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, as of December 31, 2013 and 2012, loans that have been restructured during 2013 and 2012 (in thousands):
31-Dec-13
	Number of Contracts			Pre-Restructuring Outstanding Recorded Investment			Post-Restructuring Outstanding Recorded Investment
Commercial business loans		3		$	10,823		$	8,921
Real estate market risk		1			892			874
Total new restructured loans in 2012		4		$	11,715		$	9,795
31-Dec-12
	Number of Contracts			Pre-Restructuring Outstanding Recorded Investment			Post-Restructuring Outstanding Recorded Investment
Commercial business loans		3		$	7,140		$	7,103
Real estate market risk		2			1,726			1,147
Real estate - 1-4 family		1			1,424			1,393
Total new restructured loans in 2012		6		$	10,290		$	9,643
The restructured loans generally include terms to temporarily place loan on interest only, extend the payment terms or reduce the interest rate. We have not forgiven any principal on the above loans. The $1.9 million decrease in the post-restructuring recorded investment compared to the pre-restructuring recorded investment is due to $1.4 million in charge-offs and $554,000 in paydowns. At December 31, 2013, $8.1 million of the above loans restructured in 2013 are on non-accrual. The restructuring of the loans did not have a significant impact on our allowance for loan losses at December 31, 2013 or 2012.
The following table provides information on how loans were modified as a restructured loan during the year ended December 31, 2013 and 2012 (in thousands):
	December 31,
	2013		2012
Extended maturity	$	874	$	1,913
Adjusted payment schedule		-		1,393
Combination of maturity extension and payment schedule adjustment		8,921		6,337
Total	$	9,795	$	9,643
As of December 31, 2013, none of the loans that were restructured within the last 12 months have subsequently defaulted

OREO_and_Valuation_Allowance_f

OREO and Valuation Allowance for Losses on OREO	12 Months Ended
	Dec. 31, 2013
OREO and Valuation Allowance for Losses on OREO [Abstract]	'
OREO and Valuation Allowance for Losses on OREO	'
	(4)       OREO and Valuation Allowance for Losses on OREO
	The table below presents a summary of the activity related to OREO (in thousands):
		Year ended December 31
		2013		2012		2011
	Beginning balance	$	15,991	$	34,077	$	42,261
	Additions		1,331		3,434		22,180
	Sales		-11,292		-14,637		-23,566
	Valuation allowance for OREO		958		-4,488		-3,922
	Direct write-downs		-1,878		-2,395		-2,876
	Ending balance	$	5,110	$	15,991	$	34,077

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2013
Goodwill and Other Intangible Assets [Abstract]	'
Goodwill and Other Intangible Assets	'
	(5)       Goodwill and Other Intangible Assets
	In May 2013, we acquired the assets of a premium finance company and recorded a total intangible asset of $2.1 million. Of this total, $954,000 was allocated to goodwill, $554,000 to customer relationships, $457,000 to developed technology and $98,000 to trade name. The $554,00 customer relationship intangible will be amortized over 14 years, the $457,000 technology intangible will be amortized over 7 years, and the $98,000 intangible related to the trade name was determined to have an indefinite life.
	In June 2011, we acquired the assets of a premium finance company and recorded a total intangible asset of $11.5 million. Of this total, $7.2 million was allocated to goodwill, $4.1 million to customer relationships and $181,000 to trade name. The $4.1 million customer relationship intangible will be amortized over 18 years and the $181,000 intangible related to the trade name will be amortized over 5 years.
	Goodwill and other intangible assets at December 31, 2013 and 2012 are summarized as follows (in thousands):
		Gross Goodwill and Intangible Assets		Accumulated Amortization		Net Goodwill and Intangible Assets
	31-Dec-13
	Goodwill	$	15,370	$	-374	$	14,996
	Intangible assets - customer relationships and trademarks		9,104		-2,814		6,290
	Total goodwill and intangible assets	$	24,474	$	-3,188	$	21,286
	31-Dec-12
	Goodwill	$	14,416	$	-374	$	14,042
	Intangible assets - customer relationships and trademarks		7,996		-2,155		5,841
	Total goodwill and intangible assets	$	22,412	$	-2,529	$	19,883
	Amortization expense related to intangible assets totaled $660,000 in 2013, $597,000 in 2012 and $485,000 in 2011. The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2013 is as follows (in thousands):
	2014	$	699
	2015		598
	2016		501
	2017		473
	2018		473
	Thereafter		3,546
		$	6,290

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2013
Premises and Equipment [Abstract]	'
Premises and Equipment	'
	(6)       Premises and Equipment
	Premises and equipment at December 31, 2013 and 2012 are summarized as follows (in thousands):
		31-Dec
		2013		2012
	Premises	$	14,113	$	12,950
	Furniture and equipment		28,865		26,478
			42,978		39,428
	Accumulated depreciation		-31,496		-27,983
	Total premises and equipment, net	$	11,482	$	11,445
	Depreciation expense for the above premises and equipment was approximately $3,992,000, $3,550,000 and $3,397,000 in 2013, 2012 and 2011, respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Deposits	'
	(7)       Deposits
	Deposits at December 31, 2013 and 2012 are as follows (in thousands):
					2013		2012
	Non-interest bearing demand deposits			$	3,347,567	$	2,535,375
	Interest-bearing deposits
		Transaction			792,186		979,642
		Savings			4,414,680		3,170,401
		Time			372,639		426,077
		Deposits in foreign branches			330,307		329,309
			Total interest-bearing deposits		5,909,812		4,905,429
	Total deposits			$	9,257,379	$	7,440,804
	The scheduled maturities of interest bearing time deposits are as follows at December 31, 2013 (in thousands):
	2014	$	343,654
	2015		25,599
	2016		1,105
	2017		2,041
	2018		167
	2019 and after		73
		$	372,639
	At December 31, 2013 and 2012, the Bank had approximately $27,139,000 and $30,310,000, respectively, in deposits from related parties, including directors, stockholders, and their related affiliates on terms similar to those from third parties.
	At December 31, 2013 and 2012, interest bearing time deposits, including deposits in foreign branches, of $100,000 or more were approximately $652,350,000 and $719,815,000, respectively.

Borrowing_Arrangements

Borrowing Arrangements	12 Months Ended
	Dec. 31, 2013
Borrowing Arrangements [Abstract]	'
Borrowing Arrangements	'
	(8)       Borrowing Arrangements
	The following table summarizes our borrowings at December 31, 2013, 2012 and 2011 (in thousands):
		2013			2012			2011
		Balance		Rate(3)	Balance		Rate(3)	Balance		Rate(3)
	Federal funds purchased(4)	$	148,650	0.22%	$	273,179	0.26%	$	412,249	0.27%
	Customer repurchase agreements(1)		21,954	0.31%		23,936	0.04%		23,801	0.06%
	FHLB borrowings(2)		840,026	0.12%		1,650,046	0.09%		1,200,066	0.14%
	Line of credit		15,000	2.65%		-	-		-	-
	Fed borrowings		-	-		-	-		132,000	0.75%
	Subordinated notes		111,000	6.50%		111,000	6.50%		-	-
	Trust preferred subordinated debentures		113,406	2.17%		113,406	2.24%		113,406	2.48%
	Total borrowings	$	1,250,036		$	2,171,567		$	1,881,522
	Maximum outstanding at any month end	$	1,859,036		$	2,432,945		$	1,986,324
			2013		2012		2011
	FHLB borrowing capacity relating to loans		$	693,302	$	267,542	$	4,524
	FHLB borrowing capacity relating to securities			8,482		33,204		15,909
		Total FHLB borrowing capacity	$	701,784	$	300,746	$	20,433
	Unused federal funds lines available from commercial banks		$	890,000	$	706,000	$	390,720
		Within One Year		After One But Within Three Years		After Three But Within Five Years		After Five Years		Total
	Federal funds purchased(1)	$	148,650	$	-	$	-	$	-	$	148,650
	Customer repurchase agreements(1)		21,954		-		-		-		21,954
	FHLB borrowings(1)		840,000		26		-		-		840,026
	Line of credit		15,000		-		-		-		15,000
	Subordinated notes(1)		-		-		-		111,000		111,000
	Trust preferred subordinated debentures(1)		-		-		-		113,406		113,406
	Total borrowings	$	1,025,604	$	26	$	-	$	224,406	$	1,250,036
	(1)       Excludes interest.

Trust_Preferred_Subordinated_D

Trust Preferred Subordinated Debentures	12 Months Ended
	Dec. 31, 2013
Trust Preferred Subordinated Debentures [Abstract]	'
Trust Preferred Subordinated Debentures	'
	(9)       Long-Term Debt
	From November 2002 to September 2006 various Texas Capital Statutory Trusts were created and subsequently issued floating rate trust preferred securities in various private offerings totaling $113.4 million. As of December 31, 2013, the details of the trust preferred subordinated debentures are summarized below (in thousands):
		Texas Capital Bancshares Statutory Trust I	Texas Capital Statutory Trust II	Texas Capital Statutory Trust III	Texas Capital Statutory Trust IV	Texas Capital Statutory Trust V
	Date issued	19-Nov-02	10-Apr-03	6-Oct-05	28-Apr-06	29-Sep-06
	Trust preferred securities issued	$10,310	$10,310	$25,774	$25,774	$41,238
	Floating or fixed rate securities	Floating	Floating	Floating	Floating	Floating
	Interest rate on subordinated debentures	3 month LIBOR + 3.35%	3 month LIBOR + 3.25%	3 month LIBOR + 1.51%	3 month LIBOR + 1.60%	3 month LIBOR + 1.71%
	Maturity date	Nov-32	Apr-33	Dec-35	Jun-36	Dec-36
	On September 21, 2012, we issued $111.0 million of subordinated notes. The notes mature in September 2042 and bear interest at a rate of 6.50% per annum, payable quarterly. The indenture governing the notes contains customary covenants and restrictions.
	Interest payments on all long-term debt are deductible for federal income tax purposes.
	Because our bank had less than $15.0 billion in total consolidated assets as of December 31, 2009, we are allowed to continue to classify our trust preferred securities, all of which were issued prior to May 19, 2010, as Tier 1 capital.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Income Taxes	'
	(10)       Income Taxes
	We have a gross deferred tax asset of $60.2 million and $51.1 million at December 31, 2013 and 2012, respectively, which relates primarily to our allowance for loan losses, loan origination fees and stock compensation. Management believes it is more likely than not that all of the deferred tax assets will be realized. Our net deferred tax asset is included in other assets in the consolidated balance sheet.
	Income tax expense/(benefit) consists of the following for the years ended (in thousands):
			Year ended December 31
			2013		2012		2011
	Current:
		Federal	$	76,481	$	69,092	$	47,799
		State		1,878		1,885		1,183
	Total		$	78,359	$	70,977	$	48,982
	Deferred
		Federal	$	-11,599	$	-3,131	$	-6,927
		State		-		-		245
	Total		$	-11,599	$	-3,131	$	-6,682
	Total expense
		Federal	$	64,882	$	65,961	$	40,872
		State		1,878		1,885		1,428
	Total		$	66,760	$	67,846	$	42,300
	The following table shows the breakdown of total income tax expense for continuing operations and discontinued operations for the years ended December 31, 2013, 2012 and 2011 (in thousands):
			2013		2012		2011
	Total expense (benefit):
		From continuing operations	$	66,757	$	67,866	$	42,366
		From discontinued operations		3		-20		-66
	Total		$	66,760	$	67,846	$	42,300
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of deferred tax assets and liabilities are as follows (in thousands):
			31-Dec
			2013		2012
	Deferred tax assets:
		Allowance for credit losses	$	32,752	$	27,725
		Loan origination fees		11,580		8,991
		Stock compensation		10,786		5,777
		Mark to market on mortgage loans		220		245
		Reserve for potential mortgage loan repurchases		20		20
		Non-accrual interest		1,907		2,739
		Deferred lease expense		1,316		957
		OREO valuation allowance		499		3,168
		Other		1,157		1,452
		Total deferred tax assets		60,237		51,074
	Deferred tax liabilities:
		Loan origination costs		-1,048		-1,113
		Leases		-6,587		-9,077
		Depreciation		-1,183		-1,077
		Unrealized gain on securities		-877		-1,762
		Other		-1,819		-1,769
		Total deferred tax liabilities		-11,514		-14,798
	Net deferred tax asset		$	48,723	$	36,276
	ASC 740-10, Income Taxes – Accounting for Uncertainties in Income Taxes (“ASC 740-10”) prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of cumulative benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. ASC 740-10 also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties.
	We file income tax returns in the U.S. federal jurisdiction and several U.S. state jurisdictions. We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2011.
	The reconciliation of income attributable to continuing operations computed at the U.S. federal statutory tax rates to income tax expense (benefit) is as follows:
		Year ended December 31
		2013	2012	2011
	Tax at U.S. statutory rate	35%	35%	35%
	State taxes	1%	1%	1%
	Non-deductible expenses	1%	1%	1%
	Non-taxable income	-1%	-1%	-1%
	Total	36%	36%	36%

Employee_Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2013
Employee Benefits [Abstract]	'
Employee Benefits	'
		2013	2012	2011
	Risk-free rate	1.17%	0.76%	1.83%
	Market price volatility factor	0.409	0.404	0.414
	Weighted-average expected life of options	5 years	5 years	5 years
	Market price volatility and expected life of options is based on historical data and other factors.
	A summary of our stock option activity and related information for 2013, 2012 and 2011 is as follows:
			31-Dec-13				31-Dec-12				31-Dec-11
			Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price
	Options outstanding at beginning of year			174,062	$	13.51		569,410	$	13.02		943,820	$	12.62
	Options exercised			-119,162		11.14		-391,348		12.74		-374,410		12
	Options forfeited			-		-		-4,000		19.37		-		-
	Options outstanding at year-end			54,900	$	18.65		174,062	$	13.51		569,410	$	13.02
	Options vested and exercisable at year-end			54,900	$	18.65		174,062	$	13.51		569,410	$	13.02
	Intrinsic value of options vested and exercisable		$	2,391,014			$	5,450,620			$	10,015,721
	Weighted average remaining contractual life of
		options vested and exercisable (in years)				0.97				1.15				2.06
	Intrinsic value of options exercised		$	4,176,787			$	10,246,387			$	5,496,861
	Weighted average remaining contractual life of
		options currently outstanding (in years)				0.97				1.15				2.06
	There was no expense related to stock option awards in 2013, 2012 and 2011. No stock options were granted in 2013, 2012 or 2011.
	In connection with the 2005 Long-term Incentive Plan, stock appreciation rights were issued in 2013, 2012 and 2011. These rights are service-based and generally vest over a period of five years.
			31-Dec-13				31-Dec-12				31-Dec-11
			SARs		Weighted Average Exercise Price		SARs / PSARs		Weighted Average Exercise Price		SARs / PSARs		Weighted Average Exercise Price
	SARs outstanding at beginning of year			640,220	$	20.9		983,700	$	19.56		1,213,257	$	19.42
	SARs granted			53,500		43.73		36,000		44.94		33,000		24.7
	SARs exercised			-134,271		19.21		-345,480		19.44		-236,610		19.86
	SARs forfeited			-22,300		18.99		-34,000		24.79		-25,947		16.56
	SARs outstanding at year-end			537,149	$	23.68		640,220	$	20.9		983,700	$	19.56
	SARs vested and exercisable at year-end			384,974	$	20.64		446,970	$	20.41		687,175	$	20.29
	Weighted average remaining contractual life of
		SARs vested				3.46				4.25				5.24
	Compensation expense		$	564,000			$	704,000			$	1,272,000
	Weighted average fair value of SARs granted
		during 2013, 2012 and 2011 (in years)			$	16.26			$	16.21			$	9.54
		Fair value of shares vested during the year	$	566,341			$	758,543			$	1,612,435
	Weighted average remaining contractual life of
		SARs currently outstanding (in years)				4.68				5.19				5.95
	As of December 31, 2013, 2012 and 2011, the intrinsic value of SARs vested was $16.0 million, $10.9 million and $7.1 million, respectively. As of December 31, 2011 the intrinsic value of SARs vested was negative as the December 31, 2011 market prices were lower than the grant price of the SARs.
	The following table summarizes the status of and changes in our nonvested restricted stock units:
			Non-Vested Stock Awards Outstanding
			Number of Shares	Weighted-Average Grant-Date Fair Value
	Balance, January 1, 2011		897,351	$	14.64
		Granted	165,891		24.77
		Vested and issued	-364,065		16.07
		Forfeited	-37,685		18.7
	Balance, December 31, 2011		661,492		17.44
		Granted	105,000		39.89
		Vested and issued	-311,410		18.82
		Forfeited	-43,163		25.25
	Balance, December 31, 2012		411,919		23.8
		Granted	163,500		45.35
		Vested and issued	-151,480		20.47
		Forfeited	-20,200		24.96
	Balance, December 31, 2013		403,739	$	33.72
	The RSUs granted during 2013, 2012 and 2011 vest over four to five years. Compensation cost for restricted stock units was $3,551,000, $4,875,000, $6,068,000 for years ended December 31, 2013, 2012 and 2011, respectively. The weighted average remaining contractual life of RSUs currently outstanding is 8.20 years.
	Total compensation cost for all share-based arrangements, net of taxes, was $2,677,000, $3,626,000 and $4,771,000 for the years ended December 31, 2013, 2012 and 2011, respectively.
	Unrecognized stock-based compensation expense related to SAR grants issued through December 31, 2013 was $1.5 million. At December 31, 2013, the weighted average period over which this unrecognized expense was expected to be recognized was 3.6 years. Unrecognized stock-based compensation expense related to RSU grants through December 31, 2013 was $11.6 million. At December 31, 2013, the weighted average period over which this unrecognized expense was expected to be recognized was 3.7 years.
	Cash flows from financing activities included $3,427,000, $22,197,000 and $8,970,000 in cash inflows from excess tax benefits related to stock compensation in 2013, 2012 and 2011, respectively. The tax benefit realized from stock options exercised is $1,200,000, $7,769,000 and $3,139,000 in 2013, 2012 and 2011, respectively.
	Upon share option exercise, new shares are issued as opposed to treasury shares.
	In connection with the 2010 Long-term Incentive Plan, a total of 173,035, 344,127 and 217,337 cash-based performance units were issued in 2013, 2012 and 2011, with a total of 616,620 outstanding at December 31, 2013. Of the outstanding units at December 31, 2013, 309,202 are service-based and vest over a period of five years. Additionally, 307,418 units contain both service and performance based vesting requirements: 25-40% of the units will vest on the third anniversary of the date of grant, and the balance will vest based on attainment of certain performance metrics developed by our Board of Directors' Human Resources Committee. Since these units have a cash payout feature, they are accounted for under the liability method and the related expense is based on the stock price at period end. Compensation cost for the units was $17,287,000, $6,440,000 and $522,000 for the years ended December 31, 2013, 2012, and 2011 respectively. At December 31, 2013, the weighted average remaining contractual life of the units was 8.13 years. Of the $17,287,000 compensation costs for 2013, approximately $4,618,000 related to a charge taken to reflect the financial effect of the planned organization changed announced during the second quarter of 2013 related to the retirement and transition of our CEO.
	Total compensation cost for all cash-based arrangements, net of taxes, for the years ended December 31, 2013, 2012 and 2011 was $11,237,000, $4,186,000 and $339,000, respectively.

Financial_Instruments_with_Off

Financial Instruments with Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2013
Financial Instruments with Off-Balance Sheet Risk [Abstract]	'
Financial Instruments with Off-Balance Sheet Risk	'
	(12) 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 that 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.
	At December 31, 2013 and 2012, commitments to extend credit and standby and commercial letters of credit were as follows (in thousands):
		31-Dec
		2013		2012
	Commitments to extend credit	$	3,674,391	$	2,648,454
	Standby letters of credit		145,662		83,429

Regulatory_Restrictions

Regulatory Restrictions	12 Months Ended
	Dec. 31, 2013
Regulatory Restrictions [Abstract]	'
Regulatory Restrictions	'
	(13) Regulatory Restrictions
	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.
	Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) 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 December 31, 2013, that the Company and the Bank meet all capital adequacy requirements to which they are subject.
	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 set forth in the tables below. As shown in the table below, the Company's capital ratios exceed the regulatory definition of adequately capitalized as of December 31, 2013 and 2012. 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.
	In response to supplemental FFIEC Call Report instructions issued in early April 2013, we began using a 100% risk weight for the mortgage finance loans with our March 31, 2013 Call Report and Form 10-Q. In previous filings, we applied a 50% risk weight (or 20% risk weight for government-guaranteed loans) to these assets for purposes of calculating the Bank's risk-based capital ratios. Having determined that the 100% risk weight must be applied under our current program we were required to amend our year-end Call Reports for 2012 and 2011. This change required application of the 100% risk weight to our mortgage finance loans in these earlier periods, which is consistent with all of our 2013 Call Reports. The amendment of Call Reports had no impact on our consolidated balance sheet or statements of operations, stockholders' equity and cash flows.
	This retroactive change in risk weighting of our mortgage finance loans required that we amend the previously reported values for our risk-weighted capital ratios for December 31, 2012 and 2011. See below for amended December 31, 2012 and 2011 risk-weighted capital ratios. These amended ratios exceed levels required to be “adequately capitalized” on a consolidated basis and at the Bank. As amended, the Bank was “well capitalized” in the Tier 1 measure of capital adequacy, but the total risk-based capital ratio was below that required to be considered “well capitalized”. The adjustment had no impact on the ratio of tangible common equity to total assets. We believe that we had the financial and operational capacity to maintain well-capitalized status had we determined that the higher risk weighting was required to be applied to our ownership interests in mortgage finance loans at year-end 2012 and 2011.
	Incidental to the amended Call Reports described above, we were assessed an additional $3.0 million for deposit insurance by the FDIC that was paid during the third quarter of 2013.
	Because our bank had less than $15.0 billion in total consolidated assets as of December 31, 2009, we are allowed to continue to classify our trust preferred securities, all of which were issued prior to May 19, 2010, as Tier 1 capital.
				Actual			For Capital Adequacy Purposes			To Be Well Capitalized Under Prompt Corrective Action Provisions
	(Dollars in thousands)			Amount	Ratio		Amount	Ratio		Amount	Ratio
	As of December 31, 2013:
	Total capital (to risk-weighted assets):
		Company	$	1,387,312	10.73%	$	1,034,721	8.00%		N/A	N/A
		Bank		1,328,227	10.27%		1,034,406	8.00%	$	1,293,007	10.00%
	Tier 1 capital (to risk-weighted assets):
		Company	$	1,184,018	9.15%	$	517,361	4.00%		N/A	N/A
		Bank		975,933	7.55%		517,203	4.00%	$	775,804	6.00%
	Tier 1 capital (to average assets):
		Company	$	1,184,018	10.87%	$	435,750	4.00%		N/A	N/A
		Bank		975,933	8.96%		435,601	4.00%	$	544,502	5.00%
	As of December 31, 2012:
	Total capital (to risk-weighted assets):
		Company	$	1,112,924	9.97%	$	893,231	8.00%		N/A	N/A
		Bank		948,328	8.50%		892,806	8.00%	$	1,116,008	10.00%
	Tier 1 capital (to risk-weighted assets):
		Company	$	923,677	8.27%	$	446,616	4.00%		N/A	N/A
		Bank		800,081	7.17%		446,403	4.00%	$	669,605	6.00%
	Tier 1 capital (to average assets):
		Company	$	923,677	9.41%	$	392,649	4.00%		N/A	N/A
		Bank		800,081	8.16%		392,433	4.00%	$	490,541	5.00%
	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 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 be paid by our bank. No dividends were declared or paid on common stock during 2013, 2012 or 2011.
	The required reserve balances at the Federal Reserve at December 31, 2013 and 2012 were approximately $51,692,000 and $33,141,000, respectively.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	(14) Earnings Per Share
	The following table presents the computation of basic and diluted earnings per share (in thousands except share data):
				Year ended December
				2013		2012		2011
	Numerator:
		Net income from continuing operations		$	121,046	$	120,709	$	76,102
		Preferred stock dividends			7,394		-		-
		Net income from continuing operations available to common shareholders			113,652		120,709		76,102
		Gain (loss) from discontinued operations			5		-37		-126
		Net income		$	113,657	$	120,672	$	75,976
	Denominator:
		Denominator for basic earnings per share - weighted average shares			40,864,225		39,046,340		37,334,743
		Effect of employee stock-based awards(1)			402,593		645,771		682,694
		Effect of warrants to purchase common stock			513,063		473,736		315,640
		Denominator for dilutive earnings per share - adjusted weighted average
			shares and assumed conversions		41,779,881		40,165,847		38,333,077
	Basic earnings per common share from continuing operations			$	2.78	$	3.09	$	2.04
	Basic earnings per common share			$	2.78	$	3.09	$	2.03
	Diluted earnings per share from continuing operations			$	2.72	$	3.01	$	1.99
	Diluted earnings per common share			$	2.72	$	3	$	1.98
	(1)       SARs and RSUs outstanding of 118,500, 79,500 and 98,000 in 2013, 2012 and 2011, respectively, have not been included in diluted earnings per share because to do so would have been antidilutive for the periods presented. Stock options are antidilutive when the exercise price is higher than the average market price of the Company's common stock.

Fair_Value_Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures	'
	(15) 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 enhances 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. The adoption of ASC 820 did not have an impact on our financial statements except for the expanded disclosures noted below.
	We determine the fair market values of our financial instruments based on the fair value hierarchy. 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 1 assets include U.S. Treasuries that are highly liquid and are actively traded in over-the-counter markets.
	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, corporate 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 also 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 December 31, 2013 and 2012 are as follows (in thousands):
	31-Dec-13			Fair Value Measurements Using
				Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Mortgage-backed securities	$	-	$	41,462	$	-
		Municipals		-		14,505		-
		Equity securities		-		7,247		-
	Loans(2) (4)			-		-		13,474
	OREO(3) (4)			-		-		5,110
	Derivative asset(5)			-		9,317		-
	Derivative liability(5)			-		-9,317		-
	31-Dec-12			Fair Value Measurements Using
				Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Mortgage-backed securities	$	-	$	61,581	$	-
		Corporate securities		-		5,080		-
		Municipals		-		25,894		-
		Equity securities		-		7,640		-
	Loans(2) (4)			-		-		11,639
	OREO(3) (4)			-		-		15,991
	Derivative asset(5)			-		28,473		-
	Derivative liability(5)			-		-28,473		-
			31-Dec-13					31-Dec-12
			Carrying		Estimated			Carrying		Estimated
			Amount		Fair Value			Amount		Fair Value
	Cash and cash equivalents	$	153,911	$	153,911		$	206,348	$	206,348
	Securities, available-for-sale		63,214		63,214			100,195		100,195
	Loans held for sale from discontinued operations		294		294			302		302
	Loans held for investment, net		11,182,970		11,179,145			9,886,470		9,889,303
	Derivative asset		9,317		9,317			28,473		28,473
	Deposits		9,257,379		9,257,574			7,440,804		7,441,240
	Federal funds purchased		148,650		148,650			273,179		273,179
	Other borrowings		876,980		861,981			1,673,982		1,673,983
	Subordinated notes		111,000		96,647			111,000		112,757
	Trust preferred subordinated debentures		113,406		113,406			113,406		113,406
	Derivative liability		9,317		9,317			28,473		28,473
	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 mortgage finance loans 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, other borrowings, subordinated notes and trust preferred subordinated debentures
	The carrying value reported in the consolidated balance sheet for Federal funds purchased 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.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	(16) Commitments and Contingencies
	We lease various premises under operating leases with various expiration dates ranging from March 2013 through May 2024. Rent expense incurred under operating leases amounted to approximately $10,216,000, $8,993,000 and $7,982,000 for the years ended December 31, 2013, 2012 and 2011, respectively.
	Minimum future lease payments under operating leases are as follows (in thousands):
	Year ending December 31,	Minimum Payments
	2014	$	13,483
	2015		14,136
	2016		14,085
	2017		14,038
	2018		13,960
	2019 and thereafter		62,335
		$	132,037

Parent_Company_Only

Parent Company Only	12 Months Ended
	Dec. 31, 2013
Parent Company Only [Abstract]	'
Parent Company Only	'
	(17) Parent Company Only
	Summarized financial information for Texas Capital Bancshares, Inc. – Parent Company Only follows (in thousands):
	Balance Sheet			31-Dec
				2013		2012
	Assets
	Cash and cash equivalents			$	47,605	$	141,257
	Investment in subsidiaries				1,011,823		836,204
	Other assets				287,734		94,121
	Total assets			$	1,347,162	$	1,071,582
	Liabilities and Stockholders' Equity
	Other liabilities			$	1,254	$	782
	Line of credit				15,000		-
	Subordinated notes				111,000		111,000
	Trust preferred subordinated debentures				113,406		113,406
	Total liabilities				240,660		225,188
	Preferred stock				150,000		-
	Common stock				410		407
	Additional paid-in capital				458,360		460,268
	Retained earnings				496,112		382,455
	Treasury stock				-8		-8
	Accumulated other comprehensive income				1,628		3,272
	Total stockholders' equity				1,106,502		846,394
	Total liabilities and stockholders' equity			$	1,347,162	$	1,071,582
					-
	Statement of Earnings	Year ended December 31
		2013		2012		2011
	Loan income	$	10,382	$	1,484	$	-
	Dividend income		76		83		77
	Other income		72		38		72
	Total income		10,530		1,605		149
	Interest expense		9,863		4,913		2,573
	Salaries and employee benefits		669		668		618
	Legal and professional		2,605		2,094		1,919
	Other non-interest expense		651		744		450
	Total expense		13,788		8,419		5,560
	Loss before income taxes and equity in undistributed income of subsidiary		-3,258		-6,814		-5,411
	Income tax benefit		-1,165		-2,435		-1,887
	Loss before equity in undistributed income of subsidiary		-2,093		-4,379		-3,524
	Equity in undistributed income of subsidiary		123,144		124,951		79,500
	Net income		121,051		120,572		75,976
	Preferred stock dividends		7,394		-		-
	Net income available to common shareholders	$	113,657	$	120,572	$	75,976
	Statements of Cash Flows		Year ended December 31
			2013		2012		2011
			(in thousands)
	Operating Activities
	Net income		$	121,051	$	120,572	$	75,976
	Adjustments to reconcile net income to net cash used in operating activities:
		Equity in undistributed income of subsidiary		-123,144		-124,951		-79,500
		Increase in other assets		-3,613		-11,562		-3,747
		Tax benefit from stock option exercises		1,200		7,769		3,139
		Excess tax benefits from stock-based compensation arrangements		-3,427		-22,197		-8,970
		Increase (decrease) in other liabilities		37		83		262
	Net cash used in operating activities of continuing operations			-7,896		-30,286		-12,840
	Investing Activity
	Investment in subsidiaries			-240,000		-70,000		-66,000
	Net cash used in investing activity			-240,000		-70,000		-66,000
	Financing Activities
	Proceeds from sale of stock related to stock-based awards			-2,210		355		2,190
	Proceeds from sale of stock			-		86,987		-
	Proceeds from issuance of preferred stock			144,987		-		-
	Preferred dividends paid			-6,960		-		-
	Issuance of subordinated notes			-		111,000		-
Net other borrowings			15,000		-		-
Excess tax benefits from stock-based compensation arrangements			3,427		22,197		8,970
Net cash provided by financing activities			154,244		220,539		11,160
Net increase (decrease) in cash and cash equivalents			-93,652		120,253		-67,680
Cash and cash equivalents at beginning of year			141,257		21,004		88,684
Cash and cash equivalents at end of year		$	47,605	$	141,257	$	21,004

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	(18) Related Party Transactions
	See Note 7 for a description of deposits with related parties.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations [Abstract]	'
Discontinued Operations	'
		Year ended December 31
		2013		2012		2011
	Revenues	$	27	$	-26	$	58
	Expenses		19		31		250
	Income (loss) before income taxes		8		-57		-192
	Income tax expense (benefit)		3		-20		-66
	Income (loss) from discontinued operations	$	5	$	-37	$	-126

Derivative_Financial_Instrumen

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2013
Derivative Financial Instruments [Abstract]	'
Derivative Financial Instruments	'
	(20) 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 2013 and 2012, 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 December 31, 2013 and 2012 presented in the following table (in thousands):
			31-Dec-13				31-Dec-12
			Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
	Non-hedging interest rate derivative:
		Commercial loan/lease interest rate swaps	$	764,939	$	8,652	$	523,216	$	28,469
		Commercial loan/lease interest rate swaps		-764,939		-8,652		-523,216		-28,469
		Commercial loan/lease interest rate caps		-58,706		-665		-42,380		-4
		Commercial loan/lease interest rate caps		58,706		665		42,380		4
	The weighted-average receive and pay interest rates for interest rate swaps outstanding at December 31, 2013 were as follows:
		31-Dec-13		31-Dec-12
		Weighted-Average Interest Rate		Weighted-Average Interest Rate
		Received	Paid	Received	Paid
	Non-hedging interest rate swaps	2.99%	4.89%	4.76%	3.11%
	The weighted-average strike rate for outstanding interest rate caps was 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 $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 December 31, 2013 and 2012, we had $10.7 million and $12.3 million in cash collateral pledged for these derivatives included in interest-bearing deposits.

Stockholders_Equity

Stockholder's Equity	1 Months Ended
	Mar. 28, 2013
Stockholders' Equity [Abstract]	'
Stockholders' Equity	'
	(21) Stockholders' Equity
	In January 2009, we issued $75 million of perpetual preferred stock and related warrants under the U.S. Department of Treasury's voluntary Capital Purchase Program. The preferred stock was repurchased in May 2009 and the U.S. Treasury auctioned the related warrants in the first quarter of 2010. As of December 31, 2013, warrants to purchase 710,598 shares at $14.84 per share are still outstanding.
	On August 1, 2012 we completed a sale of 2.3 million shares of our common stock in a public offering. Net proceeds from the sale totaled $87.0 million. The additional equity is being used for general corporate purposes, including retirement of $15.0 million of debt and additional capital to support continued loan growth at our bank.
	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 $7.0 million in dividends on the preferred stock for the year ended December 31, 2013 2013. 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 is being used for general corporate purposes, including funding regulatory capital infusions into the Bank.

Quarterly_Financial_Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]	'
Quarterly Financial Information	'
	(22) Quarterly Financial Data (unaudited)
	The tables below summarize our quarterly financial information for the years December 31, 2013 and 2012 (in thousands except per share and average share data):
			2013 Selected Quarterly Financial Data
			Fourth		Third		Second		First
	Interest income		$	117,965	$	115,217	$	107,264	$	104,179
	Interest expense			6,490		6,441		6,044		6,137
	Net interest income			111,475		108,776		101,220		98,042
	Provision for credit losses			5,000		5,000		7,000		2,000
	Net interest income after provision for credit losses			106,475		103,776		94,220		96,042
	Non-interest income			11,184		10,431		11,128		11,281
	Non-interest expense			70,291		62,009		68,734		55,700
	Income from continuing operations before income taxes			47,368		52,198		36,614		51,623
	Income tax expense			17,012		18,724		12,542		18,479
	Income from continuing operations			30,356		33,474		24,072		33,144
	Loss from discontinued operations (after-tax)			3		2		1		-1
	Net income			30,359		33,476		24,073		33,143
	Preferred stock dividends			2,438		2,437		2,438		81
	Net income available to common shareholders		$	27,921	$	31,039	$	21,635	$	33,062
	Basic earnings per share:
		Income from continuing operations	$	0.68	$	0.76	$	0.53	$	0.82
		Net income	$	0.68	$	0.76	$	0.53	$	0.82
	Diluted earnings per share:
		Income from continuing operations	$	0.67	$	0.74	$	0.52	$	0.8
		Net income	$	0.67	$	0.74	$	0.52	$	0.8
	Average shares
		Basic		40,983,000		40,902,000		40,814,000		40,474,000
		Diluted		41,889,000		41,792,000		41,724,000		41,429,000
	(In thousands except per share and average share data)		2012 Selected Quarterly Financial Data
			Fourth		Third		Second		First
	Interest income		$	107,769	$	102,011	$	95,546	$	93,131
	Interest expense			6,614		5,156		4,906		4,902
	Net interest income			101,155		96,855		90,640		88,229
	Provision for credit losses			4,500		3,000		1,000		3,000
	Net interest income after provision for credit losses			96,655		93,855		89,640		85,229
	Non-interest income			12,836		10,552		10,462		9,190
	Non-interest expense			60,074		53,521		53,973		52,276
	Income from continuing operations before income taxes			49,417		50,886		46,129		42,143
	Income tax expense			17,982		18,316		16,506		15,062
	Income from continuing operations			31,435		32,570		29,623		27,081
	Loss from discontinued operations (after-tax)			-6		-34		-1		4
	Net income		$	31,429	$	32,536	$	29,622	$	27,085
	Basic earnings per share:
		Income from continuing operations	$	0.78	$	0.82	$	0.78	$	0.72
		Net income	$	0.78	$	0.82	$	0.78	$	0.72
	Diluted earnings per share:
		Income from continuing operations	$	0.76	$	0.8	$	0.76	$	0.7
		Net income	$	0.76	$	0.8	$	0.76	$	0.7
	Average shares
		Basic		40,446,000		39,618,000		38,013,000		37,795,000
		Diluted		41,505,000		40,756,000		39,142,000		38,914,000

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events [Text Block]	'
	(23) Subsequent Events
	On January 29, 2014, we completed a sale of 1.7 million shares of our common stock in a public offering. Net proceeds from the sale totaled $96.6 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 $172.1 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 depositors, 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 the offerings were available to the Company for general corporate purposes, including retirement of $15.0 million of short-term debt, and as additional capital to support continued loan growth.

New_Accounting_Standards

New Accounting Standards	12 Months Ended
	Dec. 31, 2013
New Accounting Standards [Abstract]	'
New Accounting Standards	'
	(24) New Accounting Standards
	ASU 2013-01, “Balance Sheet (Topic 210) – Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities” (“ASU 2013-01”) amends Topic 210, “Balance Sheet” to clarify that the scope of ASU 2011-11, “Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities” would apply to derivatives including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and securities borrowing and securities lending transactions that are offset in accordance with Topic 815, “Derivatives and Hedging”. ASU 2013-01 was effective January 1, 2013 and did not have a significant impact on our financial statements.
	ASU 2013-02, “Comprehensive Income (Topic 220) – Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income” (“ASU 2013-02”) amends Topic 220, “Comprehensive Income” to improve the reporting of reclassifications out of accumulated other comprehensive income. Entities are required to separately present significant amounts reclassified out of accumulated other comprehensive income for each component of accumulated other comprehensive income and to disclose, for each affected line item in the income statement, the amount of accumulated other comprehensive income that has been reclassified into that line item. ASU 2013-02 was effective for fiscal years, and interim periods within those years, beginning after December 13, 2012 and did not have a significant impact on our financial statements.
	ASU 2011-04, “Fair Value Measurement (Topic 820) – Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRSs” (“ASU 2011-04”) amends Topic 820, “Fair Value Measurements and Disclosures,” to converge the fair value measurement guidance in U.S. generally accepted accounting principles and International Financial Reporting Standards (“IFRS”). ASU 2011-04 clarifies the application of existing fair value measurement requirements, changes certain principles in Topic 820 and requires additional fair value disclosures. ASU 2011-04 was effective for annual periods beginning after December 15, 2011, and did not have a significant impact on our financial statements.
	ASU 2011-05, “Comprehensive Income (Topic 220) – Presentation of Comprehensive Income” (“ASU 2011-05”) amends Topic 220, “Comprehensive Income,” to require that all non-owner changes in stockholders' equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. Additionally, ASU 2011-05 requires entities to present, on the face of the financial statements, reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement or statements where the components of net income and the components of other comprehensive income are presented. The option to present components of other comprehensive income as part of the statement of changes in stockholders' equity was eliminated. ASU 2011-05 was effective for annual and interim periods beginning after December 15, 2011; however certain provisions related to the presentation of reclassification adjustments have been deferred by ASU 2011-12 “Comprehensive Income (Topic 820) – Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05.” ASU 2011-05 did not have a significant impact on our financial statements.
	ASU 2011-08, “Intangibles – Goodwill and Other (Topic 350) – Testing Goodwill for Impairment” (“ASU 2011-08”) amends Topic 350, “Intangibles – Goodwill and Other,” to give entities the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. However, if an entity concludes otherwise, then it is required to perform the first step of the two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. ASU 2011-08 was effective of annual and interim impairment tests beginning after December 15, 2011, and did not have a significant impact on our financial statements.
	ASU 2011-11, “Balance Sheet (Topic 210) – “Disclosures about Offsetting Assets and Liabilities” (“ASU 2011-11”) amends Topic 210, “Balance Sheet,” to require an entity to disclose both gross and net information about financial instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. ASU 2011-11 is effective for annual and interim periods beginning on January 1, 2013, and is not expected to have a significant impact on our financial statements.

Summary_of_Significant_Account

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Operations and Summary of Significant Accounting Policies [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 doing business in March 1998, but did not commence banking operations until 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, N.A. (“the Bank”). The Bank currently provides commercial banking services to its customers largely in Texas and concentrates on middle market commercial businesses and successful professionals and entrepreneurs.
Basis of Presentation	'
	Basis of Presentation
	The accounting and reporting policies of Texas Capital Bancshares, Inc. conform to accounting principles generally accepted in the United States and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“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 possible 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
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash equivalents include amounts due from banks 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 December 31, 2013 and 2012.
Loans	'
	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	'
	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 (loss), net. Accumulated comprehensive income (loss), net for the three years ended December 31, 2013 is reported in the accompanying consolidated statements of changes in stockholders' equity.
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. Diluted earnings per common share include the dilutive effect of stock options and non-vested stock awards granted 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 14 – Earnings Per 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.

Securities_Tables

Securities (Tables)	12 Months Ended
	Dec. 31, 2013
Securities	'
Schedule of summary of securities	'
					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
					31-Dec-12
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	57,342	$	4,239	$	-	$	61,581
		Corporate securities			5,000		80		-		5,080
		Municipals			25,300		594		-		25,894
		Equity securities(1)			7,519		121		-		7,640
				$	95,161	$	5,034	$	-	$	100,195
Schedule of amortized cost and estimated fair value of securities	'
					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%		0.00%		-		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
					31-Dec-12
							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	$	656	$	5,698	$	23,111	$	27,877	$	57,342
			Estimated fair value		690		6,113		24,948		29,830		61,581
			Weighted average yield(3)		4.20%		5.29%		4.86%		3.41%		4.19%
		Corporate securities:
			Amortized cost		-		5,000		-		-		5,000
			Estimated fair value		-		5,080		-		-		5,080
			Weighted average yield(3)		-		7.38%		-		-		7.38%
		Municipals:(2)
			Amortized cost		6,575		16,448		2,277		-		25,300
			Estimated fair value		6,646		16,895		2,353		-		25,894
			Weighted average yield(3)		5.75%		5.66%		6.01%		-		5.72%
		Equity securities:(4)
			Amortized cost		7,519		-		-		-		7,519
			Estimated fair value		7,640		-		-		-		7,640
		Total available-for-sale securities:
			Amortized cost									$	95,161
			Estimated fair value									$	100,195
Schedule of investment securities that have been in a continuous unrealized loss position for less or more than 12 months	'
			Less Than 12 Months				12 Months or Longer				Total
			Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
			Value		Loss		Value		Loss		Value		Loss
	Equity securities	$	7,247	$	-275	$	-	$	-	$	7,247	$	-275

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2013
Loans and Allowance for Credit Losses [Abstract]	'
Schedule of loans held for investments	'
		31-Dec
		2013		2012
	Commercial	$	5,020,565	$	4,106,419
	Mortgage finance		2,784,265		3,175,272
	Construction		1,262,905		737,637
	Real estate		2,146,228		1,892,451
	Consumer		15,350		19,493
	Equipment leases		93,160		69,470
	Gross loans held for investment		11,322,473		10,000,742
	Deferred income (net of direct origination costs)		-51,899		-39,935
	Allowance for loan losses		-87,604		-74,337
	Total	$	11,182,970	$	9,886,470
Schedule of the credit risk profile of loan portfolio by internally assigned grades and nonaccrual status	'
	31-Dec-13				Mortgage
			Commercial		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
	31-Dec-12				Mortgage
			Commercial		Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	4,013,538	$	3,175,272	$	703,673	$	1,816,027	$	19,436	$	68,327	$	9,796,273
		Special mention		33,137		-		11,957		12,461		-		919		58,474
		Substandard-accruing		44,371		-		4,790		40,897		-		104		90,162
		Non-accrual		15,373		-		17,217		23,066		57		120		55,833
	Total loans held for investment		$	4,106,419	$	3,175,272	$	737,637	$	1,892,451	$	19,493	$	69,470	$	10,000,742
Schedule of activity in the reserve for loan losses by portfolio segment	'
	31-Dec-13					Mortgage
	(in thousands)			Commercial		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				23,693		-		2,456		-6,809		-105		325		-1,395		18,165
	Charge-offs				6,575		-		-		144		45		2		-		6,766
	Recoveries				1,203		-		-		270		73		322		-		1,868
	Net charge-offs (recoveries)				5,372		-		-		-126		-28		-320		-		4,898
	Ending balance			$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	Period end amount allocated to:
		Loans individually evaluated
			for impairment	$	2,015	$	-	$	-	$	1,143	$	8	$	8	$	-	$	3,174
		Loans collectively evaluated
			for impairment		37,853		-		14,553		23,067		141		3,097		5,719		84,430
	Ending balance			$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	31-Dec-12					Mortgage
	(in thousands)			Commercial		Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance			$	17,337	$	-	$	7,845	$	33,721	$	223	$	2,356	$	8,813	$	70,295
	Provision for loan losses				10,086		-		4,242		-2,741		19		200		-1,699		10,107
	Charge-offs				6,708		-		-		899		49		204		-		7,860
	Recoveries				832		-		10		812		33		108		-		1,795
	Net charge-offs (recoveries)				5,876		-		-10		87		16		96		-		6,065
	Ending balance			$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
	Period end amount allocated to:
		Loans individually evaluated
			for impairment	$	2,983	$	-	$	14	$	899	$	16	$	18	$	-	$	3,930
		Loans collectively evaluated
			for impairment		18,564		-		12,083		29,994		210		2,442		7,114		70,407
	Ending balance			$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
						Mortgage
	31-Dec-13			Commercial		Finance		Construction		Real Estate		Consumer		Lease		Total
	Loans individually evaluated
		for impairment	$	15,140	$	-	$	705	$	24,027	$	54	$	50	$	39,976
	Loans collectively evaluated
		for impairment		5,005,425		2,784,265		1,262,200		2,122,201		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
						Mortgage
	31-Dec-12			Commercial		Finance		Construction		Real Estate		Consumer		Lease		Total
	Loans individually evaluated
		for impairment	$	15,373	$	-	$	18,179	$	32,512	$	57	$	120	$	66,241
	Loans collectively evaluated
		for impairment		4,091,046		3,175,272		719,458		1,859,939		19,436		69,350		9,934,501
	Total		$	4,106,419	$	3,175,272	$	737,637	$	1,892,451	$	19,493	$	69,470	$	10,000,742
Schedule of non-accrual loans by type and purpose	'
	Commercial
		Business loans	$	12,896
	Construction
		Market risk		705
	Real estate
		Market risk		15,607
		Commercial		508
		Secured by 1-4 family		2,555
	Consumer			54
	Leases			50
	Total non-accrual loans		$	32,375
Schedule of impaired loans, by portfolio class	'
	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 loans		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		-		-		-		-		-
	Equipment 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 loans		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		-
	Equipment 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 loans		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		-
	Equipment leases		50		50		8		72		-
	Total impaired loans	$	39,976	$	43,170	$	3,174	$	50,794	$	114
	31-Dec-12
			Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	With no related allowance recorded:
	Commercial
	Business loans	$	2,938	$	2,938	$	-	$	1,409	$	-
	Construction
	Market risk		17,217		17,217		-		18,571		677
	Real estate
	Market risk		9,061		9,061		-		7,944		-
	Commercial		6,604		6,604		-		6,451		-
	Secured by 1-4 family		2,632		2,632		-		1,827		-
	Consumer		-		-		-		-		-
	Equipment leases		-		-		-		-		-
	Total impaired loans with no allowance recorded	$	38,452	$	38,452	$	-	$	36,202	$	677
	With an allowance recorded:
	Commercial
	Business loans	$	12,435	$	18,391	$	2,983	$	15,484	$	-
	Construction
	Market risk		962		962		14		321		-
	Real estate
	Market risk		11,439		11,439		535		11,811		-
	Commercial		2,013		2,013		89		671		-
Secured by 1-4 family		763		763		275		1,632		-
Consumer		57		57		16		59		-
Equipment leases		120		120		18		182		-
Total impaired loans with an allowance recorded	$	27,789	$	33,745	$	3,930	$	30,160	$	-
Combined:
Commercial
Business loans	$	15,373	$	21,329	$	2,983	$	16,893	$	-
Construction
Market risk		18,179		18,179		14		18,892		677
Real estate
Market risk		20,500		20,500		535		19,755		-
Commercial		8,617		8,617		89		7,122		-
Secured by 1-4 family		3,395		3,395		275		3,459		-
Consumer		57		57		16		59		-
Equipment leases		120		120		18		182		-
Total impaired loans	$	66,241	$	72,197	$	3,930	$	66,362	$	677
Schedule of an age analysis of accruing past due loans	'
			30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total(1)
	Commercial
		Business loans	$	29,946	$	7,683	$	7,528	$	45,157	$	4,027,409	$	4,072,566
		Energy		5,239		1,092		-		6,331		928,772		935,103
	Mortgage finance loans			-		-		-		-		2,784,265		2,784,265
	Construction
		Market risk		1		-		103		104		1,245,388		1,245,492
		Secured by 1-4 family		-		-		-		-		16,708		16,708
	Real estate
		Market risk		6,013		3,100		-		9,113		1,623,706		1,632,819
		Commercial		15,024		-		-		15,024		387,856		402,880
		Secured by 1-4 family		2,607		266		1,694		4,567		87,292		91,859
	Consumer			37		177		-		214		15,082		15,296
	Equipment leases			189		-		-		189		92,921		93,110
	Total loans held for investment		$	59,056	$	12,318	$	9,325	$	80,699	$	11,209,399	$	11,290,098
Schedule of loans that have been restructured	'
	31-Dec-13
		Number of Contracts			Pre-Restructuring Outstanding Recorded Investment			Post-Restructuring Outstanding Recorded Investment
	Commercial business loans		3		$	10,823		$	8,921
	Real estate market risk		1			892			874
	Total new restructured loans in 2012		4		$	11,715		$	9,795
	31-Dec-12
		Number of Contracts			Pre-Restructuring Outstanding Recorded Investment			Post-Restructuring Outstanding Recorded Investment
	Commercial business loans		3		$	7,140		$	7,103
	Real estate market risk		2			1,726			1,147
	Real estate - 1-4 family		1			1,424			1,393
	Total new restructured loans in 2012		6		$	10,290		$	9,643
		December 31,
		2013		2012
	Extended maturity	$	874	$	1,913
	Adjusted payment schedule		-		1,393
	Combination of maturity extension and payment schedule adjustment		8,921		6,337
	Total	$	9,795	$	9,643

OREO_and_Valuation_Allowance_f1

OREO and Valuation Allowance for Losses on OREO (Tables)	12 Months Ended
	Dec. 31, 2013
OREO and Valuation Allowance for Losses on OREO [Abstract]	'
Schedule of the activity related to OREO	'
		Year ended December 31
		2013		2012		2011
	Beginning balance	$	15,991	$	34,077	$	42,261
	Additions		1,331		3,434		22,180
	Sales		-11,292		-14,637		-23,566
	Valuation allowance for OREO		958		-4,488		-3,922
	Direct write-downs		-1,878		-2,395		-2,876
	Ending balance	$	5,110	$	15,991	$	34,077

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Other Intangible Assets [Abstract]	'
Schedule of goodwill and other intangibles	'
		Gross Goodwill and Intangible Assets		Accumulated Amortization		Net Goodwill and Intangible Assets
	31-Dec-13
	Goodwill	$	15,370	$	-374	$	14,996
	Intangible assets - customer relationships and trademarks		9,104		-2,814		6,290
	Total goodwill and intangible assets	$	24,474	$	-3,188	$	21,286
	31-Dec-12
	Goodwill	$	14,416	$	-374	$	14,042
	Intangible assets - customer relationships and trademarks		7,996		-2,155		5,841
	Total goodwill and intangible assets	$	22,412	$	-2,529	$	19,883
Schedule of amortization expense related to intangible assets	'
	2014	$	699
	2015		598
	2016		501
	2017		473
	2018		473
	Thereafter		3,546
		$	6,290

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Premises and Equipment [Abstract]	'
Schedule of premies and equipment	'
		31-Dec
		2013		2012
	Premises	$	14,113	$	12,950
	Furniture and equipment		28,865		26,478
			42,978		39,428
	Accumulated depreciation		-31,496		-27,983
	Total premises and equipment, net	$	11,482	$	11,445

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Schedule of deposits	'
					2013		2012
	Non-interest bearing demand deposits			$	3,347,567	$	2,535,375
	Interest-bearing deposits
		Transaction			792,186		979,642
		Savings			4,414,680		3,170,401
		Time			372,639		426,077
		Deposits in foreign branches			330,307		329,309
			Total interest-bearing deposits		5,909,812		4,905,429
	Total deposits			$	9,257,379	$	7,440,804
Schedule of maturities of interest bearing time deposits	'
	2014	$	343,654
	2015		25,599
	2016		1,105
	2017		2,041
	2018		167
	2019 and after		73
		$	372,639

Borrowing_Arrangements_Tables

Borrowing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2013
Borrowing Arrangements [Abstract]	'
Schedule of borrowings	'
		2013			2012			2011
		Balance		Rate(3)	Balance		Rate(3)	Balance		Rate(3)
	Federal funds purchased(4)	$	148,650	0.22%	$	273,179	0.26%	$	412,249	0.27%
	Customer repurchase agreements(1)		21,954	0.31%		23,936	0.04%		23,801	0.06%
	FHLB borrowings(2)		840,026	0.12%		1,650,046	0.09%		1,200,066	0.14%
	Line of credit		15,000	2.65%		-	-		-	-
	Fed borrowings		-	-		-	-		132,000	0.75%
	Subordinated notes		111,000	6.50%		111,000	6.50%		-	-
	Trust preferred subordinated debentures		113,406	2.17%		113,406	2.24%		113,406	2.48%
	Total borrowings	$	1,250,036		$	2,171,567		$	1,881,522
	Maximum outstanding at any month end	$	1,859,036		$	2,432,945		$	1,986,324
Schedule of borrowing capacities	'
			2013		2012		2011
	FHLB borrowing capacity relating to loans		$	693,302	$	267,542	$	4,524
	FHLB borrowing capacity relating to securities			8,482		33,204		15,909
		Total FHLB borrowing capacity	$	701,784	$	300,746	$	20,433
	Unused federal funds lines available from commercial banks		$	890,000	$	706,000	$	390,720
Schedule of maturities of the borrowings	'
		Within One Year		After One But Within Three Years		After Three But Within Five Years		After Five Years		Total
	Federal funds purchased(1)	$	148,650	$	-	$	-	$	-	$	148,650
	Customer repurchase agreements(1)		21,954		-		-		-		21,954
	FHLB borrowings(1)		840,000		26		-		-		840,026
	Line of credit		15,000		-		-		-		15,000
	Subordinated notes(1)		-		-		-		111,000		111,000
	Trust preferred subordinated debentures(1)		-		-		-		113,406		113,406
	Total borrowings	$	1,025,604	$	26	$	-	$	224,406	$	1,250,036

Trust_Preferred_Subordinated_D1

Trust Preferred Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2013
Trust Preferred Subordinated Debentures [Abstract]	'
Schedule of details of the trust preferred subordinated debentures	'
		Texas Capital Bancshares Statutory Trust I	Texas Capital Statutory Trust II	Texas Capital Statutory Trust III	Texas Capital Statutory Trust IV	Texas Capital Statutory Trust V
	Date issued	19-Nov-02	10-Apr-03	6-Oct-05	28-Apr-06	29-Sep-06
	Trust preferred securities issued	$10,310	$10,310	$25,774	$25,774	$41,238
	Floating or fixed rate securities	Floating	Floating	Floating	Floating	Floating
	Interest rate on subordinated debentures	3 month LIBOR + 3.35%	3 month LIBOR + 3.25%	3 month LIBOR + 1.51%	3 month LIBOR + 1.60%	3 month LIBOR + 1.71%
	Maturity date	Nov-32	Apr-33	Dec-35	Jun-36	Dec-36

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Schedule of components of income tax expense	'
			Year ended December 31
			2013		2012		2011
	Current:
		Federal	$	76,481	$	69,092	$	47,799
		State		1,878		1,885		1,183
	Total		$	78,359	$	70,977	$	48,982
	Deferred
		Federal	$	-11,599	$	-3,131	$	-6,927
		State		-		-		245
	Total		$	-11,599	$	-3,131	$	-6,682
	Total expense
		Federal	$	64,882	$	65,961	$	40,872
		State		1,878		1,885		1,428
	Total		$	66,760	$	67,846	$	42,300
			2013		2012		2011
	Total expense (benefit):
		From continuing operations	$	66,757	$	67,866	$	42,366
		From discontinued operations		3		-20		-66
	Total		$	66,760	$	67,846	$	42,300
Schedule of deferred tax assets and liabilities	'
			31-Dec
			2013		2012
	Deferred tax assets:
		Allowance for credit losses	$	32,752	$	27,725
		Loan origination fees		11,580		8,991
		Stock compensation		10,786		5,777
		Mark to market on mortgage loans		220		245
		Reserve for potential mortgage loan repurchases		20		20
		Non-accrual interest		1,907		2,739
		Deferred lease expense		1,316		957
		OREO valuation allowance		499		3,168
		Other		1,157		1,452
		Total deferred tax assets		60,237		51,074
	Deferred tax liabilities:
		Loan origination costs		-1,048		-1,113
		Leases		-6,587		-9,077
		Depreciation		-1,183		-1,077
		Unrealized gain on securities		-877		-1,762
		Other		-1,819		-1,769
		Total deferred tax liabilities		-11,514		-14,798
	Net deferred tax asset		$	48,723	$	36,276
Schedule of effective income tax rate reconciliation	'
		Year ended December 31
		2013	2012	2011
	Tax at U.S. statutory rate	35%	35%	35%
	State taxes	1%	1%	1%
	Non-deductible expenses	1%	1%	1%
	Non-taxable income	-1%	-1%	-1%
	Total	36%	36%	36%

Employee_Benefits_Tables

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2013
Employee Benefits [Abstract]	'
Schedule of weighted-average assumptions	'
		2013	2012	2011
	Risk-free rate	1.17%	0.76%	1.83%
	Market price volatility factor	0.409	0.404	0.414
	Weighted-average expected life of options	5 years	5 years	5 years
Schedule of stock options activity	'
			31-Dec-13				31-Dec-12				31-Dec-11
			Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price		Options		Weighted Average Exercise Price
	Options outstanding at beginning of year			174,062	$	13.51		569,410	$	13.02		943,820	$	12.62
	Options exercised			-119,162		11.14		-391,348		12.74		-374,410		12
	Options forfeited			-		-		-4,000		19.37		-		-
	Options outstanding at year-end			54,900	$	18.65		174,062	$	13.51		569,410	$	13.02
	Options vested and exercisable at year-end			54,900	$	18.65		174,062	$	13.51		569,410	$	13.02
	Intrinsic value of options vested and exercisable		$	2,391,014			$	5,450,620			$	10,015,721
	Weighted average remaining contractual life of
		options vested and exercisable (in years)				0.97				1.15				2.06
	Intrinsic value of options exercised		$	4,176,787			$	10,246,387			$	5,496,861
	Weighted average remaining contractual life of
		options currently outstanding (in years)				0.97				1.15				2.06
Schedule of stock appreciation rights activity	'
			31-Dec-13				31-Dec-12				31-Dec-11
			SARs		Weighted Average Exercise Price		SARs / PSARs		Weighted Average Exercise Price		SARs / PSARs		Weighted Average Exercise Price
	SARs outstanding at beginning of year			640,220	$	20.9		983,700	$	19.56		1,213,257	$	19.42
	SARs granted			53,500		43.73		36,000		44.94		33,000		24.7
	SARs exercised			-134,271		19.21		-345,480		19.44		-236,610		19.86
	SARs forfeited			-22,300		18.99		-34,000		24.79		-25,947		16.56
	SARs outstanding at year-end			537,149	$	23.68		640,220	$	20.9		983,700	$	19.56
	SARs vested and exercisable at year-end			384,974	$	20.64		446,970	$	20.41		687,175	$	20.29
	Weighted average remaining contractual life of
		SARs vested				3.46				4.25				5.24
	Compensation expense		$	564,000			$	704,000			$	1,272,000
	Weighted average fair value of SARs granted
		during 2013, 2012 and 2011 (in years)			$	16.26			$	16.21			$	9.54
		Fair value of shares vested during the year	$	566,341			$	758,543			$	1,612,435
	Weighted average remaining contractual life of
		SARs currently outstanding (in years)				4.68				5.19				5.95
Schedule of restricted stock units activity	'
			Non-Vested Stock Awards Outstanding
			Number of Shares	Weighted-Average Grant-Date Fair Value
	Balance, January 1, 2011		897,351	$	14.64
		Granted	165,891		24.77
		Vested and issued	-364,065		16.07
		Forfeited	-37,685		18.7
	Balance, December 31, 2011		661,492		17.44
		Granted	105,000		39.89
		Vested and issued	-311,410		18.82
		Forfeited	-43,163		25.25
	Balance, December 31, 2012		411,919		23.8
		Granted	163,500		45.35
		Vested and issued	-151,480		20.47
		Forfeited	-20,200		24.96
	Balance, December 31, 2013		403,739	$	33.72

Financial_Instruments_with_Off1

Financial Instruments with Off-Balance Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2013
Financial Instruments with Off-Balance Sheet Risk [Abstract]	'
Schedule of financial instruments with off-balance sheet risk	'
		31-Dec
		2013		2012
	Commitments to extend credit	$	3,674,391	$	2,648,454
	Standby letters of credit		145,662		83,429

Regulatory_Restrictions_Tables

Regulatory Restrictions (Tables)	12 Months Ended
	Dec. 31, 2013
Regulatory Restrictions [Abstract]	'
Schedule of compliance with Regulatory Capital Requirements	'
				Actual			For Capital Adequacy Purposes			To Be Well Capitalized Under Prompt Corrective Action Provisions
	(Dollars in thousands)			Amount	Ratio		Amount	Ratio		Amount	Ratio
	As of December 31, 2013:
	Total capital (to risk-weighted assets):
		Company	$	1,387,312	10.73%	$	1,034,721	8.00%		N/A	N/A
		Bank		1,328,227	10.27%		1,034,406	8.00%	$	1,293,007	10.00%
	Tier 1 capital (to risk-weighted assets):
		Company	$	1,184,018	9.15%	$	517,361	4.00%		N/A	N/A
		Bank		975,933	7.55%		517,203	4.00%	$	775,804	6.00%
	Tier 1 capital (to average assets):
		Company	$	1,184,018	10.87%	$	435,750	4.00%		N/A	N/A
		Bank		975,933	8.96%		435,601	4.00%	$	544,502	5.00%
	As of December 31, 2012:
	Total capital (to risk-weighted assets):
		Company	$	1,112,924	9.97%	$	893,231	8.00%		N/A	N/A
		Bank		948,328	8.50%		892,806	8.00%	$	1,116,008	10.00%
	Tier 1 capital (to risk-weighted assets):
		Company	$	923,677	8.27%	$	446,616	4.00%		N/A	N/A
		Bank		800,081	7.17%		446,403	4.00%	$	669,605	6.00%
	Tier 1 capital (to average assets):
		Company	$	923,677	9.41%	$	392,649	4.00%		N/A	N/A
		Bank		800,081	8.16%		392,433	4.00%	$	490,541	5.00%

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of computation of basic and diluted earnings per share	'
				Year ended December
				2013		2012		2011
	Numerator:
		Net income from continuing operations		$	121,046	$	120,709	$	76,102
		Preferred stock dividends			7,394		-		-
		Net income from continuing operations available to common shareholders			113,652		120,709		76,102
		Gain (loss) from discontinued operations			5		-37		-126
		Net income		$	113,657	$	120,672	$	75,976
	Denominator:
		Denominator for basic earnings per share - weighted average shares			40,864,225		39,046,340		37,334,743
		Effect of employee stock-based awards(1)			402,593		645,771		682,694
		Effect of warrants to purchase common stock			513,063		473,736		315,640
		Denominator for dilutive earnings per share - adjusted weighted average
			shares and assumed conversions		41,779,881		40,165,847		38,333,077
	Basic earnings per common share from continuing operations			$	2.78	$	3.09	$	2.04
	Basic earnings per common share			$	2.78	$	3.09	$	2.03
	Diluted earnings per share from continuing operations			$	2.72	$	3.01	$	1.99
	Diluted earnings per common share			$	2.72	$	3	$	1.98

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities measured at fair value on a recurring and nonrecurring basis	'
	31-Dec-13			Fair Value Measurements Using
				Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Mortgage-backed securities	$	-	$	41,462	$	-
		Municipals		-		14,505		-
		Equity securities		-		7,247		-
	Loans(2) (4)			-		-		13,474
	OREO(3) (4)			-		-		5,110
	Derivative asset(5)			-		9,317		-
	Derivative liability(5)			-		-9,317		-
	31-Dec-12			Fair Value Measurements Using
				Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Mortgage-backed securities	$	-	$	61,581	$	-
		Corporate securities		-		5,080		-
		Municipals		-		25,894		-
		Equity securities		-		7,640		-
	Loans(2) (4)			-		-		11,639
	OREO(3) (4)			-		-		15,991
	Derivative asset(5)			-		28,473		-
	Derivative liability(5)			-		-28,473		-
Schedule of a summary of the carrying amounts and estimated fair values of financial instruments	'
			31-Dec-13					31-Dec-12
			Carrying		Estimated			Carrying		Estimated
			Amount		Fair Value			Amount		Fair Value
	Cash and cash equivalents	$	153,911	$	153,911		$	206,348	$	206,348
	Securities, available-for-sale		63,214		63,214			100,195		100,195
	Loans held for sale from discontinued operations		294		294			302		302
	Loans held for investment, net		11,182,970		11,179,145			9,886,470		9,889,303
	Derivative asset		9,317		9,317			28,473		28,473
	Deposits		9,257,379		9,257,574			7,440,804		7,441,240
	Federal funds purchased		148,650		148,650			273,179		273,179
	Other borrowings		876,980		861,981			1,673,982		1,673,983
	Subordinated notes		111,000		96,647			111,000		112,757
	Trust preferred subordinated debentures		113,406		113,406			113,406		113,406
	Derivative liability		9,317		9,317			28,473		28,473

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Schedule of minimum future lease payments under operating leases	'
	Year ending December 31,	Minimum Payments
	2014	$	13,483
	2015		14,136
	2016		14,085
	2017		14,038
	2018		13,960
	2019 and thereafter		62,335
		$	132,037

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations [Abstract]	'
Schedule of the results of operations of the discontinued components	'
		Year ended December 31
		2013		2012		2011
	Revenues	$	27	$	-26	$	58
	Expenses		19		31		250
	Income (loss) before income taxes		8		-57		-192
	Income tax expense (benefit)		3		-20		-66
	Income (loss) from discontinued operations	$	5	$	-37	$	-126

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative Financial Instruments [Abstract]	'
Schedule of notional amounts and estimated fair values of interest rate derivatives	'
			31-Dec-13				31-Dec-12
			Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
	Non-hedging interest rate derivative:
		Commercial loan/lease interest rate swaps	$	764,939	$	8,652	$	523,216	$	28,469
		Commercial loan/lease interest rate swaps		-764,939		-8,652		-523,216		-28,469
		Commercial loan/lease interest rate caps		-58,706		-665		-42,380		-4
		Commercial loan/lease interest rate caps		58,706		665		42,380		4
Schedule of the weighted-average receive and pay interest rate swaps	'
		31-Dec-13		31-Dec-12
		Weighted-Average Interest Rate		Weighted-Average Interest Rate
		Received	Paid	Received	Paid
	Non-hedging interest rate swaps	2.99%	4.89%	4.76%	3.11%

Quarterly_Financial_Data_Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]	'
Schedule of Quarterly Financial Information	'
			2013 Selected Quarterly Financial Data
			Fourth		Third		Second		First
	Interest income		$	117,965	$	115,217	$	107,264	$	104,179
	Interest expense			6,490		6,441		6,044		6,137
	Net interest income			111,475		108,776		101,220		98,042
	Provision for credit losses			5,000		5,000		7,000		2,000
	Net interest income after provision for credit losses			106,475		103,776		94,220		96,042
	Non-interest income			11,184		10,431		11,128		11,281
	Non-interest expense			70,291		62,009		68,734		55,700
	Income from continuing operations before income taxes			47,368		52,198		36,614		51,623
	Income tax expense			17,012		18,724		12,542		18,479
	Income from continuing operations			30,356		33,474		24,072		33,144
	Loss from discontinued operations (after-tax)			3		2		1		-1
	Net income			30,359		33,476		24,073		33,143
	Preferred stock dividends			2,438		2,437		2,438		81
	Net income available to common shareholders		$	27,921	$	31,039	$	21,635	$	33,062
	Basic earnings per share:
		Income from continuing operations	$	0.68	$	0.76	$	0.53	$	0.82
		Net income	$	0.68	$	0.76	$	0.53	$	0.82
	Diluted earnings per share:
		Income from continuing operations	$	0.67	$	0.74	$	0.52	$	0.8
		Net income	$	0.67	$	0.74	$	0.52	$	0.8
	Average shares
		Basic		40,983,000		40,902,000		40,814,000		40,474,000
		Diluted		41,889,000		41,792,000		41,724,000		41,429,000
	(In thousands except per share and average share data)		2012 Selected Quarterly Financial Data
			Fourth		Third		Second		First
	Interest income		$	107,769	$	102,011	$	95,546	$	93,131
	Interest expense			6,614		5,156		4,906		4,902
	Net interest income			101,155		96,855		90,640		88,229
	Provision for credit losses			4,500		3,000		1,000		3,000
	Net interest income after provision for credit losses			96,655		93,855		89,640		85,229
	Non-interest income			12,836		10,552		10,462		9,190
	Non-interest expense			60,074		53,521		53,973		52,276
	Income from continuing operations before income taxes			49,417		50,886		46,129		42,143
	Income tax expense			17,982		18,316		16,506		15,062
	Income from continuing operations			31,435		32,570		29,623		27,081
	Loss from discontinued operations (after-tax)			-6		-34		-1		4
	Net income		$	31,429	$	32,536	$	29,622	$	27,085
	Basic earnings per share:
		Income from continuing operations	$	0.78	$	0.82	$	0.78	$	0.72
		Net income	$	0.78	$	0.82	$	0.78	$	0.72
	Diluted earnings per share:
		Income from continuing operations	$	0.76	$	0.8	$	0.76	$	0.7
		Net income	$	0.76	$	0.8	$	0.76	$	0.7
	Average shares
		Basic		40,446,000		39,618,000		38,013,000		37,795,000
		Diluted		41,505,000		40,756,000		39,142,000		38,914,000

Securities_Details

Securities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Summary of Available-for-Sale Securities	'	'
Amortized Cost	$60,709	$95,161
Gross Unrealized Gains	2,780	5,034
Gross Unrealized Losses	-275	0
Estimated Fair Value	63,214	100,195
Residential mortgage-backed securities	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	38,786	57,342
Gross Unrealized Gains	2,676	4,239
Gross Unrealized Losses	0	0
Estimated Fair Value	41,462	61,581
Corporate securities	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	'	5,000
Gross Unrealized Gains	'	80
Gross Unrealized Losses	'	0
Estimated Fair Value	'	5,080
Municipals	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	14,401	25,300
Gross Unrealized Gains	104	594
Gross Unrealized Losses	0	0
Estimated Fair Value	14,505	25,894
Equity securities	'	'
Summary of Available-for-Sale Securities	'	'
Amortized Cost	7,522	7,519
Gross Unrealized Gains	0	121
Gross Unrealized Losses	-275	0
Estimated Fair Value	$7,247	$7,640

Securities_Details_1

Securities (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
The amortized cost and fair value of available-for-sale securites by maturity	'	'	'
Amortized cost, Total	$60,709,000	$95,161,000	'
Estimated Fair Value	63,214,000	100,195,000	'
Available-for-sale Securities, Other Disclosure Items	'	'	'
Available-for-sale Securities, Average Expected Life	'1 year 5 months	'1 year 7 months	'
Federal Tax Rate	35.00%	35.00%	35.00%
Available-for-sale Securities Pledged as Collateral	45,993,000	45,449,000	'
Residential mortgage-backed securities	'	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'	'
Amortized cost, Less Than One Year	238,000	656,000	'
Amortized cost, After One Through Five Years	14,720,000	5,698,000	'
Amortized cost, After Five Through Ten Years	7,718,000	23,111,000	'
Amortized cost, After Ten Years	16,110,000	27,877,000	'
Amortized cost, Total	38,786,000	57,342,000	'
Estimated fair value, Less Than One Year	252,000	690,000	'
Estimated fair value, After One Through Five Years	15,641,000	6,113,000	'
Estimated fair value, After Five Through Ten Years	8,456,000	24,948,000	'
Estimated fair value, After Ten Years	17,113,000	29,830,000	'
Estimated Fair Value	41,462,000	61,581,000	'
Weighted average yield, Less Than One Year	4.32%	4.20%	'
Weighted average yield, After One Through Five Years	4.78%	5.29%	'
Weighted average yield, After Five Through Ten Years	5.56%	4.86%	'
Weighted average yield, After Ten Years	2.40%	3.41%	'
Weighted average yield, Total	3.94%	4.19%	'
Corporate securities	'	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'	'
Amortized cost, Less Than One Year	'	0	'
Amortized cost, After One Through Five Years	'	5,000,000	'
Amortized cost, After Five Through Ten Years	'	0	'
Amortized cost, After Ten Years	'	0	'
Amortized cost, Total	'	5,000,000	'
Estimated fair value, Less Than One Year	'	0	'
Estimated fair value, After One Through Five Years	'	5,080,000	'
Estimated fair value, After Five Through Ten Years	'	0	'
Estimated fair value, After Ten Years	'	0	'
Estimated Fair Value	'	5,080,000	'
Weighted average yield, Less Than One Year	'	0.00%	'
Weighted average yield, After One Through Five Years	'	7.38%	'
Weighted average yield, After Five Through Ten Years	'	0.00%	'
Weighted average yield, After Ten Years	'	0.00%	'
Weighted average yield, Total	'	7.38%	'
Municipals	'	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'	'
Amortized cost, Less Than One Year	7,749,000	6,575,000	'
Amortized cost, After One Through Five Years	6,652,000	16,448,000	'
Amortized cost, After Five Through Ten Years	0	2,277,000	'
Amortized cost, After Ten Years	0	0	'
Amortized cost, Total	14,401,000	25,300,000	'
Estimated fair value, Less Than One Year	7,818,000	6,646,000	'
Estimated fair value, After One Through Five Years	6,687,000	16,895,000	'
Estimated fair value, After Five Through Ten Years	0	2,353,000	'
Estimated fair value, After Ten Years	0	0	'
Estimated Fair Value	14,505,000	25,894,000	'
Weighted average yield, Less Than One Year	5.76%	5.75%	'
Weighted average yield, After One Through Five Years	5.71%	5.66%	'
Weighted average yield, After Five Through Ten Years	0.00%	6.01%	'
Weighted average yield, After Ten Years	0.00%	0.00%	'
Weighted average yield, Total	5.73%	5.72%	'
Equity securities	'	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'	'
Amortized cost, Less Than One Year	7,522,000	7,519,000	'
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	'
Amortized cost, Total	7,522,000	7,519,000	'
Estimated fair value, Less Than One Year	7,247,000	7,640,000	'
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	'
Estimated Fair Value	7,247,000	7,640,000	'
Deposits	'	'	'
Available-for-sale Securities, Other Disclosure Items	'	'	'
Available-for-sale Securities Pledged as Collateral	$8,273,000	$21,500,000	'

Securities_Details_2

Securities (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Available-for-sale Securities, Continuous Unrealized Loss Position	'	'	'
Fair Value, Less Than 12 Months	$7,247	'	'
Unrealized Loss, Less Than 12 Months	-275	'	'
Fair Value, 12 Months or Longer	0	'	'
Unrealized Loss, 12 Months or Longer	0	'	'
Fair Value, Total	7,247	'	'
Unrealized Loss, Total	-275	'	'
Comprehensive income	119,407	119,222	75,343
Change in unrealized gain on available-for-sale securities, net of taxes of $341,$781,$885 in year 2011, 2012 and 2013 respectively (unaudited)	($1,644)	($1,450)	($633)

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Loans and Leases Receivable, Net Reported Amount	'	'	'
Commercial	$5,020,565	$4,106,419	'
Mortgage Finance	2,784,265	3,175,272	'
Construction	1,262,905	737,637	'
Real Estate	2,146,228	1,892,451	'
Consumer	15,350	19,493	'
Leases	93,160	69,470	'
Gross loans held for investment	11,322,473	10,000,742	'
Deferred inocme (net of origination costs)	-51,899	-39,935	'
Allowance for loan losses	-87,604	-74,337	-70,295
Loans held for investment, net	11,182,970	9,886,470	'
Total	$11,182,970	$9,886,470	'

Loans_and_Allowances_for_Credi

Loans and Allowances for Credit Losses - Credit Risk Profile (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	$5,020,565	$4,106,419
Mortgage Finance	2,784,265	3,175,272
Construction	1,262,905	737,637
Real Estate	2,146,228	1,892,451
Consumer	15,350	19,493
Leases	93,160	69,470
Total	11,322,473	10,000,742
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	4,908,944	4,013,538
Mortgage Finance	2,784,265	3,175,272
Construction	1,261,995	703,673
Real Estate	2,099,450	1,816,027
Consumer	15,251	19,436
Leases	89,317	68,327
Total	11,159,222	9,796,273
Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	24,132	33,137
Mortgage Finance	0	0
Construction	102	11,957
Real Estate	6,338	12,461
Consumer	0	0
Leases	51	919
Total	30,623	58,474
Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	74,593	44,371
Mortgage Finance	0	0
Construction	103	4,790
Real Estate	21,770	40,897
Consumer	45	0
Leases	3,742	104
Total	100,253	90,162
Non-accrual [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Commercial	12,896	15,373
Mortgage Finance	0	0
Construction	705	17,217
Real Estate	18,670	23,066
Consumer	54	57
Leases	50	120
Total	$32,375	$55,833

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	$74,337,000	$70,295,000	'
Provision for possible loan losses	18,165,000	10,107,000	'
Loans charged-off	-6,766,000	-7,860,000	'
Recoveries	1,868,000	1,795,000	'
Net charge-offs	4,898,000	6,065,000	'
Ending balance	87,604,000	74,337,000	70,295,000
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	3,174,000	3,930,000	'
Loans collectively evaluated for impairment	84,430,000	70,407,000	'
Interest Income Recognized	2,400,000	2,600,000	2,200,000
Additional interest income lost on non-accrual loans	2,500,000	2,400,000	5,900,000
Nonaccrual loans earning on a cash basis	17,800,000	'	'
Commercial	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	21,547,000	17,337,000	'
Provision for possible loan losses	23,693,000	10,086,000	'
Loans charged-off	-6,575,000	-6,708,000	'
Recoveries	1,203,000	832,000	'
Net charge-offs	5,372,000	5,876,000	'
Ending balance	39,868,000	21,547,000	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	2,015,000	2,983,000	'
Loans collectively evaluated for impairment	37,853,000	18,564,000	'
Mortgage Finance	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	0	0	'
Provision for possible loan losses	0	0	'
Loans charged-off	0	0	'
Recoveries	0	0	'
Net charge-offs	0	0	'
Ending balance	0	0	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	0	0	'
Loans collectively evaluated for impairment	0	0	'
Construction	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	12,097,000	7,845,000	'
Provision for possible loan losses	2,456,000	4,242,000	'
Loans charged-off	0	0	'
Recoveries	0	10,000	'
Net charge-offs	0	-10,000	'
Ending balance	14,553,000	12,097,000	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	0	14,000	'
Loans collectively evaluated for impairment	14,553,000	12,083,000	'
Real Estate	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	30,893,000	33,721,000	'
Provision for possible loan losses	-6,809,000	-2,741,000	'
Loans charged-off	-144,000	-899,000	'
Recoveries	270,000	812,000	'
Net charge-offs	-126,000	87,000	'
Ending balance	24,210,000	30,893,000	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	1,143,000	899,000	'
Loans collectively evaluated for impairment	23,067,000	29,994,000	'
Consumer	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	226,000	223,000	'
Provision for possible loan losses	-105,000	19,000	'
Loans charged-off	-45,000	-49,000	'
Recoveries	73,000	33,000	'
Net charge-offs	-28,000	16,000	'
Ending balance	149,000	226,000	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	8,000	16,000	'
Loans collectively evaluated for impairment	141,000	210,000	'
Leases	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	2,460,000	2,356,000	'
Provision for possible loan losses	325,000	200,000	'
Loans charged-off	-2,000	-204,000	'
Recoveries	322,000	108,000	'
Net charge-offs	-320,000	96,000	'
Ending balance	3,105,000	2,460,000	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	8,000	18,000	'
Loans collectively evaluated for impairment	3,097,000	2,442,000	'
Unallocated	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Beginning balance	7,114,000	8,813,000	'
Provision for possible loan losses	-1,395,000	-1,699,000	'
Loans charged-off	0	0	'
Recoveries	0	0	'
Net charge-offs	0	0	'
Ending balance	5,719,000	7,114,000	'
Period end amount allocated to:	'	'	'
Loans individually evaluated for impairment	0	0	'
Loans collectively evaluated for impairment	$5,719,000	$7,114,000	'

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	$39,976	$66,241
Loans collectively evaluated for impairment	11,282,497	9,934,501
Commercial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	15,140	15,373
Loans collectively evaluated for impairment	5,005,425	4,091,046
Mortgage Finance	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	2,784,265	3,175,272
Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	705	18,179
Loans collectively evaluated for impairment	1,262,200	719,458
Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	24,027	32,512
Loans collectively evaluated for impairment	2,122,201	1,859,939
Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	54	57
Loans collectively evaluated for impairment	15,296	19,436
Leases	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans individually evaluated for impairment	50	120
Loans collectively evaluated for impairment	$93,110	$69,350

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loan and Lease Receivables, Impaired [Abstract]	'	'	'
Interest income recognized on non-accrual loans	$2,400,000	$2,600,000	$2,200,000
Additional interest income lost on non-accrual loans	2,500,000	2,400,000	5,900,000
Nonaccrual loans earning on a cash basis	17,800,000	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	32,375,000	'	'
Commercial | Business loans	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	12,896,000	'	'
Commercial | Energy	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	0	'	'
Construction | Market risk	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	705,000	'	'
Real estate | Market risk	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	15,607,000	'	'
Real estate | Commercial	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	508,000	'	'
Real estate | Secured by 1-4 family	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	2,555,000	'	'
Consumer	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	54,000	'	'
Leases	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Total non-accrual loans	$50,000	'	'

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses (Details 4) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]	'	'	'
Interest Income Recognized	$2,400	$2,600	$2,200
Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Related Allowance	'	0	'
Construction	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Unpaid Principal Balance	'	0	'
Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Unpaid Principal Balance	'	57	'
With no related allowance recorded	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	19,676	38,452	'
Unpaid Principal Balance	21,505	38,452	'
Related Allowance	0	0	'
Average Recorded Investment	26,063	36,202	'
Interest Income Recognized	114	677	'
With no related allowance recorded | Commercial | Business loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	2,005	2,938	'
Unpaid Principal Balance	2,005	2,938	'
Related Allowance	0	0	'
Average Recorded Investment	4,265	1,409	'
Interest Income Recognized	0	0	'
With no related allowance recorded | Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	1,614	'	'
Unpaid Principal Balance	3,443	'	'
Related Allowance	0	'	'
Average Recorded Investment	969	'	'
Interest Income Recognized	0	'	'
With no related allowance recorded | Construction | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	705	17,217	'
Unpaid Principal Balance	705	17,217	'
Related Allowance	0	0	'
Average Recorded Investment	3,111	18,571	'
Interest Income Recognized	114	677	'
With no related allowance recorded | Real estate | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	13,524	9,061	'
Unpaid Principal Balance	13,524	9,061	'
Related Allowance	0	0	'
Average Recorded Investment	9,796	7,944	'
Interest Income Recognized	0	0	'
With no related allowance recorded | Real estate | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	508	6,604	'
Unpaid Principal Balance	508	6,604	'
Related Allowance	0	0	'
Average Recorded Investment	5,458	6,451	'
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	2,632	'
Unpaid Principal Balance	1,320	2,632	'
Related Allowance	0	'	'
Average Recorded Investment	2,464	1,827	'
Interest Income Recognized	0	0	'
With no related allowance recorded | Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	0	'
Unpaid Principal Balance	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	20,300	27,789	'
Unpaid Principal Balance	21,665	33,745	'
Related Allowance	3,174	3,930	'
Average Recorded Investment	24,731	30,160	'
Interest Income Recognized	0	0	'
With an allowance recorded | Commercial | Business loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	11,060	12,435	'
Unpaid Principal Balance	12,425	18,391	'
Related Allowance	1,946	2,983	'
Average Recorded Investment	14,240	15,484	'
Interest Income Recognized	0	0	'
With an allowance recorded | Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	460	'	'
Unpaid Principal Balance	460	'	'
Related Allowance	69	'	'
Average Recorded Investment	913	'	'
Interest Income Recognized	0	'	'
With an allowance recorded | Construction | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	962	'
Unpaid Principal Balance	0	962	'
Related Allowance	0	14	'
Average Recorded Investment	160	321	'
Interest Income Recognized	0	0	'
With an allowance recorded | Real estate | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	6,289	11,439	'
Unpaid Principal Balance	6,289	11,439	'
Related Allowance	822	535	'
Average Recorded Investment	7,912	11,811	'
Interest Income Recognized	0	0	'
With an allowance recorded | Real estate | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	0	2,013	'
Unpaid Principal Balance	0	2,013	'
Related Allowance	0	89	'
Average Recorded Investment	477	671	'
Interest Income Recognized	0	0	'
With an allowance recorded | Real estate | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	2,387	763	'
Unpaid Principal Balance	2,387	763	'
Related Allowance	321	275	'
Average Recorded Investment	914	1,632	'
Interest Income Recognized	0	0	'
With an allowance recorded | Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	54	57	'
Unpaid Principal Balance	54	'	'
Related Allowance	8	16	'
Average Recorded Investment	43	59	'
Interest Income Recognized	0	0	'
With an allowance recorded | Leases	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	50	120	'
Unpaid Principal Balance	50	120	'
Related Allowance	8	18	'
Average Recorded Investment	72	182	'
Interest Income Recognized	0	0	'
Combined	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	39,976	66,241	'
Unpaid Principal Balance	43,170	72,197	'
Related Allowance	3,174	3,930	'
Average Recorded Investment	50,794	66,362	'
Interest Income Recognized	114	677	'
Combined | Commercial | Business loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	13,065	15,373	'
Unpaid Principal Balance	14,430	21,329	'
Related Allowance	1,946	2,983	'
Average Recorded Investment	18,505	16,893	'
Interest Income Recognized	0	0	'
Combined | Commercial | Energy	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	2,074	'	'
Unpaid Principal Balance	3,903	'	'
Related Allowance	69	'	'
Average Recorded Investment	1,882	'	'
Interest Income Recognized	0	'	'
Combined | Construction | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	705	18,179	'
Unpaid Principal Balance	705	18,179	'
Related Allowance	0	14	'
Average Recorded Investment	3,271	18,892	'
Interest Income Recognized	114	677	'
Combined | Real estate | Market risk	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	19,813	20,500	'
Unpaid Principal Balance	19,813	20,500	'
Related Allowance	822	535	'
Average Recorded Investment	17,708	19,755	'
Interest Income Recognized	0	0	'
Combined | Real estate | Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	508	8,617	'
Unpaid Principal Balance	508	8,617	'
Related Allowance	0	89	'
Average Recorded Investment	5,935	7,122	'
Interest Income Recognized	0	0	'
Combined | Real estate | Secured by 1-4 family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	3,707	3,395	'
Unpaid Principal Balance	3,707	3,395	'
Related Allowance	321	275	'
Average Recorded Investment	3,378	3,459	'
Interest Income Recognized	0	0	'
Combined | Consumer	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	54	57	'
Unpaid Principal Balance	54	'	'
Related Allowance	8	16	'
Average Recorded Investment	43	59	'
Interest Income Recognized	0	0	'
Combined | Leases	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Recorded Investment	50	120	'
Unpaid Principal Balance	50	120	'
Related Allowance	8	18	'
Average Recorded Investment	72	182	'
Interest Income Recognized	$0	$0	'

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses (Details 5) (USD $)	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	$59,056,000
60-89 Days Past Due	12,318,000
Greater Than 90 Days	9,325,000
Total Past Due	80,699,000
Current	11,209,399,000
Total loans held for investment	11,290,098,000
Greater Than 90 Days and Accruing, premium finance loans	3,800,000
Commercial | Business loans	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	29,946,000
60-89 Days Past Due	7,683,000
Greater Than 90 Days	7,528,000
Total Past Due	45,157,000
Current	4,027,409,000
Total loans held for investment	4,072,566,000
Commercial | Energy	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	5,239,000
60-89 Days Past Due	1,092,000
Greater Than 90 Days	0
Total Past Due	6,331,000
Current	928,772,000
Total loans held for investment	935,103,000
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
Total Past Due	0
Current	2,784,265,000
Total loans held for investment	2,784,265,000
Construction | Market risk	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	1,000
60-89 Days Past Due	0
Greater Than 90 Days	103,000
Total Past Due	104,000
Current	1,245,388,000
Total loans held for investment	1,245,492,000
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
Greater Than 90 Days	0
Total Past Due	0
Current	16,708,000
Total loans held for investment	16,708,000
Real estate | Market risk	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	6,013,000
60-89 Days Past Due	3,100,000
Greater Than 90 Days	0
Total Past Due	9,113,000
Current	1,623,706,000
Total loans held for investment	1,632,819,000
Real estate | Commercial	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	15,024,000
60-89 Days Past Due	0
Greater Than 90 Days	0
Total Past Due	15,024,000
Current	387,856,000
Total loans held for investment	402,880,000
Real estate | Secured by 1-4 family	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	2,607,000
60-89 Days Past Due	266,000
Greater Than 90 Days	1,694,000
Total Past Due	4,567,000
Current	87,292,000
Total loans held for investment	91,859,000
Consumer	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	37,000
60-89 Days Past Due	177,000
Greater Than 90 Days	0
Total Past Due	214,000
Current	15,082,000
Total loans held for investment	15,296,000
Leases	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	189,000
60-89 Days Past Due	0
Greater Than 90 Days	0
Total Past Due	189,000
Current	92,921,000
Total loans held for investment	$93,110,000

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	number	number
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	4	6
Pre-Restructuring Outstanding Recorded Investment	$11,715,000	$10,290,000
Post-Restructuring Outstanding Recorded Investment	9,795,000	9,643,000
Loans considered restructured that are not already on nonaccrual	1,900,000	'
Nonaccrual loans that met the criteria for restructured	17,800,000	'
Decrease in post-restructuring recorded investment	1,900,000	'
Charge-offs	1,400,000	'
Paydowns	554,000	'
Loans restructured on non-accrual	8,100,000	'
Commercial Loan [Member] | Business loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	3	3
Pre-Restructuring Outstanding Recorded Investment	10,823,000	7,140,000
Post-Restructuring Outstanding Recorded Investment	8,921,000	7,103,000
Real estate | Market risk	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	2
Pre-Restructuring Outstanding Recorded Investment	892,000	1,726,000
Post-Restructuring Outstanding Recorded Investment	874,000	1,147,000
Real estate | Secured by 1-4 family	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	1
Pre-Restructuring Outstanding Recorded Investment	'	1,424,000
Post-Restructuring Outstanding Recorded Investment	'	$1,393,000

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses - TDR Summary (Details 7) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	$9,795	$9,643
Extended maturity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	874	1,913
Adjusted interest rates [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	0	1,393
Combination of rate and maturity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	$8,921	$6,337

OREO_and_Valuation_Allowance_f2

OREO and Valuation Allowance for Losses on OREO (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OREO and Valuation Allowance for Losses on OREO [Abstract]	'	'	'
Beginning balance	$15,991	$34,077	$42,261
Additions	1,331	3,434	22,180
Sales	-11,292	-14,637	-23,566
Valuation allowance for OREO	-958	4,488	3,922
Real Estate Acquired Through Foreclosure Direct Write Offs	1,878	2,395	2,876
Ending balance	$5,110	$15,991	$34,077

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) (USD $)	12 Months Ended					1 Months Ended			12 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	31-May-13	Jun. 30, 2011	31-May-13	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2013	31-May-13	31-May-13
						Customer relashionships	Customer relashionships	Trade name	Trade name	Trade name	Developed Technology Rights
Business Acquisition, Purchase Price Allocation	'	'	'	'	'	'	'	'	'	'	'
Business Acquisition, Purchase Price Allocation, Total Intangible Assets	'	'	'	$2,100,000	$11,500,000	$554,000	'	'	'	$98,000	$457,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount	'	'	'	954,000	7,200,000	'	'	'	'	'	'
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	'	'	'	'	'	55,400	4,100,000	181,000	'	98,000	457,000
Finite-Lived Intangible Assets, Useful Life	'	'	'	'	'	'14 years	'18 years	'18 years	'5 years	'	'7 years
Summary of Goodwill and Other Intangible Assets	'	'	'	'	'	'	'	'	'	'	'
Goodwill, Gross	15,370,000	14,416,000	'	'	'	'	'	'	'	'	'
Goodwill, Accumulated Impairment	-374,000	-374,000	'	'	'	'	'	'	'	'	'
Goodwill, Net	14,996,000	14,042,000	'	'	'	'	'	'	'	'	'
Intangible Assets, Gross	9,104,000	7,996,000	'	'	'	'	'	'	'	'	'
Intangible Assets, Accumulated Amortization	-2,814,000	-2,155,000	'	'	'	'	'	'	'	'	'
Intangible Assets, Net	6,290,000	5,841,000	'	'	'	'	'	'	'	'	'
Gross Goodwill and Intangible Assets	24,474,000	22,412,000	'	'	'	'	'	'	'	'	'
Accumulated Amortization	-3,188,000	-2,529,000	'	'	'	'	'	'	'	'	'
Net Goodwill and Intangible Assets	21,286,000	19,883,000	'	'	'	'	'	'	'	'	'
Amortization Expense, Intangible Assets	660,000	597,000	485,000	'	'	'	'	'	'	'	'
Aggregate estimated future amortization expense for intangible assets	'	'	'	'	'	'	'	'	'	'	'
2012	699,000	'	'	'	'	'	'	'	'	'	'
2013	598,000	'	'	'	'	'	'	'	'	'	'
2014	501,000	'	'	'	'	'	'	'	'	'	'
2015	473,000	'	'	'	'	'	'	'	'	'	'
2016	473,000	'	'	'	'	'	'	'	'	'	'
Thereafter	3,546,000	'	'	'	'	'	'	'	'	'	'
Total	$6,290,000	$5,841,000	'	'	'	'	'	'	'	'	'

Premises_and_Equipment_Details

Premises and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of premises and equipment	'	'	'
Premises and equipment, gross	$42,978,000	$39,428,000	'
Accumulated depreciation	-31,496,000	-27,983,000	'
Total premises and equipment, net	11,482,000	11,445,000	'
Depreciation, Depletion and Amortization	'	'	'
Depreciation expense	3,992,000	3,550,000	3,397,000
Premises	'	'	'
Summary of premises and equipment	'	'	'
Premises and equipment, gross	14,113,000	12,950,000	'
Furniture and equipment	'	'	'
Summary of premises and equipment	'	'	'
Premises and equipment, gross	$28,865,000	$26,478,000	'

Deposits_Summary_Details

Deposits Summary (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Summary of deposits	'	'
Non-interest bearing	$3,347,567	$2,535,375
Transaction deposits	792,186	979,642
Savings deposits	4,414,680	3,170,401
Time Deposits	372,639	426,077
Interest bearing in foreign branches	330,307	329,309
Total Interest-bearing Deposits	5,909,812	4,905,429
Total deposits	$9,257,379	$7,440,804

Deposits_Details

Deposits (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Scheduled maturities of interest bearing time deposits	'	'
2012	$343,654,000	'
2013	25,599,000	'
2014	1,105,000	'
2015	2,041,000	'
2016	167,000	'
2017 and after	73,000	'
Time deposits, total	372,639,000	'
Time Deposits From Related Parties	27,139,000	30,310,000
Time Deposits, $100,000 or More	$652,350,000	$719,815,000

Borrowing_Arrangements_Details

Borrowing Arrangements (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]	'	'	'
Total borrowings	$1,250,036,000	$2,171,567,000	$1,881,522,000
Maximum outstanding at any month end	1,859,036,000	2,432,945,000	1,986,324,000
Federal funds purchased	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	148,650,000	273,179,000	412,249,000
Interest rate as of period end	0.22%	0.26%	0.27%
Debt, Weighted Average Interest Rate	0.27%	0.28%	0.25%
Average balance for the year	254,300,000	350,800,000	238,500,000
Customer repurchase agreements	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	21,954,000	23,936,000	23,801,000
Interest rate as of period end	0.31%	0.04%	0.06%
Customer repurchase agreements | Collaterized securities	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	37,700,000	23,900,000	28,300,000
FHLB borrowings	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	840,026,000	1,650,046,000	1,200,066,000
Interest rate as of period end	0.12%	0.09%	0.14%
Debt, Weighted Average Interest Rate	0.14%	0.16%	0.11%
Average balance for the year	370,000,000	1,200,000,000	462,500,000
Line of credit	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	15,000,000	0	0
Interest rate as of period end	2.65%	0.00%	0.00%
Fed borrowings	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	0	0	132,000,000
Interest rate as of period end	0.00%	0.00%	0.75%
Subordinated notes	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	111,000,000	111,000,000	0
Interest rate as of period end	6.50%	6.50%	0.00%
Trust preferred subordinated debentures	'	'	'
Debt Instrument [Line Items]	'	'	'
Total borrowings	$113,406,000	$113,406,000	$113,406,000
Interest rate as of period end	2.17%	2.24%	2.48%

Borrowing_Arrangements_Details1

Borrowing Arrangements (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of other borrowing capacities	'	'	'
Total FHLB borrowing capacity	$701,784,000	$300,746,000	$20,433,000
Unused federal funds lines available from commercial banks	890,000,000	706,000,000	390,720,000
Borrowed Funds, by Maturity	'	'	'
Within One Year	1,025,604,000	'	'
After One But Within Three Years	26,000	'	'
After Three But Within Five Years	0	'	'
After Five Years	224,406,000	'	'
Total borrowings	1,250,036,000	2,171,567,000	1,881,522,000
Line of Credit Facility, Remaining Borrowing Capacity	15,000,000	'	'
Line of Credit Facility, Maximum Borrowing Capacity	100,000,000	'	'
Line of Credit Facility, Expiration Date	15-Dec-14	'	'
Federal funds purchased	'	'	'
Borrowed Funds, by Maturity	'	'	'
Within One Year	148,650,000	'	'
After One But Within Three Years	0	'	'
After Three But Within Five Years	0	'	'
After Five Years	0	'	'
Total borrowings	148,650,000	273,179,000	412,249,000
Customer repurchase agreements	'	'	'
Borrowed Funds, by Maturity	'	'	'
Within One Year	21,954,000	'	'
After One But Within Three Years	0	'	'
After Three But Within Five Years	0	'	'
After Five Years	0	'	'
Total borrowings	21,954,000	23,936,000	23,801,000
FHLB borrowings	'	'	'
Borrowed Funds, by Maturity	'	'	'
Within One Year	840,000,000	'	'
After One But Within Three Years	26,000	'	'
After Three But Within Five Years	0	'	'
After Five Years	0	'	'
Total borrowings	840,026,000	'	'
Line of credit	'	'	'
Borrowed Funds, by Maturity	'	'	'
Within One Year	15,000,000	'	'
After One But Within Three Years	0	'	'
After Three But Within Five Years	0	'	'
After Five Years	0	'	'
Total borrowings	15,000,000	0	0
Subordinated notes	'	'	'
Borrowed Funds, by Maturity	'	'	'
Within One Year	0	'	'
After One But Within Three Years	0	'	'
After Three But Within Five Years	0	'	'
After Five Years	111,000,000	'	'
Total borrowings	111,000,000	111,000,000	0
Trust preferred subordinated debentures	'	'	'
Borrowed Funds, by Maturity	'	'	'
Within One Year	0	'	'
After One But Within Three Years	0	'	'
After Three But Within Five Years	0	'	'
After Five Years	113,406,000	'	'
Total borrowings	113,406,000	113,406,000	113,406,000
Loans	'	'	'
Summary of other borrowing capacities	'	'	'
Total FHLB borrowing capacity	693,302,000	267,542,000	4,524,000
Unused federal funds lines available from commercial banks	'	35,000,000	'
Securities	'	'	'
Summary of other borrowing capacities	'	'	'
Total FHLB borrowing capacity	$8,482,000	$33,204,000	$15,909,000

Long_Term_Debt_Details

Long Term Debt (Details) (USD $)	1 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Sep. 21, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
					Texas Capital Bancshares Statutory I	Texas Capital Bancshares Statutory II	Texas Capital Bancshares Statutory III	Texas Capital Bancshares Statutory IV	Texas Capital Bancshares Statutory V	Trust Preferred Subordinated Debentures
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]	'	'	'	'	'	'	'	'	'	'
Total borrowings	'	$1,250,036	$2,171,567	$1,881,522	'	'	'	'	'	$113,400
Date issued	'	'	'	'	19-Nov-02	10-Apr-03	6-Oct-05	28-Apr-08	29-Sep-06	'
Capital securities issued	$111,000	$113,406	$113,406	'	$10	$10	$26	$26	$41	'
Floating or fixed rate securities	'	'	'	'	'Floating	'Floating	'Floating	'Floating	'Floating	'
Interest rate on subordinated debentures, description	'	'	'	'	'3 month LIBOR + 3.35%	'3 month LIBOR + 3.25%	'3 month LIBOR + 1.51%	'3 month LIBOR + 1.60%	'3 month LIBOR + 1.71%	'
Interest rate on subordinated debentures, spread on variable rate	'	'	'	'	3.35%	3.25%	1.51%	1.60%	1.71%	'
Maturity Date	30-Sep-42	'	'	'	30-Nov-32	30-Apr-33	31-Dec-35	30-Jun-36	31-Dec-36	'
Interest Rate, Stated Percentage	6.50%	'	'	'	'	'	'	'	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'	'	'
Deferred Tax Assets, Gross	$60,200,000	$51,100,000	'
Current:	'	'	'
Federal	76,481,000	69,092,000	47,799,000
State	1,878,000	1,885,000	1,183,000
Total	78,359,000	70,977,000	48,982,000
Deferred:	'	'	'
Federal	-11,599,000	-3,131,000	-6,927,000
State	0	0	245,000
Total	-11,599,000	-3,131,000	-6,682,000
Total expense:	'	'	'
Federal	64,882,000	65,961,000	40,872,000
State	1,878,000	1,885,000	1,428,000
Total	$66,760,000	$67,846,000	$42,300,000

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	3 Months Ended							6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income tax expense for continuing and discontinued operations	'	'	'	'	'	'	'	'	'	'	'
From continuing operations	$17,012	$18,724	$12,542	$18,479	$17,982	$18,316	$16,506	$15,062	$66,757	$67,866	$42,366
From discontinued operations	'	'	'	'	'	'	'	'	3	-20	-66
Total	'	'	'	'	'	'	'	'	66,760	67,846	42,300
Deferred tax assets:	'	'	'	'	'	'	'	'	'	'	'
Allowance for credit losses	32,752	'	'	'	27,725	'	'	'	32,752	27,725	'
Organizational costs/intangibles	0	'	'	'	0	'	'	'	0	0	'
Loan origination fees	11,580	'	'	'	8,991	'	'	'	11,580	8,991	'
Stock compensation	10,786	'	'	'	5,777	'	'	'	10,786	5,777	'
Mark to market on mortgage loans	220	'	'	'	245	'	'	'	220	245	'
Reserve for potential mortgage loan repurchases	20	'	'	'	20	'	'	'	20	20	'
Non-accrual interest	1,907	'	'	'	2,739	'	'	'	1,907	2,739	'
Deferred lease expense	1,316	'	'	'	957	'	'	'	1,316	957	'
OREO valuation allowance	499	'	'	'	3,168	'	'	'	499	3,168	'
Other	1,157	'	'	'	1,452	'	'	'	1,157	1,452	'
Deferred tax assets, total	60,237	'	'	'	51,074	'	'	'	60,237	51,074	'
Deferred tax liabilities:	'	'	'	'	'	'	'	'	'	'	'
Loan origination costs	1,048	'	'	'	1,113	'	'	'	1,048	1,113	'
Leases	6,587	'	'	'	9,077	'	'	'	6,587	9,077	'
Depreciation	1,183	'	'	'	1,077	'	'	'	1,183	1,077	'
Unrealized gain on securities	877	'	'	'	1,762	'	'	'	877	1,762	'
Other	1,819	'	'	'	1,769	'	'	'	1,819	1,769	'
Deferred tax liabilities, total	11,514	'	'	'	14,798	'	'	'	11,514	14,798	'
Net deferred tax asset	$48,723	'	'	'	$36,276	'	'	'	$48,723	$36,276	'
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Tax at R.S. statutory rate	'	'	'	'	'	'	'	'	35.00%	35.00%	35.00%
State taxes	'	'	'	'	'	'	'	'	1.00%	1.00%	1.00%
Non-deductible expenses	'	'	'	'	'	'	'	'	1.00%	1.00%	1.00%
Non-taxable income	'	'	'	'	'	'	'	'	-1.00%	-1.00%	-1.00%
Total	'	'	'	'	'	'	'	'	36.00%	36.00%	36.00%

Employee_Benefits_Details

Employee Benefits (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'
Deferred Compensation Arrangement with Individual, Employer Contribution	$3,700,000	$2,700,000	$819,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'	'
Risk-free rate	1.17%	0.76%	1.83%
Market price volatility factor	40.90%	40.40%	41.40%
Weighted-average expected life of options	'5 years	'5 years	'5 years
Eligible employee contribution, minimum (in percent)	1.00%	'	'
Eligible employee contribution, maximum (in percent)	10.00%	'	'
2006 ESPP	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	400,000	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award	93,388	85,013	76,561
2005 Plan	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,500,000	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	43,495	26,615	15,865
2010 Plan	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	700,000	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	218,820	363,020	431,200

Employee_Benefits_Details_1

Employee Benefits (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]	'	'	'
Compensation expense	$2,677,000	$3,626,000	$4,771,000
Stock Options	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'	'
Options outstanding at beginnig of year	174,062	569,410	943,820
Options exercised	-119,162	-391,348	-374,410
Options forfeited	0	-4,000	0
Options outstanding at year-end	54,900	174,062	569,410
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'	'
Options outstanding at beginnig of year, weighted average exercise price	$13.51	$13.02	$12.62
Options exercised, weighted average exercise price	$11.14	$12.74	$12
Options forfeited, weighted average exercise price	$0	$19.37	$0
Options outstanding at year-end, weighted average exercise price	$18.65	$13.51	$13.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]	'	'	'
Options vested and exercisable at year-end	54,900	174,062	569,410
Options vested and exercisable at year-end, weighted average exercise price	$18.65	$13.51	$13.02
Intrinsic value of options vested and exercisable	2,391,014	5,450,620	10,015,721
Weighted average remaining contractual life of options vested and exercisable (in years)	'11 months 38 days	'1 year 2 months	'2 years
Intrinsic value of options exercised	$4,176,787	$10,246,387	$5,496,861
Weighted average remaining contractual life of options currently outstanding (in years)	'11 months 38 days	'1 year 2 months	'2 years

Employee_Benefits_Details_2

Employee Benefits (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]	'	'	'
Compensation expense	$2,677,000	$3,626,000	$4,771,000
Intrinsic value of SARs vested	16,000,000	10,900,000	7,100,000
SARs	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]	'	'	'
Compensation expense	1,500,000	'	'
Weighted average remaining contractual life of SARs currently outstanding (in years)	'4 years 8 months	'5 years 2 months	'5 years 11 months
SARs / PSARs	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]	'	'	'
Balance at beginning of year	640,220	983,700	1,213,257
Granted	53,500	36,000	33,000
SARs exercised	-134,271	-345,480	-236,610
Forfeited	-22,300	-34,000	-25,947
Balance at year end	537,149	640,220	983,700
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]	'	'	'
SARs outstanding at beginning of year, weighted average exercise price	$20.90	$19.56	$19.42
SARs granted, weighted average exercise price	$43.73	$44.94	$24.70
SARs exercised, weighted average exercise price	$19.21	$19.44	$19.86
SARs forfeited, weighted average exercise price	$18.99	$24.79	$16.56
SARs outstanding at year end, weighted average exercise price	$23.68	$20.90	$19.56
SARs vested and exercisable at year end	384,974	446,970	687,175
SARs vested and exercisable at year end, weighted average exercise price	$20.64	$20.41	$20.29
Weighted average remaining contractual life of SARs vested	3.46	4.25	5.24
Compensation expense	564,000	704,000	1,272,000
Weighted average fair value of SARs granted (in years)	$16.26	$16.21	$9.54
Fair value of shares vested during the year	$566,341	$758,543	$1,612,435

Employee_Benefits_Details_3

Employee Benefits (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted stock units, additional disclosures	'	'	'
Compensation expense	$2,677,000	$3,626,000	$4,771,000
Excess tax benefits from stock-based compensation arrangements	3,427,000	22,197,000	8,970,000
Tax expense related to exercise of stock options	1,200,000	7,769,000	3,139,000
Service based	'	'	'
Restricted stock units, additional disclosures	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'5 years	'	'
Cash-based performance units outstanding	309,202	'	'
Vesting schedule for cash-based RSUs	'five years	'	'
Service and performance based	'	'	'
Restricted stock units, additional disclosures	'	'	'
Weighted average remaining contractual life of stock units currently outstanding (in years)	'8 years 2 months	'	'
Cash-based performance units outstanding	307,418	'	'
Cash based performance	'	'	'
Restricted stock units, additional disclosures	'	'	'
Cash-based RSUs Shares Issued in Period	173,035	344,127	217,337
Cash-based performance units outstanding	616,620	'	'
Cash-based compensation expense	17,287,000	6,440,000	522,000
Cash-based compensation expenset, net of taxes	11,237,000	4,186,000	339,000
Cash based performance | Retirement and transition of CEO	'	'	'
Restricted stock units, additional disclosures	'	'	'
Cash-based compensation expense	4,618,000	'	'
RSUs	'	'	'
Summary of nonvested restricted stock units	'	'	'
Balance at beginning of year	411,919	661,492	897,351
Granted	163,500	105,000	165,891
vested and issued	-151,480	-311,410	-364,065
Forfeited	-20,200	-43,163	-37,685
Balance at year end	403,739	411,919	661,492
Restricted stock units, additional disclosures	'	'	'
Balance at beginning of year, weighted average grant-date fair value	$23.80	$17.44	$14.64
Granted, weighted average grant-date fair value	$45.35	$39.89	$24.77
vested and issued, weighted average grant-date fair value	$20.47	$18.82	$16.07
Forfeited, weighted average grant-date fair value	$24.96	$25.25	$18.70
Balance at year end, weighted average grant-date fair value	$33.72	$23.80	$17.44
Compensation expense	3,551,000	4,875,000	6,068,000
Weighted average remaining contractual life of stock units currently outstanding (in years)	'8 years 2 months	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	11,600,000	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'3 years 8 months	'	'
RSUs | Minimum [Member]	'	'	'
Restricted stock units, additional disclosures	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'4 years	'4 years	'4 years
RSUs | Maximum [Member]	'	'	'
Restricted stock units, additional disclosures	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'5 years	'5 years	'5 years
SARs	'	'	'
Restricted stock units, additional disclosures	'	'	'
Compensation expense	$1,500,000	'	'
Weighted average remaining contractual life of stock units currently outstanding (in years)	'4 years 8 months	'5 years 2 months	'5 years 11 months
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'3 years 7 months	'	'

Financial_Instruments_with_Off2

Financial Instruments with Off-Balance Sheet Risk (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
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	$3,674,391	$2,648,454
Standby letters of credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$145,662	$83,429

Regulatory_Restrictions_Detail

Regulatory Restrictions (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total capital (to risk weighted assets), actual amount	$1,387,312,000	$1,112,924,000
Total capital (to risk weighted assets), actual ratio	10.73%	9.97%
Total capital (to risk weighted assets) for capital adequacy purposes, amount	1,034,721,000	893,231,000
Total capital (to risk weighted assets) for capital adequacy purposes, ratio	8.00%	8.00%
Tier 1 capital (to risk-weighted assets), actual amount	1,184,018,000	923,677,000
Tier 1 capital (to risk-weighted assets), actual ratio	9.15%	8.27%
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, amount	517,361,000	446,616,000
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 capital (to average assets), actual amount	1,184,018,000	923,677,000
Tier 1 capital (to average assets), actual ration	10.87%	9.41%
Tier 1 capital (to average assets) for capital adequacy purposes, amount	435,750,000	392,649,000
Tier 1 capital (to average assets) for capital adequacy purposes, ratio	4.00%	4.00%
Required balance at the Federal Reserve	51,692,000	33,141,000
Federal Deposit Insurance Corporation Assessment Charge	3,000,000	'
Bank	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total capital (to risk weighted assets), actual amount	1,328,227,000	948,328,000
Total capital (to risk weighted assets), actual ratio	10.27%	8.50%
Total capital (to risk weighted assets) for capital adequacy purposes, amount	1,034,406,000	892,806,000
Total capital (to risk weighted assets) for capital adequacy purposes, ratio	8.00%	8.00%
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, amount	1,293,007,000	1,116,008,000
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, ratio	10.00%	10.00%
Tier 1 capital (to risk-weighted assets), actual amount	975,933,000	800,081,000
Tier 1 capital (to risk-weighted assets), actual ratio	7.55%	7.17%
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, amount	517,203,000	446,403,000
Tier 1 capital (to risk-weighted assets) for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, amount	775,804,000	669,605,000
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action provisions, ratio	6.00%	6.00%
Tier 1 capital (to average assets), actual amount	975,933,000	800,081,000
Tier 1 capital (to average assets), actual ration	8.96%	8.16%
Tier 1 capital (to average assets) for capital adequacy purposes, amount	435,601,000	392,433,000
Tier 1 capital (to average assets) for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 capital (to average assets) to be well capitalized under prompt corrective action provisions, amount	$544,502,000	$490,541,000
Tier 1 capital (to average assets) to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended							6 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Numerator:	'	'	'	'	'	'	'	'	'	'	'
Net income from continuing operations	$30,356	$33,474	$24,072	$33,144	$31,435	$32,570	$29,623	$27,081	$121,046	$120,709	$76,102
Preferred stock dividends	'	'	'	'	'	'	'	'	7,394	0	0
Net income available to common shareholders	'	'	'	'	'	'	'	'	113,652	120,709	76,102
Loss from discontinued operations	3	2	1	-1	-6	-34	-1	4	5	-37	-126
Net income available to common shareholders	$27,921	$31,039	$21,635	$33,062	'	'	'	'	$113,657	$120,672	$75,976
Denominator:	'	'	'	'	'	'	'	'	'	'	'
Denominator for basic earnings per share - weighted average shares	40,983,000	40,902,000	40,814,000	40,474,000	40,446,000	39,618,000	38,013,000	37,795,000	40,864,225	39,046,340	37,334,743
Effect of employee stock-based awards	'	'	'	'	'	'	'	'	402,593	645,771	682,694
Effect of warrants to purchase common stock	'	'	'	'	'	'	'	'	513,063	473,736	315,640
Denominator for dilutive earnings per share - adjusted weighted average shares and assumed conversions	41,889,000	41,792,000	41,724,000	41,429,000	41,505,000	40,756,000	39,142,000	38,914,000	41,779,881	40,165,847	38,333,077
Basic earnings per common share from continuing operations	$0.68	$0.76	$0.53	$0.82	$0.78	$0.82	$0.78	$0.72	$2.78	$3.09	$2.04
Basic earnings per common share	$0.68	$0.76	$0.53	$0.82	$0.78	$0.82	$0.78	$0.72	$2.78	$3.09	$2.03
Diluted earnings per share from continuing operations	$0.67	$0.74	$0.52	$0.80	$0.76	$0.80	$0.76	$0.70	$2.72	$3.01	$1.99
Diluted earnings per common share	$0.67	$0.74	$0.52	$0.80	$0.76	$0.80	$0.76	$0.70	$2.72	$3	$1.98
Stock options exluded from computation of EPS	'	'	'	'	'	'	'	'	118,500	79,500	98,000

Fair_Value_Disclosures_Details

Fair Value Disclosures (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available for sale securities	$63,214	$100,195	'	'
OREO	5,110	15,991	34,077	42,261
Mortgage-backed securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available for sale securities	41,462	61,581	'	'
Corporate securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available for sale securities	'	5,080	'	'
Municipals	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available for sale securities	14,505	25,894	'	'
Equity securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available for sale securities	7,247	7,640	'	'
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	9,317	28,473	'	'
Derivative liabilitiy	-9,317	-28,473	'	'
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	41,462	61,581	'	'
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	5,080	'	'
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	14,505	25,894	'	'
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	7,247	7,640	'	'
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	13,474	11,639	'	'
OREO	$5,110	$15,991	'	'

Fair_Value_Disclosures_Details1

Fair Value Disclosures (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Impaired loans	'
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]	'
Asset measured on nonrecurring basis, carrying value	$14.90
Asset measured on nonrecurring basis, specific valuation allowance	1.4
Asset measured on nonrecurring basis, reported fair value	13.5
OREO	'
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]	'
Asset measured on nonrecurring basis, carrying value	$5.10

Fair_Value_Disclosures_Details2

Fair Value Disclosures (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available for sale securities	$63,214	$100,195
Subordinated notes	111,000	111,000
Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	153,911	206,348
Available for sale securities	63,214	100,195
Loans held for sale from discontinued operations	294	302
Loans held for investment, net	11,182,970	9,886,470
Derivative assets	9,317	28,473
Deposits	9,257,379	7,440,804
Federal funds purchased	148,650	273,179
Borrowings	876,980	1,673,982
Subordinated notes	111,000	111,000
Trust preferred subordinated debentures	113,406	113,406
Derivative liabilities	9,317	28,473
Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	153,911	206,348
Available for sale securities	63,214	100,195
Loans held for sale from discontinued operations	294	302
Loans held for investment, net	11,179,145	9,889,303
Derivative assets	9,317	28,473
Deposits	9,257,574	7,441,240
Federal funds purchased	148,650	273,179
Borrowings	861,981	1,673,983
Subordinated notes	96,647	112,757
Trust preferred subordinated debentures	113,406	113,406
Derivative liabilities	$9,317	$28,473

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Abstract]	'	'	'
Rent expense	$10,216,000	$8,993,000	$7,982,000
Minimum future lease payments under operating leases	'	'	'
2012	13,483,000	'	'
2013	14,136,000	'	'
2014	14,085,000	'	'
2015	14,038,000	'	'
2016	13,960,000	'	'
2017 and thereafter	62,335,000	'	'
Total	$132,037,000	'	'

Parent_Company_Only_Details

Parent Company Only (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Sep. 21, 2012	Aug. 01, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Assets	'	'	'	'	'	'
Cash and cash equivalents	$153,911	$206,348	'	'	$110,558	$179,866
Other assets	281,534	316,201	'	'	'	'
Total assets	11,714,691	10,540,844	'	'	'	'
Liabilities and Stockholders' Equity	'	'	'	'	'	'
Other liabilities	110,177	91,581	'	'	'	'
Line of credit	'	'	'	15,000	'	'
Subordinated notes	111,000	111,000	'	'	'	'
Trust preferred subordinated debentures	113,406	113,406	111,000	'	'	'
Total liabilities	10,618,341	9,704,602	'	'	'	'
Preferred stock	150,000	'	'	'	'	'
Common stock	410	407	'	'	'	'
Additional paid-in capital	448,208	450,116	'	'	'	'
Retained earnings	496,112	382,455	'	'	'	'
Treasury stock	-8	-8	'	'	'	'
Accumulated other comprehensive income	1,628	3,272	'	'	'	'
Total stockholders' equity	1,096,350	836,242	'	'	616,331	528,319
Total liabilities and stockholders' equity	11,714,691	10,540,844	'	'	'	'
Texas Capital Bancshares, Inc.	'	'	'	'	'	'
Assets	'	'	'	'	'	'
Cash and cash equivalents	47,605	141,257	'	'	21,004	88,684
Investment in subsidiaries	1,011,823	836,204	'	'	'	'
Other assets	287,734	94,121	'	'	'	'
Total assets	1,347,162	1,071,582	'	'	'	'
Liabilities and Stockholders' Equity	'	'	'	'	'	'
Other liabilities	1,254	782	'	'	'	'
Line of credit	15,000	0	'	'	'	'
Subordinated notes	111,000	111,000	'	'	'	'
Trust preferred subordinated debentures	113,406	113,406	'	'	'	'
Total liabilities	240,660	225,188	'	'	'	'
Preferred stock	150,000	0	'	'	'	'
Common stock	410	407	'	'	'	'
Additional paid-in capital	458,360	460,268	'	'	'	'
Retained earnings	496,112	382,455	'	'	'	'
Treasury stock	8	8	'	'	'	'
Accumulated other comprehensive income	1,628	3,272	'	'	'	'
Total stockholders' equity	1,106,502	846,394	'	'	'	'
Total liabilities and stockholders' equity	$1,347,162	$1,071,582	'	'	'	'

Parent_Company_Only_Details_1

Parent Company Only (Details 1) (USD $)	3 Months Ended							6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Earnings	'	'	'	'	'	'	'	'	'	'	'
Interest And Fee Income Loans And Leases	'	'	'	'	'	'	'	'	$441,314	$393,548	$314,753
Interest expense	6,490	6,441	6,044	6,137	6,614	5,156	4,906	4,902	25,112	21,578	18,663
Salaries and employee benefits	'	'	'	'	'	'	'	'	157,752	121,456	100,535
Legal and professional	'	'	'	'	'	'	'	'	18,104	17,557	14,996
Other non-interest expense	'	'	'	'	'	'	'	'	25,155	22,729	21,167
Income (loss) from continuing operations before income taxes	47,368	52,198	36,614	51,623	49,417	50,886	46,129	42,143	187,803	188,575	118,468
Income tax benefit	'	'	'	'	'	'	'	'	66,760	67,846	42,300
Net income	30,359	33,476	24,073	33,143	31,429	32,536	29,622	27,085	121,051	120,672	75,976
Preferred stock dividends	-2,438	-2,437	-2,438	-81	'	'	'	'	-7,394	0	0
Net income available to common shareholders	'	'	'	'	'	'	'	'	113,652	120,709	76,102
Texas Capital Bancshares, Inc.	'	'	'	'	'	'	'	'	'	'	'
Statement of Earnings	'	'	'	'	'	'	'	'	'	'	'
Interest And Fee Income Loans And Leases	'	'	'	'	'	'	'	'	10,382	1,484	0
Dividend income	'	'	'	'	'	'	'	'	76	83	77
Other income	'	'	'	'	'	'	'	'	72	38	72
Total income	'	'	'	'	'	'	'	'	10,530	1,605	149
Interest expense	'	'	'	'	'	'	'	'	9,863	4,913	2,573
Salaries and employee benefits	'	'	'	'	'	'	'	'	669	668	618
Legal and professional	'	'	'	'	'	'	'	'	2,605	2,094	1,919
Other non-interest expense	'	'	'	'	'	'	'	'	651	744	450
Total expense	'	'	'	'	'	'	'	'	13,788	8,419	5,560
Income (loss) from continuing operations before income taxes	'	'	'	'	'	'	'	'	-3,258	-6,814	-5,411
Income tax benefit	'	'	'	'	'	'	'	'	-1,165	-2,435	-1,887
Loss before equity in undistributed income of subsidiary	'	'	'	'	'	'	'	'	-2,093	-4,379	-3,524
Equity in undistributed income of subsidiary	'	'	'	'	'	'	'	'	123,144	124,951	79,500
Net income	'	'	'	'	'	'	'	'	121,051	120,572	75,976
Preferred stock dividends	'	'	'	'	'	'	'	'	-7,394	0	0
Net income available to common shareholders	'	'	'	'	'	'	'	'	$113,657	$120,572	$75,976

Parent_Company_Only_Details_2

Parent Company Only (Details 2) (USD $)

0 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Aug. 01, 2012

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Jun. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Operating activities

'

'

'

'

'

'

'

'

'

'

'

'

Net income

'

$30,359

$33,476

$24,073

$33,143

$31,429

$32,536

$29,622

$27,085

$121,051

$120,672

$75,976

Adjustments to reconcile net income to net cash used in operating activities:

'

'

'

'

'

'

'

'

'

'

'

'

Increase in other assets

'

'

'

'

'

'

'

'

'

31,002

-61,334

-63,247

Tax benefit from stock option exercises

'

'

'

'

'

'

'

'

'

1,200

7,769

3,139

Excess tax benefits from stock-based compensation arrangements

'

'

'

'

'

'

'

'

'

-3,427

-22,197

-8,970

Increase (decrease) in other liabilities

'

'

'

'

'

'

'

'

'

2,308

3,066

32,694

Net cash used in operating activities of continuing operations

'

'

'

'

'

'

'

'

'

189,137

74,790

75,882

Investing Activity

'

'

'

'

'

'

'

'

'

'

'

'

Net cash provided by investing activities of continuing operations

'

'

'

'

'

'

'

'

'

-1,275,875

-2,263,185

-1,727,406

Financing Activities

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of stock related to stock-based awards

'

'

'

'

'

'

'

'

'

-2,210

355

2,190

Sale of common stock

87,000

'

'

'

'

'

'

'

'

0

86,987

0

Proceeds from issuance of preferred stock and related warrants

'

'

'

'

'

'

'

'

'

144,987

0

0

Proceeds from issuance of subordinated notes

'

'

'

'

'

'

'

'

'

0

111,000

0

Preferred dividends paid

'

'

'

'

'

'

'

'

'

-7,000

'

'

Net other borrowings

'

'

'

'

'

'

'

'

'

-797,002

318,115

1,341,761

Excess tax benefits from stock-based compensation arrangements

'

'

'

'

'

'

'

'

'

3,427

22,197

8,970

Net cash (used in) financing activities of continuing operations

'

'

'

'

'

'

'

'

'

1,034,288

2,284,131

1,582,245

Net increase (decrease) in cash and cash equivalents

'

'

'

'

'

'

'

'

'

-52,437

95,790

-69,308

Cash and cash equivalents at beginning of period

'

'

'

'

206,348

'

'

'

110,558

206,348

110,558

179,866

Cash and cash equivalents at end of period

'

153,911

'

'

'

206,348

'

'

'

153,911

206,348

110,558

Texas Capital Bancshares, Inc.

'

'

'

'

'

'

'

'

'

'

'

'

Operating activities

'

'

'

'

'

'

'

'

'

'

'

'

Net income

'

'

'

'

'

'

'

'

'

121,051

120,572

75,976

Adjustments to reconcile net income to net cash used in operating activities:

'

'

'

'

'

'

'

'

'

'

'

'

Equity in undistributed income of subsidiary

'

'

'

'

'

'

'

'

'

-123,144

-124,951

-79,500

Increase in other assets

'

'

'

'

'

'

'

'

'

-3,613

-11,562

-3,747

Tax benefit from stock option exercises

'

'

'

'

'

'

'

'

'

1,200

7,769

3,139

Excess tax benefits from stock-based compensation arrangements

'

'

'

'

'

'

'

'

'

-3,427

-22,197

-8,970

Increase (decrease) in other liabilities

'

'

'

'

'

'

'

'

'

37

83

262

Net cash used in operating activities of continuing operations

'

'

'

'

'

'

'

'

'

-7,896

-30,286

-12,840

Investing Activity

'

'

'

'

'

'

'

'

'

'

'

'

Investment in subsidiaries

'

'

'

'

'

'

'

'

'

-240,000

-70,000

-66,000

Net cash provided by investing activities of continuing operations

'

'

'

'

'

'

'

'

'

-240,000

-70,000

-66,000

Financing Activities

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of stock related to stock-based awards

'

'

'

'

'

'

'

'

'

-2,210

355

2,190

Sale of common stock

'

'

'

'

'

'

'

'

'

0

86,987

0

Proceeds from issuance of preferred stock and related warrants

'

'

'

'

'

'

'

'

'

144,987

0

0

Proceeds from issuance of subordinated notes

'

'

'

'

'

'

'

'

'

0

111,000

0

Repurchase of preferred stock

'

'

'

'

'

'

'

'

'

0

0

0

Preferred dividends paid

'

'

'

'

'

'

'

'

'

-6,960

0

0

Net other borrowings

'

'

'

'

'

'

'

'

'

15,000

0

0

Excess tax benefits from stock-based compensation arrangements

'

'

'

'

'

'

'

'

'

3,427

22,197

8,970

Net cash (used in) financing activities of continuing operations

'

'

'

'

'

'

'

'

'

154,244

220,539

11,160

Net increase (decrease) in cash and cash equivalents

'

'

'

'

'

'

'

'

'

-93,652

120,253

-67,680

Cash and cash equivalents at beginning of period

'

'

'

'

141,257

'

'

'

21,004

141,257

21,004

88,684

Cash and cash equivalents at end of period

'

$47,605

'

'

'

$141,257

'

'

'

$47,605

$141,257

$21,004

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended							6 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Loans held for sale from discontinued operations	$294,000	'	'	'	'	'	'	'	$294,000	'	'
Results of operations of the disclontinued components	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	27,000	-26,000	58,000
Expenses	'	'	'	'	'	'	'	'	19,000	31,000	250,000
Loss before income taxes	'	'	'	'	'	'	'	'	8,000	-57,000	-192,000
Income tax benefit	'	'	'	'	'	'	'	'	-3,000	20,000	66,000
Loss from discontinued operations	$3,000	$2,000	$1,000	($1,000)	($6,000)	($34,000)	($1,000)	$4,000	$5,000	($37,000)	($126,000)

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Credit Risk Derivatives [Abstract]	'	'
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.	'
Cash Pledged As Derivative Collateral	$10,700,000	$12,300,000
Commercial loan/lease	'	'
Credit Risk Derivatives [Abstract]	'	'
Credit exposure on risk derivatives	9,300,000	'
Interest rate swaps | Non-hedging | Commercial loan/lease	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value, Derivative Assets	8,652,000	28,469,000
Estimated Fair Value, Derivative Liabilities	-8,652,000	-28,469,000
Notional Amount, Derivative Assets	764,939,000	523,216,000
Notional Amount, Derivative Liabilities	-764,939,000	-523,216,000
Interest rate swaps | Non-hedging | Commercial loan/lease | Interest Rate Received	'	'
Derivatives, Fair Value [Line Items]	'	'
Weighted-average receive and pay interest rate	2.99%	4.76%
Interest rate swaps | Non-hedging | Commercial loan/lease | Interest Rate Paid	'	'
Derivatives, Fair Value [Line Items]	'	'
Weighted-average receive and pay interest rate	4.89%	3.11%
Interest Rate Caps | Non-hedging | Commercial loan/lease	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value, Derivative Assets	-665,000	-4,000
Estimated Fair Value, Derivative Liabilities	665,000	4,000
Notional Amount, Derivative Assets	-58,706,000	-42,380,000
Notional Amount, Derivative Liabilities	$58,706,000	$42,380,000

Stockholders_Equity_Details

Stockholder's Equity (Details) (USD $)	0 Months Ended	3 Months Ended				12 Months Ended
In Thousands, except Share data, unless otherwise specified	Aug. 01, 2012	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity Distribution Agreement [Line Items]	'	'	'	'	'	'	'	'
Issuance of common stock	2,300,000	'	'	'	'	'	'	'
Sale of common stock	$87,000	'	'	'	'	$0	$86,987	$0
Total dividend and reduction of earnings available to common stockholders	'	$2,438	$2,437	$2,438	$81	$7,394	$0	$0
Warrants outstanding	'	710,598	'	'	'	710,598	'	'
Warrants, price per share	'	$14.84	'	'	'	$14.84	'	'

Stockholders_Equity_Narratives

Stockholder's Equity (Narratives) (Details) (USD $)	0 Months Ended	12 Months Ended
	Aug. 01, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 28, 2013	Jan. 31, 2009
Stockholders' Equity [Abstract]	'	'	'	'	'	'
Warrants outstanding	'	710,598	'	'	'	'
Warrants, price per share	'	$14.84	'	'	'	'
Issuance of stock - Shares	2,300,000	'	'	'	'	'
Sale of common stock	$87,000,000	$0	$86,987,000	$0	'	'
Line of credit	15,000,000	'	'	'	'	'
Issuance of preferred stock	'	6,000,000	0	'	6,000,000	75,000,000
Preferred dividends paid	'	-7,000,000	'	'	'	'
Net proceeds from issuance of preferred stock	'	$144,987,000	$0	$0	'	'
Preferred Stock Dividend Rate Percentage	'	6.50%	'	'	'	'
Preferred Stock Par Or Stated Value Per Share	'	$0.01	$0.01	'	'	'
Preferred Stock Liquidation Preference	'	$25	'	'	'	'

Quarterly_Financial_Data_detai

Quarterly Financial Data (details) (USD $)	3 Months Ended							6 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Interest income	$117,965	$115,217	$107,264	$104,179	$107,769	$102,011	$95,546	$93,131	$444,625	$398,457	$321,600
Interest expense	6,490	6,441	6,044	6,137	6,614	5,156	4,906	4,902	25,112	21,578	18,663
Net interest income	111,475	108,776	101,220	98,042	101,155	96,855	90,640	88,229	419,513	376,879	302,937
Provision for credit losses	5,000	5,000	7,000	2,000	4,500	3,000	1,000	3,000	19,000	11,500	28,500
Net interest income after provision for credit losses	106,475	103,776	94,220	96,042	96,655	93,855	89,640	85,229	400,513	365,379	274,437
Non-interest income	11,184	10,431	11,128	11,281	12,836	10,552	10,462	9,190	44,024	43,040	32,232
Non-interest expense	70,291	62,009	68,734	55,700	60,074	53,521	53,973	52,276	256,734	219,844	188,201
Income (loss) from continuing operations before income taxes	47,368	52,198	36,614	51,623	49,417	50,886	46,129	42,143	187,803	188,575	118,468
Income tax expense	17,012	18,724	12,542	18,479	17,982	18,316	16,506	15,062	66,757	67,866	42,366
Income from continuing operations	30,356	33,474	24,072	33,144	31,435	32,570	29,623	27,081	121,046	120,709	76,102
Loss from discontinued operations (after-tax)	3	2	1	-1	-6	-34	-1	4	5	-37	-126
Net income	30,359	33,476	24,073	33,143	31,429	32,536	29,622	27,085	121,051	120,672	75,976
Preferred stock dividends	-2,438	-2,437	-2,438	-81	'	'	'	'	-7,394	0	0
Net income available to common shareholders	$27,921	$31,039	$21,635	$33,062	'	'	'	'	$113,657	$120,672	$75,976
Basic earnings per share	'	'	'	'	'	'	'	'	'	'	'
Income from continuing operations	$0.68	$0.76	$0.53	$0.82	$0.78	$0.82	$0.78	$0.72	$2.78	$3.09	$2.04
Net income	$0.68	$0.76	$0.53	$0.82	$0.78	$0.82	$0.78	$0.72	$2.78	$3.09	$2.03
Diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Income from continuing operations	$0.67	$0.74	$0.52	$0.80	$0.76	$0.80	$0.76	$0.70	$2.72	$3.01	$1.99
Net income	$0.67	$0.74	$0.52	$0.80	$0.76	$0.80	$0.76	$0.70	$2.72	$3	$1.98
Average shares	'	'	'	'	'	'	'	'	'	'	'
Basic	40,983,000	40,902,000	40,814,000	40,474,000	40,446,000	39,618,000	38,013,000	37,795,000	40,864,225	39,046,340	37,334,743
Diluted	41,889,000	41,792,000	41,724,000	41,429,000	41,505,000	40,756,000	39,142,000	38,914,000	41,779,881	40,165,847	38,333,077

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	0 Months Ended	12 Months Ended			1 Months Ended
	Aug. 01, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 29, 2014	Jan. 31, 2014
					Subsequent Event [Member]	Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'
Common Stock Shares Issued	'	41,036,787	40,727,996	'	1,700,000	'
Proceeds from issuance of common stock	$87,000,000	$0	$86,987,000	$0	$96,600,000	'
Proceeds from Issuance of Subordinated Notes	'	'	'	'	'	175,000,000
Net proceeds from debt issuance	'	'	'	'	'	$172,100,000
Interest rate	'	'	'	'	'	5.25%
Debt instrument frequency of payment	'	'	'	'	'	'semi-annually