Texas Capital Bancshares (TCBI) 10-Q 24 Apr 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	3 Months Ended
	Mar. 31, 2014	Apr. 21, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Amendment Flag	'false	'
Entity Registrant Name	'TEXAS CAPITAL BANCSHARES INC/TX	'
Entity Central Index Key	'0001077428	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Common Stock, Shares Outstanding	'	43,060,293
Entity Public Float	'	$2,745,524,282
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'	'
Cash and due from banks	$111,594	$92,484	'
Interest-bearing Deposits in Banks	146,205	61,337	'
Federal funds sold and securities purchased under resale agreements	0	90	'
Securities, available-for-sale	52,960	63,214	'
Loans held for sale from discontinued operations	292	'	294
Loans held for investment, mortgage finance	2,688,044	2,784,265	2,784,265
Loans held for investment (net of unearned income)	8,928,033	'	8,486,309
Less: Allowance for loan losses	90,234	87,604	75,000
Loans held for investment, net	11,525,843	11,182,970	'
Premises and equipment, net	11,767	11,482	'
Accrued interest receivable and other assets	273,812	281,534	'
Goodwill and intangible assets, net	21,115	21,286	'
Total assets	12,143,588	11,714,691	'
Deposits:	'	'	'
Non-interest bearing	3,451,294	3,347,567	'
Interest bearing	5,886,363	5,579,505	'
Interest bearing in foreign branches	391,471	330,307	'
Total deposits	9,729,128	9,257,379	'
Accrued interest payable	2,304	749	'
Other liabilities	104,593	110,177	'
Federal funds purchased	143,573	148,650	'
Repurchase agreements	29,432	21,954	'
Other borrowings	505,021	855,026	'
Subordinated notes	286,000	111,000	'
Trust preferred subordinated debentures	113,406	113,406	'
Total liabilities	10,913,457	10,618,341	'
Stockholders' equity:	'	'	'
Preferred stock, $.01 par value, $1,000 liquidation value: Authorized shares - 10,000,000; Issued shares - none	150,000	150,000	'
Common stock, $.01 par value: Authorized shares - 100,000,000; Issued shares - 36,957,104 and 35,919,941 at December 31 2010 and 2009, respectively	430	410	'
Additional paid-in capital	556,247	448,208	'
Retained earnings	521,939	496,112	'
Treasury stock	8	8	'
Accumulated other comprehensive income	1,523	1,628	'
Total stockholders' equity	-1,230,131	-1,096,350	'
Total liabilities and stockholders' equity	$12,143,588	$11,714,691	'

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Preferred Stock, Par or Stated Value Per Share	$0.01	$0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	6,000,000	6,000,000
Common Stock, Par or Stated Value Per Share	($0.01)	($0.01)
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	42,959,220	41,036,787
Treasury Stock, Shares	417	417

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest income	'	'
Interest and fees on loans	$115,872	$103,182
Securities	540	939
Federal funds sold	40	6
Deposits in other banks	159	52
Interest and Dividend Income, Operating, Total	116,611	104,179
Interest expense	'	'
Deposits	4,030	3,245
Federal funds purchased	95	212
Repurchase agreements	4	4
Other borrowings	72	213
Subordinated notes	3,479	1,829
Trust preferred submordinated debentures	616	634
Interest Expense, Total	8,296	6,137
Net interest income	108,315	98,042
Provision for credit losses	5,000	2,000
Net interest income after provision for credit losses	103,315	96,042
Non-interest income	'	'
Service charges on deposit accounts	1,696	1,701
Trust fee income	1,282	1,241
Bank Owned Life Insurance (BOLI) Income	509	498
Brokered loan fees	2,824	4,744
Swap fee income	1,224	1,652
Other	2,821	1,445
Total non-interest income	10,356	11,281
Non-interest expense	'	'
Salaries and employee benefits	42,056	33,541
Net occupancy expense	4,768	3,857
Marketing	3,759	3,972
Legal and professional	5,402	3,940
Communications and technology	3,924	3,122
FDIC insurance assessment	2,725	1,078
Allowance and other carrying costs for OREO	45	430
Other	6,642	5,760
Total non-interest expense	69,321	55,700
Income (loss) from continuing operations before income taxes	44,350	51,623
Income tax expense	16,089	18,479
Income from continuing operations	28,261	33,144
Income (loss) from discontinued operations (after-tax)	4	-1
Net income	28,265	33,143
Preferred stock dividends	2,438	81
Net income available to common shareholders	25,827	33,062
Basic earnings per common share	'	'
Income from continuing operations	$0.61	$0.82
Net income	$0.61	$0.82
Diluted earnings per common share	'	'
Income from continuing operations	$0.60	$0.80
Net income	$0.60	$0.80
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	'	'
Change in unrealized gain on available-for-sale securities arising during period, before tax	-162	-725
Income tax benefit related to unrealized gain on available-for-sale securities	57	254
Other Comprehensive Income, net of tax	-105	-471
Comprehensive income:	'	'
Comprehensive income	$28,160	$32,672

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
In Thousands, except Share data, unless otherwise specified
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2012	$836,242	$0	$407	$450,116	$382,455	($8)	$3,272
Shares, Outstanding, Beginning Balance at Dec. 31, 2012	'	0	40,727,996	'	'	-417	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	33,143	'	'	'	33,143	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $100 (unaudited)	-471	'	'	'	'	'	-471
Comprehensive income	32,672	'	'	'	'	'	'
Tax expense related to exercise of stock options	'	'	'	-1,362	'	'	'
Stock-based compensation expense recognized in earnings	-1,944	'	'	905	'	'	'
Issuance of common stock related to stock-based awards - Value	-259	'	1	-260	'	'	'
Issuance of common stock related to stock-based awards - Shares	'	'	43,835	'	'	'	'
Issuance of preferred stock - Value	145,078	150,000	'	-4,922	'	'	'
Issuance of preferred stock - Shares	'	6,000,000	'	'	'	'	'
Preferred stock dividend and accretion of preferred stock discount	0	'	'	'	81	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2013	1,013,195	150,000	408	444,477	415,517	-8	2,801
Shares, Outstanding, Ending Balance at Mar. 31, 2013	'	6,000,000	40,771,831	'	'	-417	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2013	1,096,350	150,000	410	448,208	496,112	-8	1,628
Shares, Outstanding, Beginning Balance at Dec. 31, 2013	'	6,000,000	41,036,787	'	'	-417	'
Comprehensive income:	'	'	'	'	'	'	'
Net income	28,265	'	'	'	28,265	'	'
Change in unrealized gain on available-for-sale securities, net of taxes of $100 (unaudited)	-105	'	'	'	'	'	-105
Comprehensive income	28,160	'	'	'	'	'	'
Tax expense related to exercise of stock options	'	'	'	955	'	'	'
Stock-based compensation expense recognized in earnings	-4,655	'	'	1,262	'	'	'
Issuance of common stock related to stock-based awards - Value	-706	'	1	-707	'	'	'
Issuance of common stock related to stock-based awards - Shares	'	'	46,660	'	'	'	'
Issuance of common stock - Value	106,548	'	19	106,529	'	'	'
Issuance of common stock - Shares	'	'	1,875,000	'	'	'	'
Issuance of common stock related to warrants - Value	0	'	0	0	'	'	'
Issuance of common stock related to warrants - Shares	'	'	773	'	'	'	'
Issuance of preferred stock - Value	0	'	0	0	'	'	'
Issuance of preferred stock - Shares	'	0	'	'	'	'	'
Preferred stock dividend and accretion of preferred stock discount	2,438	'	'	'	2,438	'	'
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2014	$1,230,131	$150,000	$430	$556,247	$521,939	($8)	$1,523
Shares, Outstanding, Ending Balance at Mar. 31, 2014	'	6,000,000	42,959,220	'	'	-417	'

CONSOLIDATED_STATEMENTS_OF_STO1

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parentheticals) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Available-for-sale Securities, Income Tax Expense on Change in Unrealized Holding Gain (Loss)	$57	$254

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating activities	'	'
Net income from continuing operations	$28,261	$33,144
Adjustments to reconcile net income to net cash (used in) operating activities	'	'
Provision for credit losses	5,000	2,000
Depreciation and amortization	3,012	1,225
Amortiziation and accretion on securities	1	7
Bank Owned Life Insurance (BOLI) Income	-509	-498
Tax benefit from stock option exercises	955	-1,362
Excess tax benefits from stock-based compensation arrangements	-2,729	3,890
Loss on sale of assets	136	-52
Changes in operating assets and liabilities:	'	'
Accrued interest receivable and other assets	2,724	27,725
Accrued interest payable and other liabilities	-4,763	6,200
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total	36,743	74,223
Net cash (used in) operating activities of discontinued operations	6	1
Net Cash Provided by (Used in) Operating Activities, Total	36,749	74,224
Net cash used in investing activities of continuing operations	'	'
Payments to Acquire Available-for-sale Securities	0	0
Maturities and calls of available-for-sale securities	7,440	6,185
Principal payments received on available-for-sale securities	2,651	5,318
Originations of mortgage finance loans	9,687,691	13,173,476
Proceeds from pay-offs of mortgage finance loans	9,783,912	13,770,918
Net (increase) decrease in loans held for investment	-444,070	-135,812
Purchase of premises and equipment, net	-1,161	-709
Proceeds from sale of foreclosed assets	-3,405	-1,518
Cash paid for acquisition	0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations, Total	-335,514	473,942
Net cash provided by financing activities of continuing operations	'	'
Net increase (decrease) in deposits	471,749	305,027
Proceeds from issuance of stock related to stock-based awards	-706	-259
Proceeds from issuance of common stock	106,548	0
Proceeds from issuance of preferred stock and related warrants	0	145,078
Preferred stock dividend and accretion of preferred stock discount	-2,438	0
Net increase (decrease) in other borrowings	-342,527	-1,188,846
Proceeds from issuance of subordinated notes	172,375	0
Excess tax benefits from stock-based compensation arrangements	2,729	-3,890
Net (decrease) in federal funds purchased	-5,077	179,819
Net Cash Provided by (Used in) Financing Activities, Continuing Operations, Total	402,653	-563,071
Cash and Cash Equivalents, Period Increase (Decrease), Total	103,888	-14,905
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	153,911	206,348
Cash and Cash Equivalents, at Carrying Value, Ending Balance	257,799	191,443
Supplemental disclosures of cash flow information:	'	'
Cash paid during the period for interest	6,741	5,774
Cash paid during the period for income taxes	882	2,694
Non-cash transactions:	'	'
Transfers from loans/leases to OREO and other repossessed assets	$851	$0

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	(2) EARNINGS PER COMMON SHARE
	The following table presents the computation of basic and diluted earnings per share (in thousands except per share data):
				Three months ended March 31,
					2014		2013
	Numerator:
		Net income from continuing operations		$	28,261	$	33,144
		Preferred stock dividends			2,438		81
		Net income from continuing operations available to common shareholders			25,823		33,063
		Income (loss) from discontinued operations			4		-1
		Net income		$	25,827	$	33,062
	Denominator:
		Denominator for basic earnings per share - weighted average shares			42,298,355		40,473,857
		Effect of employee stock-based awards(1)			381,597		456,996
		Effect of warrants to purchase common stock			540,009		498,391
		Denominator for dilutive earnings per share - adjusted weighted average
			shares and assumed conversions		43,219,961		41,429,244
	Basic earnings per common share from continuing operations			$	0.61	$	0.82
	Basic earnings per common share			$	0.61	$	0.82
	Diluted earnings per share from continuing operations			$	0.6	$	0.8
	Diluted earnings per common share			$	0.6	$	0.8
	(1)       Stock options, SARs and RSUs outstanding of 23,000 at March 31, 2014 and 46,500 at March 31, 2013 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

Securities

Securities	3 Months Ended
	Mar. 31, 2014															Mar. 31, 2013
Available-for-sale Securities [Abstract]	'															'
Securities	'															'
	(3) SECURITIES																			31-Mar-14
																						After One		After Five
	Securities are identified as either held-to-maturity or available-for-sale based upon various factors, including asset/liability management strategies, liquidity and profitability objectives, and regulatory requirements. Held-to-maturity securities are carried at cost, adjusted for amortization of premiums or accretion of discounts. Available-for-sale securities are securities that may be sold prior to maturity based upon asset/liability management decisions. Securities identified as available-for-sale are carried at fair value. Unrealized gains or losses on available-for-sale securities are recorded as accumulated other comprehensive income in stockholders' equity, net of taxes. Amortization of premiums or accretion of discounts on mortgage-backed securities is periodically adjusted for estimated prepayments. Realized gains and losses and declines in value judged to be other-than-temporary are included in gain (loss) on sale of securities. The cost of securities sold is based on the specific identification method.																			Less Than		Through		Through		After Ten
																				One Year		Five Years		Ten Years		Years		Total
	At March 31, 2014, our net unrealized gain on the available-for-sale securities portfolio was $2.3 million compared to $2.5 million at December 31, 2013. As indicated by the difference in the gain as a percent of the amortized cost, the reduction in the total unrealized gain was due almost entirely to the reduction in the balances of the securities held. As a percent of outstanding balances, the unrealized gain was 4.63% and 4.13% at March 31, 2014 and December 31, 2013, respectively.															Available-for-sale:
	The following is a summary of securities (in thousands):																Residential mortgage-backed
					31-Mar-14													securities:(1)
							Gross		Gross		Estimated							Amortized cost	$	78	$	13,301	$	7,136	$	15,616	$	36,131
					Amortized		Unrealized		Unrealized		Fair							Estimated fair value		82		14,132		7,863		16,597		38,674
					Cost		Gains		Losses		Value							Weighted average yield(3)		4.69%		4.78%		5.55%		2.40%		3.90%
	Available-for-Sale Securities:																Municipals:(2)
		Residential mortgage-backed securities		$	36,131	$	2,543	$	-	$	38,674							Amortized cost		4,648		2,316		-		-		6,964
		Municipals			6,964		42		-		7,006							Estimated fair value		4,681		2,325		-		-		7,006
		Equity securities(1)			7,522		-		-242		7,280							Weighted average yield(3)		6.00%		5.75%		-		-		5.92%
				$	50,617	$	2,585	$	-242	$	52,960						Equity securities:(4)
																		Amortized cost		7,522		-		-		-		7,522
					31-Dec-13													Estimated fair value		7,280		-		-		-		7,280
							Gross		Gross		Estimated						Total available-for-sale securities:
					Amortized		Unrealized		Unrealized		Fair							Amortized cost									$	50,617
					Cost		Gains		Losses		Value							Estimated fair value									$	52,960
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	38,786	$	2,676	$	-	$	41,462									31-Dec-13
		Municipals			14,401		104		-		14,505											After One		After Five
		Equity securities(1)			7,522		-		-275		7,247									Less Than		Through		Through		After Ten
				$	60,709	$	2,780	$	-275	$	63,214									One Year		Five Years		Ten Years		Years		Total
	(1) Equity securities consist of Community Reinvestment Act funds.															Available-for-sale:
																	Residential mortgage-backed
	The amortized cost and estimated fair value of securities are presented below by contractual maturity (in thousands, except percentage data):																	securities:(1)
	(1)       Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.																	Amortized cost	$	238	$	14,720	$	7,718	$	16,110	$	38,786
	(2)       Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.																	Estimated fair value		252		15,641		8,456		17,113		41,462
	(3)       Yields are calculated based on amortized cost.																	Weighted average yield(3)		4.32%		4.78%		5.56%		2.40%		3.94%
	(4)       These equity securities do not have a stated maturity.																Municipals:(2)
																		Amortized cost		7,749		6,652		-		-		14,401
	Securities with carrying values of approximately $40.7 million were pledged to secure certain borrowings and deposits at March 31, 2014. Of the pledged securities at March 31, 2014, approximately $8.6 million were pledged for certain deposits, and approximately $32.1 million were pledged for repurchase agreements.																	Estimated fair value		7,818		6,687		-		-		14,505
																		Weighted average yield(3)		5.76%		5.71%		-		-		5.73%
	The following table discloses, as of March 31, 2014 and December 31, 2013, our investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months (in thousands):																Equity securities:(4)
	31-Mar-14	Less Than 12 Months					12 Months or Longer					Total						Amortized cost		7,522		-		-		-		7,522
		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss				Estimated fair value		7,247		-		-		-		7,247
																	Total available-for-sale securities:
	Equity securities	$	1,019	$	-3		$	6,261	$	-239		$	7,280	$	-242			Amortized cost									$	60,709
																		Estimated fair value									$	63,214
	31-Dec-13	Less Than 12 Months					12 Months or Longer					Total
		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
	Equity securities	$	7,247	$	-275		$	-	$	-		$	7,247	$	-275
	At March 31, 2014, there were two securities with an unrealized loss position. These securities are publicly traded equity funds and are subject to market pricing volatility. We do not believe 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 these securities.
	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 $28.2 million for the three months ended March 31, 2014 and comprehensive income of $32.7 million for the three months ended March 31, 2013. Comprehensive income during the three months ended March 31, 2014 and 2013 included a net after-tax loss of $105,000 and $471,000, respectively, due to changes in the net unrealized gains/losses on securities available-for-sale.

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses	3 Months Ended																		9 Months Ended
	Mar. 31, 2014																		Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]	'																		'
Loans and Allowance for Credit Losses	'																		'
	Loans																		(4) LOANS AND ALLOWANCE FOR LOAN LOSSES
	Loans Held for Investment																		At March 31, 2014 and December 31, 2013, loans were as follows (in thousands):
	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.																				March 31,		December 31,
																					2014		2013
	A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. 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.
																			Commercial	$	5,205,515	$	5,020,565
	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.																		Mortgage finance		2,688,044		2,784,265
																			Construction		1,437,609		1,262,905
	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.																		Real estate		2,229,349		2,146,228
																			Consumer		14,815		15,350
	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.																		Leases		95,262		93,160
	31-Mar-14																		Gross loans held for investment		11,670,594		11,322,473
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total			Deferred income (net of direct origination costs)		-54,517		-51,899
	Grade:																		Allowance for loan losses		-90,234		-87,604
		Pass	$	5,086,156	$	2,688,044	$	1,437,383	$	2,184,419	$	14,747	$	92,054	$	11,502,803			Total	$	11,525,843	$	11,182,970
		Special mention		33,212		-		123		7,334		-		203		40,872			Commercial Loans and Leases. Our commercial loan and lease portfolio is comprised of lines of credit for working capital and term loans and leases to finance equipment and other business assets. Our energy production loans are generally collateralized with proven reserves based on appropriate valuation standards. Our commercial loans and leases are underwritten after carefully evaluating and understanding the borrower's ability to operate profitably. Our underwriting standards are designed to promote relationship banking rather than making loans on a transactional basis. Our lines of credit typically are limited to a percentage of the value of the assets securing the line. Lines of credit and term loans typically are reviewed annually and are supported by accounts receivable, inventory, equipment and other assets of our clients' businesses.
		Substandard-accruing		59,313		-		103		21,267		60		2,963		83,706
		Non-accrual		26,834		-		-		16,329		8		42		43,213			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.
	Total loans held for
		investment	$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594			Construction Loans. Our construction loan portfolio consists primarily of single- and multi-family residential properties and commercial projects used in manufacturing, warehousing, service or retail businesses. Our construction loans generally have terms of one to three years. We typically make construction loans to developers, builders and contractors that have an established record of successful project completion and loan repayment and have a substantial equity investment in the borrowers. However, construction loans are generally based upon estimates of costs and value associated with the completed project. Sources of repayment for these types of loans may be pre-committed permanent loans from other lenders, sales of developed property, or an interim loan commitment from us until permanent financing is obtained. The nature of these loans makes ultimate repayment extremely sensitive to overall economic conditions. Borrowers may not be able to correct conditions of default in loans, increasing risk of exposure to classification, non-performing status, reserve allocation and actual credit loss and foreclosure. These loans typically have floating rates and commitment fees for unused balances.
	31-Dec-13																		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.
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:																		As of March 31, 2014, a substantial majority of the principal amount of the loans held for investment in our portfolio was to businesses and individuals in Texas. This geographic concentration subjects the loan portfolio to the general economic conditions within this area. The risks created by this concentration have been considered by management in the determination of the appropriateness of the allowance for loan losses. Management believes the allowance for loan losses is appropriate to cover probable losses inherent in the loan portfolio at each balance sheet date.
		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			At March 31, 2014 and December 31, 2013, we had a blanket floating lien based on certain real estate loans used as collateral for Federal Home Loan Bank (“FHLB”) borrowings.
		Substandard-accruing		74,593		-		103		21,770		45		3,742		100,253
		Non-accrual		12,896		-		705		18,670		54		50		32,375			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.
	Total loans held for
		investment	$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473			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 non-accrual depending on the circumstances of the individual loans. Loans classified as doubtful have all the weaknesses inherent in substandard loans with the added characteristics that the weaknesses make collection or liquidation in full highly questionable and improbable. The possibility of loss is extremely high. All doubtful loans are on nonaccrual.
	The following table details activity in the reserve for loan losses by portfolio segment for the three months ended March 31, 2014 and March 31, 2013. Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories.
	31-Mar-14																		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.
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
																			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.
	Beginning balance		$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	Provision for loan																		The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of March 31, 2014 and December 31, 2013 (in thousands):
		losses		6,245		-		583		-495		56		-575		-1,104		4,710
	Charge-offs			2,336		-		-		-		61		50		-		2,447
	Recoveries			210		-		-		8		25		124		-		367
	Net charge-offs
		(recoveries)		2,126		-		-		-8		36		-74		-		2,080
	Ending balance		$	43,987	$	-	$	15,136	$	23,723	$	169	$	2,604	$	4,615	$	90,234
	Period end amount allocated to:
		Loans individually
		evaluated for
		impairment	$	6,029	$	-	$	-	$	993	$	1	$	6	$	-	$	7,029
		Loans collectively
		evaluated for
		impairment		37,958		-		15,136		22,730		168		2,598		4,615		83,205
	Ending balance		$	43,987	$	-	$	15,136	$	23,723	$	169	$	2,604	$	4,615	$	90,234
	31-Mar-13
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance		$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
	Provision for loan
		losses		3,567		-		-3,614		4,183		-24		-474		-1,759		1,879
	Charge-offs			1,648		-		-		105		19		-		-		1,772
	Recoveries			397		-		-		8		30		121		-		556
	Net charge-offs
		(recoveries)		1,251		-		-		97		-11		-121		-		1,216
	Ending balance		$	23,863	$	-	$	8,483	$	34,979	$	213	$	2,107	$	5,355	$	75,000
	Period end amount allocated to:
		Loans individually
		evaluated for
		impairment	$	5,069	$	-	$	-	$	812	$	15	$	10	$	-	$	5,906
	Loans collectively
	evaluated for
	impairment		18,794		-		8,483		34,167		198		2,097		5,355		69,094
Ending balance		$	23,863	$	-	$	8,483	$	34,979	$	213	$	2,107	$	5,355	$	75,000
Our recorded investment in loans as of March 31, 2014, December 31, 2013 and March 31, 2013 related to each balance in the allowance for loan losses by portfolio segment and disaggregated on the basis of our impairment methodology was as follows (in thousands):
31-Mar-14
		Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment		$	29,023	$	-	$	-	$	21,112	$	8	$	42	$	50,185
Loans collectively evaluated for impairment			5,176,492		2,688,044		1,437,609		2,208,237		14,807		95,220		11,620,409
Total		$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594
31-Dec-13
		Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment		$	15,139	$	-	$	705	$	24,028	$	54	$	50	$	39,976
Loans collectively evaluated for impairment			5,005,426		2,784,265		1,262,200		2,122,200		15,296		93,110		11,282,497
Total		$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
31-Mar-13
		Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment		$	23,353	$	-	$	729	$	30,991	$	37	$	69	$	55,179
Loans collectively evaluated for impairment			4,132,330		2,577,830		760,235		1,928,817		17,427		66,534		9,483,173
Total		$	4,155,683	$	2,577,830	$	760,964	$	1,959,808	$	17,464	$	66,603	$	9,538,352
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, 2013 generally consistent with improving portfolio credit metrics. We believe the level of unallocated reserves at March 31, 2014 is warranted due to the continued uncertain economic environment which has produced losses, including those resulting from fraud by borrowers, that are not necessarily correlated with historical loss trends or general economic conditions. Our methodology used to calculate the allowance considers historical losses, however, the historical loss rates for specific product types or credit risk grades may not fully incorporate the effects of continued weakness in the economy.
Generally we place loans on non-accrual when there is a clear indication that the borrower's cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining unpaid principal amount of the loan is deemed to be fully collectible. If collectability is questionable, then cash payments are applied to principal. As of March 31, 2014, 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 March 31, 2014 and December 31, 2013 (in thousands):
	March 31,		December 31,
	2014		2013
Commercial
Business loans	$	26,834	$	12,896
Construction
Market risk		-		705
Real estate
Market risk		9,624		15,607
Commercial		4,184		508
Secured by 1-4 family		2,521		2,555
Consumer		8		54
Leases		42		50
Total non-accrual loans	$	43,213	$	32,375
As of March 31, 2014, non-accrual loans included in the table above included $16.3 million related to loans that met the criteria for restructured compared to $17.8 million at December 31, 2013.
A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. In accordance with ASC 310 Receivables, we have also included all restructured loans in our impaired loan totals. The following tables detail our impaired loans, by portfolio class as of March 31, 2014 and December 31, 2013 (in thousands)
31-Mar-14
		Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	6,412	$	8,661	$	-	$	3,475	$	-
Energy		-		-		-		1,076		-
Construction
Market risk		-		-		-		470		-
Real estate
Market risk		8,159		8,159		-		11,736		-
Commercial		2,509		2,509		-		1,175		-
Secured by 1-4 family		1,320		1,320		-		1,320		-
Consumer		-		-		-		-		-
Leases		-		-		-		-		-
Total impaired loans with no allowance
recorded	$	18,400	$	20,649	$	-	$	19,252	$	-
With an allowance recorded:
Commercial
Business loans	$	21,235	$	21,235	$	5,331	$	14,451	$	-
Energy		1,376		4,306		698		765		-
Construction
Market risk		-		-		-		-		-
Real estate
Market risk		5,103		5,103		284		5,894		-
Commercial		1,675		1,675		395		558		-
Secured by 1-4 family		2,346		2,346		314		2,373		-
Consumer		8		8		1		39		-
Leases		42		42		6		47		-
Total impaired loans with an allowance
recorded	$	31,785	$	34,715	$	7,029	$	24,127	$	-
Combined:
Commercial
Business loans	$	27,647	$	29,896	$	5,331	$	17,926	$	-
Energy		1,376		4,306		698		1,841		-
Construction
Market risk		-		-		-		470		-
Real estate
Market risk		13,262		13,262		284		17,630		-
Commercial		4,184		4,184		395		1,733		-
Secured by 1-4 family		3,666		3,666		314		3,693		-
Consumer		8		8		1		39		-
Leases		42		42		6		47		-
Total impaired loans	$	50,185	$	55,364	$	7,029	$	43,379	$	-
31-Dec-13
		Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	2,005	$	2,005	$	-	$	4,265	$	-
Energy		1,614		3,443		-		969		-
Construction
Market risk		705		705		-		3,111		114
Real estate
Market risk		13,524		13,524		-		9,796		-
Commercial		508		508		-		5,458		-
Secured by 1-4 family		1,320		1,320		-		2,464		-
Consumer		-		-		-		-		-
Leases		-		-		-		-		-
Total impaired loans with no allowance
recorded	$	19,676	$	21,505	$	-	$	26,063	$	114
With an allowance recorded:
Commercial
Business loans	$	11,060	$	12,425	$	1,946	$	14,240	$	-
Energy		460		460		69		913		-
Construction
Market risk		-		-		-		160		-
Real estate
Market risk		6,289		6,289		822		7,912		-
Commercial		-		-		-		477		-
Secured by 1-4 family		2,387		2,387		321		914		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans with an allowance
recorded	$	20,300	$	21,665	$	3,174	$	24,731	$	-
Combined:
Commercial
Business loans	$	13,065	$	14,430	$	1,946	$	18,505	$	-
Energy		2,074		3,903		69		1,882		-
Construction
Market risk		705		705		-		3,271		114
Real estate
Market risk		19,813		19,813		822		17,708		-
Commercial		508		508		-		5,935		-
Secured by 1-4 family		3,707		3,707		321		3,378		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans	$	39,976	$	43,170	$	3,174	$	50,794	$	114
Average impaired loans outstanding during the three months ended March 31, 2014 and 2013 totaled $43.4 million and $62.6 million, respectively.
The table below provides an age analysis of our past due loans that are still accruing as of March 31, 2014 (in thousands):
					Greater
					Than 90
	30-59 Days		60-89 Days		Days and		Total Past
	Past Due		Past Due		Accruing(1)		Due		Current		Total
Commercial
Business loans	$	16,724	$	3,676	$	7,869	$	28,269	$	4,183,988	$	4,212,257
Energy		-		-		-		-		966,424		966,424
Mortgage finance loans		-		-		-		-		2,688,044		2,688,044
Construction
Market risk		3,462		-		-		3,462		1,417,795		1,421,257
Secured by 1-4 family		-		-		-		-		16,352		16,352
Real estate
Market risk		9,411		1,595		-		11,006		1,694,172		1,705,178
Commercial		13,908		501		-		14,409		403,167		417,576
Secured by 1-4 family		2,954		68		-		3,022		87,244		90,266
Consumer		10		-		-		10		14,797		14,807
Leases		685		-		-		685		94,535		95,220
Total loans held for investment	$	47,154	$	5,840	$	7,869	$	60,863	$	11,566,518	$	11,627,381
(1)       Loans past due 90 days and still accruing includes premium finance loans of $4.7 million. These loans are generally secured by obligations of insurance carriers to refund premiums on cancelled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.
Restructured loans are loans on which, due to the borrower's financial difficulties, we have granted a concession that we would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, or a reduction of the face amount of debt, or forgiveness of either principal or accrued interest. As of March 31, 2014 and December 31, 2013, we had $2.8 million and $1.9 million, respectively, in loans considered restructured that are not on non-accrual. These loans do not have unfunded commitments at March 31, 2014 or December 31, 2013. During the first quarter of 2014, a $930,000 restructured loan moved from non-accrual status to accrual status. Of the non-accrual loans at March 31, 2014 and December 31, 2013, $16.3 million and $17.8 million, respectively, met the criteria for restructured. These loans had no unfunded commitments at their respective balance sheet dates. A loan continues to qualify as restructured until a consistent payment history or change in borrower's financial condition has been evidenced, generally no less than twelve months. Assuming that the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that we are willing to accept for a new extension of credit with comparable risk, then the loan no longer has to be considered a restructuring if it is in compliance with modified terms in calendar years after the year of the restructure.
The following tables summarize, for the three months ended March 31, 2014 and 2013, loans that were restructured during 2014 and 2013 (in thousands):
31-Mar-14				Pre-Restructuring		Post-Restructuring
		Number of		Outstanding Recorded		Outstanding Recorded
		Contracts		Investment		Investment
Real estate - commercial		1		1,441		1,441
Total new restructured loans in 2014		1	$	1,441	$	1,441
31-Mar-13				Pre-Restructuring		Post-Restructuring
		Number of		Outstanding Recorded		Outstanding Recorded
		Restructured Loans		Investment		Investment
Commercial business loans		1	$	1,945	$	1,945
Total new restructured loans in 2013		1	$	1,945	$	1,945
The restructured loans generally include terms to temporarily place loans on interest only, extend the payment terms or reduce the interest rate. We did not forgive any principal on the above loans. The restructuring of the loans did not have a significant impact on our allowance for loan losses at March 31, 2014 or 2013.
The following table provides information on how restructured loans were modified during the three months ended March 31, 2014 and 2013 (in thousands):
	Three months ended March 31,
	2014		2013
Extended maturity	$	1,441	$	-
Combination of maturity extension and payment schedule adjustment		-		1,945
Total	$	1,441	$	1,945
As of March 31, 2014, we did not have any loans that were restructured within the last 12 months that subsequently defaulted. The following table summarizes, as of March 31, 2013, loans that were restructured within the last 12 months that subsequently defaulted (in thousands):
		Number of		Recorded
		Restructured Loans		Investment
Commercial - secured by real estate		1	$	814
Real estate - market risk		1		2,453
Total		2	$	3,267

OREO_and_Valuation_Allowance_f

OREO and Valuation Allowance for Losses on OREO	3 Months Ended
	Mar. 31, 2014
Real Estate Owned, Disclosure of Detailed Components [Abstract]	'
OREO and Valuation Allowance for Losses on OREO	'
	(5) OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO
	The table below presents a summary of the activity related to OREO (in thousands):
		Three months ended March 31,
			2014		2013
	Beginning balance	$	5,110	$	15,991
	Additions		851		-
	Sales		-3,541		-1,494
	Valuation allowance for OREO		-		-
	Direct write-downs		-		-71
	Ending balance	$	2,420	$	14,426

Financial_Instruments_with_Off

Financial Instruments with Off-Balance Sheet Risk	3 Months Ended
	Mar. 31, 2014
Risks and Uncertainties [Abstract]	'
Financial Instruments with Off-Balance Sheet Risk	'
	(6) FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK
	The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit which involve varying degrees of credit risk in excess of the amount recognized in the consolidated balance sheets. The Bank's exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of these instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management's credit evaluation of the borrower.
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer's credit-worthiness on a case-by-case basis.
	Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.
	The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands):
		31-Mar-14		31-Dec-13
	Commitments to extend credit	$	3,922,938	$	3,674,391
	Standby letters of credit		159,810		145,662

Regulatory_Restrictions

Regulatory Restrictions	3 Months Ended				9 Months Ended
	Mar. 31, 2014				Sep. 30, 2013
Regulatory Capital Requirements [Abstract]	'				'
Regulatory Restrictions	'				'
	(7) REGULATORY MATTERS				Dividends that may be paid by subsidiary banks are routinely restricted by various regulatory authorities. The amount that can be paid in any calendar year without prior approval of the Bank's regulatory agencies cannot exceed the lesser of the net profits (as defined) for that year plus the net profits for the preceding two calendar years, or retained earnings. The Basel III Capital Rules, effective for us on January 1, 2015, will further limit the amount of dividends that may be paid by our bank. No dividends were declared or paid on common stock during the three months ended March 31, 2014 or 2013.
	The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material effect on the Company's and the Bank's financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company's and the Bank's assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company's and the Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.				On March 28, 2013, we completed a sale of 6.0 million shares of 6.5% non-cumulative preferred stock, par value $0.01, with a liquidation preference of $25 per share, in a public offering. Dividends on the preferred stock are not cumulative and will be paid when declared by our board of directors to the extent that we have lawfully available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 6.50% per annum. We paid $2.4 million in dividends on the preferred stock for the three months ended March 31, 2014. Holders of preferred stock will not have voting rights, except with respect to authorizing or increasing the authorized amount of senior stock, certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. Net proceeds from the sale totaled $145.1 million. The additional equity was used for general corporate purposes, including funding regulatory capital infusions into the Bank.
	Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (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 March 31, 2014, that the Company and the Bank meet all capital adequacy requirements to which they are subject.				During January 2014, we completed an offering of 1.9 million shares of our common stock. Net proceeds from the sale totaled $106.5 million. On January 31, 2014, the Bank issued $175.0 million of subordinated notes in an offering to institutional investors exempt from registration under Section 3(a)(2) of the Securities Act of 1933 and 12 C.F.R. Part 16. Net proceeds from the transaction were $172.4 million. The notes mature in January 2026 and bear interest at a rate of 5.25% per annum, payable semi-annually. The notes are unsecured and are subordinate to the Bank's obligations to its deposits, its obligations under banker's acceptances and letters of credit, certain obligations to Federal Reserve Banks and the FDIC and the Bank's obligations to its other creditors, except any obligations which expressly rank on a parity with or junior to the notes. The notes are expected to qualify as Tier 2 capital for regulatory capital purposes, subject to applicable limitations. The net proceeds of both offerings were available to the Company for general corporate purposes, including retirement of $15.0 million of short-term debt that was outstanding at December 31, 2013, and additional capital to support continued loan growth.
	Financial institutions are categorized as well capitalized or adequately capitalized, based on minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios. As shown in the table below, the Company's capital ratios exceed the regulatory definition of adequately capitalized as of March 31, 2014 and 2013. Based upon the information in its most recently filed call report, the Bank meets the capital ratios necessary to be well capitalized. The regulatory authorities can apply changes in classification of assets and such change may retroactively subject the Company to change in capital ratios. Any such change could result in reducing one or more capital ratios below well-capitalized status. In addition, a change may result in imposition of additional assessments by the FDIC or could result in regulatory actions that could have a material effect on condition and results of operations.
	The table below summarizes our capital ratios:
			March 31,	December 31,
			2014	2013
	Company
	Risk-based capital:
		Tier 1 capital	9.85%	9.15%
		Total capital	12.70%	10.73%
	Leverage		11.57%	10.87%

Stockbased_Comensation

Stock-based Comensation	3 Months Ended
	Mar. 31, 2014
Compensation Related Costs [Abstract]	'
Employee Benefits	'
	(8) STOCK-BASED COMPENSATION
	The fair value of our stock option and stock appreciation right (“SAR”) grants are estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option valuation model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management's opinion, the existing models do not necessarily provide the best single measure of the fair value of our employee stock options.
	Stock-based compensation consists of SARs and RSUs granted from 2007 through 2013.
			Three months ended March 31,
	(in thousands)		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	143	$	148
		RSUs		1,119		757
	Total compensation expense recognized		$	1,262	$	905
			31-Mar-14
	(in thousands)		Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards		$	-	$	13,709
	Weighted average period over which expense is expected to be
		recognized, in years		-		3.75
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended March 31,
			2014		2013
	Cash-based performance units		$	3,393	$	1,039
			Three months ended March 31,
	(in thousands)		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	143	$	148
		RSUs		1,119		757
	Total compensation expense recognized		$	1,262	$	905
			31-Mar-14
	(in thousands)		Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards		$	-	$	13,709
	Weighted average period over which expense is expected to be
		recognized, in years		-		3.75
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended March 31,
			2014		2013
	Cash-based performance units		$	3,393	$	1,039

Discontinued_Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	(9) DISCONTINUED OPERATIONS
	Subsequent to the end of the first quarter of 2007, we and the purchaser of our residential mortgage loan division (“RML”) agreed to terminate and settle the contractual arrangements related to the sale of the division, which had been completed as of the end of the third quarter of 2006. Historical operating results of RML are reflected as discontinued operations in the financial statements.
	During the three months ended March 31, 2014 and 2013, the income and loss from discontinued operations was $4,000 and $1,000, net of taxes, respectively. We still have approximately $292,000 in loans held for sale from discontinued operations that are carried at the estimated market value at quarter-end, which is less than the original cost. We plan to sell these loans, but timing and price to be realized cannot be determined at this time due to market conditions. In addition, we continue to address requests from investors related to repurchasing loans previously sold. While the balances as of March 31, 2014 include a liability for exposure to additional contingencies, including the risk of having to repurchase loans previously sold, we recognize that market conditions may result in additional exposure to loss and the extension of time necessary to complete the discontinued mortgage operation.

Fair_Value_Disclosures

Fair Value Disclosures	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures	'
	(10) FAIR VALUE DISCLOSURES
	ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and 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.
	We determine the fair market values of our assets and liabilities measured at fair value on a recurring and nonrecurring basis using the fair value hierarchy as prescribed in ASC 820. The standard describes three levels of inputs that may be used to measure fair value as provided below.
	Level 1       Quoted prices in active markets for identical assets or liabilities.
	Level 2       Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include U.S. government and agency mortgage-backed debt securities, municipal bonds, and Community Reinvestment Act funds. This category includes derivative assets and liabilities where values are obtained from independent pricing services.
	Level 3       Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair values requires significant management judgment or estimation. This category 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 March 31, 2014 and December 31, 2013 are as follows (in thousands):
				Fair Value Measurements Using
	31-Mar-14			Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	38,674	$	-
		Municipals		-		7,006		-
		Equity securities(2)		-		7,280		-
	Loans(3) (5)			-		-		12,900
	OREO(4) (5)			-		-		2,420
	Derivative assets(6)			-		15,392		-
	Derivative liabilities(6)			-		-15,392		-
	31-Dec-13
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	41,462	$	-
		Municipals		-		14,505		-
		Equity securities(2)		-		7,247		-
	Loans(3) (5)			-		-		13,474
	OREO(4) (5)			-		-		5,110
	Derivative assets(6)			-		9,317		-
	Derivative liabilities(6)			-		-9,317		-
	Securities are measured at fair value on a recurring basis, generally monthly.
	Equity securities consist of Community Reinvestment Act funds.
	Includes impaired loans that have been measured for impairment at the fair value of the loan's collateral.
	OREO is transferred from loans to OREO at fair value less selling costs.
	Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions
	Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.
	Level 3 Valuations
	Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation. Currently, we measure fair value for certain loans and OREO on a nonrecurring basis as described below.
	Loans
	During the three months ended March 31, 2014, certain impaired loans were reevaluated and reported at fair value through a specific allocation of the allowance for loan losses based upon the fair value of the underlying collateral. The $12.9 million total above includes impaired loans at March 31, 2014 with a carrying value of $13.1 million that were reduced by specific allowance allocations totaling $200,000 for a total reported fair value of $12.9 million based on collateral valuations utilizing Level 3 valuation inputs. Fair values were based on third party appraisals; however, based on the current economic conditions, comparative sales data typically used in the appraisals may be unavailable or more subjective due to the lack of real estate market activity.
	OREO
	Certain foreclosed assets, upon initial recognition, are valued based on third party appraisals less estimated selling costs. At March 31, 2014, OREO had a carrying value of $2.4 million with no specific valuation allowance allocations for a total reported fair value of $2.4 million based on valuations utilizing Level 3 valuation inputs. Fair values are based on third party appraisals; however, based on the current economic conditions, comparative sales data typically used in the appraisals may be unavailable or more subjective due to the lack of real estate market activity.
	Fair Value of Financial Instruments
	Generally accepted accounting principles require disclosure of fair value information about financial instruments, whether or not recognized on the balance sheet, for which it is practical to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. This disclosure does not and is not intended to represent the fair value of the Company.
	A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands):
			31-Mar-14					31-Dec-13
			Carrying		Estimated			Carrying		Estimated
			Amount		Fair Value			Amount		Fair Value
	Cash and cash equivalents	$	257,799	$	257,799		$	153,911	$	153,911
	Securities, available-for-sale		52,960		52,960			63,214		63,214
	Loans held for sale from discontinued operations		292		292			294		294
	Loans held for investment, net		11,525,843		11,529,582			11,182,970		11,179,145
	Derivative assets		15,392		15,392			9,317		9,317
	Deposits		9,729,128		9,726,455			9,257,379		9,257,574
	Federal funds purchased		143,573		143,573			148,650		148,650
	Borrowings		534,453		534,453			876,980		861,981
	Subordinated notes		286,000		280,023			111,000		96,647
	Trust preferred subordinated debentures		113,406		113,406			113,406		113,406
	Derivative liabilities		15,392		15,392			9,317		9,317
	The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments:
	Cash and cash equivalents
	The carrying amounts reported in the consolidated balance sheet for cash and cash equivalents approximate their fair value, which is characterized as a Level 1 asset in the fair value hierarchy.
	Securities
	The fair value of investment securities is based on prices obtained from independent pricing services which are based on quoted market prices for the same or similar securities, which is characterized as a Level 2 asset in the fair value hierarchy. We have obtained documentation from the primary pricing service we use about their processes and controls over pricing. In addition, on a quarterly basis we independently verify the prices that we receive from the service provider using two additional independent pricing sources. Any significant differences are investigated and resolved.
	Loans, net
	Loans are characterized as Level 3 assets in the fair value hierarchy. For variable-rate loans that reprice frequently with no significant change in credit risk, fair values are generally based on carrying values. The fair value for all other loans is estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. The carrying amount of accrued interest approximates its fair value. The carrying amount of loans held for sale approximates fair value.
	Derivatives
The estimated fair value of the interest rate swaps are obtained from independent pricing services based on quote market prices for the same or similar derivative contracts and are characterized as a Level 2 asset in the fair value hierarchy. On a quarterly basis, we independently verify the fair value using an additional independent pricing source.
Deposits
Deposits are characterized as Level 3 liabilities in the fair value hierarchy. The carrying amounts for variable-rate money market accounts approximate their fair value. Fixed-term certificates of deposit fair values are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities.
Federal funds purchased, 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.

Derivative_Financial_Instrumen

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	(11) DERIVATIVE FINANCIAL INSTRUMENTS
	The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets.
	During 2014 and 2013, we entered into certain interest rate derivative positions that are not designated as hedging instruments. These derivative positions relate to transactions in which we enter into an interest rate swap, cap and/or floor with a customer while at the same time entering into an offsetting interest rate swap, cap and/or floor with another financial institution. In connection with each swap transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate. Because we act as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on our results of operations.
	The notional amounts and estimated fair values of interest rate derivative positions outstanding at March 31, 2014 and December 31, 2013 are presented in the following tables (in thousands):
			31-Mar-14				31-Dec-13
				Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
	Non-hedging interest rate derivative:
		Commercial loan/lease interest rate swaps	$	816,578	$	14,808	$	764,939	$	8,652
		Commercial loan/lease interest rate swaps		-816,578		-14,808		-764,939		-8,652
		Commercial loan/lease interest rate caps		-35,273		-584		-58,706		-665
		Commercial loan/lease interest rate caps		35,273		584		58,706		665
	The weighted-average receive and pay interest rates for interest rate swaps outstanding at March 31, 2014 were as follows:
		31-Mar-14		31-Dec-13
		Weighted-Average Interest Rate		Weighted-Average Interest Rate
		Received	Paid	Received	Paid
	Non-hedging interest rate swaps	4.87%	2.89%	4.89%	2.99%
	The weighted-average strike rate for outstanding interest rate caps was 1.45% at March 31, 2014 and 1.87% at December 31, 2013.
	Our credit exposure on interest rate swaps and caps is limited to the net favorable value and interest payments of all swaps and caps by each counterparty. In such cases collateral may be required from the counterparties involved if the net value of the swaps and caps exceeds a nominal amount considered to be immaterial. Our credit exposure, net of any collateral pledged, relating to interest rate swaps and caps was approximately $15.4 million at March 31, 2014 and approximately $9.3 million at December 31, 2013, all of which relates to bank customers. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap and cap values. At March 31, 2014 and December 31, 2013, we had $18.5 million and $10.7 million, respectively, in cash collateral pledged for these derivatives included in interest-bearing deposits.

Stockholders_Equity

Stockholder's Equity	3 Months Ended
	Mar. 31, 2014
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	(12) STOCKHOLDERS' EQUITY
	On March 28, 2013, we completed a sale of 6.0 million shares of 6.5% non-cumulative preferred stock, par value $0.01, with a liquidation preference of $25 per share, in a public offering. Dividends on the preferred stock are not cumulative and will be paid if and when declared by our board of directors to the extent that we have lawfully available funds to pay dividends. If declared, dividends will accrue and be payable quarterly, in arrears, on the liquidation preference amount, on a non-cumulative basis, at a rate of 6.50% per annum. We paid $2.4 million in dividends on the preferred stock in March 2014. Holders of preferred stock do not have voting rights, except with respect to authorizing or increasing the authorized amount of senior stock, certain changes in the terms of the preferred stock, certain dividend non-payments and as otherwise required by applicable law. Net proceeds from the sale totaled $145.0 million. The proceeds were used for general corporate purposes, including funding regulatory capital infusions into the Bank.
	During January 2014, we completed an offering of 1.9 million shares of our common stock. Net proceeds from the sale totaled $106.5 million. The net proceeds of the offering were available to the Company for general corporate purposes, including retirement of $15.0 million of short-term debt that was outstanding at December 31, 2013, and additional capital to support continued loan growth.

New_Accounting_Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
New Accounting Standards	'
	(13) NEW ACCOUNTING PRONOUNCEMENTS
	ASU 2014-04 “Receivables (Topic 310) – Troubled Debt Restructurings by Creditors” (“ASU 2014-04”) amends Topic 310 “Receivables” to clarify the terms defining when an in substance repossession or foreclosure occurs, which determines when the receivable should be derecognized and the real estate property is recognized. ASU 2013-04 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2014. It is not expected to have a significant impact on our financial statements.

Summary_of_Significant_Account

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Nature of Business	'
	Organization and Nature of Business
	Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional or national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas.
Basis of Presentation	'
	Basis of Presentation
	Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.
	The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2013, included in our Annual Report on Form 10-K filed with the SEC on February 20, 2014 (the “2013 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.
Correction of an Error in the Financial Statements	'
	Correction of an Error in the Financial Statements
	We determined during the fourth quarter of 2013 that purchases and sales of mortgage finance loan interests that had been reported on our consolidated statements of cash flows as cash flows from operating activities should have been reported as investing activities because the related asset balances should have been reported as held for investment rather than held for sale on our consolidated balance sheets.
	We have corrected the classification of these assets on the consolidated balance sheets to reflect them as held for investment. We have corrected the previously presented cash flows for these loans and in doing so the consolidated statements of cash flows for the three months ended March 31, 2013 were adjusted to decrease net cash flows from operating activities by $597.4 million, with a corresponding increase in net cash flows from investing activities. The change does not impact our reported earnings as we do not believe any reserve for loan losses relating to the mortgage finance portfolio is necessary based upon the risk profile of the assets and the less than one basis point loss experience of the program over the last ten years. This reclassification does not change total loans or total assets on our consolidated balance sheets. We have evaluated the effect of the incorrect presentation, both qualitatively and quantitatively, and concluded that it did not materially misstate our previously issued financial statements.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash equivalents include amounts due from banks 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 March 31, 2014 and December 31, 2013.
Allowance for Loan Losses	'
	Allowance for Loan Losses
	The allowance for loan losses is established through a provision for loan losses charged against income. The allowance for loan losses includes specific reserves for impaired loans and a general reserve for estimated losses inherent in the loan portfolio at the balance sheet date, but not yet identified with specific loans. Loans deemed to be uncollectible are charged against the allowance when management believes that the collectibility of the principal is unlikely and subsequent recoveries, if any, are credited to the allowance. Management's periodic evaluation of the adequacy of the allowance is based on an assessment of the current loan portfolio, including known inherent risks, adverse situations that may affect the borrowers' ability to repay, the estimated value of any underlying collateral and current economic conditions.
Other Real Estate Owned	'
	Other Real Estate Owned
	Other real estate owned (“OREO”), which is included in other assets on the balance sheet, consists of real estate that has been foreclosed. Real estate that has been foreclosed is recorded at the fair value of the real estate, less selling costs, through a charge to the allowance for loan losses, if necessary. Subsequent write-downs required for declines in value are recorded through a valuation allowance, or taken directly to the asset, charged to other non-interest expense.
Premises and Equipment	'
	Premises and Equipment
	Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from three to ten years. Gains or losses on disposals of premises and equipment are included in results of operations.
Marketing and Software	'
	Marketing and Software
	Marketing costs are expensed as incurred. Ongoing maintenance and enhancements of websites are expensed as incurred. Costs incurred in connection with development or purchase of internal use software are capitalized and amortized over a period not to exceed five years. Internal use software costs are included in other assets in the consolidated financial statements.
Goodwill and Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Our intangible assets relate primarily to loan customer relationships. Intangible assets with definite useful lives are amortized on an accelerated basis over their estimated life. Intangible assets are tested for impairment annually or whenever events or changes in circumstances indicate the carrying amount of the assets may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
Segment Reporting	'
	Segment Reporting
	We have determined that all of our lending divisions and subsidiaries meet the aggregation criteria of ASC 280, Segment Reporting, since all offer similar products and services, operate with similar processes, and have similar customers.
Stock-based Compensation	'
	Stock-based Compensation
	We account for all stock-based compensation transactions in accordance with ASC 718, Compensation – Stock Compensation (“ASC 718”), which requires that stock compensation transactions be recognized as compensation expense in the statement of operations based on their fair values on the measurement date, which is the date of the grant.
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income
	Unrealized gains or losses on our available-for-sale securities (after applicable income tax expense or benefit) are included in accumulated other comprehensive income, net. Other comprehensive loss, net of tax, for the three months ended March 31, 2014 and 2013 is reported in the accompanying consolidated statements of changes in stockholders' equity and consolidated statements of income and other comprehensive income.
Income Taxes	'
	Income Taxes
	The Company and its subsidiary file a consolidated federal income tax return. We utilize the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based upon the difference between the values of the assets and liabilities as reflected in the financial statements and their related tax basis using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled. As changes in tax law or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. A valuation reserve is provided against deferred tax assets unless it is more likely than not that such deferred tax assets will be realized.
Basic and Diluted Earnings Per Common Share	'
	Basic and Diluted Earnings Per Common Share
	Basic earnings per common share is based on net income available to common stockholders divided by the weighted-average number of common shares outstanding during the period excluding non-vested stock awards. Diluted earnings per common share include the dilutive effect of stock options and non-vested stock awards using the treasury stock method. A reconciliation of the weighted-average shares used in calculating basic earnings per common share and the weighted average common shares used in calculating diluted earnings per common share for the reported periods is provided in Note 2 – Earnings Per Common Share.
Fair Values of Financial Instruments	'
	Fair Values of Financial Instruments
	ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and enhances disclosures about fair value measurements. In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Schedule of computation of basic and diluted earnings per share	'
				Three months ended March 31,
					2014		2013
	Numerator:
		Net income from continuing operations		$	28,261	$	33,144
		Preferred stock dividends			2,438		81
		Net income from continuing operations available to common shareholders			25,823		33,063
		Income (loss) from discontinued operations			4		-1
		Net income		$	25,827	$	33,062
	Denominator:
		Denominator for basic earnings per share - weighted average shares			42,298,355		40,473,857
		Effect of employee stock-based awards(1)			381,597		456,996
		Effect of warrants to purchase common stock			540,009		498,391
		Denominator for dilutive earnings per share - adjusted weighted average
			shares and assumed conversions		43,219,961		41,429,244
	Basic earnings per common share from continuing operations			$	0.61	$	0.82
	Basic earnings per common share			$	0.61	$	0.82
	Diluted earnings per share from continuing operations			$	0.6	$	0.8
	Diluted earnings per common share			$	0.6	$	0.8

Securities_Tables

Securities (Tables)	3 Months Ended
	Mar. 31, 2014															Mar. 31, 2013
Available-for-sale Securities [Abstract]	'															'
Schedule of summary of securities	'															'
	The following is a summary of securities (in thousands):
					31-Mar-14
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	36,131	$	2,543	$	-	$	38,674
		Municipals			6,964		42		-		7,006
		Equity securities(1)			7,522		-		-242		7,280
				$	50,617	$	2,585	$	-242	$	52,960
					31-Dec-13
							Gross		Gross		Estimated
					Amortized		Unrealized		Unrealized		Fair
					Cost		Gains		Losses		Value
	Available-for-Sale Securities:
		Residential mortgage-backed securities		$	38,786	$	2,676	$	-	$	41,462
		Municipals			14,401		104		-		14,505
		Equity securities(1)			7,522		-		-275		7,247
				$	60,709	$	2,780	$	-275	$	63,214
Schedule of amortized cost and estimated fair value of securities	'															'
																				31-Mar-14
																						After One		After Five
																				Less Than		Through		Through		After Ten
																				One Year		Five Years		Ten Years		Years		Total
																Available-for-sale:
																	Residential mortgage-backed
																		securities:(1)
																		Amortized cost	$	78	$	13,301	$	7,136	$	15,616	$	36,131
																		Estimated fair value		82		14,132		7,863		16,597		38,674
																		Weighted average yield(3)		4.69%		4.78%		5.55%		2.40%		3.90%
																	Municipals:(2)
																		Amortized cost		4,648		2,316		-		-		6,964
																		Estimated fair value		4,681		2,325		-		-		7,006
																		Weighted average yield(3)		6.00%		5.75%		-		-		5.92%
																	Equity securities:(4)
																		Amortized cost		7,522		-		-		-		7,522
																		Estimated fair value		7,280		-		-		-		7,280
																	Total available-for-sale securities:
																		Amortized cost									$	50,617
																		Estimated fair value									$	52,960
																				31-Dec-13
																						After One		After Five
																				Less Than		Through		Through		After Ten
																				One Year		Five Years		Ten Years		Years		Total
																Available-for-sale:
																	Residential mortgage-backed
																		securities:(1)
																		Amortized cost	$	238	$	14,720	$	7,718	$	16,110	$	38,786
																		Estimated fair value		252		15,641		8,456		17,113		41,462
																		Weighted average yield(3)		4.32%		4.78%		5.56%		2.40%		3.94%
																	Municipals:(2)
																		Amortized cost		7,749		6,652		-		-		14,401
																		Estimated fair value		7,818		6,687		-		-		14,505
																		Weighted average yield(3)		5.76%		5.71%		-		-		5.73%
																	Equity securities:(4)
																		Amortized cost		7,522		-		-		-		7,522
																		Estimated fair value		7,247		-		-		-		7,247
																	Total available-for-sale securities:
																		Amortized cost									$	60,709
																		Estimated fair value									$	63,214
Schedule of investment securities that have been in a continuous unrealized loss position for less or more than 12 months	'															'
	31-Mar-14	Less Than 12 Months					12 Months or Longer					Total
		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
	Equity securities	$	1,019	$	-3		$	6,261	$	-239		$	7,280	$	-242
	31-Dec-13	Less Than 12 Months					12 Months or Longer					Total
		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
	Equity securities	$	7,247	$	-275		$	-	$	-		$	7,247	$	-275

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	3 Months Ended																		9 Months Ended
	Mar. 31, 2014																		Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]	'																		'
Schedule of loans held for investments	'																		'
																			(4) LOANS AND ALLOWANCE FOR LOAN LOSSES
																			At March 31, 2014 and December 31, 2013, loans were as follows (in thousands):
																					March 31,		December 31,
																					2014		2013
																			Commercial	$	5,205,515	$	5,020,565
																			Mortgage finance		2,688,044		2,784,265
																			Construction		1,437,609		1,262,905
																			Real estate		2,229,349		2,146,228
																			Consumer		14,815		15,350
																			Leases		95,262		93,160
																			Gross loans held for investment		11,670,594		11,322,473
																			Deferred income (net of direct origination costs)		-54,517		-51,899
																			Allowance for loan losses		-90,234		-87,604
																			Total	$	11,525,843	$	11,182,970
Schedule of the credit risk profile of loan portfolio by internally assigned grades and nonaccrual status	'																		'
	31-Mar-14
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	5,086,156	$	2,688,044	$	1,437,383	$	2,184,419	$	14,747	$	92,054	$	11,502,803
		Special mention		33,212		-		123		7,334		-		203		40,872
		Substandard-accruing		59,313		-		103		21,267		60		2,963		83,706
		Non-accrual		26,834		-		-		16,329		8		42		43,213
	Total loans held for
		investment	$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594
	31-Dec-13
				Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Grade:
		Pass	$	4,908,944	$	2,784,265	$	1,261,995	$	2,099,450	$	15,251	$	89,317	$	11,159,222
		Special mention		24,132		-		102		6,338		-		51		30,623
		Substandard-accruing		74,593		-		103		21,770		45		3,742		100,253
		Non-accrual		12,896		-		705		18,670		54		50		32,375
	Total loans held for
		investment	$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
Schedule of activity in the reserve for loan losses by portfolio segment	'																		'
	31-Mar-14
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance		$	39,868	$	-	$	14,553	$	24,210	$	149	$	3,105	$	5,719	$	87,604
	Provision for loan
		losses		6,245		-		583		-495		56		-575		-1,104		4,710
	Charge-offs			2,336		-		-		-		61		50		-		2,447
	Recoveries			210		-		-		8		25		124		-		367
	Net charge-offs
		(recoveries)		2,126		-		-		-8		36		-74		-		2,080
	Ending balance		$	43,987	$	-	$	15,136	$	23,723	$	169	$	2,604	$	4,615	$	90,234
	Period end amount allocated to:
		Loans individually
		evaluated for
		impairment	$	6,029	$	-	$	-	$	993	$	1	$	6	$	-	$	7,029
		Loans collectively
		evaluated for
		impairment		37,958		-		15,136		22,730		168		2,598		4,615		83,205
	Ending balance		$	43,987	$	-	$	15,136	$	23,723	$	169	$	2,604	$	4,615	$	90,234
	31-Mar-13
	(in thousands)			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Unallocated		Total
	Beginning balance		$	21,547	$	-	$	12,097	$	30,893	$	226	$	2,460	$	7,114	$	74,337
	Provision for loan
		losses		3,567		-		-3,614		4,183		-24		-474		-1,759		1,879
	Charge-offs			1,648		-		-		105		19		-		-		1,772
	Recoveries			397		-		-		8		30		121		-		556
	Net charge-offs
		(recoveries)		1,251		-		-		97		-11		-121		-		1,216
	Ending balance		$	23,863	$	-	$	8,483	$	34,979	$	213	$	2,107	$	5,355	$	75,000
	Period end amount allocated to:
		Loans individually
		evaluated for
		impairment	$	5,069	$	-	$	-	$	812	$	15	$	10	$	-	$	5,906
		Loans collectively
		evaluated for
		impairment		18,794		-		8,483		34,167		198		2,097		5,355		69,094
	Ending balance		$	23,863	$	-	$	8,483	$	34,979	$	213	$	2,107	$	5,355	$	75,000
Schedule Of Financing Receivables Related To Allowance For Loan Losses By Portfolio Category Disaggregated Based On Impairment Methodology [Table Text Block]	'																		'
	31-Mar-14
			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Loans individually evaluated for impairment		$	29,023	$	-	$	-	$	21,112	$	8	$	42	$	50,185
	Loans collectively evaluated for impairment			5,176,492		2,688,044		1,437,609		2,208,237		14,807		95,220		11,620,409
	Total		$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594
	31-Dec-13
			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Loans individually evaluated for impairment		$	15,139	$	-	$	705	$	24,028	$	54	$	50	$	39,976
	Loans collectively evaluated for impairment			5,005,426		2,784,265		1,262,200		2,122,200		15,296		93,110		11,282,497
	Total		$	5,020,565	$	2,784,265	$	1,262,905	$	2,146,228	$	15,350	$	93,160	$	11,322,473
	31-Mar-13
			Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
	Loans individually evaluated for impairment		$	23,353	$	-	$	729	$	30,991	$	37	$	69	$	55,179
	Loans collectively evaluated for impairment			4,132,330		2,577,830		760,235		1,928,817		17,427		66,534		9,483,173
	Total		$	4,155,683	$	2,577,830	$	760,964	$	1,959,808	$	17,464	$	66,603	$	9,538,352
Schedule of non-accrual loans by type and purpose	'																		'
		March 31,		December 31,
		2014		2013
	Commercial
	Business loans	$	26,834	$	12,896
	Construction
	Market risk		-		705
	Real estate
	Market risk		9,624		15,607
	Commercial		4,184		508
	Secured by 1-4 family		2,521		2,555
	Consumer		8		54
	Leases		42		50
	Total non-accrual loans	$	43,213	$	32,375
Schedule of impaired loans, by portfolio class	'																		'
	31-Mar-14
			Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	With no related allowance recorded:
	Commercial
	Business loans	$	6,412	$	8,661	$	-	$	3,475	$	-
	Energy		-		-		-		1,076		-
	Construction
	Market risk		-		-		-		470		-
	Real estate
	Market risk		8,159		8,159		-		11,736		-
	Commercial		2,509		2,509		-		1,175		-
	Secured by 1-4 family		1,320		1,320		-		1,320		-
	Consumer		-		-		-		-		-
	Leases		-		-		-		-		-
	Total impaired loans with no allowance
	recorded	$	18,400	$	20,649	$	-	$	19,252	$	-
	With an allowance recorded:
	Commercial
	Business loans	$	21,235	$	21,235	$	5,331	$	14,451	$	-
	Energy		1,376		4,306		698		765		-
	Construction
	Market risk		-		-		-		-		-
	Real estate
	Market risk		5,103		5,103		284		5,894		-
	Commercial		1,675		1,675		395		558		-
	Secured by 1-4 family		2,346		2,346		314		2,373		-
	Consumer		8		8		1		39		-
	Leases		42		42		6		47		-
	Total impaired loans with an allowance
	recorded	$	31,785	$	34,715	$	7,029	$	24,127	$	-
	Combined:
	Commercial
	Business loans	$	27,647	$	29,896	$	5,331	$	17,926	$	-
	Energy		1,376		4,306		698		1,841		-
	Construction
	Market risk		-		-		-		470		-
	Real estate
	Market risk		13,262		13,262		284		17,630		-
	Commercial		4,184		4,184		395		1,733		-
	Secured by 1-4 family		3,666		3,666		314		3,693		-
	Consumer		8		8		1		39		-
	Leases		42		42		6		47		-
	Total impaired loans	$	50,185	$	55,364	$	7,029	$	43,379	$	-
	31-Dec-13
			Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
	With no related allowance recorded:
	Commercial
	Business loans	$	2,005	$	2,005	$	-	$	4,265	$	-
	Energy		1,614		3,443		-		969		-
	Construction
	Market risk		705		705		-		3,111		114
	Real estate
	Market risk		13,524		13,524		-		9,796		-
	Commercial		508		508		-		5,458		-
	Secured by 1-4 family		1,320		1,320		-		2,464		-
	Consumer		-		-		-		-		-
	Leases		-		-		-		-		-
	Total impaired loans with no allowance
	recorded	$	19,676	$	21,505	$	-	$	26,063	$	114
	With an allowance recorded:
	Commercial
	Business loans	$	11,060	$	12,425	$	1,946	$	14,240	$	-
	Energy		460		460		69		913		-
Construction
Market risk		-		-		-		160		-
Real estate
Market risk		6,289		6,289		822		7,912		-
Commercial		-		-		-		477		-
Secured by 1-4 family		2,387		2,387		321		914		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans with an allowance
recorded	$	20,300	$	21,665	$	3,174	$	24,731	$	-
Combined:
Commercial
Business loans	$	13,065	$	14,430	$	1,946	$	18,505	$	-
Energy		2,074		3,903		69		1,882		-
Construction
Market risk		705		705		-		3,271		114
Real estate
Market risk		19,813		19,813		822		17,708		-
Commercial		508		508		-		5,935		-
Secured by 1-4 family		3,707		3,707		321		3,378		-
Consumer		54		54		8		43		-
Leases		50		50		8		72		-
Total impaired loans	$	39,976	$	43,170	$	3,174	$	50,794	$	114
Schedule of an age analysis of accruing past due loans	'																		'
						Greater
						Than 90
		30-59 Days		60-89 Days		Days and		Total Past
		Past Due		Past Due		Accruing(1)		Due		Current		Total
	Commercial
	Business loans	$	16,724	$	3,676	$	7,869	$	28,269	$	4,183,988	$	4,212,257
	Energy		-		-		-		-		966,424		966,424
	Mortgage finance loans		-		-		-		-		2,688,044		2,688,044
	Construction
	Market risk		3,462		-		-		3,462		1,417,795		1,421,257
	Secured by 1-4 family		-		-		-		-		16,352		16,352
	Real estate
	Market risk		9,411		1,595		-		11,006		1,694,172		1,705,178
	Commercial		13,908		501		-		14,409		403,167		417,576
	Secured by 1-4 family		2,954		68		-		3,022		87,244		90,266
	Consumer		10		-		-		10		14,797		14,807
	Leases		685		-		-		685		94,535		95,220
	Total loans held for investment	$	47,154	$	5,840	$	7,869	$	60,863	$	11,566,518	$	11,627,381
Schedule of loans that have been restructured	'																		'
	31-Mar-14				Pre-Restructuring		Post-Restructuring
			Number of		Outstanding Recorded		Outstanding Recorded
			Contracts		Investment		Investment
	Real estate - commercial		1		1,441		1,441
	Total new restructured loans in 2014		1	$	1,441	$	1,441
	31-Mar-13				Pre-Restructuring		Post-Restructuring
			Number of		Outstanding Recorded		Outstanding Recorded
			Restructured Loans		Investment		Investment
	Commercial business loans		1	$	1,945	$	1,945
	Total new restructured loans in 2013		1	$	1,945	$	1,945
		Three months ended March 31,
		2014		2013
	Extended maturity	$	1,441	$	-
	Combination of maturity extension and payment schedule adjustment		-		1,945
	Total	$	1,441	$	1,945
			Number of		Recorded
			Restructured Loans		Investment
	Commercial - secured by real estate		1	$	814
	Real estate - market risk		1		2,453
	Total		2	$	3,267

OREO_and_Valuation_Allowance_f1

OREO and Valuation Allowance for Losses on OREO (Tables)	3 Months Ended
	Mar. 31, 2014
Real Estate Owned, Disclosure of Detailed Components [Abstract]	'
Schedule of the activity related to OREO	'
	(5) OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO
	The table below presents a summary of the activity related to OREO (in thousands):
		Three months ended March 31,
			2014		2013
	Beginning balance	$	5,110	$	15,991
	Additions		851		-
	Sales		-3,541		-1,494
	Valuation allowance for OREO		-		-
	Direct write-downs		-		-71
	Ending balance	$	2,420	$	14,426

Financial_Instruments_with_Off1

Financial Instruments with Off-Balance Sheet Risk (Tables)	3 Months Ended
	Mar. 31, 2014
Risks and Uncertainties [Abstract]	'
Schedule of financial instruments with off-balance sheet risk	'
		31-Mar-14		31-Dec-13
	Commitments to extend credit	$	3,922,938	$	3,674,391
	Standby letters of credit		159,810		145,662

Regulatory_Restrictions_Tables

Regulatory Restrictions (Tables)	3 Months Ended
	Mar. 31, 2014
Regulatory Capital Requirements [Abstract]	'
Schedule of compliance with Regulatory Capital Requirements	'
			March 31,	December 31,
			2014	2013
	Company
	Risk-based capital:
		Tier 1 capital	9.85%	9.15%
		Total capital	12.70%	10.73%
	Leverage		11.57%	10.87%

Stockbased_Compensation_Tables

Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
Compensation Related Costs [Abstract]	'
Schedule of share-based compensation expense	'
	(8) STOCK-BASED COMPENSATION
	The fair value of our stock option and stock appreciation right (“SAR”) grants are estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option valuation model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management's opinion, the existing models do not necessarily provide the best single measure of the fair value of our employee stock options.
	Stock-based compensation consists of SARs and RSUs granted from 2007 through 2013.
			Three months ended March 31,
	(in thousands)		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	143	$	148
		RSUs		1,119		757
	Total compensation expense recognized		$	1,262	$	905
			31-Mar-14
	(in thousands)		Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards		$	-	$	13,709
	Weighted average period over which expense is expected to be
		recognized, in years		-		3.75
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended March 31,
			2014		2013
	Cash-based performance units		$	3,393	$	1,039
			Three months ended March 31,
	(in thousands)		2014		2013
	Stock- based compensation expense recognized:
		SARs	$	143	$	148
		RSUs		1,119		757
	Total compensation expense recognized		$	1,262	$	905
			31-Mar-14
	(in thousands)		Options		SARs and RSUs
	Unrecognized compensation expense related to unvested awards		$	-	$	13,709
	Weighted average period over which expense is expected to be
		recognized, in years		-		3.75
	In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units.
	A summary of the compensation cost for these units is as follows (in thousands):
			Three months ended March 31,
			2014		2013
	Cash-based performance units		$	3,393	$	1,039

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities measured at fair value on a recurring and nonrecurring basis	'
				Fair Value Measurements Using
	31-Mar-14			Level 1		Level 2		Level 3
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	38,674	$	-
		Municipals		-		7,006		-
		Equity securities(2)		-		7,280		-
	Loans(3) (5)			-		-		12,900
	OREO(4) (5)			-		-		2,420
	Derivative assets(6)			-		15,392		-
	Derivative liabilities(6)			-		-15,392		-
	31-Dec-13
	Available for sale securities:(1)
		Residential mortgage-backed securities	$	-	$	41,462	$	-
		Municipals		-		14,505		-
		Equity securities(2)		-		7,247		-
	Loans(3) (5)			-		-		13,474
	OREO(4) (5)			-		-		5,110
	Derivative assets(6)			-		9,317		-
	Derivative liabilities(6)			-		-9,317		-
Schedule of a summary of the carrying amounts and estimated fair values of financial instruments	'
			31-Mar-14					31-Dec-13
			Carrying		Estimated			Carrying		Estimated
			Amount		Fair Value			Amount		Fair Value
	Cash and cash equivalents	$	257,799	$	257,799		$	153,911	$	153,911
	Securities, available-for-sale		52,960		52,960			63,214		63,214
	Loans held for sale from discontinued operations		292		292			294		294
	Loans held for investment, net		11,525,843		11,529,582			11,182,970		11,179,145
	Derivative assets		15,392		15,392			9,317		9,317
	Deposits		9,729,128		9,726,455			9,257,379		9,257,574
	Federal funds purchased		143,573		143,573			148,650		148,650
	Borrowings		534,453		534,453			876,980		861,981
	Subordinated notes		286,000		280,023			111,000		96,647
	Trust preferred subordinated debentures		113,406		113,406			113,406		113,406
	Derivative liabilities		15,392		15,392			9,317		9,317

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of notional amounts and estimated fair values of interest rate derivatives	'
			31-Mar-14				31-Dec-13
				Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
	Non-hedging interest rate derivative:
		Commercial loan/lease interest rate swaps	$	816,578	$	14,808	$	764,939	$	8,652
		Commercial loan/lease interest rate swaps		-816,578		-14,808		-764,939		-8,652
		Commercial loan/lease interest rate caps		-35,273		-584		-58,706		-665
		Commercial loan/lease interest rate caps		35,273		584		58,706		665
Schedule of the weighted-average receive and pay interest rate swaps	'
		31-Mar-14		31-Dec-13
		Weighted-Average Interest Rate		Weighted-Average Interest Rate
		Received	Paid	Received	Paid
	Non-hedging interest rate swaps	4.87%	2.89%	4.89%	2.99%

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2012
Numerator:	'	'	'
Net income from continuing operations	$28,261	$33,144	$33,144
Preferred stock dividends	2,438	81	'
Net income from continuing operations available to common shareholders	25,823	33,063	'
Income (loss) from discontinued operations	4	-1	'
Net income available to common shareholders	$25,827	$33,062	'
Denominator:	'	'	'
Denominator for basic earnings per share - weighted average shares	42,298,355	40,473,857	'
Effect of employee stock-based awards	381,597	456,996	'
Effect of warrants to purchase common stock	540,009	498,391	'
Denominator for dilutive earnings per share - adjusted weighted average shares and assumed conversions	43,219,961	41,429,244	'
Basic earnings per common share from continuing operations	$0.61	$0.82	'
Basic earnings per common share	$0.61	$0.82	'
Diluted earnings per share from continuing operations	$0.60	$0.80	'
Diluted earnings per common share	$0.60	$0.80	'
Stock options exluded from computation of EPS	23,000	46,500	'

Securities_Details

Securities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities [Abstract]	'	'
Available-for-sale Securities, Gross Unrealized Gains	$2,585	$2,780
Available for Sale Securities, net unrealized gain as percent of amortized cost	4.63%	4.13%
Summary of Available-for-Sale Securities	'	'
Amortized Cost	50,617	60,709
Gross Unrealized Gains	2,585	2,780
Gross Unrealized Losses	242	275
Estimated Fair Value	52,960	63,214
Residential mortgage-backed securities	'	'
Available-for-sale Securities [Abstract]	'	'
Available-for-sale Securities, Gross Unrealized Gains	2,543	2,676
Summary of Available-for-Sale Securities	'	'
Amortized Cost	36,131	38,786
Gross Unrealized Gains	2,543	2,676
Gross Unrealized Losses	0	0
Estimated Fair Value	38,674	41,462
Municipals	'	'
Available-for-sale Securities [Abstract]	'	'
Available-for-sale Securities, Gross Unrealized Gains	42	104
Summary of Available-for-Sale Securities	'	'
Amortized Cost	6,964	14,401
Gross Unrealized Gains	42	104
Gross Unrealized Losses	0	0
Estimated Fair Value	7,006	14,505
Equity securities	'	'
Available-for-sale Securities [Abstract]	'	'
Available-for-sale Securities, Gross Unrealized Gains	0	0
Summary of Available-for-Sale Securities	'	'
Amortized Cost	7,522	7,522
Gross Unrealized Gains	0	0
Gross Unrealized Losses	242	275
Estimated Fair Value	$7,280	$7,247

Securities_Details_1

Securities (Details 1) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Available-for-sale Securities, Amortized Cost Basis, Total	$50,617,000	$60,709,000
Estimated Fair Value	52,960,000	63,214,000
Weighted average yield, Total	3.90%	'
Available-for-sale Securities, Other Disclosure Items	'	'
Federal Tax Rate	35.00%	'
Available-for-sale Securities Pledged as Collateral	40,700,000	'
Residential mortgage-backed securities	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Amortized cost, Less Than One Year	78,000	238,000
Amortized cost, After One Through Five Years	13,301,000	14,720,000
Amortized cost, After Five Through Ten Years	7,136,000	7,718,000
Amortized cost, After Ten Years	15,616,000	16,110,000
Available-for-sale Securities, Amortized Cost Basis, Total	36,131,000	38,786,000
Estimated fair value, Less Than One Year	82,000	252,000
Estimated fair value, After One Through Five Years	14,132,000	15,641,000
Estimated fair value, After Five Through Ten Years	7,863,000	8,456,000
Estimated fair value, After Ten Years	16,597,000	17,113,000
Estimated Fair Value	38,674,000	41,462,000
Weighted average yield, Less Than One Year	4.69%	4.32%
Weighted average yield, After One Through Five Years	4.78%	4.78%
Weighted average yield, After Five Through Ten Years	5.55%	5.56%
Weighted average yield, After Ten Years	2.40%	2.40%
Weighted average yield, Total	'	3.94%
Municipals	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Amortized cost, Less Than One Year	4,648,000	7,749,000
Amortized cost, After One Through Five Years	2,316,000	6,652,000
Amortized cost, After Five Through Ten Years	0	0
Amortized cost, After Ten Years	0	0
Available-for-sale Securities, Amortized Cost Basis, Total	6,964,000	14,401,000
Estimated fair value, Less Than One Year	4,681,000	7,818,000
Estimated fair value, After One Through Five Years	2,325,000	6,687,000
Estimated fair value, After Five Through Ten Years	0	0
Estimated fair value, After Ten Years	0	0
Estimated Fair Value	7,006,000	14,505,000
Weighted average yield, Less Than One Year	6.00%	5.76%
Weighted average yield, After One Through Five Years	5.75%	5.71%
Weighted average yield, After Five Through Ten Years	0.00%	0.00%
Weighted average yield, After Ten Years	0.00%	0.00%
Weighted average yield, Total	5.92%	5.73%
Equity securities	'	'
The amortized cost and fair value of available-for-sale securites by maturity	'	'
Amortized cost, Less Than One Year	7,522,000	7,522,000
Amortized cost, After One Through Five Years	0	0
Amortized cost, After Five Through Ten Years	0	0
Amortized cost, After Ten Years	0	0
Available-for-sale Securities, Amortized Cost Basis, Total	7,522,000	7,522,000
Estimated fair value, Less Than One Year	7,280,000	7,247,000
Estimated fair value, After One Through Five Years	0	0
Estimated fair value, After Five Through Ten Years	0	0
Estimated fair value, After Ten Years	0	0
Estimated Fair Value	7,280,000	7,247,000
Deposits	'	'
Available-for-sale Securities, Other Disclosure Items	'	'
Available-for-sale Securities Pledged as Collateral	8,600,000	'
Customer repurchase agreements	'	'
Available-for-sale Securities, Other Disclosure Items	'	'
Available-for-sale Securities Pledged as Collateral	$32,100,000	'

Securities_Details_2

Securities (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$7,280	'	$7,247
Unrealized Loss, Total	242	'	275
Comprehensive income	28,160	32,672	'
Change in unrealized gain on available-for-sale securities, net of taxes of $100 (unaudited)	-105	-471	'
Equity securities	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position	'	'	'
Fair Value, Less Than 12 Months	1,019	'	7,247
Unrealized Loss, Less Than 12 Months	3	'	275
Fair Value, 12 Months or Longer	6,261	'	0
Unrealized Loss, 12 Months or Longer	$239	'	$0

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans and Leases Receivable, Net Reported Amount	'	'	'	'
Commercial	$5,205,515	$5,020,565	'	'
Mortgage finance	2,688,044	2,784,265	2,784,265	'
Construction	1,437,609	1,262,905	'	'
Real Estate	2,229,349	2,146,228	'	'
Consumer	14,815	15,350	'	'
Leases	95,262	93,160	'	'
Loans and Leases Receivable, Gross, Total	11,670,594	11,322,473	'	'
Deferred inocme (net of origination costs)	54,517	51,899	'	'
Allowance for loan losses	-90,234	-87,604	-75,000	-74,337
Loans held for investment, net	$11,525,843	$11,182,970	'	'

Loans_and_Allowances_for_Credi

Loans and Allowances for Credit Losses - Credit Risk Profile (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Commercial	$5,205,515	$5,020,565	'
Mortgage finance	2,688,044	2,784,265	2,784,265
Construction	1,437,609	1,262,905	'
Real Estate	2,229,349	2,146,228	'
Consumer	14,815	15,350	'
Leases	95,262	93,160	'
Total loans held for investment	11,670,594	11,322,473	'
Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Commercial	33,212	24,132	'
Mortgage finance	0	0	'
Construction	123	102	'
Real Estate	7,334	6,338	'
Consumer	0	0	'
Leases	203	51	'
Total loans held for investment	40,872	30,623	'
Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Commercial	59,313	74,593	'
Mortgage finance	0	0	'
Construction	103	103	'
Real Estate	21,267	21,770	'
Consumer	60	45	'
Leases	2,963	3,742	'
Total loans held for investment	83,706	100,253	'
Pass [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Commercial	5,086,156	4,908,944	'
Mortgage finance	2,688,044	2,784,265	'
Construction	1,437,383	1,261,995	'
Real Estate	2,184,419	2,099,450	'
Consumer	14,747	15,251	'
Leases	92,054	89,317	'
Total loans held for investment	11,502,803	11,159,222	'
Nonperforming Financing Receivable [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Commercial	26,834	12,896	'
Mortgage finance	0	0	'
Construction	0	705	'
Real Estate	16,329	18,670	'
Consumer	8	54	'
Leases	42	50	'
Total loans held for investment	$43,213	$32,375	'

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses (Details 1) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Reserve for loan losses:	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	$87,604	$74,337
Loans charged-off	2,447	1,772
Recoveries	367	556
Net charge-offs	2,080	1,216
Provision for loan losses	4,710	1,879
Loans and Leases Receivable, Allowance, Ending Balance	$90,234	$75,000

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	$87,604	$74,337
Provision for possible loan losses	4,710	1,879
Loans charged-off	2,447	1,772
Recoveries	367	556
Net charge-offs	2,080	1,216
Loans and Leases Receivable, Allowance, Ending Balance	90,234	75,000
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	7,029	5,906
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	83,205	69,094
Commercial	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	39,868	21,547
Provision for possible loan losses	6,245	3,567
Loans charged-off	2,336	1,648
Recoveries	210	397
Net charge-offs	2,126	1,251
Loans and Leases Receivable, Allowance, Ending Balance	43,987	23,863
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	6,029	5,069
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	37,958	18,794
Mortgage Finance	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	0	0
Provision for possible loan losses	0	0
Loans charged-off	0	0
Recoveries	0	0
Net charge-offs	0	0
Loans and Leases Receivable, Allowance, Ending Balance	0	0
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	'
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	0	'
Construction	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	14,553	12,097
Provision for possible loan losses	583	-3,614
Loans charged-off	0	0
Recoveries	0	0
Net charge-offs	0	0
Loans and Leases Receivable, Allowance, Ending Balance	15,136	8,483
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	0
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	15,136	8,483
Real Estate	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	24,210	30,893
Provision for possible loan losses	-495	4,183
Loans charged-off	0	105
Recoveries	8	8
Net charge-offs	-8	97
Loans and Leases Receivable, Allowance, Ending Balance	23,723	34,979
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	993	812
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	22,730	34,167
Consumer	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	149	226
Provision for possible loan losses	56	-24
Loans charged-off	61	19
Recoveries	25	30
Net charge-offs	36	-11
Loans and Leases Receivable, Allowance, Ending Balance	169	213
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	1	15
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	168	198
Leases	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	3,105	2,460
Provision for possible loan losses	-575	-474
Loans charged-off	50	0
Recoveries	124	121
Net charge-offs	-74	-121
Loans and Leases Receivable, Allowance, Ending Balance	2,604	2,107
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	6	10
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	2,598	2,097
Unallocated	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Allowance, Beginning Balance	5,719	7,114
Provision for possible loan losses	-1,104	-1,759
Loans charged-off	0	0
Recoveries	0	0
Net charge-offs	0	0
Loans and Leases Receivable, Allowance, Ending Balance	4,615	5,355
Period end amount allocated to:	'	'
Period end allowance for loan loss allocated to loans individually evaluated for impairment	0	0
Period end allowance for loan loss allocated to loans collectively evaluated for impairment	$4,615	$5,355

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses (Details 3) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	$50,185	$39,976	$55,179
Loans collectively evaluated for impairment	11,620,409	11,282,497	9,483,173
Commercial	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	29,023	15,139	23,353
Loans collectively evaluated for impairment	5,176,492	5,005,426	4,132,330
Mortgage Finance	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	2,688,044	2,784,265	2,577,830
Construction	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	0	705	729
Loans collectively evaluated for impairment	1,437,609	1,262,200	760,235
Real Estate	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	21,112	24,028	30,991
Loans collectively evaluated for impairment	2,208,237	2,122,200	1,928,817
Consumer	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	8	54	37
Loans collectively evaluated for impairment	14,807	15,296	17,427
Leases	'	'	'
AccountsNotesAndLoansReceivableLineItems	'	'	'
Loans individually evaluated for impairment	42	50	69
Loans collectively evaluated for impairment	$95,220	$93,110	$66,534

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses (Details 4) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	$43,213	$32,375
Commercial | Business loans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	26,834	12,896
Commercial | Energy	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	0	0
Construction | Market risk	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	0	705
Real estate | Market risk	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	9,624	15,607
Real estate | Commercial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	4,184	508
Real estate | Secured by 1-4 family	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	2,521	2,555
Consumer	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	8	54
Leases	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total non-accrual loans	$42	$50

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses (Details 5) (USD $)	3 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
		Commercial	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With no related allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	With an allowance recorded	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined	Combined
		Energy			Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Construction	Construction	Construction	Construction	Construction	Construction	Real estate	Real estate	Real estate	Real estate	Real estate	Real estate	Consumer	Consumer	Leases	Leases			Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Construction	Construction	Construction	Construction	Construction	Construction	Real estate	Real estate	Real estate	Real estate	Real estate	Real estate	Consumer	Consumer	Leases	Leases			Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Construction	Construction	Construction	Construction	Construction	Construction	Construction	Real estate	Real estate	Real estate	Real estate	Real estate	Real estate	Consumer	Consumer	Leases	Leases
					Business loans	Business loans	Energy	Energy	Other	Other	Other	Other	Market risk	Market risk	Secured by 1-4 family	Secured by 1-4 family	Market risk	Market risk	Commercial	Commercial	Secured by 1-4 family	Secured by 1-4 family							Business loans	Business loans	Energy	Energy	Other	Other	Other	Other	Market risk	Market risk	Secured by 1-4 family	Secured by 1-4 family	Market risk	Market risk	Commercial	Commercial	Secured by 1-4 family	Secured by 1-4 family							Business loans	Business loans	Energy	Energy	Other	Other	Other	Other	Market risk	Market risk	Commercial	Secured by 1-4 family	Secured by 1-4 family	Market risk	Market risk	Commercial	Commercial	Secured by 1-4 family	Secured by 1-4 family
Financing Receivable, Impaired [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Recorded Investment	'	$1,614	$18,400	$19,676	$6,412	$2,005	$0	'	$0	$0	$0	$0	$0	$705	$0	$0	$8,159	$13,524	$2,509	$508	$1,320	$1,320	$0	$0	$0	$0	$31,785	$20,300	$21,235	$11,060	$1,376	$460	$0	$0	$0	$0	$0	$0	$0	$0	$5,103	$6,289	$1,675	$0	$2,346	$2,387	$8	$54	$42	$50	$50,185	$39,976	$27,647	$13,065	$1,376	$2,074	$0	$0	$0	$0	$0	$705	'	$0	$0	$13,262	$19,813	$4,184	$508	$3,666	$3,707	$8	$54	$42	$50
Unpaid Principal Balance	'	'	20,649	21,505	8,661	2,005	0	3,443	0	0	0	0	0	705	0	0	8,159	13,524	2,509	508	1,320	1,320	0	0	0	0	34,715	21,665	21,235	12,425	4,306	460	0	0	0	0	0	0	0	0	5,103	6,289	1,675	0	2,346	2,387	8	54	42	50	55,364	43,170	29,896	14,430	4,306	3,903	0	0	0	0	0	705	'	0	0	13,262	19,813	4,184	508	3,666	3,707	8	54	42	50
Related Allowance	'	'	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	7,029	3,174	5,331	1,946	698	69	0	0	0	0	0	0	0	0	284	822	395	0	314	321	1	8	6	8	7,029	3,174	5,331	1,946	698	69	0	0	0	0	0	0	'	0	0	284	822	395	0	314	321	1	8	6	8
Average Recorded Investment	62,600	'	19,252	26,063	3,475	4,265	1,076	969	0	0	0	0	470	3,111	0	0	11,736	9,796	1,175	5,458	1,320	2,464	0	0	0	0	24,127	24,731	14,451	14,240	765	913	0	0	0	0	0	160	0	0	5,894	7,912	558	477	2,373	914	39	43	47	72	43,379	50,794	17,926	18,505	1,841	1,882	0	0	0	0	470	3,271	0	0	'	17,630	17,708	1,733	5,935	3,693	3,378	39	43	47	72
Interest Income Recognized	'	'	$0	$114	$0	$0	$0	$0	$0	$0	$0	$0	$0	$114	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$114	$0	$0	$0	$0	$0	$0	$0	$0	$0	$114	'	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0	$0

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses (Details 6) (USD $)	Mar. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	$47,154,000
60-89 Days Past Due	5,840,000
Financing Receivable, Recorded Investment, Past Due, Total	60,863,000
Current	11,566,518,000
Total loans held for investment	11,627,381,000
Greater Than 90 Days and Accruing	7,869,000
Greater Than 90 Days and Accruing, premium finance loans	4,700,000
Commercial | Business loans	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	16,724,000
60-89 Days Past Due	3,676,000
Financing Receivable, Recorded Investment, Past Due, Total	28,269,000
Current	4,183,988,000
Total loans held for investment	4,212,257,000
Greater Than 90 Days and Accruing	7,869,000
Commercial | Energy	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	966,424,000
Total loans held for investment	966,424,000
Greater Than 90 Days and Accruing	0
Mortgage Finance	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Greater Than 90 Days	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	2,688,044,000
Total loans held for investment	2,688,044,000
Construction | Market risk	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	3,462,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	3,462,000
Current	1,417,795,000
Total loans held for investment	1,421,257,000
Greater Than 90 Days and Accruing	0
Construction | Secured by 1-4 family	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	0
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	0
Current	16,352,000
Total loans held for investment	16,352,000
Greater Than 90 Days and Accruing	0
Real estate | Market risk	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	9,411,000
60-89 Days Past Due	1,595,000
Financing Receivable, Recorded Investment, Past Due, Total	11,006,000
Current	1,694,172,000
Total loans held for investment	1,705,178,000
Greater Than 90 Days and Accruing	0
Real estate | Commercial	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	13,908,000
60-89 Days Past Due	501,000
Financing Receivable, Recorded Investment, Past Due, Total	14,409,000
Current	403,167,000
Total loans held for investment	417,576,000
Greater Than 90 Days and Accruing	0
Real estate | Secured by 1-4 family	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	2,954,000
60-89 Days Past Due	68,000
Financing Receivable, Recorded Investment, Past Due, Total	3,022,000
Current	87,244,000
Total loans held for investment	90,266,000
Greater Than 90 Days and Accruing	0
Consumer	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	10,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	10,000
Current	14,797,000
Total loans held for investment	14,807,000
Greater Than 90 Days and Accruing	0
Leases	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'
30-59 Days Past Due	685,000
60-89 Days Past Due	0
Financing Receivable, Recorded Investment, Past Due, Total	685,000
Current	94,535,000
Total loans held for investment	95,220,000
Greater Than 90 Days and Accruing	$0

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses (Details 7) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Financing Receivable, Modifications [Line Items]	'	'	'
Number of Contracts	1	'	1
Pre-Restructuring Outstanding Recorded Investment	$1,441,000	'	$1,945,000
Post-Restructuring Outstanding Recorded Investment	1,441,000	'	1,945,000
Loans considered restructured that are not already on nonaccrual	2,800,000	1,900,000	'
Financing Receivable Modifications Recorded Investment Reclassification from Nonaccrual To Accrual	930,000	'	'
Nonaccrual loans that met the criteria for restructured	16,300,000	17,800,000	'
Real estate loan that subsequently defaulted | Market risk	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Number of Contracts	'	'	1
Post-Restructuring Outstanding Recorded Investment	'	'	2,453,000
Commercial | Business loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Number of Contracts	'	'	1
Pre-Restructuring Outstanding Recorded Investment	'	'	1,945,000
Post-Restructuring Outstanding Recorded Investment	'	'	1,945,000
Commercial | Real estate loan that subsequently defaulted	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Number of Contracts	'	'	1
Post-Restructuring Outstanding Recorded Investment	'	'	814,000
Real estate | Business loans	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Number of Contracts	1	'	'
Pre-Restructuring Outstanding Recorded Investment	1,441,000	'	'
Post-Restructuring Outstanding Recorded Investment	$1,441,000	'	'

Recovered_Sheet1

Loans and Allowance for Credit Losses - TDR Summary (Details 8) (USD $)	Mar. 31, 2014	Mar. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	$1,441	$1,945
Extended maturity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	1,441	0
Adjusted interest rates [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	0	0
Combination of rate and maturity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	0	1,945
Other [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Recorded Investment	$0	$0

OREO_and_Valuation_Allowance_f2

OREO and Valuation Allowance for Losses on OREO (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Real Estate Owned, Disclosure of Detailed Components [Abstract]	'	'
Beginning balance	$5,110	$15,991
Additions	851	0
Sales	3,541	1,494
Valuation allowance for OREO	0	0
Real Estate Acquired Through Foreclosure Direct Write Offs	0	-71
Ending balance	$2,420	$14,426

Financial_Instruments_with_Off2

Financial Instruments with Off-Balance Sheet Risk (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments to extend credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$3,922,938	$3,674,391
Standby letters of credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$159,810	$145,662

Regulatory_Restrictions_Detail

Regulatory Restrictions (Details)	Mar. 31, 2014	Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total capital (to risk weighted assets), actual ratio	12.70%	10.73%
Tier 1 capital (to risk-weighted assets), actual ratio	9.85%	9.15%
Tier 1 capital (to average assets), actual ratio	11.57%	10.87%

Regulatory_Restrictions_Detail1

Regulatory Restrictions (Details 1) (USD $)	Mar. 31, 2014	Mar. 31, 2013
In Thousands, unless otherwise specified
Loans and Leases Receivable, Net of Deferred Income	$8,928,033	$8,486,309

Employee_Benefits_Details_3

Employee Benefits (Details 3) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Restricted stock units, additional disclosures	'	'
Compensation expense	$1,262	$905
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	13,709	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'3 years 8 months	'
Excess tax benefits from stock-based compensation arrangements	2,729	-3,890
RSUs	'	'
Restricted stock units, additional disclosures	'	'
Compensation expense	1,119	757
Cash-based compensation expense	3,393	1,039
SARs	'	'
Restricted stock units, additional disclosures	'	'
Compensation expense	$143	$148

Fair_Value_Disclosures_Details

Fair Value Disclosures (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	$52,960	$63,214	'	'
OREO	2,420	5,110	14,426	15,991
Mortgage-backed securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	38,674	41,462	'	'
Municipals	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	7,006	14,505	'	'
Equity securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	7,280	7,247	'	'
Fair value measuremenets, recurring basis | Level 1	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Derivative assets	0	0	'	'
Derivative liabilitiy	0	0	'	'
Fair value measuremenets, recurring basis | Level 1 | Mortgage-backed securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	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, Fair Value Disclosure	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, Fair Value Disclosure	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, Fair Value Disclosure	0	0	'	'
Fair value measuremenets, recurring basis | Level 2	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Derivative assets	15,392	9,317	'	'
Derivative liabilitiy	15,392	9,317	'	'
Fair value measuremenets, recurring basis | Level 2 | Mortgage-backed securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	38,674	41,462	'	'
Fair value measuremenets, recurring basis | Level 2 | Corporate securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0	'	'
Fair value measuremenets, recurring basis | Level 2 | Municipals	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	7,006	14,505	'	'
Fair value measuremenets, recurring basis | Level 2 | Equity securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	7,280	7,247	'	'
Fair value measuremenets, recurring basis | Level 3	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Derivative assets	0	0	'	'
Derivative liabilitiy	0	0	'	'
Fair value measuremenets, recurring basis | Level 3 | Mortgage-backed securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	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, Fair Value Disclosure	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, Fair Value Disclosure	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, Fair Value Disclosure	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	12,900	13,474	'	'
OREO	$2,420	$5,110	'	'

Fair_Value_Disclosures_Details1

Fair Value Disclosures (Details 1) (Impaired loans, USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Impaired loans	'
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]	'
Asset measured on nonrecurring basis, carrying value	$13.10

Fair_Value_Disclosures_Details2

Fair Value Disclosures (Details 2) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities, Fair Value Disclosure	$52,960	$63,214
Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	257,799	153,911
Available-for-sale Securities, Fair Value Disclosure	52,960	63,214
Loans held for sale from discontinued operations	292	294
Loans held for investment, net	11,525,843	11,182,970
Derivative assets	15,392	9,317
Deposits	9,729,128	9,257,379
Federal funds purchased	143,573	148,650
Borrowings	534,453	876,980
Subordinated notes	286,000	111,000
Trust preferred subordinated debentures	113,406	113,406
Derivative liabilities	15,392	9,317
Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	257,799	153,911
Available-for-sale Securities, Fair Value Disclosure	52,960	63,214
Loans held for sale from discontinued operations	292	294
Loans held for investment, net	11,529,582	11,179,145
Derivative assets	15,392	9,317
Deposits	9,726,455	9,257,574
Federal funds purchased	143,573	148,650
Borrowings	534,453	861,981
Subordinated notes	280,023	96,647
Trust preferred subordinated debentures	113,406	113,406
Derivative liabilities	$15,392	$9,317

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
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.	'
Credit exposure on risk derivatives	$15,400,000	$9,300,000
Cash Pledged As Derivative Collateral	18,500,000	10,700,000
Interest rate swaps | Non-hedging | Commercial loan/lease	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value, Derivative Assets	14,808,000	8,652,000
Estimated Fair Value, Derivative Liabilities	-14,808,000	-8,652,000
Notional Amount, Derivative Assets	816,578,000	764,939,000
Notional Amount, Derivative Liabilities	-816,578,000	-764,939,000
Interest rate swaps | Non-hedging | Commercial loan/lease | Interest Rate Received	'	'
Derivatives, Fair Value [Line Items]	'	'
Weighted-average receive and pay interest rate	4.87%	4.89%
Interest rate swaps | Non-hedging | Commercial loan/lease | Interest Rate Paid	'	'
Derivatives, Fair Value [Line Items]	'	'
Weighted-average receive and pay interest rate	2.89%	2.99%
Interest Rate Cap [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount, Derivative Assets	'	-58,706,000
Weighted-average receive and pay interest rate	1.45%	1.87%
Interest Rate Cap [Member] | Non-hedging | Commercial loan/lease	'	'
Derivatives, Fair Value [Line Items]	'	'
Estimated Fair Value, Derivative Assets	-584,000	-665,000
Estimated Fair Value, Derivative Liabilities	584,000	665,000
Notional Amount, Derivative Assets	-35,273,000	'
Notional Amount, Derivative Liabilities	$35,273,000	$58,706,000

Stockholders_Equity_Details

Stockholder's Equity (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Equity Distribution Agreement [Line Items]	'	'
Sale of common stock	$106,548	$0
Issuance of preferred stock - Value	$0	$145,078