Texas Capital Bancshares (TCBI) 10-Q 21 Apr 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 20, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	TEXAS CAPITAL BANCSHARES INC/TX
Entity Central Index Key	1,077,428
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		45,904,763

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 89,277	$ 109,496
Interest-bearing deposits	2,614,418	1,626,374
Federal funds sold and securities purchased under resale agreements	30,000	55,000
Securities, available-for-sale	28,461	29,992
Loans held for sale, at fair value	94,702	86,075
Loans held for investment, mortgage finance	4,981,304	4,966,276
Loans held for investment (net of unearned income)	12,059,849	11,745,674
Less: Allowance for loan losses	162,510	141,111
Loans held for investment, net	16,878,643	16,570,839
Mortgage servicing rights, net	4,253	423
Premises and equipment, net	22,924	23,561
Accrued interest receivable and other assets	428,344	382,101
Goodwill and intangible assets, net	19,871	19,960
Total assets	20,210,893	18,903,821
Non-interest-bearing
Non-interest-bearing	7,455,107	6,386,911
Interest-bearing	8,843,740	8,697,708
Total deposits	16,298,847	15,084,619
Accrued interest payable	2,880	5,097
Other liabilities	163,040	153,433
Federal funds purchased and repurchase agreements	100,859	143,051
Other borrowings	1,604,000	1,500,000
Subordinated notes	280,773	280,682
Trust preferred subordinated debentures	113,406	113,406
Total liabilities	18,563,805	17,280,288
Stockholders’ equity:
Preferred stock, $.01 par value, $1,000 liquidation value; Authorized shares - 10,000,000; Issued shares – 6,000,000 shares issued at June 30, 2015 and December 31, 2014, respectively	150,000	150,000
Common stock, $.01 par value; Authorized shares - 100,000,000; Issued shares – 45,813,388 and 45,735,424 at June 30, 2015 and December 31, 2014, respectively	459	459
Additional paid-in capital	715,435	714,546
Retained earnings	780,508	757,818
Treasury stock (shares at cost: 417 at March 31, 2016 and December 31, 2015)	(8)	(8)
Accumulated other comprehensive income, net of taxes	694	718
Total stockholders’ equity	1,647,088	1,623,533
Total liabilities and stockholders’ equity	$ 20,210,893	$ 18,903,821

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 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 value	$ 0.01	$ 0.01
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	45,902,906	45,874,224
Treasury Stock, shares	417	417

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income
Interest and fees on loans	$ 155,885	$ 139,174
Securities	261	358
Federal funds sold and securities purchased under resale agreements	372	116
Deposits in other banks	3,285	1,260
Total interest income	159,803	140,908
Interest expense
Deposits	8,822	5,628
Federal funds purchased	126	68
Repurchase agreements	3	4
Other borrowings	1,162	390
Subordinated notes	4,191	4,191
Trust preferred subordinated debentures	716	618
Total interest expense	15,020	10,899
Net interest income	144,783	130,009
Provision for credit losses	30,000	11,000
Net interest income after provision for credit losses	114,783	119,009
Non-interest income
Service charges on deposit accounts	2,110	2,094
Trust fee income	813	1,200
Bank owned life insurance (BOLI) income	536	484
Brokered loan fees	4,645	4,232
Swap fees	307	1,986
Other	2,886	2,271
Total non-interest income	11,297	12,267
Non-interest expense
Salaries and employee benefits	51,372	45,828
Net occupancy expense	5,812	5,691
Marketing	3,908	4,218
Legal and professional	5,324	4,048
Communications and technology	6,217	5,078
FDIC insurance assessment	5,469	3,790
Allowance and other carrying costs for OREO	236	9
Other	8,482	7,855
Total non-interest expense	86,820	76,517
Income before income taxes	39,260	54,759
Income tax expense	14,132	19,709
Net income	25,128	35,050
Preferred stock dividends	2,438	2,438
Net income available to common stockholders	22,690	32,612
Other comprehensive income (loss)
Change in net unrealized gain on available-for-sale securities arising during period, before-tax	(38)	(76)
Income tax benefit related to net unrealized gain on available-for-sale securities	(14)	(27)
Other comprehensive loss, net of tax	(24)	(49)
Comprehensive income	$ 25,104	$ 35,001
Basic earnings per common share (usd per share)	$ 0.49	$ 0.71
Diluted earnings per common share (usd per share)	$ 0.49	$ 0.70

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss), Net of Taxes
Stockholders' equity, beginning balance at Dec. 31, 2014	$ 1,484,190	$ 150,000	$ 457	$ 709,738	$ 622,714	$ (8)	$ 1,289
Shares, outstanding, beginning balance at Dec. 31, 2014		6,000,000	45,735,424			417
Comprehensive income:
Net income	35,050				35,050
Change in unrealized gain on available-for-sale securities, net of taxes	(49)						(49)
Total comprehensive income	35,001
Tax benefit related to exercise of stock-based awards	263			263
Stock-based compensation expense recognized in earnings	991			991
Issuance of preferred stock - value	0	$ 0		0
Issuance of preferred stock - shares		0
Preferred stock dividend	(2,438)				(2,438)
Issuance of stock related to stock-based awards - value	49		$ 0	49
Issuance of stock related to stock-based awards - shares			37,238
Stockholders' equity, ending balance at Mar. 31, 2015	1,517,958	$ 150,000	$ 457	710,943	655,326	$ (8)	1,240
Shares, outstanding, ending balance at Mar. 31, 2015		6,000,000	45,772,662			417
Stockholders' equity, beginning balance at Dec. 31, 2015	1,623,533	$ 150,000	$ 459	714,546	757,818	$ (8)	718
Shares, outstanding, beginning balance at Dec. 31, 2015		6,000,000	45,874,224			417
Comprehensive income:
Net income	25,128				25,128
Change in unrealized gain on available-for-sale securities, net of taxes	(24)						(24)
Total comprehensive income	25,104
Tax benefit related to exercise of stock-based awards	40			40
Stock-based compensation expense recognized in earnings	1,132			1,132
Preferred stock dividend	(2,438)				(2,438)
Issuance of stock related to stock-based awards - value	283		$ 0	283
Issuance of stock related to stock-based awards - shares			28,682
Stockholders' equity, ending balance at Mar. 31, 2016	$ 1,647,088	$ 150,000	$ 459	$ 715,435	$ 780,508	$ (8)	$ 694
Shares, outstanding, ending balance at Mar. 31, 2016		6,000,000	45,902,906			417

CONSOLIDATED STATEMENTS OF STO6

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Income tax benefit (expense) related to net unrealized gain on available-for-sale securities	$ 14	$ 27

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities
Income from continuing operations	$ 25,128	$ 35,050
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	30,000	11,000
Depreciation and amortization	5,124	4,060
Bank owned life insurance (BOLI) income	(536)	(484)
Stock-based compensation expense	(459)	(2,357)
Excess tax benefits from stock-based compensation arrangements	(109)	(305)
Purchases of loans held for sale	365,645	0
Proceeds from sales and repayments of loans held for sale	357,018	0
Capitalization of mortgage servicing rights	3,903	0
Loss on sale of assets	33	0
Changes in operating assets and liabilities:
Accrued interest receivable and other assets	(31,778)	(25,890)
Accrued interest payable and other liabilities	6,911	9,926
Net cash provided by operating activities	22,702	35,714
Payments to Acquire Available-for-sale Securities	(391)	0
Investing activities
Maturities and calls of available-for-sale securities	265	1,950
Principal payments received on available-for-sale securities	1,619	2,044
Originations of mortgage finance loans	(19,706,715)	(21,276,920)
Proceeds from pay-offs of mortgage finance loans	19,691,687	19,970,295
Net increase in loans held for investment, excluding mortgage finance loans	(338,969)	(609,967)
Purchase (disposal) of premises and equipment, net	(859)	251
Proceeds from sale of foreclosed assets	62	1,065
Net cash used in investing activities	(353,301)	(1,911,282)
Financing activities
Net increase in deposits	1,214,228	1,449,006
Costs from issuance of stock related to stock-based awards and warrants	(283)	(49)
Net proceeds from issuance of common stock	0	0
Preferred dividends paid	(2,438)	(2,438)
Net increase (decrease) in other borrowings	104,000	(100,005)
Excess tax benefits from stock-based compensation arrangements	109	305
Net increase (decrease) in Federal funds purchased and repurchase agreements	(42,192)	32,782
Net proceeds from issuance of subordinated notes	0	0
Net cash provided by financing activities	1,273,424	1,379,601
Net increase (decrease) in cash and cash equivalents	942,825	(495,967)
Cash and cash equivalents at beginning of period	1,790,870	1,330,514
Cash and cash equivalents at end of period	2,733,695	834,547
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	17,237	13,101
Cash paid during the period for income taxes	333	891
Transfers from loans/leases to OREO and other repossessed assets	$ 17,398	$ 1,092

OPERATIONS AND SUMMARY OF SIGNI

OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operations and summary of significant accounting policies	OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization and Nature of Business Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional and national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas. Basis of Presentation Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation. The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make the interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and 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, 2015 , included in our Annual Report on Form 10-K filed with the SEC on February 18, 2016 (the “2015 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE	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 2016 2015 Numerator: Net income $ 25,128 $ 35,050 Preferred stock dividends 2,438 2,438 Net income available to common stockholders $ 22,690 32,612 Denominator: Denominator for basic earnings per share— weighted average shares 45,888,735 45,758,655 Effect of employee stock-based awards (1) 117,372 210,736 Effect of warrants to purchase common stock 348,271 398,479 Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions 46,354,378 46,367,870 Basic earnings per common share $ 0.49 $ 0.71 Diluted earnings per common share $ 0.49 $ 0.70 (1) Stock options, SARs and RSUs outstanding of 308,972 at March 31, 2016 and 168,300 at March 31, 2015 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, 2016
Available-for-sale Securities [Abstract]
SECURITIES	SECURITIES At March 31, 2016 , our net unrealized gain on the available-for-sale securities portfolio was $1.1 million compared to $1.1 million at December 31, 2015 . As a percent of outstanding balances, the unrealized gain was 3.90% and 3.83% at March 31, 2016 , and December 31, 2015 , respectively. The increase in the unrealized gain percentage at March 31, 2016 is related to the reduction in the portfolio balance due to paydowns and maturities. The following is a summary of available-for-sale securities (in thousands): March 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale securities: Residential mortgage-backed securities $ 18,916 $ 1,246 $ — $ 20,162 Municipals 564 2 — 566 Equity securities (1) 7,913 25 (205 ) 7,733 $ 27,393 $ 1,273 $ (205 ) $ 28,461 December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale securities: Residential mortgage-backed securities $ 20,536 $ 1,365 $ — $ 21,901 Municipals 828 3 — 831 Equity securities (1) 7,522 11 (273 ) 7,260 $ 28,886 $ 1,379 $ (273 ) $ 29,992 (1) Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan. The amortized cost and estimated fair value of available-for-sale securities are presented below by contractual maturity (in thousands, except percentage data): March 31, 2016 Less Than One Year After One Through Five Years After Five Through Ten Years After Ten Years Total Available-for-sale: Residential mortgage-backed securities: (1) Amortized cost $ 203 $ 3,855 $ 3,986 $ 10,872 $ 18,916 Estimated fair value 205 4,003 4,462 11,492 20,162 Weighted average yield (3) 5.57 % 4.72 % 5.54 % 2.54 % 3.36 % Municipals: (2) Amortized cost 275 289 — — 564 Estimated fair value 275 291 — — 566 Weighted average yield (3) 5.61 % 5.76 % — — 5.69 % Equity securities: (4) Amortized cost 7,913 — — — 7,913 Estimated fair value 7,733 — — — 7,733 Total available-for-sale securities: Amortized cost $ 27,393 Estimated fair value $ 28,461 December 31, 2015 Less Than One Year After One Through Five Years After Five Through Ten Years After Ten Years Total Available-for-sale: Residential mortgage-backed securities: (1) Amortized cost $ 214 $ 4,655 $ 4,265 $ 11,402 $ 20,536 Estimated fair value 217 4,837 4,747 12,100 21,901 Weighted average yield (3) 5.62 % 4.71 % 5.54 % 2.53 % 3.68 % Municipals: (2) Amortized cost 265 563 — — 828 Estimated fair value 265 566 — — 831 Weighted average yield (3) 5.46 % 5.69 % — % — % 5.62 % Equity securities: (4) Amortized cost 7,522 — — — 7,522 Estimated fair value 7,260 — — — 7,260 Total available-for-sale securities: Amortized cost $ 28,886 Estimated fair value $ 29,992 (1) Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties. (2) Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate. (3) Yields are calculated based on amortized cost. (4) These equity securities do not have a stated maturity. Securities with carrying values of approximately $18.8 million were pledged to secure certain borrowings and deposits at March 31, 2016 . Of the pledged securities at March 31, 2016 , approximately $5.8 million were pledged for certain deposits, and approximately $13.0 million were pledged for repurchase agreements. The following table discloses, as of March 31, 2016 and December 31, 2015 , 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): March 31, 2016 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Equity securities $ — $ — $ 6,295 $ (205 ) $ 6,295 $ (205 ) December 31, 2015 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Equity securities $ — $ — $ 6,227 $ (273 ) $ 6,227 $ (273 ) At March 31, 2016 , we owned one security with an unrealized loss position. This security is a publicly traded equity fund and is subject to market pricing volatility. We do not believe this unrealized loss is “other-than-temporary”. We have evaluated the near-term prospects of the investment in relation to the severity and duration of the impairment and based on that evaluation have the ability and intent to hold the investment until recovery of fair value.

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	3 Months Ended
	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans and allowance for credit losses	LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR LOAN LOSSES At March 31, 2016 and December 31, 2015 , loans held for investment were as follows (in thousands): March 31, December 31, Commercial $ 6,889,799 $ 6,672,631 Mortgage finance 4,981,304 4,966,276 Construction 1,958,370 1,851,717 Real estate 3,136,981 3,139,197 Consumer 26,439 25,323 Leases 104,460 113,996 Gross loans held for investment 17,097,353 16,769,140 Deferred income (net of direct origination costs) (56,200 ) (57,190 ) Allowance for loan losses (162,510 ) (141,111 ) Total loans held for investment $ 16,878,643 $ 16,570,839 Commercial Loans and Leases. Our commercial loan portfolio is comprised of lines of credit for working capital and term loans and leases to finance equipment and other business assets. Our energy production loans are generally collateralized with proven reserves based on appropriate valuation standards and take into account the risk of oil and gas price volatility. 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 to make loans on a transaction basis. Our lines of credit typically are limited to a percentage of the value of the assets securing the line. Lines of credit and term loans typically are reviewed annually, or more frequently, as needed, and are supported by accounts receivable, inventory, equipment and other assets of our clients’ businesses. Mortgage Finance Loans. Our mortgage finance loans consist of ownership interests purchased in single-family residential mortgages funded through our mortgage finance group. These loans are typically held on our balance sheet for 10 to 20 days. 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. March 31, 2016 and December 31, 2015 balances are stated net of $515.4 million and $454.8 million participations sold, respectively. 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. Loan amounts are derived primarily from the Bank's evaluation of expected cash flows available to service debt from stabilized projects under hypothetically stressed conditions. Construction loans are also based in part 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 sensitive to overall economic conditions. Borrowers may not be able to correct conditions of default in loans, increasing risk of exposure to classification, non-performing status, reserve allocation and actual credit loss and foreclosure. These loans typically have floating rates and commitment fees. Real Estate Loans. A portion of our real estate loan portfolio is comprised of loans secured by properties other than market risk or investment-type real estate. Market risk loans are real estate loans where the primary source of repayment is expected to come from the sale, permanent financing or lease of the real property collateral. We generally provide temporary financing for commercial and residential property. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Our real estate loans generally have maximum terms of five to seven years, and we provide loans with both floating and fixed rates. We generally avoid long-term loans for commercial real estate held for investment. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Appraised values may be highly variable due to market conditions and the impact of the inability of potential purchasers and lessees to obtain financing and a lack of transactions at comparable values. At March 31, 2016 and December 31, 2015 , we had a blanket floating lien on certain real estate-secured loans, mortgage finance loans and certain securities used as collateral for Federal Home Loan Bank (“FHLB”) borrowings. Summary of Loan Loss Experience The allowance 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 consider the allowance at March 31, 2016 to be appropriate, given management's assessment of potential losses inherent in the portfolio as of the evaluation date, the significant growth in the loan and lease portfolio, current economic conditions in our market areas and other factors. The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Grade: Pass $ 6,527,449 $ 4,981,304 $ 1,938,758 $ 3,086,536 $ 26,135 $ 99,275 $ 16,659,457 Special mention 82,333 — 8,047 36,281 1 251 126,913 Substandard-accruing 113,920 — 11,565 7,448 303 4,591 137,827 Non-accrual 166,097 — — 6,716 — 343 173,156 Total loans held for investment $ 6,889,799 $ 4,981,304 $ 1,958,370 $ 3,136,981 $ 26,439 $ 104,460 $ 17,097,353 December 31, 2015 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Grade: Pass $ 6,375,332 $ 4,966,276 $ 1,821,678 $ 3,085,463 $ 25,093 $ 103,560 $ 16,377,402 Special mention 111,911 — 13,090 30,585 3 334 155,923 Substandard-accruing 46,731 — 281 3,837 227 4,951 56,027 Non-accrual 138,657 — 16,668 19,312 — 5,151 179,788 Total loans held for investment $ 6,672,631 $ 4,966,276 $ 1,851,717 $ 3,139,197 $ 25,323 $ 113,996 $ 16,769,140 The following table details activity in the reserve for loan losses by portfolio segment for the three months ended March 31, 2016 and March 31, 2015 . Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories. March 31, 2016 (in thousands) Commercial Mortgage Finance Construction Real Estate Consumer Leases Additional Qualitative Reserve Total Beginning balance $ 112,446 $ — $ 6,836 $ 13,381 $ 338 $ 3,931 $ 4,179 $ 141,111 Provision for loan losses 26,581 — 1,050 1,134 (15 ) (2,435 ) 2,480 28,795 Charge-offs 8,496 — — — — — — 8,496 Recoveries 1,040 — — 8 7 45 — 1,100 Net charge-offs (recoveries) 7,456 — — (8 ) (7 ) (45 ) — 7,396 Ending balance $ 131,571 $ — $ 7,886 $ 14,523 $ 330 $ 1,541 $ 6,659 $ 162,510 Period end amount allocated to: Loans individually evaluated for impairment $ 31,415 $ — $ — $ 1,183 $ — $ 51 $ — $ 32,649 Loans collectively evaluated for impairment 100,156 — 7,886 13,340 330 1,490 6,659 129,861 Ending balance $ 131,571 $ — $ 7,886 $ 14,523 $ 330 $ 1,541 $ 6,659 $ 162,510 March 31, 2015 (in thousands) Commercial Mortgage Finance Construction Real Estate Consumer Leases Additional Qualitative Reserve Total Beginning balance $ 70,654 $ — $ 7,935 $ 15,582 $ 240 $ 1,141 $ 5,402 $ 100,954 Provision for loan losses 23,375 — (3,472 ) (5,601 ) 149 (138 ) (4,068 ) 10,245 Charge-offs 3,102 — — 346 62 — — 3,510 Recoveries 286 — 83 8 4 8 — 389 Net charge-offs (recoveries) 2,816 — (83 ) 338 58 (8 ) — 3,121 Ending balance $ 91,213 $ — $ 4,546 $ 9,643 $ 331 $ 1,011 $ 1,334 $ 108,078 Period end amount allocated to: Loans individually evaluated for impairment $ 10,958 $ — $ — $ 248 $ — $ 26 $ — $ 11,232 Loans collectively evaluated for impairment 80,255 — 4,546 9,395 331 985 1,334 96,846 Ending balance $ 91,213 $ — $ 4,546 $ 9,643 $ 331 $ 1,011 $ 1,334 $ 108,078 We have traditionally maintained an additional qualitative reserve component to compensate 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 believe the level of additional qualitative reserves at March 31, 2016 is warranted due to the continued uncertain economic environment which has produced losses, including those resulting from borrowers' misstatement of financial information or inaccurate certification of collateral values. Such losses 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 and continued volatility in the energy sector. Our recorded investment in loans as of March 31, 2016 , December 31, 2015 and March 31, 2015 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): March 31, 2016 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Loans individually evaluated for impairment $ 167,832 $ — $ — $ 8,397 $ — $ 343 $ 176,572 Loans collectively evaluated for impairment 6,721,967 4,981,304 1,958,370 3,128,584 26,439 104,117 16,920,781 Total $ 6,889,799 $ 4,981,304 $ 1,958,370 $ 3,136,981 $ 26,439 $ 104,460 $ 17,097,353 December 31, 2015 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Loans individually evaluated for impairment $ 140,479 $ — $ 16,668 $ 21,042 $ — $ 5,151 $ 183,340 Loans collectively evaluated for impairment 6,532,152 4,966,276 1,835,049 3,118,155 25,323 108,845 16,585,800 Total $ 6,672,631 $ 4,966,276 $ 1,851,717 $ 3,139,197 $ 25,323 $ 113,996 $ 16,769,140 March 31, 2015 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Loans individually evaluated for impairment $ 61,233 $ — $ — $ 11,910 $ — $ 172 $ 73,315 Loans collectively evaluated for impairment 6,127,725 5,408,750 1,559,545 2,945,876 17,868 92,879 16,152,643 Total $ 6,188,958 $ 5,408,750 $ 1,559,545 $ 2,957,786 $ 17,868 $ 93,051 $ 16,225,958 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, 2016 , $ 824,000 of our non-accrual loans were earning on a cash basis compared to $ 884,000 at December 31, 2015 . 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. 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 ("ASC 310"), 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, 2016 and December 31, 2015 (in thousands): March 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial Business loans $ 6,494 $ 8,927 $ — $ 9,563 $ — Energy 41,230 41,230 — 39,055 — Construction Market risk — — — 11,112 — Real estate Market risk — — — — — Commercial 2,825 2,825 — 11,177 8 Secured by 1-4 family — — — — — Consumer — — — — — Leases — — — 1,611 — Total impaired loans with no allowance recorded $ 50,549 $ 52,982 $ — $ 72,518 $ 8 With an allowance recorded: Commercial Business loans $ 20,047 $ 26,803 $ 3,774 $ 20,671 $ — Energy 100,061 105,927 27,641 80,308 7 Construction Market risk — — — — — Real estate Market risk 5,225 5,225 1,061 5,298 — Commercial — — — — — Secured by 1-4 family 347 347 122 352 — Consumer — — — — — Leases 343 343 51 1,937 — Total impaired loans with an allowance recorded $ 126,023 $ 138,645 $ 32,649 $ 108,566 $ 7 Combined: Commercial Business loans $ 26,541 $ 35,730 $ 3,774 $ 30,234 $ — Energy 141,291 147,157 27,641 119,363 7 Construction Market risk — — — 11,112 — Real estate Market risk 5,225 5,225 1,061 5,298 — Commercial 2,825 2,825 — 11,177 8 Secured by 1-4 family 347 347 122 352 — Consumer — — — — — Leases 343 343 51 3,548 — Total impaired loans $ 176,572 $ 191,627 $ 32,649 $ 181,084 $ 15 December 31, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial Business loans $ 11,097 $ 13,529 $ — $ 17,311 $ — Energy 37,968 37,968 — 21,791 36 Construction Market risk 16,668 16,668 — 9,764 — Real estate Market risk — — — 3,352 — Commercial 15,353 15,353 — 4,364 24 Secured by 1-4 family — — — — — Consumer — — — — — Leases 2,417 2,417 — 3,233 — Total impaired loans with no allowance recorded $ 83,503 $ 85,935 $ — $ 59,815 $ 60 With an allowance recorded: Commercial Business loans $ 20,983 $ 25,300 $ 5,737 $ 31,131 $ — Energy 70,431 70,431 14,103 6,641 — Construction Market risk — — — — — Real estate Market risk 5,335 5,335 1,066 2,558 — Commercial — — — 306 — Secured by 1-4 family 354 354 125 1,580 — Consumer — — — 10 — Leases 2,734 2,734 2,436 302 — Total impaired loans with an allowance recorded $ 99,837 $ 104,154 $ 23,467 $ 42,528 $ — Combined: Commercial Business loans $ 32,080 $ 38,829 $ 5,737 $ 48,442 $ — Energy 108,399 108,399 14,103 28,432 36 Construction Market risk 16,668 16,668 — 9,764 — Real estate Market risk 5,335 5,335 1,066 5,910 — Commercial 15,353 15,353 — 4,670 24 Secured by 1-4 family 354 354 125 1,580 — Consumer — — — 10 — Leases 5,151 5,151 2,436 3,535 — Total impaired loans $ 183,340 $ 190,089 $ 23,467 $ 102,343 $ 60 Average impaired loans outstanding during the three months ended March 31, 2016 and 2015 totaled $181.1 million and $57.3 million , respectively. The table below provides an age analysis of our loans held for investment as of March 31, 2016 (in thousands): 30-59 Days Past Due 60-89 Days Past Due Greater Than 90 Days and Accruing(1) Total Past Due Non-accrual Current Total Commercial Business loans $ 14,453 $ 11,991 $ 9,727 $ 36,171 $ 24,806 $ 5,798,622 $ 5,859,599 Energy — 2,927 — 2,927 141,291 885,982 1,030,200 Mortgage finance loans — — — — — 4,981,304 4,981,304 Construction Market risk — — — — — 1,950,367 1,950,367 Secured by 1-4 family 410 — — 410 — 7,593 8,003 Real estate Market risk 4,589 — — 4,589 3,544 2,380,148 2,388,281 Commercial 4,137 — — 4,137 2,825 615,858 622,820 Secured by 1-4 family 1,626 1,992 373 3,991 347 121,542 125,880 Consumer 150 37 — 187 — 26,252 26,439 Leases 30 — — 30 343 104,087 104,460 Total loans held for investment $ 25,395 $ 16,947 $ 10,100 $ 52,442 $ 173,156 $ 16,871,755 $ 17,097,353 (1) Loans past due 90 days and still accruing includes premium finance loans of $6.1 million . These loans are generally secured by obligations of insurance carriers to refund premiums on canceled 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 the contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, a reduction of the face amount of debt or forgiveness of either principal or accrued interest. At March 31, 2016 and December 31, 2015 , had $249,000 in loans considered restructured that were not on non-accrual. These loans did not have unfunded commitments at March 31, 2016 or December 31, 2015 . Of the non-accrual loans at March 31, 2016 and December 31, 2015 , $37.9 million and $24.9 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 the modified terms in calendar years after the year of the restructure. The following tables summarize, for the three months ended March 31, 2016 and 2015 , loans that were restructured during 2016 and 2015 (in thousands): March 31, 2016 Number of Restructured Loans Pre-Restructuring Outstanding Recorded Investment Post-Restructuring Outstanding Recorded Investment Energy loans 2 $ 14,235 $ 14,235 Commercial business loans — $ — $ — Total new restructured loans in 2016 2 $ 14,235 $ 14,235 March 31, 2015 Number of Restructured Loans Pre-Restructuring Outstanding Recorded Investment Post-Restructuring Outstanding Recorded Investment Commercial business loans 2 $ 1,369 $ 1,369 Total new restructured loans in 2015 2 $ 1,369 $ 1,369 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, 2016 or 2015 . The following table provides information on how restructured loans were modified during the three months ended March 31, 2016 and 2015 (in thousands): Three months ended March 31, 2016 2015 Extended maturity $ — $ — Adjusted payment schedule 12,916 Combination of maturity extension and payment schedule adjustment 1,319 1,369 Total $ 14,235 $ 1,369 As of March 31, 2016 and 2015 , we did not have any loans that were restructured within the last 12 months that subsequently defaulted.

OREO AND VALUATION ALLOWANCE FO

OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO	3 Months Ended
	Mar. 31, 2016
Real Estate Owned, Disclosure of Detailed Components [Abstract]
OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO	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, 2016 2015 Beginning balance $ 278 $ 568 Additions 17,398 1,092 Sales (91 ) (1,055 ) Valuation allowance for OREO — — Direct write-downs — — Ending balance $ 17,585 $ 605 The addition to OREO relates to the foreclosure of a single commercial property during the three months ended March 31, 2016 .

CERTAIN TRANSFERS OF FINANCIAL

CERTAIN TRANSFERS OF FINANCIAL ASSETS (Notes)	3 Months Ended
	Mar. 31, 2016
Transfers and Servicing [Abstract]
CERTAIN TRANSFERS OF FINANCIAL ASSETS	CERTAIN TRANSFERS OF FINANCIAL ASSETS Through our Mortgage Correspondent Aggregation ("MCA") business, we commit to purchase residential mortgage loans from correspondent lenders and deliver those loans into the secondary market via whole loan sales to independent third parties or in securitization transactions to government sponsored entities ("GSEs") such as Fannie Mae, Freddie Mac or Ginnie Mae. We have elected to carry these loans at fair value based on sales commitments and market quotes. Changes in the fair value of the loans held for sale are included in other non-interest income. Residential mortgage loans are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales contracts, which set the price for loans that will be delivered in the next 60 to 90 days. The table below presents the unpaid principal balance of loans held for sale and related fair values at March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Unpaid Principal Balance 90,006 82,853 Fair Value 94,702 86,075 Fair Value Over/(Under) Unpaid Principal Balance 4,696 3,222 No loans held for sale were 90 days or more past due or considered impaired as of March 31, 2016 and December 31, 2015 , and no credit losses were recognized on loans held for sale for the three months ended March 31, 2016 . The differences between the fair value and the aggregate unpaid principal balance include changes in fair value recorded at and subsequent to purchase, gains and losses on the related loan purchase commitment prior to purchase and premiums or discounts on acquired loans. We generally retain the right to service the loans sold, creating mortgage servicing rights ("MSRs") which are recorded as assets on our balance sheet. A summary of MSR activities for the three months ended March 31, 2016 is as follows (in thousands): Servicing asset: Balance, beginning of year $ 423 Capitalized servicing rights 3,903 Amortization (40 ) Balance, end of period 4,286 Valuation allowance: Balance, beginning of year $ — Increase in valuation allowance $ 33 Balance, end of period $ 33 Fair value $ 4,253 At March 31, 2016 and December 31, 2015 , our servicing portfolio of residential mortgage loans sold included 1,470 and 168 loans, respectively, with an outstanding principal balance of $380.2 million and $39.0 million , respectively. In connection with the servicing of these loans, we maintain escrow funds for taxes and insurance in the name of investors, as well as collections in transit to investors. These escrow funds are segregated and held in separate non-interest-bearing bank accounts at the Bank. These deposits, included in total non-interest-bearing deposits on the consolidated balance sheets, were $2.9 million at March 31, 2016 and $240,000 at December 31, 2015 . For loans securitized and sold for the three months ended March 31, 2016 with servicing rights retained, management used the following assumptions to determine the fair value of MSRs at the date of the securitization or sale: Average discount rates 9.85 % Expected prepayment speeds 10.67 % Weighted-average life, in years 6.5 In conjunction with the sale and securitization of loans held for sale, we may be exposed to liability resulting from recourse agreements and repurchase agreements. If it is determined subsequent to our sale of a loan that the loan sold is in breach of the representations or warranties made in the applicable sale agreement, we may have an obligation to either (a) repurchase the loan for the unpaid principal balance, accrued interest and related advances, (b) indemnify the purchaser against any loss it suffers or (c) make the purchaser whole for the economic benefits of the loan. During the three months ended March 31, 2016 , we originated or purchased and sold approximately $342.6 million of mortgage loans to GSEs. Our repurchase, indemnification and make whole obligations vary based upon the terms of the applicable agreements, the nature of the asserted breach and the status of the mortgage loan at the time a claim is made. We establish reserves for estimated losses of this nature inherent in the origination of mortgage loans by estimating the probable losses inherent in the population of all loans sold based on trends in claims and actual loss severities experienced. The reserve will include accruals for probable contingent losses in addition to those identified in the pipeline of claims received. The estimation process is designed to include amounts based on actual losses experienced from actual repurchase activity. Because the MCA business commenced in late 2015, we have no historical data to support the establishment of a reserve. The baseline for the repurchase reserve uses historical loss factors obtained from industry data that are applied to loan pools originated and sold from September 2015 through March 31, 2016 . The historical industry data loss factors and experienced losses will be accumulated for each sale vintage (year loan was sold) and applied to more recent sale vintages to estimate inherent losses not yet realized. Our estimated exposure related to these loans was $178,000 at March 31, 2016 and is recorded in other liabilities in the consolidated balance sheets. We had no losses due to repurchase, indemnification or make-whole obligations during the three months ended March 31, 2016 .

FINANCIAL INSTRUMENTS WITH OFF-

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK	3 Months Ended
	Mar. 31, 2016
Risks and Uncertainties [Abstract]
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK	FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit that involve varying degrees of credit risk in excess of the amount recognized in the consolidated balance sheets. The Bank’s exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of these instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the borrower. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer’s credit-worthiness on a case-by-case basis. Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands): March 31, 2016 December 31, 2015 Commitments to extend credit $ 5,555,634 $ 5,542,363 Standby letters of credit 191,141 182,219

REGULATORY MATTERS

REGULATORY MATTERS	3 Months Ended
	Mar. 31, 2015
Regulatory Capital Requirements [Abstract]
REGULATORY MATTERS	REGULATORY MATTERS 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. In July 2013, the Federal Reserve published final rules for the adoption of the Basel III regulatory capital framework (the "Basel III Capital Rules"). The Basel III Capital Rules, among other things, (i) introduced a new capital measure called "Common Equity Tier 1" ("CET1"), (ii) specified that Tier 1 capital consist of CET1 and "Additional Tier 1 Capital" instruments meeting specified requirements, (iii) defined CET1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to CET1 and not to the other components of capital and (iv) expanded the scope of the deductions/adjustments as compared to existing regulations. The Basel III Capital Rules became effective for us on January 1, 2015 with certain transition provisions fully phased in on January 1, 2019. Quantitative measures established by these regulations to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of CET1, Tier 1 and total 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, 2016 , that the Company and the Bank met all capital adequacy requirements to which they are subject. Financial institutions are categorized as well capitalized or adequately capitalized, based on minimum total risk-based, Tier 1 risk-based, CET1 and Tier 1 leverage ratios. As shown in the table below, the Company’s capital ratios exceeded the regulatory definition of adequately capitalized as of March 31, 2016 , and December 31, 2015 . Based upon the information in its most recently filed call report, the Bank met the capital ratios necessary to be well capitalized. The regulatory authorities can apply changes in classification of assets and such changes may retroactively subject the Company to changes in capital ratios. Any such changes 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 adverse effect on our financial condition and results of operations. Because our bank had less than $15.0 billion in total consolidated assets as of December 31, 2009, we are allowed to continue to classify our trust preferred securities, all of which were issued prior to May 19, 2010, as Tier 1 capital. The table below summarizes our capital ratios: March 31, December 31, Company Risk-based capital: CET1 7.47 % 7.47 % Tier 1 capital 8.78 % 8.81 % Total capital 11.07 % 11.05 % Leverage 9.10 % 8.92 % Our mortgage finance loan volumes can increase significantly at month-end, causing a meaningful difference between ending balance and average balance for any period. At March 31, 2016 , our total mortgage finance loans were $5.0 billion compared to the average for the quarter ended March 31, 2016 of $3.7 billion . As CET1, Tier 1 and total capital ratios are calculated using quarter-end risk-weighted assets and our mortgage finance loans are 100% risk-weighted, the quarter-end fluctuation in these balances can significantly impact our reported ratios. We manage capital allocated to mortgage finance loans based on changing trends in average balances, as well as the inherent risk associated with the assets which implies a risk weight that is significantly different than the regulatory risk weight, and do not believe that the quarter-end balance is representative of risk characteristics that would justify higher allocations. However, we continue to monitor our capital allocation to confirm that all capital levels remain above well-capitalized levels. 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 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, 2016 or 2015 .

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	3 Months Ended
	Mar. 31, 2016
Compensation Related Costs [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION We have stock-based compensation plans under which equity-based compensation grants are made by the board of directors, or its designated committee. Grants are subject to vesting requirements. Under the plans, we may grant, among other things, nonqualified stock options, incentive stock options, restricted stock units ("RSUs"), stock appreciation rights ("SARs"), cash-based performance units or any combination thereof. Plans include grants for employees and directors. Total shares authorized under the plans are 2,550,000 . The fair value of our 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 employee stock options. Stock-based compensation consists of SARs, RSUs and cash-based performance units granted from 2010 through March 31, 2016 . Three months ended March 31, (in thousands) 2016 2015 Stock- based compensation expense recognized: SARs $ 82 $ 104 RSUs 1,050 887 Cash-based performance units (673 ) 1,366 Total compensation expense recognized $ 459 $ 2,357 March 31, 2016 (in thousands) Options SARs and RSUs Unrecognized compensation expense related to unvested awards $ — $ 12,331 Weighted average period over which expense is expected to be recognized, in years N/A 3.1

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES	FAIR VALUE DISCLOSURES ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and requires enhanced disclosures about fair value measurements. Fair value is defined under ASC 820 as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal market for the asset or liability in an orderly transaction between market participants on the measurement date. We determine the fair market values of our assets and liabilities measured at fair value on a recurring and nonrecurring basis using the fair value hierarchy as prescribed in ASC 820. The standard describes three levels of inputs that may be used to measure fair value as provided below. Level 1 Quoted prices in active markets for identical assets or liabilities. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include U.S. government and agency mortgage-backed debt securities, municipal bonds, and Community Reinvestment Act funds. This category includes loans held for sale and 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, 2016 and December 31, 2015 are as follows (in thousands): Fair Value Measurements Using March 31, 2016 Level 1 Level 2 Level 3 Available for sale securities:(1) Residential mortgage-backed securities $ — $ 20,162 $ — Municipals — 566 — Equity securities(2) — 7,733 — Loans held for sale (3) — 94,702 — Loans held for investment(4) (6) — — 96,494 OREO(5) (6) — — 17,585 Derivative assets(7) — 54,926 — Derivative liabilities(7) — 55,404 — December 31, 2015 Available for sale securities:(1) Residential mortgage-backed securities $ — $ 21,901 $ — Municipals — 831 — Equity securities(2) — 7,260 — Loans held for sale(3) — 86,075 — Loans(4) (6) — — 41,420 OREO(5) (6) — — 278 Derivative assets(7) — 35,292 — Derivative liabilities(7) — 35,420 — (1) Securities are measured at fair value on a recurring basis, generally monthly. (2) Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan. (3) Loans held for sale are measured at fair value on a recurring basis, generally monthly. (4) Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral. (5) OREO is transferred from loans to OREO at fair value less selling costs. (6) Fair value of loans held for investment and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions. (7) 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 held for investment During three months ended March 31, 2016 and the year ended December 31, 2015 , certain impaired loans held for investment were re-evaluated 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 $96.5 million reported fair value above includes impaired loans held for investment at March 31, 2016 with a carrying value of $127.8 million that were reduced by specific allowance allocations totaling $31.3 million based on collateral valuations utilizing Level 3 valuation inputs. The $41.4 million reported fair value above includes impaired loans held for investment at December 31, 2015 with a carrying value of $49.7 million that were reduced by specific valuation allowance allocations totaling $8.3 million based on collateral valuations utilizing Level 3 valuation inputs. Fair values were based on third party appraisals. OREO Certain foreclosed assets, upon initial recognition, are recorded at fair value less estimated selling costs. At March 31, 2016 and December 31, 2015 , OREO had a carrying value of $17.6 million and $278,000 , respectively, with no specific valuation allowance. The fair value of OREO was computed based on third party appraisals, which are Level 3 valuation inputs. Fair Value of Financial Instruments Generally accepted accounting principles require disclosure of fair value information about financial instruments, whether or not recognized on the balance sheet, for which it is practical to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. This disclosure does not and is not intended to represent the fair value of the Company. A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands): March 31, 2016 December 31, 2015 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Cash and cash equivalents $ 2,733,695 $ 2,733,695 $ 1,790,870 $ 1,790,870 Securities, available-for-sale 28,461 28,461 29,992 29,992 Loans held for sale 94,702 94,702 86,075 86,075 Loans held for investment, net 16,878,643 16,894,928 16,570,839 16,576,297 Derivative assets 54,926 54,926 35,292 35,292 Deposits 16,298,847 16,299,367 15,084,619 15,085,080 Federal funds purchased 82,713 82,713 74,164 74,164 Customer repurchase agreements 18,146 18,146 68,887 68,887 Other borrowings 1,604,000 1,604,000 1,500,000 1,500,000 Subordinated notes 280,773 290,561 280,682 285,773 Trust preferred subordinated debentures 113,406 113,406 113,406 113,406 Derivative liabilities 55,404 55,404 35,420 35,420 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 sheets for cash and cash equivalents approximate their fair value, and these financial instruments are characterized as Level 1 assets 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, and these financial instruments are characterized as Level 2 assets 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 held for sale Fair value for loans held for sale valued under the fair value option is derived from quoted market prices for similar loans, and these financial instruments are characterized as Level 2 assets in the fair value hierarchy. Loans held for investment, net Loans held for investment are characterized as Level 3 assets in the fair value hierarchy. For variable-rate loans held for investment 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 held for investment 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. Derivatives The estimated fair value of the interest rate swaps and caps is obtained from independent pricing services based on quoted market prices for the same or similar derivative contracts and these financial instruments are characterized as Level 2 assets in the fair value hierarchy. On a quarterly basis, we independently verify the fair value using an additional independent pricing source. The derivative instruments related to the loans held for sale portfolio include loan purchase commitments and forward sales commitments. Loan purchase commitments are valued based upon the fair value of the underlying mortgage loans to be purchased, which is based on observable market data. Forward sales commitments are valued based upon the quoted market prices from brokers. As such, these loan purchase commitments and forward sales commitments are classified as Level 2 assets in the fair value hierarchy. Deposits Deposits are characterized as Level 3 liabilities in the fair value hierarchy. The carrying amounts for variable-rate money market accounts approximate their fair value. Fixed-term certificates of deposit fair values are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities. Federal funds purchased, customer repurchase agreements, other borrowings, subordinated notes and trust preferred subordinated debentures The carrying value reported in the consolidated balance sheets for Federal funds purchased, customer repurchase agreements and other short-term, floating rate borrowings approximates their fair value, and these financial instruments are characterized as Level 2 assets 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, and these financial instruments are characterized as Level 3 liabilities in the fair value hierarchy. The subordinated notes are publicly, though infrequently, traded and are valued based on market prices, and are characterized as Level 2 liabilities in the fair value hierarchy.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	DERIVATIVE FINANCIAL INSTRUMENTS The fair value of derivative positions outstanding is included in accrued interest receivable and other assets and other liabilities in the accompanying consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty that are subject to a legally enforceable master netting agreement. During three months ended March 31, 2016 and 2015 , we entered into certain interest rate derivative positions that were 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. During three months ended March 31, 2016 , we entered into loan purchase commitment contracts with mortgage originators to purchase residential mortgage loans at a future date, as well as forward sales commitment contracts to sell residential mortgage loans at a future date. The notional amounts and estimated fair values of interest rate derivative positions outstanding at March 31, 2016 and December 31, 2015 are presented in the following tables (in thousands): March 31, 2016 December 31, 2015 Estimated Fair Value Estimated Fair Value Notional Amount Asset Derivative Liability Derivative Notional Amount Asset Derivative Liability Derivative Non-hedging interest rate derivatives: Financial institution counterparties: Commercial loan/lease interest rate swaps $ 980,118 $ — $ 53,948 $ 976,389 $ — $ 33,851 Commercial loan/lease interest rate caps 193,547 589 — 194,304 1,441 — Customer counterparties: Commercial loan/lease interest rate swaps 980,118 53,948 — 976,389 33,851 — Commercial loan/lease interest rate caps 193,547 — 589 194,304 — 1,441 Economic hedging interest rate derivatives: Loan purchase commitments 75,075 389 — 62,835 — 109 Forward sale commitments 159,111 — 867 143,200 — 19 Gross derivatives 54,926 55,404 35,292 35,420 Offsetting derivative assets/liabilities — — — — Net derivatives included in the consolidated balance sheets $ 54,926 $ 55,404 $ 35,292 $ 35,420 The weighted-average receive and pay interest rates for interest rate swaps outstanding at March 31, 2016 and December 31, 2015 were as follows: March 31, 2016 December 31, 2015 Received Paid Received Paid Non-hedging interest rate swaps 2.96 % 4.72 % 2.96 % 4.72 % The weighted-average strike rate for outstanding interest rate caps was 2.34% at March 31, 2016 and 2.34% at December 31, 2015 . 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 $54.9 million at March 31, 2016 and approximately $35.3 million at December 31, 2015 , 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, 2016 and December 31, 2015 , we had $55.7 million and $37.1 million , respectively, in cash collateral pledged for these derivatives included in interest-bearing deposits.

NEW ACCOUNTING PRONOUNCEMENTS

NEW ACCOUNTING PRONOUNCEMENTS	3 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
NEW ACCOUNTING PRONOUNCEMENTS	NEW ACCOUNTING PRONOUNCEMENTS ASU 2016-02 " Leases (Topic 842) " ("ASU 2016-02") requires that lessees and lessors recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. ASU 2016-02 is effective for public companies for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. We have not yet selected a transition method nor have we determined the effect of the standard on our financial statements and disclosures. ASU 2015-03 " Interest - Imputation of Interest (Subtopic 835-30) - Simplifying the Presentation of Debt Issuance Costs " ("ASU 2015-03") requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. Prior to the issuance of ASU 2015-03, debt issuance costs were required to be presented as deferred charge assets, separate from the related debt liability. ASU 2015-03 does not change the recognition and measurement requirements for debt issuance costs. We adopted ASU 2015-03 effective January 1, 2016 and applied its provisions retrospectively. The adoption of ASU 2015-03 resulted in the reclassification of $5.2 million and $5.3 million of unamortized debt issuance costs related to our Subordinated notes from other assets to subordinated notes within the consolidated balance sheets as of March 31, 2016 and December 31, 2015. Other than this reclassification, the adoption of ASU 2015-03 did not have a material impact on our consolidated financial statements. ASU 2014-09 "Revenue from Contracts with Customers (Topic 606)" ("ASU 2014-09") implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 establishes a five-step model which entities must follow to recognize revenue and removes inconsistencies and weaknesses in existing guidance. ASU 2014-09 was originally going to be effective for annual and interim periods beginning after December 15, 2016; however, the FASB issued ASU 2015-14 - "Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date" which deferred the effective date of ASU 2014-09 by one year to annual and interim periods beginning after December 15, 2017. ASU 2014-09 is not expected to have a significant impact on our consolidated financial statements.

Summary of Significant Accounti

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
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 and 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 the interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and 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, 2015 , included in our Annual Report on Form 10-K filed with the SEC on February 18, 2016 (the “2015 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.

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per share	The following table presents the computation of basic and diluted earnings per share (in thousands except per share data): Three months ended 2016 2015 Numerator: Net income $ 25,128 $ 35,050 Preferred stock dividends 2,438 2,438 Net income available to common stockholders $ 22,690 32,612 Denominator: Denominator for basic earnings per share— weighted average shares 45,888,735 45,758,655 Effect of employee stock-based awards (1) 117,372 210,736 Effect of warrants to purchase common stock 348,271 398,479 Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions 46,354,378 46,367,870 Basic earnings per common share $ 0.49 $ 0.71 Diluted earnings per common share $ 0.49 $ 0.70 (1) Stock options, SARs and RSUs outstanding of 308,972 at March 31, 2016 and 168,300 at March 31, 2015 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

SECURITIES (Tables)

SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2016
Available-for-sale Securities [Abstract]
Schedule of summary of securities	At March 31, 2016 , our net unrealized gain on the available-for-sale securities portfolio was $1.1 million compared to $1.1 million at December 31, 2015 . As a percent of outstanding balances, the unrealized gain was 3.90% and 3.83% at March 31, 2016 , and December 31, 2015 , respectively. The increase in the unrealized gain percentage at March 31, 2016 is related to the reduction in the portfolio balance due to paydowns and maturities.
Schedule of amortized cost and estimated fair value of securities	The amortized cost and estimated fair value of available-for-sale securities are presented below by contractual maturity (in thousands, except percentage data): March 31, 2016 Less Than One Year After One Through Five Years After Five Through Ten Years After Ten Years Total Available-for-sale: Residential mortgage-backed securities: (1) Amortized cost $ 203 $ 3,855 $ 3,986 $ 10,872 $ 18,916 Estimated fair value 205 4,003 4,462 11,492 20,162 Weighted average yield (3) 5.57 % 4.72 % 5.54 % 2.54 % 3.36 % Municipals: (2) Amortized cost 275 289 — — 564 Estimated fair value 275 291 — — 566 Weighted average yield (3) 5.61 % 5.76 % — — 5.69 % Equity securities: (4) Amortized cost 7,913 — — — 7,913 Estimated fair value 7,733 — — — 7,733 Total available-for-sale securities: Amortized cost $ 27,393 Estimated fair value $ 28,461 December 31, 2015 Less Than One Year After One Through Five Years After Five Through Ten Years After Ten Years Total Available-for-sale: Residential mortgage-backed securities: (1) Amortized cost $ 214 $ 4,655 $ 4,265 $ 11,402 $ 20,536 Estimated fair value 217 4,837 4,747 12,100 21,901 Weighted average yield (3) 5.62 % 4.71 % 5.54 % 2.53 % 3.68 % Municipals: (2) Amortized cost 265 563 — — 828 Estimated fair value 265 566 — — 831 Weighted average yield (3) 5.46 % 5.69 % — % — % 5.62 % Equity securities: (4) Amortized cost 7,522 — — — 7,522 Estimated fair value 7,260 — — — 7,260 Total available-for-sale securities: Amortized cost $ 28,886 Estimated fair value $ 29,992 (1) Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties. (2) Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate. (3) Yields are calculated based on amortized cost. (4) These equity securities do not have a stated maturity.
Schedule of investment securities that have been in a continuous unrealized loss position for less or more than 12 months	The following table discloses, as of March 31, 2016 and December 31, 2015 , 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): March 31, 2016 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Equity securities $ — $ — $ 6,295 $ (205 ) $ 6,295 $ (205 ) December 31, 2015 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Equity securities $ — $ — $ 6,227 $ (273 ) $ 6,227 $ (273 )

LOANS AND ALLOWANCE FOR LOAN 23

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	3 Months Ended
	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Schedule of loans held for investments	At March 31, 2016 and December 31, 2015 , loans held for investment were as follows (in thousands): March 31, December 31, Commercial $ 6,889,799 $ 6,672,631 Mortgage finance 4,981,304 4,966,276 Construction 1,958,370 1,851,717 Real estate 3,136,981 3,139,197 Consumer 26,439 25,323 Leases 104,460 113,996 Gross loans held for investment 17,097,353 16,769,140 Deferred income (net of direct origination costs) (56,200 ) (57,190 ) Allowance for loan losses (162,510 ) (141,111 ) Total loans held for investment $ 16,878,643 $ 16,570,839
Schedule of the credit risk profile of loan portfolio by internally assigned grades and non-accrual status	The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Grade: Pass $ 6,527,449 $ 4,981,304 $ 1,938,758 $ 3,086,536 $ 26,135 $ 99,275 $ 16,659,457 Special mention 82,333 — 8,047 36,281 1 251 126,913 Substandard-accruing 113,920 — 11,565 7,448 303 4,591 137,827 Non-accrual 166,097 — — 6,716 — 343 173,156 Total loans held for investment $ 6,889,799 $ 4,981,304 $ 1,958,370 $ 3,136,981 $ 26,439 $ 104,460 $ 17,097,353 December 31, 2015 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Grade: Pass $ 6,375,332 $ 4,966,276 $ 1,821,678 $ 3,085,463 $ 25,093 $ 103,560 $ 16,377,402 Special mention 111,911 — 13,090 30,585 3 334 155,923 Substandard-accruing 46,731 — 281 3,837 227 4,951 56,027 Non-accrual 138,657 — 16,668 19,312 — 5,151 179,788 Total loans held for investment $ 6,672,631 $ 4,966,276 $ 1,851,717 $ 3,139,197 $ 25,323 $ 113,996 $ 16,769,140
Schedule of activity in the reserve for loan losses by portfolio segment	The following table details activity in the reserve for loan losses by portfolio segment for the three months ended March 31, 2016 and March 31, 2015 . Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories. March 31, 2016 (in thousands) Commercial Mortgage Finance Construction Real Estate Consumer Leases Additional Qualitative Reserve Total Beginning balance $ 112,446 $ — $ 6,836 $ 13,381 $ 338 $ 3,931 $ 4,179 $ 141,111 Provision for loan losses 26,581 — 1,050 1,134 (15 ) (2,435 ) 2,480 28,795 Charge-offs 8,496 — — — — — — 8,496 Recoveries 1,040 — — 8 7 45 — 1,100 Net charge-offs (recoveries) 7,456 — — (8 ) (7 ) (45 ) — 7,396 Ending balance $ 131,571 $ — $ 7,886 $ 14,523 $ 330 $ 1,541 $ 6,659 $ 162,510 Period end amount allocated to: Loans individually evaluated for impairment $ 31,415 $ — $ — $ 1,183 $ — $ 51 $ — $ 32,649 Loans collectively evaluated for impairment 100,156 — 7,886 13,340 330 1,490 6,659 129,861 Ending balance $ 131,571 $ — $ 7,886 $ 14,523 $ 330 $ 1,541 $ 6,659 $ 162,510 March 31, 2015 (in thousands) Commercial Mortgage Finance Construction Real Estate Consumer Leases Additional Qualitative Reserve Total Beginning balance $ 70,654 $ — $ 7,935 $ 15,582 $ 240 $ 1,141 $ 5,402 $ 100,954 Provision for loan losses 23,375 — (3,472 ) (5,601 ) 149 (138 ) (4,068 ) 10,245 Charge-offs 3,102 — — 346 62 — — 3,510 Recoveries 286 — 83 8 4 8 — 389 Net charge-offs (recoveries) 2,816 — (83 ) 338 58 (8 ) — 3,121 Ending balance $ 91,213 $ — $ 4,546 $ 9,643 $ 331 $ 1,011 $ 1,334 $ 108,078 Period end amount allocated to: Loans individually evaluated for impairment $ 10,958 $ — $ — $ 248 $ — $ 26 $ — $ 11,232 Loans collectively evaluated for impairment 80,255 — 4,546 9,395 331 985 1,334 96,846 Ending balance $ 91,213 $ — $ 4,546 $ 9,643 $ 331 $ 1,011 $ 1,334 $ 108,078
Schedule of recorded investment in loans related to each balance in the allowance for loan losses	Our recorded investment in loans as of March 31, 2016 , December 31, 2015 and March 31, 2015 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): March 31, 2016 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Loans individually evaluated for impairment $ 167,832 $ — $ — $ 8,397 $ — $ 343 $ 176,572 Loans collectively evaluated for impairment 6,721,967 4,981,304 1,958,370 3,128,584 26,439 104,117 16,920,781 Total $ 6,889,799 $ 4,981,304 $ 1,958,370 $ 3,136,981 $ 26,439 $ 104,460 $ 17,097,353 December 31, 2015 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Loans individually evaluated for impairment $ 140,479 $ — $ 16,668 $ 21,042 $ — $ 5,151 $ 183,340 Loans collectively evaluated for impairment 6,532,152 4,966,276 1,835,049 3,118,155 25,323 108,845 16,585,800 Total $ 6,672,631 $ 4,966,276 $ 1,851,717 $ 3,139,197 $ 25,323 $ 113,996 $ 16,769,140 March 31, 2015 Commercial Mortgage Finance Construction Real Estate Consumer Leases Total Loans individually evaluated for impairment $ 61,233 $ — $ — $ 11,910 $ — $ 172 $ 73,315 Loans collectively evaluated for impairment 6,127,725 5,408,750 1,559,545 2,945,876 17,868 92,879 16,152,643 Total $ 6,188,958 $ 5,408,750 $ 1,559,545 $ 2,957,786 $ 17,868 $ 93,051 $ 16,225,958
Schedule of impaired loans, by portfolio class	The following tables detail our impaired loans, by portfolio class, as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial Business loans $ 6,494 $ 8,927 $ — $ 9,563 $ — Energy 41,230 41,230 — 39,055 — Construction Market risk — — — 11,112 — Real estate Market risk — — — — — Commercial 2,825 2,825 — 11,177 8 Secured by 1-4 family — — — — — Consumer — — — — — Leases — — — 1,611 — Total impaired loans with no allowance recorded $ 50,549 $ 52,982 $ — $ 72,518 $ 8 With an allowance recorded: Commercial Business loans $ 20,047 $ 26,803 $ 3,774 $ 20,671 $ — Energy 100,061 105,927 27,641 80,308 7 Construction Market risk — — — — — Real estate Market risk 5,225 5,225 1,061 5,298 — Commercial — — — — — Secured by 1-4 family 347 347 122 352 — Consumer — — — — — Leases 343 343 51 1,937 — Total impaired loans with an allowance recorded $ 126,023 $ 138,645 $ 32,649 $ 108,566 $ 7 Combined: Commercial Business loans $ 26,541 $ 35,730 $ 3,774 $ 30,234 $ — Energy 141,291 147,157 27,641 119,363 7 Construction Market risk — — — 11,112 — Real estate Market risk 5,225 5,225 1,061 5,298 — Commercial 2,825 2,825 — 11,177 8 Secured by 1-4 family 347 347 122 352 — Consumer — — — — — Leases 343 343 51 3,548 — Total impaired loans $ 176,572 $ 191,627 $ 32,649 $ 181,084 $ 15 December 31, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial Business loans $ 11,097 $ 13,529 $ — $ 17,311 $ — Energy 37,968 37,968 — 21,791 36 Construction Market risk 16,668 16,668 — 9,764 — Real estate Market risk — — — 3,352 — Commercial 15,353 15,353 — 4,364 24 Secured by 1-4 family — — — — — Consumer — — — — — Leases 2,417 2,417 — 3,233 — Total impaired loans with no allowance recorded $ 83,503 $ 85,935 $ — $ 59,815 $ 60 With an allowance recorded: Commercial Business loans $ 20,983 $ 25,300 $ 5,737 $ 31,131 $ — Energy 70,431 70,431 14,103 6,641 — Construction Market risk — — — — — Real estate Market risk 5,335 5,335 1,066 2,558 — Commercial — — — 306 — Secured by 1-4 family 354 354 125 1,580 — Consumer — — — 10 — Leases 2,734 2,734 2,436 302 — Total impaired loans with an allowance recorded $ 99,837 $ 104,154 $ 23,467 $ 42,528 $ — Combined: Commercial Business loans $ 32,080 $ 38,829 $ 5,737 $ 48,442 $ — Energy 108,399 108,399 14,103 28,432 36 Construction Market risk 16,668 16,668 — 9,764 — Real estate Market risk 5,335 5,335 1,066 5,910 — Commercial 15,353 15,353 — 4,670 24 Secured by 1-4 family 354 354 125 1,580 — Consumer — — — 10 — Leases 5,151 5,151 2,436 3,535 — Total impaired loans $ 183,340 $ 190,089 $ 23,467 $ 102,343 $ 60
Schedule of an age analysis of accruing past due loans	The table below provides an age analysis of our loans held for investment as of March 31, 2016 (in thousands): 30-59 Days Past Due 60-89 Days Past Due Greater Than 90 Days and Accruing(1) Total Past Due Non-accrual Current Total Commercial Business loans $ 14,453 $ 11,991 $ 9,727 $ 36,171 $ 24,806 $ 5,798,622 $ 5,859,599 Energy — 2,927 — 2,927 141,291 885,982 1,030,200 Mortgage finance loans — — — — — 4,981,304 4,981,304 Construction Market risk — — — — — 1,950,367 1,950,367 Secured by 1-4 family 410 — — 410 — 7,593 8,003 Real estate Market risk 4,589 — — 4,589 3,544 2,380,148 2,388,281 Commercial 4,137 — — 4,137 2,825 615,858 622,820 Secured by 1-4 family 1,626 1,992 373 3,991 347 121,542 125,880 Consumer 150 37 — 187 — 26,252 26,439 Leases 30 — — 30 343 104,087 104,460 Total loans held for investment $ 25,395 $ 16,947 $ 10,100 $ 52,442 $ 173,156 $ 16,871,755 $ 17,097,353 (1) Loans past due 90 days and still accruing includes premium finance loans of $6.1 million . These loans are generally secured by obligations of insurance carriers to refund premiums on canceled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.
Schedule of loans that have been restructured	The following tables summarize, for the three months ended March 31, 2016 and 2015 , loans that were restructured during 2016 and 2015 (in thousands): March 31, 2016 Number of Restructured Loans Pre-Restructuring Outstanding Recorded Investment Post-Restructuring Outstanding Recorded Investment Energy loans 2 $ 14,235 $ 14,235 Commercial business loans — $ — $ — Total new restructured loans in 2016 2 $ 14,235 $ 14,235 March 31, 2015 Number of Restructured Loans Pre-Restructuring Outstanding Recorded Investment Post-Restructuring Outstanding Recorded Investment Commercial business loans 2 $ 1,369 $ 1,369 Total new restructured loans in 2015 2 $ 1,369 $ 1,369 The following table provides information on how restructured loans were modified during the three months ended March 31, 2016 and 2015 (in thousands): Three months ended March 31, 2016 2015 Extended maturity $ — $ — Adjusted payment schedule 12,916 Combination of maturity extension and payment schedule adjustment 1,319 1,369 Total $ 14,235 $ 1,369

OREO AND VALUATION ALLOWANCE 24

OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO (Tables)	3 Months Ended
	Mar. 31, 2016
Real Estate Owned, Disclosure of Detailed Components [Abstract]
Schedule of the activity related to OREO	The table below presents a summary of the activity related to OREO (in thousands): Three months ended March 31, 2016 2015 Beginning balance $ 278 $ 568 Additions 17,398 1,092 Sales (91 ) (1,055 ) Valuation allowance for OREO — — Direct write-downs — — Ending balance $ 17,585 $ 605 The addition to OREO relates to the foreclosure of a single commercial property during the three months ended March 31, 2016 .

CERTAIN TRANSFERS OF FINANCIA25

CERTAIN TRANSFERS OF FINANCIAL ASSETS (Tables)	3 Months Ended
	Mar. 31, 2016
Transfers and Servicing [Abstract]
Schedule of Loans Held for Sale	The table below presents the unpaid principal balance of loans held for sale and related fair values at March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Unpaid Principal Balance 90,006 82,853 Fair Value 94,702 86,075 Fair Value Over/(Under) Unpaid Principal Balance 4,696 3,222
Servicing Asset at Amortized Cost	We generally retain the right to service the loans sold, creating mortgage servicing rights ("MSRs") which are recorded as assets on our balance sheet. A summary of MSR activities for the three months ended March 31, 2016 is as follows (in thousands): Servicing asset: Balance, beginning of year $ 423 Capitalized servicing rights 3,903 Amortization (40 ) Balance, end of period 4,286 Valuation allowance: Balance, beginning of year $ — Increase in valuation allowance $ 33 Balance, end of period $ 33 Fair value $ 4,253
Schedule of Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities	For loans securitized and sold for the three months ended March 31, 2016 with servicing rights retained, management used the following assumptions to determine the fair value of MSRs at the date of the securitization or sale: Average discount rates 9.85 % Expected prepayment speeds 10.67 % Weighted-average life, in years 6.5

FINANCIAL INSTRUMENTS WITH OF26

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Tables)	3 Months Ended
	Mar. 31, 2016
Risks and Uncertainties [Abstract]
Schedule of financial instruments with off-balance sheet risk	The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands): March 31, 2016 December 31, 2015 Commitments to extend credit $ 5,555,634 $ 5,542,363 Standby letters of credit 191,141 182,219

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	3 Months Ended
	Mar. 31, 2016
Regulatory Capital Requirements [Abstract]
Schedule of capital ratios	The table below summarizes our capital ratios: March 31, December 31, Company Risk-based capital: CET1 7.47 % 7.47 % Tier 1 capital 8.78 % 8.81 % Total capital 11.07 % 11.05 % Leverage 9.10 % 8.92 %

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	3 Months Ended
	Mar. 31, 2016
Compensation Related Costs [Abstract]
Schedule of stock-based compensation costs	Stock-based compensation consists of SARs, RSUs and cash-based performance units granted from 2010 through March 31, 2016 . Three months ended March 31, (in thousands) 2016 2015 Stock- based compensation expense recognized: SARs $ 82 $ 104 RSUs 1,050 887 Cash-based performance units (673 ) 1,366 Total compensation expense recognized $ 459 $ 2,357
Schedule of unrecognized compensation costs	March 31, 2016 (in thousands) Options SARs and RSUs Unrecognized compensation expense related to unvested awards $ — $ 12,331 Weighted average period over which expense is expected to be recognized, in years N/A 3.1

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured at fair value	Assets and liabilities measured at fair value at March 31, 2016 and December 31, 2015 are as follows (in thousands): Fair Value Measurements Using March 31, 2016 Level 1 Level 2 Level 3 Available for sale securities:(1) Residential mortgage-backed securities $ — $ 20,162 $ — Municipals — 566 — Equity securities(2) — 7,733 — Loans held for sale (3) — 94,702 — Loans held for investment(4) (6) — — 96,494 OREO(5) (6) — — 17,585 Derivative assets(7) — 54,926 — Derivative liabilities(7) — 55,404 — December 31, 2015 Available for sale securities:(1) Residential mortgage-backed securities $ — $ 21,901 $ — Municipals — 831 — Equity securities(2) — 7,260 — Loans held for sale(3) — 86,075 — Loans(4) (6) — — 41,420 OREO(5) (6) — — 278 Derivative assets(7) — 35,292 — Derivative liabilities(7) — 35,420 — (1) Securities are measured at fair value on a recurring basis, generally monthly. (2) Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan. (3) Loans held for sale are measured at fair value on a recurring basis, generally monthly. (4) Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral. (5) OREO is transferred from loans to OREO at fair value less selling costs. (6) Fair value of loans held for investment and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions. (7) Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.
Summary of the carrying amounts and estimated fair values of financial instruments	A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands): March 31, 2016 December 31, 2015 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Cash and cash equivalents $ 2,733,695 $ 2,733,695 $ 1,790,870 $ 1,790,870 Securities, available-for-sale 28,461 28,461 29,992 29,992 Loans held for sale 94,702 94,702 86,075 86,075 Loans held for investment, net 16,878,643 16,894,928 16,570,839 16,576,297 Derivative assets 54,926 54,926 35,292 35,292 Deposits 16,298,847 16,299,367 15,084,619 15,085,080 Federal funds purchased 82,713 82,713 74,164 74,164 Customer repurchase agreements 18,146 18,146 68,887 68,887 Other borrowings 1,604,000 1,604,000 1,500,000 1,500,000 Subordinated notes 280,773 290,561 280,682 285,773 Trust preferred subordinated debentures 113,406 113,406 113,406 113,406 Derivative liabilities 55,404 55,404 35,420 35,420

DERIVATIVE FINANCIAL INSTRUME30

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of notional amounts and estimated fair values of interest rate derivative positions	The notional amounts and estimated fair values of interest rate derivative positions outstanding at March 31, 2016 and December 31, 2015 are presented in the following tables (in thousands): March 31, 2016 December 31, 2015 Estimated Fair Value Estimated Fair Value Notional Amount Asset Derivative Liability Derivative Notional Amount Asset Derivative Liability Derivative Non-hedging interest rate derivatives: Financial institution counterparties: Commercial loan/lease interest rate swaps $ 980,118 $ — $ 53,948 $ 976,389 $ — $ 33,851 Commercial loan/lease interest rate caps 193,547 589 — 194,304 1,441 — Customer counterparties: Commercial loan/lease interest rate swaps 980,118 53,948 — 976,389 33,851 — Commercial loan/lease interest rate caps 193,547 — 589 194,304 — 1,441 Economic hedging interest rate derivatives: Loan purchase commitments 75,075 389 — 62,835 — 109 Forward sale commitments 159,111 — 867 143,200 — 19 Gross derivatives 54,926 55,404 35,292 35,420 Offsetting derivative assets/liabilities — — — — Net derivatives included in the consolidated balance sheets $ 54,926 $ 55,404 $ 35,292 $ 35,420
Schedule of the weighted-average receive and pay interest rate swaps	The weighted-average receive and pay interest rates for interest rate swaps outstanding at March 31, 2016 and December 31, 2015 were as follows: March 31, 2016 December 31, 2015 Received Paid Received Paid Non-hedging interest rate swaps 2.96 % 4.72 % 2.96 % 4.72 %

EARNINGS PER COMMON SHARE (Deta

EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income		$ 25,128	$ 35,050
Preferred stock dividends		(2,438)	(2,438)
Net income available to common stockholders		$ 22,690	$ 32,612
Denominator:
Denominator for basic earnings per share— weighted average shares		45,888,735	45,758,655
Effect of employee stock-based awards	[1]	117,372	210,736
Effect of warrants to purchase common stock		348,271	398,479
Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions		46,354,378	46,367,870
Basic earnings per common share (usd per share)		$ 0.49	$ 0.71
Diluted earnings per common share (usd per share)		$ 0.49	$ 0.70
Stock options, SARs and RSUs excluded from computation of diluted EPS		308,972	168,300
[1]	Stock options, SARs and RSUs outstanding of 308,972 at March 31, 2016 and 168,300 at March 31, 2015 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

SECURITIES (Details)

SECURITIES (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Available-for-sale Securities [Abstract]
Available-for-sale securities, net unrealized gains		$ 1,100	$ 1,100
Available for sale securities, net unrealized gain as percent of outstanding balances		3.90%	3.83%
Summary of Available-for-Sale Securities
Amortized Cost		$ 27,393	$ 28,886
Gross Unrealized Gains		1,273	1,379
Gross Unrealized Losses		(205)	(273)
Estimated Fair Value		28,461	29,992
Residential mortgage-backed securities
Summary of Available-for-Sale Securities
Amortized Cost	[1]	18,916	20,536
Gross Unrealized Gains		1,246	1,365
Gross Unrealized Losses		0	0
Estimated Fair Value	[1]	20,162	21,901
Municipals
Summary of Available-for-Sale Securities
Amortized Cost	[2]	564	828
Gross Unrealized Gains		2	3
Gross Unrealized Losses		0	0
Estimated Fair Value	[2]	566	831
Equity securities
Summary of Available-for-Sale Securities
Amortized Cost	[3],[4]	7,913	7,522
Gross Unrealized Gains	[3]	25	11
Gross Unrealized Losses	[3]	(205)	(273)
Estimated Fair Value	[3],[4]	$ 7,733	$ 7,260
[1]	Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.
[2]	Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.
[3]	Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan.
[4]	These equity securities do not have a stated maturity.

SECURITIES (Details 1)

SECURITIES (Details 1) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Total		$ 27,393	$ 28,886
Estimated Fair Value		$ 28,461	$ 29,992
Available-for-sale Securities, Other Disclosure Items
Federal tax rate		35.00%	35.00%
Available-for-sale securities pledged as collateral		$ 18,800
Residential mortgage-backed securities
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Less Than One Year	[1]	203	$ 214
Amortized cost, After One Through Five Years	[1]	3,855	4,655
Amortized cost, After Five Through Ten Years	[1]	3,986	4,265
Amortized cost, After Ten Years	[1]	10,872	11,402
Amortized cost, Total	[1]	18,916	20,536
Estimated fair value, Less Than One Year	[1]	205	217
Estimated fair value, After One Through Five Years	[1]	4,003	4,837
Estimated fair value, After Five Through Ten Years	[1]	4,462	4,747
Estimated fair value, After Ten Years	[1]	11,492	12,100
Estimated Fair Value	[1]	$ 20,162	$ 21,901
Weighted average yield, Less Than One Year	[1],[2]	5.57%	5.62%
Weighted average yield, After One Through Five Years	[1],[2]	4.72%	4.71%
Weighted average yield, After Five Through Ten Years	[1],[2]	5.54%	5.54%
Weighted average yield, After Ten Years	[1],[2]	2.54%	2.53%
Weighted average yield, Total	[1],[2]	3.36%	3.68%
Municipals
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Less Than One Year	[3]	$ 275	$ 265
Amortized cost, After One Through Five Years	[3]	289	563
Amortized cost, After Five Through Ten Years	[3]	0	0
Amortized cost, After Ten Years	[3]	0	0
Amortized cost, Total	[3]	564	828
Estimated fair value, Less Than One Year	[3]	275	265
Estimated fair value, After One Through Five Years	[3]	291	566
Estimated fair value, After Five Through Ten Years	[3]	0	0
Estimated fair value, After Ten Years	[3]	0	0
Estimated Fair Value	[3]	$ 566	$ 831
Weighted average yield, Less Than One Year	[2],[3]	5.61%	5.46%
Weighted average yield, After One Through Five Years	[2],[3]	5.76%	5.69%
Weighted average yield, After Five Through Ten Years	[2],[3]	0.00%	0.00%
Weighted average yield, After Ten Years	[2],[3]	0.00%	0.00%
Weighted average yield, Total	[2],[3]	5.69%	5.62%
Equity securities
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Less Than One Year	[4]	$ 7,913	$ 7,522
Amortized cost, After One Through Five Years	[4]	0	0
Amortized cost, After Five Through Ten Years	[4]	0	0
Amortized cost, After Ten Years	[4]	0	0
Amortized cost, Total	[4],[5]	7,913	7,522
Estimated fair value, Less Than One Year	[4]	7,733	7,260
Estimated fair value, After One Through Five Years	[4]	0	0
Estimated fair value, After Five Through Ten Years	[4]	0	0
Estimated fair value, After Ten Years	[4]	0	0
Estimated Fair Value	[4],[5]	7,733	$ 7,260
Deposits
Available-for-sale Securities, Other Disclosure Items
Available-for-sale securities pledged as collateral		5,800
Repurchase agreements
Available-for-sale Securities, Other Disclosure Items
Available-for-sale securities pledged as collateral		$ 13,000
[1]	Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.
[2]	Yields are calculated based on amortized cost.
[3]	Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.
[4]	These equity securities do not have a stated maturity.
[5]	Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan.

SECURITIES (Details 2)

SECURITIES (Details 2) - Equity securities - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Continuous Unrealized Loss Position
Fair Value, Less Than 12 Months	$ 0	$ 0
Unrealized Loss, Less Than 12 Months	0	0
Fair Value, 12 Months or Longer	6,295	6,227
Unrealized Loss, 12 Months or Longer	(205)	(273)
Fair Value, Total	6,295	6,227
Unrealized Loss, Total	$ (205)	$ (273)

LOANS AND ALLOWANCE FOR LOAN 35

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Loans and Leases Receivable, Net Reported Amount
Commercial	$ 6,889,799	$ 6,672,631
Mortgage finance	4,981,304	4,966,276
Construction	1,958,370	1,851,717
Real estate	3,136,981	3,139,197
Consumer	26,439	25,323
Leases	104,460	113,996
Gross loans held for investment	17,097,353	16,769,140	$ 16,225,958
Deferred income (net of direct origination costs)	(56,200)	(57,190)
Allowance for loan losses	(162,510)	(141,111)	$ (108,078)	$ (100,954)
Loans held for investment, net	16,878,643	16,570,839
Participating mortgage finance loans	$ 515,400	$ 454,800

LOANS AND ALLOWANCE FOR LOAN 36

LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Risk Profile (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Commercial	$ 6,889,799	$ 6,672,631
Mortgage finance	4,981,304	4,966,276
Construction	1,958,370	1,851,717
Real estate	3,136,981	3,139,197
Consumer	26,439	25,323
Leases	104,460	113,996
Gross loans held for investment	17,097,353	16,769,140	$ 16,225,958
Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial	6,527,449	6,375,332
Mortgage finance	4,981,304	4,966,276
Construction	1,938,758	1,821,678
Real estate	3,086,536	3,085,463
Consumer	26,135	25,093
Leases	99,275	103,560
Gross loans held for investment	16,659,457	16,377,402
Special mention
Financing Receivable, Recorded Investment [Line Items]
Commercial	82,333	111,911
Mortgage finance	0	0
Construction	8,047	13,090
Real estate	36,281	30,585
Consumer	1	3
Leases	251	334
Gross loans held for investment	126,913	155,923
Substandard-accruing
Financing Receivable, Recorded Investment [Line Items]
Commercial	113,920	46,731
Mortgage finance	0	0
Construction	11,565	281
Real estate	7,448	3,837
Consumer	303	227
Leases	4,591	4,951
Gross loans held for investment	137,827	56,027
Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Commercial	166,097	138,657
Mortgage finance	0	0
Construction	0	16,668
Real estate	6,716	19,312
Consumer	0	0
Leases	343	5,151
Gross loans held for investment	$ 173,156	$ 179,788

LOANS AND ALLOWANCE FOR LOAN 37

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Reserve for loan losses:
Beginning balance	$ 141,111	$ 100,954
Provision for loan losses	28,795	10,245
Charge-offs	8,496	3,510
Recoveries	1,100	389
Net charge-offs (recoveries)	7,396	3,121
Period end amount allocated to:
Loans individually evaluated for impairment			$ 32,649	$ 11,232
Loans collectively evaluated for impairment			129,861	96,846
Ending balance	141,111	100,954	162,510	108,078
Commercial
Reserve for loan losses:
Beginning balance	112,446	70,654
Provision for loan losses	26,581	23,375
Charge-offs	8,496	3,102
Recoveries	1,040	286
Net charge-offs (recoveries)	7,456	2,816
Period end amount allocated to:
Loans individually evaluated for impairment			31,415	10,958
Loans collectively evaluated for impairment			100,156	80,255
Ending balance	112,446	70,654	131,571	91,213
Mortgage finance loans
Reserve for loan losses:
Beginning balance	0	0
Provision for loan losses	0	0
Charge-offs	0	0
Recoveries	0	0
Net charge-offs (recoveries)	0	0
Period end amount allocated to:
Loans individually evaluated for impairment			0	0
Loans collectively evaluated for impairment			0	0
Ending balance	0	0	0	0
Construction
Reserve for loan losses:
Beginning balance	6,836	7,935
Provision for loan losses	1,050	(3,472)
Charge-offs	0	0
Recoveries	0	83
Net charge-offs (recoveries)	0	(83)
Period end amount allocated to:
Loans individually evaluated for impairment			0	0
Loans collectively evaluated for impairment			7,886	4,546
Ending balance	6,836	7,935	7,886	4,546
Real Estate
Reserve for loan losses:
Beginning balance	13,381	15,582
Provision for loan losses	1,134	(5,601)
Charge-offs	0	346
Recoveries	8	8
Net charge-offs (recoveries)	(8)	338
Period end amount allocated to:
Loans individually evaluated for impairment			1,183	248
Loans collectively evaluated for impairment			13,340	9,395
Ending balance	13,381	15,582	14,523	9,643
Consumer
Reserve for loan losses:
Beginning balance	338	240
Provision for loan losses	(15)	149
Charge-offs	0	62
Recoveries	7	4
Net charge-offs (recoveries)	(7)	58
Period end amount allocated to:
Loans individually evaluated for impairment			0	0
Loans collectively evaluated for impairment			330	331
Ending balance	338	240	330	331
Leases
Reserve for loan losses:
Beginning balance	3,931	1,141
Provision for loan losses	(2,435)	(138)
Charge-offs	0	0
Recoveries	45	8
Net charge-offs (recoveries)	(45)	(8)
Period end amount allocated to:
Loans individually evaluated for impairment			51	26
Loans collectively evaluated for impairment			1,490	985
Ending balance	3,931	1,141	1,541	1,011
Unallocated
Reserve for loan losses:
Beginning balance	4,179	5,402
Provision for loan losses	2,480	(4,068)
Charge-offs	0	0
Recoveries	0	0
Net charge-offs (recoveries)	0	0
Period end amount allocated to:
Loans individually evaluated for impairment			0	0
Loans collectively evaluated for impairment			6,659	1,334
Ending balance	$ 4,179	$ 5,402	$ 6,659	$ 1,334

LOANS AND ALLOWANCE FOR LOAN 38

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	$ 176,572	$ 183,340	$ 73,315
Loans collectively evaluated for impairment	16,920,781	16,585,800	16,152,643
Gross loans held for investment	17,097,353	16,769,140	16,225,958
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	167,832	140,479	61,233
Loans collectively evaluated for impairment	6,721,967	6,532,152	6,127,725
Gross loans held for investment	6,889,799	6,672,631	6,188,958
Mortgage finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	4,981,304	4,966,276	5,408,750
Gross loans held for investment	4,981,304	4,966,276	5,408,750
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	0	16,668	0
Loans collectively evaluated for impairment	1,958,370	1,835,049	1,559,545
Gross loans held for investment	1,958,370	1,851,717	1,559,545
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	8,397	21,042	11,910
Loans collectively evaluated for impairment	3,128,584	3,118,155	2,945,876
Gross loans held for investment	3,136,981	3,139,197	2,957,786
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	26,439	25,323	17,868
Gross loans held for investment	26,439	25,323	17,868
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	343	5,151	172
Loans collectively evaluated for impairment	104,117	108,845	92,879
Gross loans held for investment	$ 104,460	$ 113,996	$ 93,051

LOANS AND ALLOWANCE FOR LOAN 39

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Non-accrual loans earning on a cash basis	$ 824	$ 884

LOANS AND ALLOWANCE FOR LOAN 40

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 5) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Commercial business loans | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment			$ 37,968
With no related allowance recorded:
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 50,549		83,503
Unpaid principal balance	52,982		85,935
Related allowance	0		0
Average recorded investment	72,518		59,815
Interest income recognized	8		60
With no related allowance recorded: | Commercial business loans | Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment	6,494		11,097
Unpaid principal balance	8,927		13,529
Related allowance	0		0
Average recorded investment	9,563		17,311
Interest income recognized	0		0
With no related allowance recorded: | Commercial business loans | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment	41,230
Unpaid principal balance	41,230		37,968
Related allowance	0		0
Average recorded investment	39,055		21,791
Interest income recognized	0		36
With no related allowance recorded: | Construction | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		16,668
Unpaid principal balance	0		16,668
Related allowance	0		0
Average recorded investment	11,112		9,764
Interest income recognized	0		0
With no related allowance recorded: | Real estate | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		3,352
Interest income recognized	0		0
With no related allowance recorded: | Real estate | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment	2,825		15,353
Unpaid principal balance	2,825		15,353
Related allowance	0		0
Average recorded investment	11,177		4,364
Interest income recognized	8		24
With no related allowance recorded: | Real estate | Secured by 1-4 family
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		0
Interest income recognized	0		0
With no related allowance recorded: | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		0
Interest income recognized	0		0
With no related allowance recorded: | Leases
Financing Receivable, Impaired [Line Items]
Recorded investment	0		2,417
Unpaid principal balance	0		2,417
Related allowance	0		0
Average recorded investment	1,611		3,233
Interest income recognized	0		0
With an allowance recorded:
Financing Receivable, Impaired [Line Items]
Recorded investment	126,023		99,837
Unpaid principal balance	138,645		104,154
Related allowance	32,649		23,467
Average recorded investment	108,566		42,528
Interest income recognized	7		0
With an allowance recorded: | Commercial business loans | Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment	20,047		20,983
Unpaid principal balance	26,803		25,300
Related allowance	3,774		5,737
Average recorded investment	20,671		31,131
Interest income recognized	0		0
With an allowance recorded: | Commercial business loans | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment	100,061		70,431
Unpaid principal balance	105,927		70,431
Related allowance	27,641		14,103
Average recorded investment	80,308		6,641
Interest income recognized	7		0
With an allowance recorded: | Construction | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		0
Interest income recognized	0		0
With an allowance recorded: | Real estate | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	5,225		5,335
Unpaid principal balance	5,225		5,335
Related allowance	1,061		1,066
Average recorded investment	5,298		2,558
Interest income recognized	0		0
With an allowance recorded: | Real estate | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		306
Interest income recognized	0		0
With an allowance recorded: | Real estate | Secured by 1-4 family
Financing Receivable, Impaired [Line Items]
Recorded investment	347		354
Unpaid principal balance	347		354
Related allowance	122		125
Average recorded investment	352		1,580
Interest income recognized	0		0
With an allowance recorded: | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		10
Interest income recognized	0		0
With an allowance recorded: | Leases
Financing Receivable, Impaired [Line Items]
Recorded investment	343		2,734
Unpaid principal balance	343		2,734
Related allowance	51		2,436
Average recorded investment	1,937		302
Interest income recognized	0		0
Combined:
Financing Receivable, Impaired [Line Items]
Recorded investment	176,572		183,340
Unpaid principal balance	191,627		190,089
Related allowance	32,649		23,467
Average recorded investment	181,084	$ 57,300	102,343
Interest income recognized	15		60
Combined: | Commercial business loans | Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment	26,541		32,080
Unpaid principal balance	35,730		38,829
Related allowance	3,774		5,737
Average recorded investment	30,234		48,442
Interest income recognized	0		0
Combined: | Commercial business loans | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment	141,291		108,399
Unpaid principal balance	147,157		108,399
Related allowance	27,641		14,103
Average recorded investment	119,363		28,432
Interest income recognized	7		36
Combined: | Construction | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		16,668
Unpaid principal balance	0		16,668
Related allowance	0		0
Average recorded investment	11,112		9,764
Interest income recognized	0		0
Combined: | Real estate | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	5,225		5,335
Unpaid principal balance	5,225		5,335
Related allowance	1,061		1,066
Average recorded investment	5,298		5,910
Interest income recognized	0		0
Combined: | Real estate | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment	2,825		15,353
Unpaid principal balance	2,825		15,353
Related allowance	0		0
Average recorded investment	11,177		4,670
Interest income recognized	8		24
Combined: | Real estate | Secured by 1-4 family
Financing Receivable, Impaired [Line Items]
Recorded investment	347		354
Unpaid principal balance	347		354
Related allowance	122		125
Average recorded investment	352		1,580
Interest income recognized	0		0
Combined: | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		10
Interest income recognized	0		0
Combined: | Leases
Financing Receivable, Impaired [Line Items]
Recorded investment	343		5,151
Unpaid principal balance	343		5,151
Related allowance	51		2,436
Average recorded investment	3,548		3,535
Interest income recognized	$ 0		$ 0

LOANS AND ALLOWANCE FOR LOAN 41

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 6) $ in Thousands	Mar. 31, 2016USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 52,442
Non-accrual	173,156
Current	16,871,755
Total	17,097,353
Premium finance loans past due 90 days and still accruing	6,100
Commercial business loans | Business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	36,171
Non-accrual	24,806
Current	5,798,622
Total	5,859,599
Commercial business loans | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,927
Non-accrual	141,291
Current	885,982
Total	1,030,200
Mortgage finance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
Non-accrual	0
Current	4,981,304
Total	4,981,304
Construction | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
Non-accrual	0
Current	1,950,367
Total	1,950,367
Construction | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	410
Non-accrual	0
Current	7,593
Total	8,003
Real estate | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,589
Non-accrual	3,544
Current	2,380,148
Total	2,388,281
Real estate | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,991
Non-accrual	347
Current	121,542
Total	125,880
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,137
Non-accrual	2,825
Current	615,858
Total	622,820
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	187
Non-accrual	0
Current	26,252
Total	26,439
Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	30
Non-accrual	343
Current	104,087
Total	104,460
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	25,395
30-59 Days Past Due | Commercial business loans | Business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	14,453
30-59 Days Past Due | Commercial business loans | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
30-59 Days Past Due | Mortgage finance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
30-59 Days Past Due | Construction | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
30-59 Days Past Due | Construction | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	410
30-59 Days Past Due | Real estate | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,589
30-59 Days Past Due | Real estate | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,626
30-59 Days Past Due | Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4,137
30-59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	150
30-59 Days Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	30
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	16,947
60-89 Days Past Due | Commercial business loans | Business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	11,991
60-89 Days Past Due | Commercial business loans | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,927
60-89 Days Past Due | Mortgage finance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
60-89 Days Past Due | Construction | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
60-89 Days Past Due | Construction | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
60-89 Days Past Due | Real estate | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
60-89 Days Past Due | Real estate | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,992
60-89 Days Past Due | Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
60-89 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	37
60-89 Days Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0
Greater Than 90 Days and Accruing(1)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	10,100	[1]
Greater Than 90 Days and Accruing(1) | Commercial business loans | Business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	9,727	[1]
Greater Than 90 Days and Accruing(1) | Commercial business loans | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Mortgage finance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Construction | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Construction | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Real estate | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Real estate | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	373	[1]
Greater Than 90 Days and Accruing(1) | Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	[1]
Greater Than 90 Days and Accruing(1) | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 0	[1]
[1]	Loans past due 90 days and still accruing includes premium finance loans of $6.1 million. These loans are generally secured by obligations of insurance carriers to refund premiums on canceled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.

LOANS AND ALLOWANCE FOR LOAN 42

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 7) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Financing Receivable, Modifications [Line Items]
Loans considered restructured that are not already on non-accrual	$ 249
Non-accrual loans that met the criteria for restructured unfunded commitments	$ 37,900		$ 24,900
Number of restructured loans	2	2
Pre-restructuring outstanding recorded investment	$ 14,235	$ 1,369
Post-restructuring outstanding recorded investment	$ 14,235	$ 1,369
Energy loans
Financing Receivable, Modifications [Line Items]
Number of restructured loans	2
Pre-restructuring outstanding recorded investment	$ 14,235
Post-restructuring outstanding recorded investment	$ 14,235
Commercial business loans
Financing Receivable, Modifications [Line Items]
Number of restructured loans	0	2
Pre-restructuring outstanding recorded investment	$ 0	$ 1,369
Post-restructuring outstanding recorded investment	$ 0	$ 1,369

LOANS AND ALLOWANCE FOR LOAN 43

LOANS AND ALLOWANCE FOR LOAN LOSSES - TDR Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	$ 14,235	$ 1,369
Extended maturity
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	0	0
Adjusted payment schedule
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	12,916
Combination of maturity extension and payment schedule adjustment
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	$ 1,319	$ 1,369

OREO AND VALUATION ALLOWANCE 44

OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance	$ 278	[1],[2]	$ 568
Additions	17,398		1,092
Sales	(91)		(1,055)
Valuation allowance for OREO	0		0
Direct write-downs	0		0
Ending balance	$ 17,585	[1],[2]	$ 605
[1]	Fair value of loans held for investment and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.
[2]	OREO is transferred from loans to OREO at fair value less selling costs.

CERTAIN TRANSFERS OF FINANCIA45

CERTAIN TRANSFERS OF FINANCIAL ASSETS (Details)	3 Months Ended
	Mar. 31, 2016USD ($)loan	Dec. 31, 2015USD ($)loan
Transfers and Servicing [Abstract]
Number of loans in servicing portfolio | loan	1,470	168
Outstanding principal balance of loans in servicing portfolio Financial Assets, Principal Amount Outstanding	$ 380,200,000	$ 39,000,000
Escrow fund deposits related to servicing assets	2,900,000	$ 240,000
Mortgage loans sold during the period	342,600,000
Estimated exposure related to servicing assets	$ 178,000

CERTAIN TRANSFERS OF FINANCIA46

CERTAIN TRANSFERS OF FINANCIAL ASSETS (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Unpaid Principal Balance	$ 90,006	$ 82,853
Fair Value	94,702	86,075
Fair Value Over/(Under) Unpaid Principal Balance	$ 4,696	$ 3,222

CERTAIN TRANSFERS OF FINANCIA47

CERTAIN TRANSFERS OF FINANCIAL ASSETS (Details 2) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Servicing asset:
Balance, beginning of year	$ 423
Capitalized servicing rights	3,903
Amortization	(40)
Balance, end of period	4,286
Valuation allowance:
Balance, beginning of year	0
Increase in valuation allowance	33
Balance, end of period	33
Fair value	$ 4,253

CERTAIN TRANSFERS OF FINANCIA48

CERTAIN TRANSFERS OF FINANCIAL ASSETS (Details 3)	3 Months Ended
	Mar. 31, 2016
Transfers and Servicing [Abstract]
Average discount rates (percent)	9.85%
Expected prepayment speeds (percent)	10.67%
Weighted-average life, in years	6 years 6 months

FINANCIAL INSTRUMENTS WITH OF49

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments whose contract amounts represented credit risk	$ 5,555,634	$ 5,542,363
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments whose contract amounts represented credit risk	$ 191,141	$ 182,219

REGULATORY MATTERS (Details)

REGULATORY MATTERS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Regulatory Capital Requirements [Abstract]
CET1	7.47%	7.47%
Tier 1 capital	8.78%	8.81%
Total capital	11.07%	11.05%
Leverage	9.10%	8.92%
Mortgage finance	$ 4,981,304	$ 4,966,276
Mortgage finance, average balance	$ 3,700,000

STOCK-BASED COMPENSATION (Detai

STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	May. 19, 2015
Restricted stock units, additional disclosures
Compensation expense	$ 459	$ 2,357
Unrecognized compensation expense related to unvested awards	$ 12,331
Weighted average period over which expense is expected to be recognized, in years	3 years 1 month 4 days
SARs
Restricted stock units, additional disclosures
Compensation expense	$ 82	104
RSUs
Restricted stock units, additional disclosures
Compensation expense	1,050	887
Cash-based performance units
Restricted stock units, additional disclosures
Compensation expense	$ (673)	$ 1,366
2015 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock shares that can be issued for compensation under the Plan			2,550,000

FAIR VALUE DISCLOSURES (Assets

FAIR VALUE DISCLOSURES (Assets and Liabilities) (Details) - USD ($) $ in Thousands		Mar. 31, 2016		Dec. 31, 2015		Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale		$ 28,461		$ 29,992
Loans held for sale		94,702		86,075
OREO		17,585	[1],[2]	278	[1],[2]	$ 605	$ 568
Derivative assets		54,926		35,292
Derivative liabilities		(55,404)		(35,420)
Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[3]	20,162		21,901
Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[4]	566		831
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[5],[6]	7,733		7,260
Fair value measurements, recurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	[7]	0		0
Derivative assets	[7]	0		0
Derivative liabilities	[7]	0		0
Fair value measurements, recurring basis | Level 1 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8]	0		0
Fair value measurements, recurring basis | Level 1 | Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8]	0		0
Fair value measurements, recurring basis | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8],[9]	0		0
Fair value measurements, recurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	[7]	94,702		86,075
Derivative assets	[7]	54,926		35,292
Derivative liabilities	[7]	(55,404)		(35,420)
Fair value measurements, recurring basis | Level 2 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8]	20,162		21,901
Fair value measurements, recurring basis | Level 2 | Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8]	566		831
Fair value measurements, recurring basis | Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8],[9]	7,733		7,260
Fair value measurements, recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	[7]	0		0
Derivative assets	[7]	0		0
Derivative liabilities	[7]	0		0
Fair value measurements, recurring basis | Level 3 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8]	0		0
Fair value measurements, recurring basis | Level 3 | Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8]	0		0
Fair value measurements, recurring basis | Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	[8],[9]	0		0
Fair value measurements, nonrecurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[1],[10]	0		0
OREO	[1],[2]	0		0
Fair value measurements, nonrecurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[1],[10]	0		0
OREO	[1],[2]	0		0
Fair value measurements, nonrecurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[1],[10]	96,494		41,420
OREO	[1],[2]	$ 17,585		$ 278
[1]	Fair value of loans held for investment and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.
[2]	OREO is transferred from loans to OREO at fair value less selling costs.
[3]	Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.
[4]	Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.
[5]	Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan.
[6]	These equity securities do not have a stated maturity.
[7]	Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.
[8]	Securities are measured at fair value on a recurring basis, generally monthly.
[9]	Equity securities consist of Community Reinvestment Act funds and investments related to our non-qualified deferred compensation plan.
[10]	Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

FAIR VALUE DISCLOSURES (Financi

FAIR VALUE DISCLOSURES (Financial Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2016		Dec. 31, 2015		Mar. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
OREO		$ 17,585	[1],[2]	$ 278	[1],[2]	$ 605	$ 568
Securities, available-for-sale		28,461		29,992
Loans held for sale		94,702		86,075
Derivative assets		54,926		35,292
Derivative liabilities		55,404		35,420
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		2,733,695		1,790,870
Securities, available-for-sale		28,461		29,992
Loans held for sale		94,702		86,075
Loans held for investment, net		16,878,643		16,570,839
Derivative assets		54,926		35,292
Deposits		16,298,847		15,084,619
Federal funds purchased		82,713		74,164
Customer repurchase agreements		18,146		68,887
Other borrowings		1,604,000		1,500,000
Subordinated notes		280,773		280,682
Trust preferred subordinated debentures		113,406		113,406
Derivative liabilities		55,404		35,420
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		2,733,695		1,790,870
Securities, available-for-sale		28,461		29,992
Loans held for sale		94,702		86,075
Loans held for investment, net		16,894,928		16,576,297
Derivative assets		54,926		35,292
Deposits		16,299,367		15,085,080
Federal funds purchased		82,713		74,164
Customer repurchase agreements		18,146		68,887
Other borrowings		1,604,000		1,500,000
Subordinated notes		290,561		285,773
Trust preferred subordinated debentures		113,406		113,406
Derivative liabilities		55,404		35,420
Level 3 | Fair value measurements, nonrecurring basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of impaired loans		127,800		49,700
Allowance allocation of impaired loans		31,300		8,300
OREO	[1],[2]	17,585		278
Loans held for investment, net	[1],[3]	$ 96,494		$ 41,420
[1]	Fair value of loans held for investment and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.
[2]	OREO is transferred from loans to OREO at fair value less selling costs.
[3]	Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

DERIVATIVE FINANCIAL INSTRUME54

DERIVATIVE FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Asset Derivative	$ 54,926	$ 35,292
Liability Derivative	55,404	35,420
Offsetting derivative liability	0	0
Offsetting derivative asset	0	0
Derivative asset, net	54,926	35,292
Derivative liability, net	$ 55,404	35,420
Description of credit risk exposure on interest rate swaps and caps	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 relating to interest rate swaps and caps	$ 54,900	35,300
Cash collateral pledge for derivatives	$ 55,700	$ 37,100
Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease | Weighted-average interest rate received
Derivatives, Fair Value [Line Items]
Weighted-average interest rate received and paid	2.96%	2.96%
Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease | Weighted-average interest rate paid
Derivatives, Fair Value [Line Items]
Weighted-average interest rate received and paid	4.72%	4.72%
Commercial loan/lease interest rate caps
Derivatives, Fair Value [Line Items]
Weighted-average interest rate received and paid	2.34%	2.34%
Financial institution counterparties: | Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	$ 980,118	$ 976,389
Asset Derivative	0	0
Liability Derivative	53,948	33,851
Financial institution counterparties: | Commercial loan/lease interest rate caps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	193,547	194,304
Asset Derivative	589	1,441
Liability Derivative	0	0
Customer counterparties: | Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	980,118	976,389
Asset Derivative	53,948	33,851
Liability Derivative	0	0
Customer counterparties: | Commercial loan/lease interest rate caps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	193,547	194,304
Asset Derivative	0	0
Liability Derivative	589	1,441
Loan purchase commitments | Interest rate derivative | Economic hedging interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	75,075	62,835
Asset Derivative	389	0
Liability Derivative	0	109
Forward sale commitments | Interest rate derivative | Economic hedging interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	159,111	143,200
Asset Derivative	0	0
Liability Derivative	$ 867	$ 19