Bbva Usa Bancshares 10-Q12 Aug 152015 Q2 Quarterly reportFinancial data

Company Profile

DEI Document

DEI Document - shares	6 Months Ended
DEI Document - shares	Jun. 30, 2015	Jul. 31, 2015
Entity [Abstract]
Entity Registrant Name	BBVA Compass Bancshares, Inc.
Entity Central Index Key	1,409,775
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		222,950,751

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets:
Cash and due from banks	$ 3,353,177	$ 2,764,345
Federal funds sold, securities purchased under agreements to resell and interest bearing deposits	512,244	624,060
Cash and cash equivalents	3,865,421	3,388,405
Trading account assets	4,879,125	2,834,397
Investment securities available for sale	10,392,484	10,237,275
Investment securities held to maturity (fair value of $1,281,338 and $1,275,963 at June 30, 2015 and December 31, 2014, respectively)	1,375,075	1,348,354
Loans held for sale (includes $195,616 and $154,816 measured at fair value at June 30, 2015 and December 31, 2014, respectively)	195,616	154,816
Loans	60,007,226	57,371,784
Allowance for loan losses	(721,471)	(685,041)
Net loans	59,285,755	56,686,743
Premises and equipment, net	1,315,020	1,351,479
Bank owned life insurance	698,773	694,335
Goodwill	5,060,161	5,046,847
Other intangible assets	50,208	70,784
Other real estate owned	20,188	20,600
Other assets	1,332,923	1,318,392
Total assets	88,470,749	83,152,427
Deposits:
Noninterest bearing	19,048,273	17,169,412
Interest bearing	43,451,096	44,020,304
Total deposits	62,499,369	61,189,716
FHLB and other borrowings	6,778,066	4,809,843
Federal funds purchased and securities sold under agreements to repurchase	623,400	1,129,503
Other short-term borrowings	4,982,154	2,545,724
Accrued expenses and other liabilities	1,360,698	1,474,067
Total liabilities	76,243,687	71,148,853
Shareholder’s Equity:
Preferred stock, $.0.01 par value: authorized - 30,000,000 shares, shares issued and outstanding - none	0	0
Common stock - $0.01 par value; Authorized - 300,000,000 shares, Issued - 222,950,721 shares at both June 30, 2015 and December 31, 2014	2,230	2,230
Surplus	15,245,414	15,285,991
Accumulated deficit	(2,985,011)	(3,262,181)
Accumulated other comprehensive loss	(64,672)	(51,357)
Total BBVA Compass Bancshares, Inc. shareholder’s equity	12,197,961	11,974,683
Noncontrolling interests	29,101	28,891
Total shareholder’s equity	12,227,062	12,003,574
Total liabilities and shareholder’s equity	$ 88,470,749	$ 83,152,427

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) Parenthetical - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Investment Securities - Fair Value	$ 1,281,338	$ 1,275,963
Loans Held for Sale - Fair Value	$ 195,616	$ 154,816
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0
Preferred stock, number of shares authorized	30,000,000	0
Preferred stock, number of shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, number of shares authorized	300,000,000	300,000,000
Common stock, number of shares issued	222,950,751	222,950,751

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest income:
Interest and fees on loans	$ 531,394	$ 520,516	$ 1,075,236	$ 1,029,022
Interest on investment securities available for sale	48,204	48,253	96,412	97,343
Interest on investment securities held to maturity	6,924	7,003	13,626	14,249
Interest on federal funds sold, securities purchased under agreements to resell and interest bearing deposits	1,362	42	2,358	89
Interest on trading account assets	13,832	578	23,446	1,094
Total interest income	601,716	576,392	1,211,078	1,141,797
Interest expense:
Interest on deposits	65,201	60,901	134,854	114,117
Interest on FHLB and other borrowings	27,540	16,184	46,646	32,548
Interest on federal funds purchased and securities sold under agreements to repurchase	1,702	437	3,028	937
Interest on other short-term borrowings	15,291	96	25,539	122
Total interest expense	109,734	77,618	210,067	147,724
Net interest income	491,982	498,774	1,001,011	994,073
Provision for loan losses	46,149	45,252	88,180	82,518
Net interest income after provision for loan losses	445,833	453,522	912,831	911,555
Noninterest income:
Service charges on deposit accounts	53,690	54,958	106,974	108,349
Card and merchant processing fees	28,711	28,473	54,894	52,777
Retail investment sales	26,373	28,844	51,519	55,408
Investment banking and advisory fees	36,799	22,279	67,133	44,475
Asset management fees	8,435	10,535	16,531	21,293
Corporate and correspondent investment sales	7,984	7,972	14,243	16,628
Mortgage banking income	12,556	6,150	20,715	10,426
Bank owned life insurance	4,394	4,237	9,182	8,204
Investment securities gains, net	27,399	21,464	60,231	37,898
Loss on prepayment of FHLB and other borrowings, net	(3,569)	0	(6,118)	(458)
Other	55,797	50,533	112,535	99,773
Total noninterest income	258,569	235,445	507,839	454,773
Noninterest expense:
Salaries, benefits and commissions	268,709	263,301	527,971	525,870
Equipment	57,175	55,469	115,316	109,207
Professional services	51,119	49,790	97,678	96,189
Net occupancy	40,382	40,200	79,662	79,157
FDIC indemnification expense	12,419	30,370	41,208	61,988
Amortization of intangibles	9,889	13,631	20,576	26,165
Securities impairment:
Other-than-temporary impairment	1,013	34	1,385	415
Less: non-credit portion recognized in other comprehensive income	0	0	87	235
Total securities impairment	1,013	34	1,298	180
Other	78,930	92,467	158,646	165,373
Total noninterest expense	519,636	545,262	1,042,355	1,064,129
Net income before income tax expense	184,766	143,705	378,315	302,199
Income tax expense	48,116	36,130	99,898	79,697
Net income	136,650	107,575	278,417	222,502
Less: net income attributable to noncontrolling interests	590	504	1,247	957
Net income attributable to shareholder	$ 136,060	$ 107,071	$ 277,170	$ 221,545

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 136,650	$ 107,575	$ 278,417	$ 222,502
Other comprehensive income (loss), net of tax:
Unrealized holding gains (losses) arising during period from securities available for sale	(24,811)	25,915	11,777	52,155
Less: reclassification adjustment for net gains on sale of securities available for sale in net income	15,472	13,752	34,012	24,278
Net change in unrealized holding gains (losses) on securities available for sale	(40,283)	12,163	(22,235)	27,877
Change in unamortized net holding losses on investment securities held to maturity	1,994	1,727	3,768	4,785
Less: non-credit related impairment on investment securities held to maturity	0	0	49	151
Change in unamortized non-credit related impairment on investment securities held to maturity	258	237	414	483
Net change in unamortized holding losses on securities held to maturity	2,252	1,964	4,133	5,117
Unrealized holding gains (losses) arising during period from cash flow hedge instruments	1,013	(875)	3,072	(1,682)
Change in defined benefit plans	0	0	1,715	(1,671)
Other comprehensive income (loss), net of tax	(37,018)	13,252	(13,315)	29,641
Comprehensive income	99,632	120,827	265,102	252,143
Less: comprehensive income attributable to noncontrolling interests	590	504	1,247	957
Comprehensive income attributable to shareholder	$ 99,042	$ 120,323	$ 263,855	$ 251,186

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Shareholder's Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Surplus	Accumulated Deficit	Accumulated Other Comprehensive Loss	Non-controlling Interests
Balance, beginning of period at Dec. 31, 2013	$ 11,487,759	$ 2,207	$ 15,273,218	$ (3,728,737)	$ (87,936)	$ 29,007
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	222,502			221,545		957
Other comprehensive income (loss), net of tax	29,641				29,641
Issuance of common stock	117,000	23	116,977
Dividends	(1,036)					(1,036)
Vesting of restricted stock	(4,702)		(4,702)
Restricted stock retained to cover taxes	(2,507)		(2,507)
Amortization of stock-based deferred compensation	881		881
Balance, end of period at Jun. 30, 2014	11,849,538	2,230	15,383,867	(3,507,192)	(58,295)	28,928
Balance, beginning of period at Dec. 31, 2014	12,003,574	2,230	15,285,991	(3,262,181)	(51,357)	28,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	278,417			277,170		1,247
Other comprehensive income (loss), net of tax	(13,315)				(13,315)
Dividends	(36,037)		(35,000)			(1,037)
Vesting of restricted stock	(3,720)		(3,720)
Restricted stock retained to cover taxes	(2,984)		(2,984)
Amortization of stock-based deferred compensation	1,127		1,127
Balance, end of period at Jun. 30, 2015	$ 12,227,062	$ 2,230	$ 15,245,414	$ (2,985,011)	$ (64,672)	$ 29,101

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating Activities:
Net income	$ 278,417	$ 222,502
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	138,409	133,334
Securities impairment	1,298	180
Amortization of intangibles	20,576	26,165
Accretion of discount, loan fees and purchase market adjustments, net	(74,103)	(94,032)
Net change in FDIC indemnification asset/liability	41,208	61,988
Provision for loan losses	88,180	82,518
Amortization of stock based compensation	1,127	881
Net change in trading account assets	(25,970)	(36,959)
Net change in trading account liabilities	(11,562)	3,569
Net change in loans held for sale	(40,800)	(64,770)
Deferred tax expense	11,723	8,936
Investment securities gains, net	(60,231)	(37,898)
Loss on prepayment of FHLB and other borrowings, net	6,118	458
Loss on sale of premises and equipment	765	863
Loss on sale of student loans	2	75
Net loss on sale of other real estate and other assets	79	3,613
Loss on disposition	0	981
Increase in other assets	(17,597)	(47,341)
Decrease in other liabilities	(164,512)	(2,342)
Net cash provided by operating activities	193,127	262,721
Investing Activities:
Proceeds from sales of investment securities available for sale	2,290,810	782,629
Proceeds from prepayments, maturities and calls of investment securities available for sale	791,335	658,008
Purchases of investment securities available for sale	(3,256,380)	(2,062,781)
Proceeds from prepayments, maturities and calls of investment securities held to maturity	57,803	79,146
Purchases of investment securities held to maturity	(78,076)	0
Proceeds from sales of trading securities	1,813,558	0
Purchases of trading securities	(3,832,316)	0
Net change in loan portfolio	(2,632,178)	(3,499,733)
Purchase of premises and equipment	(58,500)	(36,455)
Proceeds from sale of premises and equipment	2,081	11,181
Net cash paid in acquisition	(13,314)	(97,566)
Proceeds from sales of loans	10,480	96,199
Reimbursements from (payments to) FDIC for covered assets	905	(6,611)
Proceeds from sales of other real estate owned	9,562	10,116
Net cash used in investing activities	(4,894,230)	(4,065,867)
Financing Activities:
Net increase in demand deposits, NOW accounts and savings accounts	1,150,584	2,602,535
Net increase in time deposits	152,273	1,077,027
Net (decrease) increase in federal funds purchased and securities sold under agreements to repurchase	(506,103)	11,693
Net increase in other short-term borrowings	2,436,430	10,114
Proceeds from FHLB and other borrowings	3,600,000	0
Repayment of FHLB and other borrowings	(1,612,324)	(341,236)
Vesting of restricted stock	(3,720)	(4,702)
Restricted stock grants retained to cover taxes	(2,984)	(2,507)
Issuance of common stock	0	117,000
Common dividends paid	(35,000)	0
Preferred dividends paid	(1,037)	(1,036)
Net cash provided by financing activities	5,178,119	3,468,888
Net increase (decrease) in cash and cash equivalents	477,016	(334,258)
Cash and cash equivalents at beginning of year	3,388,405	3,598,460
Cash and cash equivalents at end of period	$ 3,865,421	$ 3,264,202

Basis of Presentation

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation General The accounting and reporting policies of the Company and the methods of applying those policies that materially affect the consolidated financial statements conform with U.S. GAAP and with general financial services industry practices. The accompanying interim financial statements have been prepared in accordance with the rules and regulations of the SEC and, therefore, do not include all information and notes to the consolidated financial statements necessary for a complete presentation of financial position, results of operations, comprehensive income and cash flows in conformity with U.S. GAAP. In the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the consolidated financial statements have been included. Operating results for the three and six months ended June 30, 2015 , are not necessarily indicative of the results that may be expected for the year ended December 31, 2015 . These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 . The Company has evaluated subsequent events for potential recognition and disclosure through the filing date of this Quarterly Report on Form 10-Q to determine if either recognition or disclosure of significant events or transactions is required. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period, the most significant of which relate to the allowance for loan losses, goodwill impairment, fair value measurements and income taxes. Actual results could differ from those estimates. Recently Issued Accounting Standards Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure In January 2014 , the FASB released ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure . The amendments in this ASU clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 . The Company elected to adopt the amendments in this ASU using the prospective transition method. The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. See Note 3 , Loans and Allowance for Loan Losses . Revenue from Contracts with Customers In May 2014 , the FASB released ASU 2014-09, Revenue from Contracts with Customers . The core principle of this codified guidance requires an entity to recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides five steps to be analyzed to accomplish the core principle. The amendments in this ASU were originally effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016 . Subsequently, the FASB issued a one -year deferral for implementation, which results in the new guidance being effective for annual and interim reporting periods beginning after December 15, 2017. The FASB, however, permitted adoption of the new guidance on the original effective date. The Company is currently assessing the impact that the adoption of this standard will have on the financial condition and results of operations of the Company. Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures In June 2014 , the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures . The amendments in this ASU change the accounting for repurchase-to-maturity transactions to secured borrowing accounting. In addition, for repurchase financing arrangements, the amendments require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The amendments in this ASU also require disclosures on transfers accounted for as sales in transactions that are economically similar to repurchase agreements, and provide increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The accounting changes in this ASU and disclosures for certain transactions accounted for as a sale are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 . The disclosures for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014 and for interim periods beginning after March 15, 2015 . The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. See Note 6 , Securities Financing Activities . Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure In August 2014 , the FASB issued ASU 2014-14, Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure . The amendments in this ASU address the classification and measurement of foreclosed loans which were part of a government-sponsored loan guarantee program. If certain criteria are met, the loan should be derecognized and a separate other receivable should be recorded upon foreclosure at the amount of the loan balance expected to be recovered from the guarantor. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 . The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. Consolidation In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis. The amendments in this ASU modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminate the presumption that a general partner should consolidate a limited partnership, affect the consolidation analysis of reporting entities that are involved with variable interest entities and provide a scope exception from consolidation guidance for reporting entities with interest in certain investment funds. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Simplifying the Presentation of Debt Issuance Costs In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs. To simplify presentation of debt issuance costs, the amendments in this ASU require 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. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Customer's Accounting for Fees Paid in a Cloud Computing Arrangement In April 2015, the FASB issued ASU 2015-05, Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in this ASU provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company.

Investment Securities Available

Investment Securities Available for Sale and Investment Securities Held to Maturity	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities Available for Sale and Investment Securities Held to Maturity	Investment Securities Available for Sale and Investment Securities Held to Maturity The following table presents the adjusted cost and approximate fair value of investment securities available for sale and investment securities held to maturity. June 30, 2015 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 2,683,135 $ 4,308 $ 21,335 $ 2,666,108 Mortgage-backed securities 4,285,489 38,065 29,721 4,293,833 Collateralized mortgage obligations 2,470,388 17,390 5,118 2,482,660 States and political subdivisions 368,388 4,655 2,262 370,781 Other 24,078 196 33 24,241 Equity securities 554,816 45 — 554,861 Total $ 10,386,294 $ 64,659 $ 58,469 $ 10,392,484 Investment securities held to maturity: Collateralized mortgage obligations $ 114,433 $ 6,421 $ 4,918 $ 115,936 Asset-backed securities 31,378 3,111 2,143 32,346 States and political subdivisions 1,163,159 513 97,754 1,065,918 Other 66,105 3,226 2,193 67,138 Total $ 1,375,075 $ 13,271 $ 107,008 $ 1,281,338 December 31, 2014 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 2,312,572 $ 10,360 $ 9,390 $ 2,313,542 Mortgage-backed securities 4,399,706 64,371 40,242 4,423,835 Collateralized mortgage obligations 2,475,115 19,385 5,921 2,488,579 States and political subdivisions 460,569 8,008 1,262 467,315 Other 44,225 238 22 44,441 Equity securities 499,522 41 — 499,563 Total $ 10,191,709 $ 102,403 $ 56,837 $ 10,237,275 Investment securities held to maturity: Collateralized mortgage obligations $ 124,051 $ 5,878 $ 5,452 $ 124,477 Asset-backed securities 39,187 3,568 2,011 40,744 States and political subdivisions 1,112,415 2,143 79,246 1,035,312 Other 72,701 4,920 2,191 75,430 Total $ 1,348,354 $ 16,509 $ 88,900 $ 1,275,963 In the above table, equity securities include $555 million and $500 million at June 30, 2015 and December 31, 2014 , respectively, of FHLB and Federal Reserve stock carried at par. The investments held within the states and political subdivision caption of investment securities held to maturity relate to private placement transactions underwritten as loans by the Company but that meet the definition of a security within ASC Topic 320, Investments – Debt and Equity Securities . The following table discloses the fair value and the gross unrealized losses of the Company’s available for sale securities and held to maturity securities that were in a loss position at June 30, 2015 and December 31, 2014 . This information is aggregated by investment category and the length of time the individual securities have been in an unrealized loss position. June 30, 2015 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 1,780,766 $ 18,177 $ 190,089 $ 3,158 $ 1,970,855 $ 21,335 Mortgage-backed securities 1,188,411 4,667 1,600,190 25,054 2,788,601 29,721 Collateralized mortgage obligations 830,323 3,872 64,471 1,246 894,794 5,118 States and political subdivisions 171,308 2,262 — — 171,308 2,262 Other — — 1,089 33 1,089 33 Total $ 3,970,808 $ 28,978 $ 1,855,839 $ 29,491 $ 5,826,647 $ 58,469 Investment securities held to maturity: Collateralized mortgage obligations $ 17,802 $ 277 $ 44,273 $ 4,641 $ 62,075 $ 4,918 Asset-backed securities 1,372 3 19,264 2,140 20,636 2,143 States and political subdivisions 121,034 8,424 784,042 89,330 905,076 97,754 Other 3,925 2,193 — — 3,925 2,193 Total $ 144,133 $ 10,897 $ 847,579 $ 96,111 $ 991,712 $ 107,008 December 31, 2014 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 620,794 $ 8,220 $ 37,220 $ 1,170 $ 658,014 $ 9,390 Mortgage-backed securities 308,734 862 1,915,494 39,380 2,224,228 40,242 Collateralized mortgage obligations 714,173 3,829 146,806 2,092 860,979 5,921 States and political subdivisions — — 135,825 1,262 135,825 1,262 Other — — 1,099 22 1,099 22 Total $ 1,643,701 $ 12,911 $ 2,236,444 $ 43,926 $ 3,880,145 $ 56,837 Investment securities held to maturity: Collateralized mortgage obligations $ 34,400 $ 1,099 $ 27,389 $ 4,353 $ 61,789 $ 5,452 Asset-backed securities — — 23,374 2,011 23,374 2,011 States and political subdivisions 21,688 768 817,570 78,478 839,258 79,246 Other 4,061 2,191 — — 4,061 2,191 Total $ 60,149 $ 4,058 $ 868,333 $ 84,842 $ 928,482 $ 88,900 As indicated in the previous tables, at June 30, 2015 , the Company held certain investment securities in unrealized loss positions. The Company does not have the intent to sell these securities and believes it is not more likely than not that it will be required to sell these securities before their anticipated recovery. The Company regularly evaluates each available for sale and held to maturity security in a loss position for OTTI. In its evaluation, the Company considers such factors as the length of time and the extent to which the fair value has been below cost, the financial condition of the issuer, the Company’s intent to hold the security to an expected recovery in market value and whether it is more likely than not that the Company will have to sell the security before its fair value recovers. Activity related to the credit loss component of the OTTI is recognized in earnings. The portion of OTTI related to all other factors is recognized in other comprehensive income. Management does not believe that any individual unrealized loss in the Company’s investment securities available for sale or held to maturity portfolios, presented in the preceding tables, represents an OTTI at either June 30, 2015 or December 31, 2014 , other than those noted below. The following table discloses activity related to credit losses for debt securities where a portion of the OTTI was recognized in other comprehensive income. Three Months Ended Six Months Ended 2015 2014 2015 2014 (In Thousands) Balance at beginning of period $ 21,408 $ 21,089 $ 21,123 $ 20,943 Reductions for securities paid off during the period (realized) — — — — Additions for the credit component on debt securities in which OTTI was not previously recognized 1,013 — 1,013 — Additions for the credit component on debt securities in which OTTI was previously recognized — 34 285 180 Balance at end of period $ 22,421 $ 21,123 $ 22,421 $ 21,123 For the three months ended June 30, 2015 and 2014 , there was $1.0 million and $34 thousand , respectively of OTTI recognized on held to maturity securities. For the six months ended June 30, 2015 and 2014 , there was $1.3 million and $180 thousand , respectively of OTTI recognized on held to maturity securities. The investment securities primarily impacted by credit impairment are held to maturity non-agency collateralized mortgage obligations, asset-backed securities and states and political subdivisions. The maturities of the securities portfolios are presented in the following table. June 30, 2015 Amortized Cost Fair Value (In Thousands) Investment securities available for sale: Maturing within one year $ 16,274 $ 16,448 Maturing after one but within five years 204,577 204,016 Maturing after five but within ten years 1,532,790 1,528,771 Maturing after ten years 1,321,960 1,311,895 3,075,601 3,061,130 Mortgage-backed securities and collateralized mortgage obligations 6,755,877 6,776,493 Equity securities 554,816 554,861 Total $ 10,386,294 $ 10,392,484 Investment securities held to maturity: Maturing within one year $ 2,103 $ 2,108 Maturing after one but within five years 303,442 287,795 Maturing after five but within ten years 199,881 191,931 Maturing after ten years 755,216 683,568 1,260,642 1,165,402 Collateralized mortgage obligations 114,433 115,936 Total $ 1,375,075 $ 1,281,338 The gross realized gains and losses recognized on sales of investment securities available for sale are shown in the table below. Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 (In Thousands) Gross gains $ 27,399 $ 21,464 $ 60,231 $ 37,898 Gross losses — — — — Net realized gains $ 27,399 $ 21,464 $ 60,231 $ 37,898

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	6 Months Ended
Loans and Allowance for Loan Losses	Jun. 30, 2015
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses The following table presents the composition of the loan portfolio. June 30, 2015 December 31, 2014 (In Thousands) Commercial loans: Commercial, financial and agricultural $ 24,953,188 $ 23,828,537 Real estate – construction 2,436,831 2,154,652 Commercial real estate – mortgage 10,325,680 9,877,206 Total commercial loans 37,715,699 35,860,395 Consumer loans: Residential real estate – mortgage 14,203,543 13,922,656 Equity lines of credit 2,352,700 2,304,784 Equity loans 639,126 634,968 Credit card 592,369 630,456 Consumer direct 780,368 652,927 Consumer indirect 3,249,579 2,870,408 Total consumer loans 21,817,685 21,016,199 Covered loans 473,842 495,190 Total loans $ 60,007,226 $ 57,371,784 Purchased Impaired Loans Purchased Impaired Loans are recognized on the Company's Unaudited Condensed Consolidated Balance Sheets within loans, net of recorded discount. The following table presents the unpaid principal balance, discount, allowance for loan losses and carrying value of the Purchased Impaired Loans. June 30, 2015 December 31, 2014 (In Thousands) Unpaid principal balance $ 352,847 $ 378,913 Discount (8,197 ) (17,341 ) Allowance for loan losses (1,786 ) (2,066 ) Carrying value $ 342,864 $ 359,506 An analysis of the accretable yield related to the Purchased Impaired Loans follows. Six Months Ended June 30, 2015 2014 (In Thousands) Balance at beginning of period $ 68,785 $ 105,698 Transfer to (from) nonaccretable difference (10,071 ) 6,633 Accretion (14,850 ) (29,405 ) Other — — Balance at end of period $ 43,864 $ 82,926 The Company had allowance for loan losses of $1.8 million and $2.1 million related to Purchased Impaired Loans at June 30, 2015 and December 31, 2014 , respectively. During the three months ended June 30, 2015 and 2014 , the Company recognized $1.0 million and $2.5 million , respectively, of provision for loan losses attributable to credit deterioration subsequent to acquisition of these loans. During the six months ended June 30, 2015 and 2014 , the Company recognized $105 thousand and $4.6 million , respectively, of provision for loan losses attributable to credit deterioration subsequent to acquisition of these loans. Purchased Nonimpaired Loans At acquisition, Purchased Nonimpaired Loans were determined to have fair value discounts, some of which were related to credit. The portion of the fair value discount not related to credit is being accreted to interest income over the expected remaining life of the loans based on expected cash flows. For the three months ended June 30, 2015 and 2014 approximately $16.8 million and $35.4 million , respectively, of interest income was recognized on these loans. For the six months ended June 30, 2015 and 2014 approximately $53.4 million and $73.2 million , respectively, of interest income was recognized on these loans. The discount related to credit on the Purchased Nonimpaired Loans is reviewed for adequacy quarterly. If the expected losses exceed the credit discount, an allowance for loan losses is provided. If the expected losses are reduced, the related credit discount is accreted to interest income over the expected remaining life of the loans. The following table presents the unpaid principal balance, discount, allowance for loan losses, and carrying value of the Purchased Nonimpaired Loans. June 30, 2015 December 31, 2014 (In Thousands) Unpaid principal balance $ 264,142 $ 294,202 Discount (45,630 ) (88,962 ) Allowance for loan losses (291 ) (2,283 ) Carrying value $ 218,221 $ 202,957 FDIC Indemnification Asset (Liability) The Company has entered into loss sharing agreements with the FDIC that require the FDIC to reimburse the Bank for losses with respect to covered loans and covered OREO. In addition, the provisions of the loss sharing agreements may also require a payment by the Bank to the FDIC on October 15, 2019 if the acquired portfolio's credit improves beyond original expectations. Activity associated with the Company's estimate of the potential amount of this payment is included in the table below. The Company has chosen to net the amounts due from the FDIC and due to the FDIC into the FDIC indemnification asset (liability), which is recorded in accrued expenses and other liabilities in the Company's Unaudited Condensed Consolidated Balance Sheets. See Note 7 , Commitments, Contingencies and Guarantees , for additional information related to the loss sharing agreements. A summary of the activity in the FDIC indemnification asset (liability) is presented in the following table. Six Months Ended June 30, 2015 2014 (In Thousands) Balance at beginning of period $ (78,025 ) $ 24,315 Increase (decrease) due to credit loss provision (benefit) recorded on FDIC covered loans (1,054 ) 8,726 Amortization and accretion, net (38,411 ) (67,212 ) Payments to (reimbursements from) FDIC for covered assets (905 ) 6,611 Other (1,743 ) (3,502 ) Balance at end of period $ (120,138 ) $ (31,062 ) Other adjustments include those resulting from the change in loss estimates related to OREO as a result of changes in expected cash flows as well as adjustments resulting from amounts owed to the FDIC for unexpected recoveries of amounts previously charged off and loan expenses incurred and claimed. Allowance for Loan Losses and Credit Quality The following table, which excludes loans held for sale, presents a summary of the activity in the allowance for loan losses. The portion of the allowance that has not been identified by the Company as related to specific loan categories has been allocated to the individual loan categories on a pro rata basis for purposes of the table below: Commercial, Financial and Agricultural Commercial Real Estate (1) Residential Real Estate (2) Consumer (3) Covered Total Loans (In Thousands) Three months ended June 30, 2015 Allowance for loan losses: Beginning balance $ 323,397 $ 139,271 $ 144,947 $ 92,781 $ 1,468 $ 701,864 Provision (credit) for loan losses 29,351 (5,554 ) (6,442 ) 28,224 570 46,149 Loans charged off (4,926 ) (835 ) (8,191 ) (26,845 ) (153 ) (40,950 ) Loan recoveries 3,057 2,270 3,681 5,399 1 14,408 Net (charge-offs) recoveries (1,869 ) 1,435 (4,510 ) (21,446 ) (152 ) (26,542 ) Ending balance $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Three months ended June 30, 2014 Allowance for loan losses: Beginning balance $ 299,879 $ 153,130 $ 155,234 $ 91,357 $ 8,065 $ 707,665 Provision (credit) for loan losses 29,495 (5,057 ) 8,039 12,969 (194 ) 45,252 Loans charged off (15,517 ) (7,305 ) (13,861 ) (20,669 ) (791 ) (58,143 ) Loan recoveries 3,933 2,173 4,282 5,127 4,471 19,986 Net (charge-offs) recoveries (11,584 ) (5,132 ) (9,579 ) (15,542 ) 3,680 (38,157 ) Ending balance $ 317,790 $ 142,941 $ 153,694 $ 88,784 $ 11,551 $ 714,760 Six Months Ended June 30, 2015 Allowance for loan losses: Beginning balance $ 299,482 $ 138,233 $ 154,627 $ 89,891 $ 2,808 $ 685,041 Provision (credit) for loan losses 57,703 (5,739 ) (12,881 ) 48,994 103 88,180 Loans charged off (11,545 ) (1,470 ) (14,945 ) (51,390 ) (1,026 ) (80,376 ) Loan recoveries 5,239 4,128 7,194 12,064 1 28,626 Net (charge-offs) recoveries (6,306 ) 2,658 (7,751 ) (39,326 ) (1,025 ) (51,750 ) Ending balance $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Six Months Ended June 30, 2014 Allowance for loan losses: Beginning balance $ 292,327 $ 158,960 $ 155,575 $ 90,903 $ 2,954 $ 700,719 Provision (credit) for loan losses 36,996 (9,779 ) 20,712 29,798 4,791 82,518 Loans charged off (20,451 ) (9,951 ) (29,569 ) (42,373 ) (1,007 ) (103,351 ) Loan recoveries 8,918 3,711 6,976 10,456 4,813 34,874 Net (charge-offs) recoveries (11,533 ) (6,240 ) (22,593 ) (31,917 ) 3,806 (68,477 ) Ending balance $ 317,790 $ 142,941 $ 153,694 $ 88,784 $ 11,551 $ 714,760 (1) Includes commercial real estate – mortgage and real estate – construction loans. (2) Includes residential real estate – mortgage, equity lines of credit and equity loans. (3) Includes credit card, consumer direct and consumer indirect loans. The table below provides a summary of the allowance for loan losses and related loan balances by portfolio. Commercial, Financial and Agricultural Commercial Real Estate (1) Residential Real Estate (2) Consumer (3) Covered Total Loans (In Thousands) June 30, 2015 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 27,131 $ 5,026 $ 36,798 $ 1,613 $ — $ 70,568 Collectively evaluated for impairment 323,557 130,126 97,197 97,946 — 648,826 Purchased impaired — — — — 1,786 1,786 Purchased nonimpaired 191 — — — 100 291 Total allowance for loan losses $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Ending balance of loans: Individually evaluated for impairment $ 134,412 $ 86,108 $ 185,089 $ 1,830 $ — $ 407,439 Collectively evaluated for impairment 24,781,003 12,631,422 17,009,236 4,614,964 — 59,036,625 Purchased impaired — — — — 344,650 344,650 Purchased nonimpaired 37,773 44,981 1,044 5,522 129,192 218,512 Total loans $ 24,953,188 $ 12,762,511 $ 17,195,369 $ 4,622,316 $ 473,842 $ 60,007,226 December 31, 2014 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 11,158 $ 8,466 $ 42,277 $ 1,532 $ — $ 63,433 Collectively evaluated for impairment 287,105 129,767 112,350 88,037 — 617,259 Purchased impaired — — — — 2,066 2,066 Purchased nonimpaired 1,219 — — 322 742 2,283 Total allowance for loan losses $ 299,482 $ 138,233 $ 154,627 $ 89,891 $ 2,808 $ 685,041 Ending balance of loans: Individually evaluated for impairment $ 48,173 $ 105,608 $ 195,462 $ 1,827 $ — $ 351,070 Collectively evaluated for impairment 23,745,149 11,896,943 16,665,930 4,145,880 — 56,453,902 Purchased impaired — — — — 361,572 361,572 Purchased nonimpaired 35,215 29,307 1,016 6,084 133,618 205,240 Total loans $ 23,828,537 $ 12,031,858 $ 16,862,408 $ 4,153,791 $ 495,190 $ 57,371,784 (1) Includes commercial real estate – mortgage and real estate – construction loans. (2) Includes residential real estate – mortgage, equity lines of credit and equity loans. (3) Includes credit card, consumer direct and consumer indirect loans. The following table presents information on individually evaluated impaired loans, by loan class. June 30, 2015 Individually Evaluated Impaired Loans With No Recorded Allowance Individually Evaluated Impaired Loans With a Recorded Allowance Recorded Investment Unpaid Principal Balance Allowance Recorded Investment Unpaid Principal Balance Allowance (In Thousands) Commercial, financial and agricultural $ 7,751 $ 15,140 $ — $ 126,661 $ 131,299 $ 27,131 Real estate – construction 3,492 4,006 — 2,526 2,571 835 Commercial real estate – mortgage 22,249 23,330 — 57,841 62,294 4,191 Residential real estate – mortgage 6,772 6,772 — 102,577 102,577 6,523 Equity lines of credit — — — 26,659 27,071 23,103 Equity loans — — — 49,081 49,593 7,172 Credit card — — — — — — Consumer direct — — — 196 196 196 Consumer indirect — — — 1,634 1,634 1,417 Total loans $ 40,264 $ 49,248 $ — $ 367,175 $ 377,235 $ 70,568 December 31, 2014 Individually Evaluated Impaired Loans With No Recorded Allowance Individually Evaluated Impaired Loans With a Recorded Allowance Recorded Investment Unpaid Principal Balance Allowance Recorded Investment Unpaid Principal Balance Allowance (In Thousands) Commercial, financial and agricultural $ — $ — $ — $ 48,173 $ 61,552 $ 11,158 Real estate – construction 3,492 4,006 — 2,686 2,731 872 Commercial real estate – mortgage 22,822 23,781 — 76,608 82,005 7,594 Residential real estate – mortgage 8,795 8,795 — 107,223 107,306 9,236 Equity lines of credit — — — 25,743 26,124 23,394 Equity loans — — — 53,701 54,038 9,647 Credit card — — — — — — Consumer direct — — — 337 337 42 Consumer indirect — — — 1,490 1,490 1,490 Total loans $ 35,109 $ 36,582 $ — $ 315,961 $ 335,583 $ 63,433 The following table presents information on individually evaluated impaired loans, by loan class. Three Months Ended June 30, 2015 Three Months Ended June 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 95,797 $ 366 $ 88,271 $ 543 Real estate – construction 6,036 37 9,088 56 Commercial real estate – mortgage 82,055 537 117,404 835 Residential real estate – mortgage 110,514 694 112,862 725 Equity lines of credit 26,830 276 23,511 255 Equity loans 50,023 401 55,399 429 Credit card — — — — Consumer direct 981 2 140 1 Consumer indirect 1,642 — 1,309 1 Total loans $ 373,878 $ 2,313 $ 407,984 $ 2,845 Six Months Ended June 30, 2015 Six Months Ended June 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 80,339 $ 705 $ 107,546 $ 788 Real estate – construction 6,076 76 9,604 119 Commercial real estate – mortgage 85,117 1,117 129,376 1,777 Residential real estate – mortgage 112,220 1,389 113,913 1,444 Equity lines of credit 26,744 559 23,457 505 Equity loans 51,229 805 55,213 854 Credit card — — — — Consumer direct 831 8 149 2 Consumer indirect 1,593 — 1,287 2 Total loans $ 364,149 $ 4,659 $ 440,545 $ 5,491 The tables above do not include Purchased Impaired Loans, Purchased Nonimpaired Loans or loans held for sale. At June 30, 2015 , there were $1.9 million and $4.7 million of recorded investment and unpaid principal balance, respectively, on Purchased Impaired Loans with credit deterioration subsequent to acquisition that were individually evaluated for impairment. There was no allowance for loan losses recorded on these loans. At December 31, 2014 , there were $1.3 million and $4.7 million of recorded investment and unpaid principal balance, respectively, on Purchased Impaired Loans with credit deterioration subsequent to acquisition that were individually evaluated for impairment. There was no allowance for loan losses recorded on these loans. Purchased Nonimpaired Loans are not included in the tables above as they are evaluated collectively on a pool basis and not on an individual basis. Detailed information on the Company's allowance for loan losses methodology and the Company's impaired loan policy are included in the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2014 . The Company monitors the credit quality of its commercial portfolio using an internal dual risk rating, which considers both the obligor and the facility. The obligor risk ratings are defined by ranges of default probabilities of the borrowers (AAA through D) and the facility risk ratings are defined by ranges of the loss given default. The combination of those two approaches results in the assessment of the likelihood of loss and it is mapped to the regulatory classifications. The Company assigns internal risk ratings at loan origination and at regular intervals subsequent to origination. Loan review intervals are dependent on the size and risk grade of the loan, and are generally conducted at least annually. Additional reviews are conducted when information affecting the loan’s risk grade becomes available. The general characteristics of the risk grades are as follows: • The Company’s internally assigned letter grades “AAA” through “B-” correspond to the regulatory classification “Pass.” These loans do not have any identified potential or well-defined weaknesses and have a high likelihood of orderly repayment. Exceptions exist when either the facility is fully secured by a CD and held at the Company or the facility is secured by properly margined and controlled marketable securities. • Internally assigned letter grades “CCC+” through “CCC” correspond to the regulatory classification “Special Mention.” Loans within this classification have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the institution’s credit position at some future date. Special mention loans are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification. • Internally assigned letter grades “CCC-” through “D1” correspond to the regulatory classification “Substandard.” A loan classified as substandard is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the loan. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. • The internally assigned letter grade “D2” corresponds to the regulatory classification “Doubtful.” Loans classified as doubtful have all the weaknesses inherent in a loan classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable or improbable. The Company considers payment history as the best indicator of credit quality for the consumer portfolio. Nonperforming loans in the tables below include loans classified as nonaccrual, loans 90 days or more past due and loans modified in a TDR 90 days or more past due. The following tables, which exclude loans held for sale and covered loans, illustrate the credit quality indicators associated with the Company’s loans, by loan class. Commercial June 30, 2015 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Noncovered loans: Pass $ 24,328,227 $ 2,406,917 $ 9,962,971 Special Mention 339,112 17,077 231,340 Substandard 227,651 12,816 119,394 Doubtful 58,198 21 11,975 $ 24,953,188 $ 2,436,831 $ 10,325,680 December 31, 2014 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Noncovered loans: Pass $ 23,380,541 $ 2,098,994 $ 9,514,917 Special Mention 280,934 42,176 210,337 Substandard 128,251 13,458 129,435 Doubtful 38,811 24 22,517 $ 23,828,537 $ 2,154,652 $ 9,877,206 Consumer June 30, 2015 Residential Real Estate – Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 14,094,899 $ 2,316,428 $ 621,470 $ 584,697 $ 777,339 $ 3,241,916 Nonperforming 108,644 36,272 17,656 7,672 3,029 7,663 $ 14,203,543 $ 2,352,700 $ 639,126 $ 592,369 $ 780,368 $ 3,249,579 December 31, 2014 Residential Real Estate -Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 13,810,857 $ 2,269,231 $ 614,064 $ 621,015 $ 649,832 $ 2,865,013 Nonperforming 111,799 35,553 20,904 9,441 3,095 5,395 $ 13,922,656 $ 2,304,784 $ 634,968 $ 630,456 $ 652,927 $ 2,870,408 The following tables present an aging analysis of the Company’s past due loans, excluding loans classified as held for sale. June 30, 2015 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due and Impaired Not Past Due or Impaired Total (In Thousands) Commercial, financial and agricultural $ 18,524 $ 7,037 $ 3,149 $ 147,051 $ 9,693 $ 185,454 $ 24,767,734 $ 24,953,188 Real estate – construction 148 512 1,157 7,777 2,212 11,806 2,425,025 2,436,831 Commercial real estate – mortgage 7,916 1,348 2,853 78,569 34,389 125,075 10,200,605 10,325,680 Residential real estate – mortgage 45,487 14,926 1,703 106,179 71,357 239,652 13,963,891 14,203,543 Equity lines of credit 7,833 4,370 2,515 33,757 — 48,475 2,304,225 2,352,700 Equity loans 5,202 1,553 1,147 16,175 38,998 63,075 576,051 639,126 Credit card 4,840 3,361 7,672 — — 15,873 576,496 592,369 Consumer direct 7,247 2,190 2,176 853 167 12,633 767,735 780,368 Consumer indirect 47,676 8,895 2,810 4,853 — 64,234 3,185,345 3,249,579 Covered loans 5,930 3,640 44,528 136 — 54,234 419,608 473,842 Total loans $ 150,803 $ 47,832 $ 69,710 $ 395,350 $ 156,816 $ 820,511 $ 59,186,715 $ 60,007,226 December 31, 2014 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due and Impaired Not Past Due or Impaired Total (In Thousands) Commercial, financial and agricultural $ 10,829 $ 5,765 $ 1,610 $ 61,157 $ 10,127 $ 89,488 $ 23,739,049 $ 23,828,537 Real estate – construction 1,954 994 477 7,964 2,112 13,501 2,141,151 2,154,652 Commercial real estate – mortgage 9,813 4,808 628 89,736 39,841 144,826 9,732,380 9,877,206 Residential real estate – mortgage 45,279 16,510 2,598 108,357 69,408 242,152 13,680,504 13,922,656 Equity lines of credit 9,929 4,395 2,679 32,874 — 49,877 2,254,907 2,304,784 Equity loans 6,357 3,268 997 19,029 41,197 70,848 564,120 634,968 Credit card 5,692 3,921 9,441 — — 19,054 611,402 630,456 Consumer direct 9,542 1,826 2,296 799 298 14,761 638,166 652,927 Consumer indirect 35,366 7,935 2,771 2,624 — 48,696 2,821,712 2,870,408 Covered loans 6,678 4,618 47,957 114 — 59,367 435,823 495,190 Total loans $ 141,439 $ 54,040 $ 71,454 $ 322,654 $ 162,983 $ 752,570 $ 56,619,214 $ 57,371,784 Policies related to the Company's nonaccrual and past due loans are included in the Company's Consolidated Financial Statements in the Annual Report on Form 10-K for the year ended December 31, 2014 . It is the Company’s policy to classify TDRs that are not accruing interest as nonaccrual loans. It is also the Company’s policy to classify TDR past due loans that are accruing interest as TDRs and not according to their past due status. The tables above reflect this policy. The following table provides a breakout of TDRs, including nonaccrual loans and covered loans and excluding loans classified as held for sale. June 30, 2015 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due and Nonaccrual Not Past Due or Nonaccrual Total (In Thousands) Commercial, financial and agricultural $ 33 $ — $ 128 $ 1,400 $ 1,561 $ 9,532 $ 11,093 Real estate – construction — — — 516 516 2,212 2,728 Commercial real estate – mortgage — — — 4,475 4,475 34,389 38,864 Residential real estate – mortgage 3,958 311 762 27,664 32,695 66,326 99,021 Equity lines of credit — — — 25,490 25,490 — 25,490 Equity loans 2,540 491 334 10,083 13,448 35,633 49,081 Credit card — — — — — — — Consumer direct — — — 29 29 167 196 Consumer indirect — — — 1,634 1,634 — 1,634 Covered loans — — — 16 16 — 16 Total loans $ 6,531 $ 802 $ 1,224 $ 71,307 $ 79,864 $ 148,259 $ 228,123 December 31, 2014 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due and Nonaccrual Not Past Due or Nonaccrual Total (In Thousands) Commercial, financial and agricultural $ 11 $ — $ — $ 2,052 $ 2,063 $ 10,116 $ 12,179 Real estate – construction — — — 200 200 2,112 2,312 Commercial real estate – mortgage 371 536 — 7,068 7,975 38,934 46,909 Residential real estate – mortgage 2,440 2,688 844 32,518 38,490 63,436 101,926 Equity lines of credit — — — 24,519 24,519 — 24,519 Equity loans 2,182 1,124 878 12,504 16,688 37,013 53,701 Credit card — — — — — — — Consumer direct 105 — — 40 145 193 338 Consumer indirect — — — 1,490 1,490 — 1,490 Covered loans — — — 17 17 — 17 Total loans $ 5,109 $ 4,348 $ 1,722 $ 80,408 $ 91,587 $ 151,804 $ 243,391 Modifications to a borrower’s loan agreement are considered TDRs if a concession is granted for economic or legal reasons related to a borrower’s financial difficulties that otherwise would not be considered. Within each of the Company’s loan classes, TDRs typically involve modification of the loan interest rate to a below market rate or an extension or deferment of the loan. During the three months ended June 30, 2015 , $600 thousand of TDR modifications included an interest rate concession and $4.8 million of TDR modifications resulted from modifications to the loan’s structure. During the three months ended June 30, 2014 , $4.5 million of TDR modifications included an interest rate concession and $6.4 million of TDR modifications resulted from modifications to the loan’s structure. During the six months ended June 30, 2015 , $900 thousand of TDR modifications included an interest rate concession and $9.3 million of TDR modifications resulted from modifications to the loan’s structure. During the six months ended June 30, 2014 , $6.9 million of TDR modifications included an interest rate concession and $13.4 million of TDR modifications resulted from modifications to the loan’s structure. The following table presents an analysis of the types of loans that were restructured and classified as TDRs, excluding loans classified as held for sale. Three Months Ended June 30, 2015 Three Months Ended June 30, 2014 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 2 $ 236 2 $ 163 Real estate – construction — — — — Commercial real estate – mortgage 1 226 3 2,656 Residential real estate – mortgage 11 2,505 46 4,124 Equity lines of credit 28 1,351 48 2,178 Equity loans 6 778 23 1,330 Credit card — — — — Consumer direct 17 302 — — Consumer indirect — — 32 470 Covered loans 1 16 — — Six Months Ended June 30, 2015 Six Months Ended June 30, 2014 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 3 $ 311 2 $ 163 Real estate – construction — — — — Commercial real estate – mortgage 1 226 9 6,586 Residential real estate – mortgage 22 4,245 56 5,118 Equity lines of credit 59 3,264 97 4,480 Equity loans 20 1,496 41 3,317 Credit card — — — — Consumer direct 17 302 — — Consumer indirect 22 379 50 672 Covered loans 2 21 — — For the three and six months ended June 30, 2015 and 2014 , charge-offs and changes to the allowance related to modifications classified as TDRs were not material. The Company considers TDRs aged 90 days or more past due, charged off or classified as nonaccrual subsequent to modification, where the loan was not classified as a nonperforming loan at the time of modification, as subsequently defaulted. The following tables provide a summary of initial subsequent defaults that occurred within one year of the restructure date. The table excludes loans classified as held for sale as of period-end and includes loans no longer in default as of period-end. Three Months Ended June 30, 2015 Three Months Ended June 30, 2014 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction 1 377 — — Commercial real estate – mortgage — — 1 2,198 Residential real estate – mortgage 1 96 — — Equity lines of credit — — — — Equity loans — — 3 319 Credit card — — — — Consumer direct — — — — Consumer indirect — — — — Covered loans 1 6 — — Six Months Ended June 30, 2015 Six Months Ended June 30, 2014 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction 1 377 — — Commercial real estate – mortgage 1 178 1 2,198 Residential real estate – mortgage 5 743 — — Equity lines of credit — — 3 275 Equity loans 2 161 4 382 Credit card — — — — Consumer direct — — — — Consumer indirect 1 18 — — Covered loans 1 6 — — The Company’s allowance for loan losses is largely driven by updated risk ratings assigned to commercial loans, updated borrower credit scores on consumer loans, and borrower delinquency history in both commercial and consumer portfolios. As such, the provision for loan losses is impacted primarily by changes in borrower payment performance rather than TDR classification. In addition, all commercial and consumer loans modified in a TDR are considered to be impaired, even if they maintain their accrual status. At June 30, 2015 and December 31, 2014 , there were $927 thousand and $1.1 million , respectively, of commitments to lend additional funds to borrowers whose terms have been modified in a TDR. Foreclosure Proceedings Other real estate owned totaled $20 million and $21 million at June 30, 2015 and December 31, 2014 , respectively. Other real estate owned included $15 million and $11 million of foreclosed residential real estate properties at June 30, 2015 and December 31, 2014 , respectively. As of June 30, 2015 and December 31, 2014 , there were $33 million and $26 million , respectively, of residential real estate loans secured by residential real estate properties for which formal foreclosure proceedings were in process.

Loan Sales and Servicing

Loan Sales and Servicing	6 Months Ended
Loan Sales and Servicing	Jun. 30, 2015
Transfers and Servicing [Abstract]
Loan Sales and Servicing	Loan Sales and Servicing Loans held for sale were $196 million and $155 million at June 30, 2015 and December 31, 2014 , respectively, and were comprised entirely of residential real estate - mortgage loans. There were no loans transferred from the held for investment portfolio to the loans held for sale portfolio during the three and six months ended June 30, 2015 . There were $14 million of loans transferred from the held for investment portfolio to the loans held for sale portfolio during the three and six months ended June 30, 2014 . The Company recognized charge-offs upon transfer of these loans totaling $4 million for both the three and six months ended June 30, 2014 . The Company sold loans and loans held for sale, excluding loans originated for sale in the secondary market, with a recorded balance of $10 million during the three and six months ended June 30, 2015 . The Company sold loans and loans held for sale, excluding loans originated for sale in the secondary market, with a recorded balance of $39 million and $100 million , during the three and six months ended June 30, 2014 , respectively. Sales of residential real estate – mortgage loans originated for sale in the secondary market, including loans originated for sale where the Company retained servicing responsibilities, were $340 million and $585 million for the three and six months ended June 30, 2015 , respectively, and $181 million and $369 million for the three and six months ended June 30, 2014 , respectively. The Company recognized net gains of $11.4 million and $22.0 million on the sale of residential real estate mortgage loans originated for sale during the three and six months ended June 30, 2015 , respectively, and $5.8 million and $11.3 million for the three and six months ended June 30, 2014 , respectively. These gains were recorded in mortgage banking income in the Company’s Unaudited Condensed Consolidated Statements of Income. Residential Real Estate Mortgage Loans Sold with Retained Servicing During the three and six months ended June 30, 2015 , the Company sold $339 million and $584 million , respectively, of residential real estate mortgage loans originated for sale where the Company retained servicing responsibilities. During the three and six months ended June 30, 2014 , the Company sold $181 million and $369 million , respectively, of residential real estate mortgage loans originated for sale where the Company retained servicing responsibilities. For these sold loans, there is no recourse to the Company for the failures of borrowers to pay when due. Residential real estate mortgage loans sold where the Company retained servicing totaled $3.8 billion and $3.3 billion , respectively, at June 30, 2015 and December 31, 2014 . These loans are not included in loans on the Company’s Unaudited Condensed Consolidated Balance Sheets. In connection with residential real estate mortgage loans sold with retained servicing, the Company receives servicing fees based on a percentage of the outstanding balance. The Company recognized servicing fees of $5.1 million and $9.9 million during the three and six months ended June 30, 2015 , respectively. The Company recognized servicing fees of $3.7 million and $7.3 million during the three and six months ended June 30, 2014 , respectively. These fees were recorded as a component of other noninterest income in the Company’s Unaudited Condensed Consolidated Statements of Income. At June 30, 2015 and December 31, 2014 , the Company had recorded $41 million and $35 million of MSRs, respectively, under the fair value method in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets. The fair value of MSRs is significantly affected by mortgage interest rates available in the marketplace, which influence mortgage loan prepayment speeds. In general, during periods of declining rates, the fair value of MSRs declines due to increasing prepayments attributable to increased mortgage-refinance activity. During periods of rising interest rates, the fair value of MSRs generally increases due to reduced refinance activity. The Company maintains a non-qualifying hedging strategy to manage a portion of the risk associated with changes in the fair value of the MSR portfolio. This strategy includes the purchase of various trading securities. The interest income, mark-to-market adjustments and gain or loss from sale activities associated with these securities are expected to economically hedge a portion of the change in the fair value of the MSR portfolio. The following table is an analysis of the activity in the Company’s MSRs. Three Months Ended Six Months Ended 2015 2014 2015 2014 (In Thousands) Carrying value, at beginning of period $ 35,213 $ 31,828 $ 35,488 $ 30,065 Additions 3,963 1,923 6,722 4,006 Increase (decrease) in fair value: Due to changes in valuation inputs or assumptions 2,446 (2,085 ) (146 ) (1,794 ) Due to other changes in fair value (1) (751 ) (562 ) (1,193 ) (1,173 ) Carrying value, at end of period $ 40,871 $ 31,104 $ 40,871 $ 31,104 (1) Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time. See Note 8 , Fair Value of Financial Instruments , for additional disclosures related to the assumptions and estimates used in determining fair value of MSRs. At June 30, 2015 and December 31, 2014 , the sensitivity of the current fair value of the residential MSRs to immediate 10% and 20% adverse changes in key economic assumptions are included in the following table: June 30, 2015 December 31, 2014 (Dollars in Thousands) Fair value of MSRs $ 40,871 $ 35,488 Composition of residential loans serviced for others: Fixed rate mortgage loans 96.3 % 96.1 % Adjustable rate mortgage loans 3.7 3.9 Total 100.0 % 100.0 % Weighted average life (in years) 6.2 6.2 Prepayment speed: 10.8 % 10.6 % Effect on fair value of a 10% increase $ (1,494 ) $ (1,220 ) Effect on fair value of a 20% increase (2,881 ) (2,375 ) Weighted average discount rate: 10.1 % 10.1 % Effect on fair value of a 10% increase $ (1,430 ) $ (1,291 ) Effect on fair value of a 20% increase (2,760 ) (2,492 ) The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. As indicated, changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, in this table, the effect of an adverse variation in a particular assumption on the fair value of the MSRs is calculated without changing any other assumption; while in reality, changes in one assumption may result in changes in another, which may magnify or counteract the effect of the change.

Derivatives and Hedging

Derivatives and Hedging	6 Months Ended
Derivatives and Hedging	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Derivatives and Hedging The Company is a party to derivative instruments in the normal course of business for trading purposes and for purposes other than trading to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates and foreign currency exchange rates. The Company has made an accounting policy decision to not offset derivative fair value amounts under master netting agreements. See Summary of Significant Accounting Policies in the Notes to Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2014 for additional information on the Company's accounting policies related to derivative instruments and hedging activities. The following table reflects the notional amount and fair value of derivative instruments included on the Company’s Unaudited Condensed Consolidated Balance Sheets on a gross basis. June 30, 2015 December 31, 2014 Fair Value Fair Value Notional Amount Derivative Assets (1) Derivative Liabilities (2) Notional Amount Derivative Assets (1) Derivative Liabilities (2) (In Thousands) Derivatives designated as hedging instruments: Fair value hedges: Interest rate swaps related to long-term debt $ 2,123,950 $ 67,754 $ 28,088 $ 1,423,950 $ 69,700 $ — Total fair value hedges 67,754 28,088 69,700 — Cash flow hedges: Interest rate contracts: Swaps related to commercial loans 2,100,000 4,778 85 1,100,000 1,793 1,023 Swaps related to FHLB advances 320,000 — 11,968 320,000 — 13,474 Total cash flow hedges 4,778 12,053 1,793 14,497 Total derivatives designated as hedging instruments $ 72,532 $ 40,141 $ 71,493 $ 14,497 Free-standing derivatives not designated as hedging instruments: Interest rate contracts: Forward and option contracts related to held for sale mortgages $ 905,500 $ 2,956 $ 518 $ 189,000 $ 18 $ 1,576 Equity contracts: Purchased equity option related to equity-linked CDs 867,419 62,453 — 821,849 76,487 — Swap associated with sale of Visa, Inc. Class B shares 58,791 — 1,470 57,393 — 1,435 Foreign exchange contracts: Forwards related to commercial loans 577,470 2,336 3,819 602,066 5,529 612 Spots related to commercial loans 65,347 107 69 74,940 41 80 Futures contracts (3) 447,000 — — 342,000 — — Interest rate lock commitments 235,237 3,482 25 180,822 2,319 1 Written equity option related to equity-linked CDs 831,221 — 60,259 795,467 — 74,319 Trading account assets and liabilities: Interest rate contracts for customers 22,343,465 300,286 234,601 18,678,390 296,239 236,763 Commodity contracts for customers 191,683 15,775 15,689 264,491 25,569 25,448 Foreign exchange contracts for customers 427,958 8,501 7,887 425,123 8,268 7,527 Total trading account assets and liabilities 324,562 258,177 330,076 269,738 Total free-standing derivative instruments not designated as hedging instruments $ 395,896 $ 324,337 $ 414,470 $ 347,761 (1) Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets. (2) Derivative liabilities are recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets . (3) Changes in fair value are cash settled daily; therefore, there is no ending balance at any given reporting period. Hedging Derivatives The Company uses derivative instruments to manage the risk of earnings fluctuations caused by interest rate volatility. For those financial instruments that qualify and are designated as a hedging relationship, either a fair value hedge or cash flow hedge, the effect of interest rate movements on the hedged assets or liabilities will generally be offset by the derivative instrument. Fair Value Hedges The Company enters into fair value hedging relationships using interest rate swaps to mitigate the Company’s exposure to losses in value as interest rates change. Derivative instruments that are used as part of the Company’s interest rate risk management strategy include interest rate swaps that relate to the pricing of specific balance sheet assets and liabilities. Interest rate swaps generally involve the exchange of fixed and variable rate interest payments between two parties, based on a common notional principal amount and maturity date. Interest rate swaps are used to convert the Company’s fixed rate long-term debt to a variable rate. The critical terms of the interest rate swaps match the terms of the corresponding hedged items. All components of each derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. The Company recognized no gains or losses for the three and six months ended June 30, 2015 and 2014 related to hedged firm commitments no longer qualifying as a fair value hedge. At June 30, 2015 , the fair value hedges had a weighted average expected remaining term of 5.6 years . The following table reflects the change in fair value for interest rate contracts and the related hedged items as well as other gains and losses related to fair value hedges including gains and losses recognized because of hedge ineffectiveness. Gain (Loss) for the Condensed Consolidated Three Months Ended June 30, Six Months Ended June 30, Statements of Income Caption 2015 2014 2015 2014 (In Thousands) Change in fair value of interest rate contracts: Interest rate swaps hedging long term debt Interest on FHLB and other borrowings $ (40,151 ) $ 811 $ (30,033 ) $ (124 ) Hedged long term debt Interest on FHLB and other borrowings 35,536 (838 ) 26,123 219 Other gains on interest rate contracts: Interest and amortization related to interest rate swaps on hedged long term debt Interest on FHLB and other borrowings 12,178 6,016 21,744 12,032 There were no material fair value hedging gains and losses recognized because of hedge ineffectiveness for the three and six months ended June 30, 2015 and 2014 . Cash Flow Hedges The Company enters into cash flow hedging relationships using interest rate swaps and options, such as caps and floors, to mitigate exposure to the variability in future cash flows or other forecasted transactions associated with its floating rate assets and liabilities. The Company uses interest rate swaps and options to hedge the repricing characteristics of its floating rate commercial loans and FHLB advances. All components of each derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. The initial assessment of expected hedge effectiveness is based on regression analysis. The ongoing periodic measures of hedge ineffectiveness are based on the expected change in cash flows of the hedged item caused by changes in the benchmark interest rate. There were no material cash flow hedging gains or losses recognized because of hedge ineffectiveness for the three and six months ended June 30, 2015 and 2014 . There were no gains or losses reclassified from other comprehensive income because of the discontinuance of cash flow hedges related to certain forecasted transactions that are probable of not occurring for the three and six months ended June 30, 2015 and 2014 . At June 30, 2015 , cash flow hedges not terminated had a net fair value of $(7.3) million and a weighted average life of 1.9 years . Based on the current interest rate environment, $3.5 million of gains are expected to be reclassified to net interest income over the next 12 months as net settlements occur. The maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions is 6.1 years . The following table presents the effect of derivative instruments designated and qualifying as cash flow hedges on the Company’s Unaudited Condensed Consolidated Balance Sheets and the Company’s Unaudited Condensed Consolidated Statements of Income. Gain (Loss) for the Three Months Ended Six Months Ended 2015 2014 2015 2014 (In Thousands) Interest rate contracts: Net change in amount recognized in other comprehensive income $ 1,013 $ (875 ) $ 3,072 $ (1,682 ) Amount reclassified from accumulated other comprehensive income into net interest income 1,807 (564 ) 2,854 (1,727 ) Amount of ineffectiveness recognized in net interest income — — — — Derivatives Not Designated As Hedges Derivatives not designated as hedges include those that are entered into as either economic hedges as part of the Company’s overall risk management strategy or to facilitate client needs. Economic hedges are those that do not qualify to be treated as a fair value hedge, cash flow hedge or foreign currency hedge for accounting purposes, but are necessary to economically manage the risk exposure associated with the assets and liabilities of the Company. The Company also enters into a variety of interest rate contracts, commodity contracts and foreign exchange contracts in its trading activities. The primary purpose for using these derivative instruments in the trading account is to facilitate customer transactions. The trading interest rate contract portfolio is actively managed and hedged with similar products to limit market value risk of the portfolio. Changes in the estimated fair value of contracts in the trading account along with the related interest settlements on the contracts are recorded in noninterest income as corporate and correspondent investment sales in the Company's Unaudited Condensed Consolidated Statements of Income. The Company enters into forward contracts to economically hedge the change in fair value of certain residential mortgage loans held for sale due to changes in interest rates. Revaluation gains and losses from free-standing derivatives related to mortgage banking activity are recorded as a component of mortgage banking income in the Company’s Unaudited Condensed Consolidated Statements of Income. Interest rate lock commitments issued on residential mortgage loan commitments to be held for resale are also considered free-standing derivative instruments, and the interest rate exposure on these commitments is economically hedged primarily with forward contracts. Revaluation gains and losses from free-standing derivatives related to mortgage banking activity are recorded as a component of mortgage banking income in the Company's Unaudited Condensed Consolidated Statements of Income. In conjunction with the sale of its Visa, Inc. Class B shares in 2009 , the Company entered into a total return swap in which the Company will make or receive payments based on subsequent changes in the conversion rate of the Class B shares into Class A shares. This total return swap is accounted for as a free-standing derivative. The Company offers its customers equity-linked CDs that have a return linked to individual equities and equity indices. Under appropriate accounting guidance, a CD that pays interest based on changes in an equity index is a hybrid instrument that requires separation into a host contract (the CD) and an embedded derivative contract (written equity call option). The Company has entered into an offsetting derivative contract in order to economically hedge the exposure related to the issuance of equity-linked CDs. Both the embedded derivative and derivative contract entered into by the Company are classified as free-standing derivative instruments that are recorded at fair value with offsetting gains and losses recognized within noninterest expense in the Company's Unaudited Condensed Consolidated Statements of Income. The Company also enters into foreign currency contracts to hedge its exposure to fluctuations in foreign currency exchange rates due to its funding of commercial loans in foreign currencies. The net gains and losses recorded in the Company's Unaudited Condensed Consolidated Statements of Income from free-standing derivative instruments not designated as hedging instruments are summarized in the following table. Gain (Loss) for the Condensed Consolidated Three Months Ended June 30, Six Months Ended June 30, Statements of Income Caption 2015 2014 2015 2014 (In Thousands) Futures contracts Mortgage banking income and corporate and correspondent investment sales 2 (157 ) 49 (233 ) Option contracts related to mortgage servicing rights Mortgage banking income — 41 (195 ) 41 Interest rate contracts: Forward and option contracts related to residential mortgage loans held for sale Mortgage banking income 4,396 (2,594 ) 3,996 (4,148 ) Interest rate lock commitments Mortgage banking income (1,530 ) 2,139 1,139 2,931 Interest rate contracts for customers Corporate and correspondent investment sales 11,890 4,040 16,529 9,158 Commodity contracts: Commodity contracts for customers Corporate and correspondent investment sales (5 ) (105 ) 9 (97 ) Equity contracts: Purchased equity option related to equity-linked CDs Other expense (7,747 ) 2,929 (14,035 ) 6,707 Written equity option related to equity-linked CDs Other expense 7,700 (2,865 ) 14,060 (6,544 ) Foreign currency contracts: Forward contracts related to commercial loans Other income (23,483 ) (11,943 ) 23,084 (17,430 ) Spot contracts related to commercial loans Other income 3,375 2,527 (3,520 ) 3,407 Foreign currency exchange contracts for customers Corporate and correspondent investment sales 481 177 861 370 Derivatives Credit and Market Risks By using derivative instruments, the Company is exposed to credit and market risk. If the counterparty fails to perform, credit risk is equal to the extent of the Company’s fair value gain in a derivative. When the fair value of a derivative instrument contract is positive, this generally indicates that the counterparty owes the Company and, therefore, creates a credit risk for the Company. When the fair value of a derivative instrument contract is negative, the Company owes the counterparty and, therefore, it has no credit risk. The Company minimizes the credit risk in derivative instruments by entering into transactions with high-quality counterparties that are reviewed periodically. Credit losses are also mitigated through collateral agreements and other contract provisions with derivative counterparties. Market risk is the adverse effect that a change in interest rates or implied volatility rates has on the value of a financial instrument. The Company manages the market risk associated with interest rate contracts by establishing and monitoring limits as to the types and degree of risk that may be undertaken. The Company’s derivatives activities are monitored by its Asset/Liability Committee as part of its risk-management oversight. The Company’s Asset/Liability Committee is responsible for mandating various hedging strategies that are developed through its analysis of data from financial simulation models and other internal and industry sources. The resulting hedging strategies are then incorporated into the Company’s overall interest rate risk management and trading strategies. Entering into interest rate swap agreements and options involves not only the risk of dealing with counterparties and their ability to meet the terms of the contracts but also interest rate risk associated with unmatched positions. At June 30, 2015 , interest rate swap agreements and options classified as trading were substantially matched. The Company had credit risk of $325 million related to derivative instruments in the trading account portfolio, which does not take into consideration master netting arrangements or the value of the collateral. There were no credit losses associated with derivative instruments classified as trading for the three and six months ended June 30, 2015 . There were $727 thousand and $726 thousand , respectively, in net credit losses associated with derivative instruments classified as trading for the three and six months ended June 30, 2014 . At June 30, 2015 and December 31, 2014 , there were no material nonperforming derivative positions classified as trading. The Company’s derivative positions held for hedging purposes are primarily executed in the over-the-counter market. These positions at June 30, 2015 have credit risk of $73 million , which does not take into consideration master netting arrangements or the value of the collateral. There were no credit losses associated with derivative instruments classified as nontrading for the three and six months ended June 30, 2015 and 2014 . At June 30, 2015 and December 31, 2014 , there were no nonperforming derivative positions classified as nontrading. As of June 30, 2015 and December 31, 2014 , the Company had recorded the right to reclaim cash collateral of $135 million and $46 million , respectively, within other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets and had recorded the obligation to return cash collateral of $46 million and $62 million , respectively, within deposits on the Company’s Unaudited Condensed Consolidated Balance Sheets. Contingent Features Certain of the Company’s derivative instruments contain provisions that require the Company’s debt to maintain a certain credit rating from each of the major credit rating agencies. If the Company’s debt were to fall below this rating, it would be in violation of these provisions, and the counterparties to the derivative instruments could demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position on June 30, 2015 was $49 million for which the Company has collateral requirements of $48 million in the normal course of business. If the credit risk-related contingent features underlying these agreements had been triggered on June 30, 2015 , the Company’s collateral requirements to its counterparties would have increased by $1 million . The aggregate fair value of all derivative instruments with credit risk-related contingent features that were in a liability position on December 31, 2014 was $65 million for which the Company had collateral requirements of $62 million in the normal course of business. If the credit risk-related contingent features underlying these agreements had been triggered on December 31, 2014 , the Company’s collateral requirements to its counterparties would have increased by $4 million . Netting of Derivative Instruments The Company is party to master netting arrangements with its financial institution counterparties for some of its derivative and hedging activities. The Company does not offset assets and liabilities under these master netting arrangements for financial statement presentation purposes. The master netting arrangements provide for single net settlement of all derivative instrument arrangements, as well as collateral, in the event of default, or termination of, any one contract with the respective counterparties. Cash collateral is usually posted by the counterparty with a net liability position in accordance with contract thresholds. The following represents the Company’s total gross derivative instrument assets and liabilities subject to an enforceable master netting arrangement. The derivative instruments the Company has with its customers are not subject to an enforceable master netting arrangement. Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) June 30, 2015 Derivative financial assets: Subject to a master netting arrangement $ 223,166 $ — $ 223,166 $ — $ 36,739 $ 186,427 Not subject to a master netting arrangement 245,262 — 245,262 — — 245,262 Total derivative financial assets $ 468,428 $ — $ 468,428 $ — $ 36,739 $ 431,689 Derivative financial liabilities: Subject to a master netting arrangement $ 278,220 $ — $ 278,220 $ 28,835 $ 132,340 $ 117,045 Not subject to a master netting arrangement 86,258 — 86,258 — — 86,258 Total derivative financial liabilities $ 364,478 $ — $ 364,478 $ 28,835 $ 132,340 $ 203,303 December 31, 2014 Derivative financial assets: Subject to a master netting arrangement $ 225,227 $ — $ 225,227 $ — $ 58,309 $ 166,918 Not subject to a master netting arrangement 260,736 — 260,736 — — 260,736 Total derivative financial assets $ 485,963 $ — $ 485,963 $ — $ 58,309 $ 427,654 Derivative financial liabilities: Subject to a master netting arrangement $ 259,018 $ — $ 259,018 $ 29,677 $ 44,163 $ 185,178 Not subject to a master netting arrangement 103,240 — 103,240 — — 103,240 Total derivative financial liabilities $ 362,258 $ — $ 362,258 $ 29,677 $ 44,163 $ 288,418 (1) The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Securities Financing Activities

Securities Financing Activities	6 Months Ended
Securities Financing Activities	Jun. 30, 2015
Transfers and Servicing [Abstract]
Securities Financing Activities	Securities Financing Activities Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase are accounted for as secured borrowings. The following table presents the Company's related activity, by collateral type and remaining contractual maturity. June 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater Than 90 days Total (In Thousands) Securities Sold Under Agreements Repurchase: U.S. Treasury and agency securities $ 3,867,485 $ 426,293 $ 453,776 $ — $ 4,747,554 Total $ 3,867,485 $ 426,293 $ 453,776 $ — $ 4,747,554 In the event of a significant decline in fair value of the collateral pledged for the securities sold under agreements to repurchase, the Company would be required to provide additional collateral. The Company minimizes the risk by monitoring the liquidity and credit quality of the collateral, as well as the maturity profile of the transactions. At June 30, 2015 , the fair value of collateral received related to securities purchased under agreements to resell was $4.9 billion and the fair value of collateral pledged for securities sold under agreements to repurchase was $4.6 billion . At December 31, 2014 , the fair value of collateral received related to securities purchased under agreements to resell was $2.6 billion and the fair value of collateral pledged for securities sold under agreements to repurchase was $2.5 billion . Netting of Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase The Company has various financial asset and liabilities that are subject to enforceable master netting agreements or similar agreements. The Company's derivatives that are subject to enforceable master netting agreements or similar transactions are discussed in Note 5 , Derivatives and Hedging . The Company enters into agreements under which it purchases or sells securities subject to an obligation to resell or repurchase the same or similar securities. Securities purchased under agreements to resell and securities sold under agreements to repurchase are generally accounted for as collateralized financing transactions and recorded at the amounts at which the securities were purchased or sold plus accrued interest. The securities pledged as collateral are generally U.S. government and federal agency securities. Securities purchased under agreements to resell and securities sold under agreements to repurchase are governed by a MRA. Under the terms of the MRA, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the nondefaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted. These amounts are limited to the contract asset/liability balance, and accordingly, do not include excess collateral received or pledged. The Company offsets the assets and liabilities under netting arrangements for the balance sheet presentation of securities purchased under agreements to resell and securities sold under agreements to repurchase provided certain criteria are met that permit balance sheet netting. The following represents the Company’s assets/liabilities subject to an enforceable master netting arrangement. Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) June 30, 2015 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 5,157,723 $ 4,695,179 $ 462,544 $ 462,544 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 4,747,554 $ 4,695,179 $ 52,375 $ 52,375 $ — $ — December 31, 2014 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 3,100,200 $ 2,533,661 $ 566,539 $ 566,539 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 2,969,345 $ 2,533,661 $ 435,684 $ 435,684 $ — $ — (1) The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	6 Months Ended
Commitments, Contingencies and Guarantees	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Commitments to Extend Credit & Standby and Commercial Letters of Credit The following represents the Company’s commitments to extend credit, standby letters of credit and commercial letters of credit: June 30, 2015 December 31, 2014 (In Thousands) Commitments to extend credit $ 28,458,151 $ 28,369,666 Standby and commercial letters of credit 1,703,415 1,871,323 Commitments to extend credit are agreements to lend to customers 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 are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Standby and commercial letters of credit are commitments issued by the Company to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing and similar transactions, and expire in decreasing amounts with terms ranging from one to four years. The credit risk involved in issuing letters of credit and commitments is essentially the same as that involved in extending loan facilities to customers. The fair value of the letters of credit and commitments typically approximates the fee received from the customer for issuing such commitments. These fees are deferred and are recognized over the commitment period. At June 30, 2015 and December 31, 2014 , the recorded amount of these deferred fees was $6.5 million and $5.2 million , respectively. The Company holds various assets as collateral supporting those commitments for which collateral is deemed necessary. At June 30, 2015 , the maximum potential amount of future undiscounted payments the Company could be required to make under outstanding standby letters of credit was $1.7 billion . At June 30, 2015 and December 31, 2014 , the Company had reserves related to letters of credit and unfunded commitments recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheet of $86 million and $94 million , respectively. Loan Sale Recourse The Company has potential recourse related to FNMA securitizations. At June 30, 2015 and December 31, 2014 , the amount of potential recourse was $19 million and $20 million , of which the Company had reserved $740 thousand and $655 thousand , respectively, which is recorded in accrued expenses and other liabilities on the Company's Unaudited Condensed Consolidated Balance Sheets for the respective periods. The Company also issues standard representations and warranties related to mortgage loan sales to government-sponsored agencies. Although these agreements often do not specify limitations, the Company does not believe that any payments related to these representations and warranties would materially change the financial condition or results of operations of the Company. At both June 30, 2015 and December 31, 2014 , the Company recorded $1 million of reserves in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets related to potential losses from loans sold. Loss Sharing Agreement In connection with the Guaranty Bank acquisition, the Bank entered into loss sharing agreements with the FDIC that covered approximately $9.7 billion of loans and OREO, excluding the impact of purchase accounting adjustments. In accordance with the terms of the loss sharing agreements, the FDIC’s obligation to reimburse the Bank for losses with respect to the acquired loans and acquired OREO begins with the first dollar of incurred losses, as defined in the loss sharing agreements. The terms of the loss sharing agreements provide that the FDIC will reimburse the Bank for 80% of incurred losses up to $2.3 billion and 95% of incurred losses in excess of $2.3 billion . Gains and recoveries on covered assets offset incurred losses, or are paid to the FDIC, at the applicable loss share percentage at the time of recovery. The loss sharing agreements provide for FDIC loss sharing for five years for commercial loans and 10 years for single family residential loans. The loss sharing agreement for commercial loans expired in the fourth quarter of 2014. The provisions of the loss sharing agreements may also require a payment by the Bank to the FDIC on October 15, 2019 . On that date, the Bank is required to pay the FDIC 60% of the excess, if any, of (i) $457 million over (ii) the sum of (a) 25% of the total net amounts paid to the Bank under both of the loss share agreements plus (b) 20% of the deemed total cost to the Bank of administering the covered assets under the loss sharing agreements. The deemed total cost to the Bank of administering the covered assets is the sum of 2% of the average of the principal amount of covered assets based on the beginning and end of year balances for each of the 10 years during which the loss sharing agreements are in effect. At both June 30, 2015 and December 31, 2014 , the Company estimated the potential amount of payment due to the FDIC in 2019 , at the end of the loss sharing agreements, to be $145 million . The ultimate settlement amount of this payment due to the FDIC is dependent upon the performance of the underlying covered assets, the passage of time and actual claims submitted to the FDIC. See Note 3 , Loans and Allowance for Loan Losses , for additional information. Legal and Regulatory Proceedings In the ordinary course of business, the Company is subject to legal proceedings, including claims, litigation, investigations and administrative proceedings, all of which are considered incidental to the normal conduct of business. The Company believes it has substantial defenses to the claims asserted against it in its currently outstanding legal proceedings and, with respect to such legal proceedings, intends to continue to defend itself vigorously against such claims. Set forth below are descriptions of certain of the Company’s legal proceedings: In May 2013 , the Company was named as a counterclaim defendant in a lawsuit filed in the United States District Court for the Southern District of California, BBVA Compass v. Morris Cerullo World Evangelism, wherein the counterclaim plaintiff alleges the Company wrongfully failed to honor a standby letter of credit in the amount of $5.2 million . The counterclaim plaintiff seeks $5.2 million , plus other, unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In February 2015 , the Company was named as a defendant in a lawsuit filed in the Superior Court for the State of California, County of San Diego, Morris Cerullo World Evangelism v. BBVA Compass and Jack Wilkinson, wherein the plaintiff alleges the Company wrongfully failed to honor a standby letter of credit in the amount of $5.2 million . The plaintiff's allegations in this lawsuit are virtually identical to its allegations in the earlier filed federal court lawsuit. As in that lawsuit, the plaintiff seeks $5.2 million , plus other, unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In June 2013 , the Company was named as a defendant in a lawsuit filed in the United States District Court for the Northern District of Alabama, Intellectual Ventures II, LLC v. BBVA Compass Bancshares, Inc. and BBVA Compass, wherein the plaintiff alleges the Company is infringing five patents owned by the plaintiff and related to the security infrastructure for the Company's online banking services. The plaintiff seeks unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In March 2014, the Company was named as a defendant in a lawsuit filed in the Circuit Court of the Fourth Judicial Circuit in Duval County, Florida, Jack C. Demetree, et al. v. BBVA Compass, wherein the plaintiffs allege that their accountant stole approximately $17.1 million through unauthorized transactions on their accounts from 2009 to 2013 , and that BBVA Compass enabled the theft. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In November 2014 , the Company was named as a defendant in a lawsuit filed in the United States District Court for the Western District of Texas, Maxim Integrated Products v. Compass Bank, wherein the plaintiff alleges the Company is infringing three patents owned by the plaintiff and related to data encryption for the Company’s mobile banking applications. The plaintiff seeks unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. The Company (including the Bank) is or may become involved from time to time in information-gathering requests, reviews, investigations and proceedings (both formal and informal) by various governmental regulatory agencies, law enforcement authorities and self-regulatory bodies regarding the Company’s business. Such matters could develop into administrative, civil, or criminal proceeding or enforcement actions and may result in material adverse consequences, including without limitation adverse judgments, settlements, fines, penalties, orders, injunctions, alterations in the Company’s business practices or other actions, and could result in additional expenses and collateral costs, including reputational damage, which could have a material adverse impact on the Company’s business, consolidated financial position, results of operations or cash flows. The Company owns all of the outstanding stock of BSI, a registered broker-dealer. Applicable law limits BSI from deriving more than 25 percent of its gross revenues from underwriting or dealing in bank-ineligible securities (“ineligible revenue”). Prior to the contribution of BSI to the Company in April 2013, BSI’s ineligible revenues in certain periods exceeded the 25 percent limit. It is possible that the Federal Reserve Board may take either formal or informal enforcement action against BSI and the Company and civil money penalties cannot be excluded. At this time, the Company does not know the amount of a potential civil money penalty, if any. There are other litigation matters that arise in the normal course of business. The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that the Company will incur a loss and the amount of the loss can be reasonably estimated, the Company records a liability in its consolidated financial statements. These legal reserves may be increased or decreased to reflect any relevant developments. Where a loss is not probable or the amount of loss is not estimable, the Company does not accrue legal reserves. At June 30, 2015 , the Company had accrued legal reserves in the amount of $13 million . Additionally, for those matters where a loss is both estimable and reasonably possible, the Company estimates losses that it could incur beyond the accrued legal reserves. Under U.S. GAAP, an event is “reasonably possible” if “the chance of the future event or events occurring is more than remote but less than likely” and an event is “remote” if “the chance of the future event or events occurring is slight.” At June 30, 2015 , there were no such matters where a loss was both estimable and reasonably possible beyond the accrued legal reserve. While the outcome of legal proceedings and the timing of the ultimate resolution are inherently difficult to predict, based on information currently available, advice of counsel and available insurance coverage, the Company believes that it has established adequate legal reserves. Further, based upon available information, the Company is of the opinion that these legal proceedings, individually or in the aggregate, will not have a material adverse effect on the Company’s financial condition or results of operations. However, in the event of unexpected future developments, it is possible that the ultimate resolution of those matters, if unfavorable, may be material to the Company’s results of operations for any particular period, depending, in part, upon the size of the loss or liability imposed and the operating results for the applicable period. Income Tax Review The Company is subject to review and examination from various tax authorities. The Company is currently under examination by the IRS and a number of states, and has received notices of proposed adjustments related to federal and state income taxes due for prior years. Management believes that adequate provisions for income taxes have been recorded.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
Fair Value of Financial Instruments	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company applies the fair value accounting guidance required under ASC Topic 820 which establishes a framework for measuring fair value. This guidance defines fair value as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. This guidance also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within this fair value hierarchy is based upon the lowest level of input that is significant to the instrument’s fair value measurement. The three levels within the fair value hierarchy are described as follows. • Level 1 – Fair value is based on quoted prices in an active market for identical assets or liabilities. • Level 2 – Fair value is based on quoted market prices for similar instruments traded in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 – Fair value is based on 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 would include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar pricing techniques based on the Company’s own assumptions about what market participants would use to price the asset or liability. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments under the fair value hierarchy, is set forth below. These valuation methodologies were applied to the Company’s financial assets and financial liabilities carried at fair value. In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use observable market based parameters as inputs. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among other things, as well as other unobservable parameters. Any such valuation adjustments are applied consistently over time. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, the reported fair value amounts have not been comprehensively revalued since the presentation dates, and, therefore, estimates of fair value after the balance sheet date may differ significantly from the amounts presented herein. Financial Instruments Measured at Fair Value on a Recurring Basis Trading account assets and liabilities, securities available for sale, certain mortgage loans held for sale, derivative assets and liabilities, and mortgage servicing rights are recorded at fair value on a recurring basis. The following is a description of the valuation methodologies for these assets and liabilities. Trading account assets and liabilities and investment securities available for sale – Trading account assets and liabilities and investment securities available for sale consist of U.S. Treasury and other U.S. government agencies securities, mortgage-backed securities, collateralized mortgage obligations, debt obligations of state and political subdivisions, other debt and equity securities, and derivative contracts. • U.S. Treasury and other U.S. government agencies securities are valued based on quoted market prices of identical assets on active exchanges (Level 1 measurements) or are valued based on a market approach using observable inputs such as benchmark yields, reported trades, broker/dealer quotes, benchmark securities, and bids/offers of government-sponsored enterprise securities (Level 2 measurements). • Mortgage-backed securities are primarily valued using market-based pricing matrices that are based on observable inputs including benchmark To Be Announced security prices, U.S. Treasury yields, U.S. dollar swap yields, and benchmark floating-rate indices. Mortgage-backed securities pricing may also give consideration to pool-specific data such as prepayment history and collateral characteristics. Valuations for mortgage-backed securities are therefore classified as Level 2 measurements. • Collateralized mortgage obligations are valued using market-based pricing matrices that are based on observable inputs including reported trades, bids, offers, dealer quotes, U.S. Treasury yields, U.S. dollar swap yields, market convention prepayment speeds, tranche-specific characteristics, prepayment history, and collateral characteristics. Fair value measurements for collateralized mortgage obligations are classified as Level 2. • Debt obligations of states and political subdivisions are primarily valued using market-based pricing matrices that are based on observable inputs including Municipal Securities Rulemaking Board reported trades, issuer spreads, material event notices, and benchmark yield curves. These valuations are Level 2 measurements. • Other debt and equity securities consist of mutual funds, foreign and corporate debt, and U.S. government agencies equity securities. Mutual funds are valued based on quoted market prices of identical assets trading on active exchanges. These valuations are Level 1 measurements. Foreign and corporate debt valuations are based on information and assumptions that are observable in the market place. The valuations for these securities are therefore classified as Level 2. U.S. government agency equity securities are valued based on quoted market prices of identical assets trading on active exchanges. These valuations thus qualify as Level 1 measurements. • Other derivative assets and liabilities consist primarily of interest rate and commodity contracts. The Company’s interest rate contracts are valued utilizing Level 2 observable inputs (yield curves and volatilities) to determine a current market price for each interest rate contract. Commodity contracts are priced using raw market data, primarily in the form of quotes for fixed and basis swaps with monthly, quarterly, seasonal or calendar-year terms. Proprietary models provided by a third party are used to generate forward curves and volatility surfaces. As a result of the valuation process and observable inputs used, commodity contracts are classified as Level 2 measurements. To validate the reasonableness of these calculations, management compares the assumptions with market information. • Other trading assets primarily consist of interest-only strips which are valued by an independent third-party. The independent third-party values the assets on a loan-by-loan basis using a discounted cash flow analysis that employs prepayment assumptions, discount rate assumptions, and default curves. The prepayment assumptions are created from actual SBA pool prepayment history. The discount rates are derived from actual SBA loan secondary market transactions. The default curves are created using historical observable and unobservable inputs. As such, interest-only strips are classified as Level 3 measurements. The Company’s SBA department is responsible for ensuring the appropriate application of the valuation, capitalization, and amortization policies of the Company’s interest-only strips. The department performs independent, internal valuations of the interest-only strips on a quarterly basis, which are then reconciled to the third-party valuations to ensure their validity. Loans held for sale – The Company has elected to apply the fair value option for single family real estate mortgage loans originated for resale in the secondary market. The election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting. The Company has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. The fair value of loans held for sale is based on what secondary markets are currently offering for portfolios with similar characteristics. The changes in fair value of these assets are largely driven by changes in interest rates subsequent to loan funding and changes in the fair value of servicing associated with the mortgage loan held for sale. Both the mortgage loans held for sale and the related forward contracts are classified as Level 2. At both June 30, 2015 and December 31, 2014 , no material loans held for sale for which the fair value option was elected were 90 days or more past due or were in nonaccrual. Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest and fees on loans in the Company's Unaudited Condensed Consolidated Statements of Income. Net (losses) gains of $(2.6) million and $5.4 million resulting from changes in fair value of these loans were recorded in noninterest income during the three months ended June 30, 2015 and 2014 , respectively. Net (losses) gains of $(2.1) million and $6.1 million resulting from changes in fair value of these loans were recorded in noninterest income during the six months ended June 30, 2015 and 2014 , respectively. The Company also had fair value changes on forward contracts related to residential mortgage loans held for sale of approximately $4.4 million and $(2.6) million for the three months ended June 30, 2015 and 2014 , respectively. The Company also had fair value changes on forward contracts related to residential mortgage loans held for sale of approximately $4.0 million and $(4.1) million for the six months ended June 30, 2015 and 2014 , respectively. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. The following tables summarize the difference between the aggregate fair value and the aggregate unpaid principal balance for residential mortgage loans measured at fair value. Aggregate Fair Value Aggregate Unpaid Principal Balance Difference (In Thousands) June 30, 2015 Residential mortgage loans held for sale $ 195,616 $ 191,433 $ 4,183 December 31, 2014 Residential mortgage loans held for sale $ 154,816 $ 148,564 $ 6,252 Derivative assets and liabilities – Derivative assets and liabilities are measured using models that primarily use market observable inputs, such as quoted security prices, and are accordingly classified as Level 2. The derivative assets and liabilities classified within Level 3 of the fair value hierarchy were comprised of interest rate lock commitments that are valued using third-party software that calculates fair market value considering current quoted TBA and other market based prices and then applies closing ratio assumptions based on software-produced pull through ratios that are generated using the Company’s historical fallout activity. Based upon this process, the fair value measurement obtained for these financial instruments is deemed a Level 3 classification. The Company's Secondary Marketing Committee is responsible for the appropriate application of the valuation policies and procedures surrounding the Company’s interest rate lock commitments. Policies established to govern mortgage pipeline risk management activities must be approved by the Company’s Asset/Liability Committee on an annual basis. Other assets – Other assets measured at fair value on a recurring basis and classified within Level 3 of the fair value hierarchy were comprised of MSRs that are valued through a discounted cash flow analysis using a third-party commercial valuation system. The valuation takes into consideration the objective characteristics of the MSR portfolio, such as loan amount, note rate, service fee, loan term, and common industry assumptions, such as servicing costs, ancillary income, prepayment estimates, earning rates, cost of fund rates, discount rates, etc. The Company’s portfolio-specific factors are also considered in calculating the fair value of MSRs to the extent one can reasonably assume a buyer would also incorporate these factors. Examples of such factors are geographical concentrations of the portfolio, liquidity considerations such as housing authority loans which have a limited number of approved servicers, or additional views of risk not inherently accounted for in prepayment assumptions. Product liquidity and these other risks are generally incorporated through adjustment of discount factors applied to forecasted cash flows. Based on this method of pricing MSRs, the fair value measurement obtained for these financial instruments is deemed a Level 3 classification. The value of the MSR is calculated by a third-party firm that specializes in the MSR market and valuation services. Additionally, the Company obtains a valuation from an independent party to compare for reasonableness. The Company’s Secondary Marketing Committee is responsible for ensuring the appropriate application of valuation, capitalization, and fair value decay policies for the MSR portfolio. The Committee meets at least monthly to review the MSR portfolio. The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs June 30, 2015 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 4,540,788 $ 4,540,788 $ — $ — State and political subdivisions 1,332 — 1,332 — Other debt securities 9,428 — 9,428 — Interest rate contracts 300,286 — 300,286 — Commodity contracts 15,775 — 15,775 — Foreign exchange contracts 8,501 — 8,501 — Other trading assets 3,015 — 1,615 1,400 Total trading account assets 4,879,125 4,540,788 336,937 1,400 Loans held for sale 195,616 — 195,616 — Investment securities available for sale: U.S. Treasury and other U.S. government agencies 2,666,108 1,423,594 1,242,514 — Mortgage-backed securities 4,293,833 — 4,293,833 — Collateralized mortgage obligations 2,482,660 — 2,482,660 — States and political subdivisions 370,781 — 370,781 — Other debt securities 24,241 24,241 — — Equity securities (1) 300 49 — 251 Total investment securities available for sale 9,837,923 1,447,884 8,389,788 251 Derivative assets: Interest rate contracts 78,970 — 75,488 3,482 Equity contracts 62,453 — 62,453 — Foreign exchange contracts 2,443 — 2,443 — Total derivative assets 143,866 — 140,384 3,482 Other assets 40,871 — — 40,871 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 4,829,553 $ 4,829,553 $ — $ — Other debt securities 2,525 — 2,525 — Interest rate contracts 234,601 — 234,601 — Commodity contracts 15,689 — 15,689 — Foreign exchange contracts 7,887 — 7,887 — Other trading liabilities 76 — 76 — Total trading account liabilities 5,090,331 4,829,553 260,778 — Derivative liabilities: Interest rate contracts 40,684 — 40,659 25 Equity contracts 60,259 — 60,259 — Foreign exchange contracts 3,888 — 3,888 — Total derivative liabilities 104,831 — 104,806 25 (1) Excludes $555 million of FHLB and Federal Reserve stock required to be owned by the Company at June 30, 2015 . These securities are carried at par. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2014 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 2,502,308 $ 2,502,308 $ — $ — Interest rate contracts 296,239 — 296,239 — Commodity contracts 25,569 — 25,569 — Foreign exchange contracts 8,268 — 8,268 — Other trading assets 2,013 — 423 1,590 Total trading account assets 2,834,397 2,502,308 330,499 1,590 Loans held for sale 154,816 — 154,816 — Investment securities available for sale: U.S. Treasury and other U.S. government agencies 2,313,542 1,298,040 1,015,502 — Mortgage-backed securities 4,423,835 — 4,423,835 — Collateralized mortgage obligations 2,488,579 — 2,488,579 — States and political subdivisions 467,315 — 467,315 — Other debt securities 44,441 44,441 — — Equity securities (1) 48 44 — 4 Total investment securities available for sale 9,737,760 1,342,525 8,395,231 4 Derivative assets: Interest rate contracts 73,830 — 71,511 2,319 Equity contracts 76,487 — 76,487 — Foreign exchange contracts 5,570 — 5,570 — Total derivative assets 155,887 — 153,568 2,319 Other assets 35,488 — — 35,488 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 2,545,299 $ 2,545,299 $ — $ — Interest rate contracts 236,763 — 236,763 — Commodity contracts 25,448 — 25,448 — Foreign exchange contracts 7,527 — 7,527 — Other trading liabilities 425 — 425 — Total trading account liabilities 2,815,462 2,545,299 270,163 — Derivative liabilities: Interest rate contracts 16,074 — 16,073 1 Equity contracts 74,319 — 74,319 — Foreign exchange contracts 692 — 692 — Total derivative liabilities 91,085 — 91,084 1 (1) Excludes $500 million of FHLB and Federal Reserve stock required to be owned by the Company at December 31, 2014 . These securities are carried at par. There were no transfers between Levels 1 or 2 of the fair value hierarchy for the three and six months ended June 30, 2015 and 2014 . It is the Company’s policy to value any transfers between levels of the fair value hierarchy based on end of period fair values. The following table reconciles the assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3). Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Three Months Ended June 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) Balance, April 1, 2014 $ 1,692 $ 6 $ 1,682 $ 31,828 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) 17 — 2,139 (2,647 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 1,923 Sales — — — — Settlements — — — — Balance, June 30, 2014 $ 1,709 $ 6 $ 3,821 $ 31,104 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2014 $ 17 $ — $ 2,139 $ (2,647 ) Balance, April 1, 2015 $ 1,436 $ 80 $ 4,987 $ 35,213 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (36 ) — (1,530 ) 1,695 Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 171 — — Issuances — — — 3,963 Sales — — — — Settlements — — — — Balance, June 30, 2015 $ 1,400 $ 251 $ 3,457 $ 40,871 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2015 $ (36 ) $ — $ (1,530 ) $ 1,695 (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income. Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Six Months Ended June 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) Balance, January 1, 2014 $ 1,645 $ 6 $ 890 $ 30,065 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) 64 — 2,931 (2,967 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 4,006 Sales — — — — Settlements — — — — Balance, June 30, 2014 $ 1,709 $ 6 $ 3,821 $ 31,104 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2014 $ 64 $ — $ 2,931 $ (2,967 ) Balance, January 1, 2015 $ 1,590 $ 4 $ 2,318 $ 35,488 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (190 ) — 1,139 (1,339 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 247 — — Issuances — — — 6,722 Sales — — — — Settlements — — — — Balance, June 30, 2015 $ 1,400 $ 251 $ 3,457 $ 40,871 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2015 $ (190 ) $ — $ 1,139 $ (1,339 ) (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income. Assets Measured at Fair Value on a Nonrecurring Basis Periodically, certain assets may be recorded at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of lower of cost or fair value accounting or write-downs of individual assets due to impairment. The following table represents those assets that were subject to fair value adjustments during the three and six months ended June 30, 2015 and 2014 and still held as of the end of the period, and the related gains and losses from fair value adjustments on assets sold during the period as well as assets still held as of the end of the period. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) June 30, 2015 (Level 1) (Level 2) (Level 3) Three Months Ended June 30, 2015 Six Months Ended June 30, 2015 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 15,621 $ — $ — $ 15,621 $ (1,013 ) $ (1,298 ) Impaired loans (1) 179,288 — — 179,288 (1,549 ) (4,853 ) OREO 20,188 — — 20,188 (923 ) (2,182 ) Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) June 30, 2014 (Level 1) (Level 2) (Level 3) Three Months Ended June 30, 2014 Six Months Ended June 30, 2014 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 3,690 $ — $ — $ 3,690 $ (34 ) $ (180 ) Impaired loans (1) 131,622 — — 131,622 (14,532 ) (18,875 ) OREO 21,113 — — 21,113 (689 ) (1,582 ) (1) Total gains (losses) represent charge-offs on impaired loans for which adjustments are based on the appraised value of the collateral. The following is a description of the methodologies applied for valuing these assets: Investment securities held to maturity – Nonrecurring fair value adjustments on investment securities held to maturity reflect impairment write-downs which the Company believes are other than temporary. For analyzing these securities, the Company has retained a third party valuation firm. Impairment is determined through the use of cash flow models that estimate cash flows on the underlying mortgages using security-specific collateral and the transaction structure. The cash flow models incorporate the remaining cash flows which are adjusted for future expected credit losses. Future expected credit losses are determined by using various assumptions such as current default rates, prepayment rates, and loss severities. The Company develops these assumptions through the use of market data published by third party sources in addition to historical analysis which includes actual delinquency and default information through the current period. The expected cash flows are then discounted at the interest rate used to recognize interest income on the security to arrive at a present value amount. As the fair value measurements are derived using a discounted cash flow modeling approach, the nonrecurring fair value measurements are classified as Level 3. Impaired Loans – Impaired loans measured at fair value on a non-recurring basis represent the carrying value of impaired loans for which adjustments are based on the appraised value of the collateral. Nonrecurring fair value adjustments to impaired loans reflect full or partial write-downs that are generally based on the fair value of the underlying collateral supporting the loan. Loans subjected to nonrecurring fair value measurements based on the current estimated fair value of the collateral are classified as Level 3. OREO – OREO is recorded on the Company's Unaudited Condensed Consolidated Balance Sheets at the lower of recorded balance or fair value, which is based on appraisals and third-party price opinions, less estimated costs to sell. The fair value is classified as Level 3. The table below presents quantitative information about the significant unobservable inputs for material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring and nonrecurring basis. Quantitative Information about Level 3 Fair Value Measurements Fair Value at Range of Unobservable Inputs June 30, 2015 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Other trading assets $ 1,400 Discounted cash flow Default rate 8.3% Prepayment rate 5.6% - 9.9% (7.4%) Interest rate contracts 3,457 Discounted cash flow Closing ratios (pull-through) 6.9% - 98.7% (65.7%) Cap grids 0.2% - 2.5% (1.1%) Other assets - MSRs 40,871 Discounted cash flow Discount rate 10.0% - 11.0% (10.1%) Constant prepayment rate or life speed 6.1% - 51.5% (10.8%) Cost to service $64 - $766 ($67) Nonrecurring fair value measurements: Investment securities held to maturity $ 15,621 Discounted cash flow Prepayment rate 9.6% Default rate 7.5% Loss severity 61.2% Expected loss 7.9% Impaired loans 179,288 Appraised value Appraised value 0.0% - 100.0% (26.7%) OREO 20,188 Appraised value Appraised value 8.0% The following provides a description of the sensitivity of the valuation technique to changes in unobservable inputs for recurring fair value measurements. Recurring Fair Value Measurements Using Significant Unobservable Inputs Other Trading Assets – Interest-Only Strips Significant unobservable inputs used in the valuation of the Company’s interest-only strips include default rates and prepayment assumptions. Significant increases in either of these inputs in isolation would result in significantly lower fair value measurements. Generally, a change in the assumption used for the probability of default is accompanied by a directionally opposite change in the assumption used for prepayment rates. Interest Rate Contracts - Interest Rate Lock Commitments Significant unobservable inputs used in the valuation of interest rate lock commitments are pull-through and cap grids. Increases or decreases in the pull-through or cap grids will have a corresponding impact in the value of interest rate contracts. Other Assets - MSRs The significant unobservable inputs used in the fair value measurement of MSRs are discount rates, constant prepayment rate or life speed, and cost to service assumptions. The impact of prepayments and changes in the discount rate are based on a variety of underlying inputs. Increases or decreases to the underlying cash flow inputs will have a corresponding impact on the value of the MSR asset. The impact of the costs to service assumption will have a directionally opposite change in the fair value of the MSR asset. Fair Value of Financial Instruments The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments, excluding financial instruments measured at fair value on a recurring basis, are as follows: June 30, 2015 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 3,865,421 $ 3,865,421 $ 3,865,421 $ — $ — Investment securities held to maturity 1,375,075 1,281,338 — — 1,281,338 Loans, net 59,285,755 56,569,439 — — 56,569,439 Liabilities: Deposits $ 62,499,369 $ 62,602,507 $ — $ 62,602,507 $ — FHLB and other borrowings 6,778,066 6,780,159 — 6,780,159 — Federal funds purchased and securities sold under agreements to repurchase 623,400 623,400 — 623,400 — December 31, 2014 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 3,388,405 $ 3,388,405 $ 3,388,405 $ — $ — Investment securities held to maturity 1,348,354 1,275,963 — — 1,275,963 Loans, net 56,686,743 54,551,442 — — 54,551,442 Liabilities: Deposits $ 61,189,716 $ 61,263,812 $ — $ 61,263,812 $ — FHLB and other borrowings 4,809,843 4,786,152 — 4,786,152 — Federal funds purchased and securities sold under agreements to repurchase 1,129,503 1,129,503 — 1,129,503 — The following methods and assumptions were used by the Company in estimating the fair value of its financial instruments not carried at fair value: Cash and cash equivalents : Cash and cash equivalents have maturities of three months or less. Accordingly, the carrying amount approximates fair value. Because these amounts generally relate to either currency or highly liquid assets, these are considered a Level 1 measurement. Investment securities held to maturity: The fair values of securities held to maturity are estimated using a discounted cash flow approach. The discounted cash flow model uses inputs such as estimated prepayment speed, loss rates, and default rates. They are considered a Level 3 measurement as the valuation employs significant unobservable inputs. Loans : Loans are presented net of the allowance for loan losses and are valued using discounted cash flows. The discount rates used to determine the present value of these loans are based on current market interest rates for loans with similar credit risk and term. They are considered a Level 3 measurement as the valuation employs significant unobservable inputs. Deposits : The fair values of demand deposits are equal to the carrying amounts. Demand deposits include noninterest bearing demand deposits, savings accounts, NOW accounts and money market demand accounts. Discounted cash flows have been used to value fixed rate term deposits. The discount rate used is based on interest rates currently being offered by the Company on comparable deposits as to amount and term. They are considered a Level 2 measurement as the valuation primarily employs observable inputs for similar instruments. FHLB and other borrowings : The fair value of the Company’s fixed rate borrowings, which includes the Company’s Capital Securities, are estimated using discounted cash flows, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. The carrying amount of the Company’s variable rate borrowings approximates fair value. As such, these borrowings are considered a Level 2 measurement as the valuation primarily employs observable inputs for similar instruments. Federal funds purchased and securities sold under agreements to repurchase : The carrying amounts of federal funds purchased and securities sold under agreements to repurchase approximate fair value. They are therefore considered a Level 2 measurement.

Comprehensive Income

Comprehensive Income	6 Months Ended
Comprehensive Income	Jun. 30, 2015
Equity [Abstract]
Comprehensive Income	Comprehensive Income Comprehensive income is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances arising from nonowner sources. The following summarizes the change in the components of other comprehensive income (loss). Three Months Ended June 30, 2015 2014 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income (loss): Unrealized holding gains (losses) arising during period from securities available for sale $ (43,935 ) $ (19,124 ) $ (24,811 ) $ 40,454 $ 14,539 $ 25,915 Less: reclassification adjustment for net gains on sale of securities in net income 27,399 11,927 15,472 21,464 7,712 13,752 Net change in unrealized gains (losses) on securities available for sale (71,334 ) (31,051 ) (40,283 ) 18,990 6,827 12,163 Change in unamortized net holding losses on investment securities held to maturity 3,531 1,537 1,994 2,694 967 1,727 Less: non-credit related impairment on investment securities held to maturity — — — — — — Change in unamortized non-credit related impairment on investment securities held to maturity 456 198 258 369 132 237 Net change in unamortized holding losses on securities held to maturity 3,987 1,735 2,252 3,063 1,099 1,964 Unrealized holding gains (losses) arising during period from cash flow hedge instruments 1,795 782 1,013 (1,365 ) (490 ) (875 ) Change in defined benefit plans — — — — — — Other comprehensive income (loss) $ (65,552 ) $ (28,534 ) $ (37,018 ) $ 20,688 $ 7,436 $ 13,252 Six Months Ended June 30, 2015 2014 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income (loss): Unrealized holding gains arising during period from securities available for sale $ 20,855 $ 9,078 $ 11,777 $ 81,416 $ 29,261 $ 52,155 Less: reclassification adjustment for net gains on sale of securities in net income 60,231 26,219 34,012 37,898 13,620 24,278 Net change in unrealized gains (losses) on securities available for sale (39,376 ) (17,141 ) (22,235 ) 43,518 15,641 27,877 Change in unamortized net holding losses on investment securities held to maturity 6,673 2,905 3,768 7,468 2,683 4,785 Less: non-credit related impairment on investment securities held to maturity 87 38 49 235 84 151 Change in unamortized non-credit related impairment on investment securities held to maturity 732 318 414 754 271 483 Net change in unamortized holding losses on securities held to maturity 7,318 3,185 4,133 7,987 2,870 5,117 Unrealized holding gains (losses) arising during period from cash flow hedge instruments 5,441 2,369 3,072 (2,626 ) (944 ) (1,682 ) Change in defined benefit plans 2,716 1,001 1,715 (2,672 ) (1,001 ) (1,671 ) Other comprehensive income (loss) $ (23,901 ) $ (10,586 ) $ (13,315 ) $ 46,207 $ 16,566 $ 29,641 Activity in accumulated other comprehensive income (loss), net of tax was as follows: Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity Accumulated Gains (Losses) on Cash Flow Hedging Instruments Defined Benefit Plan Adjustment Unamortized Impairment Losses on Investment Securities Held to Maturity Total (In Thousands) Balance, January 1, 2014 $ (31,490 ) $ (5,289 ) $ (41,921 ) $ (9,236 ) $ (87,936 ) Other comprehensive income (loss) before reclassifications 52,155 (2,789 ) — (151 ) 49,215 Amounts reclassified from accumulated other comprehensive income (loss) (19,493 ) 1,107 (1,671 ) 483 (19,574 ) Net current period other comprehensive income (loss) 32,662 (1,682 ) (1,671 ) 332 29,641 Balance, June 30, 2014 $ 1,172 $ (6,971 ) $ (43,592 ) $ (8,904 ) $ (58,295 ) Balance, January 1, 2015 $ 4,469 $ (7,189 ) $ (41,121 ) $ (7,516 ) $ (51,357 ) Other comprehensive income (loss) before reclassifications 11,777 4,684 — (49 ) 16,412 Amounts reclassified from accumulated other comprehensive income (loss) (30,244 ) (1,612 ) 1,715 414 (29,727 ) Net current period other comprehensive income (loss) (18,467 ) 3,072 1,715 365 (13,315 ) Balance, June 30, 2015 $ (13,998 ) $ (4,117 ) $ (39,406 ) $ (7,151 ) $ (64,672 ) The following table presents information on reclassifications out of accumulated other comprehensive income. Details About Accumulated Other Comprehensive Income Components Amounts Reclassified From Accumulated Other Comprehensive Income (1) Condensed Consolidated Statement of Income Caption Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 (In Thousands) Unrealized Gains on Securities Available for Sale and Transferred to Held to Maturity $ 27,399 $ 21,464 $ 60,231 $ 37,898 Investment securities gains, net (3,531 ) (2,694 ) (6,673 ) (7,468 ) Interest on investment securities held to maturity 23,868 18,770 53,558 30,430 (10,390 ) (6,745 ) (23,314 ) (10,937 ) Income tax expense $ 13,478 $ 12,025 $ 30,244 $ 19,493 Net of tax Accumulated Gains (Losses) on Cash Flow Hedging Instruments $ 3,526 $ 1,212 $ 6,339 $ 1,824 Interest and fees on loans (1,719 ) (1,776 ) (3,485 ) (3,551 ) Interest and fees on FHLB advances 1,807 (564 ) 2,854 (1,727 ) (786 ) 203 (1,242 ) 620 Income tax (expense) benefit $ 1,021 $ (361 ) $ 1,612 $ (1,107 ) Net of tax Defined Benefit Plan Adjustment $ — $ — $ (2,716 ) $ 2,672 (2) — — 1,001 (1,001 ) Income tax (expense) benefit $ — $ — $ (1,715 ) $ 1,671 Net of tax Unamortized Impairment Losses on Investment Securities Held to Maturity $ (456 ) $ (369 ) $ (732 ) $ (754 ) Interest on investment securities held to maturity 198 132 318 271 Income tax benefit $ (258 ) $ (237 ) $ (414 ) $ (483 ) Net of tax (1) Amounts in parentheses indicate debits to the consolidated statement of income. (2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 18, Benefit Plans, in the Notes to the December 31, 2014, Consolidated Financial Statements for additional details).

Supplemental Disclosure for Sta

Supplemental Disclosure for Statement of Cash Flows	6 Months Ended
Supplemental Disclosure for Statement of Cash Flows	Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosure for Statement of Cash Flows	Supplemental Disclosure for Statement of Cash Flows The following table presents the Company’s supplemental disclosures for statement of cash flows. Six Months Ended June 30, 2015 2014 (In Thousands) Supplemental disclosures of cash flow information: Interest paid $ 176,360 $ 134,941 Net income taxes paid 76,448 28,025 Supplemental schedule of noncash investing and financing activities: Transfer of loans and loans held for sale to OREO $ 9,229 $ 11,614 Change in unrealized gain (loss) on available for sale securities (39,376 ) 43,518 Issuance of restricted stock, net of cancellations 458 (1,060 ) Business combinations: Assets acquired — 117,068 Liabilities assumed — 18,329

Segment Information

Segment Information	6 Months Ended
Segment Information	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s operating segments are based on the Company’s organizational structure. Each segment reflects the manner in which financial information is evaluated by management. The operating segment results include certain overhead allocations and intercompany transactions. All intercompany transactions have been eliminated to determine the consolidated balances. The Company operates primarily in the United States, and, accordingly, revenue and assets outside the United States are not material. There are no individual customers whose revenues exceeded 10% of consolidated revenue. During the first quarter of 2015, the Company reorganized its internal management structure and, accordingly, its segment reporting structure. As a result of this reorganization, the Wealth and Retail and Commercial operating segments were combined into one operating segment, Consumer and Commercial Banking. Prior periods' information has been restated to conform to the current periods' presentation. The Company's reportable operating segments now consist of Consumer and Commercial Banking, Corporate and Investment Banking, Treasury, and Corporate Support and Other. The following tables present the segment information for the Company’s segments. Three Months Ended June 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 494,464 $ 39,078 $ 416 $ (41,976 ) $ 491,982 Allocated provision for loan losses 21,072 6,275 — 18,802 46,149 Noninterest income 192,596 47,213 29,336 (10,576 ) 258,569 Noninterest expense 426,040 39,103 4,930 49,563 519,636 Net income (loss) before income tax expense (benefit) 239,948 40,913 24,822 (120,917 ) 184,766 Income tax expense (benefit) 83,982 14,319 8,688 (58,873 ) 48,116 Net income (loss) 155,966 26,594 16,134 (62,044 ) 136,650 Less: net income attributable to noncontrolling interests 156 — 434 — 590 Net income (loss) attributable to shareholder $ 155,810 $ 26,594 $ 15,700 $ (62,044 ) $ 136,060 Average assets $ 53,620,135 $ 12,955,832 $ 14,188,771 $ 7,101,212 $ 87,865,950 Three Months Ended June 30, 2014 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income $ 464,614 $ 35,429 $ 3,632 $ (4,901 ) $ 498,774 Allocated provision for loan losses 38,252 8,294 — (1,294 ) 45,252 Noninterest income 173,768 45,855 25,755 (9,933 ) 235,445 Noninterest expense 429,214 40,543 3,397 72,108 545,262 Net income (loss) before income tax expense (benefit) 170,916 32,447 25,990 (85,648 ) 143,705 Income tax expense (benefit) 63,666 12,086 9,681 (49,303 ) 36,130 Net income (loss) 107,250 20,361 16,309 (36,345 ) 107,575 Less: net income attributable to noncontrolling interests 65 — 439 — 504 Net income (loss) attributable to shareholder $ 107,185 $ 20,361 $ 15,870 $ (36,345 ) $ 107,071 Average assets $ 49,120,763 $ 7,270,019 $ 12,738,181 $ 6,875,978 $ 76,004,941 Six Months Ended June 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 976,875 $ 78,963 $ 18,798 $ (73,625 ) $ 1,001,011 Allocated provision for loan losses 51,418 17,248 — 19,514 88,180 Noninterest income 368,930 96,700 63,192 (20,983 ) 507,839 Noninterest expense 851,399 78,539 10,027 102,390 1,042,355 Net income (loss) before income tax expense (benefit) 442,988 79,876 71,963 (216,512 ) 378,315 Income tax expense (benefit) 155,046 27,957 25,187 (108,292 ) 99,898 Net income (loss) 287,942 51,919 46,776 (108,220 ) 278,417 Less: net income attributable to noncontrolling interests 384 — 863 — 1,247 Net income (loss) attributable to shareholder $ 287,558 $ 51,919 $ 45,913 $ (108,220 ) $ 277,170 Average assets $ 53,115,618 $ 12,398,186 $ 13,882,551 $ 7,087,874 $ 86,484,229 Six Months Ended June 30, 2014 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income $ 918,481 $ 67,506 $ 8,256 $ (170 ) $ 994,073 Allocated provision for loan losses 74,873 9,304 — (1,659 ) 82,518 Noninterest income 348,025 93,090 47,768 (34,110 ) 454,773 Noninterest expense 859,138 71,757 7,037 126,197 1,064,129 Net income (loss) before income tax expense (benefit) 332,495 79,535 48,987 (158,818 ) 302,199 Income tax expense (benefit) 123,854 29,627 18,248 (92,032 ) 79,697 Net income (loss) 208,641 49,908 30,739 (66,786 ) 222,502 Less: net income attributable to noncontrolling interests 82 — 875 — 957 Net income (loss) attributable to shareholder $ 208,559 $ 49,908 $ 29,864 $ (66,786 ) $ 221,545 Average assets $ 48,454,875 $ 6,846,662 $ 12,537,345 $ 6,850,469 $ 74,689,351 The financial information presented was derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. This information is based on internal management accounting policies that have been developed to reflect the underlying economics of the businesses. These policies address the methodologies applied and include policies related to funds transfer pricing, cost allocations and capital allocations. Funds transfer pricing was used in the determination of net interest income earned primarily on loans and deposits. The method employed for funds transfer pricing is a matched funding concept whereby lines of business which are fund providers are credited and those that are fund users are charged based on maturity, prepayment and/or repricing characteristics applied on an instrument level. Costs for centrally managed operations are generally allocated to the lines of business based on the utilization of services provided or other appropriate indicators. Capital is allocated to the lines of business based upon the underlying risks in each business taking into account economic and regulatory capital standards. The development and application of these methodologies is a dynamic process. Accordingly, prior period financials have been revised to reflect management accounting enhancements and changes in the Company's organizational structure. The 2014 segment information has been revised to conform to the 2015 presentation. In addition, unlike financial accounting, there is no authoritative literature for management accounting similar to U.S. GAAP. Consequently, reported results are not necessarily comparable to those presented by other financial institutions.

Related Party Transactions

Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company enters into various contracts with BBVA that affect the Company’s business and operations. The following discloses the significant transactions between the Company and BBVA during 2015 and 2014 . The Company believes all of the transactions entered into between the Company and BBVA were transacted on terms that were no more or less beneficial to the Company than similar transactions entered into with unrelated market participants, including interest rates and transaction costs. The Company foresees executing similar transactions with BBVA in the future. Derivatives The Company has entered into various derivative contracts as noted below with BBVA as the upstream counterparty. The net fair value of outstanding derivative contracts between the Company and BBVA are detailed below. June 30, 2015 December 31, 2014 (In Thousands) Derivative contracts: Cash flow hedges $ 595 $ 1,693 Free-standing derivatives not designated as hedging instruments (7,385 ) 9,512 Securities Purchased Under Agreements to Resell/ Securities Sold Under Agreements to Repurchase The Company enters into agreements with BBVA as the counterparty under which it purchases/sells securities subject to an obligation to resell/repurchase the same or similar securities. The following represents the amount of securities purchased under agreement to resell and securities sold under agreement to repurchase where BBVA is the counterparty. June 30, 2015 December 31, 2014 (In Thousands) Securities purchased under agreements to resell $ 2,554 $ 97,970 Securities sold under agreements to repurchase — 435,684 Borrowings BSI, a wholly owned subsidiary of the Company, has a $420 million revolving note and cash subordination agreement with BBVA that was executed on March 16, 2012 with a maturity date of March 16, 2018. BSI also has a $150 million line of credit with BBVA that was initiated on August 1, 2014. At June 30, 2015 there was $150 million outstanding on the line of credit agreement and no amount outstanding under the revolving note and cash subordination agreement. At December 31, 2014 there were no amounts outstanding under either of these agreements.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2015
Accounting Policies [Abstract]
Use of estimates	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period, the most significant of which relate to the allowance for loan losses, goodwill impairment, fair value measurements and income taxes. Actual results could differ from those estimates.
Recently issued accounting standards	Recently Issued Accounting Standards Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure In January 2014 , the FASB released ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure . The amendments in this ASU clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 . The Company elected to adopt the amendments in this ASU using the prospective transition method. The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. See Note 3 , Loans and Allowance for Loan Losses . Revenue from Contracts with Customers In May 2014 , the FASB released ASU 2014-09, Revenue from Contracts with Customers . The core principle of this codified guidance requires an entity to recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides five steps to be analyzed to accomplish the core principle. The amendments in this ASU were originally effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016 . Subsequently, the FASB issued a one -year deferral for implementation, which results in the new guidance being effective for annual and interim reporting periods beginning after December 15, 2017. The FASB, however, permitted adoption of the new guidance on the original effective date. The Company is currently assessing the impact that the adoption of this standard will have on the financial condition and results of operations of the Company. Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures In June 2014 , the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures . The amendments in this ASU change the accounting for repurchase-to-maturity transactions to secured borrowing accounting. In addition, for repurchase financing arrangements, the amendments require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The amendments in this ASU also require disclosures on transfers accounted for as sales in transactions that are economically similar to repurchase agreements, and provide increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The accounting changes in this ASU and disclosures for certain transactions accounted for as a sale are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 . The disclosures for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014 and for interim periods beginning after March 15, 2015 . The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. See Note 6 , Securities Financing Activities . Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure In August 2014 , the FASB issued ASU 2014-14, Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure . The amendments in this ASU address the classification and measurement of foreclosed loans which were part of a government-sponsored loan guarantee program. If certain criteria are met, the loan should be derecognized and a separate other receivable should be recorded upon foreclosure at the amount of the loan balance expected to be recovered from the guarantor. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 . The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. Consolidation In February 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis. The amendments in this ASU modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminate the presumption that a general partner should consolidate a limited partnership, affect the consolidation analysis of reporting entities that are involved with variable interest entities and provide a scope exception from consolidation guidance for reporting entities with interest in certain investment funds. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Simplifying the Presentation of Debt Issuance Costs In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs. To simplify presentation of debt issuance costs, the amendments in this ASU require 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. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Customer's Accounting for Fees Paid in a Cloud Computing Arrangement In April 2015, the FASB issued ASU 2015-05, Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. The amendments in this ASU provide guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company.
Derivatives	The Company has made an accounting policy decision to not offset derivative fair value amounts under master netting agreements.
Securities for repurchase and resale	Securities purchased under agreements to resell and securities sold under agreements to repurchase are governed by a MRA. Under the terms of the MRA, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the nondefaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted. These amounts are limited to the contract asset/liability balance, and accordingly, do not include excess collateral received or pledged. The Company offsets the assets and liabilities under netting arrangements for the balance sheet presentation of securities purchased under agreements to resell and securities sold under agreements to repurchase provided certain criteria are met that permit balance sheet netting.

Investment Securities Availab21

Investment Securities Available for Sale and Investment Securities Held to Maturity (Tables)	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Schedule of adjusted cost and approximate fair value of investment securities available for sale and investments held to maturity	The following table presents the adjusted cost and approximate fair value of investment securities available for sale and investment securities held to maturity. June 30, 2015 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 2,683,135 $ 4,308 $ 21,335 $ 2,666,108 Mortgage-backed securities 4,285,489 38,065 29,721 4,293,833 Collateralized mortgage obligations 2,470,388 17,390 5,118 2,482,660 States and political subdivisions 368,388 4,655 2,262 370,781 Other 24,078 196 33 24,241 Equity securities 554,816 45 — 554,861 Total $ 10,386,294 $ 64,659 $ 58,469 $ 10,392,484 Investment securities held to maturity: Collateralized mortgage obligations $ 114,433 $ 6,421 $ 4,918 $ 115,936 Asset-backed securities 31,378 3,111 2,143 32,346 States and political subdivisions 1,163,159 513 97,754 1,065,918 Other 66,105 3,226 2,193 67,138 Total $ 1,375,075 $ 13,271 $ 107,008 $ 1,281,338 December 31, 2014 Gross Unrealized Amortized Cost Gains Losses Fair Value (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 2,312,572 $ 10,360 $ 9,390 $ 2,313,542 Mortgage-backed securities 4,399,706 64,371 40,242 4,423,835 Collateralized mortgage obligations 2,475,115 19,385 5,921 2,488,579 States and political subdivisions 460,569 8,008 1,262 467,315 Other 44,225 238 22 44,441 Equity securities 499,522 41 — 499,563 Total $ 10,191,709 $ 102,403 $ 56,837 $ 10,237,275 Investment securities held to maturity: Collateralized mortgage obligations $ 124,051 $ 5,878 $ 5,452 $ 124,477 Asset-backed securities 39,187 3,568 2,011 40,744 States and political subdivisions 1,112,415 2,143 79,246 1,035,312 Other 72,701 4,920 2,191 75,430 Total $ 1,348,354 $ 16,509 $ 88,900 $ 1,275,963
Schedule of fair value and gross unrealized losses of available for sale and held to maturity securities that were in a loss position	The following table discloses the fair value and the gross unrealized losses of the Company’s available for sale securities and held to maturity securities that were in a loss position at June 30, 2015 and December 31, 2014 . This information is aggregated by investment category and the length of time the individual securities have been in an unrealized loss position. June 30, 2015 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 1,780,766 $ 18,177 $ 190,089 $ 3,158 $ 1,970,855 $ 21,335 Mortgage-backed securities 1,188,411 4,667 1,600,190 25,054 2,788,601 29,721 Collateralized mortgage obligations 830,323 3,872 64,471 1,246 894,794 5,118 States and political subdivisions 171,308 2,262 — — 171,308 2,262 Other — — 1,089 33 1,089 33 Total $ 3,970,808 $ 28,978 $ 1,855,839 $ 29,491 $ 5,826,647 $ 58,469 Investment securities held to maturity: Collateralized mortgage obligations $ 17,802 $ 277 $ 44,273 $ 4,641 $ 62,075 $ 4,918 Asset-backed securities 1,372 3 19,264 2,140 20,636 2,143 States and political subdivisions 121,034 8,424 784,042 89,330 905,076 97,754 Other 3,925 2,193 — — 3,925 2,193 Total $ 144,133 $ 10,897 $ 847,579 $ 96,111 $ 991,712 $ 107,008 December 31, 2014 Securities in a loss position for less than 12 months Securities in a loss position for 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In Thousands) Investment securities available for sale: Debt securities: U.S. Treasury and other U.S. government agencies $ 620,794 $ 8,220 $ 37,220 $ 1,170 $ 658,014 $ 9,390 Mortgage-backed securities 308,734 862 1,915,494 39,380 2,224,228 40,242 Collateralized mortgage obligations 714,173 3,829 146,806 2,092 860,979 5,921 States and political subdivisions — — 135,825 1,262 135,825 1,262 Other — — 1,099 22 1,099 22 Total $ 1,643,701 $ 12,911 $ 2,236,444 $ 43,926 $ 3,880,145 $ 56,837 Investment securities held to maturity: Collateralized mortgage obligations $ 34,400 $ 1,099 $ 27,389 $ 4,353 $ 61,789 $ 5,452 Asset-backed securities — — 23,374 2,011 23,374 2,011 States and political subdivisions 21,688 768 817,570 78,478 839,258 79,246 Other 4,061 2,191 — — 4,061 2,191 Total $ 60,149 $ 4,058 $ 868,333 $ 84,842 $ 928,482 $ 88,900
Schedule of activity related to credit losses for debt securities where other than temporary impairments was recognized in other comprehensive income	The following table discloses activity related to credit losses for debt securities where a portion of the OTTI was recognized in other comprehensive income. Three Months Ended Six Months Ended 2015 2014 2015 2014 (In Thousands) Balance at beginning of period $ 21,408 $ 21,089 $ 21,123 $ 20,943 Reductions for securities paid off during the period (realized) — — — — Additions for the credit component on debt securities in which OTTI was not previously recognized 1,013 — 1,013 — Additions for the credit component on debt securities in which OTTI was previously recognized — 34 285 180 Balance at end of period $ 22,421 $ 21,123 $ 22,421 $ 21,123
Schedule of investments classified by contractual maturity date	The maturities of the securities portfolios are presented in the following table. June 30, 2015 Amortized Cost Fair Value (In Thousands) Investment securities available for sale: Maturing within one year $ 16,274 $ 16,448 Maturing after one but within five years 204,577 204,016 Maturing after five but within ten years 1,532,790 1,528,771 Maturing after ten years 1,321,960 1,311,895 3,075,601 3,061,130 Mortgage-backed securities and collateralized mortgage obligations 6,755,877 6,776,493 Equity securities 554,816 554,861 Total $ 10,386,294 $ 10,392,484 Investment securities held to maturity: Maturing within one year $ 2,103 $ 2,108 Maturing after one but within five years 303,442 287,795 Maturing after five but within ten years 199,881 191,931 Maturing after ten years 755,216 683,568 1,260,642 1,165,402 Collateralized mortgage obligations 114,433 115,936 Total $ 1,375,075 $ 1,281,338
Schedule of realized gain (loss) on investments	The gross realized gains and losses recognized on sales of investment securities available for sale are shown in the table below. Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 (In Thousands) Gross gains $ 27,399 $ 21,464 $ 60,231 $ 37,898 Gross losses — — — — Net realized gains $ 27,399 $ 21,464 $ 60,231 $ 37,898

Loans and Allowance for Loan 22

Loans and Allowance for Loan Losses (Tables)	6 Months Ended
Loans and Allowance for Loan Losses (Tables)	Jun. 30, 2015
Receivables [Abstract]
Schedule of composition of loan portfolio	The following table presents the composition of the loan portfolio. June 30, 2015 December 31, 2014 (In Thousands) Commercial loans: Commercial, financial and agricultural $ 24,953,188 $ 23,828,537 Real estate – construction 2,436,831 2,154,652 Commercial real estate – mortgage 10,325,680 9,877,206 Total commercial loans 37,715,699 35,860,395 Consumer loans: Residential real estate – mortgage 14,203,543 13,922,656 Equity lines of credit 2,352,700 2,304,784 Equity loans 639,126 634,968 Credit card 592,369 630,456 Consumer direct 780,368 652,927 Consumer indirect 3,249,579 2,870,408 Total consumer loans 21,817,685 21,016,199 Covered loans 473,842 495,190 Total loans $ 60,007,226 $ 57,371,784
Schedule of purchased impaired loans	The following table presents the unpaid principal balance, discount, allowance for loan losses and carrying value of the Purchased Impaired Loans. June 30, 2015 December 31, 2014 (In Thousands) Unpaid principal balance $ 352,847 $ 378,913 Discount (8,197 ) (17,341 ) Allowance for loan losses (1,786 ) (2,066 ) Carrying value $ 342,864 $ 359,506
Schedule of accretable yield on purchased impaired loans	An analysis of the accretable yield related to the Purchased Impaired Loans follows. Six Months Ended June 30, 2015 2014 (In Thousands) Balance at beginning of period $ 68,785 $ 105,698 Transfer to (from) nonaccretable difference (10,071 ) 6,633 Accretion (14,850 ) (29,405 ) Other — — Balance at end of period $ 43,864 $ 82,926
Schedule of purchased nonimpaired loans	The following table presents the unpaid principal balance, discount, allowance for loan losses, and carrying value of the Purchased Nonimpaired Loans. June 30, 2015 December 31, 2014 (In Thousands) Unpaid principal balance $ 264,142 $ 294,202 Discount (45,630 ) (88,962 ) Allowance for loan losses (291 ) (2,283 ) Carrying value $ 218,221 $ 202,957
Schedule of FDIC indemnification asset (liability)	A summary of the activity in the FDIC indemnification asset (liability) is presented in the following table. Six Months Ended June 30, 2015 2014 (In Thousands) Balance at beginning of period $ (78,025 ) $ 24,315 Increase (decrease) due to credit loss provision (benefit) recorded on FDIC covered loans (1,054 ) 8,726 Amortization and accretion, net (38,411 ) (67,212 ) Payments to (reimbursements from) FDIC for covered assets (905 ) 6,611 Other (1,743 ) (3,502 ) Balance at end of period $ (120,138 ) $ (31,062 )
Disclosure of activity in allowance for loan losses during year	The following table, which excludes loans held for sale, presents a summary of the activity in the allowance for loan losses. The portion of the allowance that has not been identified by the Company as related to specific loan categories has been allocated to the individual loan categories on a pro rata basis for purposes of the table below: Commercial, Financial and Agricultural Commercial Real Estate (1) Residential Real Estate (2) Consumer (3) Covered Total Loans (In Thousands) Three months ended June 30, 2015 Allowance for loan losses: Beginning balance $ 323,397 $ 139,271 $ 144,947 $ 92,781 $ 1,468 $ 701,864 Provision (credit) for loan losses 29,351 (5,554 ) (6,442 ) 28,224 570 46,149 Loans charged off (4,926 ) (835 ) (8,191 ) (26,845 ) (153 ) (40,950 ) Loan recoveries 3,057 2,270 3,681 5,399 1 14,408 Net (charge-offs) recoveries (1,869 ) 1,435 (4,510 ) (21,446 ) (152 ) (26,542 ) Ending balance $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Three months ended June 30, 2014 Allowance for loan losses: Beginning balance $ 299,879 $ 153,130 $ 155,234 $ 91,357 $ 8,065 $ 707,665 Provision (credit) for loan losses 29,495 (5,057 ) 8,039 12,969 (194 ) 45,252 Loans charged off (15,517 ) (7,305 ) (13,861 ) (20,669 ) (791 ) (58,143 ) Loan recoveries 3,933 2,173 4,282 5,127 4,471 19,986 Net (charge-offs) recoveries (11,584 ) (5,132 ) (9,579 ) (15,542 ) 3,680 (38,157 ) Ending balance $ 317,790 $ 142,941 $ 153,694 $ 88,784 $ 11,551 $ 714,760 Six Months Ended June 30, 2015 Allowance for loan losses: Beginning balance $ 299,482 $ 138,233 $ 154,627 $ 89,891 $ 2,808 $ 685,041 Provision (credit) for loan losses 57,703 (5,739 ) (12,881 ) 48,994 103 88,180 Loans charged off (11,545 ) (1,470 ) (14,945 ) (51,390 ) (1,026 ) (80,376 ) Loan recoveries 5,239 4,128 7,194 12,064 1 28,626 Net (charge-offs) recoveries (6,306 ) 2,658 (7,751 ) (39,326 ) (1,025 ) (51,750 ) Ending balance $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Six Months Ended June 30, 2014 Allowance for loan losses: Beginning balance $ 292,327 $ 158,960 $ 155,575 $ 90,903 $ 2,954 $ 700,719 Provision (credit) for loan losses 36,996 (9,779 ) 20,712 29,798 4,791 82,518 Loans charged off (20,451 ) (9,951 ) (29,569 ) (42,373 ) (1,007 ) (103,351 ) Loan recoveries 8,918 3,711 6,976 10,456 4,813 34,874 Net (charge-offs) recoveries (11,533 ) (6,240 ) (22,593 ) (31,917 ) 3,806 (68,477 ) Ending balance $ 317,790 $ 142,941 $ 153,694 $ 88,784 $ 11,551 $ 714,760 (1) Includes commercial real estate – mortgage and real estate – construction loans. (2) Includes residential real estate – mortgage, equity lines of credit and equity loans. (3) Includes credit card, consumer direct and consumer indirect loans. The table below provides a summary of the allowance for loan losses and related loan balances by portfolio. Commercial, Financial and Agricultural Commercial Real Estate (1) Residential Real Estate (2) Consumer (3) Covered Total Loans (In Thousands) June 30, 2015 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 27,131 $ 5,026 $ 36,798 $ 1,613 $ — $ 70,568 Collectively evaluated for impairment 323,557 130,126 97,197 97,946 — 648,826 Purchased impaired — — — — 1,786 1,786 Purchased nonimpaired 191 — — — 100 291 Total allowance for loan losses $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Ending balance of loans: Individually evaluated for impairment $ 134,412 $ 86,108 $ 185,089 $ 1,830 $ — $ 407,439 Collectively evaluated for impairment 24,781,003 12,631,422 17,009,236 4,614,964 — 59,036,625 Purchased impaired — — — — 344,650 344,650 Purchased nonimpaired 37,773 44,981 1,044 5,522 129,192 218,512 Total loans $ 24,953,188 $ 12,762,511 $ 17,195,369 $ 4,622,316 $ 473,842 $ 60,007,226 December 31, 2014 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 11,158 $ 8,466 $ 42,277 $ 1,532 $ — $ 63,433 Collectively evaluated for impairment 287,105 129,767 112,350 88,037 — 617,259 Purchased impaired — — — — 2,066 2,066 Purchased nonimpaired 1,219 — — 322 742 2,283 Total allowance for loan losses $ 299,482 $ 138,233 $ 154,627 $ 89,891 $ 2,808 $ 685,041 Ending balance of loans: Individually evaluated for impairment $ 48,173 $ 105,608 $ 195,462 $ 1,827 $ — $ 351,070 Collectively evaluated for impairment 23,745,149 11,896,943 16,665,930 4,145,880 — 56,453,902 Purchased impaired — — — — 361,572 361,572 Purchased nonimpaired 35,215 29,307 1,016 6,084 133,618 205,240 Total loans $ 23,828,537 $ 12,031,858 $ 16,862,408 $ 4,153,791 $ 495,190 $ 57,371,784 (1) Includes commercial real estate – mortgage and real estate – construction loans. (2) Includes residential real estate – mortgage, equity lines of credit and equity loans. (3) Includes credit card, consumer direct and consumer indirect loans.
Schedule of impaired financing receivables	The following table presents information on individually evaluated impaired loans, by loan class. June 30, 2015 Individually Evaluated Impaired Loans With No Recorded Allowance Individually Evaluated Impaired Loans With a Recorded Allowance Recorded Investment Unpaid Principal Balance Allowance Recorded Investment Unpaid Principal Balance Allowance (In Thousands) Commercial, financial and agricultural $ 7,751 $ 15,140 $ — $ 126,661 $ 131,299 $ 27,131 Real estate – construction 3,492 4,006 — 2,526 2,571 835 Commercial real estate – mortgage 22,249 23,330 — 57,841 62,294 4,191 Residential real estate – mortgage 6,772 6,772 — 102,577 102,577 6,523 Equity lines of credit — — — 26,659 27,071 23,103 Equity loans — — — 49,081 49,593 7,172 Credit card — — — — — — Consumer direct — — — 196 196 196 Consumer indirect — — — 1,634 1,634 1,417 Total loans $ 40,264 $ 49,248 $ — $ 367,175 $ 377,235 $ 70,568 December 31, 2014 Individually Evaluated Impaired Loans With No Recorded Allowance Individually Evaluated Impaired Loans With a Recorded Allowance Recorded Investment Unpaid Principal Balance Allowance Recorded Investment Unpaid Principal Balance Allowance (In Thousands) Commercial, financial and agricultural $ — $ — $ — $ 48,173 $ 61,552 $ 11,158 Real estate – construction 3,492 4,006 — 2,686 2,731 872 Commercial real estate – mortgage 22,822 23,781 — 76,608 82,005 7,594 Residential real estate – mortgage 8,795 8,795 — 107,223 107,306 9,236 Equity lines of credit — — — 25,743 26,124 23,394 Equity loans — — — 53,701 54,038 9,647 Credit card — — — — — — Consumer direct — — — 337 337 42 Consumer indirect — — — 1,490 1,490 1,490 Total loans $ 35,109 $ 36,582 $ — $ 315,961 $ 335,583 $ 63,433 The following table presents information on individually evaluated impaired loans, by loan class. Three Months Ended June 30, 2015 Three Months Ended June 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 95,797 $ 366 $ 88,271 $ 543 Real estate – construction 6,036 37 9,088 56 Commercial real estate – mortgage 82,055 537 117,404 835 Residential real estate – mortgage 110,514 694 112,862 725 Equity lines of credit 26,830 276 23,511 255 Equity loans 50,023 401 55,399 429 Credit card — — — — Consumer direct 981 2 140 1 Consumer indirect 1,642 — 1,309 1 Total loans $ 373,878 $ 2,313 $ 407,984 $ 2,845 Six Months Ended June 30, 2015 Six Months Ended June 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 80,339 $ 705 $ 107,546 $ 788 Real estate – construction 6,076 76 9,604 119 Commercial real estate – mortgage 85,117 1,117 129,376 1,777 Residential real estate – mortgage 112,220 1,389 113,913 1,444 Equity lines of credit 26,744 559 23,457 505 Equity loans 51,229 805 55,213 854 Credit card — — — — Consumer direct 831 8 149 2 Consumer indirect 1,593 — 1,287 2 Total loans $ 364,149 $ 4,659 $ 440,545 $ 5,491
Schedule of credit quality indicators associated with the Company's loans	The following tables, which exclude loans held for sale and covered loans, illustrate the credit quality indicators associated with the Company’s loans, by loan class. Commercial June 30, 2015 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Noncovered loans: Pass $ 24,328,227 $ 2,406,917 $ 9,962,971 Special Mention 339,112 17,077 231,340 Substandard 227,651 12,816 119,394 Doubtful 58,198 21 11,975 $ 24,953,188 $ 2,436,831 $ 10,325,680 December 31, 2014 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Noncovered loans: Pass $ 23,380,541 $ 2,098,994 $ 9,514,917 Special Mention 280,934 42,176 210,337 Substandard 128,251 13,458 129,435 Doubtful 38,811 24 22,517 $ 23,828,537 $ 2,154,652 $ 9,877,206 Consumer June 30, 2015 Residential Real Estate – Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 14,094,899 $ 2,316,428 $ 621,470 $ 584,697 $ 777,339 $ 3,241,916 Nonperforming 108,644 36,272 17,656 7,672 3,029 7,663 $ 14,203,543 $ 2,352,700 $ 639,126 $ 592,369 $ 780,368 $ 3,249,579 December 31, 2014 Residential Real Estate -Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 13,810,857 $ 2,269,231 $ 614,064 $ 621,015 $ 649,832 $ 2,865,013 Nonperforming 111,799 35,553 20,904 9,441 3,095 5,395 $ 13,922,656 $ 2,304,784 $ 634,968 $ 630,456 $ 652,927 $ 2,870,408
Schedule of past due loans	The following tables present an aging analysis of the Company’s past due loans, excluding loans classified as held for sale. June 30, 2015 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due and Impaired Not Past Due or Impaired Total (In Thousands) Commercial, financial and agricultural $ 18,524 $ 7,037 $ 3,149 $ 147,051 $ 9,693 $ 185,454 $ 24,767,734 $ 24,953,188 Real estate – construction 148 512 1,157 7,777 2,212 11,806 2,425,025 2,436,831 Commercial real estate – mortgage 7,916 1,348 2,853 78,569 34,389 125,075 10,200,605 10,325,680 Residential real estate – mortgage 45,487 14,926 1,703 106,179 71,357 239,652 13,963,891 14,203,543 Equity lines of credit 7,833 4,370 2,515 33,757 — 48,475 2,304,225 2,352,700 Equity loans 5,202 1,553 1,147 16,175 38,998 63,075 576,051 639,126 Credit card 4,840 3,361 7,672 — — 15,873 576,496 592,369 Consumer direct 7,247 2,190 2,176 853 167 12,633 767,735 780,368 Consumer indirect 47,676 8,895 2,810 4,853 — 64,234 3,185,345 3,249,579 Covered loans 5,930 3,640 44,528 136 — 54,234 419,608 473,842 Total loans $ 150,803 $ 47,832 $ 69,710 $ 395,350 $ 156,816 $ 820,511 $ 59,186,715 $ 60,007,226 December 31, 2014 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Accruing TDRs Total Past Due and Impaired Not Past Due or Impaired Total (In Thousands) Commercial, financial and agricultural $ 10,829 $ 5,765 $ 1,610 $ 61,157 $ 10,127 $ 89,488 $ 23,739,049 $ 23,828,537 Real estate – construction 1,954 994 477 7,964 2,112 13,501 2,141,151 2,154,652 Commercial real estate – mortgage 9,813 4,808 628 89,736 39,841 144,826 9,732,380 9,877,206 Residential real estate – mortgage 45,279 16,510 2,598 108,357 69,408 242,152 13,680,504 13,922,656 Equity lines of credit 9,929 4,395 2,679 32,874 — 49,877 2,254,907 2,304,784 Equity loans 6,357 3,268 997 19,029 41,197 70,848 564,120 634,968 Credit card 5,692 3,921 9,441 — — 19,054 611,402 630,456 Consumer direct 9,542 1,826 2,296 799 298 14,761 638,166 652,927 Consumer indirect 35,366 7,935 2,771 2,624 — 48,696 2,821,712 2,870,408 Covered loans 6,678 4,618 47,957 114 — 59,367 435,823 495,190 Total loans $ 141,439 $ 54,040 $ 71,454 $ 322,654 $ 162,983 $ 752,570 $ 56,619,214 $ 57,371,784
Schedule of troubled debt restructuring loans	The following table presents an analysis of the types of loans that were restructured and classified as TDRs, excluding loans classified as held for sale. Three Months Ended June 30, 2015 Three Months Ended June 30, 2014 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 2 $ 236 2 $ 163 Real estate – construction — — — — Commercial real estate – mortgage 1 226 3 2,656 Residential real estate – mortgage 11 2,505 46 4,124 Equity lines of credit 28 1,351 48 2,178 Equity loans 6 778 23 1,330 Credit card — — — — Consumer direct 17 302 — — Consumer indirect — — 32 470 Covered loans 1 16 — — Six Months Ended June 30, 2015 Six Months Ended June 30, 2014 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 3 $ 311 2 $ 163 Real estate – construction — — — — Commercial real estate – mortgage 1 226 9 6,586 Residential real estate – mortgage 22 4,245 56 5,118 Equity lines of credit 59 3,264 97 4,480 Equity loans 20 1,496 41 3,317 Credit card — — — — Consumer direct 17 302 — — Consumer indirect 22 379 50 672 Covered loans 2 21 — — The following table provides a breakout of TDRs, including nonaccrual loans and covered loans and excluding loans classified as held for sale. June 30, 2015 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due and Nonaccrual Not Past Due or Nonaccrual Total (In Thousands) Commercial, financial and agricultural $ 33 $ — $ 128 $ 1,400 $ 1,561 $ 9,532 $ 11,093 Real estate – construction — — — 516 516 2,212 2,728 Commercial real estate – mortgage — — — 4,475 4,475 34,389 38,864 Residential real estate – mortgage 3,958 311 762 27,664 32,695 66,326 99,021 Equity lines of credit — — — 25,490 25,490 — 25,490 Equity loans 2,540 491 334 10,083 13,448 35,633 49,081 Credit card — — — — — — — Consumer direct — — — 29 29 167 196 Consumer indirect — — — 1,634 1,634 — 1,634 Covered loans — — — 16 16 — 16 Total loans $ 6,531 $ 802 $ 1,224 $ 71,307 $ 79,864 $ 148,259 $ 228,123 December 31, 2014 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due and Nonaccrual Not Past Due or Nonaccrual Total (In Thousands) Commercial, financial and agricultural $ 11 $ — $ — $ 2,052 $ 2,063 $ 10,116 $ 12,179 Real estate – construction — — — 200 200 2,112 2,312 Commercial real estate – mortgage 371 536 — 7,068 7,975 38,934 46,909 Residential real estate – mortgage 2,440 2,688 844 32,518 38,490 63,436 101,926 Equity lines of credit — — — 24,519 24,519 — 24,519 Equity loans 2,182 1,124 878 12,504 16,688 37,013 53,701 Credit card — — — — — — — Consumer direct 105 — — 40 145 193 338 Consumer indirect — — — 1,490 1,490 — 1,490 Covered loans — — — 17 17 — 17 Total loans $ 5,109 $ 4,348 $ 1,722 $ 80,408 $ 91,587 $ 151,804 $ 243,391
Schedule of subsequent default on restructured loans	The following tables provide a summary of initial subsequent defaults that occurred within one year of the restructure date. The table excludes loans classified as held for sale as of period-end and includes loans no longer in default as of period-end. Three Months Ended June 30, 2015 Three Months Ended June 30, 2014 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction 1 377 — — Commercial real estate – mortgage — — 1 2,198 Residential real estate – mortgage 1 96 — — Equity lines of credit — — — — Equity loans — — 3 319 Credit card — — — — Consumer direct — — — — Consumer indirect — — — — Covered loans 1 6 — — Six Months Ended June 30, 2015 Six Months Ended June 30, 2014 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction 1 377 — — Commercial real estate – mortgage 1 178 1 2,198 Residential real estate – mortgage 5 743 — — Equity lines of credit — — 3 275 Equity loans 2 161 4 382 Credit card — — — — Consumer direct — — — — Consumer indirect 1 18 — — Covered loans 1 6 — —

Loan Sales and Servicing (Table

Loan Sales and Servicing (Tables)	6 Months Ended
Loan Sales and Servicing (Tables)	Jun. 30, 2015
Transfers and Servicing [Abstract]
Schedule of residential real estate mortgage servicing rights	The following table is an analysis of the activity in the Company’s MSRs. Three Months Ended Six Months Ended 2015 2014 2015 2014 (In Thousands) Carrying value, at beginning of period $ 35,213 $ 31,828 $ 35,488 $ 30,065 Additions 3,963 1,923 6,722 4,006 Increase (decrease) in fair value: Due to changes in valuation inputs or assumptions 2,446 (2,085 ) (146 ) (1,794 ) Due to other changes in fair value (1) (751 ) (562 ) (1,193 ) (1,173 ) Carrying value, at end of period $ 40,871 $ 31,104 $ 40,871 $ 31,104 (1) Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time.
Schedule of sensitivity of current fair value of residential real estate mortgage servicing rights	At June 30, 2015 and December 31, 2014 , the sensitivity of the current fair value of the residential MSRs to immediate 10% and 20% adverse changes in key economic assumptions are included in the following table: June 30, 2015 December 31, 2014 (Dollars in Thousands) Fair value of MSRs $ 40,871 $ 35,488 Composition of residential loans serviced for others: Fixed rate mortgage loans 96.3 % 96.1 % Adjustable rate mortgage loans 3.7 3.9 Total 100.0 % 100.0 % Weighted average life (in years) 6.2 6.2 Prepayment speed: 10.8 % 10.6 % Effect on fair value of a 10% increase $ (1,494 ) $ (1,220 ) Effect on fair value of a 20% increase (2,881 ) (2,375 ) Weighted average discount rate: 10.1 % 10.1 % Effect on fair value of a 10% increase $ (1,430 ) $ (1,291 ) Effect on fair value of a 20% increase (2,760 ) (2,492 )

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	6 Months Ended
Derivatives and Hedging (Tables)	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table reflects the notional amount and fair value of derivative instruments included on the Company’s Unaudited Condensed Consolidated Balance Sheets on a gross basis. June 30, 2015 December 31, 2014 Fair Value Fair Value Notional Amount Derivative Assets (1) Derivative Liabilities (2) Notional Amount Derivative Assets (1) Derivative Liabilities (2) (In Thousands) Derivatives designated as hedging instruments: Fair value hedges: Interest rate swaps related to long-term debt $ 2,123,950 $ 67,754 $ 28,088 $ 1,423,950 $ 69,700 $ — Total fair value hedges 67,754 28,088 69,700 — Cash flow hedges: Interest rate contracts: Swaps related to commercial loans 2,100,000 4,778 85 1,100,000 1,793 1,023 Swaps related to FHLB advances 320,000 — 11,968 320,000 — 13,474 Total cash flow hedges 4,778 12,053 1,793 14,497 Total derivatives designated as hedging instruments $ 72,532 $ 40,141 $ 71,493 $ 14,497 Free-standing derivatives not designated as hedging instruments: Interest rate contracts: Forward and option contracts related to held for sale mortgages $ 905,500 $ 2,956 $ 518 $ 189,000 $ 18 $ 1,576 Equity contracts: Purchased equity option related to equity-linked CDs 867,419 62,453 — 821,849 76,487 — Swap associated with sale of Visa, Inc. Class B shares 58,791 — 1,470 57,393 — 1,435 Foreign exchange contracts: Forwards related to commercial loans 577,470 2,336 3,819 602,066 5,529 612 Spots related to commercial loans 65,347 107 69 74,940 41 80 Futures contracts (3) 447,000 — — 342,000 — — Interest rate lock commitments 235,237 3,482 25 180,822 2,319 1 Written equity option related to equity-linked CDs 831,221 — 60,259 795,467 — 74,319 Trading account assets and liabilities: Interest rate contracts for customers 22,343,465 300,286 234,601 18,678,390 296,239 236,763 Commodity contracts for customers 191,683 15,775 15,689 264,491 25,569 25,448 Foreign exchange contracts for customers 427,958 8,501 7,887 425,123 8,268 7,527 Total trading account assets and liabilities 324,562 258,177 330,076 269,738 Total free-standing derivative instruments not designated as hedging instruments $ 395,896 $ 324,337 $ 414,470 $ 347,761 (1) Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets. (2) Derivative liabilities are recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets . (3) Changes in fair value are cash settled daily; therefore, there is no ending balance at any given reporting period.
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table reflects the change in fair value for interest rate contracts and the related hedged items as well as other gains and losses related to fair value hedges including gains and losses recognized because of hedge ineffectiveness. Gain (Loss) for the Condensed Consolidated Three Months Ended June 30, Six Months Ended June 30, Statements of Income Caption 2015 2014 2015 2014 (In Thousands) Change in fair value of interest rate contracts: Interest rate swaps hedging long term debt Interest on FHLB and other borrowings $ (40,151 ) $ 811 $ (30,033 ) $ (124 ) Hedged long term debt Interest on FHLB and other borrowings 35,536 (838 ) 26,123 219 Other gains on interest rate contracts: Interest and amortization related to interest rate swaps on hedged long term debt Interest on FHLB and other borrowings 12,178 6,016 21,744 12,032
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table presents the effect of derivative instruments designated and qualifying as cash flow hedges on the Company’s Unaudited Condensed Consolidated Balance Sheets and the Company’s Unaudited Condensed Consolidated Statements of Income. Gain (Loss) for the Three Months Ended Six Months Ended 2015 2014 2015 2014 (In Thousands) Interest rate contracts: Net change in amount recognized in other comprehensive income $ 1,013 $ (875 ) $ 3,072 $ (1,682 ) Amount reclassified from accumulated other comprehensive income into net interest income 1,807 (564 ) 2,854 (1,727 ) Amount of ineffectiveness recognized in net interest income — — — —
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position	The net gains and losses recorded in the Company's Unaudited Condensed Consolidated Statements of Income from free-standing derivative instruments not designated as hedging instruments are summarized in the following table. Gain (Loss) for the Condensed Consolidated Three Months Ended June 30, Six Months Ended June 30, Statements of Income Caption 2015 2014 2015 2014 (In Thousands) Futures contracts Mortgage banking income and corporate and correspondent investment sales 2 (157 ) 49 (233 ) Option contracts related to mortgage servicing rights Mortgage banking income — 41 (195 ) 41 Interest rate contracts: Forward and option contracts related to residential mortgage loans held for sale Mortgage banking income 4,396 (2,594 ) 3,996 (4,148 ) Interest rate lock commitments Mortgage banking income (1,530 ) 2,139 1,139 2,931 Interest rate contracts for customers Corporate and correspondent investment sales 11,890 4,040 16,529 9,158 Commodity contracts: Commodity contracts for customers Corporate and correspondent investment sales (5 ) (105 ) 9 (97 ) Equity contracts: Purchased equity option related to equity-linked CDs Other expense (7,747 ) 2,929 (14,035 ) 6,707 Written equity option related to equity-linked CDs Other expense 7,700 (2,865 ) 14,060 (6,544 ) Foreign currency contracts: Forward contracts related to commercial loans Other income (23,483 ) (11,943 ) 23,084 (17,430 ) Spot contracts related to commercial loans Other income 3,375 2,527 (3,520 ) 3,407 Foreign currency exchange contracts for customers Corporate and correspondent investment sales 481 177 861 370
Schedule of assets and liabilities subject to enforceable master netting arrangements	The following represents the Company’s total gross derivative instrument assets and liabilities subject to an enforceable master netting arrangement. The derivative instruments the Company has with its customers are not subject to an enforceable master netting arrangement. Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) June 30, 2015 Derivative financial assets: Subject to a master netting arrangement $ 223,166 $ — $ 223,166 $ — $ 36,739 $ 186,427 Not subject to a master netting arrangement 245,262 — 245,262 — — 245,262 Total derivative financial assets $ 468,428 $ — $ 468,428 $ — $ 36,739 $ 431,689 Derivative financial liabilities: Subject to a master netting arrangement $ 278,220 $ — $ 278,220 $ 28,835 $ 132,340 $ 117,045 Not subject to a master netting arrangement 86,258 — 86,258 — — 86,258 Total derivative financial liabilities $ 364,478 $ — $ 364,478 $ 28,835 $ 132,340 $ 203,303 December 31, 2014 Derivative financial assets: Subject to a master netting arrangement $ 225,227 $ — $ 225,227 $ — $ 58,309 $ 166,918 Not subject to a master netting arrangement 260,736 — 260,736 — — 260,736 Total derivative financial assets $ 485,963 $ — $ 485,963 $ — $ 58,309 $ 427,654 Derivative financial liabilities: Subject to a master netting arrangement $ 259,018 $ — $ 259,018 $ 29,677 $ 44,163 $ 185,178 Not subject to a master netting arrangement 103,240 — 103,240 — — 103,240 Total derivative financial liabilities $ 362,258 $ — $ 362,258 $ 29,677 $ 44,163 $ 288,418 (1) The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Securities Financing Activiti25

Securities Financing Activities (Tables)	6 Months Ended
Securities Financing Activities (Tables)	Jun. 30, 2015
Transfers and Servicing [Abstract]
Schedule of securities sold under agreements to repurchase	Securities sold under agreements to repurchase are accounted for as secured borrowings. The following table presents the Company's related activity, by collateral type and remaining contractual maturity. June 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater Than 90 days Total (In Thousands) Securities Sold Under Agreements Repurchase: U.S. Treasury and agency securities $ 3,867,485 $ 426,293 $ 453,776 $ — $ 4,747,554 Total $ 3,867,485 $ 426,293 $ 453,776 $ — $ 4,747,554
Schedule of assets and liabilities subject to enforceable master netting arrangements	The following represents the Company’s assets/liabilities subject to an enforceable master netting arrangement. Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) June 30, 2015 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 5,157,723 $ 4,695,179 $ 462,544 $ 462,544 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 4,747,554 $ 4,695,179 $ 52,375 $ 52,375 $ — $ — December 31, 2014 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 3,100,200 $ 2,533,661 $ 566,539 $ 566,539 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 2,969,345 $ 2,533,661 $ 435,684 $ 435,684 $ — $ — (1) The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Commitments, Contingencies an26

Commitments, Contingencies and Guarantees (Tables)	6 Months Ended
Commitments, Contingencies and Guarantees (Tables)	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of commitments to extend credit, standby letters of credit and commercial letters of credit	The following represents the Company’s commitments to extend credit, standby letters of credit and commercial letters of credit: June 30, 2015 December 31, 2014 (In Thousands) Commitments to extend credit $ 28,458,151 $ 28,369,666 Standby and commercial letters of credit 1,703,415 1,871,323

Fair Value of Financial Instr27

Fair Value of Financial Instruments (Tables)	6 Months Ended
Fair Value of Financial Instruments (Tables)	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of differences between aggregate fair value and aggregate unpaid principle balance	The following tables summarize the difference between the aggregate fair value and the aggregate unpaid principal balance for residential mortgage loans measured at fair value. Aggregate Fair Value Aggregate Unpaid Principal Balance Difference (In Thousands) June 30, 2015 Residential mortgage loans held for sale $ 195,616 $ 191,433 $ 4,183 December 31, 2014 Residential mortgage loans held for sale $ 154,816 $ 148,564 $ 6,252
Summary of asset and liabilities measure at fair value on a recurring basis	The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs June 30, 2015 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 4,540,788 $ 4,540,788 $ — $ — State and political subdivisions 1,332 — 1,332 — Other debt securities 9,428 — 9,428 — Interest rate contracts 300,286 — 300,286 — Commodity contracts 15,775 — 15,775 — Foreign exchange contracts 8,501 — 8,501 — Other trading assets 3,015 — 1,615 1,400 Total trading account assets 4,879,125 4,540,788 336,937 1,400 Loans held for sale 195,616 — 195,616 — Investment securities available for sale: U.S. Treasury and other U.S. government agencies 2,666,108 1,423,594 1,242,514 — Mortgage-backed securities 4,293,833 — 4,293,833 — Collateralized mortgage obligations 2,482,660 — 2,482,660 — States and political subdivisions 370,781 — 370,781 — Other debt securities 24,241 24,241 — — Equity securities (1) 300 49 — 251 Total investment securities available for sale 9,837,923 1,447,884 8,389,788 251 Derivative assets: Interest rate contracts 78,970 — 75,488 3,482 Equity contracts 62,453 — 62,453 — Foreign exchange contracts 2,443 — 2,443 — Total derivative assets 143,866 — 140,384 3,482 Other assets 40,871 — — 40,871 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 4,829,553 $ 4,829,553 $ — $ — Other debt securities 2,525 — 2,525 — Interest rate contracts 234,601 — 234,601 — Commodity contracts 15,689 — 15,689 — Foreign exchange contracts 7,887 — 7,887 — Other trading liabilities 76 — 76 — Total trading account liabilities 5,090,331 4,829,553 260,778 — Derivative liabilities: Interest rate contracts 40,684 — 40,659 25 Equity contracts 60,259 — 60,259 — Foreign exchange contracts 3,888 — 3,888 — Total derivative liabilities 104,831 — 104,806 25 (1) Excludes $555 million of FHLB and Federal Reserve stock required to be owned by the Company at June 30, 2015 . These securities are carried at par. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2014 (Level 1) (Level 2) (Level 3) (In Thousands) Recurring fair value measurements Assets: Trading account assets: U.S. Treasury and other U.S. government agencies $ 2,502,308 $ 2,502,308 $ — $ — Interest rate contracts 296,239 — 296,239 — Commodity contracts 25,569 — 25,569 — Foreign exchange contracts 8,268 — 8,268 — Other trading assets 2,013 — 423 1,590 Total trading account assets 2,834,397 2,502,308 330,499 1,590 Loans held for sale 154,816 — 154,816 — Investment securities available for sale: U.S. Treasury and other U.S. government agencies 2,313,542 1,298,040 1,015,502 — Mortgage-backed securities 4,423,835 — 4,423,835 — Collateralized mortgage obligations 2,488,579 — 2,488,579 — States and political subdivisions 467,315 — 467,315 — Other debt securities 44,441 44,441 — — Equity securities (1) 48 44 — 4 Total investment securities available for sale 9,737,760 1,342,525 8,395,231 4 Derivative assets: Interest rate contracts 73,830 — 71,511 2,319 Equity contracts 76,487 — 76,487 — Foreign exchange contracts 5,570 — 5,570 — Total derivative assets 155,887 — 153,568 2,319 Other assets 35,488 — — 35,488 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 2,545,299 $ 2,545,299 $ — $ — Interest rate contracts 236,763 — 236,763 — Commodity contracts 25,448 — 25,448 — Foreign exchange contracts 7,527 — 7,527 — Other trading liabilities 425 — 425 — Total trading account liabilities 2,815,462 2,545,299 270,163 — Derivative liabilities: Interest rate contracts 16,074 — 16,073 1 Equity contracts 74,319 — 74,319 — Foreign exchange contracts 692 — 692 — Total derivative liabilities 91,085 — 91,084 1 (1) Excludes $500 million of FHLB and Federal Reserve stock required to be owned by the Company at December 31, 2014 . These securities are carried at par.
Reconciliation of assets measured on a recurring basis using significant unobservable inputs	The following table reconciles the assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3). Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Three Months Ended June 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) Balance, April 1, 2014 $ 1,692 $ 6 $ 1,682 $ 31,828 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) 17 — 2,139 (2,647 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 1,923 Sales — — — — Settlements — — — — Balance, June 30, 2014 $ 1,709 $ 6 $ 3,821 $ 31,104 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2014 $ 17 $ — $ 2,139 $ (2,647 ) Balance, April 1, 2015 $ 1,436 $ 80 $ 4,987 $ 35,213 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (36 ) — (1,530 ) 1,695 Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 171 — — Issuances — — — 3,963 Sales — — — — Settlements — — — — Balance, June 30, 2015 $ 1,400 $ 251 $ 3,457 $ 40,871 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2015 $ (36 ) $ — $ (1,530 ) $ 1,695 (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income. Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Six Months Ended June 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) Balance, January 1, 2014 $ 1,645 $ 6 $ 890 $ 30,065 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) 64 — 2,931 (2,967 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 4,006 Sales — — — — Settlements — — — — Balance, June 30, 2014 $ 1,709 $ 6 $ 3,821 $ 31,104 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2014 $ 64 $ — $ 2,931 $ (2,967 ) Balance, January 1, 2015 $ 1,590 $ 4 $ 2,318 $ 35,488 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (190 ) — 1,139 (1,339 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 247 — — Issuances — — — 6,722 Sales — — — — Settlements — — — — Balance, June 30, 2015 $ 1,400 $ 251 $ 3,457 $ 40,871 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at June 30, 2015 $ (190 ) $ — $ 1,139 $ (1,339 ) (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income.
Schedule of carrying amounts and estimated fair values within the fair value hierarchy	The following table represents those assets that were subject to fair value adjustments during the three and six months ended June 30, 2015 and 2014 and still held as of the end of the period, and the related gains and losses from fair value adjustments on assets sold during the period as well as assets still held as of the end of the period. Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) June 30, 2015 (Level 1) (Level 2) (Level 3) Three Months Ended June 30, 2015 Six Months Ended June 30, 2015 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 15,621 $ — $ — $ 15,621 $ (1,013 ) $ (1,298 ) Impaired loans (1) 179,288 — — 179,288 (1,549 ) (4,853 ) OREO 20,188 — — 20,188 (923 ) (2,182 ) Fair Value Measurements at the End of the Reporting Period Using Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) June 30, 2014 (Level 1) (Level 2) (Level 3) Three Months Ended June 30, 2014 Six Months Ended June 30, 2014 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 3,690 $ — $ — $ 3,690 $ (34 ) $ (180 ) Impaired loans (1) 131,622 — — 131,622 (14,532 ) (18,875 ) OREO 21,113 — — 21,113 (689 ) (1,582 ) (1) Total gains (losses) represent charge-offs on impaired loans for which adjustments are based on the appraised value of the collateral.
Schedule of fair value measurement inputs	The table below presents quantitative information about the significant unobservable inputs for material assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring and nonrecurring basis. Quantitative Information about Level 3 Fair Value Measurements Fair Value at Range of Unobservable Inputs June 30, 2015 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Other trading assets $ 1,400 Discounted cash flow Default rate 8.3% Prepayment rate 5.6% - 9.9% (7.4%) Interest rate contracts 3,457 Discounted cash flow Closing ratios (pull-through) 6.9% - 98.7% (65.7%) Cap grids 0.2% - 2.5% (1.1%) Other assets - MSRs 40,871 Discounted cash flow Discount rate 10.0% - 11.0% (10.1%) Constant prepayment rate or life speed 6.1% - 51.5% (10.8%) Cost to service $64 - $766 ($67) Nonrecurring fair value measurements: Investment securities held to maturity $ 15,621 Discounted cash flow Prepayment rate 9.6% Default rate 7.5% Loss severity 61.2% Expected loss 7.9% Impaired loans 179,288 Appraised value Appraised value 0.0% - 100.0% (26.7%) OREO 20,188 Appraised value Appraised value 8.0%
Schedule of fair value by balance sheet location	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments, excluding financial instruments measured at fair value on a recurring basis, are as follows: June 30, 2015 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 3,865,421 $ 3,865,421 $ 3,865,421 $ — $ — Investment securities held to maturity 1,375,075 1,281,338 — — 1,281,338 Loans, net 59,285,755 56,569,439 — — 56,569,439 Liabilities: Deposits $ 62,499,369 $ 62,602,507 $ — $ 62,602,507 $ — FHLB and other borrowings 6,778,066 6,780,159 — 6,780,159 — Federal funds purchased and securities sold under agreements to repurchase 623,400 623,400 — 623,400 — December 31, 2014 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 3,388,405 $ 3,388,405 $ 3,388,405 $ — $ — Investment securities held to maturity 1,348,354 1,275,963 — — 1,275,963 Loans, net 56,686,743 54,551,442 — — 54,551,442 Liabilities: Deposits $ 61,189,716 $ 61,263,812 $ — $ 61,263,812 $ — FHLB and other borrowings 4,809,843 4,786,152 — 4,786,152 — Federal funds purchased and securities sold under agreements to repurchase 1,129,503 1,129,503 — 1,129,503 —

Comprehensive Income (Tables)

Comprehensive Income (Tables)	6 Months Ended
Comprehensive Income (Tables)	Jun. 30, 2015
Equity [Abstract]
Change in components of other comprehensive income (loss)	The following summarizes the change in the components of other comprehensive income (loss). Three Months Ended June 30, 2015 2014 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income (loss): Unrealized holding gains (losses) arising during period from securities available for sale $ (43,935 ) $ (19,124 ) $ (24,811 ) $ 40,454 $ 14,539 $ 25,915 Less: reclassification adjustment for net gains on sale of securities in net income 27,399 11,927 15,472 21,464 7,712 13,752 Net change in unrealized gains (losses) on securities available for sale (71,334 ) (31,051 ) (40,283 ) 18,990 6,827 12,163 Change in unamortized net holding losses on investment securities held to maturity 3,531 1,537 1,994 2,694 967 1,727 Less: non-credit related impairment on investment securities held to maturity — — — — — — Change in unamortized non-credit related impairment on investment securities held to maturity 456 198 258 369 132 237 Net change in unamortized holding losses on securities held to maturity 3,987 1,735 2,252 3,063 1,099 1,964 Unrealized holding gains (losses) arising during period from cash flow hedge instruments 1,795 782 1,013 (1,365 ) (490 ) (875 ) Change in defined benefit plans — — — — — — Other comprehensive income (loss) $ (65,552 ) $ (28,534 ) $ (37,018 ) $ 20,688 $ 7,436 $ 13,252 Six Months Ended June 30, 2015 2014 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income (loss): Unrealized holding gains arising during period from securities available for sale $ 20,855 $ 9,078 $ 11,777 $ 81,416 $ 29,261 $ 52,155 Less: reclassification adjustment for net gains on sale of securities in net income 60,231 26,219 34,012 37,898 13,620 24,278 Net change in unrealized gains (losses) on securities available for sale (39,376 ) (17,141 ) (22,235 ) 43,518 15,641 27,877 Change in unamortized net holding losses on investment securities held to maturity 6,673 2,905 3,768 7,468 2,683 4,785 Less: non-credit related impairment on investment securities held to maturity 87 38 49 235 84 151 Change in unamortized non-credit related impairment on investment securities held to maturity 732 318 414 754 271 483 Net change in unamortized holding losses on securities held to maturity 7,318 3,185 4,133 7,987 2,870 5,117 Unrealized holding gains (losses) arising during period from cash flow hedge instruments 5,441 2,369 3,072 (2,626 ) (944 ) (1,682 ) Change in defined benefit plans 2,716 1,001 1,715 (2,672 ) (1,001 ) (1,671 ) Other comprehensive income (loss) $ (23,901 ) $ (10,586 ) $ (13,315 ) $ 46,207 $ 16,566 $ 29,641
Schedule of accumulated other comprehensive income (loss)	Activity in accumulated other comprehensive income (loss), net of tax was as follows: Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity Accumulated Gains (Losses) on Cash Flow Hedging Instruments Defined Benefit Plan Adjustment Unamortized Impairment Losses on Investment Securities Held to Maturity Total (In Thousands) Balance, January 1, 2014 $ (31,490 ) $ (5,289 ) $ (41,921 ) $ (9,236 ) $ (87,936 ) Other comprehensive income (loss) before reclassifications 52,155 (2,789 ) — (151 ) 49,215 Amounts reclassified from accumulated other comprehensive income (loss) (19,493 ) 1,107 (1,671 ) 483 (19,574 ) Net current period other comprehensive income (loss) 32,662 (1,682 ) (1,671 ) 332 29,641 Balance, June 30, 2014 $ 1,172 $ (6,971 ) $ (43,592 ) $ (8,904 ) $ (58,295 ) Balance, January 1, 2015 $ 4,469 $ (7,189 ) $ (41,121 ) $ (7,516 ) $ (51,357 ) Other comprehensive income (loss) before reclassifications 11,777 4,684 — (49 ) 16,412 Amounts reclassified from accumulated other comprehensive income (loss) (30,244 ) (1,612 ) 1,715 414 (29,727 ) Net current period other comprehensive income (loss) (18,467 ) 3,072 1,715 365 (13,315 ) Balance, June 30, 2015 $ (13,998 ) $ (4,117 ) $ (39,406 ) $ (7,151 ) $ (64,672 )
Schedule of reclassifications out of accumulated other comprehensive income	The following table presents information on reclassifications out of accumulated other comprehensive income. Details About Accumulated Other Comprehensive Income Components Amounts Reclassified From Accumulated Other Comprehensive Income (1) Condensed Consolidated Statement of Income Caption Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 (In Thousands) Unrealized Gains on Securities Available for Sale and Transferred to Held to Maturity $ 27,399 $ 21,464 $ 60,231 $ 37,898 Investment securities gains, net (3,531 ) (2,694 ) (6,673 ) (7,468 ) Interest on investment securities held to maturity 23,868 18,770 53,558 30,430 (10,390 ) (6,745 ) (23,314 ) (10,937 ) Income tax expense $ 13,478 $ 12,025 $ 30,244 $ 19,493 Net of tax Accumulated Gains (Losses) on Cash Flow Hedging Instruments $ 3,526 $ 1,212 $ 6,339 $ 1,824 Interest and fees on loans (1,719 ) (1,776 ) (3,485 ) (3,551 ) Interest and fees on FHLB advances 1,807 (564 ) 2,854 (1,727 ) (786 ) 203 (1,242 ) 620 Income tax (expense) benefit $ 1,021 $ (361 ) $ 1,612 $ (1,107 ) Net of tax Defined Benefit Plan Adjustment $ — $ — $ (2,716 ) $ 2,672 (2) — — 1,001 (1,001 ) Income tax (expense) benefit $ — $ — $ (1,715 ) $ 1,671 Net of tax Unamortized Impairment Losses on Investment Securities Held to Maturity $ (456 ) $ (369 ) $ (732 ) $ (754 ) Interest on investment securities held to maturity 198 132 318 271 Income tax benefit $ (258 ) $ (237 ) $ (414 ) $ (483 ) Net of tax (1) Amounts in parentheses indicate debits to the consolidated statement of income. (2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 18, Benefit Plans, in the Notes to the December 31, 2014, Consolidated Financial Statements for additional details).

Supplemental Disclosure for S29

Supplemental Disclosure for Statement of Cash Flows (Tables)	6 Months Ended
	Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental cash flow disclosures	The following table presents the Company’s supplemental disclosures for statement of cash flows. Six Months Ended June 30, 2015 2014 (In Thousands) Supplemental disclosures of cash flow information: Interest paid $ 176,360 $ 134,941 Net income taxes paid 76,448 28,025 Supplemental schedule of noncash investing and financing activities: Transfer of loans and loans held for sale to OREO $ 9,229 $ 11,614 Change in unrealized gain (loss) on available for sale securities (39,376 ) 43,518 Issuance of restricted stock, net of cancellations 458 (1,060 ) Business combinations: Assets acquired — 117,068 Liabilities assumed — 18,329

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
Segment Information (Tables)	Jun. 30, 2015
Segment Reporting [Abstract]
Schedule of segment reporting information	The following tables present the segment information for the Company’s segments. Three Months Ended June 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 494,464 $ 39,078 $ 416 $ (41,976 ) $ 491,982 Allocated provision for loan losses 21,072 6,275 — 18,802 46,149 Noninterest income 192,596 47,213 29,336 (10,576 ) 258,569 Noninterest expense 426,040 39,103 4,930 49,563 519,636 Net income (loss) before income tax expense (benefit) 239,948 40,913 24,822 (120,917 ) 184,766 Income tax expense (benefit) 83,982 14,319 8,688 (58,873 ) 48,116 Net income (loss) 155,966 26,594 16,134 (62,044 ) 136,650 Less: net income attributable to noncontrolling interests 156 — 434 — 590 Net income (loss) attributable to shareholder $ 155,810 $ 26,594 $ 15,700 $ (62,044 ) $ 136,060 Average assets $ 53,620,135 $ 12,955,832 $ 14,188,771 $ 7,101,212 $ 87,865,950 Three Months Ended June 30, 2014 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income $ 464,614 $ 35,429 $ 3,632 $ (4,901 ) $ 498,774 Allocated provision for loan losses 38,252 8,294 — (1,294 ) 45,252 Noninterest income 173,768 45,855 25,755 (9,933 ) 235,445 Noninterest expense 429,214 40,543 3,397 72,108 545,262 Net income (loss) before income tax expense (benefit) 170,916 32,447 25,990 (85,648 ) 143,705 Income tax expense (benefit) 63,666 12,086 9,681 (49,303 ) 36,130 Net income (loss) 107,250 20,361 16,309 (36,345 ) 107,575 Less: net income attributable to noncontrolling interests 65 — 439 — 504 Net income (loss) attributable to shareholder $ 107,185 $ 20,361 $ 15,870 $ (36,345 ) $ 107,071 Average assets $ 49,120,763 $ 7,270,019 $ 12,738,181 $ 6,875,978 $ 76,004,941 Six Months Ended June 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 976,875 $ 78,963 $ 18,798 $ (73,625 ) $ 1,001,011 Allocated provision for loan losses 51,418 17,248 — 19,514 88,180 Noninterest income 368,930 96,700 63,192 (20,983 ) 507,839 Noninterest expense 851,399 78,539 10,027 102,390 1,042,355 Net income (loss) before income tax expense (benefit) 442,988 79,876 71,963 (216,512 ) 378,315 Income tax expense (benefit) 155,046 27,957 25,187 (108,292 ) 99,898 Net income (loss) 287,942 51,919 46,776 (108,220 ) 278,417 Less: net income attributable to noncontrolling interests 384 — 863 — 1,247 Net income (loss) attributable to shareholder $ 287,558 $ 51,919 $ 45,913 $ (108,220 ) $ 277,170 Average assets $ 53,115,618 $ 12,398,186 $ 13,882,551 $ 7,087,874 $ 86,484,229 Six Months Ended June 30, 2014 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income $ 918,481 $ 67,506 $ 8,256 $ (170 ) $ 994,073 Allocated provision for loan losses 74,873 9,304 — (1,659 ) 82,518 Noninterest income 348,025 93,090 47,768 (34,110 ) 454,773 Noninterest expense 859,138 71,757 7,037 126,197 1,064,129 Net income (loss) before income tax expense (benefit) 332,495 79,535 48,987 (158,818 ) 302,199 Income tax expense (benefit) 123,854 29,627 18,248 (92,032 ) 79,697 Net income (loss) 208,641 49,908 30,739 (66,786 ) 222,502 Less: net income attributable to noncontrolling interests 82 — 875 — 957 Net income (loss) attributable to shareholder $ 208,559 $ 49,908 $ 29,864 $ (66,786 ) $ 221,545 Average assets $ 48,454,875 $ 6,846,662 $ 12,537,345 $ 6,850,469 $ 74,689,351

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
Related Party Transactions (Tables)	Jun. 30, 2015
Related Party Transactions [Abstract]
Schedule of derivative contracts between the Company and BBVA	The net fair value of outstanding derivative contracts between the Company and BBVA are detailed below. June 30, 2015 December 31, 2014 (In Thousands) Derivative contracts: Cash flow hedges $ 595 $ 1,693 Free-standing derivatives not designated as hedging instruments (7,385 ) 9,512 Securities Purchased Under Agreements to Resell/ Securities Sold Under Agreements to Repurchase The Company enters into agreements with BBVA as the counterparty under which it purchases/sells securities subject to an obligation to resell/repurchase the same or similar securities. The following represents the amount of securities purchased under agreement to resell and securities sold under agreement to repurchase where BBVA is the counterparty. June 30, 2015 December 31, 2014 (In Thousands) Securities purchased under agreements to resell $ 2,554 $ 97,970 Securities sold under agreements to repurchase — 435,684

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Details)	6 Months Ended
Basis of Presentation Basis of Presentation (Details)	Jun. 30, 2015
Accounting Policies [Abstract]
Deferral period for implementation of recently issued accounting standards	1 year

Investment Securities Availab33

Investment Securities Available for Sale and Investment Securities Held to Maturity - Adjusted cost and fair value of securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 10,386,294	$ 10,191,709
Available-for-sale Securities, Gross Unrealized Gain	64,659	102,403
Available-for-sale Securities, Gross Unrealized Losses	58,469	56,837
Investment securities available for sale	10,392,484	10,237,275
Held-to-maturity Securities, Amortized Cost Basis	1,375,075	1,348,354
Held-to-maturity Securities, Gross Unrealized Gain	13,271	16,509
Held-to-maturity Securities, Gross Unrealized Losses	107,008	88,900
Investment Securities - Fair Value	1,281,338	1,275,963
US Treasury and other US Government Agencies
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,683,135	2,312,572
Available-for-sale Securities, Gross Unrealized Gain	4,308	10,360
Available-for-sale Securities, Gross Unrealized Losses	21,335	9,390
Investment securities available for sale	2,666,108	2,313,542
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,285,489	4,399,706
Available-for-sale Securities, Gross Unrealized Gain	38,065	64,371
Available-for-sale Securities, Gross Unrealized Losses	29,721	40,242
Investment securities available for sale	4,293,833	4,423,835
Collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,470,388	2,475,115
Available-for-sale Securities, Gross Unrealized Gain	17,390	19,385
Available-for-sale Securities, Gross Unrealized Losses	5,118	5,921
Investment securities available for sale	2,482,660	2,488,579
Held-to-maturity Securities, Amortized Cost Basis	114,433	124,051
Held-to-maturity Securities, Gross Unrealized Gain	6,421	5,878
Held-to-maturity Securities, Gross Unrealized Losses	4,918	5,452
Investment Securities - Fair Value	115,936	124,477
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	368,388	460,569
Available-for-sale Securities, Gross Unrealized Gain	4,655	8,008
Available-for-sale Securities, Gross Unrealized Losses	2,262	1,262
Investment securities available for sale	370,781	467,315
Held-to-maturity Securities, Amortized Cost Basis	1,163,159	1,112,415
Held-to-maturity Securities, Gross Unrealized Gain	513	2,143
Held-to-maturity Securities, Gross Unrealized Losses	97,754	79,246
Investment Securities - Fair Value	1,065,918	1,035,312
Other
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	24,078	44,225
Available-for-sale Securities, Gross Unrealized Gain	196	238
Available-for-sale Securities, Gross Unrealized Losses	33	22
Investment securities available for sale	24,241	44,441
Held-to-maturity Securities, Amortized Cost Basis	66,105	72,701
Held-to-maturity Securities, Gross Unrealized Gain	3,226	4,920
Held-to-maturity Securities, Gross Unrealized Losses	2,193	2,191
Investment Securities - Fair Value	67,138	75,430
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	554,816	499,522
Available-for-sale Securities, Gross Unrealized Gain	45	41
Available-for-sale Securities, Gross Unrealized Losses	0	0
Investment securities available for sale	554,861	499,563
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Amortized Cost Basis	31,378	39,187
Held-to-maturity Securities, Gross Unrealized Gain	3,111	3,568
Held-to-maturity Securities, Gross Unrealized Losses	2,143	2,011
Investment Securities - Fair Value	$ 32,346	$ 40,744

Investment Securities Availab34

Investment Securities Available for Sale and Investment Securities Held to Maturity - Fair value and unrealized losses of available for sale securities and held to maturity securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	$ 3,970,808	$ 1,643,701
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	28,978	12,911
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	1,855,839	2,236,444
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	29,491	43,926
Available-for-sale securities, fair value	5,826,647	3,880,145
Available-for-sale securities, unrealized losses	58,469	56,837
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	144,133	60,149
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	10,897	4,058
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	847,579	868,333
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	96,111	84,842
Held-to-maturity securities, fair value	991,712	928,482
Held-to-maturity securities unrealized losses	107,008	88,900
US Treasury and government agency
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	1,780,766	620,794
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	18,177	8,220
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	190,089	37,220
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	3,158	1,170
Available-for-sale securities, fair value	1,970,855	658,014
Available-for-sale securities, unrealized losses	21,335	9,390
Mortgage backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	1,188,411	308,734
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	4,667	862
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	1,600,190	1,915,494
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	25,054	39,380
Available-for-sale securities, fair value	2,788,601	2,224,228
Available-for-sale securities, unrealized losses	29,721	40,242
Collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	830,323	714,173
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	3,872	3,829
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	64,471	146,806
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	1,246	2,092
Available-for-sale securities, fair value	894,794	860,979
Available-for-sale securities, unrealized losses	5,118	5,921
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	17,802	34,400
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	277	1,099
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	44,273	27,389
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	4,641	4,353
Held-to-maturity securities, fair value	62,075	61,789
Held-to-maturity securities unrealized losses	4,918	5,452
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	171,308	0
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	2,262	0
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	0	135,825
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	0	1,262
Available-for-sale securities, fair value	171,308	135,825
Available-for-sale securities, unrealized losses	2,262	1,262
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	121,034	21,688
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	8,424	768
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	784,042	817,570
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	89,330	78,478
Held-to-maturity securities, fair value	905,076	839,258
Held-to-maturity securities unrealized losses	97,754	79,246
Other
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	0	0
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	0	0
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	1,089	1,099
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	33	22
Available-for-sale securities, fair value	1,089	1,099
Available-for-sale securities, unrealized losses	33	22
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	3,925	4,061
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	2,193	2,191
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	0	0
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	0	0
Held-to-maturity securities, fair value	3,925	4,061
Held-to-maturity securities unrealized losses	2,193	2,191
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	1,372	0
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	3	0
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	19,264	23,374
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	2,140	2,011
Held-to-maturity securities, fair value	20,636	23,374
Held-to-maturity securities unrealized losses	$ 2,143	$ 2,011

Investment Securities Availab35

Investment Securities Available for Sale and Investment Securities Held to Maturity - Other temporary impairments losses recognized in other comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than temporary impairment recognized in other comprehensive income, beginning of period	$ 21,408	$ 21,089	$ 21,123	$ 20,943
Reductions for securities paid off during the period (realized)	0	0	0	0
Additions for the credit component on debt securities in which OTTI was not previously recognized	1,013	0	1,013	0
Additions for the credit component on debt securities in which OTTI was previously recognized	0	34	285	180
Other than temporary impairment recognized in other comprehensive income, end of period	$ 22,421	$ 21,123	$ 22,421	$ 21,123

Investment Securities Availab36

Investment Securities Available for Sale and Investment Securities Held to Maturity - Maturities of securities portfolios (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment securities available for sale, amortized cost [Abstract]
Maturing within one year	$ 16,274
Maturing after one but within five years	204,577
Maturing after five both within ten years	1,532,790
Maturing after ten years	1,321,960
Total single date maturities	3,075,601
Mortgage-backed securities and collateralized mortgage obligations	6,755,877
Available-for-sale Securities, Amortized Cost Basis	10,386,294	$ 10,191,709
Investment securities available for sale, fair value [Abstract]
Maturing within one year	16,448
Maturing after one but within five years	204,016
Maturing after five but within ten years	1,528,771
Maturing after ten years	1,311,895
Total single date maturities	3,061,130
Mortgage-backed securities and collateralized mortgage obligations	6,776,493
Investment securities available for sale	10,392,484	10,237,275
Held-to-maturity securities, amortized cost [Abstract]
Maturing within one year	2,103
Maturing after one but within five years	303,442
Maturing after five but within ten years	199,881
Maturing after ten years	755,216
Total single date maturities	1,260,642
Collateralized mortgage obligations	114,433
Total	1,375,075	1,348,354
Held-to-maturity securities, fair value [Abstract]
Maturing within one year	2,108
Maturing after one but within five years	287,795
Maturing after five but within ten years	191,931
Maturing after ten years	683,568
Total single date maturities	1,165,402
Collateralized mortgage obligations	115,936
Total Investments Securities Held to Maturity	1,281,338	1,275,963
Equity securities
Investment securities available for sale, amortized cost [Abstract]
Available-for-sale Securities, Amortized Cost Basis	554,816	499,522
Investment securities available for sale, fair value [Abstract]
Investment securities available for sale	$ 554,861	$ 499,563

Investment Securities Availab37

Investment Securities Available for Sale and Investment Securities Held to Maturity - Gross Realized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Gross gains	$ 27,399	$ 21,464	$ 60,231	$ 37,898
Gross losses	0	0	0	0
Net realized gains	$ 27,399	$ 21,464	$ 60,231	$ 37,898

Investment Securities Availab38

Investment Securities Available for Sale and Investment Securities Held to Maturity - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Federal home loan bank and federal reserve stock carried at par value	$ 555,000		$ 555,000		$ 500,000
Securities impairment	$ 1,013	$ 34	$ 1,298	$ 180

Loans and Allowance for Loan 39

Loans and Allowance for Loan Losses - Composition of loan portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Commercial loans:
Commercial, financial and agricultural	$ 24,953,188	$ 23,828,537
Real estate – construction	2,436,831	2,154,652
Commercial real estate – mortgage	10,325,680	9,877,206
Total commercial loans	37,715,699	35,860,395
Consumer loans:
Residential real estate – mortgage	14,203,543	13,922,656
Equity lines of credit	2,352,700	2,304,784
Equity loans	639,126	634,968
Credit card	592,369	630,456
Consumer direct	780,368	652,927
Consumer indirect	3,249,579	2,870,408
Total consumer loans	21,817,685	21,016,199
Covered loans	473,842	495,190
Total loans	$ 60,007,226	$ 57,371,784

Loans and Allowance for Loan 40

Loans and Allowance for Loan Losses - Purchased Impaired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Unpaid principal balance	$ 352,847	$ 378,913
Discount	(8,197)	(17,341)
Allowance for loan losses	(1,786)	(2,066)
Carrying value	$ 342,864	$ 359,506

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses - Accretable yields on purchased impaired loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 68,785	$ 105,698
Transfer to nonaccretable difference	(10,071)	6,633
Accretion	(14,850)	(29,405)
Other	0	0
Balance, end of period	$ 43,864	$ 82,926

Loans and Allowance for Loan 42

Loans and Allowance for Loan Losses - Purchased Nonimpaired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Unpaid principal balance	$ 264,142	$ 294,202
Discount	(45,630)	(88,962)
Allowance for loan losses	(291)	(2,283)
Carrying value	$ 218,221	$ 202,957

Loans and Allowance for Loan 43

Loans and Allowance for Loan Losses - FDIC Indemnification Asset (Liability) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
FDIC Indemnification Asset [Roll Forward]
Beginning balance	$ (78,025)	$ 24,315
Increase (decrease) due to credit loss provision (benefit) recorded on FDIC covered loans	(1,054)	8,726
Amortization and accretion, net	(38,411)	(67,212)
Payments to (reimbursements from) FDIC for covered assets	(905)	6,611
Other	(1,743)	(3,502)
Ending balance	$ (120,138)	$ (31,062)

Loans and Allowance for Loan 44

Loans and Allowance for Loan Losses - Allowances for loan losses activity (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, covered, beginning of period		$ 1,468	$ 8,065	$ 2,808	$ 2,954
Allowance for loan losses, total loans, beginning of period		701,864	707,665	685,041	700,719
Provision (credit) for loan losses, covered		570	(194)	103	4,791
Provision (credit) for loan losses, total loans		46,149	45,252	88,180	82,518
Loans charged off, covered		(153)	(791)	(1,026)	(1,007)
Loans charged off, total loans		(40,950)	(58,143)	(80,376)	(103,351)
Loan recoveries, covered		1	4,471	1	4,813
Loan recoveries, total loans		14,408	19,986	28,626	34,874
Net (charge offs) recoveries, covered		(152)	3,680	(1,025)	3,806
Net (charge offs) recoveries, total loans		(26,542)	(38,157)	(51,750)	(68,477)
Allowance for loan losses, covered, end of period		1,886	11,551	1,886	11,551
Allowance for loan losses, total loans, end of period		721,471	714,760	721,471	714,760
Ending Balance of Allowance Attributable to Loans [Abstract]
Individually evaluated for impairment		70,568		70,568		$ 63,433
Collectively evaluated for impairment		648,826		648,826		617,259
Purchased impaired		1,786		1,786		2,066
Purchased nonimpaired		291		291		2,283
Purchased nonimpaired, covered		100		100		742
Purchased nonimpaired, covered and not covered		291		291		2,283
Ending Balance of Loans [Abstract]
Individually evaluated for impairment		407,439		407,439		351,070
Collectively evaluated for impairment		59,036,625		59,036,625		56,453,902
Purchased Impaired Loans		344,650		344,650		361,572
Purchased nonimpaired loans, covered		129,192		129,192		133,618
Purchased nonimpaired loans, covered and not covered		218,512		218,512		205,240
Covered loans		473,842		473,842		495,190
Total loans		60,007,226		60,007,226		57,371,784
Commercial, financial and agricultural
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning of period		323,397	299,879	299,482	292,327
Provision (credit) for loan losses		29,351	29,495	57,703	36,996
Loans charged off		(4,926)	(15,517)	(11,545)	(20,451)
Loan recoveries		3,057	3,933	5,239	8,918
Net (charge offs) recoveries		(1,869)	(11,584)	(6,306)	(11,533)
Allowance for loan losses, end of period		350,879	317,790	350,879	317,790
Ending Balance of Allowance Attributable to Loans [Abstract]
Individually evaluated for impairment		27,131		27,131		11,158
Collectively evaluated for impairment		323,557		323,557		287,105
Purchased nonimpaired		191		191		1,219
Ending Balance of Loans [Abstract]
Individually evaluated for impairment		134,412		134,412		48,173
Collectively evaluated for impairment		24,781,003		24,781,003		23,745,149
Purchased nonimpaired loans		37,773		37,773		35,215
Total loans, excluding covered loans		24,953,188		24,953,188		23,828,537
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning of period	[1]	139,271	153,130	138,233	158,960
Provision (credit) for loan losses	[1]	(5,554)	(5,057)	(5,739)	(9,779)
Loans charged off	[1]	(835)	(7,305)	(1,470)	(9,951)
Loan recoveries	[1]	2,270	2,173	4,128	3,711
Net (charge offs) recoveries	[1]	1,435	(5,132)	2,658	(6,240)
Allowance for loan losses, end of period	[1]	135,152	142,941	135,152	142,941
Ending Balance of Allowance Attributable to Loans [Abstract]
Individually evaluated for impairment	[1]	5,026		5,026		8,466
Collectively evaluated for impairment	[1]	130,126		130,126		129,767
Ending Balance of Loans [Abstract]
Individually evaluated for impairment	[1]	86,108		86,108		105,608
Collectively evaluated for impairment	[1]	12,631,422		12,631,422		11,896,943
Purchased nonimpaired loans	[1]	44,981		44,981		29,307
Total loans, excluding covered loans	[1]	12,762,511		12,762,511		12,031,858
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning of period	[2]	144,947	155,234	154,627	155,575
Provision (credit) for loan losses	[2]	(6,442)	8,039	(12,881)	20,712
Loans charged off	[2]	(8,191)	(13,861)	(14,945)	(29,569)
Loan recoveries	[2]	3,681	4,282	7,194	6,976
Net (charge offs) recoveries	[2]	(4,510)	(9,579)	(7,751)	(22,593)
Allowance for loan losses, end of period	[2]	133,995	153,694	133,995	153,694
Ending Balance of Allowance Attributable to Loans [Abstract]
Individually evaluated for impairment	[2]	36,798		36,798		42,277
Collectively evaluated for impairment	[2]	97,197		97,197		112,350
Ending Balance of Loans [Abstract]
Individually evaluated for impairment	[2]	185,089		185,089		195,462
Collectively evaluated for impairment	[2]	17,009,236		17,009,236		16,665,930
Purchased nonimpaired loans	[2]	1,044		1,044		1,016
Total loans, excluding covered loans	[2]	17,195,369		17,195,369		16,862,408
Consumer loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning of period	[3]	92,781	91,357	89,891	90,903
Provision (credit) for loan losses	[3]	28,224	12,969	48,994	29,798
Loans charged off	[3]	(26,845)	(20,669)	(51,390)	(42,373)
Loan recoveries	[3]	5,399	5,127	12,064	10,456
Net (charge offs) recoveries	[3]	(21,446)	(15,542)	(39,326)	(31,917)
Allowance for loan losses, end of period	[3]	99,559	$ 88,784	99,559	$ 88,784
Ending Balance of Allowance Attributable to Loans [Abstract]
Individually evaluated for impairment	[3]	1,613		1,613		1,532
Collectively evaluated for impairment	[3]	97,946		97,946		88,037
Purchased nonimpaired	[3]	0		0		322
Ending Balance of Loans [Abstract]
Individually evaluated for impairment	[3]	1,830		1,830		1,827
Collectively evaluated for impairment	[3]	4,614,964		4,614,964		4,145,880
Purchased nonimpaired loans	[3]	5,522		5,522		6,084
Total loans, excluding covered loans	[3]	$ 4,622,316		$ 4,622,316		$ 4,153,791

[1]	Includes commercial real estate – mortgage and real estate – construction loans.
[2]	Includes residential real estate – mortgage, equity lines of credit and equity loans.
[3]	Includes credit card, consumer direct and consumer indirect loans.

Loans and Allowance for Loan 45

Loans and Allowance for Loan Losses - Impaired loans by loan class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	$ 40,264		$ 40,264		$ 35,109
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	49,248		49,248		36,582
Individually evaluated impaired loans with a recorded allowance, recorded investment	367,175		367,175		315,961
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	377,235		377,235		335,583
Individually evaluated impaired loans with a recorded allowance, allowance	70,568		70,568		63,433
Total individually evaluated impaired loans, average recorded investment	373,878	$ 407,984	364,149	$ 440,545
Total individually evaluated impaired loans, interest income recognized	2,313	2,845	4,659	5,491
Commercial, financial and agricultural
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	7,751		7,751		0
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	15,140		15,140		0
Individually evaluated impaired loans with a recorded allowance, recorded investment	126,661		126,661		48,173
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	131,299		131,299		61,552
Individually evaluated impaired loans with a recorded allowance, allowance	27,131		27,131		11,158
Total individually evaluated impaired loans, average recorded investment	95,797	88,271	80,339	107,546
Total individually evaluated impaired loans, interest income recognized	366	543	705	788
Real estate - construction
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	3,492		3,492		3,492
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	4,006		4,006		4,006
Individually evaluated impaired loans with a recorded allowance, recorded investment	2,526		2,526		2,686
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	2,571		2,571		2,731
Individually evaluated impaired loans with a recorded allowance, allowance	835		835		872
Total individually evaluated impaired loans, average recorded investment	6,036	9,088	6,076	9,604
Total individually evaluated impaired loans, interest income recognized	37	56	76	119
Commercial real estate - mortgage
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	22,249		22,249		22,822
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	23,330		23,330		23,781
Individually evaluated impaired loans with a recorded allowance, recorded investment	57,841		57,841		76,608
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	62,294		62,294		82,005
Individually evaluated impaired loans with a recorded allowance, allowance	4,191		4,191		7,594
Total individually evaluated impaired loans, average recorded investment	82,055	117,404	85,117	129,376
Total individually evaluated impaired loans, interest income recognized	537	835	1,117	1,777
Residential real estate - mortgage
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	6,772		6,772		8,795
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	6,772		6,772		8,795
Individually evaluated impaired loans with a recorded allowance, recorded investment	102,577		102,577		107,223
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	102,577		102,577		107,306
Individually evaluated impaired loans with a recorded allowance, allowance	6,523		6,523		9,236
Total individually evaluated impaired loans, average recorded investment	110,514	112,862	112,220	113,913
Total individually evaluated impaired loans, interest income recognized	694	725	1,389	1,444
Equity lines of credit
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		0
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		0
Individually evaluated impaired loans with a recorded allowance, recorded investment	26,659		26,659		25,743
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	27,071		27,071		26,124
Individually evaluated impaired loans with a recorded allowance, allowance	23,103		23,103		23,394
Total individually evaluated impaired loans, average recorded investment	26,830	23,511	26,744	23,457
Total individually evaluated impaired loans, interest income recognized	276	255	559	505
Equity loans
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		0
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		0
Individually evaluated impaired loans with a recorded allowance, recorded investment	49,081		49,081		53,701
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	49,593		49,593		54,038
Individually evaluated impaired loans with a recorded allowance, allowance	7,172		7,172		9,647
Total individually evaluated impaired loans, average recorded investment	50,023	55,399	51,229	55,213
Total individually evaluated impaired loans, interest income recognized	401	429	805	854
Credit card
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		0
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		0
Individually evaluated impaired loans with a recorded allowance, recorded investment	0		0		0
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	0		0		0
Individually evaluated impaired loans with a recorded allowance, allowance	0		0		0
Total individually evaluated impaired loans, average recorded investment	0	0	0	0
Total individually evaluated impaired loans, interest income recognized	0	0	0	0
Consumer - direct
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		0
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		0
Individually evaluated impaired loans with a recorded allowance, recorded investment	196		196		337
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	196		196		337
Individually evaluated impaired loans with a recorded allowance, allowance	196		196		42
Total individually evaluated impaired loans, average recorded investment	981	140	831	149
Total individually evaluated impaired loans, interest income recognized	2	1	8	2
Consumer - indirect
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		0
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		0
Individually evaluated impaired loans with a recorded allowance, recorded investment	1,634		1,634		1,490
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	1,634		1,634		1,490
Individually evaluated impaired loans with a recorded allowance, allowance	1,417		1,417		$ 1,490
Total individually evaluated impaired loans, average recorded investment	1,642	1,309	1,593	1,287
Total individually evaluated impaired loans, interest income recognized	$ 0	$ 1	$ 0	$ 2

Loans and Allowance for Loan 46

Loans and Allowance for Loan Losses - Credit quality indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	$ 24,953,188	$ 23,828,537
Real estate - construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,436,831	2,154,652
Commercial real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	10,325,680	9,877,206
Residential real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	14,203,543	13,922,656
Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,352,700	2,304,784
Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	639,126	634,968
Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	592,369	630,456
Consumer - direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	780,368	652,927
Consumer - indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,249,579	2,870,408
Pass \| Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	24,328,227	23,380,541
Pass \| Real estate - construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,406,917	2,098,994
Pass \| Commercial real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	9,962,971	9,514,917
Special Mention \| Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	339,112	280,934
Special Mention \| Real estate - construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	17,077	42,176
Special Mention \| Commercial real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	231,340	210,337
Substandard \| Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	227,651	128,251
Substandard \| Real estate - construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	12,816	13,458
Substandard \| Commercial real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	119,394	129,435
Doubtful \| Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	58,198	38,811
Doubtful \| Real estate - construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	21	24
Doubtful \| Commercial real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	11,975	22,517
Performing \| Residential real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	14,094,899	13,810,857
Performing \| Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,316,428	2,269,231
Performing \| Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	621,470	614,064
Performing \| Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	584,697	621,015
Performing \| Consumer - direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	777,339	649,832
Performing \| Consumer - indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,241,916	2,865,013
Nonperforming \| Residential real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	108,644	111,799
Nonperforming \| Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	36,272	35,553
Nonperforming \| Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	17,656	20,904
Nonperforming \| Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	7,672	9,441
Nonperforming \| Consumer - direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,029	3,095
Nonperforming \| Consumer - indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	$ 7,663	$ 5,395

Loans and Allowance for Loan 47

Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due, Covered	$ 5,930	$ 6,678
60 - 89 Days Past Due, Covered	3,640	4,618
90 Days or More Past Due, Covered	44,528	47,957
Nonaccrual, Covered	136	114
Accruing TDRs, Covered	0	0
Total Past Due and Impaired, Covered	54,234	59,367
Not Past Due or Impaired, Covered	419,608	435,823
Total, Covered	473,842	495,190
30 - 59 Days Past Due, Total Loans	150,803	141,439
60 - 89 Days Past Due, Total Loans	47,832	54,040
90 Days or More Past Due, Total Loans	69,710	71,454
Nonaccrual, Total Loans	395,350	322,654
Accruing TDRs, Total Loans	156,816	162,983
Total Past Due and Impaired, Total Loans	820,511	752,570
Not Past Due or Impaired, Total Loans	59,186,715	56,619,214
Total Loans	60,007,226	57,371,784
Commercial, financial and agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	18,524	10,829
60 - 89 Days Past Due	7,037	5,765
90 Days or More Past Due	3,149	1,610
Nonaccrual	147,051	61,157
Accruing TDRs	9,693	10,127
Total Past Due and Impaired	185,454	89,488
Not Past Due or Impaired	24,767,734	23,739,049
Total	24,953,188	23,828,537
Real estate - construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	148	1,954
60 - 89 Days Past Due	512	994
90 Days or More Past Due	1,157	477
Nonaccrual	7,777	7,964
Accruing TDRs	2,212	2,112
Total Past Due and Impaired	11,806	13,501
Not Past Due or Impaired	2,425,025	2,141,151
Total	2,436,831	2,154,652
Commercial real estate - mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	7,916	9,813
60 - 89 Days Past Due	1,348	4,808
90 Days or More Past Due	2,853	628
Nonaccrual	78,569	89,736
Accruing TDRs	34,389	39,841
Total Past Due and Impaired	125,075	144,826
Not Past Due or Impaired	10,200,605	9,732,380
Total	10,325,680	9,877,206
Residential real estate - mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	45,487	45,279
60 - 89 Days Past Due	14,926	16,510
90 Days or More Past Due	1,703	2,598
Nonaccrual	106,179	108,357
Accruing TDRs	71,357	69,408
Total Past Due and Impaired	239,652	242,152
Not Past Due or Impaired	13,963,891	13,680,504
Total	14,203,543	13,922,656
Equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	7,833	9,929
60 - 89 Days Past Due	4,370	4,395
90 Days or More Past Due	2,515	2,679
Nonaccrual	33,757	32,874
Accruing TDRs	0	0
Total Past Due and Impaired	48,475	49,877
Not Past Due or Impaired	2,304,225	2,254,907
Total	2,352,700	2,304,784
Equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	5,202	6,357
60 - 89 Days Past Due	1,553	3,268
90 Days or More Past Due	1,147	997
Nonaccrual	16,175	19,029
Accruing TDRs	38,998	41,197
Total Past Due and Impaired	63,075	70,848
Not Past Due or Impaired	576,051	564,120
Total	639,126	634,968
Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	4,840	5,692
60 - 89 Days Past Due	3,361	3,921
90 Days or More Past Due	7,672	9,441
Nonaccrual	0	0
Accruing TDRs	0	0
Total Past Due and Impaired	15,873	19,054
Not Past Due or Impaired	576,496	611,402
Total	592,369	630,456
Consumer - direct
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	7,247	9,542
60 - 89 Days Past Due	2,190	1,826
90 Days or More Past Due	2,176	2,296
Nonaccrual	853	799
Accruing TDRs	167	298
Total Past Due and Impaired	12,633	14,761
Not Past Due or Impaired	767,735	638,166
Total	780,368	652,927
Consumer - indirect
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	47,676	35,366
60 - 89 Days Past Due	8,895	7,935
90 Days or More Past Due	2,810	2,771
Nonaccrual	4,853	2,624
Accruing TDRs	0	0
Total Past Due and Impaired	64,234	48,696
Not Past Due or Impaired	3,185,345	2,821,712
Total	$ 3,249,579	$ 2,870,408

Loans and Allowance for Loan 48

Loans and Allowance for Loan Losses - Troubled debt restructurings (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
30 - 59 Days Past Due, Covered	$ 0	$ 0
60 - 89 Days Past Due, Covered	0	0
90 Days or More Past Due, Covered	0	0
Nonaccrual, Covered	16	17
Total Past Due and Nonaccrual, Covered	16	17
Not Past Due or Nonaccrual, Covered	0	0
Total, Covered	16	17
30 - 59 Days Past Due, Total Loans	6,531	5,109
60 - 89 Days Past Due, Total Loans	802	4,348
90 Days or More Past Due, Total Loans	1,224	1,722
Nonaccrual, Total Loans	71,307	80,408
Total Past Due and Nonaccrual, Total Loans	79,864	91,587
Not Past Due or Nonaccrual, Total Loans	148,259	151,804
Total Loans	228,123	243,391
Commercial, financial and agricultural
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	33	11
60-89 Days Past Due	0	0
90 Days or More Past Due	128	0
Nonaccrual	1,400	2,052
Total Past Due and Nonaccrual	1,561	2,063
Not Past Due or Nonaccrual	9,532	10,116
Total	11,093	12,179
Real estate - construction
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Nonaccrual	516	200
Total Past Due and Nonaccrual	516	200
Not Past Due or Nonaccrual	2,212	2,112
Total	2,728	2,312
Commercial real estate - mortgage
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	0	371
60-89 Days Past Due	0	536
90 Days or More Past Due	0	0
Nonaccrual	4,475	7,068
Total Past Due and Nonaccrual	4,475	7,975
Not Past Due or Nonaccrual	34,389	38,934
Total	38,864	46,909
Residential real estate - mortgage
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	3,958	2,440
60-89 Days Past Due	311	2,688
90 Days or More Past Due	762	844
Nonaccrual	27,664	32,518
Total Past Due and Nonaccrual	32,695	38,490
Not Past Due or Nonaccrual	66,326	63,436
Total	99,021	101,926
Equity lines of credit
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Nonaccrual	25,490	24,519
Total Past Due and Nonaccrual	25,490	24,519
Not Past Due or Nonaccrual	0	0
Total	25,490	24,519
Equity loans
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	2,540	2,182
60-89 Days Past Due	491	1,124
90 Days or More Past Due	334	878
Nonaccrual	10,083	12,504
Total Past Due and Nonaccrual	13,448	16,688
Not Past Due or Nonaccrual	35,633	37,013
Total	49,081	53,701
Credit card
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccrual	0	0
Not Past Due or Nonaccrual	0	0
Total	0	0
Consumer - direct
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	0	105
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Nonaccrual	29	40
Total Past Due and Nonaccrual	29	145
Not Past Due or Nonaccrual	167	193
Total	196	338
Consumer - indirect
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Nonaccrual	1,634	1,490
Total Past Due and Nonaccrual	1,634	1,490
Not Past Due or Nonaccrual	0	0
Total	$ 1,634	$ 1,490

Loans and Allowance for Loan 49

Loans and Allowance for Loan Losses - Classified as troubled debt restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)Contract	Jun. 30, 2014USD ($)Contract	Jun. 30, 2015USD ($)Contract	Jun. 30, 2014USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of contracts, covered \| Contract	1	0	2	0
Post modification outstanding, recorded investment, covered	$ 16	$ 0	$ 21	$ 0
Number of subsequent default contracts, covered \| Contract	1	0	1	0
Recorded investment at subsequent default, covered	$ 6	$ 0	$ 6	$ 0
Commercial, financial and agricultural
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	2	2	3	2
Post modification outstanding, recorded investment	$ 236	$ 163	$ 311	$ 163
Number of subsequent default contracts \| Contract	0	0	0	0
Recorded investment at subsequent default	$ 0	$ 0	$ 0	$ 0
Real estate - construction
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	0	0	0	0
Post modification outstanding, recorded investment	$ 0	$ 0	$ 0	$ 0
Number of subsequent default contracts \| Contract	1	0	1	0
Recorded investment at subsequent default	$ 377	$ 0	$ 377	$ 0
Commercial real estate - mortgage
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	1	3	1	9
Post modification outstanding, recorded investment	$ 226	$ 2,656	$ 226	$ 6,586
Number of subsequent default contracts \| Contract	0	1	1	1
Recorded investment at subsequent default	$ 0	$ 2,198	$ 178	$ 2,198
Residential real estate - mortgage
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	11	46	22	56
Post modification outstanding, recorded investment	$ 2,505	$ 4,124	$ 4,245	$ 5,118
Number of subsequent default contracts \| Contract	1	0	5	0
Recorded investment at subsequent default	$ 96	$ 0	$ 743	$ 0
Equity lines of credit
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	28	48	59	97
Post modification outstanding, recorded investment	$ 1,351	$ 2,178	$ 3,264	$ 4,480
Number of subsequent default contracts \| Contract	0	0	0	3
Recorded investment at subsequent default	$ 0	$ 0	$ 0	$ 275
Equity loans
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	6	23	20	41
Post modification outstanding, recorded investment	$ 778	$ 1,330	$ 1,496	$ 3,317
Number of subsequent default contracts \| Contract	0	3	2	4
Recorded investment at subsequent default	$ 0	$ 319	$ 161	$ 382
Credit card
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	0	0	0	0
Post modification outstanding, recorded investment	$ 0	$ 0	$ 0	$ 0
Number of subsequent default contracts \| Contract	0	0	0	0
Recorded investment at subsequent default	$ 0	$ 0	$ 0	$ 0
Consumer - direct
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	17	0	17	0
Post modification outstanding, recorded investment	$ 302	$ 0	$ 302	$ 0
Number of subsequent default contracts \| Contract	0	0	0	0
Recorded investment at subsequent default	$ 0	$ 0	$ 0	$ 0
Consumer - indirect
Financing Receivable, Modifications [Line Items]
Number of contracts \| Contract	0	32	22	50
Post modification outstanding, recorded investment	$ 0	$ 470	$ 379	$ 672
Number of subsequent default contracts \| Contract	0	0	1	0
Recorded investment at subsequent default	$ 0	$ 0	$ 18	$ 0

Loans and Allowance for Loan 50

Loans and Allowance for Loan Losses - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Purchased impaired loans, allowance	$ 1,786,000		$ 1,786,000		$ 2,066,000
Recognized provision for loan losses attributable to credit deterioration (improvements) subsequent to acquisition of loan	1,000,000	$ 2,500,000	105,000	$ 4,600,000
Interest income on purchased nonimpaired loans	16,800,000	35,400,000	53,400,000	73,200,000
Recorded investment of purchased impaired loans with credit deterioration subsequent to acquisition that were individually evaluated for impairment	1,900,000		1,900,000		1,300,000
Unpaid principle balance of purchased impaired loans with credit deterioration subsequent to acquisition that were individually evaluated for impairment	4,700,000		4,700,000		4,700,000
Allowance recorded on purchased impaired loans with credit deterioration subsequent to acquisition that were individually evaluated for impairment	0		0		0
Commitment to lend additional funds to borrowers owing TDR loans	927,000		927,000		1,100,000
Other real estate owned	20,188,000		20,188,000		20,600,000
Residential real estate loans secured by loans in formal foreclosure proceedings that are in process	33,000,000		33,000,000		26,000,000
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Other real estate owned	15,000,000		15,000,000		$ 11,000,000
Interest rate concession
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
TDRs	600,000	4,500,000	900,000	6,900,000
Modification of loan structure
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
TDRs	$ 4,800,000	$ 6,400,000	$ 9,300,000	$ 13,400,000

Loan Sales and Servicing - Narr

Loan Sales and Servicing - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
Loan Sales and Servicing - Narrative (Details) - USD ($)	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 195,616,000		$ 195,616,000		$ 154,816,000
Transfer of loans to loans held for sale	0	$ 14,000,000	0	$ 14,000,000
Charge-off at transfer to held for sale		4,000,000		4,000,000
Balance of residential mortgage loans sold with retained servicing	3,800,000,000		3,800,000,000		3,300,000,000
Fair value of MSRs	40,871,000		40,871,000		$ 35,488,000
Originated For Sale In The Secondary Market
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential mortgage loans sold	340,000,000	181,000,000	585,000,000	369,000,000
Recognized net gains or losses on sale of residential mortgage loans	11,400,000	5,800,000	22,000,000	11,300,000
Residential real estate - mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Servicing fees	5,100,000	3,700,000	9,900,000	7,300,000
Residential Real Estate Mortgage Loans Sold with Retained Servicing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential mortgage loans sold	339,000,000	181,000,000	584,000,000	369,000,000
Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market \| Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost of loans and leases sold	$ 10,000,000	$ 39,000,000	$ 10,000,000	$ 100,000,000

Loan Sales and Servicing - Resi

Loan Sales and Servicing - Residential MSRs (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance				$ 35,488
Ending balance		$ 40,871		40,871
Residential mortgage
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		35,213	$ 31,828	35,488	$ 30,065
Additions		3,963	1,923	6,722	4,006
Due to changes in valuation inputs or assumptions		2,446	(2,085)	(146)	(1,794)
Due to other changes in fair value	[1]	(751)	(562)	(1,193)	(1,173)
Ending balance		$ 40,871	$ 31,104	$ 40,871	$ 31,104

[1]	Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time.

Loan Sales and Servicing - Valu

Loan Sales and Servicing - Valuation Assumptions (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Servicing Assets at Fair Value [Line Items]
Fair value of MSRs	$ 40,871	$ 35,488
Mortgage loans sold and serviced, percentage	100.00%	100.00%
Weighted average life (in years)	6 years 2 months 12 days	6 years 2 months 12 days
Prepayment speed:	10.80%	10.60%
Effect on fair value of a 10% increase	$ (1,494)	$ (1,220)
Effect on fair value of a 20% increase	$ (2,881)	$ (2,375)
Weighted average discount rate:	10.10%	10.10%
Effect on fair value of a 10% increase	$ (1,430)	$ (1,291)
Effect on fair value of a 20% increase	$ (2,760)	$ (2,492)
Fixed rate mortgage loan
Servicing Assets at Fair Value [Line Items]
Mortgage loans sold and serviced, percentage	96.30%	96.10%
Adjustable rate mortgage loan
Servicing Assets at Fair Value [Line Items]
Mortgage loans sold and serviced, percentage	3.70%	3.90%

Derivatives and Hedging - Deriv

Derivatives and Hedging - Derivatives by Balance Sheet Location (Details) - USD ($) $ in Thousands		Jun. 30, 2015		Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative assets		$ 223,166		$ 225,227
Derivative liabilities		278,220		259,018
Derivatives designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	72,532		71,493
Derivative liabilities	[2]	40,141		14,497
Derivatives designated as hedging instrument \| Fair value hedges
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	67,754		69,700
Derivative liabilities	[2]	28,088
Derivatives designated as hedging instrument \| Fair value hedges \| Interest rate swap long term debt
Derivatives, Fair Value [Line Items]
Derivative, notional amount		2,123,950		1,423,950
Derivative assets	[1]	67,754		69,700
Derivative liabilities	[2]	28,088
Derivatives designated as hedging instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	4,778		1,793
Derivative liabilities	[2]	12,053		14,497
Derivatives designated as hedging instrument \| Cash flow hedges \| Interest rate swap commercial loan
Derivatives, Fair Value [Line Items]
Derivative, notional amount		2,100,000		1,100,000
Derivative assets	[1]	4,778		1,793
Derivative liabilities		85	[2]	1,023
Derivatives designated as hedging instrument \| Cash flow hedges \| Interest rate swap FHLB advances
Derivatives, Fair Value [Line Items]
Derivative, notional amount		320,000		320,000
Derivative liabilities	[2]	11,968		13,474
Free-standing derivatives not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	395,896		414,470
Derivative liabilities	[2]	324,337		347,761
Free-standing derivatives not designated as hedging instrument \| Forward and option contracts related to residential mortgage loans held for sale
Derivatives, Fair Value [Line Items]
Derivative, notional amount		905,500		189,000
Derivative assets	[1]	2,956		18
Derivative liabilities	[2]	518		1,576
Free-standing derivatives not designated as hedging instrument \| Purchased equity option related to equity-linked CDs
Derivatives, Fair Value [Line Items]
Derivative, notional amount		867,419		821,849
Derivative assets	[1]	62,453		76,487
Free-standing derivatives not designated as hedging instrument \| Equity contracts, swap associated with sale of Visa Inc. Class B shares
Derivatives, Fair Value [Line Items]
Derivative, notional amount		58,791		57,393
Derivative liabilities	[2]	1,470		1,435
Free-standing derivatives not designated as hedging instrument \| Forward contracts related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		577,470		602,066
Derivative assets	[1]	2,336		5,529
Derivative liabilities	[2]	3,819		612
Free-standing derivatives not designated as hedging instrument \| Spot contracts related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		65,347		74,940
Derivative assets	[1]	107		41
Derivative liabilities	[2]	69		80
Free-standing derivatives not designated as hedging instrument \| Futures contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount	[3]	447,000		342,000
Free-standing derivatives not designated as hedging instrument \| Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative, notional amount		235,237		180,822
Derivative assets	[1]	3,482		2,319
Derivative liabilities	[2]	25		1
Free-standing derivatives not designated as hedging instrument \| Written equity option related to equity-linked CDs
Derivatives, Fair Value [Line Items]
Derivative, notional amount		831,221		795,467
Derivative liabilities	[2]	60,259		74,319
Free-standing derivatives not designated as hedging instrument \| Interest rate contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		22,343,465		18,678,390
Derivative assets	[1]	300,286		296,239
Derivative liabilities	[2]	234,601		236,763
Free-standing derivatives not designated as hedging instrument \| Commodity contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		191,683		264,491
Derivative assets	[1]	15,775		25,569
Derivative liabilities	[2]	15,689		25,448
Free-standing derivatives not designated as hedging instrument \| Foreign exchange contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		427,958		425,123
Derivative assets	[1]	8,501		8,268
Derivative liabilities	[2]	7,887		7,527
Free-standing derivatives not designated as hedging instrument \| Total trading account assets and liabilities
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	324,562		330,076
Derivative liabilities	[2]	$ 258,177		$ 269,738

[1]	Derivative assets, except for trading account assets that are recorded as a component of trading account assets on the Company's Unaudited Condensed Consolidated Balance Sheets, are recorded in other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets.
[2]	Derivative liabilities are recorded in accrued expenses and other liabilities on the Company’s Unaudited Condensed Consolidated Balance Sheets.
[3]	Changes in fair value are cash settled daily; therefore, there is no ending balance at any given reporting period.

Derivatives and Hedging - Fair

Derivatives and Hedging - Fair Value Hedges (Details) - Derivatives designated as hedging instrument - Fair value hedges - Interest Rate Swap - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges weighted average expected remaining term			5 years 7 months 10 days
Interest on FHLB and other borrowings
Interest Rate Fair Value Hedges [Abstract]
Change in fair value of interest rate contract - interest rate swaps hedging long term debt	$ (40,151)	$ 811	$ (30,033)	$ (124)
Change in fair value of interest rate contract - hedged long term debt	35,536	(838)	26,123	219
Interest and amortization related to interest rate swaps on hedged long term debt	$ 12,178	$ 6,016	$ 21,744	$ 12,032

Derivatives and Hedging - Cash

Derivatives and Hedging - Cash Flow Hedges (Details) - Derivatives designated as hedging instrument - Cash flow hedges - Interest Rate Swap - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges not terminated, net fair value	$ (7,300)		$ (7,300)
Fair value hedges weighted average expected remaining term			1 year 11 months 11 days
Maximum length of time hedged in interest rate cash flow hedge			6 years 28 days
Interest Rate Cash Flow Hedges [Abstract]
Net change in amount recognized in other comprehensive income	1,013	$ (875)	$ 3,072	$ (1,682)
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain to be reclassified within twelve months			3,500
Interest Rate Cash Flow Hedges [Abstract]
Amount reclassified from accumulated other comprehensive income into net interest income	1,807	(564)	2,854	(1,727)
Amount of ineffectiveness recognized in net interest income	$ 0	$ 0	$ 0	$ 0

Derivatives and Hedging - Free

Derivatives and Hedging - Free Standing Derivative Instruments (Details) - Free-standing derivatives not designated as hedging instrument - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Futures contracts \| Mortgage Banking Income and Corporate and Correspondent Investment Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 2	$ (157)	$ 49	$ (233)
Option contracts related to mortgage servicing rights \| Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	0	41	(195)	41
Forward and option contracts related to residential mortgage loans held for sale \| Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	4,396	(2,594)	3,996	(4,148)
Interest rate lock commitments \| Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(1,530)	2,139	1,139	2,931
Interest rate contracts for customers \| Corporate and correspondent investments sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	11,890	4,040	16,529	9,158
Commodity contracts for customers \| Corporate and correspondent investments sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(5)	(105)	9	(97)
Purchased equity option related to equity-linked CDs \| Other expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(7,747)	2,929	(14,035)	6,707
Written equity option related to equity-linked CDs \| Other expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	7,700	(2,865)	14,060	(6,544)
Forward contracts related to commercial loans \| Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(23,483)	(11,943)	23,084	(17,430)
Spot contracts related to commercial loans \| Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	3,375	2,527	(3,520)	3,407
Foreign currency exchange contracts for customers \| Corporate and correspondent investments sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 481	$ 177	$ 861	$ 370

Derivatives and Hedging - Credi

Derivatives and Hedging - Credit and Market Risks (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Credit Derivatives [Line Items]
Derivative, collateral, right to reclaim cash	$ 132,340		$ 132,340		$ 44,163
Derivative, collateral, obligation to return	36,739		36,739		58,309
Other assets
Credit Derivatives [Line Items]
Derivative, collateral, right to reclaim cash	135,000		135,000		46,000
Deposits
Credit Derivatives [Line Items]
Derivative, collateral, obligation to return	46,000		46,000		$ 62,000
Free-standing derivatives not designated as hedging instrument \| Interest Rate Swap
Credit Derivatives [Line Items]
Credit risk derivatives, at fair value, net	325,000		325,000
Gain (loss) on derivative instruments held for trading purposes, net	0	$ (727)	0	$ (726)
Derivatives designated as hedging instrument \| Interest Rate Swap \| Over the Counter
Credit Derivatives [Line Items]
Credit risk derivatives, at fair value, net	$ 73,000		$ 73,000

Derivatives and Hedging - Conti

Derivatives and Hedging - Contingent Features (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, net liability position, aggregate fair value	$ 49	$ 65
Collateral already posted, aggregate fair value	48	62
Additional collateral, aggregate fair value	$ 1	$ 4

Derivatives and Hedging - Netti

Derivatives and Hedging - Netting Arrangements (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Derivative financial assets:
Derivative assets, total derivatives subject to a master netting arrangement, gross amounts recognized		$ 223,166	$ 225,227
Derivative assets, total derivative subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheet		0	0
Derivative assets, total derivatives subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		223,166	225,227
Derivative assets, total derivatives subject to a master netting arrangement, gross amounts not offset in the condensed consolidated balance sheet, financial instruments	[1]	0	0
Derivate assets, total derivatives subject to a master netting arrangement, gross amounts not offset in the condensed consolidated balance sheets, cash collateral received/pledged		36,739	58,309
Derivative assets, total derivatives subject to a master netting arrangement, net amount		186,427	166,918
Derivative assets, total derivatives not subject to a master netting arrangement		245,262	260,736
Total derivative financial assets, gross amounts recognized		468,428	485,963
Total derivative financial assets, net amount presented in the condensed consolidated balance sheet		468,428	485,963
Total derivative financial assets, net amount		431,689	427,654
Derivative financial liabilities:
Derivative liabilities, total derivative subject to a master netting arrangement, gross amounts recognized		278,220	259,018
Derivative liabilities, total derivative subject to a master netting arrangement, gross amount offset in the condensed consolidated balance sheets		0	0
Total derivative financial liabilities, net amount presented in the condensed consolidated balance sheets		364,478	362,258
Derivative liabilities, total derivative subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		278,220	259,018
Derivative liabilities, total derivative subject to a master netting arrangement, gross amounts not offset in the condensed consolidated balance sheets, financial instruments	[1]	28,835	29,677
Derivative liabilities, total derivative subject to a master netting arrangement, gross amounts not offset in the condensed consolidated balance sheets, cash collateral received/pledged		132,340	44,163
Total derivative financial liabilities, net amount		203,303	288,418
Derivative liabilities, total derivatives subject to a master netting arrangement, net amount		117,045	185,178
Derivative liabilities, total derivatives not subject to a master netting arrangement		86,258	103,240
Derivative liabilities, total derivative financial liabilities, gross amount recognized		$ 364,478	$ 362,258

[1]	The actual amount of collateral received/pledged is limited to the asset/liability balance and does not include excess collateral received/pledged. When excess collateral exists, the collateral shown in the table above has been allocated based on the percentage of the actual amount of collateral posted.

Securities Financing Activiti61

Securities Financing Activities Securities Financing Activities - Contractual Maturities (Details) $ in Thousands	Jun. 30, 2015USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	$ 4,747,554
US Treasury And Agency Agreements [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	4,747,554
Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	3,867,485
Overnight and Continuous [Member] \| US Treasury And Agency Agreements [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	3,867,485
Up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	426,293
Up to 30 days [Member] \| US Treasury And Agency Agreements [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	426,293
30 - 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	453,776
30 - 90 days [Member] \| US Treasury And Agency Agreements [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	453,776
Greater Than 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0
Greater Than 90 days [Member] \| US Treasury And Agency Agreements [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	$ 0

Securities Financing Activiti62

Securities Financing Activities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Transfers and Servicing [Abstract]
Fair value of collateral received related to securities purchased under agreements to resell	$ 4,900,000	$ 2,600,000
Fair value of collateral pledged related to securities sold under agreements to repurchase	4,600,000	2,500,000
Securities purchased under agreements to resell
Securities purchased under agreements to resell, subject to master netting arrangement, gross amounts recognized	5,157,723	3,100,200
Securities purchased under agreements to resell, subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheets	4,695,179	2,533,661
Securities purchased under agreements to resell, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets	462,544	566,539
Securities purchased under agreements to resell, subject to a master netting arrangement, gross amounts not offset in the condensed consolidated balance sheets, financial instruments	462,544	566,539
Securities purchased under agreements to resell, net amount	0	0
Securities sold under agreements to repurchase
Securities sold under agreements to repurchase, subject to a master netting arrangement, gross amounts recognized	4,747,554	2,969,345
Securities sold under agreements to repurchase, gross amounts offset in the condensed consolidated balance sheets	4,695,179	2,533,661
Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheet	52,375	435,684
Securities sold under agreements to repurchase, subject to a master netting arrangement, gross amounts not offset in the condensed consolidated balance sheet, financial instruments	52,375	435,684
Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount	$ 0	$ 0

Commitments, Contingencies an63

Commitments, Contingencies and Guarantees - Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Guarantor Obligations [Line Items]
Commitments to extend credit	$ 28,458,151	$ 28,369,666
Financial Standby Letter of Credit
Guarantor Obligations [Line Items]
Standby and commercial letters of credit	$ 1,703,415	$ 1,871,323

Commitments, Contingencies an64

Commitments, Contingencies and Guarantees - Narrative (Details) - USD ($)	1 Months Ended			6 Months Ended
	Feb. 28, 2015	Mar. 31, 2014	May. 31, 2013	Jun. 30, 2015	Dec. 31, 2014
Loss Contingencies And Guarantor Obligations [Line Items]
Loss contingency accrual				$ 13,000,000
Pending Litigation \| BBVA Compass v. Morris Cerullo World Evangelism
Loss Contingencies And Guarantor Obligations [Line Items]
Damages sought			$ 5,200,000
Pending Litigation \| Morris Cerullo World Evangelism v. BBVA Compass and Jack Wilkinson
Loss Contingencies And Guarantor Obligations [Line Items]
Damages sought	$ 5,200,000
Pending Litigation \| Jack Demetree Vs. BBVA Compass
Loss Contingencies And Guarantor Obligations [Line Items]
Damages sought		$ 17,100,000
Potential Recourse Related To FNMA Securitizations
Loss Contingencies And Guarantor Obligations [Line Items]
Potential recourse				19,000,000	$ 20,000,000
Potential Recourse Related To FNMA Securitizations \| Accrued expenses and other liabilities
Loss Contingencies And Guarantor Obligations [Line Items]
Loss contingency accrual				740,000	655,000
Standard Representations And Warranties Related To Loan Sales To Government-Sponsored Agencies \| Accrued expenses and other liabilities
Loss Contingencies And Guarantor Obligations [Line Items]
Loss contingency accrual				1,000,000	1,000,000
FDIC Loss Sharing Agreement
Loss Contingencies And Guarantor Obligations [Line Items]
Covered loans				$ 9,700,000,000
Loan losses reimbursable by FDIC, percentage of loss reimbursable				80.00%
FDIC indemnification asset, threshold loss amount				$ 2,300,000,000
FDIC indemnification asset, percentage of incurred losses above threshold, amount reimbursed				95.00%
FDIC loss sharing agreement, term				10 years
Loss sharing agreement, percentage owed by company to FDIC if terms are met				60.00%
Loss sharing agreement, threshold amount				$ 457,000,000
Loss sharing agreement, percentage of net amount paid to company, subject to repayment to FDIC				25.00%
Loss sharing agreement, administration costs for loans, percentage subject to repayment to FDIC				20.00%
Loss sharing agreement, average administration cost percentage				2.00%
Loss sharing agreement, amount owed to FDIC				$ 145,000,000	145,000,000
FDIC Loss Sharing Agreement \| Commercial Loan
Loss Contingencies And Guarantor Obligations [Line Items]
FDIC loss sharing agreement, term				5 years
FDIC Loss Sharing Agreement \| Single Family Residential Loan
Loss Contingencies And Guarantor Obligations [Line Items]
FDIC loss sharing agreement, term				10 years
Financial Standby Letter of Credit
Loss Contingencies And Guarantor Obligations [Line Items]
Letters of credit, deferred fees				$ 6,500,000	5,200,000
Maximum potential amount of future undiscounted payments Company could be required to make on outstanding standby letters of credit				1,700,000,000	1,700,000,000
Financial Standby Letter of Credit \| Pending Litigation \| BBVA Compass v. Morris Cerullo World Evangelism
Loss Contingencies And Guarantor Obligations [Line Items]
Line of credit			$ 5,200,000
Financial Standby Letter of Credit \| Pending Litigation \| Morris Cerullo World Evangelism v. BBVA Compass and Jack Wilkinson
Loss Contingencies And Guarantor Obligations [Line Items]
Line of credit	$ 5,200,000
Financial Standby Letter of Credit \| Accrued expenses and other liabilities
Loss Contingencies And Guarantor Obligations [Line Items]
Loss contingency accrual				$ 86,000,000	$ 94,000,000
Financial Standby Letter of Credit \| Minimum
Loss Contingencies And Guarantor Obligations [Line Items]
Standby and commercial letters of credit expiration term				1 year
Financial Standby Letter of Credit \| Maximum
Loss Contingencies And Guarantor Obligations [Line Items]
Standby and commercial letters of credit expiration term				4 years

Fair Value of Financial Instr65

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Federal home loan bank and federal reserve stock required to be owned by company	$ 555		$ 555		$ 500
Forward contracts
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains realized due to changes in fair value of loans	4.4	$ (2.6)	4	$ (4.1)
Noninterest income \| Residential mortgage loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains realized due to changes in fair value of loans	$ (2.6)	$ 5.4	$ (2.1)	$ 6.1

Fair Value of Financial Instr66

Fair Value of Financial Instruments - Unpaid Principle Balances (Details) - Residential mortgage loans held for sale - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate fair value	$ 195,616	$ 154,816
Aggregate unpaid principle balance	191,433	148,564
Difference	$ 4,183	$ 6,252

Fair Value of Financial Instr67

Fair Value of Financial Instruments - Fair value of balance sheet items (Details) - USD ($) $ in Thousands	Jun. 30, 2015		Dec. 31, 2014
Assets:
Trading account assets	$ 4,879,125		$ 2,834,397
Loans held for sale, estimated fair value	195,616		154,816
Investment securities available for sale	10,392,484		10,237,275
Derivative asset	468,428		485,963
Other assets	1,332,923		1,318,392
Liabilities:
Derivative liabilities	364,478		362,258
US Treasury and government agency
Assets:
Investment securities available for sale	2,666,108		2,313,542
State and political subdivisions
Assets:
Investment securities available for sale	370,781		467,315
Other debt obligations
Assets:
Investment securities available for sale	24,241		44,441
Mortgage-backed securities
Assets:
Investment securities available for sale	2,482,660		2,488,579
Equity securities
Assets:
Investment securities available for sale	554,861		499,563
Fair Value, measurements, recurring
Assets:
Trading account assets	4,879,125		2,834,397
Loans held for sale, estimated fair value	195,616		154,816
Investment securities available for sale	9,837,923		9,737,760
Derivative asset	143,866		155,887
Other assets	40,871		35,488
Liabilities:
Trading account liabilities	5,090,331		2,815,462
Derivative liabilities	104,831		91,085
Fair Value, measurements, recurring \| Interest rate contracts
Assets:
Derivative asset	78,970		73,830
Liabilities:
Derivative liabilities	40,684		16,074
Fair Value, measurements, recurring \| Equity Contract
Assets:
Derivative asset	62,453		76,487
Liabilities:
Derivative liabilities	60,259		74,319
Fair Value, measurements, recurring \| Foreign exchange contracts
Assets:
Derivative asset	2,443		5,570
Liabilities:
Derivative liabilities	3,888		692
Fair Value, measurements, recurring \| US Treasury and government agency
Assets:
Trading account assets	4,540,788		2,502,308
Investment securities available for sale	2,666,108		2,313,542
Liabilities:
Trading account liabilities	4,829,553		2,545,299
Fair Value, measurements, recurring \| State and political subdivisions
Assets:
Trading account assets	1,332
Investment securities available for sale	370,781		467,315
Fair Value, measurements, recurring \| Other debt obligations
Assets:
Trading account assets	9,428
Investment securities available for sale	24,241		44,441
Liabilities:
Trading account liabilities	2,525
Fair Value, measurements, recurring \| Interest rate contracts
Assets:
Trading account assets	300,286		296,239
Liabilities:
Trading account liabilities	234,601		236,763
Fair Value, measurements, recurring \| Commodity contracts for customers
Assets:
Trading account assets	15,775		25,569
Liabilities:
Trading account liabilities	15,689		25,448
Fair Value, measurements, recurring \| Foreign exchange contracts
Assets:
Trading account assets	8,501		8,268
Liabilities:
Trading account liabilities	7,887		7,527
Fair Value, measurements, recurring \| Other trading assets
Assets:
Trading account assets	3,015		2,013
Fair Value, measurements, recurring \| Mortgage-backed securities
Assets:
Investment securities available for sale	4,293,833		4,423,835
Fair Value, measurements, recurring \| Collateralized mortgage obligations
Assets:
Investment securities available for sale	2,482,660		2,488,579
Fair Value, measurements, recurring \| Equity securities
Assets:
Investment securities available for sale	300	[1]	48	[2]
Fair Value, measurements, recurring \| Other trading liabilities
Liabilities:
Trading account liabilities	76		425
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1
Assets:
Trading account assets	4,540,788		2,502,308
Investment securities available for sale	1,447,884		1,342,525
Liabilities:
Trading account liabilities	4,829,553		2,545,299
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1 \| US Treasury and government agency
Assets:
Trading account assets	4,540,788		2,502,308
Investment securities available for sale	1,423,594		1,298,040
Liabilities:
Trading account liabilities	4,829,553		2,545,299
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1 \| Other debt obligations
Assets:
Investment securities available for sale	24,241		44,441
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1 \| Equity securities
Assets:
Investment securities available for sale	49	[1]	44	[2]
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2
Assets:
Trading account assets	336,937		330,499
Loans held for sale, estimated fair value	195,616		154,816
Investment securities available for sale	8,389,788		8,395,231
Derivative asset	140,384		153,568
Liabilities:
Trading account liabilities	260,778		270,163
Derivative liabilities	104,806		91,084
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Interest rate contracts
Assets:
Derivative asset	75,488		71,511
Liabilities:
Derivative liabilities	40,659		16,073
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Equity Contract
Assets:
Derivative asset	62,453		76,487
Liabilities:
Derivative liabilities	60,259		74,319
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Foreign exchange contracts
Assets:
Derivative asset	2,443		5,570
Liabilities:
Derivative liabilities	3,888		692
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| US Treasury and government agency
Assets:
Investment securities available for sale	1,242,514		1,015,502
Liabilities:
Trading account liabilities	0
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| State and political subdivisions
Assets:
Trading account assets	1,332
Investment securities available for sale	370,781		467,315
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Other debt obligations
Assets:
Trading account assets	9,428
Investment securities available for sale	0		0
Liabilities:
Trading account liabilities	2,525
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Interest rate contracts
Assets:
Trading account assets	300,286		296,239
Liabilities:
Trading account liabilities	234,601		236,763
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Commodity contracts for customers
Assets:
Trading account assets	15,775		25,569
Liabilities:
Trading account liabilities	15,689		25,448
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Foreign exchange contracts
Assets:
Trading account assets	8,501		8,268
Liabilities:
Trading account liabilities	7,887		7,527
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Other trading assets
Assets:
Trading account assets	1,615		423
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Mortgage-backed securities
Assets:
Investment securities available for sale	4,293,833		4,423,835
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Collateralized mortgage obligations
Assets:
Investment securities available for sale	2,482,660		2,488,579
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Other trading liabilities
Liabilities:
Trading account liabilities	76		425
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3
Assets:
Trading account assets	1,400		1,590
Investment securities available for sale	251		4
Derivative asset	3,482		2,319
Other assets	40,871		35,488
Liabilities:
Derivative liabilities	25		1
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3 \| Interest rate contracts
Assets:
Derivative asset	3,482		2,319
Liabilities:
Derivative liabilities	25		1
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3 \| Other trading assets
Assets:
Trading account assets	1,400		1,590
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3 \| Equity securities
Assets:
Investment securities available for sale	$ 251	[1]	$ 4	[2]

[1]	Excludes $555 million of FHLB and Federal Reserve stock required to be owned by the Company at June 30, 2015. These securities are carried at par.
[2]	Excludes $500 million of FHLB and Federal Reserve stock required to be owned by the Company at December 31, 2014. These securities are carried at par.

Fair Value of Financial Instr68

Fair Value of Financial Instruments - Assets measured on a recurring basis (Details) - Fair Value, measurements, recurring - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other trading securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		$ 1,436	$ 1,692	$ 1,590	$ 1,645
Included in earnings	[1]	(36)	17	(190)	64
Purchases, issuances, sales and settlements: [Abstract]
Balance, end of year		1,400	1,709	1,400	1,709
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		(36)	17	(190)	64
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		80	6	4	6
Purchases, issuances, sales and settlements: [Abstract]
Purchases		171		247
Balance, end of year		251	6	251	6
Interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		4,987	1,682	2,318	890
Included in earnings	[1]	(1,530)	2,139	1,139	2,931
Purchases, issuances, sales and settlements: [Abstract]
Balance, end of year		3,457	3,821	3,457	3,821
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		(1,530)	2,139	1,139	2,931
Other assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		35,213	31,828	35,488	30,065
Included in earnings	[1]	1,695	(2,647)	(1,339)	(2,967)
Purchases, issuances, sales and settlements: [Abstract]
Issuances		3,963	1,923	6,722	4,006
Balance, end of year		40,871	31,104	40,871	31,104
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		$ 1,695	$ (2,647)	$ (1,339)	$ (2,967)

[1]	Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

Fair Value of Financial Instr69

Fair Value of Financial Instruments - Assets measured on nonrecurring basis (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment Securities - Fair Value		$ 1,281,338		$ 1,281,338		$ 1,275,963
OREO, fair value		20,188	$ 21,113	20,188	$ 21,113
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment Securities - Fair Value		1,281,338		1,281,338		$ 1,275,963
Fair Value, measurements, nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment Securities - Fair Value		15,621	3,690	15,621	3,690
Investment securities held to maturity recorded as other than temporary impairment losses		(1,013)	(34)	(1,298)	(180)
Impaired loans, fair value	[1]	179,288	131,622	179,288	131,622
Impaired loans, total gains (losses)	[1]	(1,549)	(14,532)	(4,853)	(18,875)
OREO, total gains (losses)		(923)	(689)	(2,182)	(1,582)
Fair Value, measurements, nonrecurring \| Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment Securities - Fair Value		15,621	3,690	15,621	3,690
Impaired loans, fair value	[1]	179,288	131,622	179,288	131,622
OREO, fair value		$ 20,188	$ 21,113	$ 20,188	$ 21,113

[1]	Total gains (losses) represent charge-offs on impaired loans for which adjustments are based on the appraised value of the collateral.

Fair Value of Financial Instr70

Fair Value of Financial Instruments - Quantitative information about unobservable inputs for material assets and liabilities measured using fair value (Details) - USD ($)		6 Months Ended
		Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment Securities - Fair Value		$ 1,281,338,000	$ 1,275,963,000
OREO, fair value		20,188,000		$ 21,113,000
Fair Value, measurements, recurring \| Other trading securities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Other trading asset, fair value		1,400,000
Fair Value, measurements, recurring \| Interest rate contracts
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Interest rate contracts, fair value		3,457,000
Fair Value, measurements, recurring \| Other assets
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Other assets -MSRs, fair value		40,871,000
Fair Value, measurements, nonrecurring
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment Securities - Fair Value		15,621,000		3,690,000
Impaired loans, fair value	[1]	179,288,000		131,622,000
Fair Value, Inputs, Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment Securities - Fair Value		$ 1,281,338,000	$ 1,275,963,000
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Minimum \| Other trading securities \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		5.60%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Minimum \| Interest rate contracts \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Closing rate		6.90%
Cap grid rate		0.20%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Minimum \| Other assets \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		6.10%
Cost to service		$ 64
Discount rate		10.00%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Maximum \| Other trading securities \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		9.90%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Maximum \| Interest rate contracts \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Closing rate		98.70%
Cap grid rate		2.50%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Maximum \| Other assets \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		51.50%
Cost to service		$ 766
Discount rate		11.00%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Average \| Other trading securities \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Default rate		8.30%
Prepayment rate		7.40%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Average \| Interest rate contracts \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Closing rate		65.70%
Cap grid rate		1.10%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Average \| Other assets \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		10.80%
Cost to service		$ 67
Discount rate		10.10%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment Securities - Fair Value		$ 15,621,000		3,690,000
Impaired loans, fair value	[1]	179,288,000		131,622,000
OREO, fair value		$ 20,188,000		$ 21,113,000
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Minimum \| Impaired loans \| Appraised value
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Appraised value rate		0.00%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Maximum \| Impaired loans \| Appraised value
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Appraised value rate		100.00%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Average \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Default rate		7.50%
Prepayment rate		9.60%
Loss severity rate		61.20%
Expected loss rate		7.90%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Average \| Impaired loans \| Appraised value
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Appraised value rate		26.70%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Average \| OREO \| Appraised value
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Appraised value rate		8.00%

[1]	Total gains (losses) represent charge-offs on impaired loans for which adjustments are based on the appraised value of the collateral.

Fair Value of Financial Instr71

Fair Value of Financial Instruments - Carrying value and estimated fair value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 3,865,421	$ 3,388,405	$ 3,264,202	$ 3,598,460
Investment securities held to maturity	1,375,075	1,348,354
Investment securities held to maturity, estimated fair value	1,281,338	1,275,963
Deposits	62,499,369	61,189,716
Federal funds purchased and securities sold under agreements to repurchase	623,400	1,129,503
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, estimated fair value	3,865,421	3,388,405
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits, estimated fair value	62,602,507	61,263,812
FHLB and other borrowings, estimated fair value	6,780,159	4,786,152
Federal funds purchased and securities sold under agreements to repurchase, estimated fair value	623,400	1,129,503
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity, estimated fair value	1,281,338	1,275,963
Loans, net, estimated fair value	56,569,439	54,551,442
Reported value measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	3,865,421	3,388,405
Investment securities held to maturity	1,375,075	1,348,354
Loans, net	59,285,755	56,686,743
Deposits	62,499,369	61,189,716
FHLB and other borrowings	6,778,066	4,809,843
Federal funds purchased and securities sold under agreements to repurchase	623,400	1,129,503
Estimate of fair value measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, estimated fair value	3,865,421	3,388,405
Investment securities held to maturity, estimated fair value	1,281,338	1,275,963
Loans, net, estimated fair value	56,569,439	54,551,442
Deposits, estimated fair value	62,602,507	61,263,812
FHLB and other borrowings, estimated fair value	6,780,159	4,786,152
Federal funds purchased and securities sold under agreements to repurchase, estimated fair value	$ 623,400	$ 1,129,503

Comprehensive Income (Details)

Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Comprehensive Income (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale, pretax	$ (43,935)	$ 40,454	$ 20,855	$ 81,416
Unrealized holding gains (losses) arising during period from securities available for sale, tax expense (benefit)	(19,124)	14,539	9,078	29,261
Unrealized holding gains (losses) arising during period from securities available for sale, after tax	(24,811)	25,915	11,777	52,155
Less: reclassification adjustment for net gains on sale of securities in net income, pretax	27,399	21,464	60,231	37,898
Less: reclassification adjustment for net gains on sale of securities in net income, tax expense (benefit)	11,927	7,712	26,219	13,620
Less: reclassification adjustment for net gains on sale of securities in net income, after tax	15,472	13,752	34,012	24,278
Net change in unrealized gains (losses) on securities available for sale, pretax	(71,334)	18,990	(39,376)	43,518
Net change in unrealized gains (losses) on securities available for sale, tax expense (benefit)	(31,051)	6,827	(17,141)	15,641
Net change in unrealized holding gains (losses) on securities available for sale	(40,283)	12,163	(22,235)	27,877
Change in unamortized net holding losses on investment securities held to maturity, pretax	3,531	2,694	6,673	7,468
Change in unamortized net holding losses on investment securities held to maturity, tax expense (benefit)	1,537	967	2,905	2,683
Change in unamortized net holding losses on investment securities held to maturity, after tax	1,994	1,727	3,768	4,785
Other Comprehensive Income (Loss), Non-credit Related Impairment on Investment Securities Held to Maturity, pretax	0	0	87	235
Other Comprehensive Income (Loss), Non-credit Related Impairment on Investment Securities Held to Maturity, tax expense (benefit)	0	0	38	84
Less: non-credit related impairment on investment securities held to maturity	0	0	49	151
Change in unamortized non-credit related impairment on investment securities held to maturity, pretax	456	369	732	754
Change in unamortized non-credit related impairment on investment securities held to maturity, tax expense (benefit)	198	132	318	271
Change in unamortized non-credit related impairment on investment securities held to maturity, after tax	258	237	414	483
Net change in unamortized holding losses on securities held to maturity, pretax	3,987	3,063	7,318	7,987
Net change in unamortized holding losses on securities held to maturity, tax expense (benefit)	1,735	1,099	3,185	2,870
Net change in unamortized holding losses on securities held to maturity	2,252	1,964	4,133	5,117
Unrealized holding gains (losses) arising during period from cash flow hedge instruments, pretax	1,795	(1,365)	5,441	(2,626)
Unrealized holding gains (losses) arising during period from cash flow hedge instruments, tax expense (benefit)	782	(490)	2,369	(944)
Unrealized holding gains (losses) arising during period from cash flow hedge instruments, after tax	1,013	(875)	3,072	(1,682)
Change in defined benefit plans, pretax	0	0	2,716	(2,672)
Change in defined benefit plans, tax expense (benefit)	0	0	1,001	(1,001)
Change in defined benefit plans, after tax	0	0	1,715	(1,671)
Other comprehensive income (loss), pretax	(65,552)	20,688	(23,901)	46,207
Other comprehensive income (loss), tax expense (benefit)	(28,534)	7,436	(10,586)	16,566
Other comprehensive income (loss), net of tax	$ (37,018)	$ 13,252	$ (13,315)	$ 29,641

Comprehensive Income - AOCI (De

Comprehensive Income - AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Comprehensive Income [Roll Forward]
Beginning balance			$ (51,357)	$ (87,936)
Other comprehensive income (loss) before reclassifications			16,412	49,215
Amounts reclassified from accumulated other comprehensive income (loss)			(29,727)	(19,574)
Other comprehensive income (loss), net of tax	$ (37,018)	$ 13,252	(13,315)	29,641
Ending balance	(64,672)	(58,295)	(64,672)	(58,295)
Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity
Accumulated Comprehensive Income [Roll Forward]
Beginning balance			4,469	(31,490)
Other comprehensive income (loss) before reclassifications			11,777	52,155
Amounts reclassified from accumulated other comprehensive income (loss)			(30,244)	(19,493)
Other comprehensive income (loss), net of tax			(18,467)	32,662
Ending balance	(13,998)	1,172	(13,998)	1,172
Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Accumulated Comprehensive Income [Roll Forward]
Beginning balance			(7,189)	(5,289)
Other comprehensive income (loss) before reclassifications			4,684	(2,789)
Amounts reclassified from accumulated other comprehensive income (loss)			(1,612)	1,107
Other comprehensive income (loss), net of tax			3,072	(1,682)
Ending balance	(4,117)	(6,971)	(4,117)	(6,971)
Defined Benefit Plan Adjustment
Accumulated Comprehensive Income [Roll Forward]
Beginning balance			(41,121)	(41,921)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			1,715	(1,671)
Other comprehensive income (loss), net of tax			1,715	(1,671)
Ending balance	(39,406)	(43,592)	(39,406)	(43,592)
Unamortized Impairment Losses on Investment Securities Held to Maturity
Accumulated Comprehensive Income [Roll Forward]
Beginning balance			(7,516)	(9,236)
Other comprehensive income (loss) before reclassifications			(49)	(151)
Amounts reclassified from accumulated other comprehensive income (loss)			414	483
Other comprehensive income (loss), net of tax			365	332
Ending balance	$ (7,151)	$ (8,904)	$ (7,151)	$ (8,904)

Comprehensive Income - Reclassi

Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest on investment securities held to maturity		$ 6,924	$ 7,003	$ 13,626	$ 14,249
Interest and fees on loans		531,394	520,516	1,075,236	1,029,022
Interest and fees on FHLB advances		(27,540)	(16,184)	(46,646)	(32,548)
Net income before income tax expense		184,766	143,705	378,315	302,199
Income tax (expense) benefit		(48,116)	(36,130)	(99,898)	(79,697)
Net income		136,650	107,575	278,417	222,502
Reclassification out of Accumulated Other Comprehensive Income \| Unrealized Gains on Securities Available for Sale and Transferred to Held to Maturity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	[1]	27,399	21,464	60,231	37,898
Interest on investment securities held to maturity	[1]	(3,531)	(2,694)	(6,673)	(7,468)
Net income before income tax expense	[1]	23,868	18,770	53,558	30,430
Income tax (expense) benefit	[1]	(10,390)	(6,745)	(23,314)	(10,937)
Net income	[1]	13,478	12,025	30,244	19,493
Reclassification out of Accumulated Other Comprehensive Income \| Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and fees on loans	[1]	3,526	1,212	6,339	1,824
Interest and fees on FHLB advances	[1]	(1,719)	(1,776)	(3,485)	(3,551)
Net income before income tax expense	[1]	1,807	(564)	2,854	(1,727)
Income tax (expense) benefit	[1]	(786)	203	(1,242)	620
Net income	[1]	1,021	(361)	1,612	(1,107)
Reclassification out of Accumulated Other Comprehensive Income \| Defined Benefit Plan Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic expense	[1],[2]	0	0	(2,716)	2,672
Income tax (expense) benefit	[1]	0	0	1,001	(1,001)
Net income	[1]	0	0	(1,715)	1,671
Reclassification out of Accumulated Other Comprehensive Income \| Unamortized Impairment Losses on Investment Securities Held to Maturity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest on investment securities held to maturity	[1]	(456)	(369)	(732)	(754)
Income tax (expense) benefit	[1]	198	132	318	271
Net income	[1]	$ (258)	$ (237)	$ (414)	$ (483)

[1]	Amounts in parentheses indicate debits to the consolidated statement of income.
[2]	These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 18, Benefit Plans, in the Notes to the December 31, 2014, Consolidated Financial Statements for additional details).

Supplemental Disclosure for S75

Supplemental Disclosure for Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Supplemental disclosures of cash flow information:
Interest paid	$ 176,360	$ 134,941
Net income taxes paid	76,448	28,025
Supplemental schedule of noncash investing and financing activities:
Transfer of loans and loans held for sale to OREO	9,229	11,614
Change in unrealized gain (loss) on available for sale securities	(39,376)	43,518
Issuance of restricted stock, net of cancellations	458	(1,060)
Business combinations:
Assets acquired	0	117,068
Liabilities assumed	$ 0	$ 18,329

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Segment Information (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net interest income	$ 491,982	$ 498,774	$ 1,001,011	$ 994,073
Allocated provision for loan losses	46,149	45,252	88,180	82,518
Noninterest income	258,569	235,445	507,839	454,773
Noninterest expense	519,636	545,262	1,042,355	1,064,129
Net income (loss) before income tax expense (benefit)	184,766	143,705	378,315	302,199
Income tax expense (benefit)	48,116	36,130	99,898	79,697
Net income	136,650	107,575	278,417	222,502
Less: net income attributable to noncontrolling interests	590	504	1,247	957
Net income attributable to shareholder	136,060	107,071	277,170	221,545
Average assets	87,865,950	76,004,941	86,484,229	74,689,351
Operating Segments \| Consumer and Commercial Banking
Segment Reporting Information [Line Items]
Net interest income	494,464	464,614	976,875	918,481
Allocated provision for loan losses	21,072	38,252	51,418	74,873
Noninterest income	192,596	173,768	368,930	348,025
Noninterest expense	426,040	429,214	851,399	859,138
Net income (loss) before income tax expense (benefit)	239,948	170,916	442,988	332,495
Income tax expense (benefit)	83,982	63,666	155,046	123,854
Net income	155,966	107,250	287,942	208,641
Less: net income attributable to noncontrolling interests	156	65	384	82
Net income attributable to shareholder	155,810	107,185	287,558	208,559
Average assets	53,620,135	49,120,763	53,115,618	48,454,875
Operating Segments \| Corporate and Investment Banking
Segment Reporting Information [Line Items]
Net interest income	39,078	35,429	78,963	67,506
Allocated provision for loan losses	6,275	8,294	17,248	9,304
Noninterest income	47,213	45,855	96,700	93,090
Noninterest expense	39,103	40,543	78,539	71,757
Net income (loss) before income tax expense (benefit)	40,913	32,447	79,876	79,535
Income tax expense (benefit)	14,319	12,086	27,957	29,627
Net income	26,594	20,361	51,919	49,908
Less: net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to shareholder	26,594	20,361	51,919	49,908
Average assets	12,955,832	7,270,019	12,398,186	6,846,662
Operating Segments \| Treasury
Segment Reporting Information [Line Items]
Net interest income	416	3,632	18,798	8,256
Allocated provision for loan losses	0	0	0	0
Noninterest income	29,336	25,755	63,192	47,768
Noninterest expense	4,930	3,397	10,027	7,037
Net income (loss) before income tax expense (benefit)	24,822	25,990	71,963	48,987
Income tax expense (benefit)	8,688	9,681	25,187	18,248
Net income	16,134	16,309	46,776	30,739
Less: net income attributable to noncontrolling interests	434	439	863	875
Net income attributable to shareholder	15,700	15,870	45,913	29,864
Average assets	14,188,771	12,738,181	13,882,551	12,537,345
Corporate, Non-Segment \| Corporate Support and Other
Segment Reporting Information [Line Items]
Net interest income	(41,976)	(4,901)	(73,625)	(170)
Allocated provision for loan losses	18,802	(1,294)	19,514	(1,659)
Noninterest income	(10,576)	(9,933)	(20,983)	(34,110)
Noninterest expense	49,563	72,108	102,390	126,197
Net income (loss) before income tax expense (benefit)	(120,917)	(85,648)	(216,512)	(158,818)
Income tax expense (benefit)	(58,873)	(49,303)	(108,292)	(92,032)
Net income	(62,044)	(36,345)	(108,220)	(66,786)
Less: net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to shareholder	(62,044)	(36,345)	(108,220)	(66,786)
Average assets	$ 7,101,212	$ 6,875,978	$ 7,087,874	$ 6,850,469

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014	Aug. 01, 2014	Mar. 16, 2012
Related Party Transaction [Line Items]
Securities purchased under agreements to resell	$ 462,544,000	$ 566,539,000
Securities sold under agreements to repurchase	52,375,000	435,684,000
BSI \| Line of Credit \| BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Due from related parties	150,000,000		$ 150,000,000
BSI \| Revolving Credit Facility \| Line of Credit \| BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Due from related parties				$ 420,000,000
BBVA
Related Party Transaction [Line Items]
Securities purchased under agreements to resell	2,554,000	97,970,000
Securities sold under agreements to repurchase	0	435,684,000
Derivatives designated as hedging instrument \| BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	595,000	1,693,000
Free-standing derivatives not designated as hedging instrument \| Free-standing derivative instruments – risk management and other purposes \| BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ (7,385,000)	$ 9,512,000