Bbva Usa Bancshares 10-Q9 Nov 162016 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2016	Oct. 31, 2016
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	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		222,950,751

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets:
Cash and due from banks	$ 4,054,423	$ 4,165,880
Federal funds sold, securities purchased under agreements to resell and interest bearing deposits	372,268	330,948
Cash and cash equivalents	4,426,691	4,496,828
Trading account assets	4,051,461	4,138,132
Investment securities available for sale	11,516,885	11,050,520
Investment securities held to maturity (fair value of $1,241,234 and $1,244,121 at September 30, 2016 and December 31, 2015, respectively)	1,240,850	1,322,676
Loans held for sale, at fair value	101,843	70,582
Loans	60,211,283	61,324,084
Allowance for loan losses	(862,080)	(762,673)
Net loans	59,349,203	60,561,411
Premises and equipment, net	1,287,457	1,322,378
Bank owned life insurance	712,422	700,285
Goodwill	5,043,197	5,043,197
Other intangible assets	19,296	31,576
Other real estate owned	21,670	20,862
Other assets	1,585,863	1,310,091
Total assets	89,356,838	90,068,538
Deposits:
Noninterest bearing	20,585,598	19,291,533
Interest bearing	47,001,739	46,690,233
Total deposits	67,587,337	65,981,766
FHLB and other borrowings	3,671,861	5,438,620
Federal funds purchased and securities sold under agreements to repurchase	165,573	750,154
Other short-term borrowings	3,591,223	4,032,644
Accrued expenses and other liabilities	1,521,654	1,240,645
Total liabilities	76,537,648	77,443,829
Shareholder’s Equity:
Series A Preferred stock, $.0.01 par value, liquidation preference $200,000 per share, authorized - 30,000,000 shares, issued - 1,150 at both September 30, 2016 and December 31, 2015	229,475	229,475
Common stock - $0.01 par value; authorized - 300,000,000 shares, issued - 222,950,751 shares at both September 30, 2016 and December 31, 2015	2,230	2,230
Surplus	15,020,937	15,160,267
Accumulated deficit	(2,416,402)	(2,696,953)
Accumulated other comprehensive loss	(46,644)	(99,336)
Total BBVA Compass Bancshares, Inc. shareholder’s equity	12,789,596	12,595,683
Noncontrolling interests	29,594	29,026
Total shareholder’s equity	12,819,190	12,624,709
Total liabilities and shareholder’s equity	$ 89,356,838	$ 90,068,538

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) Parenthetical - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Investment securities held to maturity, estimated fair value	$ 1,241,234	$ 1,244,121
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 200,000	$ 200,000
Preferred stock, number of shares authorized	30,000,000	30,000,000
Preferred stock, number of shares issued	1,150	1,150
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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income:
Interest and fees on loans	$ 557,996	$ 540,517	$ 1,678,249	$ 1,615,753
Interest on investment securities available for sale	48,382	46,646	131,021	143,058
Interest on investment securities held to maturity	6,675	6,953	20,229	20,579
Interest on federal funds sold, securities purchased under agreements to resell and interest bearing deposits	4,563	1,666	13,275	4,027
Interest on trading account assets	12,926	14,431	40,659	37,877
Total interest income	630,542	610,213	1,883,433	1,821,294
Interest expense:
Interest on deposits	76,031	68,282	230,779	203,136
Interest on FHLB and other borrowings	21,315	20,422	58,919	67,068
Interest on federal funds purchased and securities sold under agreements to repurchase	4,934	2,506	16,525	5,534
Interest on other short-term borrowings	13,453	11,129	41,281	36,668
Total interest expense	115,733	102,339	347,504	312,406
Net interest income	514,809	507,874	1,535,929	1,508,888
Provision for loan losses	65,107	29,151	265,025	117,331
Net interest income after provision for loan losses	449,702	478,723	1,270,904	1,391,557
Noninterest income:
Service charges on deposit accounts	55,047	54,917	158,393	161,891
Card and merchant processing fees	31,256	29,024	92,507	83,918
Investment banking and advisory fees	34,385	17,842	86,324	84,975
Money transfer income	25,058	24,868	75,960	68,702
Retail investment sales	30,137	26,055	79,689	77,574
Asset management fees	8,778	7,918	25,969	24,449
Corporate and correspondent investment sales	6,974	6,047	21,490	20,290
Mortgage banking	8,242	554	5,410	21,269
Bank owned life insurance	4,170	4,345	13,041	13,527
Investment securities gains, net	0	6,736	30,037	66,967
Loss on prepayment of FHLB and other borrowings, net	0	0	0	(6,118)
Other	59,718	82,414	206,396	199,732
Total noninterest income	263,765	260,720	795,216	817,176
Noninterest expense:
Salaries, benefits and commissions	279,132	271,143	836,067	804,828
Equipment	59,697	58,414	179,646	174,311
Professional services	63,628	55,476	178,396	154,134
Net occupancy	41,610	39,706	120,881	119,731
Money transfer expense	16,680	16,514	50,048	44,016
Amortization of intangibles	4,093	9,507	12,280	30,083
Securities impairment:
Other-than-temporary impairment	0	0	281	1,385
Less: non-credit portion recognized in other comprehensive income	0	0	151	87
Securities impairment	0	0	130	1,298
Other	91,431	106,615	312,004	307,757
Total noninterest expense	556,271	557,375	1,689,452	1,636,158
Net income before income tax expense	157,196	182,068	376,668	572,575
Income tax expense	36,845	52,428	94,548	156,865
Net income	120,351	129,640	282,120	415,710
Less: net income attributable to noncontrolling interests	523	491	1,569	1,738
Net income attributable to BBVA Compass Bancshares, Inc.	119,828	129,149	280,551	413,972
Less: preferred stock dividends	3,476	0	10,148	0
Net income attributable to common shareholder	$ 116,352	$ 129,149	$ 270,403	$ 413,972

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 120,351	$ 129,640	$ 282,120	$ 415,710
Other comprehensive income, net of tax:
Unrealized holding (losses) gains arising during period from securities available for sale	(26,076)	27,493	65,592	39,270
Less: reclassification adjustment for net gains on sale of securities available for sale in net income	0	3,804	19,035	37,816
Net change in unrealized holding gains (losses) on securities available for sale	(26,076)	23,689	46,557	1,454
Change in unamortized net holding losses on investment securities held to maturity	1,168	1,066	2,924	4,834
Less: non-credit related impairment on investment securities held to maturity	0	0	96	49
Change in unamortized non-credit related impairment on investment securities held to maturity	225	290	648	704
Net change in unamortized holding losses on securities held to maturity	1,393	1,356	3,476	5,489
Unrealized holding (losses) gains arising during period from cash flow hedge instruments	(1,461)	2,042	1,728	5,322
Change in defined benefit plans	0	0	931	1,715
Other comprehensive (loss) income, net of tax	(26,144)	27,087	52,692	13,980
Comprehensive income	94,207	156,727	334,812	429,690
Less: comprehensive income attributable to noncontrolling interests	523	491	1,569	1,738
Comprehensive income attributable to BBVA Compass Bancshares, Inc.	$ 93,684	$ 156,236	$ 333,243	$ 427,952

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Shareholder's Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Surplus	Accumulated Deficit	Accumulated Other Comprehensive Loss	Non-Controlling Interests
Balance, beginning of period at Dec. 31, 2014	$ 12,054,922		$ 2,230	$ 15,277,746	$ (3,202,083)	$ (51,862)	$ 28,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	415,710				413,972		1,738
Other comprehensive income, net of tax	13,980					13,980
Preferred stock dividends	(1,037)						(1,037)
Common stock dividends	(35,000)			(35,000)
Vesting of restricted stock	(3,603)			(3,603)
Restricted stock retained to cover taxes	(3,016)			(3,016)
Amortization of stock-based deferred compensation	1,772			1,772
Balance, end of period at Sep. 30, 2015	12,443,728		2,230	15,237,899	(2,788,111)	(37,882)	29,592
Balance, beginning of period at Dec. 31, 2015	12,624,709	$ 229,475	2,230	15,160,267	(2,696,953)	(99,336)	29,026
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	282,120				280,551		1,569
Other comprehensive income, net of tax	52,692					52,692
Preferred stock dividends	(11,185)			(10,148)			(1,037)
Common stock dividends	(60,000)			(60,000)
Dividend to BBVA Bancomer USA, Inc.	(69,151)			(69,151)
Capital contribution	36						36
Vesting of restricted stock	(1,527)			(1,527)
Restricted stock retained to cover taxes	(545)			(545)
Restricted stock tax benefit	(468)			(468)
Amortization of stock-based deferred compensation	2,509			2,509
Balance, end of period at Sep. 30, 2016	$ 12,819,190	$ 229,475	$ 2,230	$ 15,020,937	$ (2,416,402)	$ (46,644)	$ 29,594

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities:
Net income	$ 282,120	$ 415,710
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	221,975	206,882
Securities impairment	130	1,298
Amortization of intangibles	12,280	30,083
Accretion of discount, loan fees and purchase market adjustments, net	(17,191)	(84,168)
Net change in FDIC indemnification liability	4,180	49,669
Provision for loan losses	265,025	117,331
Amortization of stock based compensation	2,509	1,772
Net change in trading account assets	(369,690)	(153,297)
Net change in trading account liabilities	210,554	80,378
Net change in loans held for sale	(27,468)	32,058
Deferred tax benefit	(22,596)	(9,686)
Investment securities gains, net	(30,037)	(66,967)
Loss on prepayment of FHLB and other borrowings, net	0	6,118
Loss on sale of premises and equipment	5,019	151
Gain on sale of loans	(15,551)	(21,086)
Net (gain) loss on sale of other real estate and other assets	(406)	500
(Increase) decrease in other assets	(260,823)	20,424
Increase (decrease) in other liabilities	68,043	(125,524)
Net cash provided by operating activities	328,073	501,646
Investing Activities:
Proceeds from sales of investment securities available for sale	1,785,313	2,877,744
Proceeds from prepayments, maturities and calls of investment securities available for sale	1,629,841	1,225,031
Purchases of investment securities available for sale	(3,848,779)	(4,662,585)
Proceeds from prepayments, maturities and calls of investment securities held to maturity	114,689	82,163
Purchases of investment securities held to maturity	(27,104)	(82,634)
Proceeds from sales of trading securities	729,218	2,871,708
Purchases of trading securities	(272,857)	(4,077,520)
Net change in loan portfolio	(66,962)	(3,853,782)
Proceeds from sales of loans	1,022,579	436,242
Purchase of premises and equipment	(112,419)	(103,165)
Proceeds from sale of premises and equipment	6,311	7,974
Net cash paid in acquisition	0	(12,567)
Reimbursements from FDIC for covered assets	878	818
Proceeds from sales of other real estate owned	21,145	12,890
Net cash provided by (used in) investing activities	981,853	(5,277,683)
Financing Activities:
Net increase in demand deposits, NOW accounts and savings accounts	1,380,456	2,527,448
Net increase in time deposits	215,262	767,539
Net decrease in federal funds purchased and securities sold under agreements to repurchase	(584,581)	(490,244)
Net (decrease) increase in other short-term borrowings	(441,421)	1,622,173
Proceeds from FHLB and other borrowings	1,250,000	4,000,000
Repayment of FHLB and other borrowings	(3,057,407)	(2,612,915)
Capital contribution for non-controlling interest	36	0
Vesting of restricted stock	(1,527)	(3,603)
Restricted stock grants retained to cover taxes	(545)	(3,016)
Dividend paid to BBVA Bancomer USA, Inc.	(69,151)	0
Common dividends paid	(60,000)	(35,000)
Preferred dividends paid	(11,185)	(1,037)
Net cash (used in) provided by financing activities	(1,380,063)	5,771,345
Net (decrease) increase in cash and cash equivalents	(70,137)	995,308
Cash and cash equivalents at beginning of year	4,496,828	3,432,948
Cash and cash equivalents at end of period	$ 4,426,691	$ 4,428,256

Basis of Presentation

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2016
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 condensed consolidated 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 condensed consolidated financial statements have been included. Operating results for the three and nine months ended September 30, 2016 , are not necessarily indicative of the results that may be expected for the year ended December 31, 2016 . 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, 2015 . 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 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 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 and its selection of transition method. Because the guidance does not apply to revenue associated with financial instruments, including loans and securities accounted for under other U.S. GAAP, the Company does not expect the new revenue recognition guidance to have a material impact on the elements of its statement of income most closely associated with financial instruments, including securities gains, interest income and interest expense. The Company plans to adopt this standard in the first quarter of 2018. 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 were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard did not 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 were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard did not 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 were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. Recognition and Measurement of Financial Assets and Liabilities In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Liabilities . The amendments in this ASU revise an entity's accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. The ASU also amends certain disclosure requirements associated with the fair value of financial instruments. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted for the presentation of certain fair value changes for financial liabilities measured at fair value. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Leases In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The FASB issued this ASU to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet by lessees for those leases classified as operating leases under current U.S. GAAP and disclosing key information about leasing arrangements. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of this ASU is permitted for all entities. 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. Stock Compensation In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting . The FASB issued this ASU to improve the accounting for share-based payment transactions as part of its simplification initiative. The areas for simplification in this ASU involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Credit Losses In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses , which introduces new guidance for the accounting for credit losses on instruments within its scope. The new guidance introduces an approach based on expected losses to estimate credit losses on certain types of financial instruments. It also modifies the impairment model for AFS debt securities and provides for a simplified accounting model for purchased financial assets with credit deterioration since their origination. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2019. Early application of this ASU is permitted. 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. Statement of Cash Flows In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments , which provides guidance on eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early application of this ASU is permitted. The Company is currently assessing the impact that the adoption of this standard will have on the Statements of Cash Flows of the Company.

Acquisition Activity

Acquisition Activity	9 Months Ended
Acquisition Activity	Sep. 30, 2016
Business Combinations [Abstract]
Acquisition Activity	Acquisition Activity On June 6, 2016, the Parent completed the purchase of four subsidiaries (Bancomer Transfer Services, Bancomer Payment Services, Bancomer Foreign Exchange, and Bancomer Financial Services) from BBVA Bancomer USA, Inc. BBVA Bancomer USA, Inc. is a wholly-owned U.S. subsidiary of BBVA Bancomer, S.A., Mexico City, Mexico and ultimately a wholly-owned subsidiary of BBVA. These four subsidiaries engage in money transmission and foreign exchange services and are subsidiaries of BBVA Compass Payments, Inc., a wholly owned subsidiary of the Parent. The transaction was structured as a cash purchase totaling $69.2 million . At December 31, 2015 , the four subsidiaries had total assets of approximately $103 million . Because the Company and the acquired subsidiaries are under common control of the ultimate parent, BBVA, this transaction was accounted for in a manner similar to the pooling-of-interest method, which requires the merged entities be combined at their historical cost. The difference between the net carrying amount of the four subsidiaries and the total consideration paid to BBVA Bancomer USA, Inc. was recorded as a capital transaction and is reflected as a dividend to BBVA Bancomer USA, Inc. in the Unaudited Condensed Consolidated Statements of Shareholder's Equity. The Company's consolidated financial statements and related footnotes are presented as if the transaction occurred at the beginning of the earliest date presented and the prior periods have been retrospectively adjusted. The following table summarizes the impact of the acquisition to certain captions within the Company's Unaudited Condensed Consolidated Balance Sheet as of December 31, 2015 and the Company's Unaudited Condensed Consolidated Income Statement for the three and nine months ended September 30, 2015 . Balance Sheet As Previously Reported Retrospective Adjustments As Retrospectively Adjusted (In Thousands) December 31, 2015 Assets: Cash and cash equivalents $ 4,452,892 $ 43,936 $ 4,496,828 Premises and equipment, net 1,320,163 2,215 1,322,378 Other assets 1,252,784 57,307 1,310,091 Total assets 89,965,080 103,458 90,068,538 Liabilities: Deposits $ 65,980,530 $ 1,236 $ 65,981,766 Accrued expenses and other liabilities 1,185,848 54,797 1,240,645 Total liabilities 77,387,796 56,033 77,443,829 Shareholder’s equity 12,577,284 47,425 12,624,709 Total liabilities and shareholder’s equity 89,965,080 103,458 90,068,538 Income Statement As Previously Reported Retrospective Adjustments As Retrospectively Adjusted (In Thousands) Three Months Ended September 30, 2015 Interest income $ 610,206 $ 7 $ 610,213 Noninterest income 233,376 27,344 260,720 Noninterest expense 536,250 21,125 557,375 Income tax expense 50,110 2,318 52,428 Net income 125,732 3,908 129,640 Nine Months Ended September 30, 2015 Interest income $ 1,821,284 $ 10 $ 1,821,294 Noninterest income 741,215 75,961 817,176 Noninterest expense 1,578,605 57,553 1,636,158 Income tax expense 150,008 6,857 156,865 Net income 404,149 11,561 415,710 Additionally, the Unaudited Condensed Consolidated Statements of Comprehensive Income, Shareholder's Equity and Cash Flows along with Footnotes 6, 9, 10, 12, and 13 have been adjusted to reflect these retrospective adjustments.

Investment Securities Available

Investment Securities Available for Sale and Investment Securities Held to Maturity	9 Months Ended
	Sep. 30, 2016
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. September 30, 2016 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 $ 1,856,178 $ 10,178 $ 16,126 $ 1,850,230 Mortgage-backed securities 3,988,469 36,732 19,564 4,005,637 Collateralized mortgage obligations 5,207,807 18,842 19,432 5,207,217 States and political subdivisions 9,787 288 — 10,075 Other 16,528 356 32 16,852 Equity securities 426,826 48 — 426,874 Total $ 11,505,595 $ 66,444 $ 55,154 $ 11,516,885 Investment securities held to maturity: Collateralized mortgage obligations $ 88,611 $ 4,733 $ 5,460 $ 87,884 Asset-backed securities 17,144 1,959 1,465 17,638 States and political subdivisions 1,070,917 17,667 16,516 1,072,068 Other 64,178 1,417 1,951 63,644 Total $ 1,240,850 $ 25,776 $ 25,392 $ 1,241,234 December 31, 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 $ 3,232,238 $ 4,076 $ 24,822 $ 3,211,492 Mortgage-backed securities 4,624,441 16,548 50,727 4,590,262 Collateralized mortgage obligations 2,713,075 8,200 16,019 2,705,256 States and political subdivisions 15,492 395 — 15,887 Other 23,914 175 44 24,045 Equity securities 503,540 38 — 503,578 Total $ 11,112,700 $ 29,432 $ 91,612 $ 11,050,520 Investment securities held to maturity: Collateralized mortgage obligations $ 103,947 $ 6,022 $ 4,634 $ 105,335 Asset-backed securities 24,011 3,002 1,574 25,439 States and political subdivisions 1,128,240 729 82,632 1,046,337 Other 66,478 2,644 2,112 67,010 Total $ 1,322,676 $ 12,397 $ 90,952 $ 1,244,121 In the above table, equity securities include $427 million and $503 million at September 30, 2016 and December 31, 2015 , 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 September 30, 2016 and December 31, 2015 . This information is aggregated by investment category and the length of time the individual securities have been in an unrealized loss position. September 30, 2016 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 $ 386,626 $ 4,012 $ 604,317 $ 12,114 $ 990,943 $ 16,126 Mortgage-backed securities 301,922 2,182 1,502,080 17,382 1,804,002 19,564 Collateralized mortgage obligations 2,319,508 13,007 704,501 6,425 3,024,009 19,432 Other — — 1,090 32 1,090 32 Total $ 3,008,056 $ 19,201 $ 2,811,988 $ 35,953 $ 5,820,044 $ 55,154 Investment securities held to maturity: Collateralized mortgage obligations $ 4,099 $ 519 $ 50,858 $ 4,941 $ 54,957 $ 5,460 Asset-backed securities 425 14 9,964 1,451 10,389 1,465 States and political subdivisions 57,577 4,378 325,680 12,138 383,257 16,516 Other 16,504 94 3,538 1,857 20,042 1,951 Total $ 78,605 $ 5,005 $ 390,040 $ 20,387 $ 468,645 $ 25,392 December 31, 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 $ 2,081,528 $ 16,523 $ 460,160 $ 8,299 $ 2,541,688 $ 24,822 Mortgage-backed securities 2,623,761 20,380 1,408,069 30,347 4,031,830 50,727 Collateralized mortgage obligations 1,321,121 10,378 393,210 5,641 1,714,331 16,019 Other — — 1,078 44 1,078 44 Total $ 6,026,410 $ 47,281 $ 2,262,517 $ 44,331 $ 8,288,927 $ 91,612 Investment securities held to maturity: Collateralized mortgage obligations $ 11,066 $ 326 $ 52,601 $ 4,308 $ 63,667 $ 4,634 Asset-backed securities — — 15,790 1,574 15,790 1,574 States and political subdivisions 73,302 6,533 794,489 76,099 867,791 82,632 Other — — 4,015 2,112 4,015 2,112 Total $ 84,368 $ 6,859 $ 866,895 $ 84,093 $ 951,263 $ 90,952 As indicated in the previous tables, at September 30, 2016 , 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 September 30, 2016 or December 31, 2015 , 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 Nine Months Ended 2016 2015 2016 2015 (In Thousands) Balance at beginning of period $ 22,582 $ 22,421 $ 22,452 $ 21,123 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 Additions for the credit component on debt securities in which OTTI was previously recognized — — 130 285 Balance at end of period $ 22,582 $ 22,421 $ 22,582 $ 22,421 For both the three months ended September 30, 2016 and 2015 , there was no OTTI recognized on held to maturity securities. For the nine months ended September 30, 2016 and 2015 , there was $130 thousand and $1.3 million , 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. The contractual maturities of the securities portfolios are presented in the following table. September 30, 2016 Amortized Cost Fair Value (In Thousands) Investment securities available for sale: Maturing within one year $ 91,838 $ 91,868 Maturing after one but within five years 365,562 369,917 Maturing after five but within ten years 367,002 370,969 Maturing after ten years 1,058,091 1,044,403 1,882,493 1,877,157 Mortgage-backed securities and collateralized mortgage obligations 9,196,276 9,212,854 Equity securities 426,826 426,874 Total $ 11,505,595 $ 11,516,885 Investment securities held to maturity: Maturing within one year $ 67,853 $ 68,283 Maturing after one but within five years 244,188 243,803 Maturing after five but within ten years 260,272 258,962 Maturing after ten years 579,926 582,302 1,152,239 1,153,350 Collateralized mortgage obligations 88,611 87,884 Total $ 1,240,850 $ 1,241,234 The gross realized gains and losses recognized on sales of investment securities available for sale are shown in the table below. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Gross gains $ — $ 8,568 $ 30,037 $ 68,799 Gross losses — 1,832 — 1,832 Net realized gains $ — $ 6,736 $ 30,037 $ 66,967

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
Loans and Allowance for Loan Losses	Sep. 30, 2016
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses The following table presents the composition of the loan portfolio. September 30, 2016 December 31, 2015 (In Thousands) Commercial loans: Commercial, financial and agricultural $ 24,839,068 $ 26,022,374 Real estate – construction 2,215,272 2,354,253 Commercial real estate – mortgage 11,361,630 10,453,280 Total commercial loans 38,415,970 38,829,907 Consumer loans: Residential real estate – mortgage 13,457,435 13,993,285 Equity lines of credit 2,494,468 2,419,815 Equity loans 479,375 580,804 Credit card 599,862 627,359 Consumer direct 1,186,827 936,871 Consumer indirect 3,196,235 3,495,082 Total consumer loans 21,414,202 22,053,216 Covered loans 381,111 440,961 Total loans $ 60,211,283 $ 61,324,084 At September 30, 2016 , the Company considered its energy lending portfolio as a concentration due to the impact on this portfolio of declining oil prices that began in late 2014 and continued into 2016. Total energy exposure, including unused commitments to extend credit and letters of credit was $8.2 billion and $9.4 billion at September 30, 2016 and December 31, 2015 , respectively. The funded amount of the Company's energy lending portfolio was approximately $3.3 billion and $3.8 billion at September 30, 2016 and December 31, 2015 , respectively, and is reported in total commercial, financial and agricultural in the table above. The decline in oil prices has negatively impacted the financial results of many borrowers in the energy lending portfolio, leading to internal risk rating downgrades. If oil prices remain unstable or resume their decline, the energy-related portfolio may be subject to additional pressure on credit quality metrics including past due, criticized, and nonperforming loans, as well as net charge-offs. 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 (In Thousands) Three months ended September 30, 2016 Allowance for loan losses: Beginning balance $ 499,398 $ 114,311 $ 119,076 $ 110,266 $ — $ 843,051 Provision (credit) for loan losses 20,533 54 528 43,992 — 65,107 Loans charged off (13,702 ) (104 ) (4,608 ) (46,472 ) — (64,886 ) Loan recoveries 4,766 682 3,429 9,931 — 18,808 Net (charge-offs) recoveries (8,936 ) 578 (1,179 ) (36,541 ) — (46,078 ) Ending balance $ 510,995 $ 114,943 $ 118,425 $ 117,717 $ — $ 862,080 Three months ended September 30, 2015 Allowance for loan losses: Beginning balance $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Provision (credit) for loan losses 16,424 (7,256 ) (577 ) 20,091 469 29,151 Loans charged off (9,161 ) (910 ) (5,944 ) (27,567 ) (490 ) (44,072 ) Loan recoveries 5,171 899 3,772 5,728 2 15,572 Net (charge-offs) recoveries (3,990 ) (11 ) (2,172 ) (21,839 ) (488 ) (28,500 ) Ending balance $ 363,313 $ 127,885 $ 131,246 $ 97,811 $ 1,867 $ 722,122 Nine Months Ended September 30, 2016 Allowance for loan losses: Beginning balance $ 402,113 $ 122,068 $ 132,104 $ 104,948 $ 1,440 $ 762,673 Provision (credit) for loan losses 167,648 (7,393 ) (7,412 ) 112,058 124 265,025 Loans charged off (66,541 ) (3,555 ) (15,072 ) (125,607 ) (1,565 ) (212,340 ) Loan recoveries 7,775 3,823 8,805 26,318 1 46,722 Net (charge-offs) recoveries (58,766 ) 268 (6,267 ) (99,289 ) (1,564 ) (165,618 ) Ending balance $ 510,995 $ 114,943 $ 118,425 $ 117,717 $ — $ 862,080 Nine Months Ended September 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 74,127 (12,995 ) (13,458 ) 69,085 572 117,331 Loans charged off (20,706 ) (2,380 ) (20,889 ) (78,957 ) (1,516 ) (124,448 ) Loan recoveries 10,410 5,027 10,966 17,792 3 44,198 Net (charge-offs) recoveries (10,296 ) 2,647 (9,923 ) (61,165 ) (1,513 ) (80,250 ) Ending balance $ 363,313 $ 127,885 $ 131,246 $ 97,811 $ 1,867 $ 722,122 (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 (In Thousands) September 30, 2016 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 138,067 $ 3,253 $ 35,867 $ 2,507 $ — $ 179,694 Collectively evaluated for impairment 372,928 111,690 82,558 115,210 — 682,386 Purchased loans — — — — — — Total allowance for loan losses $ 510,995 $ 114,943 $ 118,425 $ 117,717 $ — $ 862,080 Ending balance of loans: Individually evaluated for impairment $ 839,679 $ 38,967 $ 180,308 $ 3,393 $ — $ 1,062,347 Collectively evaluated for impairment 23,972,927 13,503,337 16,250,039 4,975,230 — 58,701,533 Purchased loans 26,462 34,598 931 4,301 381,111 447,403 Total loans $ 24,839,068 $ 13,576,902 $ 16,431,278 $ 4,982,924 $ 381,111 $ 60,211,283 December 31, 2015 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 27,486 $ 3,725 $ 38,126 $ 1,880 $ — $ 71,217 Collectively evaluated for impairment 374,458 118,343 93,978 103,068 — 689,847 Purchased loans 169 — — — 1,440 1,609 Total allowance for loan losses $ 402,113 $ 122,068 $ 132,104 $ 104,948 $ 1,440 $ 762,673 Ending balance of loans: Individually evaluated for impairment $ 163,201 $ 80,123 $ 183,473 $ 2,789 $ — $ 429,586 Collectively evaluated for impairment 25,828,286 12,685,320 16,809,525 5,051,488 — 60,374,619 Purchased loans 30,887 42,090 906 5,035 440,961 519,879 Total loans $ 26,022,374 $ 12,807,533 $ 16,993,904 $ 5,059,312 $ 440,961 $ 61,324,084 (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 tables present information on individually evaluated impaired loans, by loan class. September 30, 2016 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 $ 420,005 $ 428,688 $ — $ 419,674 $ 445,592 $ 138,067 Real estate – construction — — — 707 819 377 Commercial real estate – mortgage 15,161 15,765 — 23,099 24,498 2,876 Residential real estate – mortgage — — — 111,773 111,773 9,226 Equity lines of credit — — — 25,679 26,069 20,572 Equity loans — — — 42,856 43,563 6,069 Credit card — — — — — — Consumer direct — — — 797 797 56 Consumer indirect — — — 2,596 2,596 2,451 Total loans $ 435,166 $ 444,453 $ — $ 627,181 $ 655,707 $ 179,694 December 31, 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 $ 45,583 $ 53,325 $ — $ 117,618 $ 122,148 $ 27,486 Real estate – construction 3,403 3,986 — 628 689 515 Commercial real estate – mortgage 24,851 27,486 — 51,241 54,863 3,210 Residential real estate – mortgage 6,521 6,521 — 102,375 102,375 7,370 Equity lines of credit — — — 28,164 30,302 23,183 Equity loans — — — 46,413 47,245 7,573 Credit card — — — — — — Consumer direct — — — 935 935 26 Consumer indirect — — — 1,854 1,854 1,854 Total loans $ 80,358 $ 91,318 $ — $ 349,228 $ 360,411 $ 71,217 The following tables present information on individually evaluated impaired loans, by loan class. Three Months Ended September 30, 2016 Three Months Ended September 30, 2015 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 769,719 $ 401 $ 133,652 $ 204 Real estate – construction 634 2 5,360 21 Commercial real estate – mortgage 36,874 255 87,352 517 Residential real estate – mortgage 110,262 666 107,927 707 Equity lines of credit 26,231 246 27,185 279 Equity loans 43,292 375 48,046 392 Credit card — — — — Consumer direct 803 7 397 4 Consumer indirect 2,505 3 1,749 — Total loans $ 990,320 $ 1,955 $ 411,668 $ 2,124 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 575,038 $ 1,033 $ 98,110 $ 909 Real estate – construction 2,118 6 5,837 97 Commercial real estate – mortgage 46,073 932 85,862 1,634 Residential real estate – mortgage 109,020 1,953 110,790 2,096 Equity lines of credit 27,170 790 26,891 838 Equity loans 44,629 1,123 50,168 1,197 Credit card — — — — Consumer direct 854 22 686 12 Consumer indirect 2,152 9 1,645 — Total loans $ 807,054 $ 5,868 $ 379,989 $ 6,783 The tables above do not include Purchased Impaired Loans, Purchased Nonimpaired Loans or loans held for sale. 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, 2015 . 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, through internally assigned letter grades (AAA through D2) 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 September 30, 2016 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Pass $ 22,686,955 $ 2,154,286 $ 11,031,439 Special Mention 665,237 56,486 209,917 Substandard 1,164,997 4,485 102,879 Doubtful 321,879 15 17,395 $ 24,839,068 $ 2,215,272 $ 11,361,630 December 31, 2015 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Pass $ 24,823,312 $ 2,340,145 $ 10,165,630 Special Mention 469,400 5,148 142,124 Substandard 688,427 8,941 133,091 Doubtful 41,235 19 12,435 $ 26,022,374 $ 2,354,253 $ 10,453,280 Consumer September 30, 2016 Residential Real Estate – Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 13,335,843 $ 2,459,409 $ 465,626 $ 589,687 $ 1,181,871 $ 3,182,146 Nonperforming 121,592 35,059 13,749 10,175 4,956 14,089 $ 13,457,435 $ 2,494,468 $ 479,375 $ 599,862 $ 1,186,827 $ 3,196,235 December 31, 2015 Residential Real Estate -Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 13,877,592 $ 2,381,909 $ 564,110 $ 617,641 $ 932,773 $ 3,484,426 Nonperforming 115,693 37,906 16,694 9,718 4,098 10,656 $ 13,993,285 $ 2,419,815 $ 580,804 $ 627,359 $ 936,871 $ 3,495,082 The following tables present an aging analysis of the Company’s past due loans, excluding loans classified as held for sale. September 30, 2016 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 $ 72,328 $ 4,400 $ 5,320 $ 850,075 $ 9,283 $ 941,406 $ 23,897,662 $ 24,839,068 Real estate – construction 522 1,062 2,782 1,214 3,315 8,895 2,206,377 2,215,272 Commercial real estate – mortgage 7,614 369 783 63,593 5,141 77,500 11,284,130 11,361,630 Residential real estate – mortgage 56,204 21,200 3,929 117,243 63,008 261,584 13,195,851 13,457,435 Equity lines of credit 8,173 4,477 2,417 32,642 — 47,709 2,446,759 2,494,468 Equity loans 5,567 1,694 353 13,198 36,053 56,865 422,510 479,375 Credit card 5,696 4,264 10,175 — — 20,135 579,727 599,862 Consumer direct 12,099 4,725 4,191 765 759 22,539 1,164,288 1,186,827 Consumer indirect 73,045 20,165 7,070 7,019 — 107,299 3,088,936 3,196,235 Covered loans 4,075 3,844 28,505 269 — 36,693 344,418 381,111 Total loans $ 245,323 $ 66,200 $ 65,525 $ 1,086,018 $ 117,559 $ 1,580,625 $ 58,630,658 $ 60,211,283 December 31, 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 $ 8,197 $ 4,215 $ 3,567 $ 161,591 $ 9,402 $ 186,972 $ 25,835,402 $ 26,022,374 Real estate – construction 2,864 91 421 5,908 2,247 11,531 2,342,722 2,354,253 Commercial real estate – mortgage 3,843 1,461 2,237 69,953 33,904 111,398 10,341,882 10,453,280 Residential real estate – mortgage 47,323 19,540 1,961 113,234 67,343 249,401 13,743,884 13,993,285 Equity lines of credit 8,263 4,371 2,883 35,023 — 50,540 2,369,275 2,419,815 Equity loans 6,356 2,194 704 15,614 37,108 61,976 518,828 580,804 Credit card 5,563 4,622 9,718 — — 19,903 607,456 627,359 Consumer direct 7,648 3,801 3,537 561 908 16,455 920,416 936,871 Consumer indirect 73,438 17,167 5,629 5,027 — 101,261 3,393,821 3,495,082 Covered loans 4,862 3,454 37,972 134 — 46,422 394,539 440,961 Total loans $ 168,357 $ 60,916 $ 68,629 $ 407,045 $ 150,912 $ 855,859 $ 60,468,225 $ 61,324,084 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, 2015 . 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. September 30, 2016 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 $ — $ — $ 28,739 $ 28,772 $ 9,250 $ 38,022 Real estate – construction — — — 585 585 3,315 3,900 Commercial real estate – mortgage — — — 4,136 4,136 5,141 9,277 Residential real estate – mortgage 3,392 389 420 35,562 39,763 58,807 98,570 Equity lines of credit — — — 24,507 24,507 — 24,507 Equity loans 1,837 766 198 7,066 9,867 33,252 43,119 Credit card — — — — — — — Consumer direct — — — 37 37 759 796 Consumer indirect — — — 2,597 2,597 — 2,597 Covered loans — — — 27 27 — 27 Total loans $ 5,262 $ 1,155 $ 618 $ 103,256 $ 110,291 $ 110,524 $ 220,815 December 31, 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 $ — $ — $ — $ 131 $ 131 $ 9,402 $ 9,533 Real estate – construction — — — 495 495 2,247 2,742 Commercial real estate – mortgage — — — 7,205 7,205 33,904 41,109 Residential real estate – mortgage 2,188 1,935 498 30,174 34,795 62,722 97,517 Equity lines of credit — — — 27,176 27,176 — 27,176 Equity loans 1,737 782 376 9,844 12,739 34,213 46,952 Credit card — — — — — — — Consumer direct — — — 27 27 908 935 Consumer indirect — — — 1,853 1,853 — 1,853 Covered loans — — — 8 8 — 8 Total loans $ 3,925 $ 2,717 $ 874 $ 76,913 $ 84,429 $ 143,396 $ 227,825 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 September 30, 2016 , $1.2 million of TDR modifications included an interest rate concession and $36.5 million of TDR modifications resulted from modifications to the loan’s structure. During the three months ended September 30, 2015 , $2.0 million of TDR modifications included an interest rate concession and $4.7 million of TDR modifications resulted from modifications to the loan’s structure. During the nine months ended September 30, 2016 , $4.2 million of TDR modifications included an interest rate concession and $49.8 million of TDR modifications resulted from modifications to the loan’s structure. During the nine months ended September 30, 2015 , $2.9 million of TDR modifications included an interest rate concession and $14.0 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 September 30, 2016 Three Months Ended September 30, 2015 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 4 $ 31,676 2 $ 69 Real estate – construction 1 112 — — Commercial real estate – mortgage — — 3 532 Residential real estate – mortgage 21 2,868 14 3,326 Equity lines of credit 30 1,468 27 1,488 Equity loans 6 635 8 340 Credit card — — — — Consumer direct 2 15 4 325 Consumer indirect 56 917 31 549 Covered loans — — 1 8 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 9 $ 32,026 5 $ 380 Real estate – construction 2 3,504 — — Commercial real estate – mortgage 5 1,431 4 758 Residential real estate – mortgage 59 10,654 36 7,571 Equity lines of credit 66 3,237 86 4,752 Equity loans 15 1,129 28 1,836 Credit card — — — — Consumer direct 3 24 21 627 Consumer indirect 119 1,999 53 928 Covered loans — — 3 29 For the three and nine months ended September 30, 2016 and 2015 , 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 September 30, 2016 Three Months Ended September 30, 2015 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction — — — — Commercial real estate – mortgage — — — — Residential real estate – mortgage — — 1 119 Equity lines of credit 8 204 1 — Equity loans 1 42 1 55 Credit card — — — — Consumer direct — — 1 100 Consumer indirect 1 13 — — Covered loans — — 1 18 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 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 Residential real estate – mortgage — — 6 862 Equity lines of credit 8 204 1 — Equity loans 1 42 3 216 Credit card — — — — Consumer direct — — 1 100 Consumer indirect 2 32 1 18 Covered loans — — 2 24 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 September 30, 2016 and December 31, 2015 , there were $21.9 million and $5.7 million , respectively, of commitments to lend additional funds to borrowers whose terms have been modified in a TDR. Foreclosure Proceedings OREO totaled $22 million and $21 million at September 30, 2016 and December 31, 2015 , respectively. OREO included $20 million and $17 million of foreclosed residential real estate properties at September 30, 2016 and December 31, 2015 , respectively. As of September 30, 2016 and December 31, 2015 , there were $29 million and $30 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	9 Months Ended
Loan Sales and Servicing	Sep. 30, 2016
Transfers and Servicing [Abstract]
Loan Sales and Servicing	Loan Sales and Servicing Loans held for sale were $102 million and $71 million at September 30, 2016 and December 31, 2015 , respectively. Loans held for sale at September 30, 2016 and December 31, 2015 were comprised entirely of residential real estate - mortgage loans. The following table summarizes the Company's activity in the loans held for sale portfolio and loan sales, excluding activity related to loans originated for sale in the secondary market. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Loans transferred from held for investment to held for sale $ — $ 907,414 $ 764,022 $ 907,414 Charge-offs on loans recognized at transfer from held for investment to held for sale — — — — Loans and loans held for sale sold 121,745 404,674 1,007,096 415,156 The following table summarizes the Company's sales of loans originated for sale in the secondary market. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Residential real estate loans originated for sale in the secondary market sold (1) $ 199,073 $ 724,493 $ 482,860 $ 1,309,035 Net gains recognized on sales of residential real estate loans originated for sale in the secondary market (2) 9,024 11,008 21,705 32,968 (1) Includes loans originated for sale where the Company retained servicing responsibilities. (2) Net 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 The following table summarizes the Company's activity related to residential real estate mortgage loans sold with retained servicing. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Residential real estate mortgage loans sold with retained servicing (3) $ 199,073 $ 724,493 $ 798,756 $ 1,308,853 Servicing fees recognized (4) 6,710 5,802 19,376 15,741 (3) There is no recourse to the Company for the failures of borrowers to pay loans when due. (4) Recorded as a component of other noninterest income in the Company's Unaudited Condensed Consolidated Statements of Income. The following table provides the recorded balance of loans sold with retained servicing and the related MSRs. September 30, 2016 December 31, 2015 (In Thousands) Recorded balance of residential real estate mortgage loans sold with retained servicing (5) $ 4,702,178 $ 4,444,602 MSRs (6) 39,027 44,541 (5) These loans are not included in loans on the Company's Unaudited Condensed Consolidated Balance Sheets. (6) Recorded under the fair value method and included 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 September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Carrying value, at beginning of period $ 36,496 $ 40,871 $ 44,541 $ 35,488 Additions 1,933 6,844 7,583 13,566 Increase (decrease) in fair value: Due to changes in valuation inputs or assumptions 3,250 (5,485 ) (5,391 ) (5,631 ) Due to other changes in fair value (7) (2,652 ) (992 ) (7,706 ) (2,185 ) Carrying value, at end of period $ 39,027 $ 41,238 $ 39,027 $ 41,238 (7) Represents the realization of expected net servicing cash flows, expected borrower repayments and the passage of time. See Note 9 , Fair Value of Financial Instruments , for additional disclosures related to the assumptions and estimates used in determining fair value of MSRs. At September 30, 2016 and December 31, 2015 , 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: September 30, 2016 December 31, 2015 (Dollars in Thousands) Fair value of MSRs $ 39,027 $ 44,541 Composition of residential loans serviced for others: Fixed rate mortgage loans 97.2 % 96.8 % Adjustable rate mortgage loans 2.8 3.2 Total 100.0 % 100.0 % Weighted average life (in years) 4.4 5.4 Prepayment speed: 20.6 % 12.4 % Effect on fair value of a 10% increase $ (1,834 ) $ (1,547 ) Effect on fair value of a 20% increase (3,512 ) (2,987 ) Weighted average option adjusted spread: 8.1 % 9.0 % Effect on fair value of a 10% increase $ (1,132 ) $ (1,504 ) Effect on fair value of a 20% increase (2,146 ) (2,911 ) 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 to another, which may magnify or counteract the effect of the change.

Derivatives and Hedging

Derivatives and Hedging	9 Months Ended
Derivatives and Hedging	Sep. 30, 2016
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 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, 2015 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. September 30, 2016 December 31, 2015 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 $ 95,671 $ — $ 2,123,950 $ 59,975 $ 9,405 Total fair value hedges 95,671 — 59,975 9,405 Cash flow hedges: Interest rate contracts: Swaps related to commercial loans 1,725,000 4,862 — 1,900,000 1,574 782 Swaps related to FHLB advances 120,000 — 11,846 320,000 — 10,858 Foreign currency contracts: Forwards related to currency fluctuations 5,593 — 389 8,318 — 40 Total cash flow hedges 4,862 12,235 1,574 11,680 Total derivatives designated as hedging instruments $ 100,533 $ 12,235 $ 61,549 $ 21,085 Free-standing derivatives not designated as hedging instruments: Interest rate contracts: Forward contracts related to held for sale mortgages $ 225,000 $ 107 $ 1,005 $ 216,500 $ 502 $ 217 Interest rate lock commitments 220,963 4,532 3 175,002 2,880 6 Equity contracts: Purchased equity option related to equity-linked CDs 839,895 61,157 — 876,649 59,375 — Written equity option related to equity-linked CDs 783,256 — 57,230 831,480 — 56,559 Foreign exchange contracts: Forwards and swaps related to commercial loans 393,264 849 1,601 479,072 3,821 752 Spots related to commercial loans 42,694 49 — 54,511 6 372 Swap associated with sale of Visa, Inc. Class B shares 72,405 — 1,810 67,896 — 1,697 Futures contracts (3) 210,000 — — 390,000 — — Trading account assets and liabilities: Interest rate contracts for customers 28,597,938 518,406 458,763 23,370,927 303,944 238,611 Commodity contracts for customers 21,692 2,093 2,093 114,336 14,127 14,110 Foreign exchange contracts for customers 900,644 13,027 10,997 425,946 9,899 8,578 Total trading account assets and liabilities 533,526 471,853 327,970 261,299 Total free-standing derivative instruments not designated as hedging instruments $ 600,220 $ 533,502 $ 394,554 $ 320,902 (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 change in fair value of 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 nine months ended September 30, 2016 and 2015 related to hedged firm commitments no longer qualifying as a fair value hedge. At September 30, 2016 , the fair value hedges had a weighted average expected remaining term of 4.4 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 September 30, Nine Months Ended September 30, Statements of Income Caption 2016 2015 2016 2015 (In Thousands) Change in fair value of interest rate contracts: Interest rate swaps hedging long term debt Interest on FHLB and other borrowings $ (20,209 ) $ 40,416 $ 45,101 $ 10,383 Hedged long term debt Interest on FHLB and other borrowings 19,246 (38,634 ) (39,978 ) (12,511 ) 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 10,489 12,413 31,834 34,157 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. The Company also uses foreign currency forward contracts to hedge its exposure to fluctuations in foreign currency exchange rates due to a portion of the money transfer expense being denominated in foreign currency. 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 nine months ended September 30, 2016 and 2015 . 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 nine months ended September 30, 2016 and 2015 . At September 30, 2016 , cash flow hedges not terminated had a net fair value of $(7.4) million and a weighted average life of 1.1 years . Net losses of $1.2 million are expected to be reclassified to 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 4.8 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 Nine Months Ended 2016 2015 2016 2015 (In Thousands) Interest rate and foreign currency exchange contracts: Net change in amount recognized in other comprehensive income $ (1,461 ) $ 2,042 $ 1,728 $ 5,322 Amount reclassified from accumulated other comprehensive income (loss) into net income 702 1,924 1,678 4,778 Amount of ineffectiveness recognized in net 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 interest rate contract portfolio classified as trading 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 September 30, Nine Months Ended September 30, Statements of Income Caption 2016 2015 2016 2015 (In Thousands) Futures contracts Mortgage banking income and corporate and correspondent investment sales $ 86 $ (248 ) $ (229 ) $ (199 ) Option contracts related to mortgage servicing rights Mortgage banking income — — (264 ) (195 ) Interest rate contracts: Forward contracts related to residential mortgage loans held for sale Mortgage banking income 1,094 (2,317 ) (2,027 ) 1,679 Interest rate lock commitments Mortgage banking income (162 ) 308 1,655 1,447 Interest rate contracts for customers Corporate and correspondent investment sales 5,371 4,961 14,780 21,490 Commodity contracts: Commodity contracts for customers Corporate and correspondent investment sales (1 ) (2 ) (6 ) 7 Equity contracts: Purchased equity option related to equity-linked CDs Other expense (3,716 ) (13,960 ) 1,782 (27,995 ) Written equity option related to equity-linked CDs Other expense 3,625 13,652 (672 ) 27,712 Foreign currency contracts: Forward and swap contracts related to commercial loans Other income (1,517 ) 17,181 (5,173 ) 40,265 Spot contracts related to commercial loans Other income 1,471 (4,143 ) 91 (7,663 ) Foreign currency exchange contracts for customers Corporate and correspondent investment sales 1,305 590 2,954 1,451 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 September 30, 2016 , interest rate swap agreements and options classified as trading were substantially matched. The Company had credit risk of $534 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 $2.6 million and $2.5 million of net credit losses associated with derivative instruments classified as trading for the three and nine months ended September 30, 2016 , respectively. There were $15 thousand and $9 thousand of net credit losses associated with derivative instruments classified as trading for the three and nine months ended September 30, 2015 . At September 30, 2016 and December 31, 2015 , 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 September 30, 2016 have credit risk of $101 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 nine months ended September 30, 2016 and 2015 . At September 30, 2016 and December 31, 2015 , there were no nonperforming derivative positions classified as nontrading. As of September 30, 2016 and December 31, 2015 , the Company had recorded the right to reclaim cash collateral of $295 million and $162 million , respectively, within other assets on the Company’s Unaudited Condensed Consolidated Balance Sheets and had recorded the obligation to return cash collateral of $39 million and $40 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 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 September 30, 2016 was $61 million for which the Company has collateral requirements of $60 million in the normal course of business. If the credit risk-related contingent features underlying these agreements had been triggered on September 30, 2016 , 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, 2015 was $46 million for which the Company had collateral requirements of $45 million in the normal course of business. If the credit risk-related contingent features underlying these agreements had been triggered on December 31, 2015 , the Company’s collateral requirements to its counterparties would have increased by $1 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 Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) September 30, 2016 Derivative financial assets: Subject to a master netting arrangement $ 285,731 $ — $ 285,731 $ 109 $ 35,882 $ 249,740 Not subject to a master netting arrangement 415,022 — 415,022 — — 415,022 Total derivative financial assets $ 700,753 $ — $ 700,753 $ 109 $ 35,882 $ 664,762 Derivative financial liabilities: Subject to a master netting arrangement $ 476,133 $ — $ 476,133 $ 24,862 $ 295,448 $ 155,823 Not subject to a master netting arrangement 69,604 — 69,604 — — 69,604 Total derivative financial liabilities $ 545,737 $ — $ 545,737 $ 24,862 $ 295,448 $ 225,427 December 31, 2015 Derivative financial assets: Subject to a master netting arrangement $ 191,061 $ — $ 191,061 $ — $ 33,517 $ 157,544 Not subject to a master netting arrangement 265,042 — 265,042 — — 265,042 Total derivative financial assets $ 456,103 $ — $ 456,103 $ — $ 33,517 $ 422,586 Derivative financial liabilities: Subject to a master netting arrangement $ 269,295 $ — $ 269,295 $ 23,856 $ 159,594 $ 85,845 Not subject to a master netting arrangement 72,692 — 72,692 — — 72,692 Total derivative financial liabilities $ 341,987 $ — $ 341,987 $ 23,856 $ 159,594 $ 158,537 (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	9 Months Ended
Securities Financing Activities	Sep. 30, 2016
Transfers and Servicing [Abstract]
Securities Financing Activities	Securities Financing Activities 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 6 , 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. Treasury and other U.S. government agencies, mortgage-backed securities and collateralized mortgage obligations. 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. Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) September 30, 2016 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 4,113,664 $ 3,795,800 $ 317,864 $ 317,864 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 3,881,978 $ 3,795,800 $ 86,178 $ 86,178 $ — $ — December 31, 2015 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 5,282,661 $ 5,003,555 $ 279,106 $ 279,106 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 5,080,164 $ 5,003,555 $ 76,609 $ 76,609 $ — $ — (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. Collateral Associated with Securities Financing Activities 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. Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater Than 90 days Total (In Thousands) September 30, 2016 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 1,557,005 $ 602,850 $ 1,632,513 $ — $ 3,792,368 Mortgage-backed securities — — 89,610 — 89,610 Total $ 1,557,005 $ 602,850 $ 1,722,123 $ — $ 3,881,978 December 31, 2015 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 3,214,085 $ 232,924 $ 518,623 $ — $ 3,965,632 Mortgage-backed securities — — 976,449 — 976,449 Collateralized mortgage obligations — — 138,083 — 138,083 Total $ 3,214,085 $ 232,924 $ 1,633,155 $ — $ 5,080,164 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 September 30, 2016 , the fair value of collateral received related to securities purchased under agreements to resell was $4.0 billion and the fair value of collateral pledged for securities sold under agreements to repurchase was $3.4 billion . At December 31, 2015 , the fair value of collateral received related to securities purchased under agreements to resell was $5.2 billion and the fair value of collateral pledged for securities sold under agreements to repurchase was $4.9 billion .

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	9 Months Ended
Commitments, Contingencies and Guarantees	Sep. 30, 2016
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: September 30, 2016 December 31, 2015 (In Thousands) Commitments to extend credit $ 26,736,536 $ 27,853,409 Standby and commercial letters of credit 1,406,754 1,709,145 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 September 30, 2016 and December 31, 2015 , the recorded amount of these deferred fees was $6.9 million and $6.0 million , respectively. The Company holds various assets as collateral supporting those commitments for which collateral is deemed necessary. At September 30, 2016 , the maximum potential amount of future undiscounted payments the Company could be required to make under outstanding standby letters of credit was $1.4 billion . At September 30, 2016 and December 31, 2015 , 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 $101 million and $85 million , respectively. Loan Sale Recourse The Company has potential recourse related to FNMA securitizations. At both September 30, 2016 and December 31, 2015 , the amount of potential recourse was $19 million of which the Company had reserved $680 thousand and $869 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 September 30, 2016 and December 31, 2015 , the Company had $1 million and $2 million , respectively, 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 September 30, 2016 and December 31, 2015 , the Company estimated the potential amount of payment due to the FDIC in 2019 , at the end of the loss sharing agreements, to be $147 million and $145 million , respectively. 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. The Company has chosen to net the amounts due from the FDIC and due to the FDIC into the FDIC indemnification liability. At September 30, 2016 and December 31, 2015 , the FDIC indemnification liability was $136 million and $131 million , respectively, and was recorded in accrued expenses and other liabilities in the Company's Unaudited Condensed Consolidated Balance Sheets. 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 legal proceedings. Set forth below are descriptions of certain of the Company’s legal proceedings. In February 2011 , BBVA Securities, Inc. (“BSI”) was named as a defendant in a lawsuit filed in the United States District Court for the Northern District of California, The California Public Employees’ Retirement System v. BBVA Securities, Inc., et al. , wherein the claims arise out of securities offerings in which Lehman Brothers was the issuer. BSI was an underwriter. The plaintiff alleges that Lehman Brothers made material misstatements in the offering materials, and that the underwriter defendants failed to conduct appropriate due diligence to discover the alleged misstatements. The plaintiff seeks unspecified monetary relief. The District Court granted the underwriter defendants' motion to dismiss and the plaintiff has appealed. On July 8, 2016 , the appellate court affirmed the dismissal of the claims against the underwriter defendants, and on September 22, 2016 , the plaintiff filed a petition for writ of certiorari with the United States Supreme Court. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In May 2013 , BBVA Compass 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 defendant/counterclaim plaintiff alleges that BBVA Compass wrongfully failed to honor a standby letter of credit in the amount of $5.2 million . The defendant/counterclaim plaintiff seeks $5.2 million , plus other, unspecified monetary relief. BBVA Compass obtained a defense verdict following a bench trial and the defendant/counterclaim plaintiff has appealed. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. In June 2013 , BBVA Compass was named as a defendant in a lawsuit filed in the United States District Court of the Northern District of Alabama, Intellectual Ventures II, LLC v. BBVA Compass Bancshares, Inc. and BBVA Compass , wherein the plaintiff alleges that BBVA Compass is infringing five patents owned by the plaintiff and related to the security infrastructure for BBVA Compass’ 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 January 2016 , BSI was named as a defendant in a lawsuit filed in the United States District Court for the Southern District of Texas, In re Plains All American Pipeline, L.P. Securities Litigation , wherein the plaintiffs challenge statements made in registration materials and prospectuses filed with the Securities and Exchange Commission in connection with eight securities offerings of stock and notes issued by Plains GP Holdings and Plains All American Pipeline. BSI was an underwriter. The plaintiffs seek unspecified monetary relief. The Company believes there are substantial defenses to these claims and intends to defend them vigorously. The Company (including its subsidiaries) 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 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. The Company is cooperating with the Federal Reserve Board as it considers potential enforcement action against BSI and the Company including the imposition of civil money penalties or other actions. 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 September 30, 2016 , the Company had accrued legal reserves in the amount of $30 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 September 30, 2016 , 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 a number of states, and has received notices of proposed adjustments related to 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	9 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2016
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 September 30, 2016 and December 31, 2015 , 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 gains (losses) of $(478) thousand and $1.4 million resulting from changes in fair value of these loans were recorded in noninterest income during the three months ended September 30, 2016 and 2015 , respectively. Net gains (losses) of $2.1 million and $(651) thousand resulting from changes in fair value of these loans were recorded in noninterest income during the nine months ended September 30, 2016 and 2015 , respectively. The Company also had fair value changes on forward contracts related to residential mortgage loans held for sale of approximately $1.1 million and $(2.3) million for the three months ended September 30, 2016 and 2015 , respectively. The Company also had fair value changes on forward contracts related to residential mortgage loans held for sale of approximately $(2.0) million and $1.7 million for the nine months ended September 30, 2016 and 2015 , respectively. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. The following table summarizes 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) September 30, 2016 Residential mortgage loans held for sale $ 101,843 $ 97,712 $ 4,131 December 31, 2015 Residential mortgage loans held for sale $ 70,582 $ 68,553 $ 2,029 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, option-adjusted spreads, 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 consideration, 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 September 30, 2016 (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 $ 3,512,398 $ 3,512,398 $ — $ — Collateralized mortgage obligations 518 — 518 — State and political subdivisions 1,183 — 1,183 — Other debt securities 2,852 — 2,852 — Interest rate contracts 518,406 — 518,406 — Commodity contracts 2,093 — 2,093 — Foreign exchange contracts 13,027 — 13,027 — Other trading assets 984 — — 984 Total trading account assets 4,051,461 3,512,398 538,079 984 Investment securities available for sale: U.S. Treasury and other U.S. government agencies 1,850,230 717,327 1,132,903 — Mortgage-backed securities 4,005,637 — 4,005,637 — Collateralized mortgage obligations 5,207,217 — 5,207,217 — States and political subdivisions 10,075 — 10,075 — Other debt securities 16,852 16,852 — — Equity securities (1) 344 51 — 293 Total investment securities available for sale 11,090,355 734,230 10,355,832 293 Loans held for sale 101,843 — 101,843 — Derivative assets: Interest rate contracts 105,172 — 100,640 4,532 Equity contracts 61,157 — 61,157 — Foreign exchange contracts 898 — 898 — Total derivative assets 167,227 — 162,695 4,532 Other assets 39,027 — — 39,027 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 3,540,472 $ 3,540,472 $ — $ — Other debt securities 751 — 751 — Interest rate contracts 458,763 — 458,763 — Commodity contracts 2,093 — 2,093 — Foreign exchange contracts 10,997 — 10,997 — Total trading account liabilities 4,013,076 3,540,472 472,604 — Derivative liabilities: Interest rate contracts 12,854 — 12,851 3 Equity contracts 57,230 — 57,230 — Foreign exchange contracts 1,990 — 1,990 — Total derivative liabilities 72,074 — 72,071 3 (1) Excludes $427 million of FHLB and Federal Reserve stock required to be owned by the Company at September 30, 2016 . 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, 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 $ 3,805,269 $ 3,805,269 $ — $ — State and political subdivisions 1,275 — 1,275 — Other debt securities 2,501 — 2,501 — Interest rate contracts 303,944 — 303,944 — Commodity contracts 14,127 — 14,127 — Foreign exchange contracts 9,899 — 9,899 — Other trading assets 1,117 — — 1,117 Total trading account assets 4,138,132 3,805,269 331,746 1,117 Investment securities available for sale: U.S. Treasury and other U.S. government agencies 3,211,492 1,982,408 1,229,084 — Mortgage-backed securities 4,590,262 — 4,590,262 — Collateralized mortgage obligations 2,705,256 — 2,705,256 — States and political subdivisions 15,887 — 15,887 — Other debt securities 24,045 24,045 — — Equity securities (1) 294 41 — 253 Total investment securities available for sale 10,547,236 2,006,494 8,540,489 253 Loans held for sale 70,582 — 70,582 — Derivative assets: Interest rate contracts 64,931 — 62,051 2,880 Equity contracts 59,375 — 59,375 — Foreign exchange contracts 3,827 — 3,827 — Total derivative assets 128,133 — 125,253 2,880 Other assets 44,541 — — 44,541 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 3,881,925 $ 3,881,925 $ — $ — Other debt securities 719 — 719 — Interest rate contracts 238,611 — 238,611 — Commodity contracts 14,110 — 14,110 — Foreign exchange contracts 8,578 — 8,578 — Total trading account liabilities 4,143,943 3,881,925 262,018 — Derivative liabilities: Interest rate contracts 21,268 — 21,262 6 Equity contracts 56,559 — 56,559 — Foreign exchange contracts 1,164 — 1,164 — Total derivative liabilities 78,991 — 78,985 6 (1) Excludes $503 million of FHLB and Federal Reserve stock required to be owned by the Company at December 31, 2015 . These securities are carried at par. There were no transfers between Levels 1 or 2 of the fair value hierarchy for the three and nine months ended September 30, 2016 and 2015 . 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 September 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) Balance, July 1, 2015 $ 1,400 $ 251 $ 3,457 $ 40,871 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (147 ) — 308 (6,477 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 6,844 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2015 $ 1,253 $ 250 $ 3,765 $ 41,238 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2015 $ (147 ) $ — $ 308 $ (6,477 ) Balance, July 1, 2016 $ 1,031 $ 294 $ 4,691 $ 36,496 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (47 ) — (162 ) 598 Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 1,933 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2016 $ 984 $ 293 $ 4,529 $ 39,027 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2016 $ (47 ) $ — $ (162 ) $ 598 (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income. Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Nine Months Ended September 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) 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) (337 ) — 1,447 (7,816 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 247 — — Issuances — — — 13,566 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2015 $ 1,253 $ 250 $ 3,765 $ 41,238 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2015 $ (337 ) $ — $ 1,447 $ (7,816 ) Balance, January 1, 2016 $ 1,117 $ 253 $ 2,874 $ 44,541 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (133 ) — 1,655 (13,097 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 41 — — Issuances — — — 7,583 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2016 $ 984 $ 293 $ 4,529 $ 39,027 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2016 $ (133 ) $ — $ 1,655 $ (13,097 ) (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 nine months ended September 30, 2016 and 2015 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) September 30, 2016 (Level 1) (Level 2) (Level 3) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 2,595 $ — $ — $ 2,595 $ — $ (130 ) Impaired loans (1) 71,806 — — 71,806 (9,202 ) (55,922 ) OREO 21,670 — — 21,670 (458 ) (2,777 ) 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) September 30, 2015 (Level 1) (Level 2) (Level 3) Three Months Ended September 30, 2015 Nine Months Ended September 30, 2015 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 15,423 $ — $ — $ 15,423 $ — $ (1,298 ) Impaired loans (1) 169,458 — — 169,458 (6,836 ) (11,689 ) OREO 23,762 — — 23,762 (1,135 ) (3,317 ) (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 September 30, 2016 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Other trading assets $ 984 Discounted cash flow Default rate 9.3% Prepayment rate 6.3% - 11.9% (8.5%) Interest rate contracts 4,529 Discounted cash flow Closing ratios (pull-through) 3.7% - 99.4% (62.0%) Cap grids 0.2% - 2.0% (0.9%) Other assets - MSRs 39,027 Discounted cash flow Option adjusted spread 6.1% - 18.6% (8.1%) Constant prepayment rate or life speed 1.8% - 71.6% (20.6%) Cost to service $65 - $4,000 ($88) Nonrecurring fair value measurements: Investment securities held to maturity $ 2,595 Discounted cash flow Prepayment rate 10.9% Default rate 9.2% Loss severity 63.7% Impaired loans 71,806 Appraised value Appraised value 0.0% - 80.0% (27.9%) OREO 21,670 Appraised value Appraised value 8.0% (1) (1) Represents discount to appraised value for estimated costs to sell. 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 option-adjusted spreads, constant prepayment rate or life speed, and cost to service assumptions. The impact of prepayments and changes in the option-adjusted spread 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: September 30, 2016 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 4,426,691 $ 4,426,691 $ 4,426,691 $ — $ — Investment securities held to maturity 1,240,850 1,241,234 — — 1,241,234 Loans, net 59,349,203 55,897,095 — — 55,897,095 Liabilities: Deposits $ 67,587,337 $ 67,754,047 $ — $ 67,754,047 $ — FHLB and other borrowings 3,671,861 3,637,982 — 3,637,982 — Federal funds purchased and securities sold under agreements to repurchase 165,573 165,573 — 165,573 — Other short-term borrowings 50,000 50,000 — 50,000 — December 31, 2015 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 4,496,828 $ 4,496,828 $ 4,496,828 $ — $ — Investment securities held to maturity 1,322,676 1,244,121 — — 1,244,121 Loans, net 60,561,411 57,916,215 — — 57,916,215 Liabilities: Deposits $ 65,981,766 $ 66,090,901 $ — $ 66,090,901 $ — FHLB and other borrowings 5,438,620 5,405,386 — 5,405,386 — Federal funds purchased and securities sold under agreements to repurchase 750,154 750,154 — 750,154 — Other short-term borrowings 150,000 150,000 — 150,000 — 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 fund purchased, securities sold under agreements to repurchase and short-term borrowings : The carrying amounts of federal funds purchased, securities sold under agreements to repurchase and other short-term borrowings approximates fair value. They are therefore considered a Level 2 measurement.

Comprehensive Income

Comprehensive Income	9 Months Ended
Comprehensive Income	Sep. 30, 2016
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. Three Months Ended September 30, 2016 2015 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income: Unrealized holding gains (losses) arising during period from securities available for sale $ (41,149 ) $ (15,073 ) $ (26,076 ) $ 48,686 $ 21,193 $ 27,493 Less: reclassification adjustment for net gains on sale of securities in net income — — — 6,736 2,932 3,804 Net change in unrealized gains (losses) on securities available for sale (41,149 ) (15,073 ) (26,076 ) 41,950 18,261 23,689 Change in unamortized net holding losses on investment securities held to maturity 1,844 676 1,168 1,886 820 1,066 Less: non-credit related impairment on investment securities held to maturity — — — — — — Change in unamortized non-credit related impairment on investment securities held to maturity 354 129 225 515 225 290 Net change in unamortized holding losses on securities held to maturity 2,198 805 1,393 2,401 1,045 1,356 Unrealized holding gains (losses) arising during period from cash flow hedge instruments (2,303 ) (842 ) (1,461 ) 3,456 1,414 2,042 Change in defined benefit plans — — — — — — Other comprehensive income (loss) $ (41,254 ) $ (15,110 ) $ (26,144 ) $ 47,807 $ 20,720 $ 27,087 Nine Months Ended September 30, 2016 2015 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income: Unrealized holding gains arising during period from securities available for sale $ 103,507 $ 37,915 $ 65,592 $ 69,541 $ 30,271 $ 39,270 Less: reclassification adjustment for net gains on sale of securities in net income 30,037 11,002 19,035 66,967 29,151 37,816 Net change in unrealized gains on securities available for sale 73,470 26,913 46,557 2,574 1,120 1,454 Change in unamortized net holding losses on investment securities held to maturity 4,615 1,691 2,924 8,559 3,725 4,834 Less: non-credit related impairment on investment securities held to maturity 151 55 96 87 38 49 Change in unamortized non-credit related impairment on investment securities held to maturity 1,021 373 648 1,247 543 704 Net change in unamortized holding losses on securities held to maturity 5,485 2,009 3,476 9,719 4,230 5,489 Unrealized holding gains arising during period from cash flow hedge instruments 2,734 1,006 1,728 9,105 3,783 5,322 Change in defined benefit plans 1,300 369 931 2,716 1,001 1,715 Other comprehensive income $ 82,989 $ 30,297 $ 52,692 $ 24,114 $ 10,134 $ 13,980 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, 2015 $ 4,469 $ (7,694 ) $ (41,121 ) $ (7,516 ) $ (51,862 ) Other comprehensive income (loss) before reclassifications 39,270 8,019 — (49 ) 47,240 Amounts reclassified from accumulated other comprehensive income (loss) (32,982 ) (2,697 ) 1,715 704 (33,260 ) Net current period other comprehensive income 6,288 5,322 1,715 655 13,980 Balance, September 30, 2015 $ 10,757 $ (2,372 ) $ (39,406 ) $ (6,861 ) $ (37,882 ) Balance, January 1, 2016 $ (56,326 ) $ (6,407 ) $ (29,166 ) $ (7,437 ) $ (99,336 ) Other comprehensive income (loss) before reclassifications 65,592 2,787 — (96 ) 68,283 Amounts reclassified from accumulated other comprehensive income (loss) (16,111 ) (1,059 ) 931 648 (15,591 ) Net current period other comprehensive income 49,481 1,728 931 552 52,692 Balance, September 30, 2016 $ (6,845 ) $ (4,679 ) $ (28,235 ) $ (6,885 ) $ (46,644 ) The following table presents information on reclassifications out of accumulated other comprehensive income (loss). Details About Accumulated Other Comprehensive Income (Loss) Components Amounts Reclassified From Accumulated Other Comprehensive Income (Loss) (1) Condensed Consolidated Statement of Income Caption Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity $ — $ 6,736 $ 30,037 $ 66,967 Investment securities gains, net (1,844 ) (1,886 ) (4,615 ) (8,559 ) Interest on investment securities held to maturity (1,844 ) 4,850 25,422 58,408 676 (2,112 ) (9,311 ) (25,426 ) Income tax (expense) benefit $ (1,168 ) $ 2,738 $ 16,111 $ 32,982 Net of tax Accumulated Gains (Losses) on Cash Flow Hedging Instruments $ 1,654 $ 3,646 $ 5,587 $ 9,985 Interest and fees on loans (952 ) (1,722 ) (3,909 ) (5,207 ) Interest and fees on FHLB advances 702 1,924 1,678 4,778 (260 ) (839 ) (619 ) (2,081 ) Income tax expense $ 442 $ 1,085 $ 1,059 $ 2,697 Net of tax Defined Benefit Plan Adjustment $ — $ — $ (1,300 ) $ (2,716 ) (2) — — 369 1,001 Income tax benefit $ — $ — $ (931 ) $ (1,715 ) Net of tax Unamortized Impairment Losses on Investment Securities Held to Maturity $ (354 ) $ (515 ) $ (1,021 ) $ (1,247 ) Interest on investment securities held to maturity 129 225 373 543 Income tax benefit $ (225 ) $ (290 ) $ (648 ) $ (704 ) 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 19, Benefit Plans, in the Notes to the December 31, 2015, Consolidated Financial Statements for additional details).

Supplemental Disclosure for Sta

Supplemental Disclosure for Statement of Cash Flows	9 Months Ended
Supplemental Disclosure for Statement of Cash Flows	Sep. 30, 2016
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. Nine Months Ended September 30, 2016 2015 (In Thousands) Supplemental disclosures of cash flow information: Interest paid $ 339,345 $ 277,140 Net income taxes paid 94,808 145,056 Supplemental schedule of noncash investing and financing activities: Transfer of loans and loans held for sale to OREO $ 21,547 $ 16,552 Transfer of loans to loans held for sale 764,022 906,857 Change in unrealized gains (losses) on available for sale securities 73,470 2,574 Issuance of restricted stock, net of cancellations 1,083 458

Segment Information

Segment Information	9 Months Ended
Segment Information	Sep. 30, 2016
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. The following tables present the segment information for the Company’s segments. Three Months Ended September 30, 2016 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 562,339 $ 26,338 $ (1,512 ) $ (72,356 ) $ 514,809 Allocated provision for loan losses 52,358 18,208 — (5,459 ) 65,107 Noninterest income 209,131 50,804 7,960 (4,130 ) 263,765 Noninterest expense 476,830 34,679 5,101 39,661 556,271 Net income (loss) before income tax expense (benefit) 242,282 24,255 1,347 (110,688 ) 157,196 Income tax expense (benefit) 84,799 8,489 471 (56,914 ) 36,845 Net income (loss) 157,483 15,766 876 (53,774 ) 120,351 Less: net income attributable to noncontrolling interests 107 — 420 (4 ) 523 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 157,376 $ 15,766 $ 456 $ (53,770 ) $ 119,828 Average assets $ 56,486,459 $ 10,980,519 $ 16,462,880 $ 6,970,481 $ 90,900,339 Three Months Ended September 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 508,900 $ 40,505 $ 6,228 $ (47,759 ) $ 507,874 Allocated provision for loan losses 27,562 24,466 — (22,877 ) 29,151 Noninterest income 221,063 27,514 7,879 4,264 260,720 Noninterest expense 469,335 38,044 4,656 45,340 557,375 Net income (loss) before income tax expense (benefit) 233,066 5,509 9,451 (65,958 ) 182,068 Income tax expense (benefit) 81,573 1,928 3,308 (34,381 ) 52,428 Net income (loss) 151,493 3,581 6,143 (31,577 ) 129,640 Less: net income attributable to noncontrolling interests 65 — 426 — 491 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 151,428 $ 3,581 $ 5,717 $ (31,577 ) $ 129,149 Average assets $ 55,341,631 $ 12,578,897 $ 15,085,951 $ 6,879,618 $ 89,886,097 Nine Months Ended September 30, 2016 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 1,659,588 $ 102,050 $ (18,114 ) $ (207,595 ) $ 1,535,929 Allocated provision for loan losses 167,559 87,729 — 9,737 265,025 Noninterest income 622,523 138,982 47,407 (13,696 ) 795,216 Noninterest expense 1,424,343 144,047 15,289 105,773 1,689,452 Net income (loss) before income tax expense (benefit) 690,209 9,256 14,004 (336,801 ) 376,668 Income tax expense (benefit) 241,573 3,239 4,901 (155,165 ) 94,548 Net income (loss) 448,636 6,017 9,103 (181,636 ) 282,120 Less: net income attributable to noncontrolling interests 306 — 1,271 (8 ) 1,569 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 448,330 $ 6,017 $ 7,832 $ (181,628 ) $ 280,551 Average assets $ 56,541,683 $ 11,960,225 $ 16,395,875 $ 6,980,644 $ 91,878,427 Nine Months Ended September 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 1,485,992 $ 119,259 $ 25,026 $ (121,389 ) $ 1,508,888 Allocated provision for loan losses 79,477 41,714 — (3,860 ) 117,331 Noninterest income 627,255 117,131 71,072 1,718 817,176 Noninterest expense 1,361,989 115,572 14,683 143,914 1,636,158 Net income (loss) before income tax expense (benefit) 671,781 79,104 81,415 (259,725 ) 572,575 Income tax expense (benefit) 235,123 27,686 28,495 (134,439 ) 156,865 Net income (loss) 436,658 51,418 52,920 (125,286 ) 415,710 Less: net income attributable to noncontrolling interests 448 — 1,290 — 1,738 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 436,210 $ 51,418 $ 51,630 $ (125,286 ) $ 413,972 Average assets $ 54,040,909 $ 12,459,085 $ 14,288,092 $ 6,909,436 $ 87,697,522 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 operating segments 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 operating segment based on the utilization of services provided or other appropriate indicators. Capital is allocated to the operating segments 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 2015 segment information has been revised to conform to the 2016 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	9 Months Ended
Related Party Transactions	Sep. 30, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company enters into various transactions with BBVA that affect the Company’s business and operations. The following discloses the significant transactions between the Company and BBVA during 2016 and 2015 . 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 total notional amount of outstanding derivative contracts between the Company and BBVA are $5.4 billion and $5.3 billion as of September 30, 2016 and December 31, 2015 , respectively. The net fair value of outstanding derivative contracts between the Company and BBVA are detailed below. September 30, 2016 December 31, 2015 (In Thousands) Derivative contracts: Fair value hedges $ 34,082 $ (9,405 ) Cash flow hedges (389 ) (40 ) Free-standing derivatives not designated as hedging instruments (58,934 ) (20,082 ) 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. September 30, 2016 December 31, 2015 (In Thousands) Securities purchased under agreements to resell $ 16,406 $ 26,404 Securities sold under agreements to repurchase 82,942 74,049 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 September 30, 2016 there was $50 million outstanding on the line of credit agreement and no amount outstanding under the revolving note and cash subordination agreement. At December 31, 2015 , there was $150 million outstanding on the line of credit agreement and no amount outstanding under the revolving note and cash subordination agreement. Interest expense related to these agreements was $1.1 million and $587 thousand for the three months ended September 30, 2016 and 2015 , respectively, and are included in interest on other short-term borrowings within the Company's Unaudited Condensed Consolidated Statements of Income. Interest expense related to these agreements was $2.7 million and $1.7 million for the nine months ended September 30, 2016 and 2015 , respectively, and are included in interest on other short-term borrowings within the Company's Unaudited Condensed Consolidated Statements of Income. Service and Referral Agreements The Company and its affiliates entered into or were subject to various service and referral agreements with BBVA and its affiliates. Each of the agreements was done in the ordinary course of business and on market terms. Income associated with these agreements was $6.5 million and $2.7 million for the three months ended September 30, 2016 and 2015 , respectively, and is recorded as a component of noninterest income within the Company's Unaudited Condensed Consolidated Statements of Income. Expenses associated with these agreements was $6.6 million and $5.6 million for the three months ended September 30, 2016 and 2015 , respectively, and is recorded as a component of noninterest expense within the Company's Unaudited Condensed Consolidated Statements of Income. Income associated with these agreements was $9.3 million for both the nine months ended September 30, 2016 and 2015 and is recorded as a component of noninterest income within the Company's Unaudited Condensed Consolidated Statements of Income. Expenses associated with these agreements were $19.2 million and $17.5 million for the nine months ended September 30, 2016 and 2015 , respectively, and is recorded as a component of noninterest expense within the Company's Unaudited Condensed Consolidated Statements of Income. Series A Preferred Stock BBVA is the sole holder of the Series A Preferred Stock that the Company issued in December 2015. At September 30, 2016 , the carrying amount of the Series A Preferred Stock was approximately $229 million . During the three months ended September 30, 2016 , the Company paid $3.5 million of preferred stock dividends to BBVA. During the nine months ended September 30, 2016 , the Company paid $10.1 million of preferred stock dividends to BBVA. Loan Sales to Related Parties During the nine months ended September 30, 2016 , the Company sold approximately $444 million of commercial loans to BBVA and recognized a gain on sale of $1.5 million that was recorded as a component of other noninterest income within the Company's Unaudited Condensed Consolidated Statements of Income.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2016
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 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 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 and its selection of transition method. Because the guidance does not apply to revenue associated with financial instruments, including loans and securities accounted for under other U.S. GAAP, the Company does not expect the new revenue recognition guidance to have a material impact on the elements of its statement of income most closely associated with financial instruments, including securities gains, interest income and interest expense. The Company plans to adopt this standard in the first quarter of 2018. 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 were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard did not 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 were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard did not 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 were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The adoption of this standard did not have a material impact on the financial condition or results of operations of the Company. Recognition and Measurement of Financial Assets and Liabilities In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Liabilities . The amendments in this ASU revise an entity's accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. The ASU also amends certain disclosure requirements associated with the fair value of financial instruments. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted for the presentation of certain fair value changes for financial liabilities measured at fair value. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Leases In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The FASB issued this ASU to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet by lessees for those leases classified as operating leases under current U.S. GAAP and disclosing key information about leasing arrangements. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of this ASU is permitted for all entities. 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. Stock Compensation In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting . The FASB issued this ASU to improve the accounting for share-based payment transactions as part of its simplification initiative. The areas for simplification in this ASU involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the financial condition or results of operations of the Company. Credit Losses In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses , which introduces new guidance for the accounting for credit losses on instruments within its scope. The new guidance introduces an approach based on expected losses to estimate credit losses on certain types of financial instruments. It also modifies the impairment model for AFS debt securities and provides for a simplified accounting model for purchased financial assets with credit deterioration since their origination. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2019. Early application of this ASU is permitted. 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. Statement of Cash Flows In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments , which provides guidance on eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early application of this ASU is permitted. The Company is currently assessing the impact that the adoption of this standard will have on the Statements of Cash Flows of the Company.
Derivatives and Hedging, policy	The Company has made an accounting policy decision to not offset derivative fair value amounts under master netting agreements.
Repurchase and resale agreements, policy	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.

Acquisition Activity (Tables)

Acquisition Activity (Tables)	9 Months Ended
Acquisition Activity (Tables)	Sep. 30, 2016
Business Combinations [Abstract]
Schedule of acquisitions of entities under common control	The following table summarizes the impact of the acquisition to certain captions within the Company's Unaudited Condensed Consolidated Balance Sheet as of December 31, 2015 and the Company's Unaudited Condensed Consolidated Income Statement for the three and nine months ended September 30, 2015 . Balance Sheet As Previously Reported Retrospective Adjustments As Retrospectively Adjusted (In Thousands) December 31, 2015 Assets: Cash and cash equivalents $ 4,452,892 $ 43,936 $ 4,496,828 Premises and equipment, net 1,320,163 2,215 1,322,378 Other assets 1,252,784 57,307 1,310,091 Total assets 89,965,080 103,458 90,068,538 Liabilities: Deposits $ 65,980,530 $ 1,236 $ 65,981,766 Accrued expenses and other liabilities 1,185,848 54,797 1,240,645 Total liabilities 77,387,796 56,033 77,443,829 Shareholder’s equity 12,577,284 47,425 12,624,709 Total liabilities and shareholder’s equity 89,965,080 103,458 90,068,538 Income Statement As Previously Reported Retrospective Adjustments As Retrospectively Adjusted (In Thousands) Three Months Ended September 30, 2015 Interest income $ 610,206 $ 7 $ 610,213 Noninterest income 233,376 27,344 260,720 Noninterest expense 536,250 21,125 557,375 Income tax expense 50,110 2,318 52,428 Net income 125,732 3,908 129,640 Nine Months Ended September 30, 2015 Interest income $ 1,821,284 $ 10 $ 1,821,294 Noninterest income 741,215 75,961 817,176 Noninterest expense 1,578,605 57,553 1,636,158 Income tax expense 150,008 6,857 156,865 Net income 404,149 11,561 415,710

Investment Securities Availab23

Investment Securities Available for Sale and Investment Securities Held to Maturity (Tables)	9 Months Ended
	Sep. 30, 2016
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. September 30, 2016 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 $ 1,856,178 $ 10,178 $ 16,126 $ 1,850,230 Mortgage-backed securities 3,988,469 36,732 19,564 4,005,637 Collateralized mortgage obligations 5,207,807 18,842 19,432 5,207,217 States and political subdivisions 9,787 288 — 10,075 Other 16,528 356 32 16,852 Equity securities 426,826 48 — 426,874 Total $ 11,505,595 $ 66,444 $ 55,154 $ 11,516,885 Investment securities held to maturity: Collateralized mortgage obligations $ 88,611 $ 4,733 $ 5,460 $ 87,884 Asset-backed securities 17,144 1,959 1,465 17,638 States and political subdivisions 1,070,917 17,667 16,516 1,072,068 Other 64,178 1,417 1,951 63,644 Total $ 1,240,850 $ 25,776 $ 25,392 $ 1,241,234 December 31, 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 $ 3,232,238 $ 4,076 $ 24,822 $ 3,211,492 Mortgage-backed securities 4,624,441 16,548 50,727 4,590,262 Collateralized mortgage obligations 2,713,075 8,200 16,019 2,705,256 States and political subdivisions 15,492 395 — 15,887 Other 23,914 175 44 24,045 Equity securities 503,540 38 — 503,578 Total $ 11,112,700 $ 29,432 $ 91,612 $ 11,050,520 Investment securities held to maturity: Collateralized mortgage obligations $ 103,947 $ 6,022 $ 4,634 $ 105,335 Asset-backed securities 24,011 3,002 1,574 25,439 States and political subdivisions 1,128,240 729 82,632 1,046,337 Other 66,478 2,644 2,112 67,010 Total $ 1,322,676 $ 12,397 $ 90,952 $ 1,244,121
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 September 30, 2016 and December 31, 2015 . This information is aggregated by investment category and the length of time the individual securities have been in an unrealized loss position. September 30, 2016 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 $ 386,626 $ 4,012 $ 604,317 $ 12,114 $ 990,943 $ 16,126 Mortgage-backed securities 301,922 2,182 1,502,080 17,382 1,804,002 19,564 Collateralized mortgage obligations 2,319,508 13,007 704,501 6,425 3,024,009 19,432 Other — — 1,090 32 1,090 32 Total $ 3,008,056 $ 19,201 $ 2,811,988 $ 35,953 $ 5,820,044 $ 55,154 Investment securities held to maturity: Collateralized mortgage obligations $ 4,099 $ 519 $ 50,858 $ 4,941 $ 54,957 $ 5,460 Asset-backed securities 425 14 9,964 1,451 10,389 1,465 States and political subdivisions 57,577 4,378 325,680 12,138 383,257 16,516 Other 16,504 94 3,538 1,857 20,042 1,951 Total $ 78,605 $ 5,005 $ 390,040 $ 20,387 $ 468,645 $ 25,392 December 31, 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 $ 2,081,528 $ 16,523 $ 460,160 $ 8,299 $ 2,541,688 $ 24,822 Mortgage-backed securities 2,623,761 20,380 1,408,069 30,347 4,031,830 50,727 Collateralized mortgage obligations 1,321,121 10,378 393,210 5,641 1,714,331 16,019 Other — — 1,078 44 1,078 44 Total $ 6,026,410 $ 47,281 $ 2,262,517 $ 44,331 $ 8,288,927 $ 91,612 Investment securities held to maturity: Collateralized mortgage obligations $ 11,066 $ 326 $ 52,601 $ 4,308 $ 63,667 $ 4,634 Asset-backed securities — — 15,790 1,574 15,790 1,574 States and political subdivisions 73,302 6,533 794,489 76,099 867,791 82,632 Other — — 4,015 2,112 4,015 2,112 Total $ 84,368 $ 6,859 $ 866,895 $ 84,093 $ 951,263 $ 90,952
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 Nine Months Ended 2016 2015 2016 2015 (In Thousands) Balance at beginning of period $ 22,582 $ 22,421 $ 22,452 $ 21,123 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 Additions for the credit component on debt securities in which OTTI was previously recognized — — 130 285 Balance at end of period $ 22,582 $ 22,421 $ 22,582 $ 22,421
Schedule of investments classified by contractual maturity date	The contractual maturities of the securities portfolios are presented in the following table. September 30, 2016 Amortized Cost Fair Value (In Thousands) Investment securities available for sale: Maturing within one year $ 91,838 $ 91,868 Maturing after one but within five years 365,562 369,917 Maturing after five but within ten years 367,002 370,969 Maturing after ten years 1,058,091 1,044,403 1,882,493 1,877,157 Mortgage-backed securities and collateralized mortgage obligations 9,196,276 9,212,854 Equity securities 426,826 426,874 Total $ 11,505,595 $ 11,516,885 Investment securities held to maturity: Maturing within one year $ 67,853 $ 68,283 Maturing after one but within five years 244,188 243,803 Maturing after five but within ten years 260,272 258,962 Maturing after ten years 579,926 582,302 1,152,239 1,153,350 Collateralized mortgage obligations 88,611 87,884 Total $ 1,240,850 $ 1,241,234
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 September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Gross gains $ — $ 8,568 $ 30,037 $ 68,799 Gross losses — 1,832 — 1,832 Net realized gains $ — $ 6,736 $ 30,037 $ 66,967

Loans and Allowance for Loan 24

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
Loans and Allowance for Loan Losses (Tables)	Sep. 30, 2016
Receivables [Abstract]
Schedule of composition of loan portfolio	The following table presents the composition of the loan portfolio. September 30, 2016 December 31, 2015 (In Thousands) Commercial loans: Commercial, financial and agricultural $ 24,839,068 $ 26,022,374 Real estate – construction 2,215,272 2,354,253 Commercial real estate – mortgage 11,361,630 10,453,280 Total commercial loans 38,415,970 38,829,907 Consumer loans: Residential real estate – mortgage 13,457,435 13,993,285 Equity lines of credit 2,494,468 2,419,815 Equity loans 479,375 580,804 Credit card 599,862 627,359 Consumer direct 1,186,827 936,871 Consumer indirect 3,196,235 3,495,082 Total consumer loans 21,414,202 22,053,216 Covered loans 381,111 440,961 Total loans $ 60,211,283 $ 61,324,084
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 (In Thousands) Three months ended September 30, 2016 Allowance for loan losses: Beginning balance $ 499,398 $ 114,311 $ 119,076 $ 110,266 $ — $ 843,051 Provision (credit) for loan losses 20,533 54 528 43,992 — 65,107 Loans charged off (13,702 ) (104 ) (4,608 ) (46,472 ) — (64,886 ) Loan recoveries 4,766 682 3,429 9,931 — 18,808 Net (charge-offs) recoveries (8,936 ) 578 (1,179 ) (36,541 ) — (46,078 ) Ending balance $ 510,995 $ 114,943 $ 118,425 $ 117,717 $ — $ 862,080 Three months ended September 30, 2015 Allowance for loan losses: Beginning balance $ 350,879 $ 135,152 $ 133,995 $ 99,559 $ 1,886 $ 721,471 Provision (credit) for loan losses 16,424 (7,256 ) (577 ) 20,091 469 29,151 Loans charged off (9,161 ) (910 ) (5,944 ) (27,567 ) (490 ) (44,072 ) Loan recoveries 5,171 899 3,772 5,728 2 15,572 Net (charge-offs) recoveries (3,990 ) (11 ) (2,172 ) (21,839 ) (488 ) (28,500 ) Ending balance $ 363,313 $ 127,885 $ 131,246 $ 97,811 $ 1,867 $ 722,122 Nine Months Ended September 30, 2016 Allowance for loan losses: Beginning balance $ 402,113 $ 122,068 $ 132,104 $ 104,948 $ 1,440 $ 762,673 Provision (credit) for loan losses 167,648 (7,393 ) (7,412 ) 112,058 124 265,025 Loans charged off (66,541 ) (3,555 ) (15,072 ) (125,607 ) (1,565 ) (212,340 ) Loan recoveries 7,775 3,823 8,805 26,318 1 46,722 Net (charge-offs) recoveries (58,766 ) 268 (6,267 ) (99,289 ) (1,564 ) (165,618 ) Ending balance $ 510,995 $ 114,943 $ 118,425 $ 117,717 $ — $ 862,080 Nine Months Ended September 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 74,127 (12,995 ) (13,458 ) 69,085 572 117,331 Loans charged off (20,706 ) (2,380 ) (20,889 ) (78,957 ) (1,516 ) (124,448 ) Loan recoveries 10,410 5,027 10,966 17,792 3 44,198 Net (charge-offs) recoveries (10,296 ) 2,647 (9,923 ) (61,165 ) (1,513 ) (80,250 ) Ending balance $ 363,313 $ 127,885 $ 131,246 $ 97,811 $ 1,867 $ 722,122 (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 (In Thousands) September 30, 2016 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 138,067 $ 3,253 $ 35,867 $ 2,507 $ — $ 179,694 Collectively evaluated for impairment 372,928 111,690 82,558 115,210 — 682,386 Purchased loans — — — — — — Total allowance for loan losses $ 510,995 $ 114,943 $ 118,425 $ 117,717 $ — $ 862,080 Ending balance of loans: Individually evaluated for impairment $ 839,679 $ 38,967 $ 180,308 $ 3,393 $ — $ 1,062,347 Collectively evaluated for impairment 23,972,927 13,503,337 16,250,039 4,975,230 — 58,701,533 Purchased loans 26,462 34,598 931 4,301 381,111 447,403 Total loans $ 24,839,068 $ 13,576,902 $ 16,431,278 $ 4,982,924 $ 381,111 $ 60,211,283 December 31, 2015 Ending balance of allowance attributable to loans: Individually evaluated for impairment $ 27,486 $ 3,725 $ 38,126 $ 1,880 $ — $ 71,217 Collectively evaluated for impairment 374,458 118,343 93,978 103,068 — 689,847 Purchased loans 169 — — — 1,440 1,609 Total allowance for loan losses $ 402,113 $ 122,068 $ 132,104 $ 104,948 $ 1,440 $ 762,673 Ending balance of loans: Individually evaluated for impairment $ 163,201 $ 80,123 $ 183,473 $ 2,789 $ — $ 429,586 Collectively evaluated for impairment 25,828,286 12,685,320 16,809,525 5,051,488 — 60,374,619 Purchased loans 30,887 42,090 906 5,035 440,961 519,879 Total loans $ 26,022,374 $ 12,807,533 $ 16,993,904 $ 5,059,312 $ 440,961 $ 61,324,084 (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 tables present information on individually evaluated impaired loans, by loan class. September 30, 2016 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 $ 420,005 $ 428,688 $ — $ 419,674 $ 445,592 $ 138,067 Real estate – construction — — — 707 819 377 Commercial real estate – mortgage 15,161 15,765 — 23,099 24,498 2,876 Residential real estate – mortgage — — — 111,773 111,773 9,226 Equity lines of credit — — — 25,679 26,069 20,572 Equity loans — — — 42,856 43,563 6,069 Credit card — — — — — — Consumer direct — — — 797 797 56 Consumer indirect — — — 2,596 2,596 2,451 Total loans $ 435,166 $ 444,453 $ — $ 627,181 $ 655,707 $ 179,694 December 31, 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 $ 45,583 $ 53,325 $ — $ 117,618 $ 122,148 $ 27,486 Real estate – construction 3,403 3,986 — 628 689 515 Commercial real estate – mortgage 24,851 27,486 — 51,241 54,863 3,210 Residential real estate – mortgage 6,521 6,521 — 102,375 102,375 7,370 Equity lines of credit — — — 28,164 30,302 23,183 Equity loans — — — 46,413 47,245 7,573 Credit card — — — — — — Consumer direct — — — 935 935 26 Consumer indirect — — — 1,854 1,854 1,854 Total loans $ 80,358 $ 91,318 $ — $ 349,228 $ 360,411 $ 71,217 The following tables present information on individually evaluated impaired loans, by loan class. Three Months Ended September 30, 2016 Three Months Ended September 30, 2015 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 769,719 $ 401 $ 133,652 $ 204 Real estate – construction 634 2 5,360 21 Commercial real estate – mortgage 36,874 255 87,352 517 Residential real estate – mortgage 110,262 666 107,927 707 Equity lines of credit 26,231 246 27,185 279 Equity loans 43,292 375 48,046 392 Credit card — — — — Consumer direct 803 7 397 4 Consumer indirect 2,505 3 1,749 — Total loans $ 990,320 $ 1,955 $ 411,668 $ 2,124 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In Thousands) Commercial, financial and agricultural $ 575,038 $ 1,033 $ 98,110 $ 909 Real estate – construction 2,118 6 5,837 97 Commercial real estate – mortgage 46,073 932 85,862 1,634 Residential real estate – mortgage 109,020 1,953 110,790 2,096 Equity lines of credit 27,170 790 26,891 838 Equity loans 44,629 1,123 50,168 1,197 Credit card — — — — Consumer direct 854 22 686 12 Consumer indirect 2,152 9 1,645 — Total loans $ 807,054 $ 5,868 $ 379,989 $ 6,783
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 September 30, 2016 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Pass $ 22,686,955 $ 2,154,286 $ 11,031,439 Special Mention 665,237 56,486 209,917 Substandard 1,164,997 4,485 102,879 Doubtful 321,879 15 17,395 $ 24,839,068 $ 2,215,272 $ 11,361,630 December 31, 2015 Commercial, Financial and Agricultural Real Estate - Construction Commercial Real Estate - Mortgage (In Thousands) Pass $ 24,823,312 $ 2,340,145 $ 10,165,630 Special Mention 469,400 5,148 142,124 Substandard 688,427 8,941 133,091 Doubtful 41,235 19 12,435 $ 26,022,374 $ 2,354,253 $ 10,453,280 Consumer September 30, 2016 Residential Real Estate – Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 13,335,843 $ 2,459,409 $ 465,626 $ 589,687 $ 1,181,871 $ 3,182,146 Nonperforming 121,592 35,059 13,749 10,175 4,956 14,089 $ 13,457,435 $ 2,494,468 $ 479,375 $ 599,862 $ 1,186,827 $ 3,196,235 December 31, 2015 Residential Real Estate -Mortgage Equity Lines of Credit Equity Loans Credit Card Consumer Direct Consumer Indirect (In Thousands) Noncovered loans: Performing $ 13,877,592 $ 2,381,909 $ 564,110 $ 617,641 $ 932,773 $ 3,484,426 Nonperforming 115,693 37,906 16,694 9,718 4,098 10,656 $ 13,993,285 $ 2,419,815 $ 580,804 $ 627,359 $ 936,871 $ 3,495,082
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. September 30, 2016 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 $ 72,328 $ 4,400 $ 5,320 $ 850,075 $ 9,283 $ 941,406 $ 23,897,662 $ 24,839,068 Real estate – construction 522 1,062 2,782 1,214 3,315 8,895 2,206,377 2,215,272 Commercial real estate – mortgage 7,614 369 783 63,593 5,141 77,500 11,284,130 11,361,630 Residential real estate – mortgage 56,204 21,200 3,929 117,243 63,008 261,584 13,195,851 13,457,435 Equity lines of credit 8,173 4,477 2,417 32,642 — 47,709 2,446,759 2,494,468 Equity loans 5,567 1,694 353 13,198 36,053 56,865 422,510 479,375 Credit card 5,696 4,264 10,175 — — 20,135 579,727 599,862 Consumer direct 12,099 4,725 4,191 765 759 22,539 1,164,288 1,186,827 Consumer indirect 73,045 20,165 7,070 7,019 — 107,299 3,088,936 3,196,235 Covered loans 4,075 3,844 28,505 269 — 36,693 344,418 381,111 Total loans $ 245,323 $ 66,200 $ 65,525 $ 1,086,018 $ 117,559 $ 1,580,625 $ 58,630,658 $ 60,211,283 December 31, 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 $ 8,197 $ 4,215 $ 3,567 $ 161,591 $ 9,402 $ 186,972 $ 25,835,402 $ 26,022,374 Real estate – construction 2,864 91 421 5,908 2,247 11,531 2,342,722 2,354,253 Commercial real estate – mortgage 3,843 1,461 2,237 69,953 33,904 111,398 10,341,882 10,453,280 Residential real estate – mortgage 47,323 19,540 1,961 113,234 67,343 249,401 13,743,884 13,993,285 Equity lines of credit 8,263 4,371 2,883 35,023 — 50,540 2,369,275 2,419,815 Equity loans 6,356 2,194 704 15,614 37,108 61,976 518,828 580,804 Credit card 5,563 4,622 9,718 — — 19,903 607,456 627,359 Consumer direct 7,648 3,801 3,537 561 908 16,455 920,416 936,871 Consumer indirect 73,438 17,167 5,629 5,027 — 101,261 3,393,821 3,495,082 Covered loans 4,862 3,454 37,972 134 — 46,422 394,539 440,961 Total loans $ 168,357 $ 60,916 $ 68,629 $ 407,045 $ 150,912 $ 855,859 $ 60,468,225 $ 61,324,084
Schedule of troubled debt restructuring loans and subsequent defaults 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 September 30, 2016 Three Months Ended September 30, 2015 Number of Contracts Recorded Investment at Default Number of Contracts Recorded Investment at Default (Dollars in Thousands) Commercial, financial and agricultural — $ — — $ — Real estate – construction — — — — Commercial real estate – mortgage — — — — Residential real estate – mortgage — — 1 119 Equity lines of credit 8 204 1 — Equity loans 1 42 1 55 Credit card — — — — Consumer direct — — 1 100 Consumer indirect 1 13 — — Covered loans — — 1 18 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 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 Residential real estate – mortgage — — 6 862 Equity lines of credit 8 204 1 — Equity loans 1 42 3 216 Credit card — — — — Consumer direct — — 1 100 Consumer indirect 2 32 1 18 Covered loans — — 2 24 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 September 30, 2016 Three Months Ended September 30, 2015 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 4 $ 31,676 2 $ 69 Real estate – construction 1 112 — — Commercial real estate – mortgage — — 3 532 Residential real estate – mortgage 21 2,868 14 3,326 Equity lines of credit 30 1,468 27 1,488 Equity loans 6 635 8 340 Credit card — — — — Consumer direct 2 15 4 325 Consumer indirect 56 917 31 549 Covered loans — — 1 8 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 Number of Contracts Post-Modification Outstanding Recorded Investment Number of Contracts Post-Modification Outstanding Recorded Investment (Dollars in Thousands) Commercial, financial and agricultural 9 $ 32,026 5 $ 380 Real estate – construction 2 3,504 — — Commercial real estate – mortgage 5 1,431 4 758 Residential real estate – mortgage 59 10,654 36 7,571 Equity lines of credit 66 3,237 86 4,752 Equity loans 15 1,129 28 1,836 Credit card — — — — Consumer direct 3 24 21 627 Consumer indirect 119 1,999 53 928 Covered loans — — 3 29 The following table provides a breakout of TDRs, including nonaccrual loans and covered loans and excluding loans classified as held for sale. September 30, 2016 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 $ — $ — $ 28,739 $ 28,772 $ 9,250 $ 38,022 Real estate – construction — — — 585 585 3,315 3,900 Commercial real estate – mortgage — — — 4,136 4,136 5,141 9,277 Residential real estate – mortgage 3,392 389 420 35,562 39,763 58,807 98,570 Equity lines of credit — — — 24,507 24,507 — 24,507 Equity loans 1,837 766 198 7,066 9,867 33,252 43,119 Credit card — — — — — — — Consumer direct — — — 37 37 759 796 Consumer indirect — — — 2,597 2,597 — 2,597 Covered loans — — — 27 27 — 27 Total loans $ 5,262 $ 1,155 $ 618 $ 103,256 $ 110,291 $ 110,524 $ 220,815 December 31, 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 $ — $ — $ — $ 131 $ 131 $ 9,402 $ 9,533 Real estate – construction — — — 495 495 2,247 2,742 Commercial real estate – mortgage — — — 7,205 7,205 33,904 41,109 Residential real estate – mortgage 2,188 1,935 498 30,174 34,795 62,722 97,517 Equity lines of credit — — — 27,176 27,176 — 27,176 Equity loans 1,737 782 376 9,844 12,739 34,213 46,952 Credit card — — — — — — — Consumer direct — — — 27 27 908 935 Consumer indirect — — — 1,853 1,853 — 1,853 Covered loans — — — 8 8 — 8 Total loans $ 3,925 $ 2,717 $ 874 $ 76,913 $ 84,429 $ 143,396 $ 227,825

Loan Sales and Servicing (Table

Loan Sales and Servicing (Tables)	9 Months Ended
Loan Sales and Servicing (Tables)	Sep. 30, 2016
Transfers and Servicing [Abstract]
Schedule of loans transferred to held for sale and loans sold	The following table summarizes the Company's activity in the loans held for sale portfolio and loan sales, excluding activity related to loans originated for sale in the secondary market. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Loans transferred from held for investment to held for sale $ — $ 907,414 $ 764,022 $ 907,414 Charge-offs on loans recognized at transfer from held for investment to held for sale — — — — Loans and loans held for sale sold 121,745 404,674 1,007,096 415,156
Schedule of loan sales and residential mortgage servicing rights	The following table summarizes the Company's sales of loans originated for sale in the secondary market. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Residential real estate loans originated for sale in the secondary market sold (1) $ 199,073 $ 724,493 $ 482,860 $ 1,309,035 Net gains recognized on sales of residential real estate loans originated for sale in the secondary market (2) 9,024 11,008 21,705 32,968 (1) Includes loans originated for sale where the Company retained servicing responsibilities. (2) Net 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 The following table summarizes the Company's activity related to residential real estate mortgage loans sold with retained servicing. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Residential real estate mortgage loans sold with retained servicing (3) $ 199,073 $ 724,493 $ 798,756 $ 1,308,853 Servicing fees recognized (4) 6,710 5,802 19,376 15,741 (3) There is no recourse to the Company for the failures of borrowers to pay loans when due. (4) Recorded as a component of other noninterest income in the Company's Unaudited Condensed Consolidated Statements of Income. The following table provides the recorded balance of loans sold with retained servicing and the related MSRs. September 30, 2016 December 31, 2015 (In Thousands) Recorded balance of residential real estate mortgage loans sold with retained servicing (5) $ 4,702,178 $ 4,444,602 MSRs (6) 39,027 44,541 (5) These loans are not included in loans on the Company's Unaudited Condensed Consolidated Balance Sheets. (6) Recorded under the fair value method and included in other assets on the Company's Unaudited Condensed Consolidated Balance Sheets. The following table is an analysis of the activity in the Company’s MSRs. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Carrying value, at beginning of period $ 36,496 $ 40,871 $ 44,541 $ 35,488 Additions 1,933 6,844 7,583 13,566 Increase (decrease) in fair value: Due to changes in valuation inputs or assumptions 3,250 (5,485 ) (5,391 ) (5,631 ) Due to other changes in fair value (7) (2,652 ) (992 ) (7,706 ) (2,185 ) Carrying value, at end of period $ 39,027 $ 41,238 $ 39,027 $ 41,238 (7) 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 September 30, 2016 and December 31, 2015 , 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: September 30, 2016 December 31, 2015 (Dollars in Thousands) Fair value of MSRs $ 39,027 $ 44,541 Composition of residential loans serviced for others: Fixed rate mortgage loans 97.2 % 96.8 % Adjustable rate mortgage loans 2.8 3.2 Total 100.0 % 100.0 % Weighted average life (in years) 4.4 5.4 Prepayment speed: 20.6 % 12.4 % Effect on fair value of a 10% increase $ (1,834 ) $ (1,547 ) Effect on fair value of a 20% increase (3,512 ) (2,987 ) Weighted average option adjusted spread: 8.1 % 9.0 % Effect on fair value of a 10% increase $ (1,132 ) $ (1,504 ) Effect on fair value of a 20% increase (2,146 ) (2,911 )

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	9 Months Ended
Derivatives and Hedging (Tables)	Sep. 30, 2016
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. September 30, 2016 December 31, 2015 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 $ 95,671 $ — $ 2,123,950 $ 59,975 $ 9,405 Total fair value hedges 95,671 — 59,975 9,405 Cash flow hedges: Interest rate contracts: Swaps related to commercial loans 1,725,000 4,862 — 1,900,000 1,574 782 Swaps related to FHLB advances 120,000 — 11,846 320,000 — 10,858 Foreign currency contracts: Forwards related to currency fluctuations 5,593 — 389 8,318 — 40 Total cash flow hedges 4,862 12,235 1,574 11,680 Total derivatives designated as hedging instruments $ 100,533 $ 12,235 $ 61,549 $ 21,085 Free-standing derivatives not designated as hedging instruments: Interest rate contracts: Forward contracts related to held for sale mortgages $ 225,000 $ 107 $ 1,005 $ 216,500 $ 502 $ 217 Interest rate lock commitments 220,963 4,532 3 175,002 2,880 6 Equity contracts: Purchased equity option related to equity-linked CDs 839,895 61,157 — 876,649 59,375 — Written equity option related to equity-linked CDs 783,256 — 57,230 831,480 — 56,559 Foreign exchange contracts: Forwards and swaps related to commercial loans 393,264 849 1,601 479,072 3,821 752 Spots related to commercial loans 42,694 49 — 54,511 6 372 Swap associated with sale of Visa, Inc. Class B shares 72,405 — 1,810 67,896 — 1,697 Futures contracts (3) 210,000 — — 390,000 — — Trading account assets and liabilities: Interest rate contracts for customers 28,597,938 518,406 458,763 23,370,927 303,944 238,611 Commodity contracts for customers 21,692 2,093 2,093 114,336 14,127 14,110 Foreign exchange contracts for customers 900,644 13,027 10,997 425,946 9,899 8,578 Total trading account assets and liabilities 533,526 471,853 327,970 261,299 Total free-standing derivative instruments not designated as hedging instruments $ 600,220 $ 533,502 $ 394,554 $ 320,902 (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 September 30, Nine Months Ended September 30, Statements of Income Caption 2016 2015 2016 2015 (In Thousands) Change in fair value of interest rate contracts: Interest rate swaps hedging long term debt Interest on FHLB and other borrowings $ (20,209 ) $ 40,416 $ 45,101 $ 10,383 Hedged long term debt Interest on FHLB and other borrowings 19,246 (38,634 ) (39,978 ) (12,511 ) 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 10,489 12,413 31,834 34,157
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 Nine Months Ended 2016 2015 2016 2015 (In Thousands) Interest rate and foreign currency exchange contracts: Net change in amount recognized in other comprehensive income $ (1,461 ) $ 2,042 $ 1,728 $ 5,322 Amount reclassified from accumulated other comprehensive income (loss) into net income 702 1,924 1,678 4,778 Amount of ineffectiveness recognized in net 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 September 30, Nine Months Ended September 30, Statements of Income Caption 2016 2015 2016 2015 (In Thousands) Futures contracts Mortgage banking income and corporate and correspondent investment sales $ 86 $ (248 ) $ (229 ) $ (199 ) Option contracts related to mortgage servicing rights Mortgage banking income — — (264 ) (195 ) Interest rate contracts: Forward contracts related to residential mortgage loans held for sale Mortgage banking income 1,094 (2,317 ) (2,027 ) 1,679 Interest rate lock commitments Mortgage banking income (162 ) 308 1,655 1,447 Interest rate contracts for customers Corporate and correspondent investment sales 5,371 4,961 14,780 21,490 Commodity contracts: Commodity contracts for customers Corporate and correspondent investment sales (1 ) (2 ) (6 ) 7 Equity contracts: Purchased equity option related to equity-linked CDs Other expense (3,716 ) (13,960 ) 1,782 (27,995 ) Written equity option related to equity-linked CDs Other expense 3,625 13,652 (672 ) 27,712 Foreign currency contracts: Forward and swap contracts related to commercial loans Other income (1,517 ) 17,181 (5,173 ) 40,265 Spot contracts related to commercial loans Other income 1,471 (4,143 ) 91 (7,663 ) Foreign currency exchange contracts for customers Corporate and correspondent investment sales 1,305 590 2,954 1,451
Schedule Of Assets 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 Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) September 30, 2016 Derivative financial assets: Subject to a master netting arrangement $ 285,731 $ — $ 285,731 $ 109 $ 35,882 $ 249,740 Not subject to a master netting arrangement 415,022 — 415,022 — — 415,022 Total derivative financial assets $ 700,753 $ — $ 700,753 $ 109 $ 35,882 $ 664,762 Derivative financial liabilities: Subject to a master netting arrangement $ 476,133 $ — $ 476,133 $ 24,862 $ 295,448 $ 155,823 Not subject to a master netting arrangement 69,604 — 69,604 — — 69,604 Total derivative financial liabilities $ 545,737 $ — $ 545,737 $ 24,862 $ 295,448 $ 225,427 December 31, 2015 Derivative financial assets: Subject to a master netting arrangement $ 191,061 $ — $ 191,061 $ — $ 33,517 $ 157,544 Not subject to a master netting arrangement 265,042 — 265,042 — — 265,042 Total derivative financial assets $ 456,103 $ — $ 456,103 $ — $ 33,517 $ 422,586 Derivative financial liabilities: Subject to a master netting arrangement $ 269,295 $ — $ 269,295 $ 23,856 $ 159,594 $ 85,845 Not subject to a master netting arrangement 72,692 — 72,692 — — 72,692 Total derivative financial liabilities $ 341,987 $ — $ 341,987 $ 23,856 $ 159,594 $ 158,537 (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.
Schedule Of 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 Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) September 30, 2016 Derivative financial assets: Subject to a master netting arrangement $ 285,731 $ — $ 285,731 $ 109 $ 35,882 $ 249,740 Not subject to a master netting arrangement 415,022 — 415,022 — — 415,022 Total derivative financial assets $ 700,753 $ — $ 700,753 $ 109 $ 35,882 $ 664,762 Derivative financial liabilities: Subject to a master netting arrangement $ 476,133 $ — $ 476,133 $ 24,862 $ 295,448 $ 155,823 Not subject to a master netting arrangement 69,604 — 69,604 — — 69,604 Total derivative financial liabilities $ 545,737 $ — $ 545,737 $ 24,862 $ 295,448 $ 225,427 December 31, 2015 Derivative financial assets: Subject to a master netting arrangement $ 191,061 $ — $ 191,061 $ — $ 33,517 $ 157,544 Not subject to a master netting arrangement 265,042 — 265,042 — — 265,042 Total derivative financial assets $ 456,103 $ — $ 456,103 $ — $ 33,517 $ 422,586 Derivative financial liabilities: Subject to a master netting arrangement $ 269,295 $ — $ 269,295 $ 23,856 $ 159,594 $ 85,845 Not subject to a master netting arrangement 72,692 — 72,692 — — 72,692 Total derivative financial liabilities $ 341,987 $ — $ 341,987 $ 23,856 $ 159,594 $ 158,537 (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 Activiti27

Securities Financing Activities (Tables)	9 Months Ended
Securities Financing Activities (Tables)	Sep. 30, 2016
Transfers and Servicing [Abstract]
Schedule of assets and liabilities subject to enforceable master netting arrangements	Gross Amounts Recognized Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amount Presented in the Condensed Consolidated Balance Sheets Financial Instruments Collateral Received/Pledged (1) Cash Collateral Received/ Pledged (1) Net Amount (In Thousands) September 30, 2016 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 4,113,664 $ 3,795,800 $ 317,864 $ 317,864 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 3,881,978 $ 3,795,800 $ 86,178 $ 86,178 $ — $ — December 31, 2015 Securities purchased under agreements to resell: Subject to a master netting arrangement $ 5,282,661 $ 5,003,555 $ 279,106 $ 279,106 $ — $ — Securities sold under agreements to repurchase: Subject to a master netting arrangement $ 5,080,164 $ 5,003,555 $ 76,609 $ 76,609 $ — $ — (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.
Schedule of securities sold under agreements to repurchase	The following table presents the Company's related activity, by collateral type and remaining contractual maturity. Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater Than 90 days Total (In Thousands) September 30, 2016 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 1,557,005 $ 602,850 $ 1,632,513 $ — $ 3,792,368 Mortgage-backed securities — — 89,610 — 89,610 Total $ 1,557,005 $ 602,850 $ 1,722,123 $ — $ 3,881,978 December 31, 2015 Securities sold under agreements to repurchase: U.S. Treasury and other U.S. government agencies $ 3,214,085 $ 232,924 $ 518,623 $ — $ 3,965,632 Mortgage-backed securities — — 976,449 — 976,449 Collateralized mortgage obligations — — 138,083 — 138,083 Total $ 3,214,085 $ 232,924 $ 1,633,155 $ — $ 5,080,164

Commitments, Contingencies an28

Commitments, Contingencies and Guarantees (Tables)	9 Months Ended
Commitments, Contingencies and Guarantees (Tables)	Sep. 30, 2016
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: September 30, 2016 December 31, 2015 (In Thousands) Commitments to extend credit $ 26,736,536 $ 27,853,409 Standby and commercial letters of credit 1,406,754 1,709,145

Fair Value of Financial Instr29

Fair Value of Financial Instruments (Tables)	9 Months Ended
Fair Value of Financial Instruments (Tables)	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of differences between aggregate fair value and aggregate unpaid principle balance	The following table summarizes 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) September 30, 2016 Residential mortgage loans held for sale $ 101,843 $ 97,712 $ 4,131 December 31, 2015 Residential mortgage loans held for sale $ 70,582 $ 68,553 $ 2,029
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 September 30, 2016 (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 $ 3,512,398 $ 3,512,398 $ — $ — Collateralized mortgage obligations 518 — 518 — State and political subdivisions 1,183 — 1,183 — Other debt securities 2,852 — 2,852 — Interest rate contracts 518,406 — 518,406 — Commodity contracts 2,093 — 2,093 — Foreign exchange contracts 13,027 — 13,027 — Other trading assets 984 — — 984 Total trading account assets 4,051,461 3,512,398 538,079 984 Investment securities available for sale: U.S. Treasury and other U.S. government agencies 1,850,230 717,327 1,132,903 — Mortgage-backed securities 4,005,637 — 4,005,637 — Collateralized mortgage obligations 5,207,217 — 5,207,217 — States and political subdivisions 10,075 — 10,075 — Other debt securities 16,852 16,852 — — Equity securities (1) 344 51 — 293 Total investment securities available for sale 11,090,355 734,230 10,355,832 293 Loans held for sale 101,843 — 101,843 — Derivative assets: Interest rate contracts 105,172 — 100,640 4,532 Equity contracts 61,157 — 61,157 — Foreign exchange contracts 898 — 898 — Total derivative assets 167,227 — 162,695 4,532 Other assets 39,027 — — 39,027 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 3,540,472 $ 3,540,472 $ — $ — Other debt securities 751 — 751 — Interest rate contracts 458,763 — 458,763 — Commodity contracts 2,093 — 2,093 — Foreign exchange contracts 10,997 — 10,997 — Total trading account liabilities 4,013,076 3,540,472 472,604 — Derivative liabilities: Interest rate contracts 12,854 — 12,851 3 Equity contracts 57,230 — 57,230 — Foreign exchange contracts 1,990 — 1,990 — Total derivative liabilities 72,074 — 72,071 3 (1) Excludes $427 million of FHLB and Federal Reserve stock required to be owned by the Company at September 30, 2016 . 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, 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 $ 3,805,269 $ 3,805,269 $ — $ — State and political subdivisions 1,275 — 1,275 — Other debt securities 2,501 — 2,501 — Interest rate contracts 303,944 — 303,944 — Commodity contracts 14,127 — 14,127 — Foreign exchange contracts 9,899 — 9,899 — Other trading assets 1,117 — — 1,117 Total trading account assets 4,138,132 3,805,269 331,746 1,117 Investment securities available for sale: U.S. Treasury and other U.S. government agencies 3,211,492 1,982,408 1,229,084 — Mortgage-backed securities 4,590,262 — 4,590,262 — Collateralized mortgage obligations 2,705,256 — 2,705,256 — States and political subdivisions 15,887 — 15,887 — Other debt securities 24,045 24,045 — — Equity securities (1) 294 41 — 253 Total investment securities available for sale 10,547,236 2,006,494 8,540,489 253 Loans held for sale 70,582 — 70,582 — Derivative assets: Interest rate contracts 64,931 — 62,051 2,880 Equity contracts 59,375 — 59,375 — Foreign exchange contracts 3,827 — 3,827 — Total derivative assets 128,133 — 125,253 2,880 Other assets 44,541 — — 44,541 Liabilities: Trading account liabilities: U.S. Treasury and other U.S. government agencies $ 3,881,925 $ 3,881,925 $ — $ — Other debt securities 719 — 719 — Interest rate contracts 238,611 — 238,611 — Commodity contracts 14,110 — 14,110 — Foreign exchange contracts 8,578 — 8,578 — Total trading account liabilities 4,143,943 3,881,925 262,018 — Derivative liabilities: Interest rate contracts 21,268 — 21,262 6 Equity contracts 56,559 — 56,559 — Foreign exchange contracts 1,164 — 1,164 — Total derivative liabilities 78,991 — 78,985 6 (1) Excludes $503 million of FHLB and Federal Reserve stock required to be owned by the Company at December 31, 2015 . 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 September 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) Balance, July 1, 2015 $ 1,400 $ 251 $ 3,457 $ 40,871 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (147 ) — 308 (6,477 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 6,844 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2015 $ 1,253 $ 250 $ 3,765 $ 41,238 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2015 $ (147 ) $ — $ 308 $ (6,477 ) Balance, July 1, 2016 $ 1,031 $ 294 $ 4,691 $ 36,496 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (47 ) — (162 ) 598 Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — — — — Issuances — — — 1,933 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2016 $ 984 $ 293 $ 4,529 $ 39,027 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2016 $ (47 ) $ — $ (162 ) $ 598 (1) Included in noninterest income in the Unaudited Condensed Consolidated Statements of Income. Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Nine Months Ended September 30, Other Trading Assets Equity Securities Interest Rate Contracts, net Other Assets (In Thousands) 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) (337 ) — 1,447 (7,816 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 247 — — Issuances — — — 13,566 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2015 $ 1,253 $ 250 $ 3,765 $ 41,238 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2015 $ (337 ) $ — $ 1,447 $ (7,816 ) Balance, January 1, 2016 $ 1,117 $ 253 $ 2,874 $ 44,541 Transfers into Level 3 — — — — Transfers out of Level 3 — — — — Total gains or losses (realized/unrealized): Included in earnings (1) (133 ) — 1,655 (13,097 ) Included in other comprehensive income — — — — Purchases, issuances, sales and settlements: Purchases — 41 — — Issuances — — — 7,583 Sales — (1 ) — — Settlements — — — — Balance, September 30, 2016 $ 984 $ 293 $ 4,529 $ 39,027 Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held at September 30, 2016 $ (133 ) $ — $ 1,655 $ (13,097 ) (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 nine months ended September 30, 2016 and 2015 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) September 30, 2016 (Level 1) (Level 2) (Level 3) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 2,595 $ — $ — $ 2,595 $ — $ (130 ) Impaired loans (1) 71,806 — — 71,806 (9,202 ) (55,922 ) OREO 21,670 — — 21,670 (458 ) (2,777 ) 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) September 30, 2015 (Level 1) (Level 2) (Level 3) Three Months Ended September 30, 2015 Nine Months Ended September 30, 2015 (In Thousands) Nonrecurring fair value measurements Assets: Investment securities held to maturity $ 15,423 $ — $ — $ 15,423 $ — $ (1,298 ) Impaired loans (1) 169,458 — — 169,458 (6,836 ) (11,689 ) OREO 23,762 — — 23,762 (1,135 ) (3,317 ) (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 September 30, 2016 Valuation Technique Unobservable Input(s) (Weighted Average) (In Thousands) Recurring fair value measurements: Other trading assets $ 984 Discounted cash flow Default rate 9.3% Prepayment rate 6.3% - 11.9% (8.5%) Interest rate contracts 4,529 Discounted cash flow Closing ratios (pull-through) 3.7% - 99.4% (62.0%) Cap grids 0.2% - 2.0% (0.9%) Other assets - MSRs 39,027 Discounted cash flow Option adjusted spread 6.1% - 18.6% (8.1%) Constant prepayment rate or life speed 1.8% - 71.6% (20.6%) Cost to service $65 - $4,000 ($88) Nonrecurring fair value measurements: Investment securities held to maturity $ 2,595 Discounted cash flow Prepayment rate 10.9% Default rate 9.2% Loss severity 63.7% Impaired loans 71,806 Appraised value Appraised value 0.0% - 80.0% (27.9%) OREO 21,670 Appraised value Appraised value 8.0% (1) (1) Represents discount to appraised value for estimated costs to sell.
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: September 30, 2016 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 4,426,691 $ 4,426,691 $ 4,426,691 $ — $ — Investment securities held to maturity 1,240,850 1,241,234 — — 1,241,234 Loans, net 59,349,203 55,897,095 — — 55,897,095 Liabilities: Deposits $ 67,587,337 $ 67,754,047 $ — $ 67,754,047 $ — FHLB and other borrowings 3,671,861 3,637,982 — 3,637,982 — Federal funds purchased and securities sold under agreements to repurchase 165,573 165,573 — 165,573 — Other short-term borrowings 50,000 50,000 — 50,000 — December 31, 2015 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 (In Thousands) Financial Instruments: Assets: Cash and cash equivalents $ 4,496,828 $ 4,496,828 $ 4,496,828 $ — $ — Investment securities held to maturity 1,322,676 1,244,121 — — 1,244,121 Loans, net 60,561,411 57,916,215 — — 57,916,215 Liabilities: Deposits $ 65,981,766 $ 66,090,901 $ — $ 66,090,901 $ — FHLB and other borrowings 5,438,620 5,405,386 — 5,405,386 — Federal funds purchased and securities sold under agreements to repurchase 750,154 750,154 — 750,154 — Other short-term borrowings 150,000 150,000 — 150,000 —

Comprehensive Income (Tables)

Comprehensive Income (Tables)	9 Months Ended
Comprehensive Income (Tables)	Sep. 30, 2016
Equity [Abstract]
Change in components of other comprehensive income (loss)	The following summarizes the change in the components of other comprehensive income. Three Months Ended September 30, 2016 2015 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income: Unrealized holding gains (losses) arising during period from securities available for sale $ (41,149 ) $ (15,073 ) $ (26,076 ) $ 48,686 $ 21,193 $ 27,493 Less: reclassification adjustment for net gains on sale of securities in net income — — — 6,736 2,932 3,804 Net change in unrealized gains (losses) on securities available for sale (41,149 ) (15,073 ) (26,076 ) 41,950 18,261 23,689 Change in unamortized net holding losses on investment securities held to maturity 1,844 676 1,168 1,886 820 1,066 Less: non-credit related impairment on investment securities held to maturity — — — — — — Change in unamortized non-credit related impairment on investment securities held to maturity 354 129 225 515 225 290 Net change in unamortized holding losses on securities held to maturity 2,198 805 1,393 2,401 1,045 1,356 Unrealized holding gains (losses) arising during period from cash flow hedge instruments (2,303 ) (842 ) (1,461 ) 3,456 1,414 2,042 Change in defined benefit plans — — — — — — Other comprehensive income (loss) $ (41,254 ) $ (15,110 ) $ (26,144 ) $ 47,807 $ 20,720 $ 27,087 Nine Months Ended September 30, 2016 2015 Pretax Tax Expense/ (Benefit) After-tax Pretax Tax Expense/ (Benefit) After-tax (In Thousands) Other comprehensive income: Unrealized holding gains arising during period from securities available for sale $ 103,507 $ 37,915 $ 65,592 $ 69,541 $ 30,271 $ 39,270 Less: reclassification adjustment for net gains on sale of securities in net income 30,037 11,002 19,035 66,967 29,151 37,816 Net change in unrealized gains on securities available for sale 73,470 26,913 46,557 2,574 1,120 1,454 Change in unamortized net holding losses on investment securities held to maturity 4,615 1,691 2,924 8,559 3,725 4,834 Less: non-credit related impairment on investment securities held to maturity 151 55 96 87 38 49 Change in unamortized non-credit related impairment on investment securities held to maturity 1,021 373 648 1,247 543 704 Net change in unamortized holding losses on securities held to maturity 5,485 2,009 3,476 9,719 4,230 5,489 Unrealized holding gains arising during period from cash flow hedge instruments 2,734 1,006 1,728 9,105 3,783 5,322 Change in defined benefit plans 1,300 369 931 2,716 1,001 1,715 Other comprehensive income $ 82,989 $ 30,297 $ 52,692 $ 24,114 $ 10,134 $ 13,980
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, 2015 $ 4,469 $ (7,694 ) $ (41,121 ) $ (7,516 ) $ (51,862 ) Other comprehensive income (loss) before reclassifications 39,270 8,019 — (49 ) 47,240 Amounts reclassified from accumulated other comprehensive income (loss) (32,982 ) (2,697 ) 1,715 704 (33,260 ) Net current period other comprehensive income 6,288 5,322 1,715 655 13,980 Balance, September 30, 2015 $ 10,757 $ (2,372 ) $ (39,406 ) $ (6,861 ) $ (37,882 ) Balance, January 1, 2016 $ (56,326 ) $ (6,407 ) $ (29,166 ) $ (7,437 ) $ (99,336 ) Other comprehensive income (loss) before reclassifications 65,592 2,787 — (96 ) 68,283 Amounts reclassified from accumulated other comprehensive income (loss) (16,111 ) (1,059 ) 931 648 (15,591 ) Net current period other comprehensive income 49,481 1,728 931 552 52,692 Balance, September 30, 2016 $ (6,845 ) $ (4,679 ) $ (28,235 ) $ (6,885 ) $ (46,644 )
Schedule of reclassifications out of accumulated other comprehensive income	The following table presents information on reclassifications out of accumulated other comprehensive income (loss). Details About Accumulated Other Comprehensive Income (Loss) Components Amounts Reclassified From Accumulated Other Comprehensive Income (Loss) (1) Condensed Consolidated Statement of Income Caption Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In Thousands) Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity $ — $ 6,736 $ 30,037 $ 66,967 Investment securities gains, net (1,844 ) (1,886 ) (4,615 ) (8,559 ) Interest on investment securities held to maturity (1,844 ) 4,850 25,422 58,408 676 (2,112 ) (9,311 ) (25,426 ) Income tax (expense) benefit $ (1,168 ) $ 2,738 $ 16,111 $ 32,982 Net of tax Accumulated Gains (Losses) on Cash Flow Hedging Instruments $ 1,654 $ 3,646 $ 5,587 $ 9,985 Interest and fees on loans (952 ) (1,722 ) (3,909 ) (5,207 ) Interest and fees on FHLB advances 702 1,924 1,678 4,778 (260 ) (839 ) (619 ) (2,081 ) Income tax expense $ 442 $ 1,085 $ 1,059 $ 2,697 Net of tax Defined Benefit Plan Adjustment $ — $ — $ (1,300 ) $ (2,716 ) (2) — — 369 1,001 Income tax benefit $ — $ — $ (931 ) $ (1,715 ) Net of tax Unamortized Impairment Losses on Investment Securities Held to Maturity $ (354 ) $ (515 ) $ (1,021 ) $ (1,247 ) Interest on investment securities held to maturity 129 225 373 543 Income tax benefit $ (225 ) $ (290 ) $ (648 ) $ (704 ) 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 19, Benefit Plans, in the Notes to the December 31, 2015, Consolidated Financial Statements for additional details).

Supplemental Disclosure for S31

Supplemental Disclosure for Statement of Cash Flows (Tables)	9 Months Ended
	Sep. 30, 2016
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. Nine Months Ended September 30, 2016 2015 (In Thousands) Supplemental disclosures of cash flow information: Interest paid $ 339,345 $ 277,140 Net income taxes paid 94,808 145,056 Supplemental schedule of noncash investing and financing activities: Transfer of loans and loans held for sale to OREO $ 21,547 $ 16,552 Transfer of loans to loans held for sale 764,022 906,857 Change in unrealized gains (losses) on available for sale securities 73,470 2,574 Issuance of restricted stock, net of cancellations 1,083 458

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
Segment Information (Tables)	Sep. 30, 2016
Segment Reporting [Abstract]
Schedule of segment reporting information	The following tables present the segment information for the Company’s segments. Three Months Ended September 30, 2016 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 562,339 $ 26,338 $ (1,512 ) $ (72,356 ) $ 514,809 Allocated provision for loan losses 52,358 18,208 — (5,459 ) 65,107 Noninterest income 209,131 50,804 7,960 (4,130 ) 263,765 Noninterest expense 476,830 34,679 5,101 39,661 556,271 Net income (loss) before income tax expense (benefit) 242,282 24,255 1,347 (110,688 ) 157,196 Income tax expense (benefit) 84,799 8,489 471 (56,914 ) 36,845 Net income (loss) 157,483 15,766 876 (53,774 ) 120,351 Less: net income attributable to noncontrolling interests 107 — 420 (4 ) 523 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 157,376 $ 15,766 $ 456 $ (53,770 ) $ 119,828 Average assets $ 56,486,459 $ 10,980,519 $ 16,462,880 $ 6,970,481 $ 90,900,339 Three Months Ended September 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 508,900 $ 40,505 $ 6,228 $ (47,759 ) $ 507,874 Allocated provision for loan losses 27,562 24,466 — (22,877 ) 29,151 Noninterest income 221,063 27,514 7,879 4,264 260,720 Noninterest expense 469,335 38,044 4,656 45,340 557,375 Net income (loss) before income tax expense (benefit) 233,066 5,509 9,451 (65,958 ) 182,068 Income tax expense (benefit) 81,573 1,928 3,308 (34,381 ) 52,428 Net income (loss) 151,493 3,581 6,143 (31,577 ) 129,640 Less: net income attributable to noncontrolling interests 65 — 426 — 491 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 151,428 $ 3,581 $ 5,717 $ (31,577 ) $ 129,149 Average assets $ 55,341,631 $ 12,578,897 $ 15,085,951 $ 6,879,618 $ 89,886,097 Nine Months Ended September 30, 2016 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 1,659,588 $ 102,050 $ (18,114 ) $ (207,595 ) $ 1,535,929 Allocated provision for loan losses 167,559 87,729 — 9,737 265,025 Noninterest income 622,523 138,982 47,407 (13,696 ) 795,216 Noninterest expense 1,424,343 144,047 15,289 105,773 1,689,452 Net income (loss) before income tax expense (benefit) 690,209 9,256 14,004 (336,801 ) 376,668 Income tax expense (benefit) 241,573 3,239 4,901 (155,165 ) 94,548 Net income (loss) 448,636 6,017 9,103 (181,636 ) 282,120 Less: net income attributable to noncontrolling interests 306 — 1,271 (8 ) 1,569 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 448,330 $ 6,017 $ 7,832 $ (181,628 ) $ 280,551 Average assets $ 56,541,683 $ 11,960,225 $ 16,395,875 $ 6,980,644 $ 91,878,427 Nine Months Ended September 30, 2015 Consumer and Commercial Banking Corporate and Investment Banking Treasury Corporate Support and Other Consolidated (In Thousands) Net interest income (expense) $ 1,485,992 $ 119,259 $ 25,026 $ (121,389 ) $ 1,508,888 Allocated provision for loan losses 79,477 41,714 — (3,860 ) 117,331 Noninterest income 627,255 117,131 71,072 1,718 817,176 Noninterest expense 1,361,989 115,572 14,683 143,914 1,636,158 Net income (loss) before income tax expense (benefit) 671,781 79,104 81,415 (259,725 ) 572,575 Income tax expense (benefit) 235,123 27,686 28,495 (134,439 ) 156,865 Net income (loss) 436,658 51,418 52,920 (125,286 ) 415,710 Less: net income attributable to noncontrolling interests 448 — 1,290 — 1,738 Net income (loss) attributable to BBVA Compass Bancshares, Inc. $ 436,210 $ 51,418 $ 51,630 $ (125,286 ) $ 413,972 Average assets $ 54,040,909 $ 12,459,085 $ 14,288,092 $ 6,909,436 $ 87,697,522

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
Related Party Transactions (Tables)	Sep. 30, 2016
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. September 30, 2016 December 31, 2015 (In Thousands) Derivative contracts: Fair value hedges $ 34,082 $ (9,405 ) Cash flow hedges (389 ) (40 ) Free-standing derivatives not designated as hedging instruments (58,934 ) (20,082 ) 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. September 30, 2016 December 31, 2015 (In Thousands) Securities purchased under agreements to resell $ 16,406 $ 26,404 Securities sold under agreements to repurchase 82,942 74,049

Acquisition Activity - Narrativ

Acquisition Activity - Narrative (Details) $ in Thousands	Jun. 06, 2016USD ($)subsidiary	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Business Combinations [Abstract]
Number of entities under common control acquired \| subsidiary	4
Cash payment to purchase entities under common control	$ 69,200	$ 69,151	$ 0
Total net assets acquired from entities under common control				$ 103,000

Acquisition Activity - Balance

Acquisition Activity - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Assets:
Cash and cash equivalents	$ 4,426,691	$ 4,496,828	$ 4,428,256	$ 3,432,948
Premises and equipment, net	1,287,457	1,322,378
Other assets	1,585,863	1,310,091
Total assets	89,356,838	90,068,538
Liabilities:
Deposits	67,587,337	65,981,766
Accrued expenses and other liabilities	1,521,654	1,240,645
Total liabilities	76,537,648	77,443,829
Shareholder’s equity	12,819,190	12,624,709	$ 12,443,728	$ 12,054,922
Total liabilities and shareholder’s equity	$ 89,356,838	90,068,538
As Previously Reported
Assets:
Cash and cash equivalents		4,452,892
Premises and equipment, net		1,320,163
Other assets		1,252,784
Total assets		89,965,080
Liabilities:
Deposits		65,980,530
Accrued expenses and other liabilities		1,185,848
Total liabilities		77,387,796
Shareholder’s equity		12,577,284
Total liabilities and shareholder’s equity		89,965,080
Retrospective Adjustments
Assets:
Cash and cash equivalents		43,936
Premises and equipment, net		2,215
Other assets		57,307
Total assets		103,458
Liabilities:
Deposits		1,236
Accrued expenses and other liabilities		54,797
Total liabilities		56,033
Shareholder’s equity		47,425
Total liabilities and shareholder’s equity		$ 103,458

Acquisition Activity - Income S

Acquisition Activity - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Interest income	$ 630,542	$ 610,213	$ 1,883,433	$ 1,821,294
Noninterest income	263,765	260,720	795,216	817,176
Noninterest expense	556,271	557,375	1,689,452	1,636,158
Income tax expense	36,845	52,428	94,548	156,865
Net income	$ 120,351	129,640	$ 282,120	415,710
As Previously Reported
Business Acquisition [Line Items]
Interest income		610,206		1,821,284
Noninterest income		233,376		741,215
Noninterest expense		536,250		1,578,605
Income tax expense		50,110		150,008
Net income		125,732		404,149
Retrospective Adjustments
Business Acquisition [Line Items]
Interest income		7		10
Noninterest income		27,344		75,961
Noninterest expense		21,125		57,553
Income tax expense		2,318		6,857
Net income		$ 3,908		$ 11,561

Investment Securities Availab37

Investment Securities Available for Sale and Investment Securities Held to Maturity - Adjusted cost and fair value of securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	$ 11,505,595	$ 11,112,700
Available-for-sale Securities, Gross Unrealized Gain	66,444	29,432
Available-for-sale Securities, Gross Unrealized Losses	55,154	91,612
Investment securities available for sale	11,516,885	11,050,520
Investment securities held to maturity:
Held-to-maturity Securities, Amortized Cost Basis	1,240,850	1,322,676
Held-to-maturity Securities, Gross Unrealized Gain	25,776	12,397
Held-to-maturity Securities, Gross Unrealized Losses	25,392	90,952
Investment securities held to maturity, estimated fair value	1,241,234	1,244,121
U.S. Treasury and other U.S. government agencies
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	1,856,178	3,232,238
Available-for-sale Securities, Gross Unrealized Gain	10,178	4,076
Available-for-sale Securities, Gross Unrealized Losses	16,126	24,822
Investment securities available for sale	1,850,230	3,211,492
Mortgage-backed securities
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	3,988,469	4,624,441
Available-for-sale Securities, Gross Unrealized Gain	36,732	16,548
Available-for-sale Securities, Gross Unrealized Losses	19,564	50,727
Investment securities available for sale	4,005,637	4,590,262
Collateralized mortgage obligations
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	5,207,807	2,713,075
Available-for-sale Securities, Gross Unrealized Gain	18,842	8,200
Available-for-sale Securities, Gross Unrealized Losses	19,432	16,019
Investment securities available for sale	5,207,217	2,705,256
Investment securities held to maturity:
Held-to-maturity Securities, Amortized Cost Basis	88,611	103,947
Held-to-maturity Securities, Gross Unrealized Gain	4,733	6,022
Held-to-maturity Securities, Gross Unrealized Losses	5,460	4,634
Investment securities held to maturity, estimated fair value	87,884	105,335
State and political subdivisions
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	9,787	15,492
Available-for-sale Securities, Gross Unrealized Gain	288	395
Available-for-sale Securities, Gross Unrealized Losses	0	0
Investment securities available for sale	10,075	15,887
Investment securities held to maturity:
Held-to-maturity Securities, Amortized Cost Basis	1,070,917	1,128,240
Held-to-maturity Securities, Gross Unrealized Gain	17,667	729
Held-to-maturity Securities, Gross Unrealized Losses	16,516	82,632
Investment securities held to maturity, estimated fair value	1,072,068	1,046,337
Other
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	16,528	23,914
Available-for-sale Securities, Gross Unrealized Gain	356	175
Available-for-sale Securities, Gross Unrealized Losses	32	44
Investment securities available for sale	16,852	24,045
Investment securities held to maturity:
Held-to-maturity Securities, Amortized Cost Basis	64,178	66,478
Held-to-maturity Securities, Gross Unrealized Gain	1,417	2,644
Held-to-maturity Securities, Gross Unrealized Losses	1,951	2,112
Investment securities held to maturity, estimated fair value	63,644	67,010
Equity Securities
Investment securities available for sale:
Available-for-sale securities, amortized cost basis	426,826	503,540
Available-for-sale Securities, Gross Unrealized Gain	48	38
Available-for-sale Securities, Gross Unrealized Losses	0	0
Investment securities available for sale	426,874	503,578
Asset-backed securities
Investment securities held to maturity:
Held-to-maturity Securities, Amortized Cost Basis	17,144	24,011
Held-to-maturity Securities, Gross Unrealized Gain	1,959	3,002
Held-to-maturity Securities, Gross Unrealized Losses	1,465	1,574
Investment securities held to maturity, estimated fair value	$ 17,638	$ 25,439

Investment Securities Availab38

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	Sep. 30, 2016	Dec. 31, 2015
Investment securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	$ 3,008,056	$ 6,026,410
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	19,201	47,281
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	2,811,988	2,262,517
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	35,953	44,331
Available-for-sale securities, fair value	5,820,044	8,288,927
Available-for-sale securities, unrealized losses	55,154	91,612
Investment securities held to maturity:
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	78,605	84,368
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	5,005	6,859
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	390,040	866,895
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	20,387	84,093
Held-to-maturity securities, fair value	468,645	951,263
Held-to-maturity securities unrealized losses	25,392	90,952
U.S. Treasury and other U.S. government agencies
Investment securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	386,626	2,081,528
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	4,012	16,523
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	604,317	460,160
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	12,114	8,299
Available-for-sale securities, fair value	990,943	2,541,688
Available-for-sale securities, unrealized losses	16,126	24,822
Mortgage-backed securities
Investment securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	301,922	2,623,761
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	2,182	20,380
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	1,502,080	1,408,069
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	17,382	30,347
Available-for-sale securities, fair value	1,804,002	4,031,830
Available-for-sale securities, unrealized losses	19,564	50,727
Collateralized mortgage obligations
Investment securities available for sale:
Available-for-sale securities, securities in a loss position for less than 12 months, fair value	2,319,508	1,321,121
Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses	13,007	10,378
Available-for-sale securities, securities in a loss position for 12 months or longer, fair value	704,501	393,210
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	6,425	5,641
Available-for-sale securities, fair value	3,024,009	1,714,331
Available-for-sale securities, unrealized losses	19,432	16,019
Investment securities held to maturity:
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	4,099	11,066
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	519	326
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	50,858	52,601
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	4,941	4,308
Held-to-maturity securities, fair value	54,957	63,667
Held-to-maturity securities unrealized losses	5,460	4,634
State and political subdivisions
Investment securities held to maturity:
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	57,577	73,302
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	4,378	6,533
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	325,680	794,489
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	12,138	76,099
Held-to-maturity securities, fair value	383,257	867,791
Held-to-maturity securities unrealized losses	16,516	82,632
Other
Investment securities available for sale:
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	1,090	1,078
Available-for-sale securities, Securities in a loss position for 12 months or longer, unrealized losses	32	44
Available-for-sale securities, fair value	1,090	1,078
Available-for-sale securities, unrealized losses	32	44
Investment securities held to maturity:
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	16,504	0
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	94	0
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	3,538	4,015
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	1,857	2,112
Held-to-maturity securities, fair value	20,042	4,015
Held-to-maturity securities unrealized losses	1,951	2,112
Asset-backed securities
Investment securities held to maturity:
Held-to-maturity securities, securities in a loss position for less than 12 months, fair value	425	0
Held-to-maturity securities, securities in a loss position for less than 12 months, unrealized losses	14	0
Held-to-maturity securities, securities in a loss position for 12 months or longer, fair value	9,964	15,790
Held-to-maturity securities, securities in a loss position for 12 months or longer, unrealized losses	1,451	1,574
Held-to-maturity securities, fair value	10,389	15,790
Held-to-maturity securities unrealized losses	$ 1,465	$ 1,574

Investment Securities Availab39

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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than temporary impairment recognized in other comprehensive income, beginning of period	$ 22,582	$ 22,421	$ 22,452	$ 21,123
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	0	0	0	1,013
Additions for the credit component on debt securities in which OTTI was previously recognized	0	0	130	285
Other than temporary impairment recognized in other comprehensive income, end of period	$ 22,582	$ 22,421	$ 22,582	$ 22,421

Investment Securities Availab40

Investment Securities Available for Sale and Investment Securities Held to Maturity - Maturities of securities portfolios (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment securities available for sale, amortized cost [Abstract]
Maturing within one year	$ 91,838
Maturing after one but within five years	365,562
Maturing after five but within ten years	367,002
Maturing after ten years	1,058,091
Total single date maturities	1,882,493
Mortgage-backed securities and collateralized mortgage obligations	9,196,276
Available-for-sale securities, amortized cost basis	11,505,595	$ 11,112,700
Investment securities available for sale, fair value [Abstract]
Maturing within one year	91,868
Maturing after one but within five years	369,917
Maturing after five but within ten years	370,969
Maturing after ten years	1,044,403
Total single date maturities	1,877,157
Mortgage-backed securities and collateralized mortgage obligations	9,212,854
Investment securities available for sale	11,516,885	11,050,520
Held-to-maturity securities, amortized cost [Abstract]
Maturing within one year	67,853
Maturing after one but within five years	244,188
Maturing after five but within ten years	260,272
Maturing after ten years	579,926
Total single date maturities	1,152,239
Collateralized mortgage obligations	88,611
Total	1,240,850	1,322,676
Held-to-maturity securities, fair value [Abstract]
Maturing within one year	68,283
Maturing after one but within five years	243,803
Maturing after five but within ten years	258,962
Maturing after ten years	582,302
Total single date maturities	1,153,350
Collateralized mortgage obligations	87,884
Total Investments Securities Held to Maturity	1,241,234	1,244,121
Equity Securities
Investment securities available for sale, amortized cost [Abstract]
Available-for-sale securities, amortized cost basis	426,826	503,540
Investment securities available for sale, fair value [Abstract]
Investment securities available for sale	$ 426,874	$ 503,578

Investment Securities Availab41

Investment Securities Available for Sale and Investment Securities Held to Maturity - Gross Realized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Gross gains	$ 0	$ 8,568	$ 30,037	$ 68,799
Gross losses	0	1,832	0	1,832
Net realized gains	$ 0	$ 6,736	$ 30,037	$ 66,967

Investment Securities Availab42

Investment Securities Available for Sale and Investment Securities Held to Maturity - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Federal home loan bank and federal reserve stock carried at par value	$ 427,000		$ 427,000		$ 503,000
Securities impairment	$ 0	$ 0	$ 130	$ 1,298

Loans and Allowance for Loan 43

Loans and Allowance for Loan Losses - Composition of loan portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Line Items]
Covered loans	$ 381,111	$ 440,961
Total loans	60,211,283	61,324,084
Commercial, Financial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,839,068	26,022,374
Commercial Real Estate \| Real estate – construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,215,272	2,354,253
Commercial Real Estate \| Commercial real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,361,630	10,453,280
Residential Real Estate \| Residential real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	13,457,435	13,993,285
Residential Real Estate \| Equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,494,468	2,419,815
Residential Real Estate \| Equity loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	479,375	580,804
Consumer \| Credit card
Loans and Leases Receivable Disclosure [Line Items]
Loans	599,862	627,359
Consumer \| Consumer direct
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,186,827	936,871
Consumer \| Consumer indirect
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,196,235	3,495,082
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	38,415,970	38,829,907
Commercial \| Commercial, Financial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,839,068	26,022,374
Commercial \| Commercial Real Estate \| Real estate – construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,215,272	2,354,253
Commercial \| Commercial Real Estate \| Commercial real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,361,630	10,453,280
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	21,414,202	22,053,216
Consumer \| Residential Real Estate \| Residential real estate – mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	13,457,435	13,993,285
Consumer \| Residential Real Estate \| Equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,494,468	2,419,815
Consumer \| Residential Real Estate \| Equity loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	479,375	580,804
Consumer \| Consumer \| Credit card
Loans and Leases Receivable Disclosure [Line Items]
Loans	599,862	627,359
Consumer \| Consumer \| Consumer direct
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,186,827	936,871
Consumer \| Consumer \| Consumer indirect
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 3,196,235	$ 3,495,082

Loans and Allowance for Loan 44

Loans and Allowance for Loan Losses - Allowances for loan losses activity (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, covered, beginning of period		$ 0	$ 1,886	$ 1,440	$ 2,808
Allowance for loan losses, total loans, beginning of period		843,051	721,471	762,673	685,041
Provision (credit) for loan losses		65,107	29,151	265,025	117,331
Provision (credit) for loan losses, covered		0	469	124	572
Provision (credit) for loan losses, total loans		65,107	29,151	265,025	117,331
Loans charged off, covered		0	(490)	(1,565)	(1,516)
Loans charged off, total loans		(64,886)	(44,072)	(212,340)	(124,448)
Loan recoveries, covered		0	2	1	3
Loan recoveries, total loans		18,808	15,572	46,722	44,198
Net (charge offs) recoveries, covered		0	(488)	(1,564)	(1,513)
Net (charge offs) recoveries, total loans		(46,078)	(28,500)	(165,618)	(80,250)
Allowance for loan losses, covered, end of period		0	1,867	0	1,867
Allowance for loan losses, total loans, end of period		862,080	722,122	862,080	722,122
Commercial, Financial and Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period		499,398	350,879	402,113	299,482
Provision (credit) for loan losses		20,533	16,424	167,648	74,127
Loans charged off		(13,702)	(9,161)	(66,541)	(20,706)
Loan recoveries		4,766	5,171	7,775	10,410
Net (charge offs) recoveries		(8,936)	(3,990)	(58,766)	(10,296)
Allowance for loan losses, end of period		510,995	363,313	510,995	363,313
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	[1]	114,311	135,152	122,068	138,233
Provision (credit) for loan losses	[1]	54	(7,256)	(7,393)	(12,995)
Loans charged off	[1]	(104)	(910)	(3,555)	(2,380)
Loan recoveries	[1]	682	899	3,823	5,027
Net (charge offs) recoveries	[1]	578	(11)	268	2,647
Allowance for loan losses, end of period	[1]	114,943	127,885	114,943	127,885
Residential Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	[2]	119,076	133,995	132,104	154,627
Provision (credit) for loan losses	[2]	528	(577)	(7,412)	(13,458)
Loans charged off	[2]	(4,608)	(5,944)	(15,072)	(20,889)
Loan recoveries	[2]	3,429	3,772	8,805	10,966
Net (charge offs) recoveries	[2]	(1,179)	(2,172)	(6,267)	(9,923)
Allowance for loan losses, end of period	[2]	118,425	131,246	118,425	131,246
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	[3]	110,266	99,559	104,948	89,891
Provision (credit) for loan losses	[3]	43,992	20,091	112,058	69,085
Loans charged off	[3]	(46,472)	(27,567)	(125,607)	(78,957)
Loan recoveries	[3]	9,931	5,728	26,318	17,792
Net (charge offs) recoveries	[3]	(36,541)	(21,839)	(99,289)	(61,165)
Allowance for loan losses, end of period	[3]	$ 117,717	$ 97,811	$ 117,717	$ 97,811

[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 - Allowance for loan losses by portfolio (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Ending balance of allowance attributable to loans:
Individually evaluated for impairment		$ 179,694		$ 71,217
Collectively evaluated for impairment		682,386		689,847
Purchased loans, covered		0		1,440
Purchased loans, covered and not covered		0		1,609
Total allowance for loan losses, covered		0	$ 0	1,440	$ 1,867	$ 1,886	$ 2,808
Total allowance for loan losses, total loans		862,080	843,051	762,673	722,122	721,471	685,041
Ending balance of loans:
Individually evaluated for impairment		1,062,347		429,586
Collectively evaluated for impairment		58,701,533		60,374,619
Purchased loans, covered		381,111		440,961
Purchased loans, covered and not covered		447,403		519,879
Total loans, covered		381,111		440,961
Total loans		60,211,283		61,324,084
Commercial, Financial and Agricultural
Ending balance of allowance attributable to loans:
Individually evaluated for impairment		138,067		27,486
Collectively evaluated for impairment		372,928		374,458
Purchased loans		0		169
Total allowance for loan losses		510,995	499,398	402,113	363,313	350,879	299,482
Ending balance of loans:
Individually evaluated for impairment		839,679		163,201
Collectively evaluated for impairment		23,972,927		25,828,286
Purchased loans		26,462		30,887
Total loans		24,839,068		26,022,374
Commercial Real Estate
Ending balance of allowance attributable to loans:
Individually evaluated for impairment	[1]	3,253		3,725
Collectively evaluated for impairment	[1]	111,690		118,343
Purchased loans	[1]	0		0
Total allowance for loan losses	[1]	114,943	114,311	122,068	127,885	135,152	138,233
Ending balance of loans:
Individually evaluated for impairment	[1]	38,967		80,123
Collectively evaluated for impairment	[1]	13,503,337		12,685,320
Purchased loans	[1]	34,598		42,090
Total loans	[1]	13,576,902		12,807,533
Residential Real Estate
Ending balance of allowance attributable to loans:
Individually evaluated for impairment	[2]	35,867		38,126
Collectively evaluated for impairment	[2]	82,558		93,978
Purchased loans	[2]	0		0
Total allowance for loan losses	[2]	118,425	119,076	132,104	131,246	133,995	154,627
Ending balance of loans:
Individually evaluated for impairment	[2]	180,308		183,473
Collectively evaluated for impairment	[2]	16,250,039		16,809,525
Purchased loans	[2]	931		906
Total loans	[2]	16,431,278		16,993,904
Consumer
Ending balance of allowance attributable to loans:
Individually evaluated for impairment	[3]	2,507		1,880
Collectively evaluated for impairment	[3]	115,210		103,068
Purchased loans	[3]	0		0
Total allowance for loan losses	[3]	117,717	$ 110,266	104,948	$ 97,811	$ 99,559	$ 89,891
Ending balance of loans:
Individually evaluated for impairment	[3]	3,393		2,789
Collectively evaluated for impairment	[3]	4,975,230		5,051,488
Purchased loans	[3]	4,301		5,035
Total loans	[3]	$ 4,982,924		$ 5,059,312

[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 46

Loans and Allowance for Loan Losses - Impaired loans by loan class (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	$ 435,166		$ 435,166		$ 80,358
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	444,453		444,453		91,318
Individually evaluated impaired loans with a recorded allowance, recorded investment	627,181		627,181		349,228
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	655,707		655,707		360,411
Individually evaluated impaired loans with a recorded allowance, allowance	179,694		179,694		71,217
Individually evaluated impaired loans, average recorded investment	990,320	$ 411,668	807,054	$ 379,989
Individually evaluated impaired loans, interest income recognized	1,955	2,124	5,868	6,783
Commercial, Financial and Agricultural
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	420,005		420,005		45,583
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	428,688		428,688		53,325
Individually evaluated impaired loans with a recorded allowance, recorded investment	419,674		419,674		117,618
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	445,592		445,592		122,148
Individually evaluated impaired loans with a recorded allowance, allowance	138,067		138,067		27,486
Individually evaluated impaired loans, average recorded investment	769,719	133,652	575,038	98,110
Individually evaluated impaired loans, interest income recognized	401	204	1,033	909
Commercial Real Estate \| Real estate – construction
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		3,403
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		3,986
Individually evaluated impaired loans with a recorded allowance, recorded investment	707		707		628
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	819		819		689
Individually evaluated impaired loans with a recorded allowance, allowance	377		377		515
Individually evaluated impaired loans, average recorded investment	634	5,360	2,118	5,837
Individually evaluated impaired loans, interest income recognized	2	21	6	97
Commercial Real Estate \| Commercial real estate – mortgage
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	15,161		15,161		24,851
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	15,765		15,765		27,486
Individually evaluated impaired loans with a recorded allowance, recorded investment	23,099		23,099		51,241
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	24,498		24,498		54,863
Individually evaluated impaired loans with a recorded allowance, allowance	2,876		2,876		3,210
Individually evaluated impaired loans, average recorded investment	36,874	87,352	46,073	85,862
Individually evaluated impaired loans, interest income recognized	255	517	932	1,634
Residential Real Estate \| Residential real estate – mortgage
Financing Receivable, Impaired [Line Items]
Individually evaluated impaired loans with no recorded allowance, recorded investment	0		0		6,521
Individually evaluated impaired loans with no recorded allowance, unpaid principle balance	0		0		6,521
Individually evaluated impaired loans with a recorded allowance, recorded investment	111,773		111,773		102,375
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	111,773		111,773		102,375
Individually evaluated impaired loans with a recorded allowance, allowance	9,226		9,226		7,370
Individually evaluated impaired loans, average recorded investment	110,262	107,927	109,020	110,790
Individually evaluated impaired loans, interest income recognized	666	707	1,953	2,096
Residential Real Estate \| 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	25,679		25,679		28,164
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	26,069		26,069		30,302
Individually evaluated impaired loans with a recorded allowance, allowance	20,572		20,572		23,183
Individually evaluated impaired loans, average recorded investment	26,231	27,185	27,170	26,891
Individually evaluated impaired loans, interest income recognized	246	279	790	838
Residential Real Estate \| 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	42,856		42,856		46,413
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	43,563		43,563		47,245
Individually evaluated impaired loans with a recorded allowance, allowance	6,069		6,069		7,573
Individually evaluated impaired loans, average recorded investment	43,292	48,046	44,629	50,168
Individually evaluated impaired loans, interest income recognized	375	392	1,123	1,197
Consumer \| 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
Individually evaluated impaired loans, average recorded investment	0	0	0	0
Individually evaluated impaired loans, interest income recognized	0	0	0	0
Consumer \| 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	797		797		935
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	797		797		935
Individually evaluated impaired loans with a recorded allowance, allowance	56		56		26
Individually evaluated impaired loans, average recorded investment	803	397	854	686
Individually evaluated impaired loans, interest income recognized	7	4	22	12
Consumer \| 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	2,596		2,596		1,854
Individually evaluated impaired loans with a recorded allowance, unpaid principle balance	2,596		2,596		1,854
Individually evaluated impaired loans with a recorded allowance, allowance	2,451		2,451		$ 1,854
Individually evaluated impaired loans, average recorded investment	2,505	1,749	2,152	1,645
Individually evaluated impaired loans, interest income recognized	$ 3	$ 0	$ 9	$ 0

Loans and Allowance for Loan 47

Loans and Allowance for Loan Losses - Credit quality indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commercial, Financial and Agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	$ 24,839,068	$ 26,022,374
Commercial Real Estate \| Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,215,272	2,354,253
Commercial Real Estate \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	11,361,630	10,453,280
Residential Real Estate \| Residential real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	13,457,435	13,993,285
Residential Real Estate \| Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,494,468	2,419,815
Residential Real Estate \| Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	479,375	580,804
Consumer \| Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	599,862	627,359
Consumer \| Consumer direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,186,827	936,871
Consumer \| Consumer indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,196,235	3,495,082
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	38,415,970	38,829,907
Commercial \| Commercial, Financial and Agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	24,839,068	26,022,374
Commercial \| Commercial, Financial and Agricultural \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	22,686,955	24,823,312
Commercial \| Commercial, Financial and Agricultural \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	665,237	469,400
Commercial \| Commercial, Financial and Agricultural \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,164,997	688,427
Commercial \| Commercial, Financial and Agricultural \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	321,879	41,235
Commercial \| Commercial Real Estate \| Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,215,272	2,354,253
Commercial \| Commercial Real Estate \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	11,361,630	10,453,280
Commercial \| Commercial Real Estate \| Pass \| Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,154,286	2,340,145
Commercial \| Commercial Real Estate \| Pass \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	11,031,439	10,165,630
Commercial \| Commercial Real Estate \| Special Mention \| Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	56,486	5,148
Commercial \| Commercial Real Estate \| Special Mention \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	209,917	142,124
Commercial \| Commercial Real Estate \| Substandard \| Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	4,485	8,941
Commercial \| Commercial Real Estate \| Substandard \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	102,879	133,091
Commercial \| Commercial Real Estate \| Doubtful \| Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	15	19
Commercial \| Commercial Real Estate \| Doubtful \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	17,395	12,435
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	21,414,202	22,053,216
Consumer \| Residential Real Estate \| Residential real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	13,457,435	13,993,285
Consumer \| Residential Real Estate \| Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,494,468	2,419,815
Consumer \| Residential Real Estate \| Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	479,375	580,804
Consumer \| Residential Real Estate \| Performing \| Residential real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	13,335,843	13,877,592
Consumer \| Residential Real Estate \| Performing \| Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,459,409	2,381,909
Consumer \| Residential Real Estate \| Performing \| Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	465,626	564,110
Consumer \| Residential Real Estate \| Nonperforming \| Residential real estate – mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	121,592	115,693
Consumer \| Residential Real Estate \| Nonperforming \| Equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	35,059	37,906
Consumer \| Residential Real Estate \| Nonperforming \| Equity loans
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	13,749	16,694
Consumer \| Consumer \| Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	599,862	627,359
Consumer \| Consumer \| Consumer direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,186,827	936,871
Consumer \| Consumer \| Consumer indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,196,235	3,495,082
Consumer \| Consumer \| Performing \| Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	589,687	617,641
Consumer \| Consumer \| Performing \| Consumer direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,181,871	932,773
Consumer \| Consumer \| Performing \| Consumer indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,182,146	3,484,426
Consumer \| Consumer \| Nonperforming \| Credit card
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	10,175	9,718
Consumer \| Consumer \| Nonperforming \| Consumer direct
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	4,956	4,098
Consumer \| Consumer \| Nonperforming \| Consumer indirect
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	$ 14,089	$ 10,656

Loans and Allowance for Loan 48

Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual, Covered	$ 269	$ 134
Accruing TDRs, Covered	0	0
Total Past Due and Impaired, Covered	36,693	46,422
Not Past Due or Impaired, Covered	344,418	394,539
Total loans, covered	381,111	440,961
Nonaccrual, Total Loans	1,086,018	407,045
Accruing TDRs, Total Loans	117,559	150,912
Total Past Due and Impaired, Total Loans	1,580,625	855,859
Not Past Due or Impaired, Total Loans	58,630,658	60,468,225
Total loans	60,211,283	61,324,084
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due, Covered	4,075	4,862
Financing Receivable, Past Due, Total Loans	245,323	168,357
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due, Covered	3,844	3,454
Financing Receivable, Past Due, Total Loans	66,200	60,916
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due, Covered	28,505	37,972
Financing Receivable, Past Due, Total Loans	65,525	68,629
Commercial, Financial and Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	850,075	161,591
Accruing TDRs	9,283	9,402
Total Past Due and Impaired	941,406	186,972
Not Past Due or Impaired	23,897,662	25,835,402
Total	24,839,068	26,022,374
Commercial, Financial and Agricultural \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	72,328	8,197
Commercial, Financial and Agricultural \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	4,400	4,215
Commercial, Financial and Agricultural \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	5,320	3,567
Commercial Real Estate \| Real estate – construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,214	5,908
Accruing TDRs	3,315	2,247
Total Past Due and Impaired	8,895	11,531
Not Past Due or Impaired	2,206,377	2,342,722
Total	2,215,272	2,354,253
Commercial Real Estate \| Real estate – construction \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	522	2,864
Commercial Real Estate \| Real estate – construction \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	1,062	91
Commercial Real Estate \| Real estate – construction \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	2,782	421
Commercial Real Estate \| Commercial real estate – mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	63,593	69,953
Accruing TDRs	5,141	33,904
Total Past Due and Impaired	77,500	111,398
Not Past Due or Impaired	11,284,130	10,341,882
Total	11,361,630	10,453,280
Commercial Real Estate \| Commercial real estate – mortgage \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	7,614	3,843
Commercial Real Estate \| Commercial real estate – mortgage \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	369	1,461
Commercial Real Estate \| Commercial real estate – mortgage \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	783	2,237
Residential Real Estate \| Residential real estate – mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	117,243	113,234
Accruing TDRs	63,008	67,343
Total Past Due and Impaired	261,584	249,401
Not Past Due or Impaired	13,195,851	13,743,884
Total	13,457,435	13,993,285
Residential Real Estate \| Residential real estate – mortgage \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	56,204	47,323
Residential Real Estate \| Residential real estate – mortgage \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	21,200	19,540
Residential Real Estate \| Residential real estate – mortgage \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	3,929	1,961
Residential Real Estate \| Equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	32,642	35,023
Accruing TDRs	0	0
Total Past Due and Impaired	47,709	50,540
Not Past Due or Impaired	2,446,759	2,369,275
Total	2,494,468	2,419,815
Residential Real Estate \| Equity lines of credit \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	8,173	8,263
Residential Real Estate \| Equity lines of credit \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	4,477	4,371
Residential Real Estate \| Equity lines of credit \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	2,417	2,883
Residential Real Estate \| Equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	13,198	15,614
Accruing TDRs	36,053	37,108
Total Past Due and Impaired	56,865	61,976
Not Past Due or Impaired	422,510	518,828
Total	479,375	580,804
Residential Real Estate \| Equity loans \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	5,567	6,356
Residential Real Estate \| Equity loans \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	1,694	2,194
Residential Real Estate \| Equity loans \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	353	704
Consumer \| Credit card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Accruing TDRs	0	0
Total Past Due and Impaired	20,135	19,903
Not Past Due or Impaired	579,727	607,456
Total	599,862	627,359
Consumer \| Credit card \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	5,696	5,563
Consumer \| Credit card \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	4,264	4,622
Consumer \| Credit card \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	10,175	9,718
Consumer \| Consumer direct
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	765	561
Accruing TDRs	759	908
Total Past Due and Impaired	22,539	16,455
Not Past Due or Impaired	1,164,288	920,416
Total	1,186,827	936,871
Consumer \| Consumer direct \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	12,099	7,648
Consumer \| Consumer direct \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	4,725	3,801
Consumer \| Consumer direct \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	4,191	3,537
Consumer \| Consumer indirect
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	7,019	5,027
Accruing TDRs	0	0
Total Past Due and Impaired	107,299	101,261
Not Past Due or Impaired	3,088,936	3,393,821
Total	3,196,235	3,495,082
Consumer \| Consumer indirect \| 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	73,045	73,438
Consumer \| Consumer indirect \| 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	20,165	17,167
Consumer \| Consumer indirect \| 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Past Due	$ 7,070	$ 5,629

Loans and Allowance for Loan 49

Loans and Allowance for Loan Losses - Troubled debt restructurings (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
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	27	8
Total Past Due and Nonaccrual, Covered	27	8
Not Past Due or Nonaccrual, Covered	0	0
Total, Covered	27	8
30 - 59 Days Past Due, Total Loans	5,262	3,925
60 - 89 Days Past Due, Total Loans	1,155	2,717
90 Days or More Past Due, Total Loans	618	874
Nonaccrual, Total Loans	103,256	76,913
Total Past Due and Nonaccrual, Total Loans	110,291	84,429
Not Past Due or Nonaccrual, Total Loans	110,524	143,396
Total Loans	220,815	227,825
Commercial, Financial and Agricultural
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	33	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Nonaccrual	28,739	131
Total Past Due and Nonaccrual	28,772	131
Not Past Due or Nonaccrual	9,250	9,402
Total	38,022	9,533
Commercial Real Estate \| 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	585	495
Total Past Due and Nonaccrual	585	495
Not Past Due or Nonaccrual	3,315	2,247
Total	3,900	2,742
Commercial Real Estate \| Commercial real estate – mortgage
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	4,136	7,205
Total Past Due and Nonaccrual	4,136	7,205
Not Past Due or Nonaccrual	5,141	33,904
Total	9,277	41,109
Residential Real Estate \| Residential real estate – mortgage
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	3,392	2,188
60-89 Days Past Due	389	1,935
90 Days or More Past Due	420	498
Nonaccrual	35,562	30,174
Total Past Due and Nonaccrual	39,763	34,795
Not Past Due or Nonaccrual	58,807	62,722
Total	98,570	97,517
Residential Real Estate \| 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	24,507	27,176
Total Past Due and Nonaccrual	24,507	27,176
Not Past Due or Nonaccrual	0	0
Total	24,507	27,176
Residential Real Estate \| Equity loans
Financing Receivable, Modifications [Line Items]
30-59 Days Past Due	1,837	1,737
60-89 Days Past Due	766	782
90 Days or More Past Due	198	376
Nonaccrual	7,066	9,844
Total Past Due and Nonaccrual	9,867	12,739
Not Past Due or Nonaccrual	33,252	34,213
Total	43,119	46,952
Consumer \| 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 \| Consumer direct
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	37	27
Total Past Due and Nonaccrual	37	27
Not Past Due or Nonaccrual	759	908
Total	796	935
Consumer \| 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	2,597	1,853
Total Past Due and Nonaccrual	2,597	1,853
Not Past Due or Nonaccrual	0	0
Total	$ 2,597	$ 1,853

Loans and Allowance for Loan 50

Loans and Allowance for Loan Losses - Classified as troubled debt restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of contracts, covered \| Contract	0	1	0	3
Post modification outstanding recorded investment, covered \| $	$ 0	$ 8	$ 0	$ 29
Number of subsequent default contracts, covered \| Contract	0	1	0	2
Recorded investment at subsequent default, covered \| $	$ 0	$ 18	$ 0	$ 24
Commercial, Financial and Agricultural
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	4	2	9	5
Post-Modification Outstanding Recorded Investment \| $	$ 31,676	$ 69	$ 32,026	$ 380
Number of subsequent default contracts \| Contract	0	0	0	0
Recorded investment at subsequent default \| $	$ 0	$ 0	$ 0	$ 0
Commercial Real Estate \| Real estate – construction
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	1	0	2	0
Post-Modification Outstanding Recorded Investment \| $	$ 112	$ 0	$ 3,504	$ 0
Number of subsequent default contracts \| Contract	0	0	0	1
Recorded investment at subsequent default \| $	$ 0	$ 0	$ 0	$ 377
Commercial Real Estate \| Commercial real estate – mortgage
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	0	3	5	4
Post-Modification Outstanding Recorded Investment \| $	$ 0	$ 532	$ 1,431	$ 758
Number of subsequent default contracts \| Contract	0	0	0	1
Recorded investment at subsequent default \| $	$ 0	$ 0	$ 0	$ 178
Residential Real Estate \| Residential real estate – mortgage
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	21	14	59	36
Post-Modification Outstanding Recorded Investment \| $	$ 2,868	$ 3,326	$ 10,654	$ 7,571
Number of subsequent default contracts \| Contract	0	1	0	6
Recorded investment at subsequent default \| $	$ 0	$ 119	$ 0	$ 862
Residential Real Estate \| Equity lines of credit
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	30	27	66	86
Post-Modification Outstanding Recorded Investment \| $	$ 1,468	$ 1,488	$ 3,237	$ 4,752
Number of subsequent default contracts \| Contract	8	1	8	1
Recorded investment at subsequent default \| $	$ 204	$ 0	$ 204	$ 0
Residential Real Estate \| Equity loans
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	6	8	15	28
Post-Modification Outstanding Recorded Investment \| $	$ 635	$ 340	$ 1,129	$ 1,836
Number of subsequent default contracts \| Contract	1	1	1	3
Recorded investment at subsequent default \| $	$ 42	$ 55	$ 42	$ 216
Consumer \| 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 \| Consumer direct
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	2	4	3	21
Post-Modification Outstanding Recorded Investment \| $	$ 15	$ 325	$ 24	$ 627
Number of subsequent default contracts \| Contract	0	1	0	1
Recorded investment at subsequent default \| $	$ 0	$ 100	$ 0	$ 100
Consumer \| Consumer indirect
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	56	31	119	53
Post-Modification Outstanding Recorded Investment \| $	$ 917	$ 549	$ 1,999	$ 928
Number of subsequent default contracts \| Contract	1	0	2	1
Recorded investment at subsequent default \| $	$ 13	$ 0	$ 32	$ 18

Loans and Allowance for Loan 51

Loans and Allowance for Loan Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Commitments to lend additional funds to borrowers whose terms have been modified in a TDR	$ 21,900		$ 21,900		$ 5,700
Other real estate owned	21,670		21,670		20,862
Residential real estate loans secured by residential real estate properties for which formal foreclosure proceedings were in process	29,000		29,000		30,000
Interest Rate Concession
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
TDRs	1,200	$ 2,000	4,200	$ 2,900
Modification of Loan Structure
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
TDRs	36,500	$ 4,700	49,800	$ 14,000
Energy Portfolio Segment
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Total energy exposure, including unused commitments to extend credit and letters of credit	8,200,000		8,200,000		9,400,000
Commercial, financial and agricultural	3,300,000		3,300,000		3,800,000
Residential real estate – mortgage
Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items]
Other real estate owned	$ 20,000		$ 20,000		$ 17,000

Loan Sales and Servicing - Narr

Loan Sales and Servicing - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Loans held for sale	$ 101,843	$ 70,582

Loan Sales and Servicing - Loan

Loan Sales and Servicing - Loans Transferred to Held for Sale and Loans Sold (Details) - Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans transferred from held for investment to held for sale	$ 0	$ 907,414	$ 764,022	$ 907,414
Charge-offs on loans recognized at transfer from held for investment to held for sale	0	0	0	0
Loans and loans held for sale sold	$ 121,745	$ 404,674	$ 1,007,096	$ 415,156

Loan Sales and Servicing - Sale

Loan Sales and Servicing - Sales in the Secondary Market (Details) - Originated For Sale In The Secondary Market - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate loans originated for sale in the secondary market sold	[1]	$ 199,073	$ 724,493	$ 482,860	$ 1,309,035
Net gains recognized on sales of residential real estate loans originated for sale in the secondary market	[2]	$ 9,024	$ 11,008	$ 21,705	$ 32,968

[1]	Includes loans originated for sale where the Company retained servicing responsibilities.
[2]	Net gains were recorded in mortgage banking income in the Company's Unaudited Condensed Consolidated Statements of Income.

Loan Sales and Servicing - Real

Loan Sales and Servicing - Real Estate Mortgages Sold With Retained Servicing (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of MSRs		$ 39,027		$ 39,027		$ 44,541
Residential Real Estate Mortgage Loans Sold with Retained Servicing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential mortgage loans sold	[1]	199,073	$ 724,493	798,756	$ 1,308,853
Servicing fees recognized	[2]	6,710	$ 5,802	19,376	$ 15,741
Recorded balance of residential real estate mortgage loans sold with retained servicing	[3]	4,702,178		4,702,178		4,444,602
Fair value of MSRs	[4]	$ 39,027		$ 39,027		$ 44,541

[1]	There is no recourse to the Company for the failures of borrowers to pay loans when due.
[2]	Recorded as a component of other noninterest income in the Company's Unaudited Condensed Consolidated Statements of Income.
[3]	These loans are not included in loans on the Company's Unaudited Condensed Consolidated Balance Sheets.
[4]	Recorded under the fair value method and included in other assets on the Company's Unaudited Condensed Consolidated Balance Sheets.

Loan Sales and Servicing - Resi

Loan Sales and Servicing - Residential MSRs (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance				$ 44,541
Increase (decrease) in fair value:
Ending balance		$ 39,027		39,027
Residential Mortgage
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		36,496	$ 40,871	44,541	$ 35,488
Additions		1,933	6,844	7,583	13,566
Increase (decrease) in fair value:
Due to changes in valuation inputs or assumptions		3,250	(5,485)	(5,391)	(5,631)
Due to other changes in fair value	[1]	(2,652)	(992)	(7,706)	(2,185)
Ending balance		$ 39,027	$ 41,238	$ 39,027	$ 41,238

[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	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Servicing Assets at Fair Value [Line Items]
Fair value of MSRs	$ 39,027	$ 44,541
Composition of residential loans serviced for others, percentage	100.00%	100.00%
Weighted average life (in years)	4 years 4 months 26 days	5 years 4 months 28 days
Prepayment speed:	20.60%	12.40%
Effect on fair value of a 10% increase	$ (1,834)	$ (1,547)
Effect on fair value of a 20% increase	$ (3,512)	$ (2,987)
Weighted average option adjusted spread:	8.10%	9.00%
Effect on fair value of a 10% increase	$ (1,132)	$ (1,504)
Effect on fair value of a 20% increase	$ (2,146)	$ (2,911)
Fixed rate mortgage loan
Servicing Assets at Fair Value [Line Items]
Composition of residential loans serviced for others, percentage	97.20%	96.80%
Adjustable rate mortgage loan
Servicing Assets at Fair Value [Line Items]
Composition of residential loans serviced for others, percentage	2.80%	3.20%

Derivatives and Hedging - Deriv

Derivatives and Hedging - Derivatives by Balance Sheet Location (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative assets		$ 285,731	$ 191,061
Derivative liabilities		476,133	269,295
Derivatives designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	100,533	61,549
Derivative liabilities	[2]	12,235	21,085
Derivatives designated as hedging instrument \| Fair value hedges
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	95,671	59,975
Derivative liabilities	[2]		9,405
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	2,123,950
Derivative assets	[1]	95,671	59,975
Derivative liabilities	[2]		9,405
Derivatives designated as hedging instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	4,862	1,574
Derivative liabilities	[2]	12,235	11,680
Derivatives designated as hedging instrument \| Cash flow hedges \| Interest rate swap commercial loan
Derivatives, Fair Value [Line Items]
Derivative, notional amount		1,725,000	1,900,000
Derivative assets	[1]	4,862	1,574
Derivative liabilities	[2]		782
Derivatives designated as hedging instrument \| Cash flow hedges \| Interest rate swap FHLB advances
Derivatives, Fair Value [Line Items]
Derivative, notional amount		120,000	320,000
Derivative liabilities	[2]	11,846	10,858
Derivatives designated as hedging instrument \| Cash flow hedges \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount		5,593	8,318
Derivative liabilities	[2]	389	40
Free-standing derivatives not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	600,220	394,554
Derivative liabilities	[2]	533,502	320,902
Free-standing derivatives not designated as hedging instrument \| Forward contracts related to residential mortgage loans held for sale
Derivatives, Fair Value [Line Items]
Derivative, notional amount		225,000	216,500
Derivative assets	[1]	107	502
Derivative liabilities	[2]	1,005	217
Free-standing derivatives not designated as hedging instrument \| Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative, notional amount		220,963	175,002
Derivative assets	[1]	4,532	2,880
Derivative liabilities	[2]	3	6
Free-standing derivatives not designated as hedging instrument \| Purchased equity option related to equity-linked CDs
Derivatives, Fair Value [Line Items]
Derivative, notional amount		839,895	876,649
Derivative assets	[1]	61,157	59,375
Free-standing derivatives not designated as hedging instrument \| Written equity option related to equity-linked CDs
Derivatives, Fair Value [Line Items]
Derivative, notional amount		783,256	831,480
Derivative liabilities	[2]	57,230	56,559
Free-standing derivatives not designated as hedging instrument \| Forward and swap contracts related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		393,264	479,072
Derivative assets	[1]	849	3,821
Derivative liabilities	[2]	1,601	752
Free-standing derivatives not designated as hedging instrument \| Spot contracts related to commercial loans
Derivatives, Fair Value [Line Items]
Derivative, notional amount		42,694	54,511
Derivative assets	[1]	49	6
Derivative liabilities	[2]	0	372
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		72,405	67,896
Derivative liabilities	[2]	1,810	1,697
Free-standing derivatives not designated as hedging instrument \| Futures contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount	[3]	210,000	390,000
Free-standing derivatives not designated as hedging instrument \| Interest rate contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		28,597,938	23,370,927
Derivative assets	[1]	518,406	303,944
Derivative liabilities	[2]	458,763	238,611
Free-standing derivatives not designated as hedging instrument \| Commodity contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		21,692	114,336
Derivative assets	[1]	2,093	14,127
Derivative liabilities	[2]	2,093	14,110
Free-standing derivatives not designated as hedging instrument \| Foreign exchange contracts for customers
Derivatives, Fair Value [Line Items]
Derivative, notional amount		900,644	425,946
Derivative assets	[1]	13,027	9,899
Derivative liabilities	[2]	10,997	8,578
Free-standing derivatives not designated as hedging instrument \| Total trading account assets and liabilities
Derivatives, Fair Value [Line Items]
Derivative assets	[1]	533,526	327,970
Derivative liabilities	[2]	$ 471,853	$ 261,299

[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) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) related to hedge, firm commitments no longer qualifying as a fair value hedge	$ 0	$ 0	$ 0	$ 0
Derivatives designated as hedging instrument \| Fair value hedges \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedges weighted average expected remaining term			4 years 3 months 40 days
Derivatives designated as hedging instrument \| Fair value hedges \| Interest Rate Swap \| Interest on FHLB and other borrowings
Change in fair value of interest rate contracts:
Change in fair value of interest rate contract - interest rate swaps hedging long term debt	(20,209,000)	40,416,000	$ 45,101,000	10,383,000
Change in fair value of interest rate contract - hedged long term debt	19,246,000	(38,634,000)	(39,978,000)	(12,511,000)
Other gains on interest rate contracts:
Interest and amortization related to interest rate swaps on hedged long term debt	$ 10,489,000	$ 12,413,000	$ 31,834,000	$ 34,157,000

Derivatives and Hedging - Cash

Derivatives and Hedging - Cash Flow Hedges (Details) - Derivatives designated as hedging instrument - Cash flow hedges - Interest Rate Swap - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges not terminated, net fair value	$ (7,400,000)		$ (7,400,000)
Fair value hedges weighted average expected remaining term			1 year 22 days
Maximum length of time hedged in interest rate cash flow hedge			4 years 8 months 56 days
Interest rate and foreign currency exchange contracts:
Net change in amount recognized in other comprehensive income	(1,461,000)	$ 2,042,000	$ 1,728,000	$ 5,322,000
Amount reclassified from accumulated other comprehensive income (loss) into net income	702,000	1,924,000	1,678,000	4,778,000
Amount of ineffectiveness recognized in net income	0	0	0	0
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months			(1,200,000)
Interest rate and foreign currency exchange contracts:
Amount of ineffectiveness recognized in net income	$ 0	$ 0	$ 0	$ 0

Derivatives and Hedging - Free

Derivatives and Hedging - Free Standing Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Futures contracts \| Mortgage banking income and corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 86	$ (248)	$ (229)	$ (199)
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	0	(264)	(195)
Forward 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	1,094	(2,317)	(2,027)	1,679
Interest rate lock commitments \| Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(162)	308	1,655	1,447
Interest rate contracts for customers \| Corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	5,371	4,961	14,780	21,490
Commodity contracts for customers \| Corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(1)	(2)	(6)	7
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	(3,716)	(13,960)	1,782	(27,995)
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	3,625	13,652	(672)	27,712
Forward and swap contracts related to commercial loans \| Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(1,517)	17,181	(5,173)	40,265
Spot contracts related to commercial loans \| Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	1,471	(4,143)	91	(7,663)
Foreign currency exchange contracts for customers \| Corporate and correspondent investment sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 1,305	$ 590	$ 2,954	$ 1,451

Derivatives and Hedging - Credi

Derivatives and Hedging - Credit and Market Risks (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivatives [Line Items]
Derivative, collateral, right to reclaim cash	[1]	$ 295,448,000		$ 295,448,000		$ 159,594,000
Derivative, collateral, obligation to return	[1]	35,882,000		35,882,000		33,517,000
Other Assets
Derivatives [Line Items]
Derivative, collateral, right to reclaim cash		295,000,000		295,000,000		162,000,000
Deposits
Derivatives [Line Items]
Derivative, collateral, obligation to return		39,000,000		39,000,000		$ 40,000,000
Free-standing derivatives not designated as hedging instrument \| Interest Rate Swap
Derivatives [Line Items]
Credit risk derivatives, at fair value, net		534,000,000		534,000,000
Gain (loss) on derivative instruments held for trading purposes, net		(2,600,000)	$ (15,000)	(2,500,000)	$ (9,000)
Gain (loss) on derivative instruments held for non-trading purposes, net		0	$ 0	0	$ 0
Derivatives designated as hedging instrument \| Interest Rate Swap \| Over the Counter
Derivatives [Line Items]
Credit risk derivatives, at fair value, net		$ 101,000,000		$ 101,000,000

[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.

Derivatives and Hedging - Conti

Derivatives and Hedging - Contingent Features (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, net liability position, aggregate fair value	$ 61	$ 46
Collateral already posted, aggregate fair value	60	45
Additional collateral, aggregate fair value	$ 1	$ 1

Derivatives and Hedging - Netti

Derivatives and Hedging - Netting Arrangements (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Derivative financial assets:
Derivative assets, total derivatives subject to a master netting arrangement, gross amounts recognized		$ 285,731	$ 191,061
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		285,731	191,061
Derivative assets, total derivatives subject to a master netting arrangement, financial instruments collateral received/pledged	[1]	109	0
Derivate assets, total derivatives subject to a master netting arrangement, cash collateral received/pledged	[1]	35,882	33,517
Derivative asset, total derivatives subject to a master netting arrangement, net amount		249,740	157,544
Derivative assets, total derivatives not subject to a master netting arrangement		415,022	265,042
Derivative assets, total derivatives not subject to a master netting arrangement, net amount		415,022	265,042
Total derivative financial assets, gross amounts recognized		700,753	456,103
Total derivative financial assets, net amount presented in the condensed consolidated balance sheet		700,753	456,103
Total derivative financial assets, net amount		664,762	422,586
Derivative financial liabilities:
Derivative liabilities, total derivative subject to a master netting arrangement, gross amounts recognized		476,133	269,295
Derivative liabilities, total derivative subject to a master netting arrangement, gross amount offset in the condensed consolidated balance sheets		0	0
Derivative liabilities, total derivative subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		476,133	269,295
Derivative liabilities, total derivatives subject to a master netting arrangement, financial instruments collateral received/pledged	[1]	24,862	23,856
Derivative liabilities, total derivative subject to a master netting arrangement, cash collateral received/pledged	[1]	295,448	159,594
Derivate liabilities, total derivatives subject to master netting arrangement, net amount		155,823	85,845
Derivative liabilities, total derivatives not subject to a master netting arrangement		69,604	72,692
Derivative liabilities, total derivatives not subject to a master netting arrangement, net amount		69,604	72,692
Derivative liabilities, total derivative financial liabilities, gross amount recognized		545,737	341,987
Total derivative financial liabilities, net amount presented in the condensed consolidated balance sheets		545,737	341,987
Total derivative financial liabilities, net amount		$ 225,427	$ 158,537

[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 Activiti65

Securities Financing Activities (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Fair value of collateral received related to securities purchased under agreements to resell		$ 4,000,000	$ 5,200,000
Fair value of collateral pledged related to securities sold under agreements to repurchase		3,400,000	4,900,000
Securities purchased under agreements to resell
Securities purchased under agreements to resell, subject to master netting arrangement, gross amounts recognized		4,113,664	5,282,661
Securities purchased under agreements to resell, subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheets		3,795,800	5,003,555
Securities purchased under agreements to resell, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets		317,864	279,106
Securities purchased under agreements to resell, subject to a master netting arrangement, financial instruments collateral received/ pledged	[1]	317,864	279,106
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		3,881,978	5,080,164
Securities sold under agreements to repurchase, gross amounts offset in the condensed consolidated balance sheets		3,795,800	5,003,555
Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheet		86,178	76,609
Securities sold under agreements to repurchase, subject to a master netting arrangement, financial instruments collateral received/ pledged	[1]	86,178	76,609
Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount		$ 0	$ 0

[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 Activiti66

Securities Financing Activities - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	$ 3,881,978	$ 5,080,164
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	1,557,005	3,214,085
Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	602,850	232,924
30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	1,722,123	1,633,155
Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0	0
U.S. Treasury and other U.S. government agencies
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	3,792,368	3,965,632
U.S. Treasury and other U.S. government agencies \| Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	1,557,005	3,214,085
U.S. Treasury and other U.S. government agencies \| Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	602,850	232,924
U.S. Treasury and other U.S. government agencies \| 30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	1,632,513	518,623
U.S. Treasury and other U.S. government agencies \| Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0	0
Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	89,610	976,449
Mortgage-backed securities \| Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0	0
Mortgage-backed securities \| Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	0	0
Mortgage-backed securities \| 30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	89,610	976,449
Mortgage-backed securities \| Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase	$ 0	0
Collateralized mortgage obligations
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase		138,083
Collateralized mortgage obligations \| Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase		0
Collateralized mortgage obligations \| Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase		0
Collateralized mortgage obligations \| 30 - 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase		138,083
Collateralized mortgage obligations \| Greater Than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements repurchase		$ 0

Commitments, Contingencies an67

Commitments, Contingencies and Guarantees - Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Guarantor Obligations [Line Items]
Commitments to extend credit	$ 26,736,536	$ 27,853,409
Financial Standby Letter of Credit
Guarantor Obligations [Line Items]
Standby and commercial letters of credit	$ 1,406,754	$ 1,709,145

Commitments, Contingencies an68

Commitments, Contingencies and Guarantees - Narrative (Details)	1 Months Ended			9 Months Ended
	Jan. 31, 2016security_offering	Jun. 30, 2013patent	May 31, 2013USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual				$ 30,000,000
Financial Standby Letter of Credit
Loss Contingencies [Line Items]
Letters of credit, deferred fees				6,900,000	$ 6,000,000
Maximum potential amount of future undiscounted payments Company could be required to make on outstanding standby letters of credit				$ 1,400,000,000
Financial Standby Letter of Credit \| Minimum
Loss Contingencies [Line Items]
Standby and commercial letters of credit expiration term				1 year
Financial Standby Letter of Credit \| Maximum
Loss Contingencies [Line Items]
Standby and commercial letters of credit expiration term				4 years
Potential Recourse Related To FNMA Securitizations \| Maximum
Loss Contingencies [Line Items]
Loss sharing agreement, amount owed to FDIC				$ 19,000,000	19,000,000
FDIC Loss Sharing Agreement
Loss Contingencies [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				$ 147,000,000	145,000,000
FDIC Loss Sharing Agreement \| Commercial Loan
Loss Contingencies [Line Items]
FDIC loss sharing agreement, term				5 years
FDIC Loss Sharing Agreement \| Single Family Residential Loan
Loss Contingencies [Line Items]
FDIC loss sharing agreement, term				10 years
Accrued Expenses and Other Liabilities
Loss Contingencies [Line Items]
FDIC indemnification expense				$ 136,000,000	131,000,000
Accrued Expenses and Other Liabilities \| Financial Standby Letter of Credit
Loss Contingencies [Line Items]
Loss Contingency Accrual				101,000,000	85,000,000
Accrued Expenses and Other Liabilities \| Potential Recourse Related To FNMA Securitizations
Loss Contingencies [Line Items]
Loss Contingency Accrual				680,000	869,000
Accrued Expenses and Other Liabilities \| Standard Representations And Warranties Related To Loan Sales To Government-Sponsored Agencies [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual				$ 1,000,000	$ 2,000,000
Pending Litigation \| Morris Cerullo World Evangelism v. BBVA Compass and Jack Wilkinson
Loss Contingencies [Line Items]
Damages sought			$ 5,200,000
Pending Litigation \| Morris Cerullo World Evangelism v. BBVA Compass and Jack Wilkinson \| Financial Standby Letter of Credit
Loss Contingencies [Line Items]
Line of credit			$ 5,200,000
Pending Litigation \| Intellectual Ventures II, LLC vs BBVA Compass Bancshares, Inc
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed \| patent		5
Pending Litigation \| In re Plains All American Pipeline, L.P. Securities Litigation \| BSI
Loss Contingencies [Line Items]
Loss contingency, number of security offers challenged \| security_offering	8

Fair Value of Financial Instr69

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]
Federal home loan bank and federal reserve stock required to be owned by company	$ 427,000		$ 427,000		$ 503,000
Forward contracts
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) realized due to changes in fair value of loans	1,100	$ (2,300)	(2,000)	$ 1,700
Noninterest income \| Residential mortgage loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) realized due to changes in fair value of loans	$ (478)	$ 1,400	$ 2,100	$ (651)

Fair Value of Financial Instr70

Fair Value of Financial Instruments - Unpaid Principle Balances (Details) - Residential mortgage loans held for sale - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 101,843	$ 70,582
Aggregate Unpaid Principal Balance	97,712	68,553
Difference	$ 4,131	$ 2,029

Fair Value of Financial Instr71

Fair Value of Financial Instruments - Fair value of balance sheet items (Details) - USD ($) $ in Thousands	Sep. 30, 2016		Dec. 31, 2015
Assets:
Trading account assets	$ 4,051,461		$ 4,138,132
Investment securities available for sale	11,516,885		11,050,520
Derivative asset	700,753		456,103
Other assets	1,585,863		1,310,091
Liabilities:
Derivative liabilities	545,737		341,987
U.S. Treasury and other U.S. government agencies
Assets:
Investment securities available for sale	1,850,230		3,211,492
Collateralized mortgage obligations
Assets:
Investment securities available for sale	5,207,217		2,705,256
State and political subdivisions
Assets:
Investment securities available for sale	10,075		15,887
Other debt securities
Assets:
Investment securities available for sale	16,852		24,045
Equity Securities
Assets:
Investment securities available for sale	426,874		503,578
Fair Value, measurements, recurring
Assets:
Trading account assets	4,051,461		4,138,132
Investment securities available for sale	11,090,355		10,547,236
Loans held for sale, estimated fair value	101,843		70,582
Derivative asset	167,227		128,133
Other assets	39,027		44,541
Liabilities:
Trading account liabilities	4,013,076		4,143,943
Derivative liabilities	72,074		78,991
Fair Value, measurements, recurring \| Interest rate contracts
Assets:
Derivative asset	105,172		64,931
Liabilities:
Derivative liabilities	12,854		21,268
Fair Value, measurements, recurring \| Equity contracts
Assets:
Derivative asset	61,157		59,375
Liabilities:
Derivative liabilities	57,230		56,559
Fair Value, measurements, recurring \| Foreign exchange contracts
Assets:
Derivative asset	898		3,827
Liabilities:
Derivative liabilities	1,990		1,164
Fair Value, measurements, recurring \| U.S. Treasury and other U.S. government agencies
Assets:
Trading account assets	3,512,398		3,805,269
Investment securities available for sale	1,850,230		3,211,492
Liabilities:
Trading account liabilities	3,540,472		3,881,925
Fair Value, measurements, recurring \| Collateralized mortgage obligations
Assets:
Trading account assets	518
Investment securities available for sale	5,207,217		2,705,256
Fair Value, measurements, recurring \| State and political subdivisions
Assets:
Trading account assets	1,183		1,275
Investment securities available for sale	10,075		15,887
Fair Value, measurements, recurring \| Other debt securities
Assets:
Trading account assets	2,852		2,501
Investment securities available for sale	16,852		24,045
Liabilities:
Trading account liabilities	751		719
Fair Value, measurements, recurring \| Interest rate contracts
Assets:
Trading account assets	518,406		303,944
Liabilities:
Trading account liabilities	458,763		238,611
Fair Value, measurements, recurring \| Commodity contracts
Assets:
Trading account assets	2,093		14,127
Liabilities:
Trading account liabilities	2,093		14,110
Fair Value, measurements, recurring \| Foreign exchange contracts
Assets:
Trading account assets	13,027		9,899
Liabilities:
Trading account liabilities	10,997		8,578
Fair Value, measurements, recurring \| Other trading assets
Assets:
Trading account assets	984		1,117
Fair Value, measurements, recurring \| Mortgage-backed securities
Assets:
Investment securities available for sale	4,005,637		4,590,262
Fair Value, measurements, recurring \| Equity Securities
Assets:
Investment securities available for sale	344	[1]	294	[2]
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1
Assets:
Trading account assets	3,512,398		3,805,269
Investment securities available for sale	734,230		2,006,494
Liabilities:
Trading account liabilities	3,540,472		3,881,925
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1 \| U.S. Treasury and other U.S. government agencies
Assets:
Trading account assets	3,512,398		3,805,269
Investment securities available for sale	717,327		1,982,408
Liabilities:
Trading account liabilities	3,540,472		3,881,925
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1 \| Other debt securities
Assets:
Investment securities available for sale	16,852		24,045
Fair Value, measurements, recurring \| Quoted Prices in Active Markets for Identical Assets, Level 1 \| Equity Securities
Assets:
Investment securities available for sale	51	[1]	41	[2]
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2
Assets:
Trading account assets	538,079		331,746
Investment securities available for sale	10,355,832		8,540,489
Loans held for sale, estimated fair value	101,843		70,582
Derivative asset	162,695		125,253
Liabilities:
Trading account liabilities	472,604		262,018
Derivative liabilities	72,071		78,985
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Interest rate contracts
Assets:
Derivative asset	100,640		62,051
Liabilities:
Derivative liabilities	12,851		21,262
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Equity contracts
Assets:
Derivative asset	61,157		59,375
Liabilities:
Derivative liabilities	57,230		56,559
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Foreign exchange contracts
Assets:
Derivative asset	898		3,827
Liabilities:
Derivative liabilities	1,990		1,164
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| U.S. Treasury and other U.S. government agencies
Assets:
Investment securities available for sale	1,132,903		1,229,084
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Collateralized mortgage obligations
Assets:
Trading account assets	518
Investment securities available for sale	5,207,217		2,705,256
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| State and political subdivisions
Assets:
Trading account assets	1,183		1,275
Investment securities available for sale	10,075		15,887
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Other debt securities
Assets:
Trading account assets	2,852		2,501
Liabilities:
Trading account liabilities	751		719
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Interest rate contracts
Assets:
Trading account assets	518,406		303,944
Liabilities:
Trading account liabilities	458,763		238,611
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Commodity contracts
Assets:
Trading account assets	2,093		14,127
Liabilities:
Trading account liabilities	2,093		14,110
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Foreign exchange contracts
Assets:
Trading account assets	13,027		9,899
Liabilities:
Trading account liabilities	10,997		8,578
Fair Value, measurements, recurring \| Significant Other Observable Inputs, Level 2 \| Mortgage-backed securities
Assets:
Investment securities available for sale	4,005,637		4,590,262
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3
Assets:
Trading account assets	984		1,117
Investment securities available for sale	293		253
Derivative asset	4,532		2,880
Other assets	39,027		44,541
Liabilities:
Derivative liabilities	3		6
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3 \| Interest rate contracts
Assets:
Derivative asset	4,532		2,880
Liabilities:
Derivative liabilities	3		6
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3 \| Other trading assets
Assets:
Trading account assets	984		1,117
Fair Value, measurements, recurring \| Fair Value, Inputs, Level 3 \| Equity Securities
Assets:
Investment securities available for sale	$ 293	[1]	$ 253	[2]

[1]	Excludes $427 million of FHLB and Federal Reserve stock required to be owned by the Company at September 30, 2016. These securities are carried at par.
[2]	Excludes $503 million of FHLB and Federal Reserve stock required to be owned by the Company at December 31, 2015. These securities are carried at par.

Fair Value of Financial Instr72

Fair Value of Financial Instruments - Assets measured on a recurring basis (Details) - Fair Value, measurements, recurring - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Trading Assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		$ 1,031	$ 1,400	$ 1,117	$ 1,590
Total gains or losses (realized/unrealized):
Included in earnings	[1]	(47)	(147)	(133)	(337)
Purchases, issuances, sales and settlements:
Balance, end of year		984	1,253	984	1,253
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		(47)	(147)	(133)	(337)
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		294	251	253	4
Purchases, issuances, sales and settlements:
Purchases				41	247
Sales		(1)	(1)	(1)	(1)
Balance, end of year		293	250	293	250
Interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		4,691	3,457	2,874	2,318
Total gains or losses (realized/unrealized):
Included in earnings	[1]	(162)	308	1,655	1,447
Purchases, issuances, sales and settlements:
Balance, end of year		4,529	3,765	4,529	3,765
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		(162)	308	1,655	1,447
Other Assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year		36,496	40,871	44,541	35,488
Total gains or losses (realized/unrealized):
Included in earnings	[1]	598	(6,477)	(13,097)	(7,816)
Purchases, issuances, sales and settlements:
Issuances		1,933	6,844	7,583	13,566
Balance, end of year		39,027	41,238	39,027	41,238
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held		$ 598	$ (6,477)	$ (13,097)	$ (7,816)

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

Fair Value of Financial Instr73

Fair Value of Financial Instruments - Assets measured on nonrecurring basis (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity, estimated fair value		$ 1,241,234		$ 1,241,234		$ 1,244,121
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		1,241,234		1,241,234		$ 1,244,121
Fair Value, measurements, nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities held to maturity, estimated fair value		2,595	$ 15,423	2,595	$ 15,423
Investment securities held to maturity recorded as other than temporary impairment losses		0	0	(130)	(1,298)
Impaired loans, fair value	[1]	71,806	169,458	71,806	169,458
Impaired loans, total gains (losses)	[1]	(9,202)	(6,836)	(55,922)	(11,689)
OREO, fair value		21,670	23,762	21,670	23,762
OREO, total gains (losses)		(458)	(1,135)	(2,777)	(3,317)
Fair Value, measurements, nonrecurring \| 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		2,595	15,423	2,595	15,423
Impaired loans, fair value	[1]	71,806	169,458	71,806	169,458
OREO, fair value		$ 21,670	$ 23,762	$ 21,670	$ 23,762

[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 Instr74

Fair Value of Financial Instruments - Quantitative information about unobservable inputs for material assets and liabilities measured using fair value (Details) - USD ($)		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment securities held to maturity, estimated fair value		$ 1,241,234,000	$ 1,244,121,000
Fair Value, measurements, nonrecurring
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment securities held to maturity, estimated fair value		2,595,000		$ 15,423,000
Impaired loans, fair value	[1]	71,806,000		169,458,000
OREO, fair value		21,670,000		23,762,000
Fair Value, Inputs, Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment securities held to maturity, estimated fair value		1,241,234,000	$ 1,244,121,000
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Other Trading Assets
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Other trading asset, fair value		984,000
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Interest rate contracts
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Interest rate contracts, fair value		4,529,000
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Other Assets
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Other assets -MSRs, fair value		$ 39,027,000
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Minimum \| Other Trading Assets \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		6.30%
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		3.70%
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		1.80%
Cost to service		$ 65
Discount rate		6.10%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Maximum \| Other Trading Assets \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Prepayment rate		11.90%
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		99.40%
Cap grid rate		2.00%
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		71.60%
Cost to service		$ 4,000
Discount rate		18.60%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, recurring \| Average \| Other Trading Assets \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Default rate		9.30%
Prepayment rate		8.50%
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		62.00%
Cap grid rate		0.90%
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		20.60%
Cost to service		$ 88
Discount rate		8.10%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Investment securities held to maturity, estimated fair value		$ 2,595,000		15,423,000
Impaired loans, fair value	[1]	71,806,000		169,458,000
OREO, fair value		$ 21,670,000		$ 23,762,000
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		80.00%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Average \| Investment securities held to maturity \| Discounted cash flow
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Default rate		9.20%
Loss severity rate		63.70%
Prepayment rate		10.90%
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		27.90%
Fair Value, Inputs, Level 3 \| Fair Value, measurements, nonrecurring \| Average \| OREO \| Appraised value
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Appraised value rate	[2]	8.00%

[1]	Total gains (losses) represent charge-offs on impaired loans for which adjustments are based on the appraised value of the collateral.
[2]	Represents discount to appraised value for estimated costs to sell.

Fair Value of Financial Instr75

Fair Value of Financial Instruments - Carrying value and estimated fair value (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Assets:
Cash and cash equivalents	$ 4,426,691	$ 4,496,828	$ 4,428,256	$ 3,432,948
Investment securities held to maturity	1,240,850	1,322,676
Investment securities held to maturity, estimated fair value	1,241,234	1,244,121
Liabilities:
Deposits	67,587,337	65,981,766
Federal funds purchased and securities sold under agreements to repurchase	165,573	750,154
Other short-term borrowings	3,591,223	4,032,644
Fair Value, Inputs, Level 1
Assets:
Cash and cash equivalents, estimated fair value	4,426,691	4,496,828
Fair Value, Inputs, Level 2
Liabilities:
Deposits, estimated fair value	67,754,047	66,090,901
FHLB and other borrowings, estimated fair value	3,637,982	5,405,386
Federal funds purchased and securities sold under agreements to repurchase, estimated fair value	165,573	750,154
Other short-term borrowings, estimated fair value	50,000	150,000
Fair Value, Inputs, Level 3
Assets:
Investment securities held to maturity, estimated fair value	1,241,234	1,244,121
Loans, net, estimated fair value	55,897,095	57,916,215
Reported value measurement
Assets:
Cash and cash equivalents	4,426,691	4,496,828
Investment securities held to maturity	1,240,850	1,322,676
Loans, net	59,349,203	60,561,411
Liabilities:
Deposits	67,587,337	65,981,766
FHLB and other borrowings	3,671,861	5,438,620
Federal funds purchased and securities sold under agreements to repurchase	165,573	750,154
Other short-term borrowings	50,000	150,000
Estimate of fair value measurement
Assets:
Cash and cash equivalents, estimated fair value	4,426,691	4,496,828
Investment securities held to maturity, estimated fair value	1,241,234	1,244,121
Loans, net, estimated fair value	55,897,095	57,916,215
Liabilities:
Deposits, estimated fair value	67,754,047	66,090,901
FHLB and other borrowings, estimated fair value	3,637,982	5,405,386
Federal funds purchased and securities sold under agreements to repurchase, estimated fair value	165,573	750,154
Other short-term borrowings, estimated fair value	$ 50,000	$ 150,000

Comprehensive Income (Details)

Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Comprehensive Income (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss), Pretax [Abstract]
Other comprehensive income (loss)	$ (41,254)	$ 47,807	$ 82,989	$ 24,114
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Other comprehensive income (loss)	(15,110)	20,720	30,297	10,134
Other Comprehensive Income (Loss), After-Tax [Abstract]
Change in unamortized net holding losses on investment securities held to maturity	1,168	1,066	2,924	4,834
Less: non-credit related impairment on investment securities held to maturity	0	0	96	49
Change in unamortized non-credit related impairment on investment securities held to maturity	225	290	648	704
Net change in unamortized holding losses on securities held to maturity	1,393	1,356	3,476	5,489
Other comprehensive (loss) income, net of tax	(26,144)	27,087	52,692	13,980
Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale			65,592	39,270
Less: reclassification adjustment for net gains on sale of securities in net income			16,111	32,982
Other comprehensive (loss) income, net of tax			49,481	6,288
Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Other Comprehensive Income (Loss), Pretax [Abstract]
Other comprehensive income (loss)	(2,303)	3,456	2,734	9,105
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Other comprehensive income (loss)	(842)	1,414	1,006	3,783
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale			2,787	8,019
Less: reclassification adjustment for net gains on sale of securities in net income			1,059	2,697
Other comprehensive (loss) income, net of tax	(1,461)	2,042	1,728	5,322
Defined Benefit Plan Adjustment
Other Comprehensive Income (Loss), Pretax [Abstract]
Other comprehensive income (loss)	0	0	1,300	2,716
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Other comprehensive income (loss)	0	0	369	1,001
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale			0	0
Less: reclassification adjustment for net gains on sale of securities in net income			(931)	(1,715)
Other comprehensive (loss) income, net of tax	0	0	931	1,715
Available-for-sale Securities \| Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity
Other Comprehensive Income (Loss), Pretax [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale	(41,149)	48,686	103,507	69,541
Less: reclassification adjustment for net gains on sale of securities in net income	0	6,736	30,037	66,967
Other comprehensive income (loss)	(41,149)	41,950	73,470	2,574
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale	(15,073)	21,193	37,915	30,271
Less: reclassification adjustment for net gains on sale of securities in net income	0	2,932	11,002	29,151
Other comprehensive income (loss)	(15,073)	18,261	26,913	1,120
Other Comprehensive Income (Loss), After-Tax [Abstract]
Unrealized holding gains (losses) arising during period from securities available for sale	(26,076)	27,493	65,592	39,270
Less: reclassification adjustment for net gains on sale of securities in net income	0	3,804	19,035	37,816
Other comprehensive (loss) income, net of tax	(26,076)	23,689	46,557	1,454
Held-to-maturity Securities \| Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity
Other Comprehensive Income (Loss), Pretax [Abstract]
Change in unamortized net holding losses on investment securities held to maturity	1,844	1,886	4,615	8,559
Less: non-credit related impairment on investment securities held to maturity	0	0	151	87
Change in unamortized non-credit related impairment on investment securities held to maturity	354	515	1,021	1,247
Net change in unamortized holding losses on securities held to maturity	2,198	2,401	5,485	9,719
Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract]
Change in unamortized net holding losses on investment securities held to maturity	676	820	1,691	3,725
Less: non-credit related impairment on investment securities held to maturity	0	0	55	38
Change in unamortized non-credit related impairment on investment securities held to maturity	129	225	373	543
Net change in unamortized holding losses on securities held to maturity	805	1,045	2,009	4,230
Other Comprehensive Income (Loss), After-Tax [Abstract]
Change in unamortized net holding losses on investment securities held to maturity	1,168	1,066	2,924	4,834
Less: non-credit related impairment on investment securities held to maturity	0	0	96	49
Change in unamortized non-credit related impairment on investment securities held to maturity	225	290	648	704
Net change in unamortized holding losses on securities held to maturity	$ 1,393	$ 1,356	$ 3,476	$ 5,489

Comprehensive Income - AOCI (De

Comprehensive Income - AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period			$ 12,624,709	$ 12,054,922
Other comprehensive (loss) income, net of tax	$ (26,144)	$ 27,087	52,692	13,980
Balance, end of period	12,819,190	12,443,728	12,819,190	12,443,728
Unrealized Gains (Losses) on Securities Available for Sale and Transferred to Held to Maturity
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period			(56,326)	4,469
Other comprehensive income (loss) before reclassifications			65,592	39,270
Amounts reclassified from accumulated other comprehensive income (loss)			(16,111)	(32,982)
Other comprehensive (loss) income, net of tax			49,481	6,288
Balance, end of period	(6,845)	10,757	(6,845)	10,757
Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period			(6,407)	(7,694)
Other comprehensive income (loss) before reclassifications			2,787	8,019
Amounts reclassified from accumulated other comprehensive income (loss)			(1,059)	(2,697)
Other comprehensive (loss) income, net of tax	(1,461)	2,042	1,728	5,322
Balance, end of period	(4,679)	(2,372)	(4,679)	(2,372)
Defined Benefit Plan Adjustment
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period			(29,166)	(41,121)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			931	1,715
Other comprehensive (loss) income, net of tax	0	0	931	1,715
Balance, end of period	(28,235)	(39,406)	(28,235)	(39,406)
Unamortized Impairment Losses on Investment Securities Held to Maturity
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period			(7,437)	(7,516)
Other comprehensive income (loss) before reclassifications			(96)	(49)
Amounts reclassified from accumulated other comprehensive income (loss)			648	704
Other comprehensive (loss) income, net of tax			552	655
Balance, end of period	(6,885)	(6,861)	(6,885)	(6,861)
Accumulated Other Comprehensive Loss
Accumulated Comprehensive Income [Roll Forward]
Balance, beginning of period			(99,336)	(51,862)
Other comprehensive income (loss) before reclassifications			68,283	47,240
Amounts reclassified from accumulated other comprehensive income (loss)			(15,591)	(33,260)
Other comprehensive (loss) income, net of tax			52,692	13,980
Balance, end of period	$ (46,644)	$ (37,882)	$ (46,644)	$ (37,882)

Comprehensive Income - Reclassi

Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest on investment securities held to maturity		$ 6,675	$ 6,953	$ 20,229	$ 20,579
Interest and fees on loans		557,996	540,517	1,678,249	1,615,753
Interest and fees on FHLB advances		(21,315)	(20,422)	(58,919)	(67,068)
Net income before income tax expense		157,196	182,068	376,668	572,575
Income tax (expense) benefit		(36,845)	(52,428)	(94,548)	(156,865)
Net income		120,351	129,640	282,120	415,710
Reclassification out of Accumulated Other Comprehensive Income (Loss) \| Unrealized Gains (Losses) 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]	0	6,736	30,037	66,967
Interest on investment securities held to maturity	[1]	(1,844)	(1,886)	(4,615)	(8,559)
Net income before income tax expense	[1]	(1,844)	4,850	25,422	58,408
Income tax (expense) benefit	[1]	676	(2,112)	(9,311)	(25,426)
Net income	[1]	(1,168)	2,738	16,111	32,982
Reclassification out of Accumulated Other Comprehensive Income (Loss) \| Accumulated Gains (Losses) on Cash Flow Hedging Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and fees on loans	[1]	1,654	3,646	5,587	9,985
Interest and fees on FHLB advances	[1]	(952)	(1,722)	(3,909)	(5,207)
Net income before income tax expense	[1]	702	1,924	1,678	4,778
Income tax (expense) benefit	[1]	(260)	(839)	(619)	(2,081)
Net income	[1]	442	1,085	1,059	2,697
Reclassification out of Accumulated Other Comprehensive Income (Loss) \| Defined Benefit Plan Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic expense	[1],[2]	0	0	(1,300)	(2,716)
Income tax (expense) benefit	[1]	0	0	369	1,001
Net income	[1]	0	0	(931)	(1,715)
Reclassification out of Accumulated Other Comprehensive Income (Loss) \| 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]	(354)	(515)	(1,021)	(1,247)
Income tax (expense) benefit	[1]	129	225	373	543
Net income	[1]	$ (225)	$ (290)	$ (648)	$ (704)

[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 19, Benefit Plans, in the Notes to the December 31, 2015, Consolidated Financial Statements for additional details).

Supplemental Disclosure for S79

Supplemental Disclosure for Statement of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Supplemental disclosures of cash flow information:
Interest paid	$ 339,345	$ 277,140
Net income taxes paid	94,808	145,056
Supplemental schedule of noncash investing and financing activities:
Transfer of loans and loans held for sale to OREO	21,547	16,552
Transfer of loans to loans held for sale	764,022	906,857
Change in unrealized gains (losses) on available for sale securities	73,470	2,574
Issuance of restricted stock, net of cancellations	$ 1,083	$ 458

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 514,809	$ 507,874	$ 1,535,929	$ 1,508,888
Provision (credit) for loan losses	65,107	29,151	265,025	117,331
Noninterest income	263,765	260,720	795,216	817,176
Noninterest expense	556,271	557,375	1,689,452	1,636,158
Net income before income tax expense	157,196	182,068	376,668	572,575
Income tax expense (benefit)	36,845	52,428	94,548	156,865
Net income	120,351	129,640	282,120	415,710
Less: net income attributable to noncontrolling interests	523	491	1,569	1,738
Net income attributable to BBVA Compass Bancshares, Inc.	119,828	129,149	280,551	413,972
Average assets	90,900,339	89,886,097	91,878,427	87,697,522
Operating Segments \| Consumer and Commercial Banking
Segment Reporting Information [Line Items]
Net interest income (expense)	562,339	508,900	1,659,588	1,485,992
Provision (credit) for loan losses	52,358	27,562	167,559	79,477
Noninterest income	209,131	221,063	622,523	627,255
Noninterest expense	476,830	469,335	1,424,343	1,361,989
Net income before income tax expense	242,282	233,066	690,209	671,781
Income tax expense (benefit)	84,799	81,573	241,573	235,123
Net income	157,483	151,493	448,636	436,658
Less: net income attributable to noncontrolling interests	107	65	306	448
Net income attributable to BBVA Compass Bancshares, Inc.	157,376	151,428	448,330	436,210
Average assets	56,486,459	55,341,631	56,541,683	54,040,909
Operating Segments \| Corporate and Investment Banking
Segment Reporting Information [Line Items]
Net interest income (expense)	26,338	40,505	102,050	119,259
Provision (credit) for loan losses	18,208	24,466	87,729	41,714
Noninterest income	50,804	27,514	138,982	117,131
Noninterest expense	34,679	38,044	144,047	115,572
Net income before income tax expense	24,255	5,509	9,256	79,104
Income tax expense (benefit)	8,489	1,928	3,239	27,686
Net income	15,766	3,581	6,017	51,418
Less: net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to BBVA Compass Bancshares, Inc.	15,766	3,581	6,017	51,418
Average assets	10,980,519	12,578,897	11,960,225	12,459,085
Operating Segments \| Treasury
Segment Reporting Information [Line Items]
Net interest income (expense)	(1,512)	6,228	(18,114)	25,026
Provision (credit) for loan losses	0	0	0	0
Noninterest income	7,960	7,879	47,407	71,072
Noninterest expense	5,101	4,656	15,289	14,683
Net income before income tax expense	1,347	9,451	14,004	81,415
Income tax expense (benefit)	471	3,308	4,901	28,495
Net income	876	6,143	9,103	52,920
Less: net income attributable to noncontrolling interests	420	426	1,271	1,290
Net income attributable to BBVA Compass Bancshares, Inc.	456	5,717	7,832	51,630
Average assets	16,462,880	15,085,951	16,395,875	14,288,092
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Net interest income (expense)	(72,356)	(47,759)	(207,595)	(121,389)
Provision (credit) for loan losses	(5,459)	(22,877)	9,737	(3,860)
Noninterest income	(4,130)	4,264	(13,696)	1,718
Noninterest expense	39,661	45,340	105,773	143,914
Net income before income tax expense	(110,688)	(65,958)	(336,801)	(259,725)
Income tax expense (benefit)	(56,914)	(34,381)	(155,165)	(134,439)
Net income	(53,774)	(31,577)	(181,636)	(125,286)
Less: net income attributable to noncontrolling interests	(4)	0	(8)	0
Net income attributable to BBVA Compass Bancshares, Inc.	(53,770)	(31,577)	(181,628)	(125,286)
Average assets	$ 6,970,481	$ 6,879,618	$ 6,980,644	$ 6,909,436

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	3 Months Ended		9 Months Ended
Related Party Transactions (Details) - USD ($)	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Aug. 01, 2014	Mar. 16, 2012
Related Party Transaction [Line Items]
Securities purchased under agreements to resell	$ 317,864,000		$ 317,864,000		$ 279,106,000
Securities sold under agreements to repurchase	86,178,000		86,178,000		76,609,000
Preferred stock	229,475,000		229,475,000		229,475,000
Preferred stock dividends			11,185,000	$ 1,037,000
BSI \| Line of Credit \| BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Due from related parties	50,000,000		50,000,000		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	0		0		0		$ 420,000,000
BBVA
Related Party Transaction [Line Items]
Securities purchased under agreements to resell	16,406,000		16,406,000		26,404,000
Securities sold under agreements to repurchase	82,942,000		82,942,000		74,049,000
BBVA \| BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Revenue from related parties	6,500,000	$ 2,700,000	9,300,000	9,300,000
Fees on agreements	6,600,000	5,600,000	19,200,000	17,500,000
Derivatives designated as hedging instrument \| BBVA
Related Party Transaction [Line Items]
Derivative, notional amount	5,400,000,000		5,400,000,000		5,300,000,000
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	(58,934,000)		(58,934,000)		(20,082,000)
Revolving Note And Cash Subordinated Agreement \| BSI \| BBVA Compass Bancshares, Inc.
Related Party Transaction [Line Items]
Interest expense	1,100,000	$ 587,000	2,700,000	$ 1,700,000
Commercial Loan \| BBVA
Related Party Transaction [Line Items]
Revenue from related parties			444,000,000
Other Noninterest Income \| Commercial Loan \| BBVA
Related Party Transaction [Line Items]
Related party transaction amount			1,500,000
Preferred Stock \| Series A Preferred Stock \| BBVA
Related Party Transaction [Line Items]
Preferred stock	229,000,000		229,000,000
Preferred stock dividends	3,500,000		10,100,000
Cash flow hedges \| Derivatives designated as hedging instrument \| BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	(389,000)		(389,000)		(40,000)
Fair value hedges \| BBVA
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ 34,082,000		$ 34,082,000		$ (9,405,000)