UMB Financial (UMBF) 10-Q 3 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 26, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	UMBF
Entity Registrant Name	UMB FINANCIAL CORP
Entity Central Index Key	101,382
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		49,481,352

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Loans	$ 9,699,631	$ 9,430,761
Allowance for loan losses	(80,398)	(81,143)
Net loans	9,619,233	9,349,618
Loans held for sale	4,830	589
Investment securities:
Available for sale	6,883,312	6,806,949
Held to maturity (fair value of $859,328 and $691,379, respectively)	804,652	667,106
Trading securities	26,779	29,617
Other securities	64,591	65,198
Total investment securities	7,779,334	7,568,870
Federal funds sold and securities purchased under agreements to resell	170,824	173,627
Interest-bearing due from banks	401,961	522,877
Cash and due from banks	325,446	458,217
Premises and equipment, net	279,079	281,471
Accrued income	90,002	90,127
Goodwill	228,396	228,346
Other intangibles, net	43,556	46,782
Other assets	360,252	373,721
Total assets	19,302,913	19,094,245
Deposits:
Noninterest-bearing demand	6,202,026	6,306,895
Interest-bearing demand and savings	8,178,712	7,529,972
Time deposits under $250,000	727,709	771,973
Time deposits of $250,000 or more	309,926	483,912
Total deposits	15,418,373	15,092,752
Federal funds purchased and repurchase agreements	1,681,723	1,818,062
Short-term debt	5,006	5,009
Long-term debt	85,238	86,070
Accrued expenses and taxes	116,408	161,245
Other liabilities	48,206	37,413
Total liabilities	17,354,954	17,200,551
SHAREHOLDERS' EQUITY
Common stock, $1.00 par value; 80,000,000 shares authorized, 55,056,730 shares issued, and 49,467,214 and 49,396,366 shares outstanding, respectively	55,057	55,057
Capital surplus	1,017,420	1,019,889
Retained earnings	1,058,131	1,033,990
Accumulated other comprehensive income (loss), net	32,468	(3,718)
Treasury stock, 5,589,516 and 5,660,364 shares, at cost, respectively	(215,117)	(211,524)
Total shareholders' equity	1,947,959	1,893,694
Total liabilities and shareholders' equity	$ 19,302,913	$ 19,094,245

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Held to Maturity, Fair value	$ 859,328	$ 691,379
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	55,056,730	55,056,730
Common stock, shares outstanding	49,467,214	49,396,366
Treasury stock, shares	5,589,516	5,660,364

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
INTEREST INCOME
Loans	$ 90,544	$ 64,232
Securities:
Taxable interest	19,357	18,808
Tax-exempt interest	12,735	9,915
Total securities income	32,092	28,723
Federal funds and resell agreements	507	51
Interest-bearing due from banks	891	852
Trading securities	52	95
Total interest income	124,086	93,953
INTEREST EXPENSE
Deposits	4,055	3,048
Federal funds and repurchase agreements	1,230	492
Other	909	55
Total interest expense	6,194	3,595
Net interest income	117,892	90,358
Provision for loan losses	5,000	3,000
Net interest income after provision for loan losses	112,892	87,358
NONINTEREST INCOME
Trust and securities processing	59,485	67,299
Trading and investment banking	4,630	6,122
Service charges on deposit accounts	21,461	21,541
Insurance fees and commissions	1,497	570
Brokerage fees	4,185	2,854
Bankcard fees	18,016	16,183
Gain on sales of securities available for sale, net	2,933	7,336
Equity losses on alternative investments	(381)	(842)
Other	4,524	4,144
Total noninterest income	116,350	125,207
NONINTEREST EXPENSE
Salaries and employee benefits	107,150	98,537
Occupancy, net	10,972	10,010
Equipment	16,282	14,172
Supplies and services	4,949	4,325
Marketing and business development	4,441	4,618
Processing fees	11,462	12,783
Legal and consulting	4,799	4,378
Bankcard	5,815	4,768
Amortization of other intangible assets	3,226	2,755
Regulatory fees	3,429	2,756
Other	8,219	5,311
Total noninterest expense	180,744	164,413
Income before income taxes	48,498	48,152
Income tax expense	12,253	14,387
NET INCOME	$ 36,245	$ 33,765
PER SHARE DATA
Net income - basic	$ 0.74	$ 0.75
Net income - diluted	0.74	0.74
Dividends	$ 0.245	$ 0.235
Weighted average shares outstanding - basic	48,756,433	45,000,831
Weighted average shares outstanding - diluted	49,090,232	45,437,654

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 36,245	$ 33,765
Unrealized gains on securities:
Change in unrealized holding gains, net	65,312	32,676
Less: Reclassifications adjustment for gains included in net income	(2,933)	(7,336)
Change in unrealized gains on securities during the period	62,379	25,340
Change in unrealized losses on derivative hedges	(4,140)
Income tax expense	(22,053)	(9,536)
Other comprehensive income	36,186	15,804
Comprehensive income	$ 72,431	$ 49,569

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Beginning Balance at Dec. 31, 2014	$ 1,643,758	$ 55,057	$ 894,602	$ 963,911	$ 11,006	$ (280,818)
Total comprehensive income	49,569			33,765	15,804
Dividends	(10,753)			(10,753)
Purchase of treasury stock	(5,309)					(5,309)
Issuance of equity awards	460		(5,848)			6,308
Recognition of equity based compensation	2,609		2,609
Net tax benefit related to equity compensation plans	585		585
Sale of treasury stock	235		141			94
Exercise of stock options	1,222		569			653
Ending Balance at Mar. 31, 2015	1,682,376	55,057	892,658	986,923	26,810	(279,072)
Beginning Balance at Dec. 31, 2015	1,893,694	55,057	1,019,889	1,033,990	(3,718)	(211,524)
Total comprehensive income	72,431			36,245	36,186
Dividends	(12,104)			(12,104)
Purchase of treasury stock	(12,880)					(12,880)
Issuance of equity awards	429		(6,199)			6,628
Recognition of equity based compensation	2,347		2,347
Net tax deficiency related to equity compensation plans	(34)		(34)
Sale of treasury stock	263		123			140
Exercise of stock options	3,813		1,294			2,519
Ending Balance at Mar. 31, 2016	$ 1,947,959	$ 55,057	$ 1,017,420	$ 1,058,131	$ 32,468	$ (215,117)

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Dividends, per share	$ 0.245	$ 0.235

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net income	$ 36,245	$ 33,765
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	5,000	3,000
Net accretion of premiums and discounts from acquisition	(604)
Depreciation and amortization	13,705	11,792
Deferred income tax benefit	(1,417)	(1,523)
Net decrease (increase) in trading securities and other earning assets	3,219	(1,335)
Gains on sales of securities available for sale	(2,933)	(7,336)
(Gains) losses on sales of assets	(268)	81
Amortization of securities premiums, net of discount accretion	14,553	13,547
Originations of loans held for sale	(14,345)	(25,586)
Net gains on sales of loans held for sale	(199)	(342)
Proceeds from sales of loans held for sale	10,303	23,411
Equity based compensation	2,776	3,069
Changes in:
Accrued income	125	(786)
Accrued expenses and taxes	(40,439)	(25,614)
Other assets and liabilities, net	2,025	(3,834)
Net cash provided by operating activities	27,746	22,309
Investing Activities
Proceeds from maturities of securities held to maturity	8,672	15,712
Proceeds from sales of securities available for sale	282,031	466,422
Proceeds from maturities of securities available for sale	391,494	338,956
Purchases of securities held to maturity	(146,670)	(84,631)
Purchases of securities available for sale	(702,529)	(768,272)
Net increase in loans	(274,053)	(33,928)
Net decrease in fed funds sold and resell agreements	2,803	93,726
Net decrease in interest bearing balances due from other financial institutions	33,693	12,691
Purchases of premises and equipment	(8,499)	(14,854)
Proceeds from sales of premises and equipment	680	29
Net cash (used in) provided by investing activities	(412,378)	25,851
Financing Activities
Net increase (decrease) in demand and savings deposits	543,871	(66,491)
Net decrease in time deposits	(217,851)	(394,080)
Net increase in fed funds purchased and repurchase agreements	(136,339)	(306,052)
Repayment of long-term debt	(1,092)	(1,210)
Payment of contingent consideration on acquisitions	(3,031)	(18,702)
Cash dividends paid	(12,082)	(10,716)
Net tax (deficiency) benefit related to equity compensation plans	(34)	585
Proceeds from exercise of stock options and sales of treasury shares	4,076	1,457
Purchases of treasury stock	(12,880)	(5,309)
Net cash provided by (used in) financing activities	164,638	(800,518)
Decrease in cash and cash equivalents	(219,994)	(752,358)
Cash and cash equivalents at beginning of period	819,112	1,787,230
Cash and cash equivalents at end of period	599,118	1,034,872
Supplemental Disclosures:
Income taxes paid	12,146	14,469
Total interest paid	$ 6,539	$ 3,668

Financial Statement Presentatio

Financial Statement Presentation	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Financial Statement Presentation	1. Financial Statement Presentation The consolidated financial statements include the accounts of UMB Financial Corporation and its subsidiaries (collectively, the Company) after elimination of all intercompany transactions. In the opinion of management of the Company, all adjustments, which were of a normal recurring nature and necessary for a fair presentation of the financial position and results of operations have been made. The results of operations and cash flows for the interim periods presented may not be indicative of the results of the full year. The financial statements should be read in conjunction with “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” within this Quarterly Report on Form 10-Q and in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015 filed with the Securities and Exchange Commission (SEC) on February 25, 2016 (the Form 10-K).

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies The Company is a financial holding company, which offers a wide range of banking and other financial services to its customers through its branches and offices in the states of Missouri, Kansas, Colorado, Illinois, Oklahoma, Texas, Arizona, Nebraska, Pennsylvania, South Dakota, Indiana, Utah, Minnesota, California, and Wisconsin. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. These estimates and assumptions also impact reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. A summary of the significant accounting policies to assist the reader in understanding the financial presentation is provided in the Notes to Consolidated Financial Statements in the Form 10-K. Cash and cash equivalents Cash and cash equivalents include Cash and due from banks and amounts due from the Federal Reserve Bank. Cash on hand, cash items in the process of collection, and amounts due from correspondent banks are included in Cash and due from banks. Amounts due from the Federal Reserve Bank are interest-bearing for all periods presented and are included in the Interest-bearing due from banks line on the Company’s Consolidated Balance Sheets. This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of March 31, 2016 and March 31, 2015 (in thousands) March 31, 2016 2015 Due from the Federal Reserve $ 273,672 $ 585,557 Cash and due from banks 325,446 449,315 Cash and cash equivalents at end of period $ 599,118 $ 1,034,872 Also included in the Interest-bearing due from banks line, but not considered cash and cash equivalents are interest-bearing accounts held at other financial institutions, which totaled $128.3 million and $180.8 million at March 31, 2016 and March 31, 2015, respectively. Per Share Data Basic income per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted income per share includes the dilutive effect of 333,799 and 436,823 shares of common stock issuable upon the exercise of outstanding stock options at March 31, 2016 and 2015, respectively. Options issued under employee benefit plans to purchase 660,802 and 498,488 shares of common stock were outstanding at March 31, 2016 and 2015, respectively, but were not included in the computation of diluted income per share because the options were anti-dilutive.

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2016
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	3. New Accounting Pronouncements Revenue Recognition Stock Compensation Going Concern Derivatives and Hedging Consolidation Financial Instruments Leases Extinguishments of Liabilities Derivatives and Hedging Stock Compensation

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Loans and Allowance for Loan Losses	4. Loans and Allowance for Loan Losses Loan Origination/Risk Management The Company has certain lending policies and procedures in place that are designed to minimize the level of risk within the loan portfolio. Diversification of the loan portfolio manages the risk associated with fluctuations in economic conditions. Authority levels are established for the extension of credit to ensure consistency throughout the Company. It is necessary that policies, processes and practices implemented to control the risks of individual credit transactions and portfolio segments are sound and adhered to. The Company maintains an independent loan review department that reviews and validates the risk assessment on a continual basis. Management regularly evaluates the results of the loan reviews. The loan review process complements and reinforces the risk identification and assessment decisions made by lenders and credit personnel, as well as the Company’s policies and procedures. Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and prudently expand its business. Commercial loans are made based on the identified cash flows of the borrower and on the underlying collateral provided by the borrower. The cash flows of the borrower, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts from its customers. Commercial credit cards are generally unsecured and are underwritten with criteria similar to commercial loans including an analysis of the borrower’s cash flow, available business capital, and overall credit-worthiness of the borrower. Asset-based loans are offered primarily in the form of revolving lines of credit to commercial borrowers that do not generally qualify for traditional bank financing. Asset-based loans are underwritten based primarily upon the value of the collateral pledged to secure the loan, rather than on the borrower’s general financial condition as traditionally reflected by cash flow, balance sheet strength, operating results, and credit bureau ratings. The Company utilizes pre-loan due diligence techniques, monitoring disciplines, and loan management practices common within the asset-based lending industry to underwrite loans to these borrowers. Factoring loans provide working capital through the purchase and/or financing of accounts receivable to borrowers in the transportation industry and to commercial borrowers that do not generally qualify for traditional bank financing. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans, in addition to those of real estate loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts, and the repayment of these loans is largely dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. The Company requires that an appraisal of the collateral be made at origination and on an as-needed basis, in conformity with current market conditions and regulatory requirements. The underwriting standards address both owner and non-owner occupied real estate. Construction loans are underwritten using feasibility studies, independent appraisal reviews, sensitivity analysis or absorption and lease rates and financial analysis of the developers and property owners. Construction loans are based upon estimates of costs and value associated with the complete project. Construction loans often involve the disbursement of substantial funds with repayment substantially dependent on the success of the ultimate project. Sources of repayment for these types of loans may be pre-committed permanent loans, sales of developed property or an interim loan commitment from the Company until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their repayment being sensitive to interest rate changes, governmental regulation of real property, economic conditions, and the availability of long-term financing. Underwriting standards for residential real estate and home equity loans are based on the borrower’s loan-to-value percentage, collection remedies, and overall credit history. Consumer loans are underwritten based on the borrower’s repayment ability. The Company monitors delinquencies on all of its consumer loans and leases and periodically reviews the distribution of FICO scores relative to historical periods to monitor credit risk on its credit card loans. The underwriting and review practices combined with the relatively small loan amounts that are spread across many individual borrowers, minimizes risk. Consumer loans and leases that are 90 days past due or more are considered non-performing. Credit risk is a potential loss resulting from nonpayment of either the primary or secondary exposure. Credit risk is mitigated with formal risk management practices and a thorough initial credit-granting process including consistent underwriting standards and approval process. Control factors or techniques to minimize credit risk include knowing the client, understanding total exposure, analyzing the client and debtor’s financial capacity, and monitoring the client’s activities. Credit risk and portions of the portfolio risk are managed through concentration considerations, average risk ratings, and other aggregate characteristics. The loan portfolio is comprised of loans originated by the Company and loans purchased in connection with the Company’s acquisition of Marquette Financial Companies (Marquette) on May 31, 2015 (the Acquisition Date). The purchased loans were recorded at estimated fair value at the Acquisition Date with no carryover of the related allowance. The purchased loans were segregated between those considered to be performing, non-purchased credit impaired loans (Non-PCI), and those with evidence of credit deterioration, purchased credit impaired loans (PCI). Purchased loans are considered impaired if there is evidence of credit deterioration and if it is probable, at acquisition, that all contractually required payments will not be collected. At the Acquisition Date, gross loans from the Marquette acquisition had a fair value of $980.4 million split between Non-PCI loans totaling $972.6 million and PCI loans totaling $7.8 million. The gross contractually required principal and interest payments receivable for the Non-PCI loans and PCI loans totaled $983.9 million and $9.3 million, respectively. The fair value estimates for purchased loans are based on expected prepayments and the amount and timing of discounted expected principal, interest and other cash flows. Credit discounts representing the principal losses expected over the life of the loan are also a component of the initial fair value. In determining the Acquisition Date fair value of PCI loans, and in subsequent accounting, the Company generally aggregated purchased commercial, real estate, and consumer loans into pools of loans with common risk characteristics. The difference between the fair value of Non-PCI loans and contractual amounts due at the Acquisition Date is accreted into income over the estimated life of the loans. Contractual amounts due represent the total undiscounted amount of all uncollected principal and interest payments. Loans accounted for under ASC Topic 310-30 The excess of PCI loans’ contractual amounts due over the amount of undiscounted cash flows expected to be collected is referred to as the non-accretable difference. The non-accretable difference, which is neither accreted into income nor recorded on the consolidated balance sheet, reflects estimated future credit losses and uncollectible contractual interest expected to be incurred over the life of the PCI loans. The excess cash flows expected to be collected over the carrying amount of PCI loans is referred to as the accretable yield. This amount is accreted into interest income over the remaining life of the purchased loans or pools using the level yield method. The accretable yield is affected by changes in interest rate indices for variable rate loans, changes in prepayment speed assumptions, and changes in expected principal and interest payments over the estimated lives of the PCI loans. Each quarter the Company evaluates the remaining contractual amounts due and estimates cash flows expected to be collected over the life of the PCI loans. Contractual amounts due may increase or decrease for a variety of reasons, for example, when the contractual terms of the loan agreement are modified, when interest rates on variable rate loans change, or when principal and/or interest payments are received. Cash flows expected to be collected on PCI loans are estimated by incorporating several key assumptions similar to the initial estimate of fair value. These key assumptions include probability of default, loss given default, and the amount of actual prepayments after the Acquisition Date. Prepayments affect the estimated lives of loans and could change the amount of interest income, and possibly principal, expected to be collected. In re-forecasting future estimated cash flows, credit loss expectations are adjusted as necessary. The adjustments are based, in part, on actual loss severities recognized for each loan type, as well as changes in the probability of default. For periods in which estimated cash flows are not reforecasted, the prior reporting period’s estimated cash flows are adjusted to reflect the actual cash received and credit events that transpired during the current reporting period. Increases in expected cash flows of PCI loans subsequent to the Acquisition Date are recognized prospectively through adjustments of the yield on the loans or pools over their remaining lives, while decreases in expected cash flows are recognized as impairment through a provision for loan losses and an increase in the allowance. The PCI loans are accounted for in accordance with ASC Topic 310-30, Loans and Debt Securities Purchased with Deteriorated Credit Quality Below is the composition of the net book value for the PCI loans accounted for under ASC 310-30 at March 31, 2016 (in thousands) PCI Loans: At March 31, 2016 Contractual cash flows $ 3,302 Non-accretable difference (647 ) Accretable yield (118 ) Loans accounted for under ASC 310-30 $ 2,537 Loan Aging Analysis This table provides a summary of loan classes and an aging of past due loans at March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 30-89 Greater Non- Accrual Total Due PCI Current Total Loans Loans Commercial: Commercial $ 20,035 $ 465 $ 39,371 $ 59,871 $ — $ 4,287,197 $ 4,347,068 Asset-based — — — — — 212,669 212,669 Factoring — — — — — 88,534 88,534 Commercial – credit card 333 20 25 378 — 145,653 146,031 Real estate: Real estate –construction 1,033 906 232 2,171 — 495,333 497,504 Real estate – commercial 4,234 — 8,403 12,637 1,023 2,753,573 2,767,233 Real estate – residential 2,326 — 836 3,162 — 482,560 485,722 Real estate – HELOC 1,737 — 3,094 4,831 — 719,472 724,303 Consumer: Consumer – credit card 2,085 1,780 360 4,225 — 266,333 270,558 Consumer – other 6,594 145 2,613 9,352 1,514 106,105 116,971 Leases 49 — — 49 — 42,989 43,038 Total loans $ 38,426 $ 3,316 $ 54,934 $ 96,676 $ 2,537 $ 9,600,418 $ 9,699,631 March 31, 2016 30-89 Greater Current Total Loans PCI Loans Commercial: Commercial $ — $ — $ — $ — Asset-based — — — — Factoring — — — — Commercial – credit card — — — — Real estate: Real estate – construction — — — — Real estate – commercial — 1,023 — 1,023 Real estate – residential — — — — Real estate – HELOC — — — — Consumer: Consumer – credit card — — — — Consumer – other 75 35 1,404 1,514 Leases — — — — Total PCI loans $ 75 $ 1,058 $ 1,404 $ 2,537 December 31, 2015 30-89 Greater Non- Accrual Total Due PCI Current Total Loans Loans Commercial: Commercial $ 5,821 $ 2,823 $ 43,841 $ 52,485 $ — $ 4,153,251 $ 4,205,736 Asset-based — — — — — 219,244 219,244 Factoring — — — — — 90,686 90,686 Commercial – credit card 614 24 13 651 — 124,710 125,361 Real estate: Real estate –construction 1,828 548 331 2,707 — 413,861 416,568 Real estate – commercial 2,125 1,630 9,578 13,333 1,055 2,648,384 2,662,772 Real estate – residential 612 35 800 1,447 — 490,780 492,227 Real estate – HELOC 129 — 3,524 3,653 — 726,310 729,963 Consumer: Consumer – credit card 2,256 2,089 468 4,813 — 286,757 291,570 Consumer – other 5,917 175 2,597 8,689 2,001 144,087 154,777 Leases — — — — — 41,857 41,857 Total loans $ 19,302 $ 7,324 $ 61,152 $ 87,778 $ 3,056 $ 9,339,927 $ 9,430,761 December 31, 2015 30-89 Greater Current Total Loans PCI Loans Commercial: Commercial $ — $ — $ — $ — Asset-based — — — — Factoring — — — — Commercial – credit card — — — — Real estate: Real estate – construction — — — — Real estate – commercial — 1,055 — 1,055 Real estate – residential — — — — Real estate – HELOC — — — — Consumer: Consumer – credit card — — — — Consumer – other 58 105 1,838 2,001 Leases — — — — Total PCI loans $ 58 $ 1,160 $ 1,838 $ 3,056 The Company sold residential real estate loans with proceeds of $10.3 million and $23.4 million in the secondary market without recourse during the periods ended March 31, 2016 and March 31, 2015, respectively. The Company has ceased the recognition of interest on loans with a carrying value of $54.9 million and $61.2 million at March 31, 2016 and December 31, 2015, respectively. Restructured loans totaled $46.0 million and $36.6 million at March 31, 2016 and December 31, 2015. Loans 90 days past due and still accruing interest amounted to $3.3 million and $7.3 million at March 31, 2016 and December 31, 2015, respectively. There was an insignificant amount of interest recognized on impaired loans during 2016 and 2015. Credit Quality Indicators As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including trends related to the risk grading of specified classes of loans, net charge-offs, non-performing loans, and general economic conditions. The Company utilizes a risk grading matrix to assign a rating to each of its commercial, commercial real estate, and construction real estate loans. The loan rankings are summarized into the following categories: Non-watch list, Watch, Special Mention, and Substandard. Any loan not classified in one of the categories described below is considered to be a Non-watch list loan. A description of the general characteristics of the loan ranking categories is as follows: • Watch • Special Mention • Substandard All other classes of loans are generally evaluated and monitored based on payment activity. Non-performing loans include restructured loans on non-accrual and all other non-accrual loans. This table provides an analysis of the credit risk profile of each loan class excluded from ASC 310-30 at March 31, 2016 and December 31, 2015 (in thousands): Credit Exposure Credit Risk Profile by Risk Rating Originated and Non-PCI Loans Commercial Asset-based Factoring March 31, 2016 December 31, March 31, 2016 December 31, March 31, 2016 December 31, Non-watch list $ 3,968,381 $ 3,880,109 $ 179,027 $ 198,903 $ 88,089 $ 90,449 Watch 147,208 105,539 — — — — Special Mention 40,095 29,397 28,142 18,163 9 237 Substandard 191,384 190,691 5,500 2,178 436 — Total $ 4,347,068 $ 4,205,736 $ 212,669 $ 219,244 $ 88,534 $ 90,686 Real estate – construction Real estate – commercial March 31, 2016 December 31, March 31, 2016 December 31, Non-watch list $ 488,546 $ 415,258 $ 2,673,502 $ 2,561,401 Watch 4,346 370 37,764 51,774 Special Mention 3,835 — 19,426 22,544 Substandard 777 940 35,518 25,998 Total $ 497,504 $ 416,568 $ 2,766,210 $ 2,661,717 Credit Exposure Credit Risk Profile Based on Payment Activity Originated and Non-PCI Loans Commercial – credit card Real estate – residential Real estate – HELOC March 31, 2016 December 31, March 31, 2016 December 31, March 31, 2016 December 31, Performing $ 146,006 $ 125,348 $ 484,886 $ 491,427 $ 721,209 $ 726,439 Non-performing 25 13 836 800 3,094 3,524 Total $ 146,031 $ 125,361 $ 485,722 $ 492,227 $ 724,303 $ 729,963 Consumer – credit card Consumer – other Leases March 31, 2016 December 31, March 31, 2016 December 31, March 31, 2016 December 31, Performing $ 270,198 $ 291,102 $ 114,358 $ 152,180 $ 43,038 $ 41,857 Non-performing 360 468 2,613 2,597 — — Total $ 270,558 $ 291,570 $ 116,971 $ 154,777 $ 43,038 $ 41,857 This table provides an analysis of the credit risk profile of each loan class accounted for under ASC 310-30 at March 31, 2016 and December 31, 2015 (in thousands): Credit Exposure Credit Risk Profile by Risk Rating PCI Loans Credit Risk Profile Based on Payment Activity PCI Loans Real estate – commercial Consumer – other March 31, 2016 December 31, March 31, 2016 December 31, Non-watch list $ — $ — Performing $ 1,514 $ 2,001 Watch — — Non-performing — — Special Mention — — Total $ 1,514 $ 2,001 Substandard 1,023 1,055 Total $ 1,023 $ 1,055 Allowance for Loan Losses The allowance for loan losses is a reserve established through a provision for loan losses charged to expense, which represents management’s judgment of inherent probable losses within the Company’s loan portfolio as of the balance sheet date. The allowance is necessary to reserve for estimated loan losses and risks inherent in the loan portfolio. Accordingly, the methodology is based on historical loss trends. The Company’s process for determining the appropriate level of the allowance for loan losses is designed to account for credit deterioration as it occurs. The provision for probable loan losses reflects loan quality trends, including the levels of and trends related to non-accrual loans, past due loans, potential problem loans, criticized loans and net charge-offs or recoveries, among other factors. The level of the allowance reflects management’s continuing evaluation of industry concentrations, specific credit risks, loan loss experience, current loan portfolio quality, present economic, political and regulatory conditions and estimated losses inherent in the current loan portfolio. Portions of the allowance may be allocated for specific loans; however, the entire allowance is available for any loan that, in management’s judgment, should be charged off. While management utilizes its best judgment and information available, the adequacy of the allowance is dependent upon a variety of factors beyond the Company’s control, including, among other things, the performance of the Company’s loan portfolio, the economy, changes in interest rates and changes in the regulatory environment. The Company’s allowance for loan losses consists of specific valuation allowances and general valuation allowances based on historical loan loss experience for similar loans with similar characteristics and trends, general economic conditions and other qualitative risk factors both internal and external to the Company. The allowances established for probable losses on specific loans are based on a regular analysis and evaluation of impaired loans. Loans are classified based on an internal risk grading process that evaluates the obligor’s ability to repay, the underlying collateral, if any, and the economic environment and industry in which the borrower operates. When a loan is considered impaired, the loan is analyzed to determine the need, if any, to specifically allocate a portion of the allowance for loan losses to the loan. Specific valuation allowances are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk ranking of the loan and economic conditions affecting the borrower’s industry. General valuation allowances are calculated based on the historical loss experience of specific types of loans including an evaluation of the time span and volume of the actual charge-off. The Company calculates historical loss ratios for pools of similar loans with similar characteristics based on the proportion of actual charge-offs experienced to the total population of loans in the pool. The historical loss ratios are updated based on actual charge-off experience. A valuation allowance is established for each pool of similar loans based upon the product of the historical loss ratio, time span to charge-off, and the total dollar amount of the loans in the pool. The Company’s pools of similar loans include similarly risk-graded groups of commercial loans, commercial real estate loans, commercial credit card, home equity loans, consumer real estate loans and consumer and other loans. The Company also considers a loan migration analysis for criticized loans. This analysis includes an assessment of the probability that a loan will move to a loss position based on its risk rating. The consumer credit card pool is evaluated based on delinquencies and credit scores. In addition, a portion of the allowance is determined by a review of qualitative factors by Management. Generally, the unsecured portion of a commercial or commercial real estate loan is charged off when, after analyzing the borrower’s financial condition, it is determined that the borrower is incapable of servicing the debt, little or no prospect for near term improvement exists, and no realistic and significant strengthening action is pending. For collateral dependent commercial or commercial real estate loans, an analysis is completed regarding the Company’s collateral position to determine if the amounts due from the borrower are in excess of the calculated current fair value of the collateral. Specific allocations of the allowance for loan losses are made for any collateral deficiency. If a collateral deficiency is ultimately deemed to be uncollectible, the amount is charged off. Revolving commercial loans (such as commercial credit cards) which are past due 90 cumulative days are classified as a loss and charged off. Generally, a consumer loan, or a portion thereof, is charged off in accordance with regulatory guidelines which provide that such loans be charged off when the Company becomes aware of the loss, such as from a triggering event that may include, but is not limited to, new information about a borrower’s intent and ability to repay the loan, bankruptcy, fraud, or death. However, the charge-off timeframe should not exceed the specified delinquency time frames, which state that closed-end retail loans (such as real estate mortgages, home equity loans and consumer installment loans) that become past due 120 cumulative days and open-end retail loans (such as home equity lines of credit and consumer credit cards) that become past due 180 cumulative days are classified as a loss and charged off. ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT IN LOANS This table provides a rollforward of the allowance for loan losses by portfolio segment for three months ended March 31, 2016 (in thousands): Three Months Ended March 31, 2016 Commercial Real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 63,847 $ 8,220 $ 8,949 $ 127 $ 81,143 Charge-offs (5,075 ) (1,445 ) (2,515 ) — (9,035 ) Recoveries 2,489 144 657 — 3,290 Provision 47 2,990 1,969 (6 ) 5,000 Ending balance $ 61,308 $ 9,909 $ 9,060 $ 121 $ 80,398 Ending balance: individually evaluated for impairment $ 4,163 $ 1,210 $ — $ — $ 5,373 Ending balance: collectively evaluated for impairment 57,145 8,699 9,060 121 75,025 Ending Balance: PCI Loans — — — — — Loans: Ending balance: loans $ 4,794,302 $ 4,474,762 $ 387,529 $ 43,038 $ 9,699,631 Ending balance: individually evaluated for impairment 67,486 6,278 2,612 — 76,376 Ending balance: collectively evaluated for impairment 4,726,816 4,467,461 383,403 43,038 9,620,718 Ending Balance: PCI Loans — 1,023 1,514 — 2,537 ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT IN LOANS This table provides a rollforward of the allowance for loan losses by portfolio segment for three months ended March 31, 2015 (in thousands): Three Months Ended March 31, 2015 Commercial Real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 55,349 $ 10,725 $ 9,921 $ 145 $ 76,140 Charge-offs (412 ) (32 ) (2,704 ) — (3,148 ) Recoveries 810 15 662 — 1,487 Provision (88 ) 1,204 1,901 (17 ) 3,000 Ending balance $ 55,659 $ 11,912 $ 9,780 $ 128 $ 77,479 Ending balance: individually evaluated for impairment $ 1,223 $ 2,925 $ — $ — $ 4,148 Ending balance: collectively evaluated for impairment 54,436 8,987 9,780 128 73,331 Loans: Ending balance: loans $ 3,938,523 $ 3,160,418 $ 360,550 $ 38,817 $ 7,498,308 Ending balance: individually evaluated for impairment 13,839 14,844 — — 28,683 Ending balance: collectively evaluated for impairment 3,924,684 3,145,574 360,550 38,817 7,469,625 Impaired Loans This table provides an analysis of impaired loans by class at March 31, 2016 and December 31, 2015 (in thousands): As of March 31, 2016 Unpaid Recorded Recorded Total Related Average Recorded Commercial: Commercial $ 72,511 $ 38,422 $ 29,064 $ 67,486 $ 4,163 $ 67,744 Asset-based — — — — — — Factoring — — — — — — Commercial – credit card — — — — — — Real estate: Real estate – construction 781 318 118 436 35 443 Real estate – commercial 7,098 3,375 1,365 4,740 1,175 5,453 Real estate – residential 961 899 — 899 — 919 Real estate – HELOC 231 203 — 203 — 198 Consumer: Consumer – credit card — — — — — — Consumer – other 2,594 2,594 — 2,594 — 2,584 Leases — — — — — — Total $ 84,176 $ 45,811 $ 30,547 $ 76,358 $ 5,373 $ 77,341 As of December 31, 2015 Unpaid Recorded Recorded Total Related Average Recorded Commercial: Commercial $ 72,739 $ 40,648 $ 27,356 $ 68,004 $ 5,668 $ 41,394 Asset-based — — — — — — Factoring — — — — — — Commercial – credit card — — — — — — Real estate: Real estate – construction 782 331 118 449 42 802 Real estate – commercial 7,117 4,891 1,275 6,166 154 7,768 Real estate – residential 1,054 939 — 939 — 1,433 Real estate – HELOC 214 193 — 193 — 162 Consumer: Consumer – credit card — — — — — — Consumer – other 2,574 2,574 — 2,574 — 1,795 Leases — — — — — — Total $ 84,480 $ 49,576 $ 28,749 $ 78,325 $ 5,864 $ 53,354 Troubled Debt Restructurings A loan modification is considered a troubled debt restructuring (TDR) when a concession has been granted to a debtor experiencing financial difficulties. The Company’s modifications generally include interest rate adjustments, principal reductions, and amortization and maturity date extensions. These modifications allow the debtor short-term cash relief to allow them to improve their financial condition. The Company’s restructured loans are individually evaluated for impairment and evaluated as part of the allowance for loan loss as described above in the Allowance for Loan Losses section of this note. Purchased loans restructured after acquisition are not considered or reported as troubled debt restructurings if the loans evidenced credit deterioration as of the Acquisition Date and are accounted for in pools. For the three months ended March 31, 2016, no purchased loans were modified as troubled debt restructurings after the Acquisition Date. The Company had $823 thousand and $221 thousand in commitments to lend to borrowers with loan modifications classified as TDR’s as of March 31, 2016 and March 31, 2015, respectively. The Company monitors loan payments on an on-going basis to determine if a loan is considered to have a payment default. Determination of payment default involves analyzing the economic conditions that exist for each customer and their ability to generate positive cash flows during the loan term. During the three month period ended March 31, 2015, the Company had one commercial real estate loan classified as a TDR with a payment default totaling $178 thousand. A specific valuation allowance for the full amount of this loan had previously been established within the Company’s ALL, and this loan was charged off against the ALL during that period. This table provides a summary of loans restructured by class during the three months ended March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 Three Months Ended March 31, 2015 Number Pre- Modification Post- Modification Number Pre- Modification Post- Modification Troubled Debt Restructurings Commercial: Commercial 2 $ 12,056 $ 12,056 — $ — $ — Asset-based Factoring Commercial – credit card — — — — — — Real estate: Real estate – construction — — — — — — Real estate – commercial — — — — — — Real estate – residential — — — — — — Real estate – HELOC — — — — — — Consumer: Consumer – credit card — — — — — — Consumer – other — — — — — — Leases — — — — — — Total 2 $ 12,056 $ 12,056 — $ — $ —

Securities

Securities	3 Months Ended
	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	5. Securities Securities Available for Sale This table provides detailed information about securities available for sale at March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 Amortized Gross Gross Fair Value U.S. Treasury $ 353,828 $ 442 $ (9 ) $ 354,261 U.S. Agencies 593,489 424 (144 ) 593,769 Mortgage-backed 3,645,006 35,170 (11,638 ) 3,668,538 State and political subdivisions 2,154,346 33,312 (1,056 ) 2,186,602 Corporates 80,313 30 (201 ) 80,142 Total $ 6,826,982 $ 69,378 $ (13,048 ) $ 6,883,312 Gross Gross Amortized Unrealized Unrealized Fair December 31, 2015 Cost Gains Losses Value U.S. Treasury $ 350,354 $ 1 $ (576 ) $ 349,779 U.S. Agencies 667,414 7 (1,032 ) 666,389 Mortgage-backed 3,598,115 12,420 (38,089 ) 3,572,446 State and political subdivisions 2,116,543 23,965 (2,095 ) 2,138,413 Corporates 80,585 — (663 ) 79,922 Total $ 6,813,011 $ 36,393 $ (42,455 ) $ 6,806,949 The following table presents contractual maturity information for securities available for sale at March 31, 2016 (in thousands): Amortized Fair Cost Value Due in 1 year or less $ 1,056,562 $ 1,057,412 Due after 1 year through 5 years 1,162,717 1,176,382 Due after 5 years through 10 years 849,567 866,783 Due after 10 years 113,130 114,197 Total 3,181,976 3,214,774 Mortgage-backed securities 3,645,006 3,668,538 Total securities available for sale $ 6,826,982 $ 6,883,312 Securities may be disposed of before contractual maturities due to sales by the Company or because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. For the three months ended March 31, 2016, proceeds from the sales of securities available for sale were $282.0 million compared to $466.4 million for the same period in 2015. Securities transactions resulted in gross realized gains of $2.9 million and $7.3 million for the three months ended March 31, 2016 and 2015. There were no gross realized losses for the three months ended March 31, 2016 and 2015. Securities available for sale with a market value of $5.7 billion at March 31, 2016 and $5.9 billion at December 31, 2015 were pledged to secure U.S. Government deposits, other public deposits and certain trust deposits as required by law. Of this amount, securities with a market value of $1.5 billion at March 31, 2016 and $1.6 billion at December 31, 2015 were pledged at the Federal Reserve Discount Window but were unencumbered as of those dates. The following table shows the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2016 and December 31, 2015 (in thousands). March 31, 2016 Less than 12 months 12 months or more Total Description of Securities Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury $ 14,962 $ (9 ) $ — $ — $ 14,962 $ (9 ) U.S. Agencies 170,523 (144 ) — — 170,523 (144 ) Mortgage-backed 437,084 (2,352 ) 447,502 (9,286 ) 884,586 (11,638 ) State and political subdivisions 295,146 (906 ) 20,355 (150 ) 315,501 (1,056 ) Corporates 13,088 (14 ) 50,995 (187 ) 64,083 (201 ) Total temporarily-impaired debt securities available for sale $ 930,803 $ (3,425 ) $ 518,852 $ (9,623 ) $ 1,449,655 $ (13,048 ) December 31, 2015 Less than 12 months 12 months or more Total Description of Securities Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury $ 344,556 $ (576 ) $ — $ — $ 344,556 $ (576 ) U.S. Agencies 615,993 (1,032 ) — — 615,993 (1,032 ) Mortgage-backed 2,056,316 (21,013 ) 426,959 (17,076 ) 2,483,275 (38,089 ) State and political subdivisions 479,197 (1,316 ) 60,324 (779 ) 539,521 (2,095 ) Corporates 29,126 (183 ) 50,796 (480 ) 79,922 (663 ) Total temporarily-impaired debt securities available for sale $ 3,525,188 $ (24,120 ) $ 538,079 $ (18,335 ) $ 4,063,267 $ (42,455 ) The unrealized losses in the Company’s investments in U.S. treasury obligations, U.S. government agencies, Government Sponsored Entity (GSE) mortgage-backed securities, municipal securities, and corporates were caused by changes in interest rates. The Company does not have the intent to sell these securities and does not believe it is more likely than not that the Company will be required to sell these securities before a recovery of amortized cost. The Company expects to recover its cost basis in the securities and does not consider these investments to be other-than-temporarily impaired at March 31, 2016. Securities Held to Maturity The table below provides detailed information for securities held to maturity at March 31, 2016 and December 31, 2015 (in thousands): Net Amortized Unrealized Fair March 31, 2016 Cost Gains Value State and political subdivisions $ 804,652 $ 54,676 $ 859,328 December 31, 2015 State and political subdivisions $ 667,106 $ 24,273 $ 691,379 The following table presents contractual maturity information for securities held to maturity at March 31, 2016 (in thousands): Amortized Fair Cost Value Due in 1 year or less $ 15,971 $ 17,056 Due after 1 year through 5 years 75,674 80,816 Due after 5 years through 10 years 463,546 495,044 Due after 10 years 249,461 266,412 Total securities held to maturity $ 804,652 $ 859,328 Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. There were no sales of securities held to maturity during the first three months of 2016 or 2015. Trading Securities The net unrealized gains on trading securities at March 31, 2016 and March 31, 2015 were $48 thousand and $30 thousand, respectively, and were included in trading and investment banking income on the consolidated statements of income. Other Securities The table below provides detailed information for Federal Reserve Bank (FRB) stock and Federal Home Loan Bank (FHLB) stock and other securities at March 31, 2016 and December 31, 2015 (in thousands): Gross Gross Amortized Unrealized Unrealized Fair March 31, 2016 Cost Gains Losses Value FRB and FHLB stock $ 33,667 $ — $ — $ 33,667 Other securities – marketable 4 6,768 — 6,772 Other securities – non-marketable 23,226 927 (1 ) 24,152 Total Other securities $ 56,897 $ 7,695 $ (1 ) $ 64,591 December 31, 2015 FRB and FHLB stock $ 33,215 $ — $ — $ 33,215 Other securities – marketable 5 7,159 — 7,164 Other securities – non-marketable 23,855 964 — 24,819 Total Other securities $ 57,075 $ 8,123 $ — $ 65,198 Investment in FRB stock is based on the capital structure of the investing bank, and investment in FHLB stock is mainly tied to the level of borrowings from the FHLB. These holdings are carried at cost. Other marketable and non-marketable securities include Prairie Capital Management (PCM) alternative investments in hedge funds and private equity funds, which are accounted for as equity-method investments. The fair value of other marketable securities includes alternative investment securities of $6.8 million at March 31, 2016 and $7.2 million at December 31, 2015. The fair value of other non-marketable securities includes alternative investment securities of $2.1 million at March 31, 2016 and $2.0 million at December 31, 2015. Unrealized gains or losses on alternative investments are recognized in the Equity (loss) earnings on alternative investments line of the Company’s Consolidated Statements of Income.

Goodwill and Other Intangibles

Goodwill and Other Intangibles	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles	6. Goodwill and Other Intangibles Changes in the carrying amount of goodwill for the periods ended March 31, 2016 and December 31, 2015 by reportable segment are as follows (in thousands): Bank Institutional Asset Total Balances as of January 1, 2016 $ 161,341 $ 47,529 $ 19,476 $ 228,346 Acquisition of Marquette 50 — — 50 Balances as of March 31, 2016 $ 161,391 $ 47,529 $ 19,476 $ 228,396 Balances as of January 1, 2015 $ 142,753 $ 47,529 $ 19,476 $ 209,758 Acquisition of Marquette 18,588 — — 18,588 Balances as of December 31, 2015 $ 161,341 $ 47,529 $ 19,476 $ 228,346 Following are the finite-lived intangible assets that continue to be subject to amortization as of March 31, 2016 and December 31, 2015 (in thousands) As of March 31, 2016 Gross Carrying Accumulated Net Carrying Core deposit intangible assets $ 47,527 $ 36,433 $ 11,094 Customer relationships 107,460 75,902 31,558 Other intangible assets 4,198 3,294 904 Total intangible assets $ 159,185 $ 115,629 $ 43,556 As of December 31, 2015 Gross Carrying Accumulated Net Carrying Core deposit intangible assets $ 36,497 $ 33,613 $ 2,884 Core deposit intangible-Marquette acquisition 11,030 1,838 9,192 Customer relationships 104,560 73,496 31,064 Customer relationship-Marquette acquisition 2,900 338 2,562 Other intangible assets 3,247 2,841 406 Other intangible assets-Marquette acquisition 951 277 674 Total intangible assets $ 159,185 $ 112,403 $ 46,782 Following is the aggregate amortization expense recognized in each period (in thousands): Three Months Ended March 31, 2016 2015 Aggregate amortization expense $ 3,226 $2,755 Estimated amortization expense of intangible assets on future years (in thousands): For the nine months ending December 31, 2016 $ 9,064 For the year ending December 31, 2017 10,180 For the year ending December 31, 2018 7,202 For the year ending December 31, 2019 5,822 For the year ending December 31, 2020 4,487 For the year ending December 31, 2021 3,101

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	3 Months Ended
	Mar. 31, 2016
Banking and Thrift [Abstract]
Securities Sold Under Agreements to Repurchase	7. Securities Sold Under Agreements to Repurchase The Company utilizes repurchase agreements to facilitate the needs of customers and to facilitate secured short-term funding needs. Repurchase agreements are stated at the amount of cash received in connection with the transaction. The Company monitors collateral levels on a continuous basis and may be required to provide additional collateral based on the fair value of the underlying securities. Securities pledged as collateral under repurchase agreements are maintained with the Company’s safekeeping agents. The table below presents the remaining contractual maturities of repurchase agreements outstanding at March 31, 2016, in addition to the various types of marketable securities that have been pledged as collateral for these borrowings (in thousands). As of March 31, 2016 Remaining Contractual Maturities of the Agreements Overnight & Continuous Over 90 Days Total Repurchase agreements, secured by: U.S. Treasury $ 117,701 $ — $ 117,701 U.S. Agencies 1,496,723 3,100 1,499,823 Total repurchase agreements $ 1,614,424 $ 3,100 $ 1,617,524

Business Segment Reporting

Business Segment Reporting	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Business Segment Reporting	8. Business Segment Reporting The Company has strategically aligned its operations into the following three reportable segments (collectively, the Business Segments): Bank, Institutional Investment Management, and Asset Servicing. Senior executive officers regularly evaluate business segment financial results produced by the Company’s internal management reporting system in deciding how to allocate resources and assess performance for individual Business Segments. Previously, the Company had the following four Business Segments: Bank, Institutional Investment Management, Asset Servicing, and Payment Solutions. In the first quarter of 2016, the Company merged the Payments Solutions segment into the Bank segment to better reflect how the core businesses, products and services are being evaluated by management currently. The Company’s Payment Solutions leadership structure and financial performance assessments are now included in the Bank segment, and accordingly, the reportable segments were realigned to reflect these changes. For comparability purposes, amounts in all periods are based on methodologies in effect at March 31, 2016. Previously reported results have been reclassified to conform to the current organizational structure. The following summaries provide information about the activities of each segment: The Bank Institutional Investment Management Asset Servicing Business Segment Information Segment financial results were as follows (in thousands): Three Months Ended March 31, 2016 Bank Institutional Asset Total Net interest income $ 115,271 $ — $ 2,621 $ 117,892 Provision for loan losses 5,000 — — 5,000 Noninterest income 75,441 18,416 22,493 116,350 Noninterest expense 143,361 17,233 20,150 180,744 Income before taxes 42,351 1,183 4,964 48,498 Income tax expense 10,706 289 1,258 12,253 Net income $ 31,645 $ 894 $ 3,706 $ 36,245 Average assets $ 17,885,000 $ 63,000 $ 1,387,000 $ 19,335,000 Three Months Ended March 31, 2015 Bank Institutional Asset Total Net interest income $ 89,360 $ 1 $ 997 $ 90,358 Provision for loan losses 3,000 — — 3,000 Noninterest income 74,689 27,084 23,434 125,207 Noninterest expense 125,178 17,961 21,274 164,413 Income before taxes 35,871 9,124 3,157 48,152 Income tax expense 10,715 2,750 922 14,387 Net income $ 25,156 $ 6,374 $ 2,235 $ 33,765 Average assets $ 15,814,000 $ 75,000 $ 943,000 $ 16,832,000

Acquisition

Acquisition	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Acquisition	9. Acquisition On May 31, 2015, the Company acquired 100% of the outstanding common shares of Marquette Financial Companies. Marquette was a privately held financial services company with a portfolio of businesses and operated 13 branches in Arizona and Texas, two national commercial specialty-lending businesses focused on asset-based lending and accounts receivable factoring, as well as an asset-management firm. As a result of the acquisition, the Company increased its presence in Arizona and Texas and supplemented the Company’s commercial-banking services with factoring and asset-based lending businesses. As of the close of trading on the Acquisition Date, the beneficial owners of Marquette received 9.2295 shares of the Company’s common stock for each share of Marquette common stock owned at that date (approximately 3.47 million shares total). The market value of the shares of the Company’s common stock issued at the effective time of the merger was approximately $179.7 million, based on the closing stock price of the Company’s common stock of $51.79 on May 29, 2015. The transaction was accounted for using the purchased method of accounting in accordance with FASB ASC Topic 805, Business Combinations The following table summarizes the net assets acquired (at fair value) and consideration transferred for Marquette ( in thousands, except for per share data): Fair Value May 31, 2015 Assets Loans $ 980,404 Investment securities 177,694 Cash and due from banks 95,351 Premises and equipment, net 11,508 Identifiable intangible assets 14,881 Other assets 32,336 Total assets acquired 1,312,174 Liabilities Noninterest-bearing deposits 226,161 Interest-bearing deposits 708,675 Short-term debt 112,133 Long-term debt 89,971 Other liabilities 14,135 Total liabilities assumed 1,151,075 Net identifiable assets acquired 161,099 Goodwill acquired 18,638 Net assets acquired $ 179,737 Consideration: Company’s common shares issued 3,470 Purchase price per share of the Company’s common stock $ 51.79 Fair value of total consideration transferred $ 179,737 In the Marquette acquisition, the Company purchased $980.4 million of loans at fair value. All non-performing loans and select other classified loan relationships considered by management to be credit impaired are accounted for pursuant to ASC Topic 310-30, as previously discussed within Note 4, “Loans and Allowance for Loan Losses.” The Company assumed long-term debt obligations with an aggregate balance of $103.1 million and an aggregate fair value of $65.5 million as of the Acquisition Date payable to four unconsolidated trusts (Marquette Capital Trust I, Marquette Capital Trust II, Marquette Capital Trust III, and Marquette Capital Trust IV) that have issued trust preferred securities. Interest rates on trust preferred securities trusts are tied to the three-month LIBOR rate with spreads ranging from 133 basis points to 160 basis points and reset quarterly. The trust preferred securities have maturity dates ranging from January 2036 to September 2036. The amount of goodwill arising from the acquisition reflects the Company’s increased market share and related synergies that are expected to result from combining the operations of UMB and Marquette. All of the goodwill was assigned to the Bank segment. In accordance with ASC 350, Intangibles-Goodwill and Other The results of Marquette are included in the results of the Company subsequent to the Acquisition Date. For the three months ended March 31, 2016, acquisition expenses recognized in Noninterest expense in the Company’s Consolidated Statements of Income totaled $3.0 million. This total included $828 thousand of severance in Salaries and employee benefits and $1.6 million in Legal and consulting fees.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	10. Commitments, Contingencies and Guarantees In the normal course of business, the Company is party to financial instruments with off-balance-sheet risk in order to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit, commercial letters of credit, standby letters of credit, futures contracts, forward foreign exchange contracts and spot foreign exchange contracts. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated balance sheet. The contract or notional amount of those instruments reflects the extent of involvement the Company has in particular classes of financial instruments. Many of the commitments expire without being drawn upon, therefore, the total amount of these commitments does not necessarily represent the future cash requirements of the Company. The Company’s exposure to credit loss in the event of nonperformance by the counterparty to the financial instruments for commitments to extend credit, commercial letters of credit, and standby letters of credit is represented by the contract or notional amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. The following table summarizes the Company’s off-balance sheet financial instruments. Contract or Notional Amount (in thousands): March 31, December 31, 2016 2015 Commitments to extend credit for loans (excluding credit card loans) $ 6,392,371 $ 6,671,794 Commitments to extend credit under credit card loans 3,049,160 2,986,581 Commercial letters of credit 9,706 11,541 Standby letters of credit 352,526 360,468 Futures contracts 500 — Forward contracts 42,078 75,611 Spot foreign exchange contracts 2,084 10,391

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	11. Derivatives and Hedging Activities Risk Management Objective of Using Derivatives The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to certain fixed rate assets and liabilities. The Company also has interest rate derivatives that result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk of the Company’s assets or liabilities. The Company has entered into an offsetting position for each of these derivative instruments with a matching instrument from another financial institution in order to minimize its net risk exposure resulting from such transactions. Fair Values of Derivative Instruments on the Consolidated Balance Sheet The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2016 and December 31, 2015. The Company’s derivative asset and derivative liability are located within Other assets and Other liabilities, respectively, on the Company’s Consolidated Balance Sheets. This table provides a summary of the fair value of the Company’s derivative assets and liabilities as of March 31, 2016 and December 31, 2015 (in thousands) Asset Derivatives Liability Derivatives March 31, December 31, March 31, December 31, Fair value Interest Rate Products: Derivatives not designated as hedging instruments $ 18,882 $ 11,700 $ 19,455 $ 11,921 Derivatives designated as hedging instruments 605 603 4,671 337 Total $ 19,487 $ 12,303 $ 24,126 $ 12,258 Fair Value Hedges of Interest Rate Risk The Company is exposed to changes in the fair value of certain of its fixed rate assets and liabilities due to changes in the benchmark interest rate, LIBOR. Interest rate swaps designated as fair value hedges involve either making fixed rate payments to a counterparty in exchange for the Company receiving variable rate payments, or making variable rate payments to a counterparty in exchange for the Company receiving fixed rate payments, over the life of the agreements without the exchange of the underlying notional amount. As of March 31, 2016, the Company had two interest rate swaps with a notional amount of $16.0 million that were designated as fair value hedges of interest rate risk associated with the Company’s fixed rate loan assets and brokered time deposits. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in earnings. The Company includes the gain or loss on the hedged items in the same line item as the offsetting loss or gain on the related derivatives. Cash Flow Hedges of Interest Rate Risk The Company is exposed to changes in the fair value of certain of its variable-rate liabilities due to changes in the benchmark interest rate, LIBOR. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. As of March 31, 2016, the Company had two interest rate swaps with a notional amount of $51.5 million that were designated as cash flow hedges of interest rate risk associated with the Company’s variable rate subordinated debentures issued by Marquette Capital Trusts III and IV. For derivatives designated and that qualify as cash flow hedges, the effective portion of changes in fair value is recorded in accumulated other comprehensive income (AOCI) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the derivatives is recognized directly into earnings gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in earnings. During the three months ended March 31, 2016, the Company recognized net losses of $4.1 million in AOCI for the effective portion of the change in fair value of these cash flow hedges. During the three months ended March 31, 2016, the Company did not record any hedge ineffectiveness in earnings. Amounts reported in AOCI related to derivatives will be reclassified to Interest expense as interest payments are received or paid on the Company’s derivatives. The Company does not expect to reclassify any amounts from AOCI to Interest expense during the next 12 months as the Company’s derivatives are effective after December 2018. As of March 31, 2016, the Company is hedging its exposure to the variability in future cash flows for forecasted transactions over a maximum period of 20.5 years. Non-designated Hedges The remainder of the Company’s derivatives are not designated in qualifying hedging relationships. Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers which the Company implemented in 2010. The Company executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously offset by interest rate swaps that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. As of March 31, 2016, the Company had 40 interest rate swaps with an aggregate notional amount of $511.8 million related to this program. During the three months ended March 31, 2016 and 2015, the Company recognized net losses of $352 thousand and $106 thousand, respectively, related to changes in the fair value of these swaps. Effect of Derivative Instruments on the Consolidated Statements of Income and Consolidated Statements of Comprehensive Income This table provides a summary of the amount of gain or loss recognized in other noninterest expense in the Consolidated Statements of Income related to the Company’s derivative assets and liabilities as of March 31, 2016 and March 31, 2015 (in thousands) Amount of Gain (Loss) Recognized For the Three Months Ended March 31, 2016 2015 Interest Rate Products Derivatives not designated as hedging instruments $ (352 ) $ (106 ) Total $ (352 ) $ (106 ) Interest Rate Products Derivatives designated as hedging instruments Fair value adjustments on derivatives $ (193 ) $ (115 ) Fair value adjustments on hedged items 192 110 Total $ (1 ) $ (5 ) This table provides a summary of the amount of gain or loss recognized in AOCI in the Consolidated Statements of Comprehensive Income related to the Company’s derivative assets and liabilities as of March 31, 2016 and March 31, 2015 (in thousands) Amount of Loss Recognized in Other For the Three Months Ended March 31, Derivatives in Cash Flow Hedging Relationships 2016 2015 Interest rate products Derivatives designed as cash flow hedging instruments $ (4,140 ) $ — Total $ (4,140 ) $ — Credit-risk-related Contingent Features The Company has agreements with certain of its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. As of March 31, 2016 the termination value of derivatives in a net liability position, which includes accrued interest, related to these agreements was $24.6 million. The Company has minimum collateral posting thresholds with certain of its derivative counterparties and has not yet reached its minimum collateral posting threshold under these agreements. If the Company had breached any of these provisions at March 31, 2016, it could have been required to settle its obligations under the agreements at the termination value.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	12. Fair Value Measurements The following table presents information about the Company’s assets measured at fair value on a recurring basis as of March 31, 2016, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value. Fair values determined by Level 1 inputs utilize quoted prices in active markets for identical assets and liabilities that the Company has the ability to access. Fair values determined by Level 2 inputs utilize inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability, such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the hierarchy. In such cases, the fair value is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Assets and liabilities measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015 (in thousands): Fair Value Measurement As of March 31, 2016 Description March 31, Quoted Prices (Level 1) Significant Significant (Level 3) Assets U.S. Treasury $ 400 $ 400 $ $ — U.S. Agencies 2,077 — 2,077 — State and political subdivisions 6,294 — 6,294 — Trading - other 18,008 17,760 248 — Trading securities 26,779 18,160 8,619 — U.S. Treasury 354,261 354,261 — — U.S. Agencies 593,769 — 593,769 — Mortgage-backed 3,668,538 — 3,668,538 — State and political subdivisions 2,186,602 — 2,186,602 — Corporates 80,142 80,142 — — Available for sale securities 6,883,312 434,403 6,448,909 — Company-owned life insurance 31,137 — 31,137 — Bank-owned life insurance 204,736 — 204,736 — Derivatives 19,487 — 19,487 — Total $ 7,165,451 $ 452,563 $ 6,712,888 $ — Liabilities Deferred compensation $ 39,582 $ 39,582 $ — $ — Derivatives 24,126 — 24,126 — Total $ 63,708 $ 39,582 $ 24,126 $ — Fair Value Measurement as of December 31, 2015 Description December 31, Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Assets U.S. Treasury $ 400 $ 400 $ — $ — U.S. Agencies 1,309 — 1,309 — State and political subdivisions 10,200 — 10,200 — Trading - other 17,708 17,708 — — Trading securities 29,617 18,108 11,509 — U.S. Treasury 349,779 349,779 — — U.S. Agencies 666,389 — 666,389 — Mortgage-backed 3,572,446 — 3,572,446 — State and political subdivisions 2,138,413 — 2,138,413 — Corporates 79,922 79,922 — — Available for sale securities 6,806,949 429,701 6,377,248 — Company-owned life insurance 31,205 — 31,205 — Bank-owned life insurance 202,991 — 202,991 — Derivatives 12,303 — 12,303 — Total $ 7,083,065 $ 447,809 $ 6,635,256 $ — Liabilities Deferred compensation 32,937 $ 32,937 $ — $ — Contingent consideration liability 17,718 — — 17,718 Derivatives 12,258 — 12,258 — Total $ 62,913 $ 32,937 $ 12,258 $ 17,718 The following table reconciles the beginning and ending fair value of balances of the contingent consideration liability: Three Months Ended March 31, 2016 2015 Beginning Balance $ 17,718 $ 53,411 Payment of contingent considerations on acquisitions (17,784 ) (18,702 ) Fair value adjustments 66 (2,264 ) Ending Balance $ — $ 32,445 Valuation methods for instruments measured at fair value on a recurring basis The following methods and assumptions were used to estimate the fair value of each class of financial instruments measured on a recurring basis: Trading Securities Securities Available for Sale and Investment Securities Company-owned Life Insurance Bank-owned Life Insurance Derivatives Deferred Compensation Contingent Consideration Assets measured at fair value on a non-recurring basis as of March 31, 2016 and December 31, 2015 (in thousands): Fair Value Measurement at March 31, 2016 Using Description March 31, Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total Gains (Losses) Recognized During the March 31 Impaired loans $ 25,174 $ — $ — $ 25,174 $ 491 Other real estate owned 100 — — 100 — Total $ 25,274 $ — $ — $ 25,274 $ 491 Fair Value Measurement at December 31, 2015 Using Description December 31, Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total Gains (Losses) Recognized During the Impaired loans $ 22,885 $ — $ — $ 22,885 $ (3,957 ) Other real estate owned 3,269 — — 3,269 — Total $ 26,154 $ — $ — $ 26,154 $ (3,957 ) Valuation methods for instruments measured at fair value on a nonrecurring basis The following methods and assumptions were used to estimate the fair value of each class of financial instruments measured on a non-recurring basis: Impaired loans Other real estate owned Goodwill Fair value disclosures require disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The estimated fair value of the Company’s financial instruments at March, 31, 2016 and December 31, 2015 were as follows (in millions): Fair Value Measurement at March 31, 2016 Using Carrying Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total FINANCIAL ASSETS Cash and short-term investments $ 898.2 $ 733.6 $ 164.6 $ — $ 898.2 Securities available for sale 6,883.3 434.4 6,448.9 — 6,883.3 Securities held to maturity 804.7 — 859.3 — 859.3 Trading securities 26.8 18.2 8.6 — 26.8 Other securities 64.6 — 64.6 — 64.6 Loans (exclusive of allowance for loan loss) 9,704.5 — 9,779.7 — 9,779.7 Derivatives 19.5 — 19.5 — 19.5 FINANCIAL LIABILITIES Demand and savings deposits 14,380.7 14,380.7 — — 14,380.7 Time deposits 1,037.6 — 1,037.6 — 1,037.6 Other borrowings 1,686.7 64.2 1,622.5 — 1,686.7 Long-term debt 85.2 — 85.7 — 85.7 Derivatives 24.1 — 24.1 — 24.1 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 1.3 Commercial letters of credit 0.1 Standby letters of credit 0.6 Fair Value Measurement at December 31, 2015 Using Carrying Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total FINANCIAL ASSETS Cash and short-term investments $ 1,154.7 $ 997.0 $ 157.7 $ — $ 1,154.7 Securities available for sale 6,806.9 429.7 6,377.2 — 6,806.9 Securities held to maturity 667.1 — 691.4 — 691.4 Trading securities 29.6 18.1 11.5 — 29.6 Other securities 65.2 — 65.2 — 65.2 Loans (exclusive of allowance for loan loss) 9,431.3 — 9,452.1 — 9,452.1 Derivatives 12.3 — 12.3 — 12.3 FINANCIAL LIABILITIES Demand and savings deposits 13,836.9 13,836.9 — — 13,836.9 Time deposits 1,255.9 — 1,255.9 — 1,255.9 Other borrowings 1,823.1 66.9 1,756.2 — 1,823.1 Long-term debt 86.1 — 86.4 — 86.4 Derivatives 12.3 — 12.3 — 12.3 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 4.9 Commercial letters of credit 0.3 Standby letters of credit 2.6 Cash and short-term investments Securities held to maturity Other securities Loans Demand and savings deposits Time deposits Other borrowings Long-term debt Other off-balance sheet instruments

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Cash and cash equivalents	Cash and cash equivalents Cash and cash equivalents include Cash and due from banks and amounts due from the Federal Reserve Bank. Cash on hand, cash items in the process of collection, and amounts due from correspondent banks are included in Cash and due from banks. Amounts due from the Federal Reserve Bank are interest-bearing for all periods presented and are included in the Interest-bearing due from banks line on the Company’s Consolidated Balance Sheets. This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of March 31, 2016 and March 31, 2015 (in thousands) March 31, 2016 2015 Due from the Federal Reserve $ 273,672 $ 585,557 Cash and due from banks 325,446 449,315 Cash and cash equivalents at end of period $ 599,118 $ 1,034,872 Also included in the Interest-bearing due from banks line, but not considered cash and cash equivalents are interest-bearing accounts held at other financial institutions, which totaled $128.3 million and $180.8 million at March 31, 2016 and March 31, 2015, respectively.
Per Share Data	Per Share Data Basic income per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted income per share includes the dilutive effect of 333,799 and 436,823 shares of common stock issuable upon the exercise of outstanding stock options at March 31, 2016 and 2015, respectively. Options issued under employee benefit plans to purchase 660,802 and 498,488 shares of common stock were outstanding at March 31, 2016 and 2015, respectively, but were not included in the computation of diluted income per share because the options were anti-dilutive.

Summary of Significant Accoun22

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Cash and Cash Equivalents	This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of March 31, 2016 and March 31, 2015 (in thousands) March 31, 2016 2015 Due from the Federal Reserve $ 273,672 $ 585,557 Cash and due from banks 325,446 449,315 Cash and cash equivalents at end of period $ 599,118 $ 1,034,872

Loans and Allowance for Loan 23

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Schedule of Net Book Value for PCI Loans Accounted Under ASC 310-30	Below is the composition of the net book value for the PCI loans accounted for under ASC 310-30 at March 31, 2016 (in thousands) PCI Loans: At March 31, 2016 Contractual cash flows $ 3,302 Non-accretable difference (647 ) Accretable yield (118 ) Loans accounted for under ASC 310-30 $ 2,537
Summary of Loan Classes and Aging of Past Due Loans	This table provides a summary of loan classes and an aging of past due loans at March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 30-89 Greater Non- Accrual Total Due PCI Current Total Loans Loans Commercial: Commercial $ 20,035 $ 465 $ 39,371 $ 59,871 $ — $ 4,287,197 $ 4,347,068 Asset-based — — — — — 212,669 212,669 Factoring — — — — — 88,534 88,534 Commercial – credit card 333 20 25 378 — 145,653 146,031 Real estate: Real estate –construction 1,033 906 232 2,171 — 495,333 497,504 Real estate – commercial 4,234 — 8,403 12,637 1,023 2,753,573 2,767,233 Real estate – residential 2,326 — 836 3,162 — 482,560 485,722 Real estate – HELOC 1,737 — 3,094 4,831 — 719,472 724,303 Consumer: Consumer – credit card 2,085 1,780 360 4,225 — 266,333 270,558 Consumer – other 6,594 145 2,613 9,352 1,514 106,105 116,971 Leases 49 — — 49 — 42,989 43,038 Total loans $ 38,426 $ 3,316 $ 54,934 $ 96,676 $ 2,537 $ 9,600,418 $ 9,699,631 March 31, 2016 30-89 Greater Current Total Loans PCI Loans Commercial: Commercial $ — $ — $ — $ — Asset-based — — — — Factoring — — — — Commercial – credit card — — — — Real estate: Real estate – construction — — — — Real estate – commercial — 1,023 — 1,023 Real estate – residential — — — — Real estate – HELOC — — — — Consumer: Consumer – credit card — — — — Consumer – other 75 35 1,404 1,514 Leases — — — — Total PCI loans $ 75 $ 1,058 $ 1,404 $ 2,537 December 31, 2015 30-89 Greater Non- Accrual Total Due PCI Current Total Loans Loans Commercial: Commercial $ 5,821 $ 2,823 $ 43,841 $ 52,485 $ — $ 4,153,251 $ 4,205,736 Asset-based — — — — — 219,244 219,244 Factoring — — — — — 90,686 90,686 Commercial – credit card 614 24 13 651 — 124,710 125,361 Real estate: Real estate –construction 1,828 548 331 2,707 — 413,861 416,568 Real estate – commercial 2,125 1,630 9,578 13,333 1,055 2,648,384 2,662,772 Real estate – residential 612 35 800 1,447 — 490,780 492,227 Real estate – HELOC 129 — 3,524 3,653 — 726,310 729,963 Consumer: Consumer – credit card 2,256 2,089 468 4,813 — 286,757 291,570 Consumer – other 5,917 175 2,597 8,689 2,001 144,087 154,777 Leases — — — — — 41,857 41,857 Total loans $ 19,302 $ 7,324 $ 61,152 $ 87,778 $ 3,056 $ 9,339,927 $ 9,430,761 December 31, 2015 30-89 Greater Current Total Loans PCI Loans Commercial: Commercial $ — $ — $ — $ — Asset-based — — — — Factoring — — — — Commercial – credit card — — — — Real estate: Real estate – construction — — — — Real estate – commercial — 1,055 — 1,055 Real estate – residential — — — — Real estate – HELOC — — — — Consumer: Consumer – credit card — — — — Consumer – other 58 105 1,838 2,001 Leases — — — — Total PCI loans $ 58 $ 1,160 $ 1,838 $ 3,056
Credit Risk Profile by Risk Rating	Credit Exposure Credit Risk Profile by Risk Rating Originated and Non-PCI Loans Commercial Asset-based Factoring March 31, 2016 December 31, March 31, 2016 December 31, March 31, 2016 December 31, Non-watch list $ 3,968,381 $ 3,880,109 $ 179,027 $ 198,903 $ 88,089 $ 90,449 Watch 147,208 105,539 — — — — Special Mention 40,095 29,397 28,142 18,163 9 237 Substandard 191,384 190,691 5,500 2,178 436 — Total $ 4,347,068 $ 4,205,736 $ 212,669 $ 219,244 $ 88,534 $ 90,686 Real estate – construction Real estate – commercial March 31, 2016 December 31, March 31, 2016 December 31, Non-watch list $ 488,546 $ 415,258 $ 2,673,502 $ 2,561,401 Watch 4,346 370 37,764 51,774 Special Mention 3,835 — 19,426 22,544 Substandard 777 940 35,518 25,998 Total $ 497,504 $ 416,568 $ 2,766,210 $ 2,661,717 Credit Exposure Credit Risk Profile by Risk Rating PCI Loans Real estate – commercial March 31, 2016 December 31, Non-watch list $ — $ — Watch — — Special Mention — — Substandard 1,023 1,055 Total $ 1,023 $ 1,055
Credit Risk Profile Based on Payment Activity	Credit Exposure Credit Risk Profile Based on Payment Activity Originated and Non-PCI Loans Commercial – credit card Real estate – residential Real estate – HELOC March 31, 2016 December 31, March 31, 2016 December 31, March 31, 2016 December 31, Performing $ 146,006 $ 125,348 $ 484,886 $ 491,427 $ 721,209 $ 726,439 Non-performing 25 13 836 800 3,094 3,524 Total $ 146,031 $ 125,361 $ 485,722 $ 492,227 $ 724,303 $ 729,963 Consumer – credit card Consumer – other Leases March 31, 2016 December 31, March 31, 2016 December 31, March 31, 2016 December 31, Performing $ 270,198 $ 291,102 $ 114,358 $ 152,180 $ 43,038 $ 41,857 Non-performing 360 468 2,613 2,597 — — Total $ 270,558 $ 291,570 $ 116,971 $ 154,777 $ 43,038 $ 41,857 This table provides an analysis of the credit risk profile of each loan class accounted for under ASC 310-30 at March 31, 2016 and December 31, 2015 (in thousands): Credit Risk Profile Based on Payment Activity PCI Loans Consumer – other March 31, 2016 December 31, Performing $ 1,514 $ 2,001 Non-performing — — Total $ 1,514 $ 2,001
Rollforward of Allowance for Loan Losses by Portfolio Segment	This table provides a rollforward of the allowance for loan losses by portfolio segment for three months ended March 31, 2016 (in thousands): Three Months Ended March 31, 2016 Commercial Real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 63,847 $ 8,220 $ 8,949 $ 127 $ 81,143 Charge-offs (5,075 ) (1,445 ) (2,515 ) — (9,035 ) Recoveries 2,489 144 657 — 3,290 Provision 47 2,990 1,969 (6 ) 5,000 Ending balance $ 61,308 $ 9,909 $ 9,060 $ 121 $ 80,398 Ending balance: individually evaluated for impairment $ 4,163 $ 1,210 $ — $ — $ 5,373 Ending balance: collectively evaluated for impairment 57,145 8,699 9,060 121 75,025 Ending Balance: PCI Loans — — — — — Loans: Ending balance: loans $ 4,794,302 $ 4,474,762 $ 387,529 $ 43,038 $ 9,699,631 Ending balance: individually evaluated for impairment 67,486 6,278 2,612 — 76,376 Ending balance: collectively evaluated for impairment 4,726,816 4,467,461 383,403 43,038 9,620,718 Ending Balance: PCI Loans — 1,023 1,514 — 2,537 ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT IN LOANS This table provides a rollforward of the allowance for loan losses by portfolio segment for three months ended March 31, 2015 (in thousands): Three Months Ended March 31, 2015 Commercial Real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 55,349 $ 10,725 $ 9,921 $ 145 $ 76,140 Charge-offs (412 ) (32 ) (2,704 ) — (3,148 ) Recoveries 810 15 662 — 1,487 Provision (88 ) 1,204 1,901 (17 ) 3,000 Ending balance $ 55,659 $ 11,912 $ 9,780 $ 128 $ 77,479 Ending balance: individually evaluated for impairment $ 1,223 $ 2,925 $ — $ — $ 4,148 Ending balance: collectively evaluated for impairment 54,436 8,987 9,780 128 73,331 Loans: Ending balance: loans $ 3,938,523 $ 3,160,418 $ 360,550 $ 38,817 $ 7,498,308 Ending balance: individually evaluated for impairment 13,839 14,844 — — 28,683 Ending balance: collectively evaluated for impairment 3,924,684 3,145,574 360,550 38,817 7,469,625
Analysis of Impaired Loans	This table provides an analysis of impaired loans by class at March 31, 2016 and December 31, 2015 (in thousands): As of March 31, 2016 Unpaid Recorded Recorded Total Related Average Recorded Commercial: Commercial $ 72,511 $ 38,422 $ 29,064 $ 67,486 $ 4,163 $ 67,744 Asset-based — — — — — — Factoring — — — — — — Commercial – credit card — — — — — — Real estate: Real estate – construction 781 318 118 436 35 443 Real estate – commercial 7,098 3,375 1,365 4,740 1,175 5,453 Real estate – residential 961 899 — 899 — 919 Real estate – HELOC 231 203 — 203 — 198 Consumer: Consumer – credit card — — — — — — Consumer – other 2,594 2,594 — 2,594 — 2,584 Leases — — — — — — Total $ 84,176 $ 45,811 $ 30,547 $ 76,358 $ 5,373 $ 77,341 As of December 31, 2015 Unpaid Recorded Recorded Total Related Average Recorded Commercial: Commercial $ 72,739 $ 40,648 $ 27,356 $ 68,004 $ 5,668 $ 41,394 Asset-based — — — — — — Factoring — — — — — — Commercial – credit card — — — — — — Real estate: Real estate – construction 782 331 118 449 42 802 Real estate – commercial 7,117 4,891 1,275 6,166 154 7,768 Real estate – residential 1,054 939 — 939 — 1,433 Real estate – HELOC 214 193 — 193 — 162 Consumer: Consumer – credit card — — — — — — Consumer – other 2,574 2,574 — 2,574 — 1,795 Leases — — — — — — Total $ 84,480 $ 49,576 $ 28,749 $ 78,325 $ 5,864 $ 53,354
Summary of Loans Restructured by Class	This table provides a summary of loans restructured by class during the three months ended March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 Three Months Ended March 31, 2015 Number Pre- Modification Post- Modification Number Pre- Modification Post- Modification Troubled Debt Restructurings Commercial: Commercial 2 $ 12,056 $ 12,056 — $ — $ — Asset-based Factoring Commercial – credit card — — — — — — Real estate: Real estate – construction — — — — — — Real estate – commercial — — — — — — Real estate – residential — — — — — — Real estate – HELOC — — — — — — Consumer: Consumer – credit card — — — — — — Consumer – other — — — — — — Leases — — — — — — Total 2 $ 12,056 $ 12,056 — $ — $ —

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2016
Securities Available for Sale	This table provides detailed information about securities available for sale at March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 Amortized Gross Gross Fair Value U.S. Treasury $ 353,828 $ 442 $ (9 ) $ 354,261 U.S. Agencies 593,489 424 (144 ) 593,769 Mortgage-backed 3,645,006 35,170 (11,638 ) 3,668,538 State and political subdivisions 2,154,346 33,312 (1,056 ) 2,186,602 Corporates 80,313 30 (201 ) 80,142 Total $ 6,826,982 $ 69,378 $ (13,048 ) $ 6,883,312 Gross Gross Amortized Unrealized Unrealized Fair December 31, 2015 Cost Gains Losses Value U.S. Treasury $ 350,354 $ 1 $ (576 ) $ 349,779 U.S. Agencies 667,414 7 (1,032 ) 666,389 Mortgage-backed 3,598,115 12,420 (38,089 ) 3,572,446 State and political subdivisions 2,116,543 23,965 (2,095 ) 2,138,413 Corporates 80,585 — (663 ) 79,922 Total $ 6,813,011 $ 36,393 $ (42,455 ) $ 6,806,949
Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale	The following table shows the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2016 and December 31, 2015 (in thousands). March 31, 2016 Less than 12 months 12 months or more Total Description of Securities Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury $ 14,962 $ (9 ) $ — $ — $ 14,962 $ (9 ) U.S. Agencies 170,523 (144 ) — — 170,523 (144 ) Mortgage-backed 437,084 (2,352 ) 447,502 (9,286 ) 884,586 (11,638 ) State and political subdivisions 295,146 (906 ) 20,355 (150 ) 315,501 (1,056 ) Corporates 13,088 (14 ) 50,995 (187 ) 64,083 (201 ) Total temporarily-impaired debt securities available for sale $ 930,803 $ (3,425 ) $ 518,852 $ (9,623 ) $ 1,449,655 $ (13,048 ) December 31, 2015 Less than 12 months 12 months or more Total Description of Securities Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury $ 344,556 $ (576 ) $ — $ — $ 344,556 $ (576 ) U.S. Agencies 615,993 (1,032 ) — — 615,993 (1,032 ) Mortgage-backed 2,056,316 (21,013 ) 426,959 (17,076 ) 2,483,275 (38,089 ) State and political subdivisions 479,197 (1,316 ) 60,324 (779 ) 539,521 (2,095 ) Corporates 29,126 (183 ) 50,796 (480 ) 79,922 (663 ) Total temporarily-impaired debt securities available for sale $ 3,525,188 $ (24,120 ) $ 538,079 $ (18,335 ) $ 4,063,267 $ (42,455 )
Securities Held to Maturity	The table below provides detailed information for securities held to maturity at March 31, 2016 and December 31, 2015 (in thousands): Net Amortized Unrealized Fair March 31, 2016 Cost Gains Value State and political subdivisions $ 804,652 $ 54,676 $ 859,328 December 31, 2015 State and political subdivisions $ 667,106 $ 24,273 $ 691,379
Schedule of Federal Reserve Bank Stock and Federal Home Loan Bank Stock and Other Securities	The table below provides detailed information for Federal Reserve Bank (FRB) stock and Federal Home Loan Bank (FHLB) stock and other securities at March 31, 2016 and December 31, 2015 (in thousands): Gross Gross Amortized Unrealized Unrealized Fair March 31, 2016 Cost Gains Losses Value FRB and FHLB stock $ 33,667 $ — $ — $ 33,667 Other securities – marketable 4 6,768 — 6,772 Other securities – non-marketable 23,226 927 (1 ) 24,152 Total Other securities $ 56,897 $ 7,695 $ (1 ) $ 64,591 December 31, 2015 FRB and FHLB stock $ 33,215 $ — $ — $ 33,215 Other securities – marketable 5 7,159 — 7,164 Other securities – non-marketable 23,855 964 — 24,819 Total Other securities $ 57,075 $ 8,123 $ — $ 65,198
Available-for-sale Securities [Member]
Contractual Maturity Information	The following table presents contractual maturity information for securities available for sale at March 31, 2016 (in thousands): Amortized Fair Cost Value Due in 1 year or less $ 1,056,562 $ 1,057,412 Due after 1 year through 5 years 1,162,717 1,176,382 Due after 5 years through 10 years 849,567 866,783 Due after 10 years 113,130 114,197 Total 3,181,976 3,214,774 Mortgage-backed securities 3,645,006 3,668,538 Total securities available for sale $ 6,826,982 $ 6,883,312
Held-to-maturity Securities [Member]
Contractual Maturity Information	The following table presents contractual maturity information for securities held to maturity at March 31, 2016 (in thousands): Amortized Fair Cost Value Due in 1 year or less $ 15,971 $ 17,056 Due after 1 year through 5 years 75,674 80,816 Due after 5 years through 10 years 463,546 495,044 Due after 10 years 249,461 266,412 Total securities held to maturity $ 804,652 $ 859,328

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	Changes in the carrying amount of goodwill for the periods ended March 31, 2016 and December 31, 2015 by reportable segment are as follows (in thousands): Bank Institutional Asset Total Balances as of January 1, 2016 $ 161,341 $ 47,529 $ 19,476 $ 228,346 Acquisition of Marquette 50 — — 50 Balances as of March 31, 2016 $ 161,391 $ 47,529 $ 19,476 $ 228,396 Balances as of January 1, 2015 $ 142,753 $ 47,529 $ 19,476 $ 209,758 Acquisition of Marquette 18,588 — — 18,588 Balances as of December 31, 2015 $ 161,341 $ 47,529 $ 19,476 $ 228,346
Changes in Intangible Assets	Following are the finite-lived intangible assets that continue to be subject to amortization as of March 31, 2016 and December 31, 2015 (in thousands) As of March 31, 2016 Gross Carrying Accumulated Net Carrying Core deposit intangible assets $ 47,527 $ 36,433 $ 11,094 Customer relationships 107,460 75,902 31,558 Other intangible assets 4,198 3,294 904 Total intangible assets $ 159,185 $ 115,629 $ 43,556 As of December 31, 2015 Gross Carrying Accumulated Net Carrying Core deposit intangible assets $ 36,497 $ 33,613 $ 2,884 Core deposit intangible-Marquette acquisition 11,030 1,838 9,192 Customer relationships 104,560 73,496 31,064 Customer relationship-Marquette acquisition 2,900 338 2,562 Other intangible assets 3,247 2,841 406 Other intangible assets-Marquette acquisition 951 277 674 Total intangible assets $ 159,185 $ 112,403 $ 46,782
Aggregate Amortization Expense Recognized	Following is the aggregate amortization expense recognized in each period (in thousands): Three Months Ended March 31, 2016 2015 Aggregate amortization expense $ 3,226 $2,755
Estimated Amortization Expense of Intangible Assets	Estimated amortization expense of intangible assets on future years (in thousands): For the nine months ending December 31, 2016 $ 9,064 For the year ending December 31, 2017 10,180 For the year ending December 31, 2018 7,202 For the year ending December 31, 2019 5,822 For the year ending December 31, 2020 4,487 For the year ending December 31, 2021 3,101

Securities Sold Under Agreeme26

Securities Sold Under Agreements to Repurchase (Tables)	3 Months Ended
	Mar. 31, 2016
Repurchase Agreements
Remaining Contractual Maturities Of Repurchase Agreements	The table below presents the remaining contractual maturities of repurchase agreements outstanding at March 31, 2016, in addition to the various types of marketable securities that have been pledged as collateral for these borrowings (in thousands). As of March 31, 2016 Remaining Contractual Maturities of the Agreements Overnight & Continuous Over 90 Days Total Repurchase agreements, secured by: U.S. Treasury $ 117,701 $ — $ 117,701 U.S. Agencies 1,496,723 3,100 1,499,823 Total repurchase agreements $ 1,614,424 $ 3,100 $ 1,617,524

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Segment Financial Results	Segment financial results were as follows (in thousands): Three Months Ended March 31, 2016 Bank Institutional Asset Total Net interest income $ 115,271 $ — $ 2,621 $ 117,892 Provision for loan losses 5,000 — — 5,000 Noninterest income 75,441 18,416 22,493 116,350 Noninterest expense 143,361 17,233 20,150 180,744 Income before taxes 42,351 1,183 4,964 48,498 Income tax expense 10,706 289 1,258 12,253 Net income $ 31,645 $ 894 $ 3,706 $ 36,245 Average assets $ 17,885,000 $ 63,000 $ 1,387,000 $ 19,335,000 Three Months Ended March 31, 2015 Bank Institutional Asset Total Net interest income $ 89,360 $ 1 $ 997 $ 90,358 Provision for loan losses 3,000 — — 3,000 Noninterest income 74,689 27,084 23,434 125,207 Noninterest expense 125,178 17,961 21,274 164,413 Income before taxes 35,871 9,124 3,157 48,152 Income tax expense 10,715 2,750 922 14,387 Net income $ 25,156 $ 6,374 $ 2,235 $ 33,765 Average assets $ 15,814,000 $ 75,000 $ 943,000 $ 16,832,000

Acquisition (Tables)

Acquisition (Tables)	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Summary of Net Assets Acquired (at Fair Value) and Consideration Transferred	The following table summarizes the net assets acquired (at fair value) and consideration transferred for Marquette ( in thousands, except for per share data): Fair Value May 31, 2015 Assets Loans $ 980,404 Investment securities 177,694 Cash and due from banks 95,351 Premises and equipment, net 11,508 Identifiable intangible assets 14,881 Other assets 32,336 Total assets acquired 1,312,174 Liabilities Noninterest-bearing deposits 226,161 Interest-bearing deposits 708,675 Short-term debt 112,133 Long-term debt 89,971 Other liabilities 14,135 Total liabilities assumed 1,151,075 Net identifiable assets acquired 161,099 Goodwill acquired 18,638 Net assets acquired $ 179,737 Consideration: Company’s common shares issued 3,470 Purchase price per share of the Company’s common stock $ 51.79 Fair value of total consideration transferred $ 179,737

Commitments, Contingencies an29

Commitments, Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Notional Amount of Off-Balance Sheet Financial Instruments	The following table summarizes the Company’s off-balance sheet financial instruments. Contract or Notional Amount (in thousands): March 31, December 31, 2016 2015 Commitments to extend credit for loans (excluding credit card loans) $ 6,392,371 $ 6,671,794 Commitments to extend credit under credit card loans 3,049,160 2,986,581 Commercial letters of credit 9,706 11,541 Standby letters of credit 352,526 360,468 Futures contracts 500 — Forward contracts 42,078 75,611 Spot foreign exchange contracts 2,084 10,391

Derivatives and Hedging Activ30

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Fair Value of Derivative Assets and Liabilities	This table provides a summary of the fair value of the Company’s derivative assets and liabilities as of March 31, 2016 and December 31, 2015 (in thousands) Asset Derivatives Liability Derivatives March 31, December 31, March 31, December 31, Fair value Interest Rate Products: Derivatives not designated as hedging instruments $ 18,882 $ 11,700 $ 19,455 $ 11,921 Derivatives designated as hedging instruments 605 603 4,671 337 Total $ 19,487 $ 12,303 $ 24,126 $ 12,258
Summary of Amount of Gain or Loss Recognized in Other Non-Interest Expense in Consolidated Statements of Income Related to Derivative Assets and Liabilities	This table provides a summary of the amount of gain or loss recognized in other noninterest expense in the Consolidated Statements of Income related to the Company’s derivative assets and liabilities as of March 31, 2016 and March 31, 2015 (in thousands) Amount of Gain (Loss) Recognized For the Three Months Ended March 31, 2016 2015 Interest Rate Products Derivatives not designated as hedging instruments $ (352 ) $ (106 ) Total $ (352 ) $ (106 ) Interest Rate Products Derivatives designated as hedging instruments Fair value adjustments on derivatives $ (193 ) $ (115 ) Fair value adjustments on hedged items 192 110 Total $ (1 ) $ (5 )
Summary of Amount of Gain or Loss Recognized in AOCI in Consolidated Statements of Comprehensive Income Related to Company's Derivative Assets and Liabilities	This table provides a summary of the amount of gain or loss recognized in AOCI in the Consolidated Statements of Comprehensive Income related to the Company’s derivative assets and liabilities as of March 31, 2016 and March 31, 2015 (in thousands) Amount of Loss Recognized in Other For the Three Months Ended March 31, Derivatives in Cash Flow Hedging Relationships 2016 2015 Interest rate products Derivatives designed as cash flow hedging instruments $ (4,140 ) $ — Total $ (4,140 ) $ —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015 (in thousands): Fair Value Measurement As of March 31, 2016 Description March 31, Quoted Prices (Level 1) Significant Significant (Level 3) Assets U.S. Treasury $ 400 $ 400 $ $ — U.S. Agencies 2,077 — 2,077 — State and political subdivisions 6,294 — 6,294 — Trading - other 18,008 17,760 248 — Trading securities 26,779 18,160 8,619 — U.S. Treasury 354,261 354,261 — — U.S. Agencies 593,769 — 593,769 — Mortgage-backed 3,668,538 — 3,668,538 — State and political subdivisions 2,186,602 — 2,186,602 — Corporates 80,142 80,142 — — Available for sale securities 6,883,312 434,403 6,448,909 — Company-owned life insurance 31,137 — 31,137 — Bank-owned life insurance 204,736 — 204,736 — Derivatives 19,487 — 19,487 — Total $ 7,165,451 $ 452,563 $ 6,712,888 $ — Liabilities Deferred compensation $ 39,582 $ 39,582 $ — $ — Derivatives 24,126 — 24,126 — Total $ 63,708 $ 39,582 $ 24,126 $ — Fair Value Measurement as of December 31, 2015 Description December 31, Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Assets U.S. Treasury $ 400 $ 400 $ — $ — U.S. Agencies 1,309 — 1,309 — State and political subdivisions 10,200 — 10,200 — Trading - other 17,708 17,708 — — Trading securities 29,617 18,108 11,509 — U.S. Treasury 349,779 349,779 — — U.S. Agencies 666,389 — 666,389 — Mortgage-backed 3,572,446 — 3,572,446 — State and political subdivisions 2,138,413 — 2,138,413 — Corporates 79,922 79,922 — — Available for sale securities 6,806,949 429,701 6,377,248 — Company-owned life insurance 31,205 — 31,205 — Bank-owned life insurance 202,991 — 202,991 — Derivatives 12,303 — 12,303 — Total $ 7,083,065 $ 447,809 $ 6,635,256 $ — Liabilities Deferred compensation 32,937 $ 32,937 $ — $ — Contingent consideration liability 17,718 — — 17,718 Derivatives 12,258 — 12,258 — Total $ 62,913 $ 32,937 $ 12,258 $ 17,718
Reconciliation of Beginning and Ending Fair Value of Balances of Contingent Consideration Liability	The following table reconciles the beginning and ending fair value of balances of the contingent consideration liability: Three Months Ended March 31, 2016 2015 Beginning Balance $ 17,718 $ 53,411 Payment of contingent considerations on acquisitions (17,784 ) (18,702 ) Fair value adjustments 66 (2,264 ) Ending Balance $ — $ 32,445
Assets Measured at Fair Value on Non-Recurring Basis	Assets measured at fair value on a non-recurring basis as of March 31, 2016 and December 31, 2015 (in thousands): Fair Value Measurement at March 31, 2016 Using Description March 31, Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total Gains (Losses) Recognized During the March 31 Impaired loans $ 25,174 $ — $ — $ 25,174 $ 491 Other real estate owned 100 — — 100 — Total $ 25,274 $ — $ — $ 25,274 $ 491 Fair Value Measurement at December 31, 2015 Using Description December 31, Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total Gains (Losses) Recognized During the Impaired loans $ 22,885 $ — $ — $ 22,885 $ (3,957 ) Other real estate owned 3,269 — — 3,269 — Total $ 26,154 $ — $ — $ 26,154 $ (3,957 )
Estimated Fair Value of Financial Instruments	The estimated fair value of the Company’s financial instruments at March, 31, 2016 and December 31, 2015 were as follows (in millions): Fair Value Measurement at March 31, 2016 Using Carrying Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total FINANCIAL ASSETS Cash and short-term investments $ 898.2 $ 733.6 $ 164.6 $ — $ 898.2 Securities available for sale 6,883.3 434.4 6,448.9 — 6,883.3 Securities held to maturity 804.7 — 859.3 — 859.3 Trading securities 26.8 18.2 8.6 — 26.8 Other securities 64.6 — 64.6 — 64.6 Loans (exclusive of allowance for loan loss) 9,704.5 — 9,779.7 — 9,779.7 Derivatives 19.5 — 19.5 — 19.5 FINANCIAL LIABILITIES Demand and savings deposits 14,380.7 14,380.7 — — 14,380.7 Time deposits 1,037.6 — 1,037.6 — 1,037.6 Other borrowings 1,686.7 64.2 1,622.5 — 1,686.7 Long-term debt 85.2 — 85.7 — 85.7 Derivatives 24.1 — 24.1 — 24.1 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 1.3 Commercial letters of credit 0.1 Standby letters of credit 0.6 Fair Value Measurement at December 31, 2015 Using Carrying Quoted Prices (Level 1) Significant (Level 2) Significant (Level 3) Total FINANCIAL ASSETS Cash and short-term investments $ 1,154.7 $ 997.0 $ 157.7 $ — $ 1,154.7 Securities available for sale 6,806.9 429.7 6,377.2 — 6,806.9 Securities held to maturity 667.1 — 691.4 — 691.4 Trading securities 29.6 18.1 11.5 — 29.6 Other securities 65.2 — 65.2 — 65.2 Loans (exclusive of allowance for loan loss) 9,431.3 — 9,452.1 — 9,452.1 Derivatives 12.3 — 12.3 — 12.3 FINANCIAL LIABILITIES Demand and savings deposits 13,836.9 13,836.9 — — 13,836.9 Time deposits 1,255.9 — 1,255.9 — 1,255.9 Other borrowings 1,823.1 66.9 1,756.2 — 1,823.1 Long-term debt 86.1 — 86.4 — 86.4 Derivatives 12.3 — 12.3 — 12.3 OFF-BALANCE SHEET ARRANGEMENTS Commitments to extend credit for loans 4.9 Commercial letters of credit 0.3 Standby letters of credit 2.6

Summary of Cash and Cash Equiva

Summary of Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Due from the Federal Reserve	$ 273,672		$ 585,557
Cash and due from banks	325,446	$ 458,217	449,315
Cash and cash equivalents at end of period	$ 599,118	$ 819,112	$ 1,034,872	$ 1,787,230

Summary of Significant Accoun33

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Interest bearing amounts held at other financial institutions	$ 128.3	$ 180.8
Dilutive effect of common stock issuable upon exercise of outstanding options and nonvested restricted shares	333,799	436,823
Anti-dilutive shares	660,802	498,488

Loans and Allowance for Loan 34

Loans and Allowance for Loan Losses - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	May. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying amount of loans	$ 2,537,000		$ 3,056,000
Proceeds from sales of loans held for sale	10,303,000	$ 23,411,000
Non- Accrual Loans	54,934,000		61,152,000
Loans modified as troubled debt restructurings	46,000,000		36,600,000
Total Past Due	96,676,000		87,778,000
Commitments to lend to borrowers with loan modifications classified as TDR's	823,000	221,000
Default payment of troubled restructuring, commercial real estate loan		$ 178,000
Greater than 90 days Past Due and Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	3,316,000		7,324,000
PCI loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans modified as troubled debt restructurings	0
PCI loans | Greater than 90 days Past Due and Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,058,000		$ 1,160,000
Loans Accounted for under ASC 310-30 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying amount of loans	2,500,000
Outstanding balance of loans	3,300,000
Marquette [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans purchased at fair value				$ 980,400,000
Marquette [Member] | Non-PCI loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans purchased at fair value				972,600,000
Contractually required principal and interest at acquisition	983,900,000
Marquette [Member] | PCI loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans purchased at fair value				$ 7,800,000
Contractually required principal and interest at acquisition	9,300,000
Marquette [Member] | Loans Accounted for under ASC 310-30 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Carrying amount of loans	2,537,000
Outstanding balance of loans	$ 3,302,000
Revolving Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of days past due to consider loan as a loss and charged off	90 days
Closed-End Retail Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of days past due to consider loan as a loss and charged off	120 days
Open-End Retail Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of days past due to consider loan as a loss and charged off	180 days

Schedule of Net Book Value for

Schedule of Net Book Value for PCI Loans Accounted Under ASC 310-30 (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Loans accounted for under ASC 310-30	$ 2,537	$ 3,056
Loans Accounted for under ASC 310-30 [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractual cash flows	3,300
Loans accounted for under ASC 310-30	2,500
Marquette [Member] | Loans Accounted for under ASC 310-30 [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractual cash flows	3,302
Non-accretable difference	(647)
Accretable yield	(118)
Loans accounted for under ASC 310-30	$ 2,537

Summary of Loan Classes and Agi

Summary of Loan Classes and Aging of Past Due Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	$ 54,934	$ 61,152
Total Past Due	96,676	87,778
PCI Loans	2,537	3,056
Current	9,600,418	9,339,927
Total Loans	9,699,631	9,430,761	$ 7,498,308
Real estate - residential [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	836	800
Total Past Due	3,162	1,447
Current	482,560	490,780
Total Loans	485,722	492,227
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI Loans	1,514
Total Loans	387,529		360,550
Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	49
Current	42,989	41,857
Total Loans	43,038	41,857	$ 38,817
30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	38,426	19,302
30-89 Days Past Due [Member] | Real estate - residential [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,326	612
30-89 Days Past Due [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	49
Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	3,316	7,324
Greater than 90 days Past Due and Accruing [Member] | Real estate - residential [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		35
PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,404	1,838
PCI loans | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	75	58
PCI loans | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,058	1,160
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	39,371	43,841
Total Past Due	59,871	52,485
Current	4,287,197	4,153,251
Total Loans	4,347,068	4,205,736
Commercial [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	20,035	5,821
Commercial [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	465	2,823
Commercial - credit card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	25	13
Total Past Due	378	651
Current	145,653	124,710
Total Loans	146,031	125,361
Commercial - credit card [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	333	614
Commercial - credit card [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	20	24
Construction [Member] | Real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	232	331
Total Past Due	2,171	2,707
Current	495,333	413,861
Total Loans	497,504	416,568
Construction [Member] | 30-89 Days Past Due [Member] | Real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,033	1,828
Construction [Member] | Greater than 90 days Past Due and Accruing [Member] | Real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	906	548
Real estate - commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	8,403	9,578
Total Past Due	12,637	13,333
PCI Loans	1,023	1,055
Current	2,753,573	2,648,384
Total Loans	2,767,233	2,662,772
Real estate - commercial [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	4,234	2,125
Real estate - commercial [Member] | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due		1,630
Real estate - commercial [Member] | PCI loans | Greater than 90 days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,023	1,055
Real estate - HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	3,094	3,524
Total Past Due	4,831	3,653
Current	719,472	726,310
Total Loans	724,303	729,963
Real estate - HELOC [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,737	129
Credit card [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	360	468
Total Past Due	4,225	4,813
Current	266,333	286,757
Total Loans	270,558	291,570
Credit card [Member] | 30-89 Days Past Due [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	2,085	2,256
Credit card [Member] | Greater than 90 days Past Due and Accruing [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	1,780	2,089
Other [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- Accrual Loans	2,613	2,597
Total Past Due	9,352	8,689
PCI Loans	1,514	2,001
Current	106,105	144,087
Total Loans	116,971	154,777
Other [Member] | 30-89 Days Past Due [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	6,594	5,917
Other [Member] | Greater than 90 days Past Due and Accruing [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	145	175
Other [Member] | PCI loans | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,404	1,838
Other [Member] | PCI loans | 30-89 Days Past Due [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	75	58
Other [Member] | PCI loans | Greater than 90 days Past Due and Accruing [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	35	105
Asset-based [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	212,669	219,244
Total Loans	212,669	219,244
Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	88,534	90,686
Total Loans	$ 88,534	$ 90,686

Credit Risk Profile by Risk Rat

Credit Risk Profile by Risk Rating - Originated and Non-PCI Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	$ 9,699,631	$ 9,430,761	$ 7,498,308
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	4,347,068	4,205,736
Commercial [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	4,347,068	4,205,736
Commercial [Member] | Non-watch list [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	3,968,381	3,880,109
Commercial [Member] | Watch [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	147,208	105,539
Commercial [Member] | Special Mention [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	40,095	29,397
Commercial [Member] | Substandard [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	191,384	190,691
Asset-based [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	212,669	219,244
Asset-based [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	212,669	219,244
Asset-based [Member] | Non-watch list [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	179,027	198,903
Asset-based [Member] | Special Mention [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	28,142	18,163
Asset-based [Member] | Substandard [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	5,500	2,178
Factoring [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	88,534	90,686
Factoring [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	88,534	90,686
Factoring [Member] | Non-watch list [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	88,089	90,449
Factoring [Member] | Special Mention [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	9	237
Factoring [Member] | Substandard [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	436
Real estate - construction [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	497,504	416,568
Real estate - construction [Member] | Non-watch list [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	488,546	415,258
Real estate - construction [Member] | Watch [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	4,346	370
Real estate - construction [Member] | Special Mention [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	3,835
Real estate - construction [Member] | Substandard [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	777	940
Real estate - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	2,767,233	2,662,772
Real estate - commercial [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	2,766,210	2,661,717
Real estate - commercial [Member] | Non-watch list [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	2,673,502	2,561,401
Real estate - commercial [Member] | Watch [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	37,764	51,774
Real estate - commercial [Member] | Special Mention [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	19,426	22,544
Real estate - commercial [Member] | Substandard [Member] | Originated and Non-PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	$ 35,518	$ 25,998

Credit Risk Profile Based on Pa

Credit Risk Profile Based on Payment Activity - Originated and Non-PCI Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	$ 9,699,631	$ 9,430,761	$ 7,498,308
Real estate - residential [Member] | Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	485,722	492,227
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	387,529		360,550
Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	43,038	41,857	$ 38,817
Commercial - credit card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	146,031	125,361
Real estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	724,303	729,963
Credit card [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	270,558	291,570
Other [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	116,971	154,777
Originated and Non-PCI Loans [Member] | Real estate - residential [Member] | Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	485,722	492,227
Originated and Non-PCI Loans [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	43,038	41,857
Originated and Non-PCI Loans [Member] | Commercial - credit card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	146,031	125,361
Originated and Non-PCI Loans [Member] | Real estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	724,303	729,963
Originated and Non-PCI Loans [Member] | Credit card [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	270,558	291,570
Originated and Non-PCI Loans [Member] | Other [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	116,971	154,777
Originated and Non-PCI Loans [Member] | Performing [Member] | Real estate - residential [Member] | Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	484,886	491,427
Originated and Non-PCI Loans [Member] | Performing [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	43,038	41,857
Originated and Non-PCI Loans [Member] | Performing [Member] | Commercial - credit card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	146,006	125,348
Originated and Non-PCI Loans [Member] | Performing [Member] | Real estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	721,209	726,439
Originated and Non-PCI Loans [Member] | Performing [Member] | Credit card [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	270,198	291,102
Originated and Non-PCI Loans [Member] | Performing [Member] | Other [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	114,358	152,180
Originated and Non-PCI Loans [Member] | Non-performing [Member] | Real estate - residential [Member] | Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	836	800
Originated and Non-PCI Loans [Member] | Non-performing [Member] | Commercial - credit card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	25	13
Originated and Non-PCI Loans [Member] | Non-performing [Member] | Real estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	3,094	3,524
Originated and Non-PCI Loans [Member] | Non-performing [Member] | Credit card [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	360	468
Originated and Non-PCI Loans [Member] | Non-performing [Member] | Other [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	$ 2,613	$ 2,597

Credit Risk Profile by Risk R39

Credit Risk Profile by Risk Rating - Loans Accounted for under ASC 310-30 (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	$ 9,699,631	$ 9,430,761	$ 7,498,308
Real estate - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	2,767,233	2,662,772
Real estate - commercial [Member] | Loans Accounted for under ASC 310-30 [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	1,023	1,055
Real estate - commercial [Member] | Substandard [Member] | Loans Accounted for under ASC 310-30 [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile by Risk Rating	$ 1,023	$ 1,055

Credit Risk Profile Based on 40

Credit Risk Profile Based on Payment Activity - Loans Accounted for under ASC 310-30 (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	$ 9,699,631	$ 9,430,761	$ 7,498,308
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	387,529		$ 360,550
Other [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	116,971	154,777
Other [Member] | Consumer [Member] | Loans Accounted for under ASC 310-30 [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	1,514	2,001
Other [Member] | Performing [Member] | Consumer [Member] | Loans Accounted for under ASC 310-30 [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit Risk Profile Based on Payment Activity	$ 1,514	$ 2,001

Rollforward of Allowance for Lo

Rollforward of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 81,143	$ 76,140
Charge-offs	(9,035)	(3,148)
Recoveries	3,290	1,487
Provision	5,000	3,000
Ending balance	80,398	77,479
Ending balance: individually evaluated for impairment	5,373	4,148	$ 5,864
Ending balance: collectively evaluated for impairment	75,025	73,331
Ending Balance: PCI Loans	0
Total Loans	9,699,631	7,498,308	9,430,761
Ending balance: individually evaluated for impairment	76,376	28,683
Ending balance: collectively evaluated for impairment	9,620,718	7,469,625
Ending Balance: PCI Loans	2,537		3,056
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	63,847	55,349
Charge-offs	(5,075)	(412)
Recoveries	2,489	810
Provision	47	(88)
Ending balance	61,308	55,659
Ending balance: individually evaluated for impairment	4,163	1,223
Ending balance: collectively evaluated for impairment	57,145	54,436
Ending Balance: PCI Loans	0
Total Loans	4,794,302	3,938,523
Ending balance: individually evaluated for impairment	67,486	13,839
Ending balance: collectively evaluated for impairment	4,726,816	3,924,684
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	8,220	10,725
Charge-offs	(1,445)	(32)
Recoveries	144	15
Provision	2,990	1,204
Ending balance	9,909	11,912
Ending balance: individually evaluated for impairment	1,210	2,925
Ending balance: collectively evaluated for impairment	8,699	8,987
Ending Balance: PCI Loans	0
Total Loans	4,474,762	3,160,418
Ending balance: individually evaluated for impairment	6,278	14,844
Ending balance: collectively evaluated for impairment	4,467,461	3,145,574
Ending Balance: PCI Loans	1,023
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	8,949	9,921
Charge-offs	(2,515)	(2,704)
Recoveries	657	662
Provision	1,969	1,901
Ending balance	9,060	9,780
Ending balance: collectively evaluated for impairment	9,060	9,780
Ending Balance: PCI Loans	0
Total Loans	387,529	360,550
Ending balance: individually evaluated for impairment	2,612
Ending balance: collectively evaluated for impairment	383,403	360,550
Ending Balance: PCI Loans	1,514
Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	127	145
Provision	(6)	(17)
Ending balance	121	128
Ending balance: collectively evaluated for impairment	121	128
Ending Balance: PCI Loans	0
Total Loans	43,038	38,817	$ 41,857
Ending balance: collectively evaluated for impairment	$ 43,038	$ 38,817

Analysis of Impaired Loans by C

Analysis of Impaired Loans by Class (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	$ 84,176	$ 84,480
Recorded Investment with No Allowance	45,811	49,576
Recorded Investment with Allowance	30,547	28,749
Total Recorded Investment	76,358	78,325
Related Allowance	5,373	5,864	$ 4,148
Average Recorded Investment	77,341	53,354
Real estate - residential [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	961	1,054
Recorded Investment with No Allowance	899	939
Total Recorded Investment	899	939
Average Recorded Investment	919	1,433
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	72,511	72,739
Recorded Investment with No Allowance	38,422	40,648
Recorded Investment with Allowance	29,064	27,356
Total Recorded Investment	67,486	68,004
Related Allowance	4,163	5,668
Average Recorded Investment	67,744	41,394
Construction [Member] | Real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	781	782
Recorded Investment with No Allowance	318	331
Recorded Investment with Allowance	118	118
Total Recorded Investment	436	449
Related Allowance	35	42
Average Recorded Investment	443	802
Real estate - commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	7,098	7,117
Recorded Investment with No Allowance	3,375	4,891
Recorded Investment with Allowance	1,365	1,275
Total Recorded Investment	4,740	6,166
Related Allowance	1,175	154
Average Recorded Investment	5,453	7,768
Real estate - HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	231	214
Recorded Investment with No Allowance	203	193
Total Recorded Investment	203	193
Average Recorded Investment	198	162
Other [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	2,594	2,574
Recorded Investment with No Allowance	2,594	2,574
Total Recorded Investment	2,594	2,574
Average Recorded Investment	$ 2,584	$ 1,795

Summary of Loans Restructured b

Summary of Loans Restructured by Class (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2
Pre-Modification Outstanding Recorded Investment	$ 12,056
Post-Modification Outstanding Recorded Investment	$ 12,056
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2
Pre-Modification Outstanding Recorded Investment	$ 12,056
Post-Modification Outstanding Recorded Investment	$ 12,056

Securities Available for Sale (

Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, Amortized Cost	$ 6,826,982	$ 6,813,011
Securities available for sale, Gross Unrealized Gains	69,378	36,393
Securities available for sale, Gross Unrealized Losses	(13,048)	(42,455)
Total securities available for sale, Fair Value	6,883,312	6,806,949
U.S. Treasury
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, Amortized Cost	353,828	350,354
Securities available for sale, Gross Unrealized Gains	442	1
Securities available for sale, Gross Unrealized Losses	(9)	(576)
Total securities available for sale, Fair Value	354,261	349,779
U.S. Agencies
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, Amortized Cost	593,489	667,414
Securities available for sale, Gross Unrealized Gains	424	7
Securities available for sale, Gross Unrealized Losses	(144)	(1,032)
Total securities available for sale, Fair Value	593,769	666,389
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, Amortized Cost	3,645,006	3,598,115
Securities available for sale, Gross Unrealized Gains	35,170	12,420
Securities available for sale, Gross Unrealized Losses	(11,638)	(38,089)
Total securities available for sale, Fair Value	3,668,538	3,572,446
State and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, Amortized Cost	2,154,346	2,116,543
Securities available for sale, Gross Unrealized Gains	33,312	23,965
Securities available for sale, Gross Unrealized Losses	(1,056)	(2,095)
Total securities available for sale, Fair Value	2,186,602	2,138,413
Corporates [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, Amortized Cost	80,313	80,585
Securities available for sale, Gross Unrealized Gains	30
Securities available for sale, Gross Unrealized Losses	(201)	(663)
Total securities available for sale, Fair Value	$ 80,142	$ 79,922

Summary of Contractual Maturity

Summary of Contractual Maturity Information for Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Due in 1 year or less, Amortized Cost	$ 1,056,562
Due after 1 year through 5 years, Amortized Cost	1,162,717
Due after 5 years through 10 years, Amortized Cost	849,567
Due after 10 years, Amortized Cost	113,130
Total, Amortized Cost	3,181,976
Mortgage-backed securities, Amortized Cost	3,645,006
Securities available for sale, Amortized Cost	6,826,982	$ 6,813,011
Due in 1 year or less, Fair Value	1,057,412
Due after 1 year through 5 years, Fair Value	1,176,382
Due after 5 years through 10 years, Fair Value	866,783
Due after 10 years, Fair Value	114,197
Total, Fair Value	3,214,774
Mortgage-backed securities, Fair Value	3,668,538
Total securities available for sale, Fair Value	$ 6,883,312	$ 6,806,949

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]
Proceeds from sales of securities available for sale	$ 282,031,000	$ 466,422,000
Gross realized gains from securities	2,900,000	7,300,000
Gross realized losses from securities	0	0
Sales of securities held to maturity	0	0
Unrealized gains on trading securities	48,000	$ 30,000
Fair value of other marketable securities	6,800,000		$ 7,200,000
Fair value of other non-marketable securities	2,100,000		2,000,000
U.S. Government and Other Public Deposit [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Pledged securities for deposits	5,700,000,000		5,900,000,000
Federal Reserve Discount Window [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Pledged securities for deposits	$ 1,500,000,000		$ 1,600,000,000

Gross Unrealized Losses and Fai

Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Gain (Loss) on Investments [Line Items]
Less than 12 months, Fair Value	$ 930,803	$ 3,525,188
Less than 12 months, Unrealized Losses	(3,425)	(24,120)
12 months or more, Fair Value	518,852	538,079
12 months or more, Unrealized Losses	(9,623)	(18,335)
Total Fair Value	1,449,655	4,063,267
Total Unrealized Losses	(13,048)	(42,455)
U.S. Treasury
Gain (Loss) on Investments [Line Items]
Less than 12 months, Fair Value	14,962	344,556
Less than 12 months, Unrealized Losses	(9)	(576)
Total Fair Value	14,962	344,556
Total Unrealized Losses	(9)	(576)
U.S. Agencies
Gain (Loss) on Investments [Line Items]
Less than 12 months, Fair Value	170,523	615,993
Less than 12 months, Unrealized Losses	(144)	(1,032)
Total Fair Value	170,523	615,993
Total Unrealized Losses	(144)	(1,032)
Mortgage-backed [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Fair Value	437,084	2,056,316
Less than 12 months, Unrealized Losses	(2,352)	(21,013)
12 months or more, Fair Value	447,502	426,959
12 months or more, Unrealized Losses	(9,286)	(17,076)
Total Fair Value	884,586	2,483,275
Total Unrealized Losses	(11,638)	(38,089)
State and political subdivisions [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Fair Value	295,146	479,197
Less than 12 months, Unrealized Losses	(906)	(1,316)
12 months or more, Fair Value	20,355	60,324
12 months or more, Unrealized Losses	(150)	(779)
Total Fair Value	315,501	539,521
Total Unrealized Losses	(1,056)	(2,095)
Corporates [Member]
Gain (Loss) on Investments [Line Items]
Less than 12 months, Fair Value	13,088	29,126
Less than 12 months, Unrealized Losses	(14)	(183)
12 months or more, Fair Value	50,995	50,796
12 months or more, Unrealized Losses	(187)	(480)
Total Fair Value	64,083	79,922
Total Unrealized Losses	$ (201)	$ (663)

Securities Held to Maturity (De

Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Held to Maturity, Amortized Cost	$ 804,652	$ 667,106
Held to Maturity, Net Unrealized Gains	54,676	24,273
Held to Maturity, Fair value	$ 859,328	$ 691,379

Contractual Maturity Informatio

Contractual Maturity Information for Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Due in 1 year or less, Amortized Cost	$ 15,971
Due after 1 year through 5 years, Amortized Cost	75,674
Due after 5 years through 10 years, Amortized Cost	463,546
Due after 10 years, Amortized Cost	249,461
Held to Maturity, Amortized Cost	804,652	$ 667,106
Due in 1 year or less, Fair Value	17,056
Due after 1 year through 5 years, Fair Value	80,816
Due after 5 years through 10 years, Fair Value	495,044
Due after 10 years, Fair Value	266,412
Total securities held to maturity, Fair Value	$ 859,328	$ 691,379

Schedule of Federal Reserve Ban

Schedule of Federal Reserve Bank Stock and Federal Home Loan Bank Stock and Other Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Other Securities [Line Items]
Fair Value	$ 64,600	$ 65,200
Federal Reserve Bank Stock and Other Securities [Member]
Schedule of Other Securities [Line Items]
Amortized Cost	56,897	57,075
Gross Unrealized Gains	7,695	8,123
Gross Unrealized Losses	(1)
Fair Value	64,591	65,198
Federal Reserve Bank Stock and Other Securities [Member] | Other securities - non-marketable [Member]
Schedule of Other Securities [Line Items]
Amortized Cost	23,226	23,855
Gross Unrealized Gains	927	964
Gross Unrealized Losses	(1)
Fair Value	24,152	24,819
Federal Reserve Bank Stock and Other Securities [Member] | Other securities - marketable [Member]
Schedule of Other Securities [Line Items]
Amortized Cost	4	5
Gross Unrealized Gains	6,768	7,159
Fair Value	6,772	7,164
Federal Reserve Bank Stock and Other Securities [Member] | FRB and FHLB stock [Member]
Schedule of Other Securities [Line Items]
Amortized Cost	33,667	33,215
Fair Value	$ 33,667	$ 33,215

Changes in Carrying Amount of G

Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Goodwill And Other Intangible Assets [Line Items]
Beginning Balance	$ 228,346	$ 209,758
Acquisition of Marquette	50	18,588
Ending Balance	228,396	228,346
Bank [Member]
Goodwill And Other Intangible Assets [Line Items]
Beginning Balance	161,341	142,753
Acquisition of Marquette	50	18,588
Ending Balance	161,391	161,341
Institutional Investment Management [Member]
Goodwill And Other Intangible Assets [Line Items]
Beginning Balance	47,529	47,529
Ending Balance	47,529	47,529
Asset Servicing [Member]
Goodwill And Other Intangible Assets [Line Items]
Beginning Balance	19,476	19,476
Ending Balance	$ 19,476	$ 19,476

Changes In Intangible Assets (D

Changes In Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 159,185	$ 159,185
Accumulated Amortization	115,629	112,403
Net Carrying Amount	43,556	46,782
Core deposit intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	47,527	36,497
Accumulated Amortization	36,433	33,613
Net Carrying Amount	11,094	2,884
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	107,460	104,560
Accumulated Amortization	75,902	73,496
Net Carrying Amount	31,558	31,064
Other intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,198	3,247
Accumulated Amortization	3,294	2,841
Net Carrying Amount	$ 904	406
Core deposit intangible-Marquette Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		11,030
Accumulated Amortization		1,838
Net Carrying Amount		9,192
Customer relationships - Marquette Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		2,900
Accumulated Amortization		338
Net Carrying Amount		2,562
Other intangible assets - Marquette Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		951
Accumulated Amortization		277
Net Carrying Amount		$ 674

Aggregate Amortization Expense

Aggregate Amortization Expense Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 3,226	$ 2,755

Estimated Amortization Expense

Estimated Amortization Expense of Intangible Assets (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
For the nine months ending December 31, 2016	$ 9,064
For the year ending December 31, 2017	10,180
For the year ending December 31, 2018	7,202
For the year ending December 31, 2019	5,822
For the year ending December 31, 2020	4,487
For the year ending December 31, 2021	$ 3,101

Remaining Contractual Maturitie

Remaining Contractual Maturities Of Repurchase Agreements (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 1,617,524
U.S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	117,701
U.S. Agencies
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	1,499,823
Maturity Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	1,614,424
Maturity Overnight and Continuous | U.S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	117,701
Maturity Overnight and Continuous | U.S. Agencies
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	1,496,723
Over 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	3,100
Over 90 Days [Member] | U.S. Agencies
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 3,100

Business Segment Reporting - Ad

Business Segment Reporting - Additional Information (Detail) - Segment	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Number of reportable segments	3	4

Schedule of Segment Financial R

Schedule of Segment Financial Results (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net interest income	$ 117,892	$ 90,358
Provision for loan losses	5,000	3,000
Noninterest income	116,350	125,207
Noninterest expense	180,744	164,413
Income before income taxes	48,498	48,152
Income tax expense	12,253	14,387
Net income	36,245	33,765
Average assets	19,335,000	16,832,000
Bank [Member]
Segment Reporting Information [Line Items]
Net interest income	115,271	89,360
Provision for loan losses	5,000	3,000
Noninterest income	75,441	74,689
Noninterest expense	143,361	125,178
Income before income taxes	42,351	35,871
Income tax expense	10,706	10,715
Net income	31,645	25,156
Average assets	17,885,000	15,814,000
Institutional Investment Management [Member]
Segment Reporting Information [Line Items]
Net interest income		1
Noninterest income	18,416	27,084
Noninterest expense	17,233	17,961
Income before income taxes	1,183	9,124
Income tax expense	289	2,750
Net income	894	6,374
Average assets	63,000	75,000
Asset Servicing [Member]
Segment Reporting Information [Line Items]
Net interest income	2,621	997
Noninterest income	22,493	23,434
Noninterest expense	20,150	21,274
Income before income taxes	4,964	3,157
Income tax expense	1,258	922
Net income	3,706	2,235
Average assets	$ 1,387,000	$ 943,000

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) $ / shares in Units, $ in Thousands	May. 31, 2015USD ($)Branchshares	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	May. 29, 2015$ / shares
Business Acquisition [Line Items]
Salaries and employee benefits		$ 107,150	$ 98,537
Legal and consulting		4,799	$ 4,378
Marquette [Member]
Business Acquisition [Line Items]
Percentage of outstanding common shares acquired in the acquisition	100.00%
Conversion of Company's common stock due to merger | shares	9.2295
Company's common shares issued | shares	3,470,000
Market value common stock issued	$ 179,700
Closing stock price | $ / shares				$ 51.79
Loans purchased at fair value	980,400
Long-term debt	89,971
Fair value of acquired identifiable intangible assets	14,900
Acquisition-related costs		3,000
Salaries and employee benefits		828
Legal and consulting		$ 1,600
Marquette [Member] | Core deposit intangible assets [Member]
Business Acquisition [Line Items]
Fair value of acquired identifiable intangible assets	11,000
Marquette [Member] | Customer Lists [Member]
Business Acquisition [Line Items]
Fair value of acquired identifiable intangible assets	2,900
Marquette [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Fair value of acquired identifiable intangible assets	1,000
Marquette [Member] | Marquette Capital Trust I, Marquette Capital Trust II, Marquette Capital Trust III And Marquette Capital Trust IV [Member]
Business Acquisition [Line Items]
Long-term debt	103,100
Long-term debt acquired at fair value	$ 65,500
Marquette [Member] | Trust Preferred Securities [Member] | Marquette Capital Trust I, Marquette Capital Trust III And Marquette Capital Trust IV [Member]
Business Acquisition [Line Items]
Interest rate description of trust preferred securities		LIBOR rate with spreads ranging from 133 basis points
Minimum [Member] | Marquette [Member] | Trust Preferred Securities [Member] | Marquette Capital Trust I, Marquette Capital Trust III And Marquette Capital Trust IV [Member]
Business Acquisition [Line Items]
Interest rate of trust preferred securities	1.33%
Maximum [Member] | Marquette [Member] | Trust Preferred Securities [Member] | Marquette Capital Trust I, Marquette Capital Trust III And Marquette Capital Trust IV [Member]
Business Acquisition [Line Items]
Interest rate of trust preferred securities	1.60%
Commercial Specialty Lending Business [Member] | Marquette [Member]
Business Acquisition [Line Items]
Number of branches | Branch	2
Arizona And Texas [Member] | Marquette [Member]
Business Acquisition [Line Items]
Number of branches | Branch	13

Summary of Net Assets Acquired

Summary of Net Assets Acquired (at Fair Value) and Consideration Transferred (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	May. 31, 2015	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill acquired		$ 228,396	$ 228,346	$ 209,758
Marquette [Member]
Business Acquisition [Line Items]
Loans	$ 980,404
Investment securities	177,694
Cash and due from banks	95,351
Premises and equipment, net	11,508
Identifiable intangible assets	14,881
Other assets	32,336
Total assets acquired	1,312,174
Noninterest-bearing deposits	226,161
Interest-bearing deposits	708,675
Short-term debt	112,133
Long-term debt	89,971
Other liabilities	14,135
Total liabilities assumed	1,151,075
Net identifiable assets acquired	161,099
Goodwill acquired	18,638
Net assets acquired	$ 179,737
Company's common shares issued	3,470
Purchase price per share of the Company's common stock	$ 51.79
Fair value of total consideration transferred	$ 179,737

Notional Amount of Off-Balance

Notional Amount of Off-Balance Sheet Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Commitments to extend credit for loans (excluding credit card loans) [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	$ 6,392,371	$ 6,671,794
Commitments to extend credit under credit card loans [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	3,049,160	2,986,581
Commercial letters of credit [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	9,706	11,541
Standby letters of credit [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	352,526	360,468
Futures contracts [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	500
Forward foreign exchange contracts [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	42,078	75,611
Spot foreign exchange contracts [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract or notional amount of off-balance sheet financial instruments	$ 2,084	$ 10,391

Summary of Fair Value of Deriva

Summary of Fair Value of Derivative Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair value	$ 19,487	$ 12,303
Liability Derivatives, Fair value	24,126	12,258
Derivatives not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair value	18,882	11,700
Liability Derivatives, Fair value	19,455	11,921
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair value	605	603
Liability Derivatives, Fair value	$ 4,671	$ 337

Derivatives and Hedging Activ62

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)Derivative	Mar. 31, 2015USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Termination value of derivatives in net liability position	$ 24,600,000
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effective portion of change in fair value of cash flow hedges	$ (4,140,000)
Interest rate hedging exposure to variability in future cash flows for forecasted transactions, maximum period	20 years 6 months
Interest Rate Swap [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of interest rate swaps	$ 51,500,000
Number of interest rate swaps | Derivative	2
Interest Rate Swap [Member] | Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of interest rate swaps	$ 16,000,000
Number of interest rate swaps | Derivative	2
Interest Rate Swap [Member] | Derivatives not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of interest rate swaps	$ 511,800,000
Number of interest rate swaps | Derivative	40
Gain (Loss) related to changes in fair value of swaps	$ (352,000)	$ (106,000)
Interest Rate Products [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) related to changes in fair value of swaps	(1,000)	(5,000)
Interest Rate Products [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effective portion of change in fair value of cash flow hedges	(4,140,000)
Interest Rate Products [Member] | Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) related to changes in fair value of swaps	192,000	110,000
Interest Rate Products [Member] | Derivatives not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) related to changes in fair value of swaps	$ (352,000)	$ (106,000)

Summary of Amount of Gain or Lo

Summary of Amount of Gain or Loss Recognized in Other Non-Interest Expense in Consolidated Statements of Income Related to Derivative Assets and Liabilities (Detail) - Interest Rate Products [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivatives not Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	$ (352)	$ (106)
Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	(1)	(5)
Derivatives Designated as Hedging Instruments [Member] | Fair value adjustments on derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	(193)	(115)
Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	$ 192	$ 110

Summary of Amount of Gain or 64

Summary of Amount of Gain or Loss Recognized in AOCI in Consolidated Statements of Comprehensive Income Related to Company's Derivative Assets and Liabilities (Detail) - Derivatives Designated as Hedging Instruments [Member] - Cash Flow Hedging [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in other Comprehensive Income on Derivatives (Effective Portion)	$ (4,140)
Interest Rate Products [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in other Comprehensive Income on Derivatives (Effective Portion)	$ (4,140)

Assets and Liabilities Measured

Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 26,779	$ 29,617
Available for sale securities	6,883,312	6,806,949
Derivatives	19,487	12,303
Contingent consideration liability		17,718	$ 32,445	$ 53,411
Derivatives	24,126	12,258
Fair Value Measurement, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	26,779	29,617
Available for sale securities	6,883,312	6,806,949
Company-owned life insurance	31,137	31,205
Bank-owned life insurance	204,736	202,991
Derivatives	19,487	12,303
Total	7,165,451	7,083,065
Deferred compensation	39,582	32,937
Contingent consideration liability		17,718
Derivatives	24,126	12,258
Total	63,708	62,913
Fair Value Measurement, Recurring [Member] | Trading - other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	18,008	17,708
Fair Value Measurement, Recurring [Member] | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	400	400
Available for sale securities	354,261	349,779
Fair Value Measurement, Recurring [Member] | U.S. Agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,077	1,309
Available for sale securities	593,769	666,389
Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	3,668,538	3,572,446
Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	6,294	10,200
Available for sale securities	2,186,602	2,138,413
Fair Value Measurement, Recurring [Member] | Corporates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	80,142	79,922
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	18,200	18,100
Available for sale securities	434,400	429,700
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	18,160	18,108
Available for sale securities	434,403	429,701
Total	452,563	447,809
Deferred compensation	39,582	32,937
Total	39,582	32,937
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | Trading - other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	17,760	17,708
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	400	400
Available for sale securities	354,261	349,779
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | Corporates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	80,142	79,922
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	8,600	11,500
Available for sale securities	6,448,900	6,377,200
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	8,619	11,509
Available for sale securities	6,448,909	6,377,248
Company-owned life insurance	31,137	31,205
Bank-owned life insurance	204,736	202,991
Derivatives	19,487	12,303
Total	6,712,888	6,635,256
Derivatives	24,126	12,258
Total	24,126	12,258
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | Trading - other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	248
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,077	1,309
Available for sale securities	593,769	666,389
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	3,668,538	3,572,446
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	6,294	10,200
Available for sale securities	$ 2,186,602	2,138,413
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability		17,718
Total		$ 17,718

Reconciliation of Beginning and

Reconciliation of Beginning and Ending Fair Value of Balances of Contingent Consideration Liability (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Beginning Balance	$ 17,718	$ 53,411
Payment of contingent considerations on acquisitions	(17,784)	(18,702)
Fair value adjustments	$ 66	(2,264)
Ending Balance		$ 32,445

Assets Measured at Fair Value o

Assets Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value, Measurements, Non-Recurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 25,274	$ 26,154
Total Gains (Losses) Recognized	491	(3,957)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	25,274	26,154
Impaired loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	25,174	22,885
Total Gains (Losses) Recognized	491	(3,957)
Impaired loans [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	25,174	22,885
Other real estate owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	100	3,269
Other real estate owned [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 100	$ 3,269

Estimated Fair Value of Financi

Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	$ 898,200	$ 1,154,700
Securities available for sale	6,883,312	6,806,949
Securities held to maturity	804,652	667,106
Trading securities	26,779	29,617
Other securities	64,600	65,200
Loans (exclusive of allowance for loan loss)	9,704,500	9,431,300
Derivatives	19,500	12,300
Demand and savings deposits	14,380,700	13,836,900
Time deposits	1,037,600	1,255,900
Other borrowings	1,686,700	1,823,100
Long-term debt	85,238	86,070
Derivatives	24,100	12,300
Total Estimated Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	898,200	1,154,700
Securities available for sale	6,883,300	6,806,900
Securities held to maturity	859,300	691,400
Trading securities	26,800	29,600
Other securities	64,600	65,200
Loans (exclusive of allowance for loan loss)	9,779,700	9,452,100
Derivatives	19,500	12,300
Demand and savings deposits	14,380,700	13,836,900
Time deposits	1,037,600	1,255,900
Other borrowings	1,686,700	1,823,100
Long-term debt	85,700	86,400
Derivatives	24,100	12,300
Commitments to extend credit for loans	1,300	4,900
Commercial letters of credit	100	300
Standby letters of credit	600	2,600
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	733,600	997,000
Securities available for sale	434,400	429,700
Trading securities	18,200	18,100
Demand and savings deposits	14,380,700	13,836,900
Other borrowings	64,200	66,900
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	164,600	157,700
Securities available for sale	6,448,900	6,377,200
Securities held to maturity	859,300	691,400
Trading securities	8,600	11,500
Other securities	64,600	65,200
Loans (exclusive of allowance for loan loss)	9,779,700	9,452,100
Derivatives	19,500	12,300
Time deposits	1,037,600	1,255,900
Other borrowings	1,622,500	1,756,200
Long-term debt	85,700	86,400
Derivatives	$ 24,100	$ 12,300