UMB Financial (UMBF) 10-Q 1 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 25, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'UMBF	'
Entity Registrant Name	'UMB FINANCIAL CORP	'
Entity Central Index Key	'0000101382	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	45,438,349

CONSOLIDATED_BALANCE_SHEETS_Un

CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Loans:	$6,759,089	$6,520,512
Allowance for loan losses	-75,514	-74,751
Net loans	6,683,575	6,445,761
Loans held for sale	1,108	1,357
Investment Securities:	'	'
Available for sale	6,734,931	6,762,411
Held to maturity (market value of $236,898 and $231,510, respectively)	219,724	209,770
Trading securities	43,055	28,464
Federal Reserve Bank stock and other	54,551	50,482
Total investment securities	7,052,261	7,051,127
Federal funds sold and securities purchased under agreements to resell	108,986	87,018
Interest-bearing due from banks	770,458	2,093,467
Cash and due from banks	593,956	521,001
Bank premises and equipment, net	247,770	249,689
Accrued income	75,384	78,216
Goodwill	209,758	209,758
Other intangibles	52,483	55,585
Other assets	150,091	118,873
Total assets	15,945,830	16,911,852
Deposits:	'	'
Noninterest-bearing demand	5,303,067	5,189,998
Interest-bearing demand and savings	5,747,984	7,001,126
Time deposits under $100,000	458,484	491,792
Time deposits of $100,000 or more	756,236	957,850
Total deposits	12,265,771	13,640,766
Federal funds purchased and repurchase agreements	1,973,736	1,583,218
Short-term debt	'	107
Long-term debt	5,815	5,055
Accrued expenses and taxes	118,918	153,450
Other liabilities	39,392	23,191
Total liabilities	14,403,632	15,405,787
SHAREHOLDERS' EQUITY	'	'
Common stock, $1.00 par value; 80,000,000 shares authorized, 55,056,730 shares issued, and 45,433,101 and 45,221,237 shares outstanding, respectively	55,057	55,057
Capital surplus	883,195	882,407
Retained earnings	897,826	884,630
Accumulated other comprehensive loss	-13,297	-32,640
Treasury stock, 9,623,629 and 9,835,493 shares, at cost, respectively	-280,583	-283,389
Total shareholders' equity	1,542,198	1,506,065
Total liabilities and shareholders' equity	$15,945,830	$16,911,852

CONSOLIDATED_BALANCE_SHEETS_Un1

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Held to maturity, market value	$236,898	$231,510
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	45,433,101	45,221,237
Treasury stock, shares	9,623,629	9,835,493

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
INTEREST INCOME	'	'
Loans	$58,900	$54,720
Securities:	'	'
Taxable interest	18,961	18,465
Tax-exempt interest	9,907	9,760
Total securities income	28,868	28,225
Federal funds and resell agreements	33	24
Interest-bearing due from banks	1,123	669
Trading securities	123	264
Total interest income	89,047	83,902
INTEREST EXPENSE	'	'
Deposits	3,059	3,792
Federal funds purchased and repurchase agreements	481	567
Other	62	60
Total interest expense	3,602	4,419
Net interest income	85,445	79,483
Provision for loan losses	4,500	2,000
Net interest income after provision for loan losses	80,945	77,483
NONINTEREST INCOME	'	'
Trust and securities processing	71,563	62,312
Trading and investment banking	4,323	7,109
Service charges on deposit accounts	21,558	21,523
Insurance fees and commissions	603	961
Brokerage fees	1,815	2,946
Bankcard fees	15,623	16,439
Gain on sales of securities available for sale, net	1,470	5,893
Equity earnings on alternative investments	2,530	'
Other	3,479	3,833
Total noninterest income	122,964	121,016
NONINTEREST EXPENSE	'	'
Salaries and employee benefits	88,881	83,702
Occupancy, net	9,705	9,887
Equipment	12,663	11,934
Supplies and services	4,637	4,487
Marketing and business development	4,602	4,272
Processing fees	13,651	14,090
Legal and consulting	3,372	3,600
Bankcard	3,688	4,547
Amortization of other intangible assets	3,102	3,456
Regulatory fees	2,516	1,911
Contingency reserve (Note 7)	15,000	'
Other	10,424	8,492
Total noninterest expense	172,241	150,378
Income before income taxes	31,668	48,121
Income tax expense	8,255	13,180
NET INCOME	$23,413	$34,941
PER SHARE DATA	'	'
Net income - basic	$0.52	$0.88
Net income - diluted	$0.52	$0.87
Dividends	$0.23	$0.22
Weighted average shares outstanding	44,742,068	39,881,505

STATEMENTS_OF_CONSOLIDATED_COM

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'
Net income	$23,413	$34,941
Unrealized gains on securities:	'	'
Change in unrealized holding gains (losses), net	32,459	-27,048
Less: Reclassifications adjustment for gains included in net income	-1,470	-5,893
Change in unrealized gains (losses) on securities during the period	30,989	-32,941
Income tax (expense) benefit	-11,646	10,925
Other comprehensive income (loss)	19,343	-22,016
Comprehensive income	$42,756	$12,925

STATEMENTS_OF_CHANGES_IN_CONSO

STATEMENTS OF CHANGES IN CONSOLIDATED SHAREHOLDERS' EQUITY (Unaudited) (USD $)	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
In Thousands
Beginning Balance at Dec. 31, 2012	$1,279,345	$55,057	$732,069	$787,015	$85,588	($380,384)
Total comprehensive income	12,925	'	'	34,941	-22,016	'
Cash dividends	-8,711	'	'	-8,711	'	'
Purchase of treasury stock	-1,656	'	'	'	'	-1,656
Issuance of equity awards	449	'	-2,592	'	'	3,041
Recognition of equity based compensation	1,913	'	1,913	'	'	'
Net tax benefit related to equity compensation plans	332	'	332	'	'	'
Sale of treasury stock	66	'	42	'	'	24
Exercise of stock options	895	'	445	'	'	450
Ending Balance at Mar. 31, 2013	1,285,558	55,057	732,209	813,245	63,572	-378,525
Beginning Balance at Dec. 31, 2013	1,506,065	55,057	882,407	884,630	-32,640	-283,389
Total comprehensive income	42,756	'	'	23,413	19,343	'
Cash dividends	-10,217	'	'	-10,217	'	'
Purchase of treasury stock	-2,867	'	'	'	'	-2,867
Issuance of equity awards	469	'	-3,648	'	'	4,117
Recognition of equity based compensation	2,212	'	2,212	'	'	'
Net tax benefit related to equity compensation plans	1,068	'	1,068	'	'	'
Sale of treasury stock	220	'	143	'	'	77
Exercise of stock options	2,492	'	1,013	'	'	1,479
Ending Balance at Mar. 31, 2014	$1,542,198	$55,057	$883,195	$897,826	($13,297)	($280,583)

STATEMENTS_OF_CHANGES_IN_CONSO1

STATEMENTS OF CHANGES IN CONSOLIDATED SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement Of Stockholders Equity [Abstract]	'	'
Cash Dividends, per share	$0.23	$0.22

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating Activities	'	'
Net income	$23,413	$34,941
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Provision for loan losses	4,500	2,000
Depreciation and amortization	11,344	10,969
Deferred income tax benefit	-2,822	-2,591
Net increase in trading securities and other earning assets	-17,121	-16,824
Gains on sales of securities available for sale	-1,470	-5,893
(Gains) losses on sales of assets	-550	303
Amortization of securities premiums, net of discount accretion	13,276	13,433
Originations of loans held for sale	-11,545	-39,543
Net gains on sales of loans held for sale	-189	-211
Proceeds from sales of loans held for sale	11,983	37,326
Issuance of equity awards	469	449
Equity based compensation	2,212	1,913
Changes in:	'	'
Accrued income (expense)	2,832	-761
Accrued expenses and taxes	-28,557	-11,956
Other assets and liabilities, net	-25,719	11,790
Net cash (used in) provided by operating activities	-17,944	35,345
Investing Activities	'	'
Proceeds from maturities of securities held to maturity	4,500	7,996
Proceeds from sales of securities available for sale	77,583	333,912
Proceeds from maturities of securities available for sale	516,001	514,720
Purchases of securities held to maturity	-16,600	-22,734
Purchases of securities available for sale	-544,487	-805,695
Net increase in loans	-242,279	-327,354
Net (increase) decrease in fed funds sold and resell agreements	-21,968	70,822
Net increase in interest bearing balances due from other financial institutions	-53,471	-1,004
Purchases of bank premises and equipment	-6,926	-8,011
Net cash received from acquisitions	'	-692
Proceeds from sales of bank premises and equipment	1,153	808
Net cash used in investing activities	-286,494	-237,232
Financing Activities	'	'
Net (increase) decrease in demand and savings deposits	-1,140,073	1,121,789
Net decrease in time deposits	-234,922	-215,696
Net decrease (increase) in fed funds purchased and repurchase agreements	390,518	-127,927
Net decrease in short-term debt	-107	-99
Proceeds from long-term debt	1,820	'
Repayment of long-term debt	-1,060	-972
Payment of contingent consideration on acquisitions	-5,975	-4,899
Cash dividends paid	-10,201	-8,526
Net tax benefit related to equity compensation plans	1,068	332
Proceeds from exercise of stock options and sales of treasury shares	2,712	961
Purchases of treasury stock	-2,867	-1,656
Net cash (used in) provided by financing activities	-999,087	763,307
(Decrease) increase in cash and due from banks	-1,303,525	561,420
Cash and cash equivalents at beginning of period	2,582,428	1,366,394
Cash and cash equivalents at end of period	1,278,903	1,927,814
Supplemental Disclosures:	'	'
Income taxes paid	16,053	9,302
Total interest paid	$3,720	$4,608

Financial_Statement_Presentati

Financial Statement Presentation	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Financial Statement Presentation	'
	1. Financial Statement Presentation
	The condensed 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 Management’s Discussion and Analysis of Financial Condition and Results of Operations within this Form 10-Q filing and in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
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, and Wisconsin. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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 listed in the Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
	Interest-bearing Due From Banks
	Amounts due from the Federal Reserve Bank which are interest-bearing for all periods presented, and amounts due from certificates of deposits issued by other financial institutions are included in interest-bearing due from banks. The amounts due from certificates of deposit totaled $82.9 million and $22.9 million at March 31, 2014 and March 31, 2013, respectively.
	This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of March 31, 2014 and March 31, 2013 (in thousands):
		March 31,
		2014		2013
	Due from the Federal Reserve	$	684,947	$	1,608,279
	Cash and due from banks		593,956		319,535
	Cash and cash equivalents at end of period	$	1,278,903	$	1,927,814
	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 640,622 and 418,210 shares issuable upon the exercise of stock options granted by the Company at March 31, 2014 and 2013, respectively.
	Options issued under employee benefit plans to purchase 258,254 and 280,611 shares of common stock were outstanding at March 31, 2014 and 2013, respectively, but were not included in the computation of diluted EPS because the options were anti-dilutive.

New_Accounting_Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2014
Accounting Changes And Error Corrections [Abstract]	'
New Accounting Pronouncements	'
	3. New Accounting Pronouncements
	Investment Companies In June 2013, the FASB issued ASU No. 2013-08, “Amendments to the Scope, Measurement, and Disclosure Requirements” for investment companies. The amendments changed the assessment of whether an entity is an investment company by requiring an entity to possess certain fundamental characteristics, while allowing judgment in assessing other typical characteristics. The ASU was effective January 1, 2014, and the Company did not change the status of any subsidiary, or the accounting applied to a subsidiary, under the new guidelines.
	Accounting for Investments in Qualified Affordable Housing Projects In January 2014, the FASB issued ASU No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects.” The amendments permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Regardless of whether the reporting entity chooses to elect the proportional amortization method, this ASU introduces new recurring disclosures about all investments in qualified affordable housing projects. The ASU is effective for interim and annual reporting periods beginning after December 15, 2014. The adoption of this accounting pronouncement will not have a significant impact on the Company’s financial statements or financial statement disclosures.
	Reclassification of Residential Real Estate Loans In January 2014, the FASB issued ASU No. 2014-04, “Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure.” The amendment is intended to reduce diversity in practice by clarifying when an in substance repossession or foreclosure occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loans such that the loan receivable should be derecognized and the real stated property recognized. The amendments in this update are effective for interim and annual periods beginning after December 15, 2014. The adoption of this accounting pronouncement will not have a significant impact on the Company’s financial statements.

Loans_and_Allowance_for_Loan_L

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2014
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. 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.
	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 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 from approved long-term borrowers, 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, ability to repay, 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.
	This table provides a summary of loan classes and an aging of past due loans at March 31, 2014 and December 31, 2013 (in thousands):
			March 31, 2014
			30-89			Greater			Non-Accrual			Total		Current			Total Loans
			Days Past			than 90			Loans			Past Due
			Due and			Days Past
			Accruing			Due and
						Accruing
	Commercial:
	Commercial		$	3,478		$	2,023		$	8,611		$	14,112	$	3,475,917		$	3,490,029
	Commercial – credit card			368			126			25			519		120,835			121,354
	Real estate:
	Real estate – construction			768			—			921			1,689		184,271			185,960
	Real estate – commercial			2,660			—			18,104			20,764		1,690,106			1,710,870
	Real estate – residential			1,114			—			946			2,060		292,345			294,405
	Real estate – HELOC			1,983			—			325			2,308		568,121			570,429
	Consumer:
	Consumer – credit card			2,391			2,853			869			6,113		294,183			300,296
	Consumer – other			2,943			99			352			3,394		58,299			61,693
	Leases			157			—			—			157		23,896			24,053
	Total loans		$	15,862		$	5,101		$	30,153		$	51,116	$	6,707,973		$	6,759,089
			December 31, 2013
			30-89			Greater			Non-Accrual			Total		Current			Total Loans
			Days Past			than 90			Loans			Past Due
			Due and			Days Past
			Accruing			Due and
						Accruing
	Commercial:
	Commercial		$	2,107		$	135		$	8,042		$	10,284	$	3,291,219		$	3,301,503
	Commercial – credit card			362			82			38			482		102,788			103,270
	Real estate:
	Real estate – construction			186			—			934			1,120		151,755			152,875
	Real estate – commercial			3,611			344			19,213			23,168		1,678,983			1,702,151
	Real estate – residential			1,257			13			868			2,138		287,218			289,356
	Real estate – HELOC			880			6			210			1,096		565,032			566,128
	Consumer:
	Consumer – credit card			3,230			2,448			1,031			6,709		311,627			318,336
	Consumer – other			1,727			190			370			2,287		60,625			62,912
	Leases			—			—			—			—		23,981			23,981
	Total loans		$	13,360		$	3,218		$	30,706		$	47,284	$	6,473,228		$	6,520,512
	The Company sold $12.0 million and $37.3 million of residential real estate and student loans in the secondary market without recourse during the periods ended March 31, 2014 and March 31, 2013, respectively.
	The Company has ceased the recognition of interest on loans with a carrying value of $30.2 million and $30.7 million at March 31, 2014 and December 31, 2013, respectively. Restructured loans totaled $12.1 million at March 31, 2014 and December 31, 2013. Loans 90 days past due and still accruing interest amounted to $5.1 million and $3.2 million at March 31, 2014 and December 31, 2013, respectively. There was an insignificant amount of interest recognized on impaired loans during 2014 and 2013.
	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. The loans in any of the three categories below are considered to be a criticized loan. A description of the general characteristics of the loan ranking categories is as follows:
		•		Watch – This rating represents credit exposure that presents higher than average risk and warrants greater than routine attention by Company personnel due to conditions affecting the borrower, the borrower’s industry or the economic environment. These conditions have resulted in some degree of uncertainty that results in higher than average credit risk.
		•		Special Mention – This rating reflects a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or the institution’s credit position at some future date. The rating is not adversely classified and does not expose an institution to sufficient risk to warrant adverse classification.
		•		Substandard – This rating represents an asset inadequately protected by the financial worth and paying capacity of the borrower or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Loans in this category are characterized by the distinct possibility that the bank will sustain some loss if the deficiencies are not corrected. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified substandard. This category may include loans where the collection of full principal and interest is doubtful or remote.
	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 at March 31, 2014 and December 31, 2013 (in thousands):
	Credit Exposure
	Credit Risk Profile by Risk Rating
			Commercial						Real estate - construction
			March 31,			December 31,			March 31,			December 31,
			2014			2013			2014			2013
	Non-watch list		$	3,229,699		$	3,041,224		$	183,855		$	151,359
Watch			107,824			110,932			801			210
Special Mention			74,830			78,064			—			—
Substandard			77,676			71,283			1,304			1,306
Total		$	3,490,029		$	3,301,503		$	185,960		$	152,875
		Real estate - commercial
		March 31,			December 31,
		2014			2013
Non-watch list		$	1,565,623		$	1,565,894
Watch			79,620			76,647
Special Mention			19,644			19,876
Substandard			45,983			39,734
Total		$	1,710,870		$	1,702,151
Credit Exposure
Credit Risk Profile Based on Payment Activity
		Commercial - credit card						Real estate - residential
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
Performing		$	121,329		$	103,232		$	293,459		$	288,488
Non-performing			25			38			946			868
Total		$	121,354		$	103,270		$	294,405		$	289,356
		Real estate - HELOC						Consumer - credit card
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
Performing		$	570,104		$	565,918		$	299,427		$	317,305
Non-performing			325			210			869			1,031
Total		$	570,429		$	566,128		$	300,296		$	318,336
		Consumer - other						Leases
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
Performing		$	61,341		$	62,542		$	24,053		$	23,981
Non-performing			352			370			—			—
Total		$	61,693		$	62,912		$	24,053		$	23,981
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.
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, 2014 (in thousands):
		Three Months Ended March 31, 2014
		Commercial			Real estate			Consumer			Leases		Total
Allowance for loan losses:
Beginning balance		$	48,886		$	15,342		$	10,447		$	76	$	74,751
Charge-offs			(1,471	)		(126	)		(3,088	)		—		(4,685	)
Recoveries			67			9			872			—		948
Provision			881			866			2,753			—		4,500
Ending Balance		$	48,363		$	16,091		$	10,984		$	76	$	75,514
Ending Balance: individually evaluated for impairment		$	2,541		$	1,719		$	—		$	—	$	4,260
Ending Balance: collectively evaluated for impairment			45,822			14,372			10,984			76		71,254
Loans:
Ending Balance: loans		$	3,611,383		$	2,761,664		$	361,989		$	24,053	$	6,759,089
Ending Balance: individually evaluated for impairment			14,719			14,555			2			—		29,276
Ending Balance: collectively evaluated for impairment			3,596,664			2,747,109			361,987			24,053		6,729,813
ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT IN LOANS (in thousands)
This table provides a rollforward of the allowance for loan losses by portfolio segment for three months ended March 31, 2013 (in thousands):
		Three Months Ended March 31, 2013
		Commercial			Real estate			Consumer			Leases		Total
Allowance for loan losses:
Beginning balance		$	43,390		$	15,506		$	12,470		$	60	$	71,426
Charge-offs			(1,397	)		(195	)		(3,257	)		—		(4,849	)
Recoveries			374			9			921			—		1,304
Provision			978			(374	)		1,395			1		2,000
Ending Balance		$	43,345		$	14,946		$	11,529		$	61	$	69,881
Ending Balance: individually evaluated for impairment		$	3,206		$	309		$	—		$	—	$	3,515
Ending Balance: collectively evaluated for impairment			40,139			14,637			11,529			61		66,366
Loans:
Ending Balance: loans		$	3,305,175		$	2,320,388		$	365,217		$	19,901	$	6,010,681
Ending Balance: individually evaluated for impairment			15,974			10,140			46			—		26,160
Ending Balance: collectively evaluated for impairment			3,289,201			2,310,248			365,171			19,901		5,984,521
Impaired Loans
This table provides an analysis of impaired loans by class at March 31, 2014 and December 31, 2013 (in thousands):
		Three Months Ended
		March 31, 2014
		Unpaid			Recorded			Recorded			Total		Related			Average
		Principal			Investment			Investment			Recorded		Allowance			Recorded
		Balance			with No			with			Investment					Investment
					Allowance			Allowance
Commercial:
Commercial		$	17,684		$	2,855		$	11,864		$	14,719	$	2,541		$	14,678
Commercial – credit card			—			—			—			—		—			—
Real estate:
Real estate – construction			1,403			798			123			921		98			927
Real estate – commercial			14,360			3,052			9,574			12,626		1,621			13,074
Real estate – residential			1,221			1,008			—			1,008		—			1,048
Real estate – HELOC			—			—			—			—		—			—
Consumer:
Consumer – credit card			—			—			—			—		—			—
Consumer – other			3			2			—			2		—			6
Leases			—			—			—			—		—			—
Total		$	34,671		$	7,715		$	21,561		$	29,276	$	4,260		$	29,733
		Year Ended
		December 31, 2013
		Unpaid			Recorded			Recorded			Total		Related			Average
		Principal			Investment			Investment			Recorded		Allowance			Recorded
		Balance			with No			with			Investment					Investment
					Allowance			Allowance
Commercial:
Commercial		$	17,227		$	3,228		$	11,407		$	14,635	$	2,882		$	14,791
Commercial – credit card			—			—			—			—		—			—
Real estate:
Real estate – construction			1,408			810			123			933		—			1,186
Real estate – commercial			14,686			5,305			8,218			13,523		94			10,506
Real estate – residential			1,317			1,087			—			1,087		1,276			1,122
Real estate – HELOC			—			—			—			—		—			—
Consumer:
Consumer – credit card			—			—			—			—		—			—
Consumer – other			12			11			—			11		—			34
Leases			—			—			—			—		—			—
Total		$	34,650		$	10,441		$	19,748		$	30,189	$	4,252		$	27,639
Troubled Debt Restructurings
A loan modification is considered a troubled debt restructuring (TDR) when a concession had 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.
The Company had $279 thousand in commitments to lend to borrowers with loan modifications classified as TDR’s. The Company made no TDR’s in the last 12 months that had payment defaults for the three month period ended March 31, 2014.
This table provides a summary of loans restructured by class during the three months ended March 31, 2014 and 2013 (in thousands):
		Three Months Ended March 31, 2014									Three Months Ended March 31, 2013
		Number			Pre-Modification			Post-			Number		Pre-Modification			Post-
		of			Outstanding			Modification			of		Outstanding			Modification
		Contracts			Recorded			Outstanding			Contracts		Recorded			Outstanding
					Investment			Recorded					Investment			Recorded
								Investment								Investment
Troubled Debt Restructurings
Commercial:
Commercial			1		$	469		$	469			—	$	—		$	—
Commercial – credit card			—			—			—			—		—			—
Real estate:
Real estate – construction			—			—			—			—		—			—
Real estate – commercial			—			—			—			2		1,408			1,407
Real estate – residential			—			—			—			—		—			—
Real estate – HELOC			—			—			—			—		—			—
Consumer:
Consumer – credit card			—			—			—			—		—			—
Consumer – other			—			—			—			—		—			—
Leases			—			—			—			—		—			—
Total			1		$	469		$	469			2	$	1,408		$	1,407

Securities

Securities	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013 (in thousands):
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
	March 31, 2014	Cost		Gains			Losses			Value
	U.S. Treasury	$	252,195	$	320		$	(725	)	$	251,790
	U.S. Agencies		1,019,869		1,797			(2,041	)		1,019,625
	Mortgage-backed		3,108,155		23,477			(48,246	)		3,083,386
	State and political subdivisions		1,951,916		24,097			(18,441	)		1,957,572
	Corporates		424,106		539			(2,087	)		422,558
	Total	$	6,756,241	$	50,230		$	(71,540	)	$	6,734,931
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
	December 31, 2013	Cost		Gains			Losses			Value
	U.S. Treasury	$	110,789	$	284		$	(873	)	$	110,200
	U.S. Agencies		1,258,176		2,793			(3,306	)		1,257,663
	Mortgage-backed		2,984,963		23,942			(64,339	)		2,944,566
	State and political subdivisions		2,003,509		23,493			(31,756	)		1,995,246
	Corporates		457,275		902			(3,441	)		454,736
	Total	$	6,814,712	$	51,414		$	(103,715	)	$	6,762,411
	The following table presents contractual maturity information for securities available for sale at March 31, 2014 (in thousands):
		Amortized		Fair
		Cost		Value
	Due in 1 year or less	$	469,340	$	471,680
	Due after 1 year through 5 years		2,303,020		2,314,245
	Due after 5 years through 10 years		729,845		726,462
	Due after 10 years		145,881		139,158
	Total		3,648,086		3,651,545
	Mortgage-backed securities		3,108,155		3,083,386
	Total securities available for sale	$	6,756,241	$	6,734,931
	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, 2014, proceeds from the sales of securities available for sale were $77.6 million compared to $333.9 million for the same period in 2013. Securities transactions resulted in gross realized gains of $1.5 million and $5.9 million for the three months ended March 31, 2014 and 2013. The gross realized losses for the three months ended March 31, 2014 and 2013 were $11 thousand and $37 thousand, respectively.
	Securities available for sale and held to maturity with a market value of $5.4 billion at March 31, 2014 and $5.9 billion at December 31, 2013 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 $1.6 billion at March 31, 2014 and $1.7 billion at December 31, 2013 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, 2014 and December 31, 2013 (in thousands).
	March 31, 2014	Less than 12 months					12 months or more						Total
	Description of Securities	Fair Value		Unrealized			Fair			Unrealized			Fair Value		Unrealized
				Losses			Value			Losses					Losses
	U.S. Treasury	$	103,744	$	(725	)	$	—		$	—		$	103,744	$	(725	)
	U.S. Agencies		504,992		(1,612	)		33,680			(429	)		538,672		(2,041	)
	Mortgage-backed		1,824,634		(42,933	)		127,158			(5,313	)		1,951,792		(48,246	)
	State and political subdivisions		600,148		(12,825	)		109,243			(5,616	)		709,391		(18,441	)
	Corporates		195,055		(1,423	)		43,670			(664	)		238,725		(2,087	)
	Total temporarily - impaired debt securities available for sale	$	3,228,573	$	(59,518	)	$	313,751		$	(12,022	)	$	3,542,324	$	(71,540	)
	December 31, 2013	Less than 12 months					12 months or more						Total
	Description of Securities	Fair Value		Unrealized			Fair			Unrealized			Fair Value		Unrealized
				Losses			Value			Losses					Losses
	U.S. Treasury	$	39,822	$	(873	)	$	—		$	—		$	39,822	$	(873	)
	U.S. Agencies		675,509		(3,130	)		9,824			(176	)		685,333		(3,306	)
	Mortgage-backed		1,945,964		(60,719	)		89,147			(3,620	)		2,035,111		(64,339	)
	State and political subdivisions		662,225		(25,064	)		87,061			(6,692	)		749,286		(31,756	)
	Corporates		271,834		(2,458	)		41,522			(983	)		313,356		(3,441	)
	Total temporarily - impaired debt securities available for sale	$	3,595,354	$	(92,244	)	$	227,554		$	(11,471	)	$	3,822,908	$	(103,715	)
	The unrealized losses in the Company’s investments in U.S. treasury obligations, U.S. government agencies, federal agency 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 fair value. 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, 2014.
	Securities Held to Maturity
	The table below provides detailed information for securities held to maturity at March 31, 2014 and December 31, 2013 (in thousands):
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
	March 31, 2014	Cost		Gains			Losses			Value
	State and political subdivisions	$	219,724	$	17,174		$	—		$	236,898
	December 31, 2013
	State and political subdivisions	$	209,770	$	21,740		$	—		$	231,510
	The following table presents contractual maturity information for securities held to maturity at March 31, 2014 (in thousands):
	Amortized		Fair
	Cost		Value
Due in 1 year or less	$	61	$	66
Due after 1 year through 5 years		27,251		29,381
Due after 5 years through 10 years		98,703		106,418
Due after 10 years		93,709		101,033
Total securities held to maturity	$	219,724	$	236,898
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 2014 or 2013.
Trading Securities
The net unrealized gains on trading securities at March 31, 2014 and March 31, 2013 were $0.3 million and $0.2 million, respectively, and were included in trading and investment banking income on the consolidated statements of income.
Federal Reserve Bank Stock and Other Securities
The table below provides detailed information for Federal Reserve Bank stock and other securities at March 31, 2014 and December 31, 2013(in thousands):
			Gross			Gross
	Amortized		Unrealized			Unrealized			Fair
	Cost		Gains			Losses			Value
March 31, 2014
Federal Reserve Bank stock	$	16,279	$	—		$	—		$	16,279
Other securities – marketable		—		17,385			—			17,385
Other securities – non-marketable		18,427		2,460			—			20,887
Total Federal Reserve Bank stock and other	$	34,706	$	19,845		$	—		$	54,551
December 31, 2013
Federal Reserve Bank stock	$	16,279	$	—		$	—		$	16,279
Other securities – marketable		20		16,612			—			16,632
Other securities – non-marketable		17,139		432			—			17,571
Total Federal Reserve Bank stock and other	$	33,438	$	17,044		$	—		$	50,482
Federal Reserve Bank stock is based on the capital structure of the investing bank and is carried at cost. Other marketable and non-marketable securities include Prairie Capital Management 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 $17.4 million at March 31, 2014 and $16.6 million at December 31, 2013. The fair value of other non-marketable securities includes alternative investment securities of $6.3 million at March 31, 2014 and $4.7 million at December 31, 2013. Unrealized gains or losses on alternative investments are recognized in the Equity 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, 2014
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, 2014 and December 31, 2013 by reportable segment are as follows (in thousands):
		Bank		Institutional		Asset		Total
				Investment		Servicing
				Management
	Balances as of January 1, 2013	$	142,753	$	47,529	$	19,476	$	209,758
	Balances as of December 31, 2013	$	142,753	$	47,529	$	19,476	$	209,758
	Balances as of January 1, 2014	$	142,753	$	47,529	$	19,476	$	209,758
	Balances as of March 31, 2014	$	142,753	$	47,529	$	19,476	$	209,758
	Following are the finite-lived intangible assets that continue to be subject to amortization as of March 31, 2014 and December 31, 2013 (in thousands):
		As of March 31, 2014
		Gross		Accumulated		Net
		Carrying		Amortization		Carrying
		Amount				Amount
	Core deposit intangible assets	$	36,497	$	31,946	$	4,551
	Customer relationships		103,960		56,835		47,125
	Other intangible assets		3,247		2,440		807
	Total intangible assets	$	143,704	$	91,221	$	52,483
		As of December 31, 2013
		Gross		Accumulated		Net
		Carrying		Amortization		Carrying
		Amount				Amount
	Core deposit intangible assets	$	36,497	$	31,674	$	4,823
	Customer relationships		103,960		54,062		49,898
	Other intangible assets		3,247		2,383		864
	Total intangible assets	$	143,704	$	88,119	$	55,585
	Following is the aggregate amortization expense recognized in each period (in thousands):
		Three Months Ended
		March  31,
		2014		2013
	Aggregate amortization expense	$	3,102	$	3,456
	Estimated amortization expense of intangible assets on future years (in thousands):
	For the nine months ending December 31, 2014	$	9,044
	For the year ending December 31, 2015		9,550
	For the year ending December 31, 2016		8,342
	For the year ending December 31, 2017		7,098
	For the year ending December 31, 2018		4,908

Commitments_Contingencies_and_

Commitments, Contingencies and Guarantees	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments, Contingencies and Guarantees	'
	7. 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,
		2014		2013
	Commitments to extend credit for loans (excluding credit card loans)	$	2,793,554	$	2,690,268
	Commitments to extend credit under credit card loans		2,314,445		2,215,278
	Commercial letters of credit		1,562		5,949
	Standby letters of credit		387,889		356,054
	Futures contracts		4,500		—
	Forward foreign exchange contracts		16,802		21,525
	Spot foreign exchange contracts		1,342		8,001
	On March 28, 2014, the Company received objections to its calculation of an earn-out amount owed to the sellers of Prairie Capital Management, LLC (PCM) and a related incentive bonus calculation. The sellers, which include current employees of PCM, claim that a $16.6 million unrealized gain on equity method investments managed by PCM should have been included in the Company’s calculations, which are governed by the asset purchase agreement. The Company disputes this claim but desires to avoid future distractions to the operations of PCM. Based on the probability of future resolution, a $15.0 million contingency reserve was recorded during the first quarter of 2014. This contingency reserve is included in the Other liabilities line on the Company’s consolidated balance sheet and the Contingency reserve line on Company’s consolidated statements of income.

Business_Segment_Reporting

Business Segment Reporting	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Business Segment Reporting	'
	8. Business Segment Reporting
	The Company has strategically aligned its operations into the following four reportable segments (collectively, “Business Segments”): Bank, Payment Solutions, Institutional Investment Management, and Asset Servicing. Business segment financial results produced by the Company’s internal management reporting system are evaluated regularly by senior executive officers in deciding how to allocate resources and assess performance for individual Business Segments. The management reporting system assigns balance sheet and income statement items to each business segment using methodologies that are refined on an ongoing basis. For comparability purposes, amounts in all periods presented are based on methodologies in effect at March 31, 2014. 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 provides a full range of banking services to commercial, retail, government and correspondent bank customers through the Company’s branches, call center, internet banking, and ATM network. Services include traditional commercial and consumer banking, treasury management, leasing, foreign exchange, merchant bankcard, wealth management, brokerage, insurance, capital markets, investment banking, corporate trust, and correspondent banking.
	Payment Solutions provides consumer and commercial credit and debit card, prepaid debit card solutions, healthcare services, and institutional cash management. Healthcare services include health savings account and flexible savings account products for healthcare providers, third-party administrators and large employers.
	Institutional Investment Management provides equity and fixed income investment strategies in the intermediary and institutional markets via mutual funds, traditional separate accounts and sub-advisory relationships.
	Asset Servicing provides services to the asset management industry, supporting a range of investment products, including mutual funds, alternative investments and managed accounts. Services include fund administration, fund accounting, investor services, transfer agency, distribution, marketing, custody, alternative investment services, and collective and multiple-series trust services.
	Business Segment Information
	Segment financial results were as follows (in thousands):
		Three Months Ended March 31, 2014
		Bank		Payment		Institutional			Asset		Total
				Solutions		Investment			Servicing
						Management
	Net interest income	$	71,121	$	12,388	$	(2	)	$	1,938	$	85,445
	Provision for loan losses		2,426		2,074		—			—		4,500
	Noninterest income		47,420		20,235		34,095			21,214		122,964
	Noninterest expense		107,753		21,015		25,894			17,579		172,241
	Income before taxes		8,362		9,534		8,199			5,573		31,668
	Income tax expense		1,942		2,609		2,184			1,520		8,255
	Net income	$	6,420	$	6,925	$	6,015		$	4,053	$	23,413
	Average assets	$	12,299,000	$	1,952,000	$	74,000		$	2,179,000	$	16,504,000
		Three Months Ended March 31, 2013
		Bank		Payment		Institutional			Asset		Total
				Solutions		Investment			Servicing
						Management
	Net interest income	$	67,260	$	11,548	$	—		$	675	$	79,483
	Provision for loan losses		309		1,691		—			—		2,000
	Noninterest income		52,748		19,437		28,552			20,279		121,016
	Noninterest expense		91,536		20,117		18,845			19,880		150,378
	Income before taxes		28,163		9,177		9,707			1,074		48,121
	Income tax expense		7,705		2,534		2,667			274		13,180
	Net income	$	20,458	$	6,643	$	7,040		$	800	$	34,941
	Average assets	$	11,306,000	$	1,698,000	$	78,000		$	1,701,000	$	14,783,000

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Derivatives and Hedging Activities	'
	9. 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 value 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. 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 Balance Sheet
	The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2014 and December 31, 2013. The Company’s derivative asset and derivative liability are located within Other assets and Other liabilities, respectively, on the Company’s Consolidated Balance Sheet.
	This table provides a summary of the fair value of the Company’s derivative assets and liabilities as of March 31, 2014 and December 31, 2013 (in thousands):
		Asset Derivatives					Liability Derivatives
	Fair value	March 31,			December 31,		March 31,		December 31,
		2014			2013		2014		2013
	Interest Rate Products:
	Derivatives not designated as hedging instruments	$	3,378		$	2,442	$	3,365	$	2,346
	Derivatives designated as hedging instruments		—			76		43		—
	Total	$	3,378		$	2,518	$	3,408	$	2,346
	Fair Value Hedges of Interest Rate Risk
	The Company is exposed to changes in the fair value of certain of its fixed-rate assets due to changes in the benchmark interest rate, LIBOR. Interest rate swaps designated as fair value hedges involve making fixed-rate payments to a counterparty in exchange for the Company receiving variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. As of March 31, 2014, the Company had one interest rate swap with a notional amount of $6.8 million that was designated as a fair value hedge of interest rate risk associated with the Company’s fixed rate loan assets.
	Designated Hedges
	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. During the three months ended March 31, 2014, the Company recognized a net loss of $10 thousand in other noninterest expense related to hedge ineffectiveness.
	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. 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, 2014, the Company had 26 interest rate swaps with an aggregate notional amount of $333.5 million related to this program. During the three months ended March 31, 2014 and 2013, the Company recognized net losses of $83 thousand and net gains of $106 thousand, respectively, related to changes in the fair value of these swaps.
	Effect of Derivative Instruments on the Income Statement
	This table provides a summary of the amount of gain (loss) recognized in other noninterest expense in the Consolidated Statements of Income related to the Company’s derivative asset and liability as of March 31, 2014 and March 31, 2013 (in thousands):
		Amount of Gain (Loss) Recognized
		For the Year Ended
		March 31,
		2014			2013
	Interest Rate Products
	Derivatives not designated as hedging instruments	$	(83	)	$	106
	Total	$	(83	)	$	106
	Interest Rate Products
	Derivatives designated as hedging instruments
	Fair value adjustments on derivatives	$	(119	)	$	—
	Fair value adjustments on hedged items		109			—
	Total	$	(10	)	$	—
	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, 2014 the termination value of derivatives in a net liability position, which includes accrued interest, related to these agreements was $0.2 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, 2014, 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, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	10. 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, 2014, 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, 2014 and December 31, 2013 (in thousands):
		Fair Value Measurement As of March 31, 2014
	Description	March 31,			Quoted Prices in			Significant Other			Significant
		2014			Active Markets for			Observable			Unobservable
					Identical Assets			Inputs (Level 2)			Inputs (Level 3)
					(Level 1)
	Assets
	U.S. Treasury	$	400		$	400		$	—		$	—
	U.S. Agencies		—			—			—			—
	Mortgage-backed		7,406			—			7,406			—
	State and political subdivisions		5,273			—			5,273			—
	Trading – other		29,976			29,979			(3	)		—
	Trading securities		43,055			30,379			12,676			—
	U.S. Treasury		251,790			251,790			—			—
	U.S. Agencies		1,019,625			—			1,019,625			—
	Mortgage-backed		3,083,386			—			3,083,386			—
	State and political subdivisions		1,957,572			—			1,957,572			—
	Corporates		422,558			422,558			—			—
	Available for sale securities		6,734,931			674,348			6,060,583			—
	Company-owned life insurance		20,058			—			20,058			—
	Derivatives		3,378			—			3,378			—
	Total	$	6,801,422		$	704,727		$	6,096,695		$	—
	Liabilities
	Deferred compensation	$	24,106		$	24,106		$	—		$	—
	Contingent consideration liability		44,700			—			—			44,700
	Derivatives		3,408			—			3,408			—
	Total	$	72,214		$	24,106		$	3,408		$	44,700
		Fair Value Measurement as of December 31, 2013
	Description	December 31,			Quoted Prices in			Significant Other			Significant
		2013			Active Markets			Observable			Unobservable
					for Identical			Inputs (Level 2)			Inputs (Level 3)
					Assets (Level 1)
	Assets
	U.S. Treasury	$	400		$	400		$	—		$	—
	U.S. Agencies		—			—			—			—
	Mortgage-backed		515			—			515			—
	State and political subdivisions		3,072			—			3,072			—
	Trading – other		24,477			24,477			—			—
	Trading securities		28,464			24,877			3,587			—
	U.S. Treasury		110,200			110,200			—			—
	U.S. Agencies		1,257,663			—			1,257,663			—
	Mortgage-backed		2,944,566			—			2,944,566			—
	State and political subdivisions		1,995,246			—			1,995,246			—
	Corporates		454,736			454,736			—			—
	Available for sale securities		6,762,411			564,936			6,197,475			—
	Company-owned life insurance		19,619			—			19,619			—
	Derivatives		2,518			—			2,518			—
	Total	$	6,813,012		$	589,813		$	6,223,199		$	—
	Liabilities
	Deferred compensation		19,825		$	19,825		$	—		$	—
	Contingent consideration liability		46,201			—			—			46,201
	Derivatives		2,346			—			2,346			—
	Total	$	68,372		$	19,825		$	2,346		$	46,201
	The following table reconciles the beginning and ending fair value of balances of the contingent consideration liability:
		Three Months Ended
		March 31,
		2014			2013
	Beginning Balance	$	46,201		$	51,163
	Payment of contingent considerations on acquisitions		(5,975	)		(4,899	)
	Income from fair value adjustments		—			(138	)
Expense from fair value adjustments		4,474			3,316
Ending Balance	$	44,700		$	49,442
The following table presents certain quantitative information about the significant unobservable input used in the fair value measurement for the contingent consideration liability measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
Description	Valuation Techniques		Significant	Range
			Unobservable Inputs
Liabilities
Contingent consideration liability	Discounted cash flows		Revenue and expense growth percentage	1% - 78%
An increase in the revenue growth percentage may result in a significantly higher estimated fair value of the contingent consideration liability. Alternatively, a decrease in the revenue growth percentage may result in a significantly lower estimated fair value of the contingent consideration liability.
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:
Securities Available for Sale and Investment Securities Fair values are based on quoted market prices or dealer quotes, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities.
Trading Securities Fair values for trading securities (including financial futures), are based on quoted market prices where available. If quoted market prices are not available, fair values are based on quoted market prices for similar securities.
Company-owned Life Insurance Fair values are based on quoted market prices or dealer quotes with adjustments for dividends, capital gains, and administrative charges.
Derivatives Fair values are determined using valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.
Deferred Compensation Fair values are based on quoted market prices or dealer quotes.
Contingent Consideration The fair value of contingent consideration liabilities are derived from a discounted cash flow model of future contingent payments. The valuation of these liabilities are estimated by a collaborative effort of the Company’s mergers and acquisitions group, business unit management, and the corporate accounting group. These groups report primarily to the Company’s Chief Financial Officer. These future contingent payments are calculated based on estimates of future income and expense from each acquisition. These estimated cash flows are projected by the business unit management and reviewed by the mergers and acquisitions group. To obtain a current valuation of these projected cash flows, an expected present value technique is utilized to calculate a discount rate. The cash flow projections and discount rates are reviewed quarterly and updated as market conditions necessitate. Potential valuation adjustments are made as future income and expense projections for each acquisition are made which affect the calculation of the related contingent consideration payment. These adjustments are recorded through noninterest income and expense.
Assets measured at fair value on a non-recurring basis as of March 31, 2014 and December 31, 2013 (in thousands):
	Fair Value Measurement at March 31, 2014 Using
Description	March 31,			Quoted Prices			Significant			Significant		Total Gains
	2014			in Active			Other			Unobservable		(Losses)
				Markets for			Observable			Inputs		Recognized
				Identical			Inputs			(Level 3)		During the
				Assets			(Level 2)					Three Months
				(Level 1)								Ended
												March 31
Impaired loans	$	17,301		$	—		$	—		$	17,301	$	(8	)
Other real estate owned		35			—			—			35	$	—
Total	$	17,336		$	—		$	—		$	17,336	$	(8	)
	Fair Value Measurement at December 31, 2013 Using
Description	December 31,			Quoted Prices			Significant			Significant		Total Gains
	2013			in Active			Other			Unobservable		(Losses)
				Markets for			Observable			Inputs		Recognized
				Identical			Inputs			(Level 3)		During the
				Assets			(Level 2)					Twelve Months
				(Level 1)								Ended
												December 31
Impaired loans	$	15,496		$	—		$	—		$	15,496	$	(2,496	)
Other real estate owned		329			—			—			329		(125	)
Total	$	15,825		$	—		$	—		$	15,825	$	(2,621	)
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 While the overall loan portfolio is not carried at fair value, adjustments are recorded on certain loans to reflect partial write-downs that are based on the value of the underlying collateral. In determining the value of real estate collateral, the Director of Property Management, who reports to the Chief Administrative Officer, obtains external appraisals. The external appraisals are generally based on recent sales of comparable properties which are then adjusted for the unique characteristics of the property being valued. Upon receiving the external appraisal, the Company’s appraisal department led by the Chief Appraiser who reports to the Chief Credit Officer review the appraisal to determine if the appraisal is a reasonable basis for the value of the property based upon historical experience and detailed knowledge of the specific property and location. In the case of non-real estate collateral, reliance is placed on a variety of sources, including external estimates of value and judgments based on the experience and expertise of internal specialists within the Company’s property management group and the Company’s credit department. The valuation of the impaired loans is reviewed on a quarterly basis. Because many of these inputs are not observable, the measurements are classified as Level 3.
Other real estate owned Other real estate owned consists of loan collateral which has been repossessed through foreclosure. This collateral is comprised of commercial and residential real estate and other non-real estate property, including auto, recreational and marine vehicles. Other real estate owned is recorded as held for sale initially at the lower of the loan balance or fair value of the collateral. The initial valuation of the foreclosed property is obtained through an appraisal process similar to the process described in the impaired loans paragraph above. Subsequent to foreclosure, valuations are reviewed quarterly and updated periodically, and the assets may be marked down further, reflecting a new cost basis. Fair value measurements may be based upon appraisals or third-party price opinions and, accordingly, those measurements may be classified as Level 2. Other fair value measurements may be based on internally developed pricing methods, and those measurements may be classified as Level 3.
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, 2014 and December 31, 2013 are as follows (in millions):
	Fair Value Measurement at March 31, 2014 Using
	Carrying			Quoted Prices			Significant			Significant		Total
	Amount			in Active			Other			Unobservable		Estimated
				Markets for			Observable			Inputs		Fair
				Identical			Inputs			(Level 3)		Value
				Assets			(Level 2)
				(Level 1)
FINANCIAL ASSETS
Securities held to maturity	$	219.7		$	—		$	236.9		$	—	$	236.9
Federal Reserve Bank and other		54.6			—			54.6			—		54.6
Loans (exclusive of allowance for loan loss)		6,760.20			—			6,799.60			—		6,799.60
FINANCIAL LIABILITIES
Time deposits		1,214.70			—			1,212.90			—		1,212.90
Long-term debt		5.8			—			6			—		6
OFF-BALANCE SHEET ARRANGEMENTS
Commitments to extend credit for loans													1.5
Commercial letters of credit													0.1
Standby letters of credit													0.5
	Fair Value Measurement at December 31, 2013 Using
	Carrying			Quoted Prices			Significant			Significant		Total
	Amount			in Active			Other			Unobservable		Estimated
				Markets for			Observable			Inputs		Fair
				Identical			Inputs			(Level 3)		Value
				Assets			(Level 2)
				(Level 1)
FINANCIAL ASSETS
Securities held to maturity	$	209.8		$	—		$	231.5		$	—	$	231.5
Federal Reserve Bank and other s		50.5			—			50.5			—		50.5
Loans (exclusive of allowance for loan loss)		6,521.90			—			6,571.60			—		6,571.60
FINANCIAL LIABILITIES
Time deposits		1,449.60			—			1,449.40			—		1,449.40
Long-term debt		5.1			—			4.5			—		4.5
OFF-BALANCE SHEET ARRANGEMENTS
Commitments to extend credit for loans													6
Commercial letters of credit													0.1
Standby letters of credit													2
The fair values of cash and short-term investments, demand and savings deposits, federal funds and repurchase agreements, and short-term debt approximate the carrying values.
Securities Held to Maturity Fair value of held-to-maturity securities are estimated by discounting the future cash flows using the current rates at which similar investments would be made to borrowers with similar credit ratings and for the same remaining maturities.
Federal Reserve Bank and Other Amount consists of Federal Reserve Bank stock held by the Bank, Prairie Capital Management equity-method investments, and other miscellaneous investments. The fair value of Federal Reserve Bank stock is considered to be the carrying value as no readily determinable market exists for these investments because they can only be redeemed with the FRB. The fair value of Prairie Capital Management marketable equity-method investments are based on quoted market prices used to estimate the value of the underlying investment. For non-marketable equity-method investments, the Company’s proportionate share of the income or loss is recognized on a one-quarter lag based on the valuation of the underlying investment(s).
Loans Fair values are estimated for portfolios with similar financial characteristics. Loans are segregated by type, such as commercial, real estate, consumer, and credit card. Each loan category is further segmented into fixed and variable interest rate categories. The fair value of loans is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities.
Time Deposits The fair value of fixed-maturity certificates of deposit is estimated by discounting the future cash flows using the rates that are currently offered for deposits of similar remaining maturities.
Long-Term Debt Rates currently available to the Company for debt with similar terms and remaining maturities are used to estimate fair value of existing debt.
Other Off-Balance Sheet Instruments The fair value of loan commitments and letters of credit are determined based on the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreement and the present creditworthiness of the counterparties. Neither the fees earned during the year on these instruments nor their fair value at year-end are significant to the Company’s consolidated financial position.
The fair value estimates presented herein are based on pertinent information available to management as of March 31, 2014 and December 31, 2013. Although management is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these consolidated financial statements since those dates and, therefore, current estimates of fair value may differ significantly from the amount presented herein.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Nature of Operations	'
	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, and Wisconsin. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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 listed in the Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
Interest-bearing Due From Banks	'
	Interest-bearing Due From Banks
	Amounts due from the Federal Reserve Bank which are interest-bearing for all periods presented, and amounts due from certificates of deposits issued by other financial institutions are included in interest-bearing due from banks. The amounts due from certificates of deposit totaled $82.9 million and $22.9 million at March 31, 2014 and March 31, 2013, respectively.
	This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of March 31, 2014 and March 31, 2013 (in thousands):
		March 31,
		2014		2013
	Due from the Federal Reserve	$	684,947	$	1,608,279
	Cash and due from banks		593,956		319,535
	Cash and cash equivalents at end of period	$	1,278,903	$	1,927,814
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 640,622 and 418,210 shares issuable upon the exercise of stock options granted by the Company at March 31, 2014 and 2013, respectively.
	Options issued under employee benefit plans to purchase 258,254 and 280,611 shares of common stock were outstanding at March 31, 2014 and 2013, respectively, but were not included in the computation of diluted EPS because the options were anti-dilutive.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and March 31, 2013 (in thousands):
		March 31,
		2014		2013
	Due from the Federal Reserve	$	684,947	$	1,608,279
	Cash and due from banks		593,956		319,535
	Cash and cash equivalents at end of period	$	1,278,903	$	1,927,814

Loans_and_Allowance_for_Loan_L1

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
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, 2014 and December 31, 2013 (in thousands):
		March 31, 2014
		30-89			Greater			Non-Accrual			Total		Current			Total Loans
		Days Past			than 90			Loans			Past Due
		Due and			Days Past
		Accruing			Due and
					Accruing
	Commercial:
	Commercial	$	3,478		$	2,023		$	8,611		$	14,112	$	3,475,917		$	3,490,029
	Commercial – credit card		368			126			25			519		120,835			121,354
	Real estate:
	Real estate – construction		768			—			921			1,689		184,271			185,960
	Real estate – commercial		2,660			—			18,104			20,764		1,690,106			1,710,870
	Real estate – residential		1,114			—			946			2,060		292,345			294,405
	Real estate – HELOC		1,983			—			325			2,308		568,121			570,429
	Consumer:
	Consumer – credit card		2,391			2,853			869			6,113		294,183			300,296
	Consumer – other		2,943			99			352			3,394		58,299			61,693
	Leases		157			—			—			157		23,896			24,053
	Total loans	$	15,862		$	5,101		$	30,153		$	51,116	$	6,707,973		$	6,759,089
		December 31, 2013
		30-89			Greater			Non-Accrual			Total		Current			Total Loans
		Days Past			than 90			Loans			Past Due
		Due and			Days Past
		Accruing			Due and
					Accruing
	Commercial:
	Commercial	$	2,107		$	135		$	8,042		$	10,284	$	3,291,219		$	3,301,503
	Commercial – credit card		362			82			38			482		102,788			103,270
	Real estate:
	Real estate – construction		186			—			934			1,120		151,755			152,875
	Real estate – commercial		3,611			344			19,213			23,168		1,678,983			1,702,151
	Real estate – residential		1,257			13			868			2,138		287,218			289,356
	Real estate – HELOC		880			6			210			1,096		565,032			566,128
	Consumer:
	Consumer – credit card		3,230			2,448			1,031			6,709		311,627			318,336
	Consumer – other		1,727			190			370			2,287		60,625			62,912
	Leases		—			—			—			—		23,981			23,981
	Total loans	$	13,360		$	3,218		$	30,706		$	47,284	$	6,473,228		$	6,520,512
Credit Risk Profile by Risk Rating	'
	Credit Exposure
	Credit Risk Profile by Risk Rating
		Commercial						Real estate - construction
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
	Non-watch list	$	3,229,699		$	3,041,224		$	183,855		$	151,359
	Watch		107,824			110,932			801			210
	Special Mention		74,830			78,064			—			—
	Substandard		77,676			71,283			1,304			1,306
	Total	$	3,490,029		$	3,301,503		$	185,960		$	152,875
		Real estate - commercial
		March 31,			December 31,
		2014			2013
	Non-watch list	$	1,565,623		$	1,565,894
	Watch		79,620			76,647
	Special Mention		19,644			19,876
	Substandard		45,983			39,734
	Total	$	1,710,870		$	1,702,151
Credit Risk Profile Based on Payment Activity	'
	Credit Exposure
	Credit Risk Profile Based on Payment Activity
		Commercial - credit card						Real estate - residential
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
	Performing	$	121,329		$	103,232		$	293,459		$	288,488
	Non-performing		25			38			946			868
	Total	$	121,354		$	103,270		$	294,405		$	289,356
		Real estate - HELOC						Consumer - credit card
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
	Performing	$	570,104		$	565,918		$	299,427		$	317,305
	Non-performing		325			210			869			1,031
	Total	$	570,429		$	566,128		$	300,296		$	318,336
		Consumer - other						Leases
		March 31,			December 31,			March 31,			December 31,
		2014			2013			2014			2013
	Performing	$	61,341		$	62,542		$	24,053		$	23,981
	Non-performing		352			370			—			—
	Total	$	61,693		$	62,912		$	24,053		$	23,981
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, 2014 (in thousands):
		Three Months Ended March 31, 2014
		Commercial			Real estate			Consumer			Leases		Total
	Allowance for loan losses:
	Beginning balance	$	48,886		$	15,342		$	10,447		$	76	$	74,751
	Charge-offs		(1,471	)		(126	)		(3,088	)		—		(4,685	)
	Recoveries		67			9			872			—		948
	Provision		881			866			2,753			—		4,500
	Ending Balance	$	48,363		$	16,091		$	10,984		$	76	$	75,514
	Ending Balance: individually evaluated for impairment	$	2,541		$	1,719		$	—		$	—	$	4,260
	Ending Balance: collectively evaluated for impairment		45,822			14,372			10,984			76		71,254
	Loans:
	Ending Balance: loans	$	3,611,383		$	2,761,664		$	361,989		$	24,053	$	6,759,089
	Ending Balance: individually evaluated for impairment		14,719			14,555			2			—		29,276
	Ending Balance: collectively evaluated for impairment		3,596,664			2,747,109			361,987			24,053		6,729,813
	This table provides a rollforward of the allowance for loan losses by portfolio segment for three months ended March 31, 2013 (in thousands):
		Three Months Ended March 31, 2013
		Commercial			Real estate			Consumer			Leases		Total
	Allowance for loan losses:
	Beginning balance	$	43,390		$	15,506		$	12,470		$	60	$	71,426
	Charge-offs		(1,397	)		(195	)		(3,257	)		—		(4,849	)
	Recoveries		374			9			921			—		1,304
	Provision		978			(374	)		1,395			1		2,000
	Ending Balance	$	43,345		$	14,946		$	11,529		$	61	$	69,881
	Ending Balance: individually evaluated for impairment	$	3,206		$	309		$	—		$	—	$	3,515
	Ending Balance: collectively evaluated for impairment		40,139			14,637			11,529			61		66,366
	Loans:
	Ending Balance: loans	$	3,305,175		$	2,320,388		$	365,217		$	19,901	$	6,010,681
	Ending Balance: individually evaluated for impairment		15,974			10,140			46			—		26,160
	Ending Balance: collectively evaluated for impairment		3,289,201			2,310,248			365,171			19,901		5,984,521
Analysis of Impaired Loans	'
	This table provides an analysis of impaired loans by class at March 31, 2014 and December 31, 2013 (in thousands):
		Three Months Ended
		March 31, 2014
		Unpaid			Recorded			Recorded			Total		Related			Average
		Principal			Investment			Investment			Recorded		Allowance			Recorded
		Balance			with No			with			Investment					Investment
					Allowance			Allowance
	Commercial:
	Commercial	$	17,684		$	2,855		$	11,864		$	14,719	$	2,541		$	14,678
	Commercial – credit card		—			—			—			—		—			—
	Real estate:
	Real estate – construction		1,403			798			123			921		98			927
	Real estate – commercial		14,360			3,052			9,574			12,626		1,621			13,074
	Real estate – residential		1,221			1,008			—			1,008		—			1,048
	Real estate – HELOC		—			—			—			—		—			—
	Consumer:
	Consumer – credit card		—			—			—			—		—			—
	Consumer – other		3			2			—			2		—			6
	Leases		—			—			—			—		—			—
	Total	$	34,671		$	7,715		$	21,561		$	29,276	$	4,260		$	29,733
		Year Ended
		December 31, 2013
		Unpaid			Recorded			Recorded			Total		Related			Average
		Principal			Investment			Investment			Recorded		Allowance			Recorded
		Balance			with No			with			Investment					Investment
					Allowance			Allowance
	Commercial:
	Commercial	$	17,227		$	3,228		$	11,407		$	14,635	$	2,882		$	14,791
	Commercial – credit card		—			—			—			—		—			—
	Real estate:
	Real estate – construction		1,408			810			123			933		—			1,186
	Real estate – commercial		14,686			5,305			8,218			13,523		94			10,506
	Real estate – residential		1,317			1,087			—			1,087		1,276			1,122
	Real estate – HELOC		—			—			—			—		—			—
	Consumer:
	Consumer – credit card		—			—			—			—		—			—
	Consumer – other		12			11			—			11		—			34
	Leases		—			—			—			—		—			—
	Total	$	34,650		$	10,441		$	19,748		$	30,189	$	4,252		$	27,639
Summary of Loans Restructured by Class	'
	This table provides a summary of loans restructured by class during the three months ended March 31, 2014 and 2013 (in thousands):
		Three Months Ended March 31, 2014									Three Months Ended March 31, 2013
		Number			Pre-Modification			Post-			Number		Pre-Modification			Post-
		of			Outstanding			Modification			of		Outstanding			Modification
		Contracts			Recorded			Outstanding			Contracts		Recorded			Outstanding
					Investment			Recorded					Investment			Recorded
								Investment								Investment
	Troubled Debt Restructurings
	Commercial:
	Commercial		1		$	469		$	469			—	$	—		$	—
	Commercial – credit card		—			—			—			—		—			—
	Real estate:
	Real estate – construction		—			—			—			—		—			—
	Real estate – commercial		—			—			—			2		1,408			1,407
	Real estate – residential		—			—			—			—		—			—
	Real estate – HELOC		—			—			—			—		—			—
	Consumer:
	Consumer – credit card		—			—			—			—		—			—
	Consumer – other		—			—			—			—		—			—
	Leases		—			—			—			—		—			—
	Total		1		$	469		$	469			2	$	1,408		$	1,407

Securities_Tables

Securities (Tables)	3 Months Ended
	Mar. 31, 2014
Securities Available for Sale	'
	This table provides detailed information about securities available for sale at March 31, 2014 and December 31, 2013 (in thousands):
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
	March 31, 2014	Cost		Gains			Losses			Value
	U.S. Treasury	$	252,195	$	320		$	(725	)	$	251,790
	U.S. Agencies		1,019,869		1,797			(2,041	)		1,019,625
	Mortgage-backed		3,108,155		23,477			(48,246	)		3,083,386
	State and political subdivisions		1,951,916		24,097			(18,441	)		1,957,572
	Corporates		424,106		539			(2,087	)		422,558
	Total	$	6,756,241	$	50,230		$	(71,540	)	$	6,734,931
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
	December 31, 2013	Cost		Gains			Losses			Value
	U.S. Treasury	$	110,789	$	284		$	(873	)	$	110,200
	U.S. Agencies		1,258,176		2,793			(3,306	)		1,257,663
	Mortgage-backed		2,984,963		23,942			(64,339	)		2,944,566
	State and political subdivisions		2,003,509		23,493			(31,756	)		1,995,246
	Corporates		457,275		902			(3,441	)		454,736
	Total	$	6,814,712	$	51,414		$	(103,715	)	$	6,762,411
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, 2014 and December 31, 2013 (in thousands).
	March 31, 2014	Less than 12 months					12 months or more						Total
	Description of Securities	Fair Value		Unrealized			Fair			Unrealized			Fair Value		Unrealized
				Losses			Value			Losses					Losses
	U.S. Treasury	$	103,744	$	(725	)	$	—		$	—		$	103,744	$	(725	)
	U.S. Agencies		504,992		(1,612	)		33,680			(429	)		538,672		(2,041	)
	Mortgage-backed		1,824,634		(42,933	)		127,158			(5,313	)		1,951,792		(48,246	)
	State and political subdivisions		600,148		(12,825	)		109,243			(5,616	)		709,391		(18,441	)
	Corporates		195,055		(1,423	)		43,670			(664	)		238,725		(2,087	)
	Total temporarily - impaired debt securities available for sale	$	3,228,573	$	(59,518	)	$	313,751		$	(12,022	)	$	3,542,324	$	(71,540	)
	December 31, 2013	Less than 12 months					12 months or more						Total
	Description of Securities	Fair Value		Unrealized			Fair			Unrealized			Fair Value		Unrealized
				Losses			Value			Losses					Losses
	U.S. Treasury	$	39,822	$	(873	)	$	—		$	—		$	39,822	$	(873	)
	U.S. Agencies		675,509		(3,130	)		9,824			(176	)		685,333		(3,306	)
	Mortgage-backed		1,945,964		(60,719	)		89,147			(3,620	)		2,035,111		(64,339	)
	State and political subdivisions		662,225		(25,064	)		87,061			(6,692	)		749,286		(31,756	)
	Corporates		271,834		(2,458	)		41,522			(983	)		313,356		(3,441	)
	Total temporarily - impaired debt securities available for sale	$	3,595,354	$	(92,244	)	$	227,554		$	(11,471	)	$	3,822,908	$	(103,715	)
Securities Held to Maturity	'
	The table below provides detailed information for securities held to maturity at March 31, 2014 and December 31, 2013 (in thousands):
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
	March 31, 2014	Cost		Gains			Losses			Value
	State and political subdivisions	$	219,724	$	17,174		$	—		$	236,898
	December 31, 2013
	State and political subdivisions	$	209,770	$	21,740		$	—		$	231,510
Schedule of Federal Reserve Bank Stock and Other Securities	'
	The table below provides detailed information for Federal Reserve Bank stock and other securities at March 31, 2014 and December 31, 2013(in thousands):
				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	March 31, 2014
	Federal Reserve Bank stock	$	16,279	$	—		$	—		$	16,279
	Other securities – marketable		—		17,385			—			17,385
	Other securities – non-marketable		18,427		2,460			—			20,887
	Total Federal Reserve Bank stock and other	$	34,706	$	19,845		$	—		$	54,551
	December 31, 2013
	Federal Reserve Bank stock	$	16,279	$	—		$	—		$	16,279
	Other securities – marketable		20		16,612			—			16,632
	Other securities – non-marketable		17,139		432			—			17,571
	Total Federal Reserve Bank stock and other	$	33,438	$	17,044		$	—		$	50,482
Available-for-sale Securities [Member]	'
Contractual Maturity Information	'
	The following table presents contractual maturity information for securities available for sale at March 31, 2014 (in thousands):
		Amortized		Fair
		Cost		Value
	Due in 1 year or less	$	469,340	$	471,680
	Due after 1 year through 5 years		2,303,020		2,314,245
	Due after 5 years through 10 years		729,845		726,462
	Due after 10 years		145,881		139,158
	Total		3,648,086		3,651,545
	Mortgage-backed securities		3,108,155		3,083,386
	Total securities available for sale	$	6,756,241	$	6,734,931
Held-to-maturity Securities [Member]	'
Contractual Maturity Information	'
	The following table presents contractual maturity information for securities held to maturity at March 31, 2014 (in thousands):
		Amortized		Fair
		Cost		Value
	Due in 1 year or less	$	61	$	66
	Due after 1 year through 5 years		27,251		29,381
	Due after 5 years through 10 years		98,703		106,418
	Due after 10 years		93,709		101,033
	Total securities held to maturity	$	219,724	$	236,898

Goodwill_and_Other_Intangibles1

Goodwill and Other Intangibles (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013 by reportable segment are as follows (in thousands):
		Bank		Institutional		Asset		Total
				Investment		Servicing
				Management
	Balances as of January 1, 2013	$	142,753	$	47,529	$	19,476	$	209,758
	Balances as of December 31, 2013	$	142,753	$	47,529	$	19,476	$	209,758
	Balances as of January 1, 2014	$	142,753	$	47,529	$	19,476	$	209,758
	Balances as of March 31, 2014	$	142,753	$	47,529	$	19,476	$	209,758
Changes in Finite-Lived Intangible Assets	'
	Following are the finite-lived intangible assets that continue to be subject to amortization as of March 31, 2014 and December 31, 2013 (in thousands):
		As of March 31, 2014
		Gross		Accumulated		Net
		Carrying		Amortization		Carrying
		Amount				Amount
	Core deposit intangible assets	$	36,497	$	31,946	$	4,551
	Customer relationships		103,960		56,835		47,125
	Other intangible assets		3,247		2,440		807
	Total intangible assets	$	143,704	$	91,221	$	52,483
		As of December 31, 2013
		Gross		Accumulated		Net
		Carrying		Amortization		Carrying
		Amount				Amount
	Core deposit intangible assets	$	36,497	$	31,674	$	4,823
	Customer relationships		103,960		54,062		49,898
	Other intangible assets		3,247		2,383		864
	Total intangible assets	$	143,704	$	88,119	$	55,585
Aggregate Amortization Expense Recognized	'
	Following is the aggregate amortization expense recognized in each period (in thousands):
		Three Months Ended
		March 31,
		2014		2013
	Aggregate amortization expense	$	3,102	$	3,456
Estimated Amortization Expense of Intangible Assets	'
	Estimated amortization expense of intangible assets on future years (in thousands):
	For the nine months ending December 31, 2014	$	9,044
	For the year ending December 31, 2015		9,550
	For the year ending December 31, 2016		8,342
	For the year ending December 31, 2017		7,098
	For the year ending December 31, 2018		4,908

Commitments_Contingencies_and_1

Commitments, Contingencies and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2014
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,
		2014		2013
	Commitments to extend credit for loans (excluding credit card loans)	$	2,793,554	$	2,690,268
	Commitments to extend credit under credit card loans		2,314,445		2,215,278
	Commercial letters of credit		1,562		5,949
	Standby letters of credit		387,889		356,054
	Futures contracts		4,500		—
	Forward foreign exchange contracts		16,802		21,525
	Spot foreign exchange contracts		1,342		8,001

Business_Segment_Reporting_Tab

Business Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Financial Results	'
	Segment financial results were as follows (in thousands):
		Three Months Ended March 31, 2014
		Bank		Payment		Institutional			Asset		Total
				Solutions		Investment			Servicing
						Management
	Net interest income	$	71,121	$	12,388	$	(2	)	$	1,938	$	85,445
	Provision for loan losses		2,426		2,074		—			—		4,500
	Noninterest income		47,420		20,235		34,095			21,214		122,964
	Noninterest expense		107,753		21,015		25,894			17,579		172,241
	Income before taxes		8,362		9,534		8,199			5,573		31,668
	Income tax expense		1,942		2,609		2,184			1,520		8,255
	Net income	$	6,420	$	6,925	$	6,015		$	4,053	$	23,413
	Average assets	$	12,299,000	$	1,952,000	$	74,000		$	2,179,000	$	16,504,000
		Three Months Ended March 31, 2013
		Bank		Payment		Institutional			Asset		Total
				Solutions		Investment			Servicing
						Management
	Net interest income	$	67,260	$	11,548	$	—		$	675	$	79,483
	Provision for loan losses		309		1,691		—			—		2,000
	Noninterest income		52,748		19,437		28,552			20,279		121,016
	Noninterest expense		91,536		20,117		18,845			19,880		150,378
	Income before taxes		28,163		9,177		9,707			1,074		48,121
	Income tax expense		7,705		2,534		2,667			274		13,180
	Net income	$	20,458	$	6,643	$	7,040		$	800	$	34,941
	Average assets	$	11,306,000	$	1,698,000	$	78,000		$	1,701,000	$	14,783,000

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013 (in thousands):
		Asset Derivatives					Liability Derivatives
	Fair value	March 31,			December 31,		March 31,		December 31,
		2014			2013		2014		2013
	Interest Rate Products:
	Derivatives not designated as hedging instruments	$	3,378		$	2,442	$	3,365	$	2,346
	Derivatives designated as hedging instruments		—			76		43		—
	Total	$	3,378		$	2,518	$	3,408	$	2,346
Summary of Amount of Gain (Loss) Recognized in Other Non-Interest Expense in Consolidated Statements of Income Related to Derivative Asset and Liability	'
	This table provides a summary of the amount of gain (loss) recognized in other noninterest expense in the Consolidated Statements of Income related to the Company’s derivative asset and liability as of March 31, 2014 and March 31, 2013 (in thousands):
		Amount of Gain (Loss) Recognized
		For the Year Ended
		March 31,
		2014			2013
	Interest Rate Products
	Derivatives not designated as hedging instruments	$	(83	)	$	106
	Total	$	(83	)	$	106
	Interest Rate Products
	Derivatives designated as hedging instruments
	Fair value adjustments on derivatives	$	(119	)	$	—
	Fair value adjustments on hedged items		109			—
	Total	$	(10	)	$	—

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013 (in thousands):
		Fair Value Measurement As of March 31, 2014
	Description	March 31,			Quoted Prices in			Significant Other			Significant
		2014			Active Markets for			Observable			Unobservable
					Identical Assets			Inputs (Level 2)			Inputs (Level 3)
					(Level 1)
	Assets
	U.S. Treasury	$	400		$	400		$	—		$	—
	U.S. Agencies		—			—			—			—
	Mortgage-backed		7,406			—			7,406			—
	State and political subdivisions		5,273			—			5,273			—
	Trading – other		29,976			29,979			(3	)		—
	Trading securities		43,055			30,379			12,676			—
	U.S. Treasury		251,790			251,790			—			—
	U.S. Agencies		1,019,625			—			1,019,625			—
	Mortgage-backed		3,083,386			—			3,083,386			—
	State and political subdivisions		1,957,572			—			1,957,572			—
	Corporates		422,558			422,558			—			—
	Available for sale securities		6,734,931			674,348			6,060,583			—
	Company-owned life insurance		20,058			—			20,058			—
	Derivatives		3,378			—			3,378			—
	Total	$	6,801,422		$	704,727		$	6,096,695		$	—
	Liabilities
	Deferred compensation	$	24,106		$	24,106		$	—		$	—
	Contingent consideration liability		44,700			—			—			44,700
	Derivatives		3,408			—			3,408			—
	Total	$	72,214		$	24,106		$	3,408		$	44,700
		Fair Value Measurement as of December 31, 2013
	Description	December 31,			Quoted Prices in			Significant Other			Significant
		2013			Active Markets			Observable			Unobservable
					for Identical			Inputs (Level 2)			Inputs (Level 3)
					Assets (Level 1)
	Assets
	U.S. Treasury	$	400		$	400		$	—		$	—
	U.S. Agencies		—			—			—			—
	Mortgage-backed		515			—			515			—
	State and political subdivisions		3,072			—			3,072			—
	Trading – other		24,477			24,477			—			—
	Trading securities		28,464			24,877			3,587			—
	U.S. Treasury		110,200			110,200			—			—
	U.S. Agencies		1,257,663			—			1,257,663			—
	Mortgage-backed		2,944,566			—			2,944,566			—
	State and political subdivisions		1,995,246			—			1,995,246			—
	Corporates		454,736			454,736			—			—
	Available for sale securities		6,762,411			564,936			6,197,475			—
	Company-owned life insurance		19,619			—			19,619			—
	Derivatives		2,518			—			2,518			—
	Total	$	6,813,012		$	589,813		$	6,223,199		$	—
	Liabilities
	Deferred compensation		19,825		$	19,825		$	—		$	—
	Contingent consideration liability		46,201			—			—			46,201
	Derivatives		2,346			—			2,346			—
	Total	$	68,372		$	19,825		$	2,346		$	46,201
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,
		2014			2013
	Beginning Balance	$	46,201		$	51,163
	Payment of contingent considerations on acquisitions		(5,975	)		(4,899	)
	Income from fair value adjustments		—			(138	)
	Expense from fair value adjustments		4,474			3,316
	Ending Balance	$	44,700		$	49,442
Quantitative Information about Significant Unobservable Input used in Fair Value Measurement for Contingent Consideration Liability Measured at Fair Value on Recurring Basis	'
	The following table presents certain quantitative information about the significant unobservable input used in the fair value measurement for the contingent consideration liability measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
	Description	Valuation Techniques		Significant	Range
				Unobservable Inputs
	Liabilities
	Contingent consideration liability	Discounted cash flows		Revenue and expense growth percentage	1% - 78%
Assets Measured at Fair Value on Non-Recurring Basis	'
	Assets measured at fair value on a non-recurring basis as of March 31, 2014 and December 31, 2013 (in thousands):
		Fair Value Measurement at March 31, 2014 Using
	Description	March 31,			Quoted Prices			Significant			Significant		Total
		2014			in Active			Other			Unobservable		Gains
					Markets for			Observable			Inputs		(Losses)
					Identical			Inputs			(Level 3)		Recognized
					Assets			(Level 2)					During the
					(Level 1)								Three Months
													Ended
													March 31
	Impaired loans	$	17,301		$	—		$	—		$	17,301	$	(8	)
	Other real estate owned		35			—			—			35	$	—
	Total	$	17,336		$	—		$	—		$	17,336	$	(8	)
		Fair Value Measurement at December 31, 2013 Using
	Description	December 31,			Quoted Prices			Significant			Significant		Total
		2013			in Active			Other			Unobservable		Gains
					Markets for			Observable			Inputs		(Losses)
					Identical			Inputs			(Level 3)		Recognized
					Assets			(Level 2)					During the
					(Level 1)								Twelve Months
													Ended
													December 31
	Impaired loans	$	15,496		$	—		$	—		$	15,496	$	(2,496	)
	Other real estate owned		329			—			—			329		(125	)
	Total	$	15,825		$	—		$	—		$	15,825	$	(2,621	)
Estimated Fair Value of Financial Instruments	'
	The estimated fair value of the Company’s financial instruments at March, 31, 2014 and December 31, 2013 are as follows (in millions):
		Fair Value Measurement at March 31, 2014 Using
		Carrying			Quoted Prices			Significant			Significant		Total
		Amount			in Active			Other			Unobservable		Estimated
					Markets for			Observable			Inputs		Fair
					Identical			Inputs			(Level 3)		Value
					Assets			(Level 2)
					(Level 1)
	FINANCIAL ASSETS
	Securities held to maturity	$	219.7		$	—		$	236.9		$	—	$	236.9
	Federal Reserve Bank and other		54.6			—			54.6			—		54.6
	Loans (exclusive of allowance for loan loss)		6,760.20			—			6,799.60			—		6,799.60
	FINANCIAL LIABILITIES
	Time deposits		1,214.70			—			1,212.90			—		1,212.90
	Long-term debt		5.8			—			6			—		6
	OFF-BALANCE SHEET ARRANGEMENTS
	Commitments to extend credit for loans													1.5
	Commercial letters of credit													0.1
	Standby letters of credit													0.5
		Fair Value Measurement at December 31, 2013 Using
		Carrying			Quoted Prices			Significant			Significant		Total
		Amount			in Active			Other			Unobservable		Estimated
					Markets for			Observable			Inputs		Fair
					Identical			Inputs			(Level 3)		Value
					Assets			(Level 2)
					(Level 1)
	FINANCIAL ASSETS
	Securities held to maturity	$	209.8		$	—		$	231.5		$	—	$	231.5
	Federal Reserve Bank and other s		50.5			—			50.5			—		50.5
	Loans (exclusive of allowance for loan loss)		6,521.90			—			6,571.60			—		6,571.60
	FINANCIAL LIABILITIES
	Time deposits		1,449.60			—			1,449.40			—		1,449.40
	Long-term debt		5.1			—			4.5			—		4.5
	OFF-BALANCE SHEET ARRANGEMENTS
	Commitments to extend credit for loans													6
	Commercial letters of credit													0.1
	Standby letters of credit													2

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accounting Policies [Abstract]	'	'
Due from certificates of deposit	$82.90	$22.90
Dilutive effect of common stock issuable upon exercise of options, shares	640,622	418,210
Anti-dilutive shares	258,254	280,611

Summary_of_Cash_and_Cash_Equiv

Summary of Cash and Cash Equivalents (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounting Policies [Abstract]	'	'	'	'
Due from the Federal Reserve	$684,947	'	$1,608,279	'
Cash and due from banks	593,956	521,001	319,535	'
Cash and cash equivalents at end of period	$1,278,903	$2,582,428	$1,927,814	$1,366,394

Summary_of_Loan_Classes_and_Ag

Summary of Loan Classes and Aging of Past Due Loans (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	$15,862	$13,360	'
Greater than 90 Days Past Due and Accruing	5,101	3,218	'
Non- Accrual Loans	30,153	30,706	'
Total Past Due	51,116	47,284	'
Current	6,707,973	6,473,228	'
Total Loans	6,759,089	6,520,512	6,010,681
Commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	3,478	2,107	'
Greater than 90 Days Past Due and Accruing	2,023	135	'
Non- Accrual Loans	8,611	8,042	'
Total Past Due	14,112	10,284	'
Current	3,475,917	3,291,219	'
Total Loans	3,490,029	3,301,503	'
Commercial - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	368	362	'
Greater than 90 Days Past Due and Accruing	126	82	'
Non- Accrual Loans	25	38	'
Total Past Due	519	482	'
Current	120,835	102,788	'
Total Loans	121,354	103,270	'
Real estate - construction [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	768	186	'
Greater than 90 Days Past Due and Accruing	'	'	'
Non- Accrual Loans	921	934	'
Total Past Due	1,689	1,120	'
Current	184,271	151,755	'
Total Loans	185,960	152,875	'
Real estate - commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	2,660	3,611	'
Greater than 90 Days Past Due and Accruing	'	344	'
Non- Accrual Loans	18,104	19,213	'
Total Past Due	20,764	23,168	'
Current	1,690,106	1,678,983	'
Total Loans	1,710,870	1,702,151	'
Real estate - residential [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	1,114	1,257	'
Greater than 90 Days Past Due and Accruing	'	13	'
Non- Accrual Loans	946	868	'
Total Past Due	2,060	2,138	'
Current	292,345	287,218	'
Total Loans	294,405	289,356	'
Real estate - Home Equity Line of Credit [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	1,983	880	'
Greater than 90 Days Past Due and Accruing	'	6	'
Non- Accrual Loans	325	210	'
Total Past Due	2,308	1,096	'
Current	568,121	565,032	'
Total Loans	570,429	566,128	'
Consumer - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	2,391	3,230	'
Greater than 90 Days Past Due and Accruing	2,853	2,448	'
Non- Accrual Loans	869	1,031	'
Total Past Due	6,113	6,709	'
Current	294,183	311,627	'
Total Loans	300,296	318,336	'
Consumer - other [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	2,943	1,727	'
Greater than 90 Days Past Due and Accruing	99	190	'
Non- Accrual Loans	352	370	'
Total Past Due	3,394	2,287	'
Current	58,299	60,625	'
Total Loans	61,693	62,912	'
Leases [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	157	'	'
Greater than 90 Days Past Due and Accruing	'	'	'
Non- Accrual Loans	'	'	'
Total Past Due	157	'	'
Current	23,896	23,981	'
Total Loans	$24,053	$23,981	$19,901

Loans_and_Allowance_for_Loan_L2

Loans and Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Receivables [Abstract]	'	'	'
Proceeds from sales of loans held for sale	$11,983,000	$37,326,000	'
Non-accrual loans	30,153,000	'	30,706,000
Restructured loans	12,100,000	'	12,100,000
Loans 90 days past due and accruing	5,101,000	'	3,218,000
Commitments to lend to borrowers with loan modifications classified as TDR's	$279,000	'	'

Credit_Risk_Profile_by_Risk_Ra

Credit Risk Profile by Risk Rating (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	$6,759,089	$6,520,512	$6,010,681
Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	3,490,029	3,301,503	'
Commercial [Member] | Non-watch list [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	3,229,699	3,041,224	'
Commercial [Member] | Watch [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	107,824	110,932	'
Commercial [Member] | Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	74,830	78,064	'
Commercial [Member] | Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	77,676	71,283	'
Real estate - construction [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	185,960	152,875	'
Real estate - construction [Member] | Non-watch list [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	183,855	151,359	'
Real estate - construction [Member] | Watch [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	801	210	'
Real estate - construction [Member] | Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	'	'	'
Real estate - construction [Member] | Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	1,304	1,306	'
Real estate - commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	1,710,870	1,702,151	'
Real estate - commercial [Member] | Non-watch list [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	1,565,623	1,565,894	'
Real estate - commercial [Member] | Watch [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	79,620	76,647	'
Real estate - commercial [Member] | Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	19,644	19,876	'
Real estate - commercial [Member] | Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	$45,983	$39,734	'

Credit_Risk_Profile_Based_on_P

Credit Risk Profile Based on Payment Activity (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	$6,759,089	$6,520,512	$6,010,681
Commercial - credit card [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	121,354	103,270	'
Commercial - credit card [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	121,329	103,232	'
Commercial - credit card [Member] | Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	25	38	'
Real estate - residential [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	294,405	289,356	'
Real estate - residential [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	293,459	288,488	'
Real estate - residential [Member] | Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	946	868	'
Real estate - Home Equity Line of Credit [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	570,429	566,128	'
Real estate - Home Equity Line of Credit [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	570,104	565,918	'
Real estate - Home Equity Line of Credit [Member] | Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	325	210	'
Consumer - credit card [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	300,296	318,336	'
Consumer - credit card [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	299,427	317,305	'
Consumer - credit card [Member] | Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	869	1,031	'
Consumer - other [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	61,693	62,912	'
Consumer - other [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	61,341	62,542	'
Consumer - other [Member] | Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	352	370	'
Leases [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	24,053	23,981	19,901
Leases [Member] | Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	24,053	23,981	'
Leases [Member] | Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	'	'	'

Rollforward_of_Allowance_for_L

Rollforward of Allowance for Loan Losses by Portfolio Segment (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Beginning balance	$74,751	$71,426	'
Charge-offs	-4,685	-4,849	'
Recoveries	948	1,304	'
Provision	4,500	2,000	'
Ending Balance	75,514	69,881	'
Ending Balance: individually evaluated for impairment, allowances	4,260	3,515	4,252
Ending Balance: collectively evaluated for impairment, allowances	71,254	66,366	'
Ending Balance: loans	6,759,089	6,010,681	6,520,512
Ending Balance: individually evaluated for impairment, loans	29,276	26,160	'
Ending Balance: collectively evaluated for impairment, loans	6,729,813	5,984,521	'
Commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Beginning balance	48,886	43,390	'
Charge-offs	-1,471	-1,397	'
Recoveries	67	374	'
Provision	881	978	'
Ending Balance	48,363	43,345	'
Ending Balance: individually evaluated for impairment, allowances	2,541	3,206	'
Ending Balance: collectively evaluated for impairment, allowances	45,822	40,139	'
Ending Balance: loans	3,611,383	3,305,175	'
Ending Balance: individually evaluated for impairment, loans	14,719	15,974	'
Ending Balance: collectively evaluated for impairment, loans	3,596,664	3,289,201	'
Real estate [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Beginning balance	15,342	15,506	'
Charge-offs	-126	-195	'
Recoveries	9	9	'
Provision	866	-374	'
Ending Balance	16,091	14,946	'
Ending Balance: individually evaluated for impairment, allowances	1,719	309	'
Ending Balance: collectively evaluated for impairment, allowances	14,372	14,637	'
Ending Balance: loans	2,761,664	2,320,388	'
Ending Balance: individually evaluated for impairment, loans	14,555	10,140	'
Ending Balance: collectively evaluated for impairment, loans	2,747,109	2,310,248	'
Consumer [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Beginning balance	10,447	12,470	'
Charge-offs	-3,088	-3,257	'
Recoveries	872	921	'
Provision	2,753	1,395	'
Ending Balance	10,984	11,529	'
Ending Balance: individually evaluated for impairment, allowances	'	'	'
Ending Balance: collectively evaluated for impairment, allowances	10,984	11,529	'
Ending Balance: loans	361,989	365,217	'
Ending Balance: individually evaluated for impairment, loans	2	46	'
Ending Balance: collectively evaluated for impairment, loans	361,987	365,171	'
Leases [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Beginning balance	76	60	'
Charge-offs	'	'	'
Recoveries	'	'	'
Provision	'	1	'
Ending Balance	76	61	'
Ending Balance: individually evaluated for impairment, allowances	'	'	'
Ending Balance: collectively evaluated for impairment, allowances	76	61	'
Ending Balance: loans	24,053	19,901	23,981
Ending Balance: individually evaluated for impairment, loans	'	'	'
Ending Balance: collectively evaluated for impairment, loans	$24,053	$19,901	'

Analysis_of_Impaired_Loans_by_

Analysis of Impaired Loans by Class (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	$34,671	$34,650	'
Recorded Investment with No Allowance	7,715	10,441	'
Recorded Investment with Allowance	21,561	19,748	'
Total Recorded Investment	29,276	30,189	'
Related Allowance	4,260	4,252	3,515
Average Recorded Investment	29,733	27,639	'
Commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	17,684	17,227	'
Recorded Investment with No Allowance	2,855	3,228	'
Recorded Investment with Allowance	11,864	11,407	'
Total Recorded Investment	14,719	14,635	'
Related Allowance	2,541	2,882	'
Average Recorded Investment	14,678	14,791	'
Commercial - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	'	'	'
Recorded Investment with No Allowance	'	'	'
Recorded Investment with Allowance	'	'	'
Total Recorded Investment	'	'	'
Related Allowance	'	'	'
Average Recorded Investment	'	'	'
Real estate - construction [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	1,403	1,408	'
Recorded Investment with No Allowance	798	810	'
Recorded Investment with Allowance	123	123	'
Total Recorded Investment	921	933	'
Related Allowance	98	'	'
Average Recorded Investment	927	1,186	'
Real estate - commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	14,360	14,686	'
Recorded Investment with No Allowance	3,052	5,305	'
Recorded Investment with Allowance	9,574	8,218	'
Total Recorded Investment	12,626	13,523	'
Related Allowance	1,621	94	'
Average Recorded Investment	13,074	10,506	'
Real estate - residential [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	1,221	1,317	'
Recorded Investment with No Allowance	1,008	1,087	'
Recorded Investment with Allowance	'	'	'
Total Recorded Investment	1,008	1,087	'
Related Allowance	'	1,276	'
Average Recorded Investment	1,048	1,122	'
Real estate - Home Equity Line of Credit [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	'	'	'
Recorded Investment with No Allowance	'	'	'
Recorded Investment with Allowance	'	'	'
Total Recorded Investment	'	'	'
Related Allowance	'	'	'
Average Recorded Investment	'	'	'
Consumer - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	'	'	'
Recorded Investment with No Allowance	'	'	'
Recorded Investment with Allowance	'	'	'
Total Recorded Investment	'	'	'
Related Allowance	'	'	'
Average Recorded Investment	'	'	'
Consumer - other [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	3	12	'
Recorded Investment with No Allowance	2	11	'
Recorded Investment with Allowance	'	'	'
Total Recorded Investment	2	11	'
Related Allowance	'	'	'
Average Recorded Investment	6	34	'
Leases [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	'	'	'
Recorded Investment with No Allowance	'	'	'
Recorded Investment with Allowance	'	'	'
Total Recorded Investment	'	'	'
Related Allowance	'	'	'
Average Recorded Investment	'	'	'

Troubled_Debt_Restructurings_b

Troubled Debt Restructurings by Class (Detail) (Troubled Debt Restructuring [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	2
Pre-Modification Outstanding Recorded Investment	$469	$1,408
Post-Modification Outstanding Recorded Investment	469	1,407
Commercial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	'
Pre-Modification Outstanding Recorded Investment	469	'
Post-Modification Outstanding Recorded Investment	469	'
Commercial - credit card [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Real estate - construction [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Real estate - commercial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	2
Pre-Modification Outstanding Recorded Investment	'	1,408
Post-Modification Outstanding Recorded Investment	'	1,407
Real estate - residential [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Real estate - Home Equity Line of Credit [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Consumer - credit card [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Consumer - other [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Leases [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'

Securities_Available_for_Sale_

Securities Available for Sale (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	$6,756,241	$6,814,712
Securities available for sale, Gross Unrealized Gains	50,230	51,414
Securities available for sale, Gross Unrealized Losses	-71,540	-103,715
Total securities available for sale, Fair Value	6,734,931	6,762,411
U.S. Treasury [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	252,195	110,789
Securities available for sale, Gross Unrealized Gains	320	284
Securities available for sale, Gross Unrealized Losses	-725	-873
Total securities available for sale, Fair Value	251,790	110,200
U.S. Agencies [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	1,019,869	1,258,176
Securities available for sale, Gross Unrealized Gains	1,797	2,793
Securities available for sale, Gross Unrealized Losses	-2,041	-3,306
Total securities available for sale, Fair Value	1,019,625	1,257,663
Mortgage-backed [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	3,108,155	2,984,963
Securities available for sale, Gross Unrealized Gains	23,477	23,942
Securities available for sale, Gross Unrealized Losses	-48,246	-64,339
Total securities available for sale, Fair Value	3,083,386	2,944,566
State and political subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	1,951,916	2,003,509
Securities available for sale, Gross Unrealized Gains	24,097	23,493
Securities available for sale, Gross Unrealized Losses	-18,441	-31,756
Total securities available for sale, Fair Value	1,957,572	1,995,246
Corporates [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	424,106	457,275
Securities available for sale, Gross Unrealized Gains	539	902
Securities available for sale, Gross Unrealized Losses	-2,087	-3,441
Total securities available for sale, Fair Value	$422,558	$454,736

Summary_of_Contractual_Maturit

Summary of Contractual Maturity Information for Securities Available for Sale (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments Debt And Equity Securities [Abstract]	'	'
Due in 1 year or less, Amortized Cost	$469,340	'
Due after 1 year through 5 years, Amortized Cost	2,303,020	'
Due after 5 years through 10 years, Amortized Cost	729,845	'
Due after 10 years, Amortized Cost	145,881	'
Total, Amortized Cost	3,648,086	'
Mortgage-backed securities, Amortized Cost	3,108,155	'
Total securities available for sale, Amortized Cost	6,756,241	6,814,712
Due in 1 year or less, Fair Value	471,680	'
Due after 1 year through 5 years, Fair Value	2,314,245	'
Due after 5 years through 10 years, Fair Value	726,462	'
Due after 10 years, Fair Value	139,158	'
Total, Fair Value	3,651,545	'
Mortgage-backed securities, Fair Value	3,083,386	'
Total securities available for sale, Fair Value	$6,734,931	$6,762,411

Securities_Additional_Informat

Securities - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Proceeds from sales of securities available for sale	$77,583,000	$333,912,000	'
Gross realized gains from securities	1,500,000	5,900,000	'
Gross realized losses from securities	11,000	37,000	'
Sales of securities held to maturity	0	0	'
Unrealized gains on trading securities	300,000	200,000	'
Fair value of marketable securities	17,400,000	'	16,600,000
Fair value of non-marketable securities	6,300,000	'	4,700,000
Us Government and Other Public Deposit [Member]	'	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Pledged securities for deposits	5,400,000,000	'	5,900,000,000
Federal Reserve Discount Window [Member]	'	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Pledged securities for deposits	$1,600,000,000	'	$1,700,000,000

Gross_Unrealized_Losses_and_Fa

Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	$3,228,573	$3,595,354
Less than 12 months, Unrealized Losses	-59,518	-92,244
12 months or more, Fair Value	313,751	227,554
12 months or more, Unrealized Losses	-12,022	-11,471
Total Fair Value	3,542,324	3,822,908
Total Unrealized Losses	-71,540	-103,715
U.S. Treasury [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	103,744	39,822
Less than 12 months, Unrealized Losses	-725	-873
12 months or more, Fair Value	'	'
12 months or more, Unrealized Losses	'	'
Total Fair Value	103,744	39,822
Total Unrealized Losses	-725	-873
U.S. Agencies [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	504,992	675,509
Less than 12 months, Unrealized Losses	-1,612	-3,130
12 months or more, Fair Value	33,680	9,824
12 months or more, Unrealized Losses	-429	-176
Total Fair Value	538,672	685,333
Total Unrealized Losses	-2,041	-3,306
Mortgage-backed [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	1,824,634	1,945,964
Less than 12 months, Unrealized Losses	-42,933	-60,719
12 months or more, Fair Value	127,158	89,147
12 months or more, Unrealized Losses	-5,313	-3,620
Total Fair Value	1,951,792	2,035,111
Total Unrealized Losses	-48,246	-64,339
State and political subdivisions [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	600,148	662,225
Less than 12 months, Unrealized Losses	-12,825	-25,064
12 months or more, Fair Value	109,243	87,061
12 months or more, Unrealized Losses	-5,616	-6,692
Total Fair Value	709,391	749,286
Total Unrealized Losses	-18,441	-31,756
Corporates [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	195,055	271,834
Less than 12 months, Unrealized Losses	-1,423	-2,458
12 months or more, Fair Value	43,670	41,522
12 months or more, Unrealized Losses	-664	-983
Total Fair Value	238,725	313,356
Total Unrealized Losses	($2,087)	($3,441)

Securities_Held_to_Maturity_De

Securities Held to Maturity (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'	'
Held to Maturity, Amortized Cost	$219,724	$209,770
Held to Maturity, Fair value	236,898	231,510
State and political subdivisions [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Held to Maturity, Amortized Cost	219,724	209,770
Held to Maturity, Gross Unrealized Gains	17,174	21,740
Held to Maturity, Gross Unrealized Losses	'	'
Held to Maturity, Fair value	$236,898	$231,510

Contractual_Maturity_Informati

Contractual Maturity Information for Securities Held to Maturity (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments Debt And Equity Securities [Abstract]	'	'
Due in 1 year or less, Amortized Cost	$61	'
Due after 1 year through 5 years, Amortized Cost	27,251	'
Due after 5 years through 10 years, Amortized Cost	98,703	'
Due after 10 years, Amortized Cost	93,709	'
Total securities held to maturity, Amortized Cost	219,724	209,770
Due in 1 year or less, Fair Value	66	'
Due after 1 year through 5 years, Fair Value	29,381	'
Due after 5 years through 10 years, Fair Value	106,418	'
Due after 10 years, Fair Value	101,033	'
Held to Maturity, Fair value	$236,898	$231,510

Schedule_of_Federal_Reserve_Ba

Schedule of Federal Reserve Bank Stock and Other Securities (Detail) (Federal Reserve Bank Stock and Other Securities [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	$34,706	$33,438
Gross Unrealized Gains	19,845	17,044
Gross Unrealized Losses	'	'
Fair Value	54,551	50,482
Other securities - non-marketable [Member]	'	'
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	18,427	17,139
Gross Unrealized Gains	2,460	432
Gross Unrealized Losses	'	'
Fair Value	20,887	17,571
Other securities - marketable [Member]	'	'
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	'	20
Gross Unrealized Gains	17,385	16,612
Gross Unrealized Losses	'	'
Fair Value	17,385	16,632
Federal Reserve Bank Stock [Member]	'	'
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	16,279	16,279
Gross Unrealized Gains	'	'
Gross Unrealized Losses	'	'
Fair Value	$16,279	$16,279

Changes_in_Carrying_Amount_of_

Changes in Carrying Amount of Goodwill (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Goodwill And Other Intangible Assets [Line Items]	'	'	'
Beginning Balance	$209,758	$209,758	$209,758
Ending Balance	209,758	209,758	209,758
Bank [Member]	'	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'	'
Beginning Balance	142,753	142,753	142,753
Ending Balance	142,753	142,753	142,753
Institutional Investment Management [Member]	'	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'	'
Beginning Balance	47,529	47,529	47,529
Ending Balance	47,529	47,529	47,529
Asset Servicing [Member]	'	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'	'
Beginning Balance	19,476	19,476	19,476
Ending Balance	$19,476	$19,476	$19,476

Changes_in_FiniteLived_Intangi

Changes in Finite-Lived Intangible Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$143,704	$143,704
Accumulated Amortization	91,221	88,119
Net Carrying Amount	52,483	55,585
Core deposit intangible assets [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	36,497	36,497
Accumulated Amortization	31,946	31,674
Net Carrying Amount	4,551	4,823
Customer relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	103,960	103,960
Accumulated Amortization	56,835	54,062
Net Carrying Amount	47,125	49,898
Other intangible assets [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	3,247	3,247
Accumulated Amortization	2,440	2,383
Net Carrying Amount	$807	$864

Aggregate_Amortization_Expense

Aggregate Amortization Expense Recognized (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Aggregate amortization expense	$3,102	$3,456

Estimated_Amortization_Expense

Estimated Amortization Expense of Intangible Assets (Detail) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
For the nine months ending December 31, 2014	$9,044
For the year ending December 31, 2015	9,550
For the year ending December 31, 2016	8,342
For the year ending December 31, 2017	7,098
For the year ending December 31, 2018	$4,908

Notional_Amount_of_OffBalance_

Notional Amount of Off-Balance Sheet Financial Instruments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
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	$2,793,554	$2,690,268
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	2,314,445	2,215,278
Commercial Letters of Credit [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	1,562	5,949
Standby Letters of Credit [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	387,889	356,054
Futures Contracts [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	4,500	'
Forward Foreign Exchange Contracts [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	16,802	21,525
Spot Foreign Exchange Contracts [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	$1,342	$8,001

Commitments_Contingencies_and_2

Commitments, Contingencies and Guarantees - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	Mar. 28, 2014	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'	'
Unrealized gain on equity method investments	$16,600,000	'
Contingency reserve	'	$15,000,000

Business_Segment_Reporting_Add

Business Segment Reporting - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014
	Segment
Segment Reporting [Abstract]	'
Number of reportable segments	4

Schedule_of_Segment_Financial_

Schedule of Segment Financial Results (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]	'	'
Net interest income	$85,445	$79,483
Provision for loan losses	4,500	2,000
Noninterest income	122,964	121,016
Noninterest expense	172,241	150,378
Income before income taxes	31,668	48,121
Income tax expense	8,255	13,180
Net income	23,413	34,941
Average assets	16,504,000	14,783,000
Bank [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net interest income	71,121	67,260
Provision for loan losses	2,426	309
Noninterest income	47,420	52,748
Noninterest expense	107,753	91,536
Income before income taxes	8,362	28,163
Income tax expense	1,942	7,705
Net income	6,420	20,458
Average assets	12,299,000	11,306,000
Payment Solutions [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net interest income	12,388	11,548
Provision for loan losses	2,074	1,691
Noninterest income	20,235	19,437
Noninterest expense	21,015	20,117
Income before income taxes	9,534	9,177
Income tax expense	2,609	2,534
Net income	6,925	6,643
Average assets	1,952,000	1,698,000
Institutional Investment Management [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net interest income	-2	'
Provision for loan losses	'	'
Noninterest income	34,095	28,552
Noninterest expense	25,894	18,845
Income before income taxes	8,199	9,707
Income tax expense	2,184	2,667
Net income	6,015	7,040
Average assets	74,000	78,000
Asset Servicing [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Net interest income	1,938	675
Provision for loan losses	'	'
Noninterest income	21,214	20,279
Noninterest expense	17,579	19,880
Income before income taxes	5,573	1,074
Income tax expense	1,520	274
Net income	4,053	800
Average assets	$2,179,000	$1,701,000

Summary_of_Fair_Value_of_Deriv

Summary of Fair Value of Derivative Assets and Liabilities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Asset Derivatives, Fair value	$3,378	$2,518
Liability Derivatives, Fair value	3,408	2,346
Derivatives not Designated as Hedging Instruments [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Asset Derivatives, Fair value	3,378	2,442
Liability Derivatives, Fair value	3,365	2,346
Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Asset Derivatives, Fair value	'	76
Liability Derivatives, Fair value	$43	'

Derivatives_and_Hedging_Activi2

Derivatives and Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
	Derivative
Derivative [Line Items]	'	'
Net loss in interest expense related to hedge ineffectiveness	($10,000)	'
Termination value of derivatives in net liability position	200,000	'
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]	'	'
Derivative [Line Items]	'	'
Notional amount of interest rate swaps	6,800,000	'
Number of interest rate swaps	1	'
Interest Rate Swap [Member] | Derivatives not Designated as Hedging Instruments [Member]	'	'
Derivative [Line Items]	'	'
Notional amount of interest rate swaps	333,500,000	'
Number of interest rate swaps	26	'
Derivatives designated and not designated as hedging instruments	($83,000)	$106,000

Summary_of_Amount_of_Gain_Loss

Summary of Amount of Gain (Loss) Recognized in Other Non-Interest Expense in Consolidated Statements of Income Related to Derivative Asset and Liability (Detail) (Interest rate products [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Derivatives not Designated as Hedging Instruments [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Derivative Instruments	($83)	$106
Designated as Hedging Instrument [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Derivative Instruments	-10	'
Designated as Hedging Instrument [Member] | Fair value adjustments on derivatives [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Derivative Instruments	-119	'
Designated as Hedging Instrument [Member] | Fair value adjustments on hedged items [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Derivative Instruments	$109	'

Assets_and_Liabilities_Measure

Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	$43,055	$28,464	'	'
Available for sale securities	6,734,931	6,762,411	'	'
Derivatives	3,378	2,518	'	'
Contingent consideration liability	44,700	46,201	49,442	51,163
Derivatives	3,408	2,346	'	'
Fair Value Measurement, Recurring [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	43,055	28,464	'	'
Available for sale securities	6,734,931	6,762,411	'	'
Company-owned life insurance	20,058	19,619	'	'
Derivatives	3,378	2,518	'	'
Total	6,801,422	6,813,012	'	'
Deferred compensation	24,106	19,825	'	'
Contingent consideration liability	44,700	46,201	'	'
Derivatives	3,408	2,346	'	'
Total	72,214	68,372	'	'
Fair Value Measurement, Recurring [Member] | Trading - other [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	29,976	24,477	'	'
Fair Value Measurement, Recurring [Member] | U.S. Treasury [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	400	400	'	'
Available for sale securities	251,790	110,200	'	'
Fair Value Measurement, Recurring [Member] | U.S. Agencies [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	1,019,625	1,257,663	'	'
Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	7,406	515	'	'
Available for sale securities	3,083,386	2,944,566	'	'
Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	5,273	3,072	'	'
Available for sale securities	1,957,572	1,995,246	'	'
Fair Value Measurement, Recurring [Member] | Corporates [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Available for sale securities	422,558	454,736	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	30,379	24,877	'	'
Available for sale securities	674,348	564,936	'	'
Company-owned life insurance	'	'	'	'
Derivatives	'	'	'	'
Total	704,727	589,813	'	'
Deferred compensation	24,106	19,825	'	'
Contingent consideration liability	'	'	'	'
Derivatives	'	'	'	'
Total	24,106	19,825	'	'
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 Basis [Line Items]	'	'	'	'
Trading securities	29,979	24,477	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Treasury [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	400	400	'	'
Available for sale securities	251,790	110,200	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Agencies [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
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 Basis [Line Items]	'	'	'	'
Available for sale securities	422,558	454,736	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	12,676	3,587	'	'
Available for sale securities	6,060,583	6,197,475	'	'
Company-owned life insurance	20,058	19,619	'	'
Derivatives	3,378	2,518	'	'
Total	6,096,695	6,223,199	'	'
Deferred compensation	'	'	'	'
Contingent consideration liability	'	'	'	'
Derivatives	3,408	2,346	'	'
Total	3,408	2,346	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | Trading - other [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	-3	'	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Treasury [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Agencies [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	1,019,625	1,257,663	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	7,406	515	'	'
Available for sale securities	3,083,386	2,944,566	'	'
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 Basis [Line Items]	'	'	'	'
Trading securities	5,273	3,072	'	'
Available for sale securities	1,957,572	1,995,246	'	'
Significant Other Observable Inputs (Level 2) [Member] | Fair Value Measurement, Recurring [Member] | Corporates [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Available for sale securities	'	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Company-owned life insurance	'	'	'	'
Derivatives	'	'	'	'
Total	'	'	'	'
Deferred compensation	'	'	'	'
Contingent consideration liability	44,700	46,201	'	'
Derivatives	'	'	'	'
Total	44,700	46,201	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member] | Trading - other [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Treasury [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member] | U.S. Agencies [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member] | Mortgage-backed [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member] | State and political subdivisions [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	'	'	'	'
Available for sale securities	'	'	'	'
Significant Unobservable Inputs (Level 3) [Member] | Fair Value Measurement, Recurring [Member] | Corporates [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Available for sale securities	'	'	'	'

Reconciliation_of_Beginning_an

Reconciliation of Beginning and Ending Fair Value of Balances of Contingent Consideration Liability (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Fair Value Disclosures [Abstract]	'	'
Beginning Balance	$46,201	$51,163
Payment of contingent considerations on acquisitions	-5,975	-4,899
Income from fair value adjustments	'	-138
Expense from fair value adjustments	4,474	3,316
Ending Balance	$44,700	$49,442

Quantitative_Information_about

Quantitative Information about Significant Unobservable Input used in Fair Value Measurement for Contingent Consideration Liability Measured at Fair Value on Recurring Basis (Detail) (Significant Unobservable Inputs (Level 3) [Member])	3 Months Ended
	Mar. 31, 2014
Minimum [Member]	'
Business Acquisition, Contingent Consideration [Line Items]	'
Revenue and expense growth percentage	1.00%
Maximum [Member]	'
Business Acquisition, Contingent Consideration [Line Items]	'
Revenue and expense growth percentage	78.00%

Assets_Measured_at_Fair_Value_

Assets Measured at Fair Value on Non-Recurring Basis (Detail) (Fair Value, Measurements, Non-Recurring [Member], USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	$17,336	$15,825
Impaired loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	17,301	15,496
Other real estate owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	35	329
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	'
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other real estate owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	'
Significant Other Observable Inputs (Level 2) [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	'
Significant Other Observable Inputs (Level 2) [Member] | Impaired loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	'
Significant Other Observable Inputs (Level 2) [Member] | Other real estate owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	'
Significant Unobservable Inputs (Level 3) [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	17,336	15,825
Significant Unobservable Inputs (Level 3) [Member] | Impaired loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	17,301	15,496
Significant Unobservable Inputs (Level 3) [Member] | Other real estate owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	35	329
Total Gains (Losses) Recognized [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	-8	-2,621
Total Gains (Losses) Recognized [Member] | Impaired loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	-8	-2,496
Total Gains (Losses) Recognized [Member] | Other real estate owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	'	($125)

Estimated_Fair_Value_of_Financ

Estimated Fair Value of Financial Instruments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	$219,724,000	$209,770,000
Federal Reserve Bank and others	54,551,000	50,482,000
Loans (exclusive of allowance for loan loss)	6,760,200,000	6,521,900,000
Time deposits	1,214,700,000	1,449,600,000
Long-term debt	5,815,000	5,055,000
Total Estimated Fair Value [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	236,900,000	231,500,000
Federal Reserve Bank and others	54,600,000	50,500,000
Loans (exclusive of allowance for loan loss)	6,799,600,000	6,571,600,000
Time deposits	1,212,900,000	1,449,400,000
Long-term debt	6,000,000	4,500,000
Commitments to extend credit for loans	1,500,000	6,000,000
Commercial letters of credit	100,000	100,000
Standby letters of credit	500,000	2,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	'	'
Federal Reserve Bank and others	'	'
Loans (exclusive of allowance for loan loss)	'	'
Time deposits	'	'
Long-term debt	'	'
Significant Other Observable Inputs (Level 2) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	236,900,000	231,500,000
Federal Reserve Bank and others	54,600,000	50,500,000
Loans (exclusive of allowance for loan loss)	6,799,600,000	6,571,600,000
Time deposits	1,212,900,000	1,449,400,000
Long-term debt	6,000,000	4,500,000
Significant Unobservable Inputs (Level 3) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	'	'
Federal Reserve Bank and others	'	'
Loans (exclusive of allowance for loan loss)	'	'
Time deposits	'	'
Long-term debt	'	'