UMB Financial (UMBF) 10-Q6 Nov 142014 Q3 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2014	Oct. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
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	'	45,493,346

CONSOLIDATED_BALANCE_SHEETS_Un

CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
ASSETS	'	'
Loans:	$7,103,163	$6,520,512
Allowance for loan losses	-77,316	-74,751
Net loans	7,025,847	6,445,761
Loans held for sale	1,718	1,357
Securities:	'	'
Available for sale	6,759,803	6,762,411
Held to maturity (fair market value of $270,290 and $231,510, respectively)	237,961	209,770
Trading	31,790	28,464
Federal Reserve Bank stock and other	71,192	50,482
Total investment securities	7,100,746	7,051,127
Federal funds sold and securities purchased under agreements to resell	65,255	87,018
Interest-bearing due from banks	986,428	2,093,467
Cash and due from banks	395,956	521,001
Bank premises and equipment, net	257,341	249,689
Accrued income	77,263	78,216
Goodwill	209,758	209,758
Other intangibles	46,966	55,585
Other assets	116,750	118,873
Total assets	16,284,028	16,911,852
Deposits:	'	'
Noninterest-bearing demand	5,467,810	5,189,998
Interest-bearing demand and savings	6,324,535	7,001,126
Time deposits under $100,000	434,863	491,792
Time deposits of $100,000 or more	526,229	957,850
Total deposits	12,753,437	13,640,766
Federal funds purchased and repurchase agreements	1,711,809	1,583,218
Short-term debt	'	107
Long-term debt	7,067	5,055
Accrued expenses and taxes	161,194	153,450
Other liabilities	35,172	23,191
Total liabilities	14,668,679	15,405,787
SHAREHOLDERS' EQUITY	'	'
Common stock, $1.00 par value; 80,000,000 shares authorized; 55,056,730 shares issued; and 45,485,313 and 45,221,237 shares outstanding, respectively	55,057	55,057
Capital surplus	891,353	882,407
Retained earnings	947,664	884,630
Accumulated other comprehensive income (loss)	1,827	-32,640
Treasury stock, 9,571,417 and 9,835,493 shares, at cost, respectively	-280,552	-283,389
Total shareholders' equity	1,615,349	1,506,065
Total liabilities and shareholders' equity	$16,284,028	$16,911,852

CONSOLIDATED_BALANCE_SHEETS_Un1

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Held to maturity, fair market value	$270,290	$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	45,485,313	45,221,237
Treasury stock, shares	9,571,417	9,835,493

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
INTEREST INCOME	'	'	'	'
Loans	$61,636	$59,125	$180,845	$170,459
Securities:	'	'	'	'
Taxable interest	18,884	19,017	56,866	56,325
Tax-exempt interest	9,745	10,338	29,450	30,216
Total securities income	28,629	29,355	86,316	86,541
Federal funds and resell agreements	87	62	166	126
Interest-bearing due from banks	426	276	2,015	1,276
Trading securities	39	278	311	808
Total interest income	90,817	89,096	269,653	259,210
INTEREST EXPENSE	'	'	'	'
Deposits	3,015	3,097	9,166	10,222
Federal funds and repurchase agreements	358	385	1,293	1,443
Other	-82	69	53	190
Total interest expense	3,291	3,551	10,512	11,855
Net interest income	87,526	85,545	259,141	247,355
Provision for loan losses	4,500	6,500	14,000	13,500
Net interest income after provision for loan losses	83,026	79,045	245,141	233,855
NONINTEREST INCOME	'	'	'	'
Trust and securities processing	74,062	68,465	218,982	194,263
Trading and investment banking	3,826	3,792	14,558	16,324
Service charges on deposits	21,634	21,036	63,819	63,441
Insurance fees and commissions	911	869	2,246	3,066
Brokerage fees	3,276	2,895	8,166	8,727
Bankcard fees	17,121	15,196	49,929	47,666
Gain on sales of securities available for sale, net	26	1,140	4,065	8,552
Equity earnings on alternative investments	2,470	4,241	8,462	4,241
Other	3,149	3,991	13,213	9,946
Total noninterest income	126,475	121,625	383,440	356,226
NONINTEREST EXPENSE	'	'	'	'
Salaries and employee benefits	90,041	83,733	268,454	251,000
Occupancy, net	10,475	10,016	29,885	29,175
Equipment	13,408	12,205	38,991	36,012
Supplies and services	4,817	4,761	15,008	14,611
Marketing and business development	6,057	5,536	16,966	15,514
Processing fees	14,085	14,471	42,553	42,854
Legal and consulting	4,496	4,433	12,500	12,877
Bankcard	4,097	4,561	12,782	13,817
Amortization of intangible assets	3,043	3,245	9,219	10,054
Regulatory fees	2,577	2,670	7,802	7,066
Contingency reserve	'	'	20,272	'
Other	8,365	7,432	25,781	20,772
Total noninterest expense	161,461	153,063	500,213	453,752
Income before income taxes	48,040	47,607	128,368	136,329
Income tax provision	12,410	13,175	34,653	37,027
NET INCOME	$35,630	$34,432	$93,715	$99,302
PER SHARE DATA	'	'	'	'
Net income-basic	$0.79	$0.85	$2.09	$2.47
Net income-diluted	$0.78	$0.83	$2.06	$2.44
Dividends	$0.23	$0.22	$0.68	$0.65
Weight average shares outstanding	44,890,309	40,698,700	44,819,125	40,185,351

STATEMENTS_OF_CONSOLIDATED_COM

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS) (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net Income	$35,630	$34,432	$93,715	$99,302
Unrealized (losses) gains on securities:	'	'	'	'
Change in unrealized holding (losses) gains, net	-24,213	11,694	59,156	-151,721
Less: Reclassifications adjustment for gains included in net income	-26	-1,140	-4,065	-8,552
Change in unrealized (losses) gains on securities during the period	-24,239	10,554	55,091	-160,273
Income tax benefit (expense)	9,165	-4,005	-20,624	59,007
Other comprehensive (loss) income	-15,074	6,549	34,467	-101,266
Comprehensive income (loss)	$20,556	$40,981	$128,182	($1,964)

STATEMENTS_OF_CHANGES_IN_CONSO

STATEMENTS OF CHANGES IN CONSOLIDATED SHAREHOLDERS' EQUITY (Unaudited) (USD $)	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
In Thousands	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Beginning Balance at Dec. 31, 2012	$1,279,345	$55,057	$732,069	$787,015	$85,588	($380,384)
Total comprehensive income (loss)	-1,964	'	'	99,302	-101,266	'
Dividends	-26,179	'	'	-26,179	'	'
Purchase of treasury stock	-2,551	'	'	'	'	-2,551
Issuance of equity awards	449	'	-2,189	'	'	2,638
Recognition of equity based compensation	6,319	'	6,319	'	'	'
Net tax benefit related to equity compensation plans	963	'	963	'	'	'
Sale of treasury stock	539	'	367	'	'	172
Exercise of stock options	5,557	'	2,916	'	'	2,641
Common stock issuance	201,177	'	121,708	'	'	79,469
Ending Balance at Sep. 30, 2013	1,463,655	55,057	862,153	860,138	-15,678	-298,015
Beginning Balance at Dec. 31, 2013	1,506,065	55,057	882,407	884,630	-32,640	-283,389
Total comprehensive income (loss)	128,182	'	'	93,715	34,467	'
Dividends	-30,681	'	'	-30,681	'	'
Purchase of treasury stock	-3,858	'	'	'	'	-3,858
Issuance of equity awards	490	'	-2,624	'	'	3,114
Recognition of equity based compensation	7,224	'	7,224	'	'	'
Net tax benefit related to equity compensation plans	1,507	'	1,507	'	'	'
Sale of treasury stock	699	'	455	'	'	244
Exercise of stock options	5,721	'	2,384	'	'	3,337
Ending Balance at Sep. 30, 2014	$1,615,349	$55,057	$891,353	$947,664	$1,827	($280,552)

STATEMENTS_OF_CHANGES_IN_CONSO1

STATEMENTS OF CHANGES IN CONSOLIDATED SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Stockholders' Equity [Abstract]	'	'	'	'
Dividends, per share	$0.23	$0.22	$0.68	$0.65

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Operating Activities	'	'
Net Income	$93,715	$99,302
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Provision for loan losses	14,000	13,500
Depreciation and amortization	34,415	32,998
Deferred income tax benefit	-5,909	-5,292
Net (increase) decrease in trading securities	-11,787	770
Gains on sales of securities available for sale, net	-4,065	-8,552
Gains on sales of assets	-2,948	-674
Amortization of securities premiums, net of discount accretion	38,599	40,339
Originations of loans held for sale	-51,427	-101,935
Net gains on sales of loans held for sale	-814	-609
Proceeds from sales of loans held for sale	51,880	103,388
Equity based compensation	7,714	6,768
Changes in:	'	'
Accrued income	953	-2,281
Accrued expenses and taxes	21,465	28,401
Other assets and liabilities, net	-4,168	-13,009
Net cash provided by operating activities	181,623	193,114
Investing Activities	'	'
Proceeds from maturities of securities held to maturity	16,804	27,209
Proceeds from sales of securities available for sale	410,580	678,522
Proceeds from maturities of securities available for sale	1,034,231	1,193,130
Purchases of securities held to maturity	-58,573	-94,481
Purchases of securities available for sale	-1,411,017	-1,894,722
Net increase in loans	-596,221	-829,856
Net decrease in fed funds sold and resell agreements	21,763	35,434
Net increase in interest bearing balances due from other financial institutions	-130,125	-411
Purchases of bank premises and equipment	-35,219	-26,997
Net cash activity from acquisitions and branch sales	-18,231	692
Proceeds from sales of bank premises and equipment	5,014	808
Purchases of company-owned life insurance	-6,000	'
Net cash used in investing activities	-766,994	-910,672
Financing Activities	'	'
Net (decrease) increase in demand and savings deposits	-386,207	1,505,416
Net decrease in time deposits	-480,791	-117,737
Net increase (decrease) in fed funds purchased and repurchase agreements	128,591	-259,306
Net decrease in short-term debt	-107	-303
Proceeds from long-term debt	3,320	1,000
Repayment of long-term debt	-1,308	-1,235
Payment of contingent consideration on acquisitions	-13,725	-16,172
Cash dividends paid	-30,679	-26,002
Net tax benefit related to equity compensation plans	1,507	963
Common stock issuance	'	201,177
Proceeds from exercise of stock options and sales of treasury shares	6,420	6,096
Purchases of treasury stock	-3,858	-2,551
Net cash (used in) provided by financing activities	-776,837	1,291,346
(Decrease) increase in cash and cash equivalents	-1,362,208	573,788
Cash and cash equivalents at beginning of period	2,582,428	1,366,394
Cash and cash equivalents at end of period	1,220,220	1,940,182
Supplemental Disclosures:	'	'
Income taxes paid	40,789	34,351
Total interest paid	$10,720	$12,560

Financial_Statement_Presentati

Financial Statement Presentation	9 Months Ended
Financial Statement Presentation	Sep. 30, 2014
Accounting Policies [Abstract]	'
Financial Statement Presentation	'
	1. Financial Statement Presentation
	The consolidated financial statements include the accounts of UMB Financial Corporation and its subsidiaries (collectively, the Company) after elimination of all intercompany transactions. In the opinion of management of the Company, all adjustments, which were of a normal recurring nature and necessary for a fair presentation of the financial position and results of operations, have been made. The results of operations and cash flows for the interim periods presented may not be indicative of the results of the full year. The financial statements should be read in conjunction with 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	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 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.
	Cash and cash equivalents
	Cash and cash equivalents include Cash and due from banks and amounts due from the Federal Reserve Bank. Amounts due from the Federal Reserve Bank are interest-bearing for all periods presented and are included in the Interest-bearing due from banks line on the Company’s Consolidated Balance Sheets.
	This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of September 30, 2014 and September 30, 2013 (in thousands):


		September 30,
		2014		2013
	Due from the Federal Reserve	$	824,264	$	1,335,590
	Cash and due from banks		395,956		604,592

	Cash and cash equivalents at end of period	$	1,220,220	$	1,940,182

	Also included in the Interest-bearing due from banks line, but not considered cash and cash equivalents are amounts due from certificates of deposits held at other financial institutions. The amounts due from certificates of deposit totaled $157.3 million and $22.3 million at September 30, 2014 and September 30, 2013, respectively.
	Per Share Data
	Basic income per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted quarterly per share data includes the dilutive effect of 551,674 and 650,028 shares issuable upon the exercise of options granted by the Company and outstanding at September 30, 2014 and 2013, respectively. Diluted year-to-date income per share includes the dilutive effect of 601,260 and 544,930 shares issuable upon the exercise of stock options granted by the Company and outstanding at September 30, 2014 and 2013, respectively.

	Options issued under employee benefits plans to purchase 250,911 shares of common stock were outstanding at September 30, 2014, but were not included in the computation of quarter-to-date diluted EPS because the options were anti-dilutive. Options issued under employee benefit plans to purchase 250,911 and 270,839 shares of common stock were outstanding at September 30, 2014 and 2013, respectively, but were not included in the computation of year-to-date diluted EPS because the options were anti-dilutive.
	Common Stock Issuance
	On September 16, 2013, the Company completed the issuance of 3.9 million shares of common stock with net proceeds of $201.2 million to be used for strategic growth purposes. In addition, UMB granted the underwriters a 30-day option to purchase up to an additional 585,000 shares of common stock. On October 17, 2013, the underwriters exercised the option of 585,000 shares, which generated additional net proceeds of $30.2 million.

New_Accounting_Pronouncements

New Accounting Pronouncements	9 Months Ended
New Accounting Pronouncements	Sep. 30, 2014
Accounting Changes and Error Corrections [Abstract]	'
New Accounting Pronouncements	'
	3. New Accounting Pronouncements
	Investment Companies In June 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (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 consolidated financial statements.
	Revenue Recognition In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers.” The issuance is part of a joint effort by the FASB and the International Accounting Standards Board (IASB) to enhance financial reporting by creating common revenue recognition guidance for U.S. Generally Accepted Accounting Principles (GAAP) and International Financial Reporting Standards (IFRS) and, thereby, improving the consistency of requirements, comparability of practices and usefulness of disclosures. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The amendments in this update are effective for interim and annual periods beginning after December 15, 2016. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is currently evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.
	Repurchase-to-Maturity Transactions In June 2014, the FASB issued ASU No. 2014-11, “Repurchase-to-Maturity Transactions, Repurchased Financings, and Disclosures.” The amendment changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with accounting for other repurchase agreements. Additionally, the amendment requires new disclosures on transfers accounted for as sales in transactions that are economically similar to repurchase agreements and requires increased transparency on collateral pledged in secured borrowings. The amendments in this update are effective for interim and annual periods beginning after December 15, 2014. Early application is not permitted. The Company is currently evaluating the effect that ASU 2014-11 will have on its consolidated financial statements and related financial statement disclosures.
	Stock Compensation In June 2014, the FASB issued ASU No. 2014-12, “Accounting for Share-Based Payments When the Terms of an Award Provide that a Performance Target could be Achieved after the Requisite Service Period.” The amendment is intended to reduce diversity in practice by clarifying that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The amendments in this update are effective for interim and annual periods beginning after December 15, 2015 with early adoption permitted. The adoption of this accounting pronouncement will not have a significant impact on the Company’s consolidated financial statements.
	Troubled Debt Restructurings by Creditors In August 2014, the FASB issued ASU No. 2014-14, “Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure.” The amendment is intended to reduce diversity in practice in the classification of mortgage loans extended under certain government-sponsored loan guarantee programs, such as those offered by the Federal Housing Administration (FHA) and the Department of Veterans Affairs (VA), that entitle the creditor to recover all or a portion of the unpaid principal balance from the government if a borrower defaults. This update requires government-guaranteed mortgage loans that meet certain criteria to be derecognized and a separate receivable be recognized upon foreclosure. 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 consolidated financial statements.
	Going Concern In August 2014, the FASB issued ASU No. 2014-15, “Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” The amendment addresses management’s responsibility in regularly evaluating whether there is substantial doubt about a company’s ability to continue as a going concern. The amendments in this update are effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter, although early adoption is permitted. The adoption of this accounting pronouncement will not have a significant impact on the Company’s consolidated financial statements.

Loans_and_Allowance_for_Loan_L

Loans and Allowance for Loan Losses	9 Months Ended
Loans and Allowance for Loan Losses	Sep. 30, 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, 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 September 30, 2014 and December 31, 2013 (in thousands):


			September 30, 2014
			30-89			Greater			Non-			Total			Current			Total Loans
			Days Past			than 90			Accrual			Past
			Due and			Days Past			Loans			Due
			Accruing			Due and
						Accruing
	Commercial:
	Commercial		$	1,376		$	199		$	15,075		$	16,650		$	3,522,624		$	3,539,274
	Commercial – credit card			293			75			44			412			129,612			130,024
	Real estate:
	Real estate – construction			2,380			—			948			3,328			242,477			245,805
	Real estate – commercial			3,050			2,038			15,267			20,355			1,786,570			1,806,925
	Real estate – residential			869			207			567			1,643			315,183			316,826
	Real estate – HELOC			157			—			115			272			629,224			629,496
	Consumer:
	Consumer – credit card			2,348			1,962			550			4,860			298,833			303,693
	Consumer – other			3,723			197			96			4,016			87,904			91,920
	Leases			—			—			—			—			39,200			39,200

	Total loans		$	14,196		$	4,678		$	32,662		$	51,536		$	7,051,627		$	7,103,163


			31-Dec-13
			30-89			Greater			Non-			Total			Current			Total
			Days Past			than 90			Accrual			Past						Loans
			Due and			Days Past			Loans			Due
			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 $51.9 million and $103.4 million of residential real estate and student loans in the secondary market without recourse during the nine-month periods ended September 30, 2014 and September 30, 2013, respectively.
	The Company has ceased the recognition of interest on loans with a carrying value of $32.7 million and $30.7 million at September 30, 2014 and December 31, 2013, respectively. Restructured loans totaled $10.2 million and $12.1 million at September 30, 2014 and December 31, 2013, respectively. Loans 90 days past due and still accruing interest amounted to $4.7 million and $3.2 million at September 30, 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 September 30, 2014 and December 31, 2013 (in thousands):
Credit Exposure
Credit Risk Profile by Risk Rating



		Commercial						Real estate-construction
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
Non-watch list		$	3,263,847		$	3,041,224		$	243,513		$	151,359
Watch			61,424			110,932			186			210
Special Mention			87,947			78,064			758			—
Substandard			126,056			71,283			1,348			1,306

Total		$	3,539,274		$	3,301,503		$	245,805		$	152,875



		Real estate-commercial
		September 30,			December 31,
		2014			2013
Non-watch list		$	1,689,958		$	1,565,894
Watch			46,509			76,647
Special Mention			24,677			19,876
Substandard			45,781			39,734

Total		$	1,806,925		$	1,702,151

Credit Exposure
Credit Risk Profile Based on Payment Activity


		Commercial-credit card						Real estate-residential
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
Performing		$	129,980		$	103,232		$	316,259		$	288,488
Non-performing			44			38			567			868

Total		$	130,024		$	103,270		$	316,826		$	289,356


		Real estate-HELOC						Consumer-credit card
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
Performing		$	629,381		$	565,918		$	303,143		$	317,305
Non-performing			115			210			550			1,031

Total		$	629,496		$	566,128		$	303,693		$	318,336


		Consumer-other						Leases
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
Performing		$	91,824		$	62,542		$	39,200		$	23,981
Non-performing			96			370			—			—

Total		$	91,920		$	62,912		$	39,200		$	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 the three and nine months ended September 30, 2014 (in thousands):


		Three Months Ended September 30, 2014
		Commercial			Real estate			Consumer			Leases			Total
Allowance for loan losses:
Beginning balance		$	52,433		$	14,217		$	10,074		$	78		$	76,802
Charge-offs			(2,033	)		(57	)		(2,745	)		—			(4,835	)
Recoveries			396			8			445			—			849
Provision			3,983			(1,515	)		1,964			68			4,500

Ending Balance		$	54,779		$	12,653		$	9,738		$	146		$	77,316


		Nine Months Ended September 30, 2014
		Commercial			Real estate			Consumer			Leases			Total
Allowance for loan losses:
Beginning balance		$	48,886		$	15,342		$	10,447		$	76		$	74,751
Charge-offs			(4,980	)		(238	)		(8,881	)		—			(14,099	)
Recoveries			664			25			1,975			—			2,664
Provision			10,209			(2,476	)		6,197			70			14,000

Ending Balance		$	54,779		$	12,653		$	9,738		$	146		$	77,316

Ending Balance: individually evaluated for impairment		$	2,252		$	1,368		$	—		$	—		$	3,620
Ending Balance: collectively evaluated for impairment			52,527			11,285			9,738			146			73,696
Loans:
Ending Balance: loans		$	3,669,298		$	2,999,052		$	395,613		$	39,200		$	7,103,163
Ending Balance: individually evaluated for impairment			19,176			13,467			17			—			32,660
Ending Balance: collectively evaluated for impairment			3,650,122			2,985,585			395,596			39,200			7,070,503

This table provides a rollforward of the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2013 (in thousands):


		Three Months Ended September 30, 2013
		Commercial			Real estate			Consumer			Leases			Total
Allowance for loan losses:
Beginning balance		$	45,108		$	16,296		$	10,168		$	75		$	71,647
Charge-offs			(592	)		(162	)		(3,126	)		—			(3,880	)
Recoveries			246			21			404			—			671
Provision			3,491			2			2,996			11			6,500

Ending Balance		$	48,253		$	16,157		$	10,442		$	86		$	74,938


		Nine Months Ended September 30, 2013
		Commercial			Real estate			Consumer			Leases			Total
Allowance for loan losses:
Beginning balance		$	43,390		$	15,506		$	12,470		$	60		$	71,426
Charge-offs			(3,015	)		(533	)		(9,265	)		—			(12,813	)
Recoveries			761			37			2,027			—			2,825
Provision			7,117			1,147			5,210			26			13,500

Ending Balance		$	48,253		$	16,157		$	10,442		$	86		$	74,938

Ending Balance: individually evaluated for impairment		$	3,301		$	1,412		$	—		$	—		$	4,713
Ending Balance: collectively evaluated for impairment			44,952			14,745			10,442			86			70,225
Loans:
Ending Balance: loans		$	3,494,603		$	2,604,956		$	381,704		$	25,639		$	6,506,902
Ending Balance: individually evaluated for impairment			14,835			15,852			30			—			30,717
Ending Balance: collectively evaluated for impairment			3,479,768			2,589,104			381,674			25,639			6,476,185

Impaired Loans
This table provides an analysis of impaired loans by class at September 30, 2014 and December 31, 2013 (in thousands):



		30-Sep-14
		Unpaid			Recorded			Recorded			Total			Related			Average
		Principal			Investment			Investment			Recorded			Allowance			Recorded
		Balance			with No			with			Investment						Investment
					Allowance			Allowance
Commercial:
Commercial		$	23,599		$	8,710		$	10,466		$	19,176		$	2,252		$	15,762
Commercial – credit card			—			—			—			—			—			—
Real estate:
Real estate – construction			1,499			825			123			948			123			928
Real estate – commercial			13,758			4,816			6,652			11,468			1,245			12,035
Real estate – residential			1,224			1,051			—			1,051			—			1,030
Real estate – HELOC			—			—			—			—			—			—
Consumer:
Consumer – credit card			—			—			—			—			—			—
Consumer – other			17			17			—			17			—			15
Leases			—			—			—			—			—			—

Total		$	40,097		$	15,419		$	17,241		$	32,660		$	3,620		$	29,770


		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 losses as described above in the Allowance for Loan Losses section of this note.
The Company had $428 thousand in commitments to lend to borrowers with loan modifications classified as TDR’s as of September 30, 2014. The Company made no TDR’s in the last 12 months that had payment defaults for the three or nine-month periods ended September 30, 2014.
This table provides a summary of loans restructured by class during the three and nine months ended September 30, 2014 (in thousands):


		Three Months Ended September 30, 2014									Nine Months Ended September 30, 2014
		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			1			178			178			1			178			178
Real estate – residential			1			67			67			4			277			301
Real estate – HELOC			—			—			—			—			—			—
Consumer:
Consumer – credit card			—			—			—			—			—			—
Consumer – other			—			—			—			—			—			—
Leases			—			—			—			—			—			—

Total			2		$	245		$	245			6		$	924		$	948


This table provides a summary of loans restructured by class for the three and nine months ended September 30, 2013 (in thousands):


		Three Months Ended September 30, 2013									Nine Months Ended September 30, 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		$	182		$	182			3		$	1,311		$	1,249
Commercial – credit card			—			—			—			—			—			—
Real estate:
Real estate – construction			—			—			—			—			—			—
Real estate – commercial			—			—			—			1			937			937
Real estate – residential			—			—			—			1			425			425
Real estate – HELOC			—			—			—			—			—			—
Consumer:
Consumer – credit card			—			—			—			—			—			—
Consumer – other			—			—			—			—			—			—
Leases			—			—			—			—			—			—

Total			1		$	182		$	182			5		$	2,673		$	2,611

Securities

Securities	9 Months Ended
Securities	Sep. 30, 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 September 30, 2014 and December 31, 2013 (in thousands):


						Gross				Gross
			Amortized			Unrealized				Unrealized				Fair
			Cost			Gains				Losses				Value
	September 30, 2014
	U.S. Treasury		$	510,650		$	472			$	(905	)		$	510,217
	U.S. Agencies			986,247			1,029				(1,853	)			985,423
	Mortgage-backed			3,182,642			23,396				(39,665	)			3,166,373
	State and political subdivisions			1,944,165			27,390				(5,874	)			1,965,681
	Corporates			133,312			5				(1,208	)			132,109

	Total		$	6,757,016		$	52,292			$	(49,505	)		$	6,759,803


						Gross				Gross
			Amortized			Unrealized				Unrealized				Fair
			Cost			Gains				Losses				Value
	December 31, 2013
	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 September 30, 2014 (in thousands):


			Amortized			Fair
			Cost			Value
	Due in 1 year or less		$	466,001		$	467,789
	Due after 1 year through 5 years			2,299,824			2,311,028
	Due after 5 years through 10 years			687,956			696,024
	Due after 10 years			120,593			118,589

	Total			3,574,374			3,593,430
	Mortgage-backed securities			3,182,642			3,166,373

	Total securities available for sale		$	6,757,016		$	6,759,803

	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 nine months ended September 30, 2014, proceeds from the sales of securities available for sale were $410.6 million compared to $678.5 million for the same period in 2013. Securities transactions resulted in gross realized gains of $4.1 million and $8.8 million for the nine months ended September 30, 2014 and 2013. The gross realized losses for the nine months ended September 30, 2014 and 2013 were $11 thousand and $220 thousand, respectively.
	Securities available for sale with a market value of $5.1 billion at September 30, 2014, and $5.9 billion at December 31, 2013, were pledged to secure U.S. Government deposits, other public deposits, certain trust deposits as required by law, and other potential borrowings. Of this amount, securities with a market value of $1.4 billion at September 30, 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 September 30, 2014 and December 31, 2013 (in thousands):


			Less than 12 months							12 months or more								Total
			Fair Value			Unrealized				Fair Value				Unrealized				Fair Value			Unrealized
			Fair Value			Losses				Fair Value				Losses				Fair Value			Losses
	September 30, 2014
	Description of Securities
	U.S. Treasury		$	215,360		$	(404	)		$	29,471			$	(501	)		$	244,831		$	(905	)
	U.S. Agencies			407,420			(604	)			117,295				(1,249	)			524,715			(1,853	)
	Mortgage-backed			1,474,931			(23,122	)			533,596				(16,543	)			2,008,527			(39,665	)
	State and political subdivisions			177,480			(410	)			294,762				(5,464	)			472,242			(5,874	)
	Corporates			42,072			(246	)			86,349				(962	)			128,421			(1,208	)

Total temporarily-impaired debt securities available for sale		$	2,317,263		$	(24,786	)		$	1,061,473			$	(24,719	)		$	3,378,736		$	(49,505	)


		Less than 12 months							12 months or more								Total
		Fair Value			Unrealized				Fair Value				Unrealized				Fair Value			Unrealized
		Fair Value			Losses				Fair Value				Losses				Fair Value			Losses
December 31, 2013
Description of Securities
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. 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 amortized cost. The Company expects to recover its cost basis in the securities and does not consider these investments to be other-than-temporarily impaired at September 30, 2014.
Securities Held to Maturity
The table below provides detailed information for securities held to maturity at September 30, 2014 and December 31, 2013 (in thousands):


					Gross				Gross
		Amortized			Unrealized				Unrealized				Fair
		Cost			Gains				Losses				Value
September 30, 2014
State and political subdivisions		$	237,961		$	32,329			$	—			$	270,290

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 September 30, 2014 (in thousands):

		Amortized			Fair
		Cost			Value
Due in 1 year or less		$	46		$	52
Due after 1 year through 5 years			26,650			30,271
Due after 5 years through 10 years			132,268			150,238
Due after 10 years			78,997			89,729

Total securities held to maturity		$	237,961		$	270,290

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 nine months of 2014 or 2013.
Trading Securities
The net unrealized gains on trading securities at September 30, 2014 and September 30, 2013 were $38.9 thousand and $14.0 thousand, 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 September 30, 2014 and December 31, 2013 (in thousands):


					Gross				Gross
		Amortized			Unrealized				Unrealized				Fair
		Cost			Gains				Losses				Value
September 30, 2014
Federal Reserve Bank stock		$	16,279		$	—			$	—			$	16,279
Other securities – marketable			—			19,472				—				19,472
Other securities – non-marketable			29,839			5,602				—				35,441

Total Federal Reserve Bank stock and other		$	46,118		$	25,074			$	—			$	71,192

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 $19.5 million at September 30, 2014 and $16.6 million at December 31, 2013. The fair value of other non-marketable securities includes alternative investment securities of $10.2 million at September 30, 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	9 Months Ended
Goodwill and Other Intangibles	Sep. 30, 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 September 30, 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 September 30, 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 September 30, 2014 and December 31, 2013 (in thousands):


		Gross Carrying		Accumulated		Net Carrying
		Amount		Amortization		Amount
	September 30, 2014
	Core deposit intangible assets	$	36,497	$	32,484	$	4,013
	Customer relationships		104,560		62,299		42,261
	Other intangible assets		3,247		2,555		692

	Total intangible assets	$	144,304	$	97,338	$	46,966

	December 31, 2013
	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				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Aggregate amortization expense		$3,043		$3,245	$	9,219	$	10,054

	Estimated amortization expense of intangible assets on future years (in thousands):


	For the three months ending December 31, 2014	$	2,974
	For the year ending December 31, 2015		9,636
	For the year ending December 31, 2016		8,428
	For the year ending December 31, 2017		7,185
	For the year ending December 31, 2018		4,994
	For the year ending December 31, 2019		4,204

Commitments_Contingencies_and_

Commitments, Contingencies and Guarantees	9 Months Ended
Commitments, Contingencies and Guarantees	Sep. 30, 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):


		September 30,		December 31,
		2014		2013
	Commitments to extend credit for loans (excluding credit card loans)	$	3,167,398	$	2,690,268
	Commitments to extend credit under credit card loans		2,384,213		2,215,278
	Commercial letters of credit		1,415		5,949
	Standby letters of credit		374,109		356,054
	Forward foreign exchange contracts		66,939		21,525
	Spot foreign exchange contracts		1,425		8,001

Business_Segment_Reporting

Business Segment Reporting	9 Months Ended
Business Segment Reporting	Sep. 30, 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 September 30, 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 September 30, 2014
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	72,906		$	13,442		$	—			$	1,178		$	87,526
	Provision for loan losses			2,446			2,054			—				—			4,500
	Noninterest income			48,385			21,579			33,919				22,592			126,475
	Noninterest expense			99,307			22,056			20,910				19,188			161,461

	Income before taxes			19,538			10,911			13,009				4,582			48,040
	Income tax expense			5,081			2,795			3,350				1,184			12,410

	Net income		$	14,457		$	8,116		$	9,659			$	3,398		$	35,630

	Average assets		$	11,639,000		$	2,823,000		$	74,000			$	1,102,000		$	15,638,000


			Three Months Ended September 30, 2013
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	73,419		$	11,587		$	(11	)		$	550		$	85,545
	Provision for loan losses			1,833			4,667			—				—			6,500
	Noninterest income			48,945			18,409			33,842				20,429			121,625
	Noninterest expense			93,150			21,658			21,054				17,201			153,063

	Income before taxes			27,381			3,671			12,777				3,778			47,607
	Income tax expense			6,922			1,283			3,506				1,464			13,175

	Net income		$	20,459		$	2,388		$	9,271			$	2,314		$	34,432

	Average assets		$	11,128,000		$	1,727,000		$	76,000			$	1,993,000		$	14,924,000


			Nine Months Ended September 30, 2014
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	216,508		$	38,220		$	(3	)		$	4,416		$	259,141
	Provision for loan losses			7,558			6,442			—				—			14,000
	Noninterest income			151,843			62,998			102,014				66,585			383,440
	Noninterest expense			308,013			67,680			68,848				55,672			500,213

	Income before taxes			52,780			27,096			33,163				15,329			128,368
	Income tax expense			14,326			7,272			8,887				4,168			34,653

	Net income		$	38,454		$	19,824		$	24,276			$	11,161		$	93,715

	Average assets		$	11,914,000		$	2,350,000		$	74,000			$	1,583,000		$	15,921,000

			Nine Months Ended September 30, 2013
			Bank			Payment			Institutional				Asset			Total
Solutions						Investment			Servicing
						Management
Net interest income			$	211,238		$	34,327		$	(22	)		$	1,812		$	247,355
Provision for loan losses				3,770			9,730			—				—			13,500
Noninterest income			148,129			56,486			91,550				60,061			356,226
Noninterest expense			277,226			63,626			58,754				54,146			453,752

Income before taxes			78,371			17,457			32,774				7,727			136,329
Income tax expense			19,629			5,464			8,880				3,054			37,027

Net income		$	58,742		$	11,993		$	23,894			$	4,673		$	99,302

Average assets		$	11,145,000		$	1,770,000		$	79,000			$	1,867,000		$	14,861,000

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities	9 Months Ended
Derivatives and Hedging Activities	Sep. 30, 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 September 30, 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 Sheets.
	This table provides a summary of the fair value of the Company’s derivative assets and liabilities as of September 30, 2014 and December 31, 2013 (in thousands):


		Asset Derivatives						Liability Derivatives
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
	Fair value
	Interest Rate Products:
	Derivatives not designated as hedging instruments	$	4,548		$	2,442		$	4,637		$	2,346
	Derivatives designated as hedging instruments		—			76			141			—

	Total	$	4,548		$	2,518		$	4,778		$	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, London Interbank Offered 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 September 30, 2014, the Company had one interest rate swap with a notional amount of $6.7 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 and nine months ended September 30, 2014, the Company recognized net losses of $1 thousand and $19 thousand, respectively, 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 September 30, 2014, the Company had 28 interest rate swaps with an aggregate notional amount of $343.3 million related to this program. During the three and nine months ended September 30, 2014, the Company recognized $133 thousand and $185 thousand of net losses, respectively, related to changes in fair value of these swaps. During the three and nine months ended September 30, 2013, the Company recognized $40 thousand of net losses and $114 thousand of net gains, respectively, related to changes in the fair value of these swaps in Other noninterest expense.
	Effect of Derivative Instruments on the Income Statement
	This table provides a summary of the amount of gain (loss) recognized in Other non-interest expense in the Consolidated Statements of Income related to the Company’s derivative asset and liability for the three and nine months ended September 30, 2014 and September 30, 2013 (in thousands):


		Amount of Gain (Loss) Recognized
		For the Three Months Ended						For the Nine Months Ended
		September 30,			September 30,			September 30,			September 30,
		2014			2013			2014			2013
	Interest Rate Products
	Derivatives not designated as hedging instruments	$	(133	)	$	(40	)	$	(185	)	$	114

	Total	$	(133	)	$	(40	)	$	(185	)	$	114

	Interest Rate Products
	Derivatives designated as hedging instruments
	Fair value adjustments on derivatives	$	19		$	—		$	(216	)	$	—
	Fair value adjustments on hedged items		(20	)		—			197			—

	Total	$	(1	)	$	—		$	(19	)	$	—

	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 September 30, 2014 the termination value of derivatives in a net liability position, which includes accrued interest, related to these agreements was $24 thousand. 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 September 30, 2014, it could have been required to settle its obligations under the agreements at the termination value.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
Fair Value Measurements	Sep. 30, 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 September 30, 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 measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013 (in thousands):


			Fair Value Measurement at September 30, 2014
	Description		September 30,			Quoted			Significant			Significant
			2014			Prices in			Other			Unobservable
						Active			Observable			Inputs
						Markets for			Inputs			(Level 3)
						Identical			(Level 2)
						Assets
						(Level 1)
	Assets
	U.S. Treasury		$	500		$	500		$	—		$	—
	U.S. Agencies			—			—			—			—
	Mortgage-backed			3,922			—			3,922			—
	State and political subdivisions			8,988			—			8,988			—
	Trading - other			18,380			18,380			—			—

	Trading securities			31,790			18,880			12,910			—

	U.S. Treasury			510,217			510,217			—			—
	U.S. Agencies			985,423			—			985,423			—
	Mortgage-backed			3,166,373			—			3,166,373			—
	State and political subdivisions			1,965,681			—			1,965,681			—
	Corporates			132,109			132,109			—			—

	Available for sale securities			6,759,803			642,326			6,117,477			—
	Company-owned life insurance			26,748			—			26,748			—
	Derivatives			4,548			—			4,548			—

	Total		$	6,822,889		$	661,206		$	6,161,683		$	—

	Liabilities
	Deferred compensation		$	26,188		$	26,188		$	—		$	—
	Contingent consideration liability			54,259			—			—			54,259
	Derivatives			4,778			—			4,778			—

	Total		$	85,225		$	26,188		$	4,778		$	54,259



			Fair Value Measurement at December 31, 2013
	Description		December 31,			Quoted Prices			Significant			Significant
			2013			in Active			Other			Unobservable
						Markets for			Observable			Inputs
						Identical			Inputs			(Level 3)
						Assets			(Level 2)
						(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 balances of the contingent consideration liability for the nine months ended September 30, 2014 (in thousands):


		Nine Months Ended September 30,
		2014			2013
Beginning Balance		$	46,201		$	51,163
Contingency reserve			14,272			—
Payment of contingent considerations on acquisitions			(13,725	)		(16,172	)
Income from fair value adjustments			—			(138	)
Expense from fair value adjustments			7,511			4,462

Ending Balance		$	54,259		$	39,315

During the nine month period ended September 30, 2014, the Company recorded contingency reserve expense of $20.3 million in its Consolidated Statement of Income related to the resolution of the PCM dispute. On June 30, 2014, the Company made a payment of $6.0 million, reducing the remaining contingency reserve to $14.3 million. The settlement agreement amends the original asset purchase agreement dated June 27, 2010, and subsequent to the settlement, the remaining contingency reserve liability has been included in the table above as additional contingent consideration recorded at fair value. Fair value adjustments made subsequent to settlement are included in the table above as Expense from fair value adjustments.

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
Description		Valuation Techniques		Unobservable Inputs	Range
Liabilities
Contingent consideration liability		Discounted cash flows		Revenue growth percentage		1% - 98	%
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 or dealer quote 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 and Chief Executive 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 September 30, 2014 and December 31, 2013 (in thousands):


		Fair Value Measurement at September 30, 2014
Description		September 30,			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 Nine
					(Level 1)									Months Ended
														September 30
Impaired loans		$	13,621		$			$			$	13,621		$	632
Other real estate owned			138			—			—			138		$	—

Total		$	13,759		$			$			$	13,759		$	632



		Fair Value Measurement at December 31, 2013
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	)

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 write-downs that are based on the external appraisal value of the underlying collateral. 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. 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, third-party price opinions, or internally developed pricing methods and those measurements are 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 September 30, 2014 and December 31, 2013 are as follows (in millions):


		Fair Value Measurement at September 30, 2014
		Carrying			Quoted Prices			Significant			Significant			Total
		Amount			in Active			Other			Unobservable			Estimated
					Markets for			Observable			Inputs			Fair Value
					Identical Assets			Inputs			(Level 3)
					(Level 1)			(Level 2)
FINANCIAL ASSETS
Securities held to maturity		$	238		$	—		$	270.3		$	—		$	270.3
Federal Reserve Bank and other			71.2			—			71.2			—			71.2
Loans (exclusive of allowance for loan loss)			7,104.90			—			7,136.30			—			7,136.30
FINANCIAL LIABILITIES
Time deposits			961.1			—			960.7			—			960.7
Long-term debt			7.1			—			7.3			—			7.3
OFF-BALANCE SHEET ARRANGEMENTS
Commitments to extend credit for loans															4.3
Commercial letters of credit															0.1
Standby letters of credit															1.8


		Fair Value Measurement at December 31, 2013
		Carrying			Quoted Prices			Significant			Significant			Total
		Amount			in Active			Other			Unobservable			Estimated
					Markets for			Observable			Inputs			Fair Value
					Identical Assets			Inputs			(Level 3)
					(Level 1)			(Level 2)
FINANCIAL ASSETS
Securities held to maturity		$	209.8		$	—		$	231.5		$	—		$	231.5
Federal Reserve Bank and other			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 investments.

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.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 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.
Cash and Cash Equivalents	'
	Cash and cash equivalents
	Cash and cash equivalents include Cash and due from banks and amounts due from the Federal Reserve Bank. Amounts due from the Federal Reserve Bank are interest-bearing for all periods presented and are included in the Interest-bearing due from banks line on the Company’s Consolidated Balance Sheets.
	This table provides a summary of cash and cash equivalents as presented on the Consolidated Statement of Cash Flows as of September 30, 2014 and September 30, 2013 (in thousands):


		September 30,
		2014		2013
	Due from the Federal Reserve	$	824,264	$	1,335,590
	Cash and due from banks		395,956		604,592

	Cash and cash equivalents at end of period	$	1,220,220	$	1,940,182

	Also included in the Interest-bearing due from banks line, but not considered cash and cash equivalents are amounts due from certificates of deposits held at other financial institutions. The amounts due from certificates of deposit totaled $157.3 million and $22.3 million at September 30, 2014 and September 30, 2013, respectively.
Per Share Data	'
	Per Share Data
	Basic income per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted quarterly per share data includes the dilutive effect of 551,674 and 650,028 shares issuable upon the exercise of options granted by the Company and outstanding at September 30, 2014 and 2013, respectively. Diluted year-to-date income per share includes the dilutive effect of 601,260 and 544,930 shares issuable upon the exercise of stock options granted by the Company and outstanding at September 30, 2014 and 2013, respectively.

	Options issued under employee benefits plans to purchase 250,911 shares of common stock were outstanding at September 30, 2014, but were not included in the computation of quarter-to-date diluted EPS because the options were anti-dilutive. Options issued under employee benefit plans to purchase 250,911 and 270,839 shares of common stock were outstanding at September 30, 2014 and 2013, respectively, but were not included in the computation of year-to-date diluted EPS because the options were anti-dilutive.
Common Stock Issuance	'
	Common Stock Issuance
	On September 16, 2013, the Company completed the issuance of 3.9 million shares of common stock with net proceeds of $201.2 million to be used for strategic growth purposes. In addition, UMB granted the underwriters a 30-day option to purchase up to an additional 585,000 shares of common stock. On October 17, 2013, the underwriters exercised the option of 585,000 shares, which generated additional net proceeds of $30.2 million.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	9 Months Ended
Summary of Significant Accounting Policies (Tables)	Sep. 30, 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 September 30, 2014 and September 30, 2013 (in thousands):


		September 30,
		2014		2013
	Due from the Federal Reserve	$	824,264	$	1,335,590
	Cash and due from banks		395,956		604,592

	Cash and cash equivalents at end of period	$	1,220,220	$	1,940,182

Loans_and_Allowance_for_Loan_L1

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
Loans and Allowance for Loan Losses (Tables)	Sep. 30, 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 September 30, 2014 and December 31, 2013 (in thousands):


		September 30, 2014
		30-89			Greater			Non-			Total		Current			Total Loans
		Days Past			than 90			Accrual			Past
		Due and			Days Past			Loans			Due
		Accruing			Due and
					Accruing
	Commercial:
	Commercial	$	1,376		$	199		$	15,075		$	16,650	$	3,522,624		$	3,539,274
	Commercial – credit card		293			75			44			412		129,612			130,024
	Real estate:
	Real estate – construction		2,380			—			948			3,328		242,477			245,805
	Real estate – commercial		3,050			2,038			15,267			20,355		1,786,570			1,806,925
	Real estate – residential		869			207			567			1,643		315,183			316,826
	Real estate – HELOC		157			—			115			272		629,224			629,496
	Consumer:
	Consumer – credit card		2,348			1,962			550			4,860		298,833			303,693
	Consumer – other		3,723			197			96			4,016		87,904			91,920
	Leases		—			—			—			—		39,200			39,200

	Total loans	$	14,196		$	4,678		$	32,662		$	51,536	$	7,051,627		$	7,103,163


		31-Dec-13
		30-89			Greater			Non-			Total		Current			Total
		Days Past			than 90			Accrual			Past					Loans
		Due and			Days Past			Loans			Due
		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
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
	Non-watch list	$	3,263,847		$	3,041,224		$	243,513		$	151,359
	Watch		61,424			110,932			186			210
	Special Mention		87,947			78,064			758			—
	Substandard		126,056			71,283			1,348			1,306

	Total	$	3,539,274		$	3,301,503		$	245,805		$	152,875



		Real estate-commercial
		September 30,			December 31,
		2014			2013
	Non-watch list	$	1,689,958		$	1,565,894
	Watch		46,509			76,647
	Special Mention		24,677			19,876
	Substandard		45,781			39,734

	Total	$	1,806,925		$	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
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
	Performing	$	129,980		$	103,232		$	316,259		$	288,488
	Non-performing		44			38			567			868

	Total	$	130,024		$	103,270		$	316,826		$	289,356


		Real estate-HELOC						Consumer-credit card
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
	Performing	$	629,381		$	565,918		$	303,143		$	317,305
	Non-performing		115			210			550			1,031

	Total	$	629,496		$	566,128		$	303,693		$	318,336


		Consumer-other						Leases
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
	Performing	$	91,824		$	62,542		$	39,200		$	23,981
	Non-performing		96			370			—			—

	Total	$	91,920		$	62,912		$	39,200		$	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 the three and nine months ended September 30, 2014 (in thousands):


		Three Months Ended September 30, 2014
		Commercial			Real estate			Consumer			Leases		Total
	Allowance for loan losses:
	Beginning balance	$	52,433		$	14,217		$	10,074		$	78	$	76,802
	Charge-offs		(2,033	)		(57	)		(2,745	)		—		(4,835	)
	Recoveries		396			8			445			—		849
	Provision		3,983			(1,515	)		1,964			68		4,500

	Ending Balance	$	54,779		$	12,653		$	9,738		$	146	$	77,316


		Nine Months Ended September 30, 2014
		Commercial			Real estate			Consumer			Leases		Total
	Allowance for loan losses:
	Beginning balance	$	48,886		$	15,342		$	10,447		$	76	$	74,751
	Charge-offs		(4,980	)		(238	)		(8,881	)		—		(14,099	)
	Recoveries		664			25			1,975			—		2,664
	Provision		10,209			(2,476	)		6,197			70		14,000

	Ending Balance	$	54,779		$	12,653		$	9,738		$	146	$	77,316

	Ending Balance: individually evaluated for impairment	$	2,252		$	1,368		$	—		$	—	$	3,620
	Ending Balance: collectively evaluated for impairment		52,527			11,285			9,738			146		73,696
	Loans:
	Ending Balance: loans	$	3,669,298		$	2,999,052		$	395,613		$	39,200	$	7,103,163
	Ending Balance: individually evaluated for impairment		19,176			13,467			17			—		32,660
	Ending Balance: collectively evaluated for impairment		3,650,122			2,985,585			395,596			39,200		7,070,503

	This table provides a rollforward of the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2013 (in thousands):


		Three Months Ended September 30, 2013
		Commercial			Real estate			Consumer			Leases		Total
	Allowance for loan losses:
	Beginning balance	$	45,108		$	16,296		$	10,168		$	75	$	71,647
	Charge-offs		(592	)		(162	)		(3,126	)		—		(3,880	)
	Recoveries		246			21			404			—		671
	Provision		3,491			2			2,996			11		6,500

	Ending Balance	$	48,253		$	16,157		$	10,442		$	86	$	74,938


		Nine Months Ended September 30, 2013
		Commercial			Real estate			Consumer			Leases		Total
	Allowance for loan losses:
	Beginning balance	$	43,390		$	15,506		$	12,470		$	60	$	71,426
	Charge-offs		(3,015	)		(533	)		(9,265	)		—		(12,813	)
	Recoveries		761			37			2,027			—		2,825
	Provision		7,117			1,147			5,210			26		13,500

	Ending Balance	$	48,253		$	16,157		$	10,442		$	86	$	74,938

	Ending Balance: individually evaluated for impairment	$	3,301		$	1,412		$	—		$	—	$	4,713
	Ending Balance: collectively evaluated for impairment		44,952			14,745			10,442			86		70,225
	Loans:
	Ending Balance: loans	$	3,494,603		$	2,604,956		$	381,704		$	25,639	$	6,506,902
	Ending Balance: individually evaluated for impairment		14,835			15,852			30			—		30,717
	Ending Balance: collectively evaluated for impairment		3,479,768			2,589,104			381,674			25,639		6,476,185
Analysis of Impaired Loans	'
	This table provides an analysis of impaired loans by class at September 30, 2014 and December 31, 2013 (in thousands):



		30-Sep-14
		Unpaid			Recorded			Recorded			Total		Related			Average
		Principal			Investment			Investment			Recorded		Allowance			Recorded
		Balance			with No			with			Investment					Investment
					Allowance			Allowance
	Commercial:
	Commercial	$	23,599		$	8,710		$	10,466		$	19,176	$	2,252		$	15,762
	Commercial – credit card		—			—			—			—		—			—
	Real estate:
	Real estate – construction		1,499			825			123			948		123			928
	Real estate – commercial		13,758			4,816			6,652			11,468		1,245			12,035
	Real estate – residential		1,224			1,051			—			1,051		—			1,030
	Real estate – HELOC		—			—			—			—		—			—
	Consumer:
	Consumer – credit card		—			—			—			—		—			—
	Consumer – other		17			17			—			17		—			15
	Leases		—			—			—			—		—			—

	Total	$	40,097		$	15,419		$	17,241		$	32,660	$	3,620		$	29,770


		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 and nine months ended September 30, 2014 (in thousands):


		Three Months Ended September 30, 2014									Nine Months Ended September 30, 2014
		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		1			178			178			1		178			178
	Real estate – residential		1			67			67			4		277			301
	Real estate – HELOC		—			—			—			—		—			—
	Consumer:
	Consumer – credit card		—			—			—			—		—			—
	Consumer – other		—			—			—			—		—			—
	Leases		—			—			—			—		—			—

	Total		2		$	245		$	245			6	$	924		$	948


	This table provides a summary of loans restructured by class for the three and nine months ended September 30, 2013 (in thousands):


		Three Months Ended September 30, 2013									Nine Months Ended September 30, 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		$	182		$	182			3	$	1,311		$	1,249
	Commercial – credit card		—			—			—			—		—			—
	Real estate:
	Real estate – construction		—			—			—			—		—			—
	Real estate – commercial		—			—			—			1		937			937
	Real estate – residential		—			—			—			1		425			425
	Real estate – HELOC		—			—			—			—		—			—
	Consumer:
	Consumer – credit card		—			—			—			—		—			—
	Consumer – other		—			—			—			—		—			—
	Leases		—			—			—			—		—			—

	Total		1		$	182		$	182			5	$	2,673		$	2,611

Securities_Tables

Securities (Tables)	9 Months Ended
Securities (Tables)	Sep. 30, 2014
Securities Available for Sale	'
	This table provides detailed information about securities available for sale at September 30, 2014 and December 31, 2013 (in thousands):


				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	September 30, 2014
	U.S. Treasury	$	510,650	$	472		$	(905	)	$	510,217
	U.S. Agencies		986,247		1,029			(1,853	)		985,423
	Mortgage-backed		3,182,642		23,396			(39,665	)		3,166,373
	State and political subdivisions		1,944,165		27,390			(5,874	)		1,965,681
	Corporates		133,312		5			(1,208	)		132,109

	Total	$	6,757,016	$	52,292		$	(49,505	)	$	6,759,803


				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	December 31, 2013
	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 September 30, 2014 and December 31, 2013 (in thousands):


		Less than 12 months					12 months or more						Total
		Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
		Fair Value		Losses			Fair Value			Losses			Fair Value		Losses
	September 30, 2014
	Description of Securities
	U.S. Treasury	$	215,360	$	(404	)	$	29,471		$	(501	)	$	244,831	$	(905	)
	U.S. Agencies		407,420		(604	)		117,295			(1,249	)		524,715		(1,853	)
	Mortgage-backed		1,474,931		(23,122	)		533,596			(16,543	)		2,008,527		(39,665	)
	State and political subdivisions		177,480		(410	)		294,762			(5,464	)		472,242		(5,874	)
	Corporates		42,072		(246	)		86,349			(962	)		128,421		(1,208	)

	Total temporarily-impaired debt securities available for sale	$	2,317,263	$	(24,786	)	$	1,061,473		$	(24,719	)	$	3,378,736	$	(49,505	)


		Less than 12 months					12 months or more						Total
		Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
		Fair Value		Losses			Fair Value			Losses			Fair Value		Losses
	December 31, 2013
	Description of Securities
	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 September 30, 2014 and December 31, 2013 (in thousands):


				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	September 30, 2014
	State and political subdivisions	$	237,961	$	32,329		$	—		$	270,290

	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 September 30, 2014 and December 31, 2013 (in thousands):


				Gross			Gross
		Amortized		Unrealized			Unrealized			Fair
		Cost		Gains			Losses			Value
	September 30, 2014
	Federal Reserve Bank stock	$	16,279	$	—		$	—		$	16,279
	Other securities – marketable		—		19,472			—			19,472
	Other securities – non-marketable		29,839		5,602			—			35,441

	Total Federal Reserve Bank stock and other	$	46,118	$	25,074		$	—		$	71,192

	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 September 30, 2014 (in thousands):


		Amortized		Fair
		Cost		Value
	Due in 1 year or less	$	466,001	$	467,789
	Due after 1 year through 5 years		2,299,824		2,311,028
	Due after 5 years through 10 years		687,956		696,024
	Due after 10 years		120,593		118,589

	Total		3,574,374		3,593,430
	Mortgage-backed securities		3,182,642		3,166,373

	Total securities available for sale	$	6,757,016	$	6,759,803

Held-to-maturity Securities [Member]	'
Contractual Maturity Information	'
	The following table presents contractual maturity information for securities held to maturity at September 30, 2014 (in thousands):

		Amortized		Fair
		Cost		Value
	Due in 1 year or less	$	46	$	52
	Due after 1 year through 5 years		26,650		30,271
	Due after 5 years through 10 years		132,268		150,238
	Due after 10 years		78,997		89,729

	Total securities held to maturity	$	237,961	$	270,290

Goodwill_and_Other_Intangibles1

Goodwill and Other Intangibles (Tables)	9 Months Ended
Goodwill and Other Intangibles (Tables)	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes in Carrying Amount of Goodwill	'
	Changes in the carrying amount of goodwill for the periods ended September 30, 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 September 30, 2014	$	142,753		$47,529	$	19,476	$	209,758
Changes in Intangible Assets	'
	Following are the finite-lived intangible assets that continue to be subject to amortization as of September 30, 2014 and December 31, 2013 (in thousands):


		Gross Carrying		Accumulated		Net Carrying
		Amount		Amortization		Amount
	September 30, 2014
	Core deposit intangible assets	$	36,497	$	32,484	$	4,013
	Customer relationships		104,560		62,299		42,261
	Other intangible assets		3,247		2,555		692

	Total intangible assets	$	144,304	$	97,338	$	46,966

	December 31, 2013
	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				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Aggregate amortization expense		$3,043		$3,245	$	9,219	$	10,054
Estimated Amortization Expense of Intangible Assets	'
	Estimated amortization expense of intangible assets on future years (in thousands):


	For the three months ending December 31, 2014	$	2,974
	For the year ending December 31, 2015		9,636
	For the year ending December 31, 2016		8,428
	For the year ending December 31, 2017		7,185
	For the year ending December 31, 2018		4,994
	For the year ending December 31, 2019		4,204

Commitments_Contingencies_and_1

Commitments, Contingencies and Guarantees (Tables)	9 Months Ended
Commitments, Contingencies and Guarantees (Tables)	Sep. 30, 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):


		September 30,		December 31,
		2014		2013
	Commitments to extend credit for loans (excluding credit card loans)	$	3,167,398	$	2,690,268
	Commitments to extend credit under credit card loans		2,384,213		2,215,278
	Commercial letters of credit		1,415		5,949
	Standby letters of credit		374,109		356,054
	Forward foreign exchange contracts		66,939		21,525
	Spot foreign exchange contracts		1,425		8,001

Business_Segment_Reporting_Tab

Business Segment Reporting (Tables)	9 Months Ended
Business Segment Reporting (Tables)	Sep. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Financial Results	'
	Segment financial results were as follows (in thousands):


			Three Months Ended September 30, 2014
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	72,906		$	13,442		$	—			$	1,178		$	87,526
	Provision for loan losses			2,446			2,054			—				—			4,500
	Noninterest income			48,385			21,579			33,919				22,592			126,475
	Noninterest expense			99,307			22,056			20,910				19,188			161,461

	Income before taxes			19,538			10,911			13,009				4,582			48,040
	Income tax expense			5,081			2,795			3,350				1,184			12,410

	Net income		$	14,457		$	8,116		$	9,659			$	3,398		$	35,630

	Average assets		$	11,639,000		$	2,823,000		$	74,000			$	1,102,000		$	15,638,000


			Three Months Ended September 30, 2013
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	73,419		$	11,587		$	(11	)		$	550		$	85,545
	Provision for loan losses			1,833			4,667			—				—			6,500
	Noninterest income			48,945			18,409			33,842				20,429			121,625
	Noninterest expense			93,150			21,658			21,054				17,201			153,063

	Income before taxes			27,381			3,671			12,777				3,778			47,607
	Income tax expense			6,922			1,283			3,506				1,464			13,175

	Net income		$	20,459		$	2,388		$	9,271			$	2,314		$	34,432

	Average assets		$	11,128,000		$	1,727,000		$	76,000			$	1,993,000		$	14,924,000


			Nine Months Ended September 30, 2014
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	216,508		$	38,220		$	(3	)		$	4,416		$	259,141
	Provision for loan losses			7,558			6,442			—				—			14,000
	Noninterest income			151,843			62,998			102,014				66,585			383,440
	Noninterest expense			308,013			67,680			68,848				55,672			500,213

	Income before taxes			52,780			27,096			33,163				15,329			128,368
	Income tax expense			14,326			7,272			8,887				4,168			34,653

	Net income		$	38,454		$	19,824		$	24,276			$	11,161		$	93,715

	Average assets		$	11,914,000		$	2,350,000		$	74,000			$	1,583,000		$	15,921,000

			Nine Months Ended September 30, 2013
			Bank			Payment			Institutional				Asset			Total
						Solutions			Investment				Servicing
									Management
	Net interest income		$	211,238		$	34,327		$	(22	)		$	1,812		$	247,355
	Provision for loan losses			3,770			9,730			—				—			13,500
	Noninterest income			148,129			56,486			91,550				60,061			356,226
	Noninterest expense			277,226			63,626			58,754				54,146			453,752

	Income before taxes			78,371			17,457			32,774				7,727			136,329
Income tax expense			19,629			5,464			8,880				3,054			37,027

Net income		$	58,742		$	11,993		$	23,894			$	4,673		$	99,302

Average assets		$	11,145,000		$	1,770,000		$	79,000			$	1,867,000		$	14,861,000

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Tables)	9 Months Ended
Derivatives and Hedging Activities (Tables)	Sep. 30, 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 September 30, 2014 and December 31, 2013 (in thousands):


		Asset Derivatives						Liability Derivatives
		September 30,			December 31,			September 30,			December 31,
		2014			2013			2014			2013
	Fair value
	Interest Rate Products:
	Derivatives not designated as hedging instruments	$	4,548		$	2,442		$	4,637		$	2,346
	Derivatives designated as hedging instruments		—			76			141			—

	Total	$	4,548		$	2,518		$	4,778		$	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 non-interest expense in the Consolidated Statements of Income related to the Company’s derivative asset and liability for the three and nine months ended September 30, 2014 and September 30, 2013 (in thousands):


		Amount of Gain (Loss) Recognized
		For the Three Months Ended						For the Nine Months Ended
		September 30,			September 30,			September 30,			September 30,
		2014			2013			2014			2013
	Interest Rate Products
	Derivatives not designated as hedging instruments	$	(133	)	$	(40	)	$	(185	)	$	114

	Total	$	(133	)	$	(40	)	$	(185	)	$	114

	Interest Rate Products
	Derivatives designated as hedging instruments
	Fair value adjustments on derivatives	$	19		$	—		$	(216	)	$	—
	Fair value adjustments on hedged items		(20	)		—			197			—

	Total	$	(1	)	$	—		$	(19	)	$	—

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
Fair Value Measurements (Tables)	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Assets Measured at Fair Value on Recurring Basis	'
	Assets measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013 (in thousands):


			Fair Value Measurement at September 30, 2014
	Description		September 30,				Quoted				Significant			Significant
			2014				Prices in				Other			Unobservable
							Active				Observable			Inputs
							Markets for				Inputs			(Level 3)
							Identical				(Level 2)
							Assets
							(Level 1)
	Assets
	U.S. Treasury		$	500			$	500			$	—		$	—
	U.S. Agencies			—				—				—			—
	Mortgage-backed			3,922				—				3,922			—
	State and political subdivisions			8,988				—				8,988			—
	Trading - other			18,380				18,380				—			—

	Trading securities			31,790				18,880				12,910			—

	U.S. Treasury			510,217				510,217				—			—
	U.S. Agencies			985,423				—				985,423			—
	Mortgage-backed			3,166,373				—				3,166,373			—
	State and political subdivisions			1,965,681				—				1,965,681			—
	Corporates			132,109				132,109				—			—

	Available for sale securities			6,759,803				642,326				6,117,477			—
	Company-owned life insurance			26,748				—				26,748			—
	Derivatives			4,548				—				4,548			—

	Total		$	6,822,889			$	661,206			$	6,161,683		$	—

	Liabilities
	Deferred compensation		$	26,188			$	26,188			$	—		$	—
	Contingent consideration liability			54,259				—				—			54,259
	Derivatives			4,778				—				4,778			—

	Total		$	85,225			$	26,188			$	4,778		$	54,259



			Fair Value Measurement at December 31, 2013
	Description		December 31,				Quoted Prices				Significant			Significant
			2013				in Active				Other			Unobservable
							Markets for				Observable			Inputs
							Identical				Inputs			(Level 3)
							Assets				(Level 2)
							(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 Balances of Contingent Consideration Liability	'
	The following table reconciles the beginning and ending balances of the contingent consideration liability for the nine months ended September 30, 2014 (in thousands):


			Nine Months Ended September 30,
			2014				2013
	Beginning Balance		$	46,201			$	51,163
	Contingency reserve			14,272				—
	Payment of contingent considerations on acquisitions			(13,725	)			(16,172	)
	Income from fair value adjustments			—				(138	)
	Expense from fair value adjustments			7,511				4,462

	Ending Balance		$	54,259			$	39,315

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
	Description		Valuation Techniques		Unobservable Inputs		Range
	Liabilities
	Contingent consideration liability		Discounted cash flows		Revenue growth percentage			1% - 98	%
Assets Measured at Fair Value on Non-Recurring Basis	'
	Assets measured at fair value on a non-recurring basis as of September 30, 2014 and December 31, 2013 (in thousands):


			Fair Value Measurement at September 30, 2014
	Description		September 30,				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 Nine
							(Level 1)									Months Ended
																September 30
	Impaired loans		$	13,621			$				$			$	13,621	$	632
	Other real estate owned			138				—				—			138	$	—

	Total		$	13,759			$				$			$	13,759	$	632



			Fair Value Measurement at December 31, 2013
	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	'
	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 September 30, 2014 and December 31, 2013 are as follows (in millions):


			Fair Value Measurement at September 30, 2014
			Carrying				Quoted Prices				Significant			Significant		Total
			Amount				in Active				Other			Unobservable		Estimated
							Markets for				Observable			Inputs		Fair Value
							Identical Assets				Inputs			(Level 3)
							(Level 1)				(Level 2)
	FINANCIAL ASSETS
	Securities held to maturity		$	238			$	—			$	270.3		$	—	$	270.3
	Federal Reserve Bank and other			71.2				—				71.2			—		71.2
	Loans (exclusive of allowance for loan loss)			7,104.90				—				7,136.30			—		7,136.30
	FINANCIAL LIABILITIES
	Time deposits			961.1				—				960.7			—		960.7
	Long-term debt			7.1				—				7.3			—		7.3
	OFF-BALANCE SHEET ARRANGEMENTS
	Commitments to extend credit for loans																4.3
	Commercial letters of credit																0.1
	Standby letters of credit																1.8


			Fair Value Measurement at December 31, 2013
			Carrying				Quoted Prices				Significant			Significant		Total
			Amount				in Active				Other			Unobservable		Estimated
							Markets for				Observable			Inputs		Fair Value
							Identical Assets				Inputs			(Level 3)
							(Level 1)				(Level 2)
	FINANCIAL ASSETS
	Securities held to maturity		$	209.8			$	—			$	231.5		$	—	$	231.5
	Federal Reserve Bank and other			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_Cash_and_Cash_Equiv

Summary of Cash and Cash Equivalents (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Accounting Policies [Abstract]	'	'	'	'
Due from the Federal Reserve	$824,264	'	$1,335,590	'
Cash and due from banks	395,956	521,001	604,592	'
Cash and cash equivalents at end of period	$1,220,220	$2,582,428	$1,940,182	$1,366,394

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended
	Oct. 17, 2013	Sep. 16, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accounting Policies [Abstract]	'	'	'	'	'	'
Due from certificates of deposit	'	'	$157,300,000	$22,300,000	$157,300,000	$22,300,000
Dilutive effect of common stock issuable upon exercise of options, shares	'	'	551,674	650,028	601,260	544,930
Anti-dilutive shares	'	'	250,911	'	250,911	270,839
Common Stock, issuance shares	'	3,900,000	'	'	'	'
Common stock issuance	'	201,200,000	'	'	'	201,177,000
Underwriters option description	'	'	'	'	'UMB granted the underwriters a 30-day option to purchase up to an additional 585,000 shares of common stock.	'
Shares allotted to underwriters upon issuance of options	'	585,000	'	'	'	'
Number of units underwriter exercised	585,000	'	'	'	'	'
Net proceeds from underwriting option	$30,200,000	'	'	'	'	'

Summary_of_Loan_Classes_and_Ag

Summary of Loan Classes and Aging of Past Due Loans (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	$14,196	$13,360	'
Greater than 90 Days Past Due and Accruing	4,678	3,218	'
Non- Accrual Loans	32,662	30,706	'
Total Past Due	51,536	47,284	'
Current	7,051,627	6,473,228	'
Total Loans	7,103,163	6,520,512	6,506,902
Commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	1,376	2,107	'
Greater than 90 Days Past Due and Accruing	199	135	'
Non- Accrual Loans	15,075	8,042	'
Total Past Due	16,650	10,284	'
Current	3,522,624	3,291,219	'
Total Loans	3,539,274	3,301,503	'
Commercial - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	293	362	'
Greater than 90 Days Past Due and Accruing	75	82	'
Non- Accrual Loans	44	38	'
Total Past Due	412	482	'
Current	129,612	102,788	'
Total Loans	130,024	103,270	'
Real estate - construction [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	2,380	186	'
Greater than 90 Days Past Due and Accruing	0	'	'
Non- Accrual Loans	948	934	'
Total Past Due	3,328	1,120	'
Current	242,477	151,755	'
Total Loans	245,805	152,875	'
Real estate - commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	3,050	3,611	'
Greater than 90 Days Past Due and Accruing	2,038	344	'
Non- Accrual Loans	15,267	19,213	'
Total Past Due	20,355	23,168	'
Current	1,786,570	1,678,983	'
Total Loans	1,806,925	1,702,151	'
Real estate - residential [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	869	1,257	'
Greater than 90 Days Past Due and Accruing	207	13	'
Non- Accrual Loans	567	868	'
Total Past Due	1,643	2,138	'
Current	315,183	287,218	'
Total Loans	316,826	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	157	880	'
Greater than 90 Days Past Due and Accruing	0	6	'
Non- Accrual Loans	115	210	'
Total Past Due	272	1,096	'
Current	629,224	565,032	'
Total Loans	629,496	566,128	'
Consumer - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	2,348	3,230	'
Greater than 90 Days Past Due and Accruing	1,962	2,448	'
Non- Accrual Loans	550	1,031	'
Total Past Due	4,860	6,709	'
Current	298,833	311,627	'
Total Loans	303,693	318,336	'
Consumer - other [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	3,723	1,727	'
Greater than 90 Days Past Due and Accruing	197	190	'
Non- Accrual Loans	96	370	'
Total Past Due	4,016	2,287	'
Current	87,904	60,625	'
Total Loans	91,920	62,912	'
Leases [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
30-89 Days Past Due and Accruing	0	'	'
Greater than 90 Days Past Due and Accruing	0	'	'
Non- Accrual Loans	0	'	'
Total Past Due	0	'	'
Current	39,200	23,981	'
Total Loans	$39,200	$23,981	$25,639

Loans_and_Allowance_for_Loan_L2

Loans and Allowance for Loan Losses - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Receivables [Abstract]	'	'	'
Proceeds from sales of loans held for sale	$51,880,000	$103,388,000	'
Non-accrual loans	32,662,000	'	30,706,000
Restructured loans	10,200,000	'	12,100,000
Loans 90 days past due and accruing	4,678,000	'	3,218,000
Commitments to lend to borrowers with loan modifications classified as TDR's	$428,000	'	'

Credit_Risk_Profile_by_Risk_Ra

Credit Risk Profile by Risk Rating (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	$7,103,163	$6,520,512	$6,506,902
Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	3,539,274	3,301,503	'
Commercial [Member] \| Non-watch list [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	3,263,847	3,041,224	'
Commercial [Member] \| Watch [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	61,424	110,932	'
Commercial [Member] \| Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	87,947	78,064	'
Commercial [Member] \| Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	126,056	71,283	'
Real estate - construction [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	245,805	152,875	'
Real estate - construction [Member] \| Non-watch list [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	243,513	151,359	'
Real estate - construction [Member] \| Watch [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	186	210	'
Real estate - construction [Member] \| Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	758	0	'
Real estate - construction [Member] \| Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	1,348	1,306	'
Real estate - commercial [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	1,806,925	1,702,151	'
Real estate - commercial [Member] \| Non-watch list [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	1,689,958	1,565,894	'
Real estate - commercial [Member] \| Watch [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	46,509	76,647	'
Real estate - commercial [Member] \| Special Mention [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	24,677	19,876	'
Real estate - commercial [Member] \| Substandard [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile by Risk Rating	$45,781	$39,734	'

Credit_Risk_Profile_Based_on_P

Credit Risk Profile Based on Payment Activity (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	$7,103,163	$6,520,512	$6,506,902
Commercial - credit card [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	130,024	103,270	'
Commercial - credit card [Member] \| Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	129,980	103,232	'
Commercial - credit card [Member] \| Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	44	38	'
Real estate - residential [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	316,826	289,356	'
Real estate - residential [Member] \| Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	316,259	288,488	'
Real estate - residential [Member] \| Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	567	868	'
Real estate - Home Equity Line of Credit [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	629,496	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	629,381	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	115	210	'
Consumer - credit card [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	303,693	318,336	'
Consumer - credit card [Member] \| Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	303,143	317,305	'
Consumer - credit card [Member] \| Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	550	1,031	'
Consumer - other [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	91,920	62,912	'
Consumer - other [Member] \| Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	91,824	62,542	'
Consumer - other [Member] \| Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	96	370	'
Leases [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	39,200	23,981	25,639
Leases [Member] \| Performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	39,200	23,981	'
Leases [Member] \| Non-performing [Member]	'	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'	'
Credit Risk Profile Based on Payment Activity	$0	'	'

Rollforward_of_Allowance_for_L

Rollforward of Allowance for Loan Losses by Portfolio Segment (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'
Beginning balance	$76,802	$71,647	$74,751	$71,426	'
Charge-offs	-4,835	-3,880	-14,099	-12,813	'
Recoveries	849	671	2,664	2,825	'
Provision	4,500	6,500	14,000	13,500	'
Ending Balance	77,316	74,938	77,316	74,938	'
Ending Balance: individually evaluated for impairment, allowances	3,620	4,713	3,620	4,713	4,252
Ending Balance: collectively evaluated for impairment, allowances	73,696	70,225	73,696	70,225	'
Total Loans	7,103,163	6,506,902	7,103,163	6,506,902	6,520,512
Ending Balance: individually evaluated for impairment, loans	32,660	30,717	32,660	30,717	'
Ending Balance: collectively evaluated for impairment, loans	7,070,503	6,476,185	7,070,503	6,476,185	'
Commercial [Member]	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'
Beginning balance	52,433	45,108	48,886	43,390	'
Charge-offs	-2,033	-592	-4,980	-3,015	'
Recoveries	396	246	664	761	'
Provision	3,983	3,491	10,209	7,117	'
Ending Balance	54,779	48,253	54,779	48,253	'
Ending Balance: individually evaluated for impairment, allowances	2,252	3,301	2,252	3,301	'
Ending Balance: collectively evaluated for impairment, allowances	52,527	44,952	52,527	44,952	'
Total Loans	3,669,298	3,494,603	3,669,298	3,494,603	'
Ending Balance: individually evaluated for impairment, loans	19,176	14,835	19,176	14,835	'
Ending Balance: collectively evaluated for impairment, loans	3,650,122	3,479,768	3,650,122	3,479,768	'
Real Estate [Member]	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'
Beginning balance	14,217	16,296	15,342	15,506	'
Charge-offs	-57	-162	-238	-533	'
Recoveries	8	21	25	37	'
Provision	-1,515	2	-2,476	1,147	'
Ending Balance	12,653	16,157	12,653	16,157	'
Ending Balance: individually evaluated for impairment, allowances	1,368	1,412	1,368	1,412	'
Ending Balance: collectively evaluated for impairment, allowances	11,285	14,745	11,285	14,745	'
Total Loans	2,999,052	2,604,956	2,999,052	2,604,956	'
Ending Balance: individually evaluated for impairment, loans	13,467	15,852	13,467	15,852	'
Ending Balance: collectively evaluated for impairment, loans	2,985,585	2,589,104	2,985,585	2,589,104	'
Consumer [Member]	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'
Beginning balance	10,074	10,168	10,447	12,470	'
Charge-offs	-2,745	-3,126	-8,881	-9,265	'
Recoveries	445	404	1,975	2,027	'
Provision	1,964	2,996	6,197	5,210	'
Ending Balance	9,738	10,442	9,738	10,442	'
Ending Balance: individually evaluated for impairment, allowances	0	'	0	'	'
Ending Balance: collectively evaluated for impairment, allowances	9,738	10,442	9,738	10,442	'
Total Loans	395,613	381,704	395,613	381,704	'
Ending Balance: individually evaluated for impairment, loans	17	30	17	30	'
Ending Balance: collectively evaluated for impairment, loans	395,596	381,674	395,596	381,674	'
Leases [Member]	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'
Beginning balance	78	75	76	60	'
Charge-offs	0	'	0	'	'
Recoveries	0	'	0	'	'
Provision	68	11	70	26	'
Ending Balance	146	86	146	86	'
Ending Balance: individually evaluated for impairment, allowances	0	'	0	'	'
Ending Balance: collectively evaluated for impairment, allowances	146	86	146	86	'
Total Loans	39,200	25,639	39,200	25,639	23,981
Ending Balance: individually evaluated for impairment, loans	0	'	0	'	'
Ending Balance: collectively evaluated for impairment, loans	$39,200	$25,639	$39,200	$25,639	'

Analysis_of_Impaired_Loans_by_

Analysis of Impaired Loans by Class (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	$40,097	$34,650	'
Recorded Investment with No Allowance	15,419	10,441	'
Recorded Investment with Allowance	17,241	19,748	'
Total Recorded Investment	32,660	30,189	'
Related Allowance	3,620	4,252	4,713
Average Recorded Investment	29,770	27,639	'
Commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	23,599	17,227	'
Recorded Investment with No Allowance	8,710	3,228	'
Recorded Investment with Allowance	10,466	11,407	'
Total Recorded Investment	19,176	14,635	'
Related Allowance	2,252	2,882	'
Average Recorded Investment	15,762	14,791	'
Commercial - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	0	'	'
Recorded Investment with No Allowance	0	'	'
Recorded Investment with Allowance	0	'	'
Total Recorded Investment	0	'	'
Related Allowance	0	'	'
Average Recorded Investment	0	'	'
Real estate - construction [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	1,499	1,408	'
Recorded Investment with No Allowance	825	810	'
Recorded Investment with Allowance	123	123	'
Total Recorded Investment	948	933	'
Related Allowance	123	'	'
Average Recorded Investment	928	1,186	'
Real estate - commercial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	13,758	14,686	'
Recorded Investment with No Allowance	4,816	5,305	'
Recorded Investment with Allowance	6,652	8,218	'
Total Recorded Investment	11,468	13,523	'
Related Allowance	1,245	94	'
Average Recorded Investment	12,035	10,506	'
Real estate - residential [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	1,224	1,317	'
Recorded Investment with No Allowance	1,051	1,087	'
Recorded Investment with Allowance	0	'	'
Total Recorded Investment	1,051	1,087	'
Related Allowance	0	1,276	'
Average Recorded Investment	1,030	1,122	'
Real estate - Home Equity Line of Credit [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	0	'	'
Recorded Investment with No Allowance	0	'	'
Recorded Investment with Allowance	0	'	'
Total Recorded Investment	0	'	'
Related Allowance	0	'	'
Average Recorded Investment	0	'	'
Consumer - credit card [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	0	'	'
Recorded Investment with No Allowance	0	'	'
Recorded Investment with Allowance	0	'	'
Total Recorded Investment	0	'	'
Related Allowance	0	'	'
Average Recorded Investment	0	'	'
Consumer - other [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	17	12	'
Recorded Investment with No Allowance	17	11	'
Recorded Investment with Allowance	0	'	'
Total Recorded Investment	17	11	'
Related Allowance	0	'	'
Average Recorded Investment	15	34	'
Leases [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Unpaid Principal Balance	0	'	'
Recorded Investment with No Allowance	0	'	'
Recorded Investment with Allowance	0	'	'
Total Recorded Investment	0	'	'
Related Allowance	0	'	'
Average Recorded Investment	$0	'	'

Summary_of_Loans_Restructured_

Summary of Loans Restructured by Class (Detail) (Troubled Debt Restructuring [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	Contract	Contract	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	2	1	6	5
Pre-Modification Outstanding Recorded Investment	$245	$182	$924	$2,673
Post-Modification Outstanding Recorded Investment	245	182	948	2,611
Commercial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	1	1	3
Pre-Modification Outstanding Recorded Investment	0	182	469	1,311
Post-Modification Outstanding Recorded Investment	0	182	469	1,249
Commercial - credit card [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	'	0	'
Pre-Modification Outstanding Recorded Investment	0	'	0	'
Post-Modification Outstanding Recorded Investment	0	'	0	'
Real estate - construction [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	'	0	'
Pre-Modification Outstanding Recorded Investment	0	'	0	'
Post-Modification Outstanding Recorded Investment	0	'	0	'
Real estate - commercial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	1	'	1	1
Pre-Modification Outstanding Recorded Investment	178	'	178	937
Post-Modification Outstanding Recorded Investment	178	'	178	937
Real estate - residential [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	1	'	4	1
Pre-Modification Outstanding Recorded Investment	67	'	277	425
Post-Modification Outstanding Recorded Investment	67	'	301	425
Real estate - Home Equity Line of Credit [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	'	0	'
Pre-Modification Outstanding Recorded Investment	0	'	0	'
Post-Modification Outstanding Recorded Investment	0	'	0	'
Consumer - credit card [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	'	0	'
Pre-Modification Outstanding Recorded Investment	0	'	0	'
Post-Modification Outstanding Recorded Investment	0	'	0	'
Consumer - other [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	'	0	'
Pre-Modification Outstanding Recorded Investment	0	'	0	'
Post-Modification Outstanding Recorded Investment	0	'	0	'
Leases [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	0	'	0	'
Pre-Modification Outstanding Recorded Investment	0	'	0	'
Post-Modification Outstanding Recorded Investment	$0	'	$0	'

Securities_Available_for_Sale_

Securities Available for Sale (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	$6,757,016	$6,814,712
Securities available for sale, Gross Unrealized Gains	52,292	51,414
Securities available for sale, Gross Unrealized Losses	-49,505	-103,715
Total securities available for sale, Fair Value	6,759,803	6,762,411
U.S. Treasury [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	510,650	110,789
Securities available for sale, Gross Unrealized Gains	472	284
Securities available for sale, Gross Unrealized Losses	-905	-873
Total securities available for sale, Fair Value	510,217	110,200
U.S. Agencies [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	986,247	1,258,176
Securities available for sale, Gross Unrealized Gains	1,029	2,793
Securities available for sale, Gross Unrealized Losses	-1,853	-3,306
Total securities available for sale, Fair Value	985,423	1,257,663
Mortgage-backed [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	3,182,642	2,984,963
Securities available for sale, Gross Unrealized Gains	23,396	23,942
Securities available for sale, Gross Unrealized Losses	-39,665	-64,339
Total securities available for sale, Fair Value	3,166,373	2,944,566
State and political subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	1,944,165	2,003,509
Securities available for sale, Gross Unrealized Gains	27,390	23,493
Securities available for sale, Gross Unrealized Losses	-5,874	-31,756
Total securities available for sale, Fair Value	1,965,681	1,995,246
Corporates [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale, Amortized Cost	133,312	457,275
Securities available for sale, Gross Unrealized Gains	5	902
Securities available for sale, Gross Unrealized Losses	-1,208	-3,441
Total securities available for sale, Fair Value	$132,109	$454,736

Summary_of_Contractual_Maturit

Summary of Contractual Maturity Information for Securities Available for Sale (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'	'
Due in 1 year or less, Amortized Cost	$466,001	'
Due after 1 year through 5 years, Amortized Cost	2,299,824	'
Due after 5 years through 10 years, Amortized Cost	687,956	'
Due after 10 years, Amortized Cost	120,593	'
Total, Amortized Cost	3,574,374	'
Mortgage-backed securities, Amortized Cost	3,182,642	'
Securities available for sale, Amortized Cost	6,757,016	6,814,712
Due in 1 year or less, Fair Value	467,789	'
Due after 1 year through 5 years, Fair Value	2,311,028	'
Due after 5 years through 10 years, Fair Value	696,024	'
Due after 10 years, Fair Value	118,589	'
Total, Fair Value	3,593,430	'
Mortgage-backed securities, Fair Value	3,166,373	'
Total securities available for sale, Fair Value	$6,759,803	$6,762,411

Securities_Additional_Informat

Securities - Additional Information (Detail) (USD $)	9 Months Ended
Securities - Additional Information (Detail) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Proceeds from sales of securities available for sale	$410,580,000	$678,522,000	'
Gross realized gains from securities	4,100,000	8,800,000	'
Gross realized losses from securities	11,000	220,000	'
Sales of securities held to maturity	0	0	'
Unrealized gains on trading securities	38,900	14,000	'
Fair value of marketable securities	19,500,000	'	16,600,000
Fair value of non-marketable securities	10,200,000	'	4,700,000
Us Government and Other Public Deposit [Member]	'	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Pledged securities for deposits	5,100,000,000	'	5,900,000,000
Federal Reserve Discount Window [Member]	'	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Pledged securities for deposits	$1,400,000,000	'	$1,700,000,000

Gross_Unrealized_Losses_and_Fa

Gross Unrealized Losses and Fair Value of Investment Securities Available for Sale (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	$2,317,263	$3,595,354
Less than 12 months, Unrealized Losses	-24,786	-92,244
12 months or more, Fair Value	1,061,473	227,554
12 months or more, Unrealized Losses	-24,719	-11,471
Total Fair Value	3,378,736	3,822,908
Total Unrealized Losses	-49,505	-103,715
U.S. Treasury [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	215,360	39,822
Less than 12 months, Unrealized Losses	-404	-873
12 months or more, Fair Value	29,471	'
12 months or more, Unrealized Losses	-501	'
Total Fair Value	244,831	39,822
Total Unrealized Losses	-905	-873
U.S. Agencies [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	407,420	675,509
Less than 12 months, Unrealized Losses	-604	-3,130
12 months or more, Fair Value	117,295	9,824
12 months or more, Unrealized Losses	-1,249	-176
Total Fair Value	524,715	685,333
Total Unrealized Losses	-1,853	-3,306
Mortgage-backed [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	1,474,931	1,945,964
Less than 12 months, Unrealized Losses	-23,122	-60,719
12 months or more, Fair Value	533,596	89,147
12 months or more, Unrealized Losses	-16,543	-3,620
Total Fair Value	2,008,527	2,035,111
Total Unrealized Losses	-39,665	-64,339
State and political subdivisions [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	177,480	662,225
Less than 12 months, Unrealized Losses	-410	-25,064
12 months or more, Fair Value	294,762	87,061
12 months or more, Unrealized Losses	-5,464	-6,692
Total Fair Value	472,242	749,286
Total Unrealized Losses	-5,874	-31,756
Corporates [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Less than 12 months, Fair Value	42,072	271,834
Less than 12 months, Unrealized Losses	-246	-2,458
12 months or more, Fair Value	86,349	41,522
12 months or more, Unrealized Losses	-962	-983
Total Fair Value	128,421	313,356
Total Unrealized Losses	($1,208)	($3,441)

Securities_Held_to_Maturity_De

Securities Held to Maturity (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]	'	'
Held to Maturity, Amortized Cost	$237,961	$209,770
Held to Maturity, Fair value	270,290	231,510
State and political subdivisions [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Held to Maturity, Amortized Cost	237,961	209,770
Held to Maturity, Gross Unrealized Gains	32,329	21,740
Held to Maturity, Gross Unrealized Losses	0	'
Held to Maturity, Fair value	$270,290	$231,510

Contractual_Maturity_Informati

Contractual Maturity Information for Securities Held to Maturity (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'	'
Due in 1 year or less, Amortized Cost	$46	'
Due after 1 year through 5 years, Amortized Cost	26,650	'
Due after 5 years through 10 years, Amortized Cost	132,268	'
Due after 10 years, Amortized Cost	78,997	'
Total securities held to maturity, Amortized Cost	237,961	209,770
Due in 1 year or less, Fair Value	52	'
Due after 1 year through 5 years, Fair Value	30,271	'
Due after 5 years through 10 years, Fair Value	150,238	'
Due after 10 years, Fair Value	89,729	'
Total securities held to maturity, Fair Value	$270,290	$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 $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	$46,118	$33,438
Gross Unrealized Gains	25,074	17,044
Gross Unrealized Losses	0	'
Fair Value	71,192	50,482
Federal Reserve Bank Stock [Member]	'	'
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	16,279	16,279
Gross Unrealized Gains	0	'
Gross Unrealized Losses	0	'
Fair Value	16,279	16,279
Other securities - marketable [Member]	'	'
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	0	20
Gross Unrealized Gains	19,472	16,612
Gross Unrealized Losses	0	'
Fair Value	19,472	16,632
Other securities - non-marketable [Member]	'	'
Schedule of Other Securities [Line Items]	'	'
Amortized Cost	29,839	17,139
Gross Unrealized Gains	5,602	432
Gross Unrealized Losses	0	'
Fair Value	$35,441	$17,571

Changes_in_Carrying_Amount_of_

Changes in Carrying Amount of Goodwill (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
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 $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$144,304	$143,704
Accumulated Amortization	97,338	88,119
Net Carrying Amount	46,966	55,585
Core deposit intangible assets [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	36,497	36,497
Accumulated Amortization	32,484	31,674
Net Carrying Amount	4,013	4,823
Customer relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	104,560	103,960
Accumulated Amortization	62,299	54,062
Net Carrying Amount	42,261	49,898
Other intangible assets [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	3,247	3,247
Accumulated Amortization	2,555	2,383
Net Carrying Amount	$692	$864

Aggregate_Amortization_Expense

Aggregate Amortization Expense Recognized (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'
Aggregate amortization expense	$3,043	$3,245	$9,219	$10,054

Estimated_Amortization_Expense

Estimated Amortization Expense of Intangible Assets (Detail) (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
For the three months ending December 31, 2014	$2,974
For the year ending December 31, 2015	9,636
For the year ending December 31, 2016	8,428
For the year ending December 31, 2017	7,185
For the year ending December 31, 2018	4,994
For the year ending December 31, 2019	$4,204

Notional_Amount_of_OffBalance_

Notional Amount of Off-Balance Sheet Financial Instruments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
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	$3,167,398	$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	2,384,213	2,215,278
Commercial letters of credit [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	1,415	5,949
Standby letters of credit [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	374,109	356,054
Forward foreign exchange contracts [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	66,939	21,525
Spot foreign exchange contracts [Member]	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'
Contract or notional amount of off-balance sheet financial instruments	$1,425	$8,001

Business_Segment_Reporting_Add

Business Segment Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
	Segment
Segment Reporting [Abstract]	'
Number of reportable segments	4

Schedule_of_Segment_Financial_

Schedule of Segment Financial Results (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	$87,526	$85,545	$259,141	$247,355
Provision for loan losses	4,500	6,500	14,000	13,500
Noninterest income	126,475	121,625	383,440	356,226
Noninterest expense	161,461	153,063	500,213	453,752
Income before income taxes	48,040	47,607	128,368	136,329
Income tax expense	12,410	13,175	34,653	37,027
Net Income	35,630	34,432	93,715	99,302
Average assets	15,638,000	14,924,000	15,921,000	14,861,000
Bank [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	72,906	73,419	216,508	211,238
Provision for loan losses	2,446	1,833	7,558	3,770
Noninterest income	48,385	48,945	151,843	148,129
Noninterest expense	99,307	93,150	308,013	277,226
Income before income taxes	19,538	27,381	52,780	78,371
Income tax expense	5,081	6,922	14,326	19,629
Net Income	14,457	20,459	38,454	58,742
Average assets	11,639,000	11,128,000	11,914,000	11,145,000
Payment Solutions [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	13,442	11,587	38,220	34,327
Provision for loan losses	2,054	4,667	6,442	9,730
Noninterest income	21,579	18,409	62,998	56,486
Noninterest expense	22,056	21,658	67,680	63,626
Income before income taxes	10,911	3,671	27,096	17,457
Income tax expense	2,795	1,283	7,272	5,464
Net Income	8,116	2,388	19,824	11,993
Average assets	2,823,000	1,727,000	2,350,000	1,770,000
Institutional Investment Management [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	'	-11	-3	-22
Noninterest income	33,919	33,842	102,014	91,550
Noninterest expense	20,910	21,054	68,848	58,754
Income before income taxes	13,009	12,777	33,163	32,774
Income tax expense	3,350	3,506	8,887	8,880
Net Income	9,659	9,271	24,276	23,894
Average assets	74,000	76,000	74,000	79,000
Asset Servicing [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	1,178	550	4,416	1,812
Noninterest income	22,592	20,429	66,585	60,061
Noninterest expense	19,188	17,201	55,672	54,146
Income before income taxes	4,582	3,778	15,329	7,727
Income tax expense	1,184	1,464	4,168	3,054
Net Income	3,398	2,314	11,161	4,673
Average assets	$1,102,000	$1,993,000	$1,583,000	$1,867,000

Summary_of_Fair_Value_of_Deriv

Summary of Fair Value of Derivative Assets and Liabilities (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]	'	'
Asset Derivatives, Fair value	$4,548	$2,518
Liability Derivatives, Fair value	4,778	2,346
Derivatives not Designated as Hedging Instruments [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Asset Derivatives, Fair value	4,548	2,442
Liability Derivatives, Fair value	4,637	2,346
Designated as Hedging Instrument [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Asset Derivatives, Fair value	0	76
Liability Derivatives, Fair value	$141	'

Derivatives_and_Hedging_Activi2

Derivatives and Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	Derivative	Sep. 30, 2013	Derivative	Sep. 30, 2013
Derivative [Line Items]	'	'	'	'
Net loss in other noninterest expense related to hedge ineffectiveness	($1,000)	'	($19,000)	'
Termination value of derivatives in net liability position	24,000	'	24,000	'
Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Notional amount of interest rate swaps	6,700,000	'	6,700,000	'
Number of interest rate swaps	1	'	1	'
Interest Rate Swap [Member] \| Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative [Line Items]	'	'	'	'
Notional amount of interest rate swaps	343,300,000	'	343,300,000	'
Number of interest rate swaps	28	'	28	'
Gain (loss) related to changes in fair value of swaps	($133,000)	($40,000)	($185,000)	$114,000

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		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative Instruments	($133)	($40)	($185)	$114
Designated as Hedging Instrument [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative Instruments	-1	'	-19	'
Designated as Hedging Instrument [Member] \| Fair value adjustments on derivatives [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative Instruments	19	'	-216	'
Designated as Hedging Instrument [Member] \| Fair value adjustments on hedged items [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Derivative Instruments	($20)	'	$197	'

Assets_Measured_at_Fair_Value_

Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	$31,790	$28,464	'	'
Available for sale securities	6,759,803	6,762,411	'	'
Derivatives	4,548	2,518	'	'
Contingent consideration liability	54,259	46,201	39,315	51,163
Derivatives	4,778	2,346	'	'
Fair Value Measurement, Recurring [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	31,790	28,464	'	'
Available for sale securities	6,759,803	6,762,411	'	'
Company-owned life insurance	26,748	19,619	'	'
Derivatives	4,548	2,518	'	'
Total	6,822,889	6,813,012	'	'
Deferred compensation	26,188	19,825	'	'
Contingent consideration liability	54,259	46,201	'	'
Derivatives	4,778	2,346	'	'
Total	85,225	68,372	'	'
Fair Value Measurement, Recurring [Member] \| Trading - other [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	18,380	24,477	'	'
Fair Value Measurement, Recurring [Member] \| U.S. Treasury [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	500	400	'	'
Available for sale securities	510,217	110,200	'	'
Fair Value Measurement, Recurring [Member] \| U.S. Agencies [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	0	'	'	'
Available for sale securities	985,423	1,257,663	'	'
Fair Value Measurement, Recurring [Member] \| Mortgage-backed [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	3,922	515	'	'
Available for sale securities	3,166,373	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	8,988	3,072	'	'
Available for sale securities	1,965,681	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	132,109	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	18,880	24,877	'	'
Available for sale securities	642,326	564,936	'	'
Company-owned life insurance	0	'	'	'
Derivatives	0	'	'	'
Total	661,206	589,813	'	'
Deferred compensation	26,188	19,825	'	'
Contingent consideration liability	0	'	'	'
Derivatives	0	'	'	'
Total	26,188	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	18,380	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	500	400	'	'
Available for sale securities	510,217	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	0	'	'	'
Available for sale securities	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	132,109	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	12,910	3,587	'	'
Available for sale securities	6,117,477	6,197,475	'	'
Company-owned life insurance	26,748	19,619	'	'
Derivatives	4,548	2,518	'	'
Total	6,161,683	6,223,199	'	'
Deferred compensation	0	'	'	'
Contingent consideration liability	0	'	'	'
Derivatives	4,778	2,346	'	'
Total	4,778	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	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	0	'	'	'
Available for sale securities	985,423	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	3,922	515	'	'
Available for sale securities	3,166,373	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	8,988	3,072	'	'
Available for sale securities	1,965,681	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	0	'	'	'
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value Measurement, Recurring [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'	'	'
Trading securities	0	'	'	'
Available for sale securities	0	'	'	'
Company-owned life insurance	0	'	'	'
Derivatives	0	'	'	'
Total	0	'	'	'
Deferred compensation	0	'	'	'
Contingent consideration liability	54,259	46,201	'	'
Derivatives	0	'	'	'
Total	54,259	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	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	0	'	'	'
Available for sale securities	0	'	'	'
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	$0	'	'	'

Reconciliation_of_Beginning_an

Reconciliation of Beginning and Ending Balances of Contingent Consideration Liability (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'	'
Beginning Balance	$46,201	$51,163
Contingency reserve	14,272	'
Payment of contingent considerations on acquisitions	-13,725	-16,172
Income from fair value adjustments	'	-138
Expense from fair value adjustments	7,511	4,462
Ending Balance	$54,259	$39,315

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended
	Jun. 30, 2014	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'	'
Contingency reserve expense	'	$20,272,000
Payments against liability	6,000,000	'
Remaining contingency reserve	'	$14,272,000

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])	9 Months Ended
	Sep. 30, 2014
Minimum [Member]	'
Business Acquisition, Contingent Consideration [Line Items]	'
Revenue growth percentage	1.00%
Maximum [Member]	'
Business Acquisition, Contingent Consideration [Line Items]	'
Revenue growth percentage	98.00%

Assets_Measured_at_Fair_Value_1

Assets Measured at Fair Value on Non-Recurring Basis (Detail) (Fair Value, Measurements, Non-Recurring [Member], USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	$13,759	$15,825
Impaired loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	13,621	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	138	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	0	'
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	0	'
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	0	'
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	0	'
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	0	'
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	0	'
Significant Unobservable Inputs (Level 3) [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	13,759	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	13,621	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	138	329
Total Gains (Losses) Recognized [Member]	'	'
Fair Value Of Assets And Liabilities Measured At Non Recurring Basis [Line Items]	'	'
Assets measured at fair value	632	-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	632	-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	$0	($125)

Estimated_Fair_Value_of_Financ

Estimated Fair Value of Financial Instruments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	$237,961,000	$209,770,000
Federal Reserve Bank and other	71,192,000	50,482,000
Loans (exclusive of allowance for loan loss)	7,104,900,000	6,521,900,000
Time deposits	961,100,000	1,449,600,000
Long-term debt	7,067,000	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	270,300,000	231,500,000
Federal Reserve Bank and other	71,200,000	50,500,000
Loans (exclusive of allowance for loan loss)	7,136,300,000	6,571,600,000
Time deposits	960,700,000	1,449,400,000
Long-term debt	7,300,000	4,500,000
Commitments to extend credit for loans	4,300,000	6,000,000
Commercial letters of credit	100,000	100,000
Standby letters of credit	1,800,000	2,000,000
Significant Other Observable Inputs (Level 2) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities held to maturity	270,300,000	231,500,000
Federal Reserve Bank and other	71,200,000	50,500,000
Loans (exclusive of allowance for loan loss)	7,136,300,000	6,571,600,000
Time deposits	960,700,000	1,449,400,000
Long-term debt	$7,300,000	$4,500,000