PrivateBancorp (PVTB) 10-Q 5 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 31, 2015
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Entity Registrant Name	PRIVATEBANCORP, INC
Entity Central Index Key	889,936
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		79,051,298
Nonvoting Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		0

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks		$ 145,477	$ 132,211
Federal funds sold and interest-bearing deposits in banks		231,600	292,341
Loans held-for-sale		76,225	115,161
Securities available-for-sale, at fair value (pledged as collateral to creditors: $157.2 million - 2015; $86.5 million - 2014)		1,703,926	1,645,344
Securities held-to-maturity, at amortized cost (fair value: $1.3 billion - 2015; $1.1 billion - 2014)		1,293,433	1,129,285
Federal Home Loan Bank (FHLB) stock		30,740	28,666
Loans – excluding covered assets, net of unearned fees		13,079,314	11,892,219
Allowance for loan losses		(162,868)	(152,498)
Loans, net of allowance for loan losses and unearned fees		12,916,446	11,739,721
Covered assets		28,559	34,132
Allowance for covered loan losses		(6,337)	(5,191)
Covered assets, net of allowance for covered loan losses		22,222	28,941
Other real estate owned, excluding covered assets		12,760	17,416
Premises, furniture, and equipment, net		38,265	39,143
Accrued interest receivable		43,064	40,531
Investment in bank owned life insurance		56,292	55,207
Goodwill		94,041	94,041
Other intangible assets		4,008	5,885
Derivative assets	[1]	59,978	43,062
Other assets		166,128	196,427
Total assets		16,894,605	15,603,382
Demand deposits:
Noninterest-bearing		4,068,816	3,516,695
Interest-bearing		1,264,201	1,907,320
Savings deposits and money market accounts		6,249,485	5,171,025
Time deposits		2,315,237	2,494,928
Total deposits		13,897,739	13,089,968
Deposits held-for-sale		0	122,216
Short-term borrowings		514,121	432,385
Long-term debt		694,788	344,788
Accrued interest payable		6,509	6,948
Derivative liabilities	[1]	21,967	26,767
Other liabilities		111,482	98,631
Total liabilities		15,246,606	14,121,703
Equity
Common stock (no par value, $1 stated value; authorized shares: 174 million; issued shares: 78,865,355 - 2015 and 78,179,542 - 2014)		78,197	77,211
Treasury stock, at cost (1,601 - 2015 and 1,704 - 2014)		(63)	(53)
Additional paid-in capital		1,060,274	1,034,048
Retained earnings		480,342	349,556
Accumulated other comprehensive income, net of tax		29,249	20,917
Total equity		1,647,999	1,481,679
Total liabilities and equity		$ 16,894,605	$ 15,603,382
[1]	All derivative contracts are over-the-counter contracts.

Consolidated Statements Of Fin3

Consolidated Statements Of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Securities available-for-sale, pledged as collateral to creditors	$ 157,210	$ 86,527
Securities held-to-maturity, at fair value	$ 1,304,477	$ 1,132,615
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Stated Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	174,000,000	174,000,000
Common Stock, Shares Issued	78,865,355	78,179,542
Treasury Stock, Shares Issued	1,601	1,704

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Income
Loans, including fees	$ 132,106	$ 119,211	$ 380,455	$ 343,106
Federal funds sold and interest-bearing deposits in banks	168	142	674	423
Securities:
Taxable	13,599	13,370	40,696	40,250
Exempt from Federal income taxes	2,177	1,529	5,964	4,490
Other interest income	69	48	180	140
Total interest income	148,119	134,300	427,969	388,409
Interest Expense
Interest-bearing demand deposits	937	918	2,909	2,702
Savings deposits and money market accounts	5,119	4,173	14,682	12,234
Time deposits	5,782	5,723	17,151	15,563
Short-term borrowings	24	158	455	495
Long-term debt	5,048	6,570	14,948	19,554
Total interest expense	16,910	17,542	50,145	50,548
Net interest income	131,209	116,758	377,824	337,861
Provision for loan and covered loan losses	4,197	3,890	11,959	7,924
Net interest income after provision for loan and covered loan losses	127,012	112,868	365,865	329,937
Non-interest Income
Asset management	4,462	4,240	13,566	13,027
Mortgage banking	3,340	2,904	11,267	7,162
Capital markets products	3,098	3,253	12,189	12,342
Treasury management	8,010	6,935	22,758	20,210
Loan, letter of credit and commitment fees	5,670	4,970	15,690	14,410
Syndication fees	4,364	6,818	12,361	15,571
Deposit service charges and fees and other income	1,585	1,546	8,740	3,912
Net securities gains (losses)	260	3	793	530
Total non-interest income	30,789	30,669	97,364	87,164
Non-interest Expense
Salaries and employee benefits	50,019	46,421	152,400	135,446
Net occupancy and equipment expense	8,180	7,807	24,203	23,311
Technology and related costs	3,583	3,362	10,424	9,850
Marketing	3,682	3,752	11,926	9,754
Professional services	3,679	2,626	8,574	8,290
Outsourced servicing costs	1,786	1,736	5,500	5,050
Net foreclosed property expenses	1,080	1,631	2,993	7,225
Postage, telephone, and delivery	857	839	2,618	2,591
Insurance	3,667	3,077	10,328	8,996
Loan and collection expense	2,324	2,099	6,802	4,728
Other expenses	6,318	4,486	14,449	13,810
Total non-interest expense	85,175	77,836	250,217	229,051
Income (loss) before income taxes	72,626	65,701	213,012	188,050
Income tax provision	27,358	25,174	79,838	72,194
Net income (loss) available to common stockholders	$ 45,268	$ 40,527	$ 133,174	$ 115,856
Per Common Share Data
Basic earnings per share (in dollars)	$ 0.58	$ 0.52	$ 1.70	$ 1.48
Diluted earnings per share (in dollars)	0.57	0.51	1.67	1.47
Cash dividends declared (per share)	$ 0.01	$ 0.01	$ 0.03	$ 0.03
Weighted-average common shares outstanding	78,144	77,110	77,834	76,951
Weighted-average diluted common shares outstanding	79,401	77,934	79,027	77,721

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income (loss)	$ 45,268	$ 40,527	$ 133,174	$ 115,856
Available-for-sale securities:
Net unrealized gains (losses)	9,264	(7,103)	3,857	8,133
Reclassification of net losses (gains) included in net income	(385)	(3)	(918)	(530)
Income tax benefit (expense)	(3,461)	2,757	(1,180)	(3,007)
Net unrealized (losses) gains on available-for-sale securities	5,418	(4,349)	1,759	4,596
Cash flow hedges:
Net unrealized gains (losses)	10,261	(2,168)	18,387	9,710
Reclassification of net gains included in net income	(2,571)	(2,456)	(7,643)	(6,763)
Income tax benefit (expense)	(2,987)	1,803	(4,171)	(1,151)
Net unrealized (losses) gains on cash flow hedges	4,703	(2,821)	6,573	1,796
Other Comprehensive Income (Loss)	10,121	(7,170)	8,332	6,392
Comprehensive income	$ 55,389	$ 33,357	$ 141,506	$ 122,248

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Total	Common Shares Outstanding [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]		Accumulated Other Comprehensive Income [Member]
Common Shares Outstanding, Beginning Balance (in shares) at Dec. 31, 2013			77,707
Stockholders' Equity, Beginning Balance at Dec. 31, 2013		$ 1,301,904		$ 76,825	$ (6,415)	$ 1,022,023	$ 199,627		$ 9,844
Comprehensive income (loss)
Net income (loss)		115,856					115,856	[1]
Other comprehensive income (loss)		6,392							6,392	[1]
Total comprehensive income (loss)	[1]	122,248
Cash dividends declared:
Cash dividends declared ($0.03 per common share)		(2,360)				0	(2,360)
Common stock issued for: [Abstract]
Nonvested (restricted) stock grants, shares			376
Nonvested (restricted) stock grants		0		(244)	5,607	(5,363)
Exercise of stock options, shares			215
Exercise of stock options		4,002		31	5,341	(1,370)
Restricted stock activity, shares			(10)
Restricted stock activity		0		531	360	(891)
Deferred compensation plan, shares			13
Deferred compensation plan		416		0	384	32
Excess tax benefit from share-based compensation plans		2,933				2,933
Stock repurchased in connection with benefit plans, shares			(180)
Stock repurchased in connection with benefit plans		(5,283)			(5,283)
Share-based compensation expense		11,449				11,449
Common Shares Outstanding, Ending Balance (in shares) at Sep. 30, 2014			78,121
Stockholders' Equity, Ending Balance at Sep. 30, 2014		1,435,309		77,143	(6)	1,028,813	313,123		16,236
Common Shares Outstanding, Beginning Balance (in shares) at Dec. 31, 2014			78,178
Stockholders' Equity, Beginning Balance at Dec. 31, 2014		1,481,679		77,211	(53)	1,034,048	349,556		20,917
Comprehensive income (loss)
Net income (loss)		133,174					133,174	[1]
Other comprehensive income (loss)		8,332							8,332	[1]
Total comprehensive income (loss)	[1]	141,506
Cash dividends declared:
Cash dividends declared ($0.03 per common share)		(2,388)					(2,388)
Common stock issued for: [Abstract]
Nonvested (restricted) stock grants, shares			251
Nonvested (restricted) stock grants		0		0	0	0
Exercise of stock options, shares			598
Exercise of stock options		14,540		428	5,903	8,209
Restricted stock activity, shares			6
Restricted stock activity		0		558	0	(558)
Deferred compensation plan, shares			1
Deferred compensation plan		305			29	276
Excess tax benefit from share-based compensation plans		4,331				4,331
Stock repurchased in connection with benefit plans, shares			(171)
Stock repurchased in connection with benefit plans		(5,942)			(5,942)
Share-based compensation expense		13,968				13,968
Common Shares Outstanding, Ending Balance (in shares) at Sep. 30, 2015			78,863
Stockholders' Equity, Ending Balance at Sep. 30, 2015		$ 1,647,999		$ 78,197	$ (63)	$ 1,060,274	$ 480,342		$ 29,249
[1]	Net of taxes and reclassification adjustments.

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Operating Activities
Net income (loss)		$ 45,268	$ 40,527	$ 133,174	$ 115,856
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan and covered loan losses		4,197	3,890	11,959	7,924
Provision for unfunded commitments	[1]	2,048	481	2,931	638
Depreciation of premises, furniture, and equipment				6,361	6,514
Net amortization of premium on securities				13,201	10,827
Net (gains) losses on sale of securities		(260)	(3)	(793)	(530)
Valuation adjustment on other real estate owned				2,254	5,260
Net (gains) losses on sale of other real estate owned				399	358
Net amortization of discount on covered assets				282	293
Bank owned life insurance income				(1,085)	(984)
Net (decrease) increase in deferred loan fees				(3,687)	1,569
Share-based compensation expense				13,968	11,449
Excess tax benefit from exercise of stock options and vesting of restricted shares				(4,876)	(3,341)
Provision (benefit) for deferred income tax expense		(5,539)	(6,232)	(3,290)	(5,165)
Amortization of other intangibles				1,877	2,265
Originations and purchases of loans held-for-sale				(481,809)	(351,440)
Proceeds from sales of loans held-for-sale				530,442	326,363
Net (gains) losses from sales of loans held-for-sale				(9,605)	(5,666)
Net (increase) decrease in derivative assets and liabilities				(21,716)	(7,388)
Net (increase) decrease in accrued interest receivable				(2,533)	(2,697)
Net increase (decrease) in accrued interest payable				(439)	661
Net (increase) decrease in other assets				43,221	16,575
Net increase (decrease) in other liabilities				13,982	(326)
Net cash provided by (used in) operating activities				240,126	129,015
Available-for-sale securities:
Proceeds from maturities, prepayments, and calls				159,121	176,823
Proceeds from sales		26,967	1,041	57,313	74,690
Purchases				(279,675)	(190,032)
Held-to-maturity securities:
Proceeds from maturities, prepayments, and calls				119,597	86,313
Purchases				(288,555)	(240,332)
Gain on sale of branch				(4,092)	0
Net redemption (purchase) of FHLB stock				(2,074)	1,339
Net decrease (increase) in loans				(1,189,890)	(909,877)
Net decrease in covered assets				6,228	36,213
Proceeds from sale of other real estate owned				7,105	8,213
Net purchases of premises, furniture, and equipment				(5,483)	(6,482)
Net cash (used in) provided by investing activities				(1,416,313)	(963,132)
Financing Activities
Net (decrease) increase in deposit accounts, including deposits held-for-sale				685,555	964,071
Net increase (decrease) in short-term borrowings, excluding FHLB advances				57,736	(2,837)
Net increase (decrease) in FHLB advances				374,000	30,000
Stock repurchased in connection with benefit plans				(5,942)	(5,283)
Cash dividends paid				(2,358)	(2,336)
Proceeds from exercise of stock options and issuance of common stock under benefit plans				14,845	4,418
Excess tax benefit from exercise of stock options and vesting of restricted shares				4,876	3,341
Net cash (used in) provided by financing activities				1,128,712	991,374
Net increase (decrease) in cash and cash equivalents				(47,475)	157,257
Cash and cash equivalents at beginning of year				424,552	440,062	$ 440,062
Cash and cash equivalents at end of period		$ 377,077	$ 597,319	377,077	597,319	$ 424,552
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest				50,584	49,887
Cash paid for income taxes				76,997	70,400
Non-cash transfers of loans to other real estate				5,102	2,576
Non-cash transfers of loans to loans held-for-sale				125,161	109,885
Non-cash transfers of deposits to deposits held-for-sale				$ 0	$ 128,508
[1]	Unfunded commitments include commitments to extend credit, standby letters of credit and commercial letters of credit. Unfunded commitments related to covered assets are excluded as they are covered under a loss sharing agreement with the FDIC.

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS Recently Adopted Accounting Pronouncements Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure - On January 1, 2015, we adopted new accounting guidance issued by the Financial Accounting Standards Board ("FASB") that requires a creditor to derecognize a mortgage loan upon foreclosure and recognize a separate other receivable if the following conditions are met: (1) the loan has a government guarantee that is not separable from the loan before foreclosure, (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, and (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable is measured based on the amount of the loan balance expected to be recovered from the guarantor. The adoption of this guidance did not impact our financial position or consolidated results of operations. Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans - On January 1, 2015, we adopted new accounting guidance issued by the FASB that clarifies when an entity is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan receivable should be derecognized and the real estate property recognized. The guidance indicates that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or similar legal agreement. Additionally, the guidance requires disclosure of (1) the amount of foreclosed residential real estate property held by the Company and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The adoption of this guidance did not impact our financial position or consolidated results of operations. Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures - On January 1, 2015, we adopted new accounting guidance issued by the FASB that amends the accounting for repurchase-to-maturity transactions and repurchase financings, except for the disclosures related to transactions accounted for as secured borrowings, which became effective for the Company’s financial statements that include periods beginning on April 1, 2015. Under the new guidance, repurchase-to-maturity transactions are accounted for as secured borrowings. Additionally, the initial transfer and related repurchase agreement in a repurchase financing must be considered separately, rather than as a linked transaction. In addition, new disclosures are required for (1) repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions that are accounted for as secured borrowings, and (2) transfers accounted for as sales when the transferor also retains substantially all of the exposure to the economic return on the transferred financial assets throughout the term of the transaction. The adoption of this guidance did not impact our financial position or consolidated results of operations. Accounting for Fees Paid in a Cloud Computing Arrangement - In April 2015, the Company adopted new accounting guidance that clarifies how a customer in a cloud computing arrangement (such as the Company) should determine whether the arrangement includes a software license. Under the new guidance, if a cloud computing arrangement is deemed to include a software license for internal use software, the software license would be accounted for in the same manner as other licenses of intangible assets. If a cloud computing arrangement is not deemed to include a software license, the arrangement would be accounted for as a service contract. Previously, the Company was required to analogize to lease accounting guidance when determining the asset acquired in a software licensing arrangement. As permitted under the guidance, the Company has elected to apply the guidance prospectively to all new or materially modified arrangements entered into on or after the effective date. The adoption of this guidance did not impact our financial position or consolidated results of operations. Accounting Pronouncements Pending Adoption Revenue from Contracts with Customers - In May 2014, the FASB issued a comprehensive new revenue recognition standard that will replace most of the existing revenue recognition guidance in U.S. GAAP. All arrangements involving the transfer of goods or services to customers are within the scope of the guidance, except for certain contracts subject to other U.S. GAAP guidance, including lease contracts and rights and obligations related to financial instruments. The standard’s core principle is that an entity should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also includes new disclosure requirements related to the nature, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The guidance is effective for the Company's financial statements beginning January 1, 2018. The Company may choose to apply the new standard either retrospectively or through a cumulative effect adjustment as of January 1, 2018. The Company is in the process of determining the effect of the new guidance on our financial position and consolidated results of operations, as well as which transition method to use. Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period - In June 2014, the FASB issued guidance that clarifies the accounting for a performance target that affects vesting of a share-based payment award and that could be achieved after the requisite service period. The guidance indicates that such a performance target would not be reflected in the estimation of the award’s grant date fair value. Rather, compensation cost for such an award would be recognized over the requisite service period, if it is probable that the performance target will be achieved. The total amount of compensation cost recognized during and after the requisite service period would reflect the number of awards that are expected to vest and would be adjusted to reflect those awards that ultimately vest. The guidance will be effective for the Company’s financial statements that include periods beginning January 1, 2016 and applied prospectively to awards that are granted or modified after the effective date. The adoption of this guidance is not expected to have a material impact on our financial position or consolidated results of operations. Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern - In August 2014, the FASB issued guidance that requires management to evaluate whether there are conditions and events that raise substantial doubt about an entity’s ability to continue as a going concern. The guidance requires new disclosures to the extent management concludes there is substantial doubt about an entity’s ability to continue as a going concern. The guidance will be effective for the Company’s annual financial statements dated December 31, 2016, as well as interim periods thereafter. The adoption of this guidance is not expected to have a material impact on our financial position or consolidated results of operations. Amendments to the Consolidation Analysis - In February 2015, the FASB issued guidance that changes certain aspects of the variable interest and voting interest consolidation models. The amendments modify existing guidance on (1) the evaluation of whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities, (2) when fee arrangements represent variable interests in a VIE, and (3) the primary beneficiary determination for VIEs. Additionally, the guidance eliminates the presumption that a general partner controls a limited partnership under the voting interest model and exempts reporting entities from consolidating money market funds that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a-7 of the Investment Company Act of 1940. The guidance will be effective for the Company’s financial statements that include periods beginning on January 1, 2016. The Company may choose to apply the guidance either retrospectively or through a cumulative effect adjustment as of January 1, 2016. The Company is in the process of determining the effect of the new guidance on our financial position and consolidated results of operations, as well as which transition method to use. Debt Issuance Costs - In April 2015, the FASB issued guidance to clarify the presentation of debt issuance costs within the balance sheet. This guidance requires that an entity present debt issuance costs related to a recognized debt liability on the balance sheet as a direct deduction from the carrying amount of that debt liability, not as a separate asset. The standard does not affect the current guidance for the recognition and measurement for debt issuance costs. This guidance will be effective for the Company's financial statements that include periods beginning January 1, 2016, and must be applied retrospectively. The adoption of this guidance is not expected to have a material impact on our financial position or consolidated results of operations.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited consolidated interim financial statements of PrivateBancorp, Inc. ("PrivateBancorp" or the "Company"), a Delaware corporation, have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission for quarterly reports on Form 10-Q and do not include certain information and footnote disclosures required by U.S. generally accepted accounting principles ("U.S. GAAP") for complete annual financial statements. Accordingly, these financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2014 . The accompanying unaudited consolidated interim financial statements have been prepared in accordance with U.S. GAAP, and (where applicable) in accordance with accounting and reporting guidelines prescribed by bank regulation and authority, and reflect all adjustments that are, in the opinion of management, necessary for the fair presentation of the financial position and results of operations for the periods presented. All such adjustments are of a normal recurring nature. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the full year or any other period. The accompanying consolidated financial statements include the accounts and results of operations of the Company and its subsidiary, The PrivateBank and Trust Company (the "Bank"), after elimination of all significant intercompany accounts and transactions. Certain reclassifications have been made to prior period amounts to conform to the current period presentation. The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates. In preparing the consolidated financial statements, we have considered the impact of events occurring subsequent to September 30, 2015 , for potential recognition or disclosure.

SECURITIES

SECURITIES	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
SECURITIES	SECURITIES Securities Portfolio (Amounts in thousands) September 30, 2015 December 31, 2014 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. Treasury $ 268,078 $ 1,702 $ (46 ) $ 269,734 $ 269,697 $ 120 $ (1,552 ) $ 268,265 U.S. Agency 46,619 116 — 46,735 46,959 — (701 ) 46,258 Collateralized mortgage obligations 104,380 4,037 (32 ) 108,385 132,633 4,334 (34 ) 136,933 Residential mortgage-backed securities 804,524 22,240 (1,169 ) 825,595 822,746 25,058 (1,726 ) 846,078 State and municipal securities 445,387 8,656 (566 ) 453,477 340,810 7,222 (722 ) 347,310 Foreign sovereign debt — — — — 500 — — 500 Total $ 1,668,988 $ 36,751 $ (1,813 ) $ 1,703,926 $ 1,613,345 $ 36,734 $ (4,735 ) $ 1,645,344 Securities Held-to-Maturity Collateralized mortgage obligations $ 53,336 $ — $ (1,179 ) $ 52,157 $ 59,960 $ — $ (2,017 ) $ 57,943 Residential mortgage-backed securities 1,017,011 12,187 (1,290 ) 1,027,908 885,235 9,410 (2,483 ) 892,162 Commercial mortgage-backed securities 218,164 2,292 (416 ) 220,040 183,021 592 (2,176 ) 181,437 State and municipal securities 369 4 — 373 1,069 4 — 1,073 Other securities 4,553 — (554 ) 3,999 — — — — Total $ 1,293,433 $ 14,483 $ (3,439 ) $ 1,304,477 $ 1,129,285 $ 10,006 $ (6,676 ) $ 1,132,615 The carrying value of securities pledged to secure public deposits, FHLB advances, trust deposits, Federal Reserve Bank ("FRB") discount window borrowing availability, securities sold under agreements to repurchase ("repurchase agreements"), derivative transactions, standby letters of credit with counterparty banks and for other purposes as permitted or required by law totaled $481.9 million and $353.1 million at September 30, 2015 and December 31, 2014 , respectively. Of total pledged securities, securities pledged to creditors under agreements pursuant to which the collateral may be sold or re-pledged by the secured parties totaled $157.2 million and $86.5 million at September 30, 2015 and December 31, 2014 , respectively. Excluding securities issued or backed by the U.S. Government, its agencies and U.S. Government-sponsored enterprises, there were no investments in securities from one issuer that exceeded 10% of consolidated equity at September 30, 2015 or December 31, 2014 . The following table presents the fair values of securities with unrealized losses as of September 30, 2015 , and December 31, 2014 . The securities presented are grouped according to the time periods during which the securities have been in a continuous unrealized loss position. Securities in Unrealized Loss Position (Amounts in thousands) Less Than 12 Months 12 Months or Longer Total Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses As of September 30, 2015 Securities Available-for-Sale U.S. Treasury — $ — $ — 1 $ 26,065 $ (46 ) $ 26,065 $ (46 ) Collateralized mortgage obligations 3 4,993 (32 ) — — — 4,993 (32 ) Residential mortgage-backed securities 7 40,475 (141 ) 5 79,959 (1,028 ) 120,434 (1,169 ) State and municipal securities 147 70,560 (529 ) 13 4,154 (37 ) 74,714 (566 ) Total $ 116,028 $ (702 ) $ 110,178 $ (1,111 ) $ 226,206 $ (1,813 ) Securities Held-to-Maturity Collateralized mortgage obligations — $ — $ — 4 $ 52,157 $ (1,179 ) $ 52,157 $ (1,179 ) Residential mortgage-backed securities 14 140,406 (542 ) 10 59,947 (748 ) 200,353 (1,290 ) Commercial mortgage-backed securities 8 31,292 (238 ) 12 38,819 (178 ) 70,111 (416 ) Other securities 1 3,999 (554 ) — — — 3,999 (554 ) Total $ 175,697 $ (1,334 ) $ 150,923 $ (2,105 ) $ 326,620 $ (3,439 ) As of December 31, 2014 Securities Available-for-Sale U.S. Treasury 5 $ 119,233 $ (159 ) 5 $ 123,117 $ (1,393 ) $ 242,350 $ (1,552 ) U.S. Agency — — — 3 46,258 (701 ) 46,258 (701 ) Collateralized mortgage obligations 2 4,565 (34 ) — — — 4,565 (34 ) Residential mortgage-backed securities — — — 4 89,085 (1,726 ) 89,085 (1,726 ) State and municipal securities 116 53,092 (249 ) 58 32,152 (473 ) 85,244 (722 ) Total $ 176,890 $ (442 ) $ 290,612 $ (4,293 ) $ 467,502 $ (4,735 ) Securities Held-to-Maturity Collateralized mortgage obligations — $ — $ — 4 $ 57,943 $ (2,017 ) $ 57,943 $ (2,017 ) Residential mortgage-backed securities 6 45,867 (38 ) 18 162,564 (2,445 ) 208,431 (2,483 ) Commercial mortgage-backed securities 4 10,021 (28 ) 27 105,709 (2,148 ) 115,730 (2,176 ) Total $ 55,888 $ (66 ) $ 326,216 $ (6,610 ) $ 382,104 $ (6,676 ) There were $261.1 million of securities with $3.2 million in an unrealized loss position for greater than 12 months at September 30, 2015 . At December 31, 2014 , there were $616.8 million of securities with $10.9 million in an unrealized loss position for greater than 12 months. The Company does not consider these unrealized losses to be credit-related. These unrealized losses relate to changes in interest rates and market spreads. We do not intend to sell the securities nor do we believe it is more likely than not that we will be required to sell the investments before recovery of their amortized cost bases, which may be at maturity. We conduct a periodic assessment of our investment portfolio to determine whether any securities are other-than-temporarily impaired ("OTTI"). When assessing unrealized losses for OTTI, we consider the nature of the investment, the financial condition of the issuer, the extent and duration of unrealized loss, expected cash flows of underlying assets and market conditions. For those debt securities that we intend to sell, or more-likely-than-not will be required to sell, prior to the expected recovery of the amortized cost, the entire impairment (i.e., the difference between amortized cost and the fair value) is recognized in earnings. During the three months ended September 30, 2015, we identified three municipal debt securities from the same issuer totaling $1.1 million , which had credit rating downgrades during the period. We determined that the difference between amortized cost and fair value is other-than-temporary and accordingly, recognized the difference of $125,000 in current operating results. Management intends to sell these available-for-sale securities. The loss was reported within net securities gains in the Consolidated Statements of Income. The following table presents the remaining contractual maturity of securities as of September 30, 2015 , by amortized cost and fair value. Remaining Contractual Maturity of Securities (Amounts in thousands) September 30, 2015 Available-For-Sale Securities Held-To-Maturity Securities Amortized Cost Fair Value Amortized Cost Fair Value U.S. Treasury, U.S. Agency, state and municipal and other securities: One year or less $ 9,871 $ 9,973 $ 116 $ 116 One year to five years 458,502 463,853 253 257 Five years to ten years 267,129 271,218 4,553 3,999 After ten years 24,582 24,902 — — All other securities: Collateralized mortgage obligations 104,380 108,385 53,336 52,157 Residential mortgage-backed securities 804,524 825,595 1,017,011 1,027,908 Commercial mortgage-backed securities — — 218,164 220,040 Total $ 1,668,988 $ 1,703,926 $ 1,293,433 $ 1,304,477 The following table presents gains (losses) on securities for the three months and nine months ended September 30, 2015 and 2014 . Securities Gains (Losses) (Amounts in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Proceeds from sales $ 26,967 $ 1,041 $ 57,313 $ 74,690 Gross realized gains $ 385 $ 5 $ 942 $ 615 Gross realized losses (1) (125 ) (2 ) (149 ) (85 ) Net realized gains $ 260 $ 3 $ 793 $ 530 Income tax provision on net realized gains $ 98 $ 1 $ 308 $ 209 (1) Includes OTTI of $125,000 for the three and nine months ended September 30, 2015, and is reported in the Consolidated Statement of Income within net security gains. Refer to Note 10 for additional details of the securities available-for-sale portfolio and the related impact of unrealized gains (losses) on other comprehensive income. All non-marketable Community Reinvestment Act ("CRA") qualified investments, totaling $37.8 million and $21.6 million at September 30, 2015 and December 31, 2014, respectively, are recorded in other assets on the Statements of Financial Condition.

LOANS AND CREDIT QUALITY

LOANS AND CREDIT QUALITY	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
LOANS	LOANS AND CREDIT QUALITY The following loan portfolio and credit quality disclosures exclude covered loans. Covered loans represent loans acquired through a Federal Deposit Insurance Corporation ("FDIC") assisted transaction that are subject to a loss share agreement and are presented separately in the Consolidated Statements of Financial Condition. Refer to the "Covered Assets" section in this footnote for further information regarding covered loans. Loan Portfolio (Amounts in thousands) September 30, December 31, Commercial and industrial $ 6,654,268 $ 5,996,070 Commercial - owner-occupied CRE 2,017,733 1,892,564 Total commercial 8,672,001 7,888,634 Commercial real estate 2,545,143 2,323,616 Commercial real estate - multi-family 704,195 593,103 Total commercial real estate 3,249,338 2,916,719 Construction 412,688 381,102 Residential real estate 439,005 361,565 Home equity 133,122 142,177 Personal 173,160 202,022 Total loans $ 13,079,314 $ 11,892,219 Net deferred loan fees and unamortized discount and premium on loans, included as a reduction in total loans $ 43,330 $ 47,017 Overdrawn demand deposits included in total loans $ 2,936 $ 1,963 We primarily lend to businesses and consumers in the market areas in which we have physical locations. We seek to diversify our loan portfolio by loan type, industry type for commercial and industrial loans, product type for commercial real estate and construction loans, and borrower. Loans Held-For-Sale (Amounts in thousands) September 30, December 31, Mortgage loans held-for-sale (1) $ 24,065 $ 42,215 Other loans held-for-sale (2) 52,160 72,946 Total loans held-for-sale $ 76,225 $ 115,161 (1) Comprised of residential mortgage loan originations intended to be sold in the secondary market. The Company accounts for these loans under the fair value option. Refer to Note 16 for additional information regarding mortgage loans held-for-sale. (2) Amounts at September 30, 2015 , represent commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value. Generally, the Company intends to sell these loans within 30-60 days from the date the intent to sell was established. Amounts at December 31, 2014 , consist of $36.6 million of commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value and $36.3 million of commercial, commercial real estate, construction, home equity and personal loans held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015. Carrying Value of Loans Pledged (Amounts in thousands) September 30, December 31, Loans pledged to secure outstanding borrowings or availability: FRB discount window borrowings (1) $ 416,573 $ 478,692 FHLB advances (2) 4,550,246 1,576,168 Total $ 4,966,819 $ 2,054,860 (1) No borrowings were outstanding at September 30, 2015 and December 31, 2014 . (2) Refer to Notes 7 and 8 for additional information regarding FHLB advances. Loan Portfolio Aging (Amounts in thousands) Delinquent Current 30 – 59 Days Past Due 60 – 89 Days Past Due 90 Days Past Due and Accruing Total Accruing Loans Nonaccrual Total Loans As of September 30, 2015 Commercial $ 8,649,998 $ 632 $ 3,001 $ — $ 8,653,631 $ 18,370 $ 8,672,001 Commercial real estate 3,236,785 351 161 — 3,237,297 12,041 3,249,338 Construction 412,688 — — — 412,688 — 412,688 Residential real estate 434,173 — 560 — 434,733 4,272 439,005 Home equity 123,278 321 250 — 123,849 9,273 133,122 Personal 171,990 932 212 — 173,134 26 173,160 Total loans $ 13,028,912 $ 2,236 $ 4,184 $ — $ 13,035,332 $ 43,982 $ 13,079,314 As of December 31, 2014 Commercial $ 7,855,833 $ 762 $ 992 $ — $ 7,857,587 $ 31,047 $ 7,888,634 Commercial real estate 2,891,301 5,408 261 — 2,896,970 19,749 2,916,719 Construction 380,939 163 — — 381,102 — 381,102 Residential real estate 354,717 943 631 — 356,291 5,274 361,565 Home equity 128,500 397 2,236 — 131,133 11,044 142,177 Personal 201,569 23 — — 201,592 430 202,022 Total loans $ 11,812,859 $ 7,696 $ 4,120 $ — $ 11,824,675 $ 67,544 $ 11,892,219 Impaired Loans Impaired loans consist of nonaccrual loans (which include nonaccrual troubled debt restructurings ("TDRs")) and loans classified as accruing TDRs. A loan is considered impaired when, based on current information and events, either (i) management believes that it is probable that we will be unable to collect all amounts due (both principal and interest) according to the original contractual terms of the loan agreement, or (ii) it has been classified as a TDR. The following two tables present our recorded investment in impaired loans outstanding by product segment, including our recorded investment in impaired loans, which represents the principal amount outstanding, net of unearned income, deferred loan fees and costs, and any direct principal charge-offs. Impaired Loans (Amounts in thousands) Unpaid Contractual Principal Balance Recorded Investment With No Specific Reserve Recorded Investment With Specific Reserve Total Recorded Investment Specific Reserve As of September 30, 2015 Commercial $ 50,150 $ 30,841 $ 11,125 $ 41,966 $ 5,468 Commercial real estate 18,524 3,289 8,752 12,041 1,465 Residential real estate 4,459 — 4,272 4,272 558 Home equity 11,979 4,263 7,111 11,374 1,575 Personal 26 — 26 26 6 Total impaired loans $ 85,138 $ 38,393 $ 31,286 $ 69,679 $ 9,072 As of December 31, 2014 Commercial $ 60,174 $ 25,739 $ 26,432 $ 52,171 $ 11,487 Commercial real estate 26,738 9,755 10,193 19,948 2,441 Residential real estate 5,849 349 4,925 5,274 735 Home equity 12,904 3,627 8,839 12,466 1,855 Personal 430 — 430 430 109 Total impaired loans $ 106,095 $ 39,470 $ 50,819 $ 90,289 $ 16,627 Average Recorded Investment and Interest Income Recognized on Impaired Loans (1) (Amounts in thousands) Three Months Ended September 30, 2015 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial $ 53,886 $ 287 $ 54,559 $ 428 Commercial real estate 12,656 — 23,841 16 Residential real estate 4,332 — 9,522 — Home equity 11,942 34 11,696 22 Personal 25 — 560 — Total $ 82,841 $ 321 $ 100,178 $ 466 (1) Represents amounts while classified as impaired for the periods presented. Average Recorded Investment and Interest Income Recognized on Impaired Loans (1) (Continued) (Amounts in thousands) Nine Months Ended September 30, 2015 2014 Average Interest Average Interest Commercial $ 54,331 $ 788 $ 49,593 $ 1,229 Commercial real estate 15,170 13 36,351 60 Residential real estate 4,594 — 9,665 — Home equity 12,653 79 12,628 67 Personal 217 — 609 — Total $ 86,965 $ 880 $ 108,846 $ 1,356 (1) Represents amounts while classified as impaired for the periods presented. Credit Quality Indicators We attempt to mitigate risk through loan structure, collateral, monitoring, and other credit risk management controls. We have adopted an internal risk rating policy in which each loan is rated for credit quality with a numerical rating of 1 through 8 . Loans rated 5 and better ( 1 - 5 ratings, inclusive) are considered "pass" rated credits that we believe exhibit acceptable financial performance, cash flow, and leverage. Credits rated 6 are performing in accordance with contractual terms but are considered "special mention" as these credits demonstrate potential weakness that, if left unresolved, may result in deterioration in our credit position and/or the repayment prospects for the credit. Borrowers rated special mention may exhibit adverse operating trends, high leverage, tight liquidity or other credit concerns. Loans rated 7 may be classified as either accruing ("potential problem") or nonaccrual ("nonperforming"). Potential problem loans, like special mention, are loans that are performing in accordance with contractual terms, but for which management has some level of concern (greater than that of special mention loans) about the ability of the borrowers to meet existing repayment terms in future periods. Potential problem loans continue to accrue interest but the ultimate collection of these loans in full is a risk due to the same conditions that characterize a 6 -rated credit. These credits may also have somewhat increased risk profiles as a result of the current net worth and/or paying capacity of the obligor or guarantors or a declining value of the collateral pledged. These loans generally have a well-defined weakness that may jeopardize collection of the debt and are characterized by the distinct possibility that we may sustain some loss if the deficiencies are not resolved. Although these loans are generally identified as potential problem loans and require additional attention by management, they may never become nonperforming. Nonperforming loans include nonaccrual loans risk rated 7 or 8 and have all the weaknesses inherent in a 7 -rated potential problem loan with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently-existing facts, conditions and values, highly questionable and improbable. Special mention, potential problem and nonperforming loans are reviewed at a minimum on a quarterly basis, while all other rated credits over a certain dollar threshold, depending on loan type, are reviewed annually or more frequently as the circumstances warrant. Credit Quality Indicators (Dollars in thousands) Special Mention % of Portfolio Loan Type Potential Problem Loans % of Portfolio Loan Type Non- Performing Loans % of Portfolio Loan Type Total Loans As of September 30, 2015 Commercial $ 139,622 1.6 $ 116,345 1.3 $ 18,370 0.2 $ 8,672,001 Commercial real estate 77 * 2,687 0.1 12,041 0.4 3,249,338 Construction — — — — — — 412,688 Residential real estate 6,029 1.4 6,071 1.4 4,272 1.0 439,005 Home equity 487 0.4 2,696 2.0 9,273 7.0 133,122 Personal 612 0.4 151 0.1 26 * 173,160 Total $ 146,827 1.1 $ 127,950 1.0 $ 43,982 0.3 $ 13,079,314 As of December 31, 2014 Commercial $ 93,130 1.2 $ 78,562 1.0 $ 31,047 0.4 $ 7,888,634 Commercial real estate 3,552 0.1 746 * 19,749 0.7 2,916,719 Construction — — — — — — 381,102 Residential real estate 2,964 0.8 5,981 1.7 5,274 1.5 361,565 Home equity 1,170 0.8 2,108 1.5 11,044 7.8 142,177 Personal 173 0.1 45 * 430 0.2 202,022 Total $ 100,989 0.8 $ 87,442 0.7 $ 67,544 0.6 $ 11,892,219 * Less than 0.1% Troubled Debt Restructured Loans Troubled Debt Restructured Loans Outstanding (Amounts in thousands) September 30, 2015 December 31, 2014 Accruing Nonaccrual (1) Accruing Nonaccrual (1) Commercial $ 23,596 $ 10,674 $ 21,124 $ 20,113 Commercial real estate — 9,397 199 8,005 Residential real estate — 1,308 — 1,881 Home equity 2,101 5,402 1,422 5,886 Personal — — — 413 Total $ 25,697 $ 26,781 $ 22,745 $ 36,298 (1) Included in nonperforming loans. At September 30, 2015 and December 31, 2014 , credit commitments to lend additional funds to debtors whose loan terms have been modified in a TDR (both accruing and nonaccruing) totaled $10.2 million and $8.5 million , respectively. Additions to Accruing Troubled Debt Restructurings During the Period (Dollars in thousands) Three Months Ended September 30, 2015 2014 Number of Borrowers Recorded Investment (1) Number of Borrowers Recorded Investment (1) Pre- Modification Post- Modification Pre- Modification Post- Modification Commercial Extension of maturity date (2) 2 $ 7,800 $ 7,800 1 $ 16,325 $ 16,325 Other concession (3) — — — 1 1,904 1,904 Total accruing 2 $ 7,800 $ 7,800 2 $ 18,229 $ 18,229 Nine Months Ended September 30, 2015 2014 Recorded Investment (1) Recorded Investment (1) Number of Borrowers Pre- Modification Post- Modification Number of Borrowers Pre- Modification Post- Modification Commercial Extension of maturity date (2) 7 $ 23,609 $ 23,328 3 $ 20,075 $ 20,075 Other concession (3) — — — 3 17,483 17,483 Total commercial 7 23,609 23,328 6 37,558 37,558 Commercial real estate Other concession (3) — — — 1 426 426 Home equity Extension of maturity date (2) 1 346 346 — — — Total accruing 8 $ 23,955 $ 23,674 7 $ 37,984 $ 37,984 Change in recorded investment due to principal paydown at time of modification $ 281 $ — (1) Represents amounts as of the date immediately prior to and immediately after the modification is effective. (2) Extension of maturity date also includes loans renewed at an existing rate of interest that is considered a below market rate for that particular loan’s risk profile. (3) Other concessions primarily include interest rate reductions, loan increases or deferrals of principal. Additions to Nonaccrual Troubled Debt Restructurings During the Period (Dollars in thousands) Three Months Ended September 30, 2015 2014 Number of Borrowers Recorded Investment (1) Number of Borrowers Recorded Investment (1) Pre- Modification Post- Modification Pre- Modification Post- Modification Commercial Extension of maturity date (2) 1 $ 19 $ 19 — $ — $ — Other concession (3) 1 4,473 4,473 4 17,046 17,046 Total commercial 2 4,492 4,492 4 17,046 17,046 Commercial real estate Other concession (3) — — — 1 653 686 Home equity Other concession (3) 2 276 276 1 544 607 Total nonaccrual 4 $ 4,768 $ 4,768 6 $ 18,243 $ 18,339 Nine Months Ended September 30, 2015 2014 Recorded Investment (1) Recorded Investment (1) Number of Pre- Post- Number of Pre- Post- Commercial Extension of maturity date (2) 5 $ 2,602 $ 2,602 — $ — $ — Other concession (3) 3 7,253 7,246 8 17,599 17,549 Total commercial 8 9,855 9,848 8 17,599 17,549 Commercial real estate Extension of maturity date (2) 2 1,747 1,660 — — — Other concession (3) 1 3,773 3,773 2 1,773 1,806 Total commercial real estate 3 5,520 5,433 2 1,773 1,806 Residential real estate Other concession (3) — — — 3 496 566 Home equity Extension of maturity date (2) 3 170 165 1 114 114 Other concession (3) 4 353 353 4 1,659 1,722 Total home equity 7 523 518 5 1,773 1,836 Total nonaccrual 18 $ 15,898 $ 15,799 18 $ 21,641 $ 21,757 Net decrease in recorded investment at time of modification $ 99 $ 50 (1) Represents amounts as of the date immediately prior to and immediately after the modification is effective. (2) Extension of maturity date also includes loans renewed at an existing rate of interest that is considered a below market rate for that particular loan’s risk profile. (3) Other concessions primarily include interest rate reductions, loan increases or deferrals of principal. At the time an accruing loan becomes modified and meets the definition of a TDR, it is considered impaired and no longer included as part of the general loan loss reserve population. However, our general loan loss reserve methodology does consider the amount and product type of the TDRs removed as a proxy for potentially heightened risk in the general portfolio when establishing final reserve requirements. As impaired loans, TDRs (both accruing and nonaccruing) are evaluated for impairment at the end of each quarter with a specific valuation reserve created, or adjusted (either individually or as part of a pool), if necessary, as a component of the allowance for loan losses. Refer to the "Impaired Loan" and "Allowance for Loan Loss" sections of Note 1 , "Summary of Significant Accounting Policies," in the "Notes to Consolidated Financial Statements" of our 2014 Annual Report on Form 10-K regarding our policy for assessing potential impairment on such loans. Our allowance for loan losses included $4.9 million and $10.6 million in specific reserves for nonaccrual TDRs at September 30, 2015 , and December 31, 2014 , respectively. For accruing TDRs, there were $14,000 specific reserves at September 30, 2015 and none at December 31, 2014 , respectively, as the present value of cash flows for the restructured loan were greater than the recorded investment in the loan at December 31, 2014. During the three and nine months ended September 30, 2015 , a single commercial real estate loan totaling $175,000 became nonperforming within 12 months of being modified as an accruing TDR. During the nine months ended September 30, 2014 , a single commercial real estate loan totaling $699,000 became nonperforming within 12 months of being modified as an accruing TDR. A loan typically becomes nonperforming and placed on nonaccrual status when the principal or interest payments are 90 days past due based on contractual terms or when an individual analysis of a borrower’s creditworthiness indicates a loan should be placed on nonaccrual status earlier than the 90-day past due date. Other Real Estate Owned The following table presents the composition of property acquired as a result of borrower defaults on loans secured by real property. OREO Composition (Amounts in thousands) September 30, 2015 December 31, 2014 Single-family homes $ 6,354 $ 7,902 Land parcels 2,664 4,237 Multi-family 598 488 Office/industrial 1,799 3,832 Retail 1,345 957 Total OREO properties $ 12,760 $ 17,416 The recorded investment in consumer mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $5.1 million at September 30, 2015 , and $5.5 million at December 31, 2014 . Covered Assets Covered assets represent acquired residential mortgage loans and foreclosed real estate covered under a loss sharing agreement with the FDIC and include an indemnification receivable representing the present value of the expected reimbursement from the FDIC related to expected losses on the acquired loans and foreclosed real estate under such agreement. The loss share agreement will expire on September 30, 2019. The carrying amount of covered assets is presented in the following table. Covered Assets (Amounts in thousands) September 30, 2015 December 31, 2014 Residential mortgage loans (1) $ 26,526 $ 32,182 Foreclosed real estate - single family homes — 187 Estimated loss reimbursement by the FDIC 2,033 1,763 Total covered assets 28,559 34,132 Allowance for covered loan losses (6,337 ) (5,191 ) Net covered assets $ 22,222 $ 28,941 (1) Includes $262,000 and $420,000 of purchased credit-impaired loans as of September 30, 2015 , and December 31, 2014 , respectively. The recorded investment in residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $531,000 and $856,000 at September 30, 2015 and December 31, 2014 , respectively.

ALLOWANCE FOR LOAN LOSSES AND R

ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR UNFUNDED COMMITMENTS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR UNFUNDED COMMITMENTS	ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR UNFUNDED COMMITMENTS The following allowance and credit quality disclosures exclude covered loans. Refer to Note 4 for a discussion regarding covered loans. Allowance for Loan Losses and Recorded Investment in Loans (Amounts in thousands) Three Months Ended September 30, 2015 Commercial Commercial Real Estate Construction Residential Real Estate Home Equity Personal Total Allowance for Loan Losses: Balance at beginning of period $ 113,144 $ 28,210 $ 3,816 $ 5,257 $ 4,615 $ 2,009 $ 157,051 Loans charged-off (661 ) (175 ) — (97 ) (85 ) (6 ) (1,024 ) Recoveries on loans previously charged-off 2,115 134 10 198 50 131 2,638 Net recoveries (charge-offs) 1,454 (41 ) 10 101 (35 ) 125 1,614 Provision (release) for loan losses 6,413 (1,868 ) 571 (1,028 ) (292 ) 407 4,203 Balance at end of period $ 121,011 $ 26,301 $ 4,397 $ 4,330 $ 4,288 $ 2,541 $ 162,868 Ending balance for loans individually evaluated for impairment (1) $ 5,468 $ 1,465 $ — $ 558 $ 1,575 $ 6 $ 9,072 Ending balance for loans collectively evaluated for impairment $ 115,543 $ 24,836 $ 4,397 $ 3,772 $ 2,713 $ 2,535 $ 153,796 Recorded Investment in Loans: Ending balance, loans individually evaluated for impairment (1) $ 41,966 $ 12,041 $ — $ 4,272 $ 11,374 $ 26 $ 69,679 Ending balance, loans collectively evaluated for impairment 8,630,035 3,237,297 412,688 434,733 121,748 173,134 13,009,635 Total recorded investment in loans $ 8,672,001 $ 3,249,338 $ 412,688 $ 439,005 $ 133,122 $ 173,160 $ 13,079,314 (1) Refer to Note 4 for additional information regarding impaired loans. Allowance for Loan Losses and Recorded Investment in Loans (Continued) (Amounts in thousands) Three Months Ended September 30, 2014 Commercial Commercial Real Estate Construction Residential Real Estate Home Equity Personal Total Allowance for Loan Losses: Balance at beginning of period $ 96,326 $ 33,299 $ 3,621 $ 5,280 $ 5,015 $ 2,950 $ 146,491 Loans charged-off (227 ) (1,133 ) (7 ) (252 ) (172 ) (8 ) (1,799 ) Recoveries on loans previously charged-off 1,145 356 6 9 67 128 1,711 Net recoveries (charge-offs) 918 (777 ) (1 ) (243 ) (105 ) 120 (88 ) Provision (release) for loan losses 6,642 (2,135 ) 409 (25 ) (661 ) (498 ) 3,732 Balance at end of period $ 103,886 $ 30,387 $ 4,029 $ 5,012 $ 4,249 $ 2,572 $ 150,135 Ending balance for loans individually evaluated for impairment (1) $ 13,982 $ 3,223 $ — $ 497 $ 1,224 $ 55 $ 18,981 Ending balance for loans collectively evaluated for impairment $ 89,904 $ 27,164 $ 4,029 $ 4,515 $ 3,025 $ 2,517 $ 131,154 Recorded Investment in Loans: Ending balance, loans individually evaluated for impairment (1) $ 53,249 $ 19,886 $ — $ 9,723 $ 12,163 $ 544 $ 95,565 Ending balance, loans collectively evaluated for impairment 7,852,152 2,630,133 307,066 333,850 128,996 199,825 11,452,022 Total recorded investment in loans $ 7,905,401 $ 2,650,019 $ 307,066 $ 343,573 $ 141,159 $ 200,369 $ 11,547,587 (1) Refer to Note 4 for additional information regarding impaired loans. Allowance for Loan Losses (Amounts in thousands) Nine Months Ended September 30, Commercial Commercial Real Estate Construction Residential Real Estate Home Equity Personal Total 2015 Balance at beginning of year $ 103,462 $ 31,838 $ 4,290 $ 5,316 $ 4,924 $ 2,668 $ 152,498 Loans charged-off (5,784 ) (1,160 ) — (328 ) (456 ) (44 ) (7,772 ) Recoveries on loans previously charged-off 3,610 1,004 193 302 193 1,090 6,392 Net (charge-offs) recoveries (2,174 ) (156 ) 193 (26 ) (263 ) 1,046 (1,380 ) Provision (release) for loan losses 19,723 (5,381 ) (86 ) (960 ) (373 ) (1,173 ) 11,750 Balance at end of period $ 121,011 $ 26,301 $ 4,397 $ 4,330 $ 4,288 $ 2,541 $ 162,868 Allowance for Loan Losses (Continued) (Amounts in thousands) Nine Months Ended September 30, Commercial Commercial Construction Residential Home Personal Total 2014 Balance at beginning of year $ 80,768 $ 42,362 $ 3,338 $ 7,555 $ 5,648 $ 3,438 $ 143,109 Loans charged-off (3,856 ) (5,797 ) (7 ) (667 ) (887 ) (151 ) (11,365 ) Recoveries on loans previously charged-off 5,620 2,404 22 444 155 554 9,199 Net recoveries (charge-offs) 1,764 (3,393 ) 15 (223 ) (732 ) 403 (2,166 ) Provision (release) for loan losses 21,354 (8,582 ) 676 (2,320 ) (667 ) (1,269 ) 9,192 Balance at end of period $ 103,886 $ 30,387 $ 4,029 $ 5,012 $ 4,249 $ 2,572 $ 150,135 Reserve for Unfunded Commitments (1) (Amounts in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Balance at beginning of period $ 13,157 $ 9,363 $ 12,274 $ 9,206 Provision for unfunded commitments 2,048 481 2,931 638 Recovery of unfunded commitments 4 — 4 — Balance at end of period $ 15,209 $ 9,844 $ 15,209 $ 9,844 Unfunded commitments, excluding covered assets, at period end $ 6,310,701 $ 5,365,042 (1) Unfunded commitments include commitments to extend credit, standby letters of credit and commercial letters of credit. Unfunded commitments related to covered assets are excluded as they are covered under a loss sharing agreement with the FDIC. Refer to Note 15 for additional details of commitments to extend credit, standby letters of credit and commercial letters of credit.	[1]
[1]	Refer to Note 4 for additional information regarding impaired loans.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS Carrying Amount of Goodwill by Operating Segment (Amounts in thousands) September 30, December 31, 2014 Banking $ 81,755 $ 81,755 Asset management 12,286 12,286 Total goodwill $ 94,041 $ 94,041 Goodwill is not amortized but, instead, is subject to impairment tests at least on an annual basis or more often if events or circumstances occur that would indicate it is more likely than not that the fair value of a reporting unit is below its carrying value. Our annual goodwill impairment test was performed as of October 31, 2014, and it was determined no impairment existed as of that date nor are we aware of any events or circumstances that would indicate goodwill is impaired at September 30, 2015 . There were no impairment charges for goodwill recorded in 2014. Our annual goodwill test will be completed during fourth quarter 2015. We have other intangible assets capitalized on the Consolidated Statements of Financial Condition in the form of core deposit premiums and client relationships. These intangible assets are being amortized over their estimated useful lives, which range from 8 to 12 years . We review other intangible assets for possible impairment whenever events or changes in circumstances indicate that carrying amounts may not be recoverable. During third quarter 2015 , there were no events or circumstances that we believe indicate there may be impairment of other intangible assets, and no impairment charges for other intangible assets were recorded for the nine months ended September 30, 2015 . Other Intangible Assets (Dollars in thousands) Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Core deposit intangibles: Gross carrying amount $ 18,093 $ 18,093 Accumulated amortization 14,603 12,870 Net carrying amount $ 3,490 $ 5,223 Amortization during the period $ 1,733 $ 2,799 Weighted average remaining life (in years) 2 2 Client relationships: Gross carrying amount $ 2,002 $ 2,002 Accumulated amortization 1,484 1,340 Net carrying amount $ 518 $ 662 Amortization during the period $ 144 $ 208 Weighted average remaining life (in years) 5 6 Scheduled Amortization of Other Intangible Assets (Amounts in thousands) Total Year ending December 31, 2015 - remaining three months $ 578 2016 2,161 2017 1,125 2018 98 2019 28 2020 and thereafter 18 Total $ 4,008

SHORT-TERM BORROWINGS

SHORT-TERM BORROWINGS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
SHORT-TERM BORROWINGS	SHORT-TERM BORROWINGS Summary of Short-Term Borrowings (Dollars in thousands) September 30, 2015 December 31, 2014 Amount Rate Amount Rate Outstanding: Repurchase agreements $ 57,965 0.40 % $ — — % FHLB advances 452,000 0.15 % 428,000 0.13 % Secured borrowings 4,156 4.10 % 4,385 4.45 % Total short-term borrowings $ 514,121 $ 432,385 Unused Availability: Federal funds (1) $ 630,500 $ 630,500 FRB discount window primary credit program (2) 363,590 403,752 FHLB advances (3) 1,506,937 265,529 Revolving line of credit 60,000 60,000 (1) Our total availability of overnight Federal fund ("Fed funds") borrowings is not a committed line of credit and is dependent upon lender availability. (2) Our borrowing capacity changes each quarter subject to available collateral and FRB discount factors. (3) As a member of the FHLB Chicago, the Bank has access to borrowing capacity which is subject to change based on the availability of acceptable collateral to pledge and the level of our investment in FHLB Chicago stock. At September 30, 2015 , our borrowing capacity was $2.4 billion , of which $1.5 billion is available, subject to making the required additional investment in FHLB Chicago stock. Qualifying residential, multi-family and commercial real estate loans, home equity lines of credit, and residential mortgage-backed securities are pledged as collateral to secure current outstanding balances and additional borrowing availability. Borrowings with maturities of one year or less are classified as short-term. Repurchase Agreements - Repurchase agreements are agreements to sell securities subject to an obligation to repurchase the same or similar securities. Securities sold under agreements to repurchase are treated as a financing, and the obligations to repurchase securities sold are reflected as a liability in the Consolidated Statements of Financial Condition. Repurchase agreements generally mature within 1 to 90 days from the transaction date. At September 30, 2015 , the repurchase agreement obligation had a remaining contractual maturity of 13 days and was collateralized by $59.9 million of residential mortgage-backed securities, which were held in custody by third parties. The securities underlying the agreements remain in their respective accounts while pledged as collateral to our counter-party. The Company may be required to provide additional collateral based on the fair value of the underlying securities. The Company is therefore exposed to the risks that impact the fair value of its pledged securities, including interest rate movements, market liquidity, and credit events. As of September 30, 2015 , there were no amounts at risk under repurchase agreements with any individual counterparty or group of counterparties that exceeded 10% of stockholders' equity. FHLB Advances - At September 30, 2015 , FHLB advances consisted of $7.0 million from the FHLB Atlanta, of which $2.0 million is included in short-term borrowings, and $845.0 million from FHLB Chicago, of which $450.0 million is included in short-term borrowings. Revolving Line of Credit - The Company has a 364-day revolving line of credit (the "Facility") with a group of commercial banks allowing borrowing of up to $60.0 million , and maturing on September 23, 2016 . The interest rate applied to borrowings under the Facility will be elected by the Company at the time an advance is made; interest rate elections include either 30-day or 90-day LIBOR plus 1.75% or Prime minus 0.50% at the time the advance is made. Any amounts outstanding under the Facility upon or before maturity may be converted, at the Company's option, to an amortizing term loan, with the balance of such loan due September 24, 2018 . At September 30, 2015 , no amounts have been drawn on the Facility. Secured Borrowings - Secured borrowings represent amounts related to certain loan participation agreements on loans we originated that were classified as secured borrowings because they did not qualify for sale accounting treatment. A corresponding amount is recorded within loans on the Consolidated Statements of Financial Condition.

LONG-TERM DEBT Long-Term Debt

LONG-TERM DEBT Long-Term Debt	9 Months Ended
	Sep. 30, 2015
Long-term Debt, Unclassified [Abstract]
Long-Term Debt [Text Block]	LONG-TERM DEBT Long-Term Debt (Dollars in thousands) Rate Type Rate Maturity September 30, December 31, Parent Company: Junior Subordinated Debentures (1) Bloomfield Hills Statutory Trust I Floating, three-month LIBOR + 2.65% 2.98% 2034 $ 8,248 $ 8,248 PrivateBancorp Statutory Trust II Floating, three-month LIBOR + 1.71% 2.05% 2035 51,547 51,547 PrivateBancorp Statutory Trust III Floating, three-month LIBOR + 1.50% 1.84% 2035 41,238 41,238 PrivateBancorp Statutory Trust IV Fixed 10.00% 2068 68,755 68,755 Subordinated debt facility (2) Fixed 7.125% 2042 125,000 125,000 Subtotal 294,788 294,788 Subsidiaries: FHLB advances Floating, FHLBC overnight discount note index + 0.065% 0.10% 2017 350,000 — FHLB advances (3)(4) Fixed 3.58% - 4.68% 2019 50,000 50,000 Total long-term debt $ 694,788 $ 344,788 (1) Under the final regulatory capital rules issued in July 2013, these instruments are grandfathered for inclusion as a component of Tier 1 capital, although the Tier 1 capital treatment for these instruments could be subject to phase-out due to certain acquisitions. (2) Qualifies as Tier 2 capital for regulatory capital purposes. (3) Weighted average interest rate was 3.75% at September 30, 2015 and December 31, 2014 . (4) Amounts reported at September 30, 2015 and December 31, 2014 include three long-term advances totaling $45.0 million with a weighted average interest rate of 3.66% due in 2019. The advances provide for a one-time option, two years from issuance date, to increase the amount outstanding up to $150.0 million each at the same fixed rate as the original advance. The advances include a prepayment feature and are subject to a prepayment fee. The $169.8 million in junior subordinated debentures presented in the table above were issued to four separate wholly-owned trusts for the purpose of issuing Company-obligated mandatorily redeemable trust preferred securities. Refer to Note 9 for further information on the nature and terms of these and previously issued debentures. At September 30, 2015 , outstanding long-term FHLB advances were secured by qualifying residential, multi-family, commercial real estate, and home equity lines of credit. From time to time, we may pledge eligible real estate mortgage-backed securities to support additional borrowings. We reclassify long-term debt to short-term borrowings when the remaining maturity becomes less than one year. Scheduled Maturities of Long-Term Debt (Amounts in thousands) Total Year ending December 31, 2017 $ 350,000 2019 50,000 2020 and thereafter 294,788 Total $ 694,788

JUNIOR SUBORDINATED DEFERRABLE

JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES HELD BY TRUSTS THAT ISSUED GUARANTEED CAPITAL DEBT SECURITIES	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES HELD BY TRUSTS THAT ISSUED GUARANTEED CAPITAL DEBT SECURITIES	JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES HELD BY TRUSTS THAT ISSUED GUARANTEED CAPITAL DEBT SECURITIES As of September 30, 2015 , we sponsored and wholly owned 100% of the common equity of four trusts that were formed for the purpose of issuing Company-obligated mandatorily redeemable trust preferred securities ("Trust Preferred Securities") to third-party investors and investing the proceeds from the sale of the Trust Preferred Securities solely in a series of junior subordinated debentures of the Company ("Debentures"). The Debentures held by the trusts, which in aggregate totaled $169.8 million at September 30, 2015 , are the sole assets of each respective trust. Our obligations under the Debentures and related documents, including the indentures, the declarations of trust and related Company guarantees, taken together, constitute a full and unconditional guarantee by the Company on a subordinated basis of distributions and redemption payments and liquidation payments on the Trust Preferred Securities. We currently have the right to redeem, in whole or in part, subject to any required regulatory approval, all or any series of the Debentures, in each case, at a redemption price of 100% of the principal amount of the Debentures being redeemed plus any accrued but unpaid interest to the redemption date. The repayment, redemption or repurchase of any of the Debentures would be subject to the terms of the applicable indenture and would result in a corresponding repayment, redemption or repurchase of an equivalent amount of the related series of Trust Preferred Securities. Any redemption of the 10% Debentures held by the PrivateBancorp Capital Trust IV ("Capital Trust IV") would be subject to the terms of the replacement capital covenant described below and any required regulatory approval. In connection with the issuance in 2008 of the 10% Debentures, which rank junior to the other Debentures, we entered into a replacement capital covenant that relates to the redemption of the 10% Debentures and the related Trust Preferred Securities. Under the replacement capital covenant, as amended in October 2012, we committed, for the benefit of certain debt holders, that we would not repay, redeem or repurchase the 10% Debentures or the related Trust Preferred Securities prior to June 2048 unless we have (1) obtained any required regulatory approval, and (2) raised certain amounts of qualifying equity or equity-like replacement capital at any time after October 10, 2012. The replacement capital covenant benefits holders of our "covered debt" as specified under the terms of the replacement capital covenant. Currently, under the replacement capital covenant, the "covered debt" is the Debentures held by PrivateBancorp Statutory Trust II. In the event that the Company's 7.125% subordinated debentures due 2042 are designated as or become the covered debt under the replacement capital covenant, the terms of such debentures provide that the Company is authorized to terminate the replacement capital covenant without any further action or payment. We may amend or terminate the replacement capital covenant in certain circumstances without the consent of the holders of the covered debt. Under current accounting rules, the trusts qualify as variable interest entities for which we are not the primary beneficiary and therefore are ineligible for consolidation in our financial statements. The Debentures issued by us to the trusts are included in our Consolidated Statements of Financial Condition as "long-term debt" with the corresponding interest distributions recorded as interest expense. The common shares issued by the trusts are included in other assets in our Consolidated Statements of Financial Condition with the related dividend distributions recorded in other non-interest income. Common Securities, Preferred Securities, and Related Debentures (Dollars in thousands) Common Securities Issued Trust Preferred Securities Issued (1) Principal Amount of Debentures (1) Issuance Date Coupon Rate (2) Maturity September 30, Bloomfield Hills Statutory Trust I May 2004 $ 248 $ 8,000 2.98 % June 2034 $ 8,248 PrivateBancorp Statutory Trust II June 2005 1,547 50,000 2.05 % Sept. 2035 51,547 PrivateBancorp Statutory Trust III Dec. 2005 1,238 40,000 1.84 % Dec. 2035 41,238 PrivateBancorp Capital Trust IV May 2008 5 68,750 10.00 % June 2068 68,755 Total $ 3,038 $ 166,750 $ 169,788 (1) The Trust Preferred Securities accrue distributions at a rate equal to the interest rate on, and have a maturity identical to that of, the related Debentures. The Trust Preferred Securities are subject to mandatory redemption, in whole or in part, upon repayment of the Debentures at maturity or upon their earlier redemption in whole or in part. The Debentures are redeemable in whole or in part prior to maturity at any time and only after we have obtained Federal Reserve approval, if then required under applicable guidelines or regulations. (2) Reflects the coupon rate in effect at September 30, 2015 . The coupon rate for Bloomfield Hills Statutory Trust I is a variable rate based on three-month LIBOR plus 2.65% . The coupon rates for PrivateBancorp Statutory Trusts II and III are at a variable rate based on three-month LIBOR plus 1.71% for Trust II and three-month LIBOR plus 1.50% for Trust III. The coupon rate for PrivateBancorp Capital Trust IV is fixed. Distributions on all Trust Preferred Securities are payable quarterly. We have the right to defer payment of interest on the Debentures at any time or from time to time for a period not exceeding ten years, in the case of the Debentures held by Trust IV, and five years, in the case of all other Debentures, without causing an event of default under the related indenture, provided no extension period may extend beyond the stated maturity of the Debentures. During such extension period, distributions on the trust preferred securities would also be deferred, and our ability to pay dividends on our common stock would generally be prohibited. The Federal Reserve has the ability to prevent interest payments on the Debentures.

EQUITY

EQUITY	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
EQUITY	EQUITY Preferred Stock At September 30, 2015 , and December 31, 2014 , there were one million shares of preferred stock authorized and none issued or outstanding. Nonvoting Common Stock At September 30, 2015 , and December 31, 2014 , there were five million shares of nonvoting common stock authorized and none issued or outstanding. Treasury Stock The Company reissues treasury stock, when available, or new shares to fulfill its obligation to issue shares granted pursuant to the share-based compensation plans. Treasury shares are reissued at average cost. The Company held 1,601 shares and 1,704 shares in treasury at September 30, 2015 , and December 31, 2014 , respectively. Comprehensive Income Change in Accumulated Other Comprehensive Income ("AOCI") by Component (Amounts in thousands) Nine Months Ended September 30, 2015 2014 Unrealized Gain on Available-for-Sale Securities Accumulated (Loss) Gain on Effective Cash Flow Hedges Total Unrealized Gain on Available-for-Sale Securities Accumulated (Loss) Gain on Effective Cash Flow Hedges Total Balance at beginning of period $ 19,448 $ 1,469 $ 20,917 $ 12,960 $ (3,116 ) $ 9,844 Increase in unrealized gains on securities 3,857 — 3,857 8,133 — 8,133 Increase in unrealized gains on cash flow hedges — 18,387 18,387 — 9,710 9,710 Tax expense on increase in unrealized gains (1,536 ) (7,139 ) (8,675 ) (3,216 ) (3,815 ) (7,031 ) Other comprehensive income before reclassifications 2,321 11,248 13,569 4,917 5,895 10,812 Reclassification adjustment of net gains included in net income (1) (918 ) (7,643 ) (8,561 ) (530 ) (6,763 ) (7,293 ) Reclassification adjustment for tax expense on realized net gains (2) 356 2,968 3,324 209 2,664 2,873 Amounts reclassified from AOCI (562 ) (4,675 ) (5,237 ) (321 ) (4,099 ) (4,420 ) Net current period other comprehensive income 1,759 6,573 8,332 4,596 1,796 6,392 Balance at end of period $ 21,207 $ 8,042 $ 29,249 $ 17,556 $ (1,320 ) $ 16,236 (1) The amounts reclassified from AOCI for the available-for-sale securities are reported in net securities gains on the Consolidated Statements of Income, while the amounts reclassified from AOCI for cash flow hedges are reported in interest income on loans on the Consolidated Statements of Income. For the nine months ended September 30, 2015, $125,000 was reclassified out of AOCI related to OTTI on available-for-sale securities and included in the Consolidated Statement of Income within net securities gains. (2) The tax expense amounts reclassified from AOCI in connection with the available-for-sale securities reclassification and cash flow hedges reclassification are reported in income tax provision on the Consolidated Statements of Income.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
EARNINGS PER COMMON SHARE	EARNINGS PER COMMON SHARE Basic and Diluted Earnings per Common Share (Amounts in thousands, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Basic earnings per common share Net income $ 45,268 $ 40,527 $ 133,174 $ 115,856 Net income allocated to participating stockholders (1) (354 ) (515 ) (1,195 ) (1,666 ) Net income allocated to common stockholders $ 44,914 $ 40,012 $ 131,979 $ 114,190 Weighted-average common shares outstanding 78,144 77,110 77,834 76,951 Basic earnings per common share $ 0.58 $ 0.52 $ 1.70 $ 1.48 Diluted earnings per common share Diluted earnings applicable to common stockholders (2) $ 44,922 $ 40,017 $ 131,997 $ 114,206 Weighted-average diluted common shares outstanding: Weighted-average common shares outstanding 78,144 77,110 77,834 76,951 Dilutive effect of stock awards (3) 1,257 824 1,193 770 Weighted-average diluted common shares outstanding 79,401 77,934 79,027 77,721 Diluted earnings per common share $ 0.57 $ 0.51 $ 1.67 $ 1.47 (1) Participating stockholders are those that hold certain share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. Such shares or units are considered participating securities (i.e., certain of the Company’s deferred and restricted stock units and nonvested restricted stock awards). (2) Net income allocated to common stockholders for basic and diluted earnings per share may differ under the two-class method as a result of adding common stock equivalents for options to dilutive shares outstanding, which alters the ratio used to allocate earnings to common stockholders and participating securities for the purposes of calculating diluted earnings per share. (3) For the quarters ended September 30, 2015 and 2014 , the weighted-average outstanding non-participating securities of 240,000 and 1.3 million shares, respectively, and for the nine months ended September 30, 2015 and 2014 , the weighted-average outstanding non-participating securities of 401,000 and 1.3 million shares, respectively, were not included in the computation of diluted earnings per common share because their inclusion would have been antidilutive for the periods presented.

INCOME TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
INCOME TAXES	INCOME TAXES Income Tax Provision Analysis (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Income before income taxes $ 72,626 $ 65,701 $ 213,012 $ 188,050 Income tax provision: Current income tax provision $ 32,897 $ 31,406 $ 83,128 $ 77,359 Deferred income benefit (5,539 ) (6,232 ) (3,290 ) (5,165 ) Total income tax provision $ 27,358 $ 25,174 $ 79,838 $ 72,194 Effective tax rate 37.7 % 38.3 % 37.5 % 38.4 % Deferred Tax Assets Net deferred tax assets totaled $96.0 million at September 30, 2015 , and $98.2 million at December 31, 2014 . Net deferred tax assets are included in other assets in the accompanying Consolidated Statements of Financial Condition. At September 30, 2015 , we have concluded that it is more likely than not that the deferred tax assets will be realized and, accordingly, no valuation allowance was recorded. This conclusion was based in part on our recent earnings history, on both a book and tax basis, and our outlook for earnings and taxable income in future periods. At September 30, 2015 , and December 31, 2014 , we had $131,000 and $212,000 , respectively, of unrecognized tax benefits relating to uncertain tax positions that, if recognized, would impact the effective tax rate.

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS We utilize an overall risk management strategy that incorporates the use of derivative instruments to reduce both interest rate risk (relating to mortgage loan commitments and planned sales of loans) and foreign currency risk (relating to certain loans denominated in currencies other than the U.S. dollar). We also use these instruments to accommodate our clients as we provide them with risk management solutions. None of the client-related and other end-user derivatives, noted in the table below, were designated as hedging instruments for accounting purposes at September 30, 2015 , and December 31, 2014 . We also use interest rate derivatives to hedge variability in forecasted interest cash flows in our loan portfolio, which is comprised primarily of floating-rate loans. These derivatives are designated as cash flow hedges. Derivatives expose us to counterparty credit risk. Credit risk is managed through our standard underwriting process. Actual exposures are monitored against various types of credit limits established to contain risk within parameters. Additionally, credit risk is managed through the use of collateral, netting agreements, and the establishment of internal concentration limits by financial institution. Notional Amounts and Fair Value of Derivative Instruments (Amounts in thousands) Asset Derivatives Liability Derivatives September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 Notional (1) Fair Value Notional (1) Fair Value Notional (1) Fair Value Notional (1) Fair Value Derivatives designated as hedging instruments: Interest rate contracts $ 800,000 $ 12,451 $ 550,000 $ 4,542 $ — $ — $ 250,000 $ 2,715 Derivatives not designated as hedging instruments: Client-related derivatives: Interest rate contracts $ 3,900,911 $ 60,498 $ 3,881,202 $ 42,879 $ 3,820,911 $ 62,776 $ 3,743,827 $ 43,792 Foreign exchange contracts 176,060 4,741 98,285 5,183 162,394 3,958 86,582 4,659 Risk participation agreements (1) 86,318 15 98,478 19 121,377 52 100,941 24 Total client-related derivatives $ 65,254 $ 48,081 $ 66,786 $ 48,475 Other end-user derivatives: Foreign exchange contracts $ 18,754 $ 142 $ 18,551 $ 241 $ 5,098 $ 14 $ 2,892 $ 45 Mortgage banking derivatives 268 786 405 801 Total other end-user derivatives $ 410 $ 1,027 $ 419 $ 846 Total derivatives not designated as hedging instruments $ 65,664 $ 49,108 $ 67,205 $ 49,321 Netting adjustments (2) (18,137 ) (10,588 ) (45,238 ) (25,269 ) Total derivatives $ 59,978 $ 43,062 $ 21,967 $ 26,767 (1) The remaining average notional amounts are shown for risk participation agreements. (2) Represents netting of derivative asset and liability balances, and related cash collateral, with the same counterparty subject to master netting agreements. Refer to Note 14 for additional information regarding master netting agreements. Certain of our derivative contracts contain embedded credit risk contingent features, that if triggered, allow the derivative counterparty to either terminate the derivative or require additional collateral. These contingent features are triggered if we do not meet specified financial performance indicators such as minimum capital ratios under the Federal banking agencies’ guidelines. All such requirements were met at September 30, 2015 and December 31, 2014 . Details on these derivative contracts are set forth in the following table. Derivatives Subject to Credit Risk Contingency Features (Amounts in thousands) September 30, December 31, Fair value of derivatives with credit contingency features in a net liability position $ 11,151 $ 14,596 Collateral posted for those transactions in a net liability position $ 12,922 $ 16,865 If credit risk contingency features were triggered: Additional collateral required to be posted to derivative counterparties $ — $ — Outstanding derivative instruments that would be immediately settled $ 11,151 $ 14,596 Derivatives Designated in Hedge Relationships The objective of our hedging program is to use interest rate derivatives to manage our exposure to interest rate movements. Cash Flow Hedges – Under our cash flow hedging program, we enter into receive fixed/pay variable interest rate swaps to convert certain floating-rate commercial loan cash flows to fixed-rate to reduce the variability in forecasted interest cash flows due to market interest rate changes. We use regression analysis to assess the effectiveness of cash flow hedges at both the inception of the hedge relationship and on an ongoing basis. Ineffectiveness is generally measured as the amount by which the cumulative change in fair value of the hedging instrument exceeds the present value of the cumulative change in the expected cash flows of the hedged item. Measured ineffectiveness is recognized directly in other non-interest income in the Consolidated Statements of Income. During the nine months ended September 30, 2015 , there were no gains or losses from cash flow hedge derivatives related to ineffectiveness that were reclassified to current earnings. The effective portion of the gains or losses on cash flow hedges are recorded, net of tax, in accumulated other comprehensive income ("AOCI") and are subsequently reclassified to interest income on loans in the period that the hedged interest cash flows affect earnings. As of September 30, 2015 , the maximum length of time over which forecasted interest cash flows are hedged is five years . There are no components of derivative gains or losses excluded from the assessment of hedge effectiveness related to our cash flow hedge strategy. Change in Accumulated Other Comprehensive Income Related to Interest Rate Swaps Designated as Cash Flow Hedge (Amounts in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Pre-tax After-tax Pre-tax After-tax Pre-Tax After-tax Pre-Tax After-tax Accumulated unrealized gain (loss) at beginning of period $ 5,459 $ 3,339 $ 2,461 $ 1,501 $ 2,405 $ 1,469 $ (5,110 ) $ (3,116 ) Amount of gain (loss) recognized in AOCI (effective portion) 10,261 6,276 (2,168 ) (1,333 ) 18,387 11,248 9,710 5,895 Amount reclassified from AOCI to interest income on loans (2,571 ) (1,573 ) (2,456 ) (1,488 ) (7,643 ) (4,675 ) (6,763 ) (4,099 ) Accumulated unrealized gain at end of period $ 13,149 $ 8,042 $ (2,163 ) $ (1,320 ) $ 13,149 $ 8,042 $ (2,163 ) $ (1,320 ) As of September 30, 2015 , $5.5 million in net deferred gains , net of tax, recorded in AOCI are expected to be reclassified into earnings during the next twelve months. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, and the addition of other hedges subsequent to September 30, 2015 . During the nine months ended September 30, 2015 , there were no gains or losses from cash flow hedge derivatives reclassified to current earnings because it became probable that the original forecasted transaction would not occur. Derivatives Not Designated in Hedge Relationships Other End-User Derivatives – We use forward commitments to sell to-be-announced securities and other commitments to sell residential mortgage loans at specified prices to economically hedge the change in fair value of customer interest rate lock commitments and residential mortgage loans held-for-sale. The forward commitments to sell and the interest rate lock commitments are considered derivatives. At September 30, 2015 , the par value of our residential mortgage loans held-for-sale totaled $24.0 million , the notional value of our interest rate lock commitments totaled $61.0 million , and the notional value of our forward commitments to sell totaled $95.3 million . We are also exposed at times to foreign exchange risk as a result of originating loans in which the principal and interest are settled in a currency other than U.S. dollars. As of September 30, 2015 , our exposure was to the Euro, Canadian dollar, Danish kroner and British pound on $15.5 million of loans. We manage this risk using forward currency derivatives. Client-Related Derivatives – We offer, through our capital markets group, over-the-counter interest rate and foreign exchange derivatives to our clients, including but not limited to, interest rate swaps, interest rate options (also referred to as caps, floors, collars, etc.), foreign exchange forwards and options, as well as cash products such as foreign exchange spot transactions. When our clients enter into an interest rate or foreign exchange derivative transaction with us, we mitigate our exposure to market risk through the execution of off-setting positions with inter-bank dealer counterparties. Although the off-setting nature of transactions originated by our capital markets group limits our market risk exposure, they do expose us to other risks including counterparty credit, settlement, and operational risk. To accommodate our loan clients, we occasionally enter into risk participation agreements ("RPA") with counterparty banks to either accept or transfer a portion of the credit risk related to their interest rate derivatives or transfer a portion of the credit risk related to our interest rate derivatives. This allows clients to execute an interest rate derivative with one bank while allowing for distribution of the credit risk among participating members. We have entered into written RPAs in which we accept a portion of the credit risk associated with an interest rate derivative of another bank's loan client in exchange for a fee. We manage this credit risk through our loan underwriting process, and when appropriate, the RPA is backed by collateral provided by the clients under their loan agreement. The current payment/performance risk of written RPAs is assessed using internal risk ratings which range from 1 to 8 with the latter representing the highest credit risk. The risk rating is based on several factors including the financial condition of the RPA’s underlying derivative counterparty, present economic conditions, performance trends, leverage, and liquidity. The maximum potential amount of future undiscounted payments that we could be required to make under our written RPAs assumes that the underlying derivative counterparty defaults and that the floating interest rate index of the underlying derivative remains at zero percent. In the event that we would have to pay out any amounts under our RPAs, we will seek to maximize the recovery of these amounts from assets that our clients pledged as collateral for the derivative and the related loan. Risk Participation Agreements (Dollars in thousands) September 30, December 31, Fair value of written RPAs $ 52 $ 24 Range of remaining terms to maturity (in years) Less than 1 to 5 Less than 1 to 4 Range of assigned internal risk ratings 2 to 7 2 to 7 Maximum potential amount of future undiscounted payments $ 3,142 $ 3,927 Percent of maximum potential amount of future undiscounted payments covered by proceeds from liquidation of pledged collateral 43 % 25 % Gain (Loss) Recognized on Derivative Instruments Not Designated in Hedging Relationship (Amounts in thousands) Location in Consolidated Statement of Income Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Gain (loss) on client-related derivatives: Interest rate contracts Capital markets income $ 1,190 $ 1,626 $ 6,089 $ 6,644 Foreign exchange contracts Capital markets income 1,920 1,577 6,023 5,376 Risk participation agreements Capital markets income (12 ) 50 77 322 Total client-related derivatives 3,098 3,253 12,189 12,342 Gain (loss) on end-user derivatives: Foreign exchange derivatives Other income, service and charges income 558 1,028 1,108 776 Mortgage banking derivatives Mortgage banking income (466 ) 127 (125 ) (189 ) Total end-user derivatives 92 1,155 983 587 Total derivatives not designated in hedging relationship $ 3,190 $ 4,408 $ 13,172 $ 12,929

BALANCE SHEET OFFSETTING BALANC

BALANCE SHEET OFFSETTING BALANCE SHEET OFFSETTING	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
BALANCE SHEET OFFSETTING	BALANCE SHEET OFFSETTING Master Netting Agreements Certain financial instruments, including repurchase agreements, securities lending arrangements and derivatives, may be eligible for offset in the consolidated balance sheet and/or subject to enforceable master netting agreements or similar agreements. Authoritative accounting guidance permits the netting of financial assets and liabilities when a legally enforceable master netting agreement exists between us and a counterparty. A master netting agreement is an agreement between two counterparties who have multiple financial contracts with each other that provide for the net settlement of contracts through a single payment, in a single currency, in the event of default on or termination of any one contract. For those financial instruments subject to enforceable master netting agreements, assets and liabilities, and related cash collateral, with the same counterparty are reported on a net basis within the assets and liabilities on the Consolidated Statements of Financial Condition. Derivative contracts may require us to provide or receive cash or financial instrument collateral. Collateral associated with derivative assets and liabilities subject to enforceable master netting agreements with the same counterparty is posted on a net basis. We have pledged cash or financial collateral in accordance with each counterparty's collateral posting requirements for all of the Company's derivative assets and liabilities in a net liability position as of September 30, 2015 and December 31, 2014 . Certain collateral posting requirements are subject to posting thresholds and minimum transfer amounts, such that we are only required to post collateral once the posting threshold is met, and any adjustments to the amount of collateral posted must meet minimum transfer amounts. As of September 30, 2015 and December 31, 2014 , $27.1 million and $14.7 million of cash collateral pledged, respectively, was netted with the related financial liabilities on the Consolidated Statement of Financial Condition. To the extent not netted against fair values under a master netting agreement, the excess collateral received or pledged is included in other short-term borrowings or other investments, respectively. There was no excess cash collateral pledged at September 30, 2015 and December 31, 2014 . Any securities pledged to counterparties as financial instrument collateral remain on the Consolidated Statements of Financial Condition as long as we do not default. The following table presents information about our financial assets and liabilities and the related collateral by derivative type (e.g., interest rate contracts). As we post collateral with counterparties on the basis of our net position in all financial contracts with a given counterparty, the information presented below aggregates the financial contracts entered into with the same counterparty. Offsetting of Financial Assets and Liabilities (Amounts in thousands) Gross Amounts of Recognized Assets / Liabilities Gross Amounts Offset (2) Net Amount Presented on the Statement of Financial Condition Gross Amounts Not Offset on the Statement of Financial Condition (3) Net Amount Financial Instruments (4) Cash Collateral As of September 30, 2015 Financial assets: Derivatives (1) : Interest rate contracts $ 72,949 $ (15,228 ) $ 57,721 $ — $ — $ 57,721 Foreign exchange contracts 3,337 (2,867 ) 470 — — 470 Risk participation agreements 15 — 15 — — 15 Mortgage banking derivatives 42 (42 ) — — — — Total derivatives subject to a master netting agreement 76,343 (18,137 ) 58,206 — — 58,206 Total derivatives not subject to a master netting agreement 1,772 — 1,772 — — 1,772 Total derivatives $ 78,115 $ (18,137 ) $ 59,978 $ — $ — $ 59,978 Financial liabilities: Derivatives (1) : Interest rate contracts $ 62,776 $ (43,023 ) $ 19,753 $ (14,725 ) $ — $ 5,028 Foreign exchange contracts 2,846 (2,173 ) 673 (502 ) — 171 Risk participation agreements 52 — 52 (39 ) — 13 Mortgage banking derivatives 170 (42 ) 128 — — 128 Total derivatives subject to a master netting agreement 65,844 (45,238 ) 20,606 (15,266 ) — 5,340 Total derivatives not subject to a master netting agreement 1,361 — 1,361 — — 1,361 Total derivatives 67,205 (45,238 ) 21,967 (15,266 ) — 6,701 Repurchase agreements 57,965 — 57,965 (57,965 ) — — Total $ 125,170 $ (45,238 ) $ 79,932 $ (73,231 ) $ — $ 6,701 (1) All derivative contracts are over-the-counter contracts. (2) Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement. (3) Collateralization is determined at the counterparty level. If overcollateralization exists, the amount shown is limited to the fair value of the financial instrument. (4) Financial instruments are disclosed at fair value. Financial instrument collateral is allocated pro-rata amongst the derivative liabilities to which it relates. Offsetting of Financial Assets and Liabilities (Continued) (Amounts in thousands) Gross Amounts of Recognized Assets / Liabilities Gross Amounts Offset (2) Net Amount Presented on the Statement of Financial Condition Gross Amounts Not Offset on the Statement of Financial Condition (3) Net Amount Financial Instruments (4) Cash Collateral As of December 31, 2014 Financial assets: Derivatives (1) : Interest rate contracts $ 47,421 $ (7,433 ) $ 39,988 $ — $ — $ 39,988 Foreign exchange contracts 3,664 (3,154 ) 510 — — 510 Risk participation agreements 19 (1 ) 18 — — 18 Total derivatives subject to a master netting agreement 51,104 (10,588 ) 40,516 — — 40,516 Total derivatives not subject to a master netting agreement 2,546 — 2,546 — — 2,546 Total derivatives $ 53,650 $ (10,588 ) $ 43,062 $ — $ — $ 43,062 Financial liabilities: Derivatives (1) : Interest rate contracts $ 46,507 $ (24,067 ) $ 22,440 $ (17,755 ) $ — $ 4,685 Foreign exchange contracts 2,421 (1,202 ) 1,219 (965 ) — 254 Risk participation agreements 24 — 24 (19 ) — 5 Total derivatives subject to a master netting agreement 48,952 (25,269 ) 23,683 (18,739 ) — 4,944 Total derivatives not subject to a master netting agreement 3,084 — 3,084 — — 3,084 Total derivatives $ 52,036 $ (25,269 ) $ 26,767 $ (18,739 ) $ — $ 8,028 (1) All derivative contracts are over-the-counter contracts. (2) Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement. (3) Collateralization is determined at the counterparty level. If overcollateralization exists, the amount shown is limited to the fair value of the financial instrument. (4) Financial instruments are disclosed at fair value. Financial instrument collateral is allocated pro-rata amongst the derivative liabilities to which it relates.

COMMITMENTS, GUARANTEES, AND CO

COMMITMENTS, GUARANTEES, AND CONTINGENT LIABILITIES	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
COMMITMENTS, GUARANTEES, AND CONTINGENT LIABILITIES	COMMITMENTS, GUARANTEES, AND CONTINGENT LIABILITIES Credit Extension Commitments and Guarantees In the normal course of business, we enter into a variety of financial instruments with off-balance sheet risk to meet the financing needs of our clients and to conduct lending activities. These instruments principally include commitments to extend credit, standby letters of credit, and commercial letters of credit. These instruments involve, to varying degrees, elements of credit and liquidity risk in excess of the amounts reflected in the Consolidated Statements of Financial Condition. Contractual or Notional Amounts of Financial Instruments (1) (Amounts in thousands) September 30, December 31, Commitments to extend credit: Home equity lines $ 135,799 $ 129,943 Residential 1-4 family construction 38,412 53,847 Commercial real estate, other construction, and land development 1,275,564 1,123,123 Commercial and industrial 3,948,742 4,031,217 All other commitments 505,226 336,623 Total commitments to extend credit $ 5,903,743 $ 5,674,753 Letters of credit: Financial standby $ 370,300 $ 334,175 Performance standby 40,067 38,167 Commercial letters of credit 6,160 5,224 Total letters of credit $ 416,527 $ 377,566 (1) Includes covered loan commitments of $9.6 million and $11.0 million as of September 30, 2015 , and December 31, 2014 , respectively. Commitments to extend credit are agreements to lend funds to, or issue letters of credit for the account of, a client as long as there is no violation of any condition established in the credit agreement. Commitments generally have fixed expiration dates or other termination clauses and variable interest rates tied to the prime rate or LIBOR and may require payment of a fee for the unused portion of the commitment or for the amounts issued but not drawn on letters of credit. All or a portion of unfunded commitments require regulatory capital support, except for unfunded commitments of less than one year that are unconditionally cancellable. Since many of our commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements of the borrowers. As of September 30, 2015 , we had a reserve for unfunded commitments of $15.2 million , which reflects our estimate of inherent losses associated with these commitment obligations. The balance of this reserve changes based on a number of factors, including the balance of outstanding commitments and our assessment of the likelihood of borrowers to utilize these commitments. The reserve is recorded in other liabilities in the Consolidated Statements of Financial Condition. Standby and commercial letters of credit are conditional commitments issued by us to guarantee the performance of a client to a third party. Standby letters of credit include performance and financial guarantees for clients in connection with contracts between our clients and third parties. Standby letters of credit are agreements where we are obligated to make payment to a third party on behalf of a client in the event the client fails to meet their contractual obligations. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn upon when the underlying transaction is consummated between the client and the third party. In most cases, the Company receives a fee for the amount of a letter of credit issued but not drawn upon. In the event of a client’s nonperformance, our credit loss exposure is equal to the contractual amount of those commitments. We manage this credit risk in a similar manner to evaluating credit risk in extending loans to clients under our credit policies. We use the same credit policies in making credit commitments as for on-balance sheet instruments, mitigating exposure to credit loss through various collateral requirements, if deemed necessary. In the event of nonperformance by the clients, we have rights to the underlying collateral, which could include commercial real estate, physical plant and property, inventory, receivables, cash and marketable securities. The maximum potential future payments guaranteed by us under standby letters of credit arrangements are equal to the contractual amount of the commitment. The unamortized fees associated with standby letters of credit, which are included in other liabilities in the Consolidated Statements of Financial Condition, totaled $2.2 million as of September 30, 2015 . We amortize these amounts into income over the commitment period. As of September 30, 2015 , standby letters of credit had a remaining weighted-average term of approximately 15 months , with remaining actual lives ranging from less than 1 year to 5 years . Other Commitments The Company has unfunded commitments to CRA investments and other investment partnerships totaling $37.8 million at September 30, 2015 . Of these commitments, $17.2 million related to legally-binding unfunded commitments for tax-credit investments and was included within other assets and other liabilities on the Consolidated Statements of Financial Condition. Credit Card Settlement Guarantees Our third-party corporate credit card provider issues corporate purchase credit cards on behalf of our commercial clients. The corporate purchase credit cards are issued to employees of certain of our commercial clients at the client’s direction and used for payment of business-related expenses. In most circumstances, these cards will be underwritten by our third-party provider. However, in certain circumstances, we may enter into a recourse agreement, which transfers the credit risk from the third-party provider to us in the event that the client fails to meet its financial payment obligation. In these circumstances, a total maximum exposure amount is established for our corporate client. In addition to the obligations presented in the prior table, the maximum potential future payments guaranteed by us under this third-party settlement guarantee were $17.0 million at September 30, 2015 . We believe that the estimated amounts of maximum potential future payments are not representative of our actual potential loss given our insignificant historical losses from this third-party settlement guarantee program. As of September 30, 2015 , we had no recorded contingent liability in the consolidated financial statements for this settlement guarantee program, and management believes that the probability of any loss under this arrangement is remote. Mortgage Loans Sold with Recourse Certain mortgage loans sold in the secondary market have limited recourse provisions. The losses for the nine months ended September 30, 2015 and 2014 , arising from limited recourse provisions were not material . Based on this experience, the Company has not established any liability for potential future losses relating to mortgage loans sold in prior periods. Legal Proceedings In June 2013, we were served with a complaint naming the Bank as an additional defendant in a lawsuit pending in the Circuit Court of the 21st Judicial Circuit, Kankakee County, Illinois, known as Maas vs. Marek et. al. The lawsuit, brought by the beneficiaries of two trusts for which the Bank is serving as the successor trustee, seeks reimbursement of penalties and interest assessed by the IRS due to the late payment of certain generation skipping taxes by the trusts, as well as certain related attorney fees and other damages. The other named defendants include legal and accounting professionals that provided services related to the matters involved. In January 2014, the Circuit Court denied the Bank’s motion to dismiss, and the matter is now in the discovery process. Although we are not able to predict the likelihood of an adverse outcome, we currently anticipate that ultimate resolution of this matter will not have a material adverse impact on our financial condition or results of operations. As of September 30, 2015 , there were various other legal proceedings pending against the Company and its subsidiaries in the ordinary course of business. Management does not believe that the outcome of these proceedings will have, individually or in the aggregate, a material adverse effect on the Company’s results of operations, financial condition or cash flows.

ESTIMATED FAIR VALUE OF FINANCI

ESTIMATED FAIR VALUE OF FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
ESTIMATED FAIR VALUE OF FINANCIAL INSTRUMENTS	ESTIMATED FAIR VALUE OF FINANCIAL INSTRUMENTS We measure, monitor, and disclose certain of our assets and liabilities on a fair value basis. Fair value is used on a recurring basis to account for securities available-for-sale, mortgage loans held-for-sale, derivative assets, derivative liabilities, and certain other assets and other liabilities. In addition, fair value is used on a nonrecurring basis to apply lower-of-cost-or-market accounting to foreclosed real estate and certain other loans held-for-sale, evaluate assets or liabilities for impairment, including collateral-dependent impaired loans, and for disclosure purposes. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, we use various valuation techniques and input assumptions when estimating fair value. U.S. GAAP requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value and establishes a fair value hierarchy that prioritizes the inputs used to measure fair value into three broad levels based on the reliability of the input assumptions. The hierarchy gives the highest priority to level 1 measurements and the lowest priority to level 3 measurements. The three levels of the fair value hierarchy are defined as follows: • Level 1 – Unadjusted quoted prices for identical assets or liabilities traded in active markets. • Level 2 – Observable inputs other than level 1 prices, such as quoted prices for similar instruments; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The categorization of where an asset or liability falls within the hierarchy is based on the lowest level of input that is significant to the fair value measurement. Valuation Methodology We believe our valuation methods are appropriate and consistent with other market participants. However, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value. Additionally, the methods used may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. The following describes the valuation methodologies we use for assets and liabilities measured at fair value, including the general classification of the assets and liabilities pursuant to the valuation hierarchy. Securities Available-for-Sale – Securities available-for-sale include U.S. Treasury, U.S. Agency, collateralized mortgage obligations, residential mortgage-backed securities, state and municipal securities, and foreign sovereign debt. Substantially all available-for-sale securities are fixed-income instruments that are not quoted on an exchange, but may be traded in active markets. The fair value of these securities is based on quoted market prices obtained from external pricing services. The principal markets for our securities portfolio are the secondary institutional markets, with an exit price that is predominantly reflective of bid level pricing in those markets. U.S. Treasury securities have been classified in level 1 of the valuation hierarchy. All other remaining securities are generally classified in level 2 of the valuation hierarchy. In cases where significant credit valuation adjustments are incorporated into the estimation of fair value, reported amounts are classified as level 3. On a quarterly basis, the Company uses a variety of methods to validate the overall reasonableness of the fair values obtained from external pricing services, including evaluating pricing service inputs and methodologies, using exception reports based on analytical criteria, comparing prices obtained to prices received from other pricing sources, and reviewing the reasonableness of prices based on the Company’s knowledge of market liquidity and other market-related conditions. Mortgage Loans Held-for-Sale – Mortgage loans held-for-sale represent residential mortgage loan originations intended to be sold in the secondary market. We have elected the fair value option for residential mortgage loans originated with the intention of selling to a third party. The election of the fair value option aligns the accounting for these loans with the related mortgage banking derivatives used to economically hedge them. These mortgage loans are measured at fair value as of each reporting date, with changes in fair value recognized through mortgage banking non-interest income. The fair value of mortgage loans held-for-sale is determined based on prices obtained for loans with similar characteristics from third-party sources. On a quarterly basis, the Company validates the overall reasonableness of the fair values obtained from third-party sources by comparing prices obtained to prices received from various other pricing sources, and reviewing the reasonableness of prices based on Company knowledge of market liquidity and other market-related conditions. Mortgage loans held-for-sale are classified in level 2 of the valuation hierarchy. Collateral-Dependent Impaired Loans – We do not record loans held for investment at fair value on a recurring basis. However, periodically, we record nonrecurring adjustments to reduce the carrying value of certain impaired loans based on fair value measurement. This population of impaired loans includes those for which repayment of the loan is expected to be provided solely by the underlying collateral. We measure the fair value of collateral-dependent impaired loans based on the fair value of the collateral securing these loans less estimated selling costs. A majority of collateral-dependent impaired loans are secured by real estate with the fair value generally determined based upon appraisals performed by a certified or licensed appraiser using a combination of valuation techniques such as sales comparison, income capitalization and cost approach and include inputs such as absorption rates, capitalization rates and comparables. We also consider other factors or recent developments that could result in adjustments to the collateral value estimates indicated in the appraisals. When a collateral-dependent loan is secured by non-real estate collateral such as receivables, inventory, or equipment, the fair value is generally determined based upon appraisals, field exams, or receivable reports. The valuation techniques and inputs are reviewed internally by an asset-based specialist for reasonableness of estimated liquidation costs, collectability probabilities, and other market data. Accordingly, fair value estimates for collateral-dependent impaired loans are classified in level 3 of the valuation hierarchy. The carrying value of all impaired loans and the related specific reserves are disclosed in Note 4 . At the time a collateral-dependent loan is initially determined to be impaired, we review the existing appraisal. If the most recent appraisal is greater than one-year old, a new appraisal of the underlying collateral is obtained. For collateral-dependent impaired loans that are secured by real estate, we generally obtain "as is" appraisal values in order to evaluate impairment. Appraisals for real estate collateral-dependent impaired loans in excess of $500,000 are updated with new independent appraisals at least annually and are formally reviewed by our internal appraisal department. Additional diligence is performed at the six-month interval between annual appraisals. If during the course of the six-month review process there is evidence supporting a meaningful decline in the value of collateral, the appraised value is either adjusted downward or a new appraisal is required to support the value of the impaired loan . As part of our internal review process, we consider other factors or recent developments that could adjust the valuations indicated in the appraisals or internal reviews. The Company’s internal appraisal review process validates the reasonableness of appraisals in conjunction with analyzing sales and market data from an array of market sources. Covered Asset OREO and OREO – Covered asset OREO and OREO generated from our originated book of business are valued on a nonrecurring basis using third-party appraisals of each property and our judgment of other relevant market conditions and are classified in level 3 of the valuation hierarchy. As part of our internal review process, we consider other factors or recent developments that could adjust the valuations indicated in the appraisals or internal reviews. Updated appraisals on both OREO portfolios are typically obtained every twelve months and evaluated internally at least every six months. In addition, both property-specific and market-specific factors as well as collateral type factors are taken into consideration, which may result in obtaining more frequent appraisal updates or internal assessments. Appraisals are conducted by third-party independent appraisers under internal direction and engagement using a combination of valuation techniques such as sales comparison, income capitalization and cost approach and include inputs such as absorption rates, capitalization rate and comparables. Any appraisal with a value in excess of $250,000 is subject to a compliance review. Appraisals received with a value in excess of $1.0 million are subject to a technical review. Appraisals are either reviewed internally by our appraisal department or sent to an outside technical firm if appropriate. Both levels of review involve a scope appropriate for the complexity and risk associated with the OREO. To validate the reasonableness of the appraisals obtained, the Company compares the appraised value to the actual sales price of properties sold and analyzes the reasons why a property may be sold for less than its appraised value. Derivative Assets and Derivative Liabilities – Derivative instruments with positive fair values are reported as an asset and derivative instruments with negative fair value are reported as liabilities, in both cases after taking into account the effects of master netting agreements. For derivative counterparties with which we have a master netting agreement, we measure nonperformance risk on the basis of our net exposure to the counterparty. The fair value of derivative assets and liabilities is determined based on prices obtained from third-party advisors using standardized industry models, or based on quoted market prices obtained from external pricing services. Many factors affect derivative values, including the level of interest rates, the market’s perception of our nonperformance risk as reflected in our credit spread, and our assessment of counterparty nonperformance risk. The nonperformance risk assessment is based on our evaluation of credit risk, or if available, on observable external assessments of credit risk. Values of derivative assets and liabilities are primarily based on observable inputs and are classified in level 2 of the valuation hierarchy, with the exception of certain client-related derivatives, risk participation agreements, and interest rate lock commitments, as discussed below. On a quarterly basis, the Company uses a variety of methods to validate the overall reasonableness of the fair values obtained from third-party advisors, including evaluating inputs and methodologies used by the third-party advisors, comparing prices obtained to prices received from other pricing sources, and reviewing the reasonableness of prices based on the Company's knowledge of market liquidity and other market-related conditions. While we may challenge valuation inputs used in determining prices obtained from third parties based on our validation procedures, during the quarters ended September 30, 2015 and 2014 , we did not alter the fair values ultimately provided by the third-party advisors. Level 3 derivatives include risk participation agreements, derivatives associated with clients whose loans are risk rated 6 or higher ("watch list derivative"), and interest rate lock commitments. Refer to "Credit Quality Indicators" in Note 4 for further discussion of risk ratings. For the level 3 risk participation agreements and watch list derivatives, the Company obtains prices from third-party advisors, consistent with the valuation processes employed for the Company’s derivatives classified in level 2 of the fair value hierarchy, and then applies loss factors to adjust the prices obtained from third-party advisors. The significant unobservable inputs that are employed in the valuation process for the risk participation agreements and watch list derivatives that cause these derivatives to be classified in level 3 of the fair value hierarchy are the historic loss factors specific to the particular industry segment and risk rating category. The loss factors are updated quarterly and are derived and aligned with the loss factors utilized in the calculation of the Company’s general reserve component of the allowance for loan losses. Changes in the fair value measurement of risk participation agreements and watch list derivatives are largely due to changes in the fair value of the derivative, risk rating adjustments and fluctuations in the pertinent historic average loss rate. For the interest rate lock commitments on mortgage loans, the fair value is based on prices obtained for loans with similar characteristics from third-party sources, adjusted for the probability that the interest rate lock commitment will fund (the “pull-through” rate). The significant unobservable input that causes these derivatives to be classified in level 3 of the fair value hierarchy is the pull-through rate. Pull-through rates are derived using the Company’s historical data and reflect the Company’s best estimate of the likelihood that a committed loan will ultimately fund. Significant increases in this input in isolation would result in a significantly higher fair value measurement and significant decreases would result in a significantly lower fair value measurement. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table presents the hierarchy level and fair value for each major category of assets and liabilities measured at fair value at September 30, 2015 , and December 31, 2014 on a recurring basis. Fair Value Measurements on a Recurring Basis (Amounts in thousands) September 30, 2015 December 31, 2014 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets: Securities available-for sale: U.S. Treasury $ 269,734 $ — $ — $ 269,734 $ 268,265 $ — $ — $ 268,265 U.S. Agency — 46,735 — 46,735 — 46,258 — 46,258 Collateralized mortgage obligations — 108,385 — 108,385 — 136,933 — 136,933 Residential mortgage-backed securities — 825,595 — 825,595 — 846,078 — 846,078 State and municipal securities — 452,506 971 453,477 — 347,310 — 347,310 Foreign sovereign debt — — — — — 500 — 500 Total securities available-for-sale 269,734 1,433,221 971 1,703,926 268,265 1,377,079 — 1,645,344 Mortgage loans held-for-sale — 24,065 — 24,065 — 42,215 — 42,215 Derivative assets: Interest rate contract derivatives designated as hedging instruments — 12,451 — 12,451 — 4,542 — 4,542 Client-related derivatives — 64,335 919 65,254 — 46,669 1,412 48,081 Other end-user derivatives — 184 226 410 — 241 786 1,027 Netting adjustments — (18,007 ) (130 ) (18,137 ) — (9,952 ) (636 ) (10,588 ) Total derivative assets — 58,963 1,015 59,978 — 41,500 1,562 43,062 Total assets $ 269,734 $ 1,516,249 $ 1,986 $ 1,787,969 $ 268,265 $ 1,460,794 $ 1,562 $ 1,730,621 Liabilities: Derivative liabilities: Interest rate contract derivatives designated as hedging instruments $ — $ — $ — $ — $ — $ 2,715 $ — $ 2,715 Client-related derivatives — 66,609 177 66,786 — 47,799 676 48,475 Other end-user derivatives — 184 235 419 — 45 801 846 Netting adjustments — (45,113 ) (125 ) (45,238 ) — (24,633 ) (636 ) (25,269 ) Total derivative liabilities $ — $ 21,680 $ 287 $ 21,967 $ — $ 25,926 $ 841 $ 26,767 If a change in valuation techniques or input assumptions for an asset or liability occurred between periods, we would consider whether this would result in a transfer between the three levels of the fair value hierarchy. There have been no transfers of assets or liabilities between level 1 and level 2 of the valuation hierarchy between December 31, 2014 , and September 30, 2015 . There have been no other changes in the valuation techniques we used for assets and liabilities measured at fair value on a recurring basis from December 31, 2014 , to September 30, 2015 . Reconciliation of Beginning and Ending Fair Value for Those Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (1) (Amounts in thousands) Three Months Ended September 30, 2015 2014 Available- for-Sale Securities Derivative Assets Derivative (Liabilities) Derivative Assets Derivative (Liabilities) Balance at beginning of period $ — $ 1,081 $ (295 ) $ 2,712 $ (1,474 ) Total gains: Included in earnings (2) — 479 (406 ) (71 ) 216 Purchases, issuances, sales and settlements: Issuances — 297 — 84 — Settlements — (976 ) 289 (492 ) 387 Transfers into Level 3 (out of Level 2) (3) 971 265 — 56 — Transfers out of Level 3 (into Level 2) (3) — (1 ) — (335 ) 197 Balance at end of period $ 971 $ 1,145 $ (412 ) $ 1,954 $ (674 ) Change in unrealized gains in earnings relating to assets and liabilities still held at end of period $ — $ 176 $ 109 $ 30 $ 131 Nine Months Ended September 30 2015 2014 Available- for-Sale Securities Derivative Assets Derivative (Liabilities) Derivative Assets Derivative (Liabilities) Balance at beginning of period $ — $ 2,198 $ (1,477 ) $ 789 $ (201 ) Total gains: Included in earnings (2) — 237 (107 ) 155 759 Purchases, issuances, sales and settlements: Issuances — 802 — 496 — Settlements — (2,339 ) 873 (1,672 ) (35 ) Transfers into Level 3 (out of Level 2) (3) 971 1,433 (160 ) 2,635 (1,394 ) Transfers out of Level 3 (into Level 2) (3) — (1,186 ) 459 (449 ) 197 Balance at end of period $ 971 $ 1,145 $ (412 ) $ 1,954 $ (674 ) Change in unrealized gains in earnings relating to assets and liabilities still held at end of period $ — $ 429 $ 147 $ 127 $ 959 (1) Fair value is presented prior to giving effect to netting adjustments. (2) Amounts disclosed in this line are included in the Consolidated Statements of Income as capital markets products income for derivatives and mortgage banking income for interest rate lock commitments. (3) Transfers in and transfers out are recognized at the end of each quarterly reporting period. Investment securities transferred into Level 3 from Level 2 relate to a reclassification of certain municipal bonds. In general, derivative assets and liabilities are transferred into Level 3 from Level 2 due to a lack of observable market data, as there was deterioration in the credit risk of the derivative counterparty. Conversely, derivative assets and liabilities are transferred out of Level 3 into Level 2 due to an improvement in the credit risk of the derivative counterparty. Financial Instruments Recorded Using the Fair Value Option Difference Between Aggregate Fair Value and Aggregate Remaining Principal Balance for Mortgage Loans Held-For-Sale Elected to be Carried at Fair Value (Amounts in thousands) September 30, December 31, Aggregate fair value $ 24,065 $ 42,215 Difference (1) (108 ) (16 ) Aggregate unpaid principal balance $ 23,957 $ 42,199 (1) The change in fair value is reflected in mortgage banking non-interest income. As of September 30, 2015 and December 31, 2014 , none of the mortgage loans held-for-sale were on nonaccrual or 90 days or more past due and still accruing interest. Changes in fair value due to instrument-specific credit risk for the nine months ended September 30, 2015 , were not material . Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis From time to time, we may be required to measure certain other financial assets at fair value on a nonrecurring basis. These adjustments to fair value usually result from the application of lower-of-cost-or-fair-value accounting or write-downs of individual assets when there is evidence of impairment. The following table provides the fair value of those assets that were subject to fair value adjustments during the nine months ended September 30, 2015 and 2014 , and still held at September 30, 2015 and 2014 , respectively. All fair value measurements on a nonrecurring basis were measured using level 3 of the valuation hierarchy. Fair Value Measurements on a Nonrecurring Basis (Amounts in thousands) Fair Value Net Losses September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Collateral-dependent impaired loans (1) $ 20,317 $ 36,048 $ 1,398 $ 12,708 OREO (2) 8,423 11,704 1,666 4,750 Total $ 28,740 $ 47,752 $ 3,064 $ 17,458 (1) Represents the fair value of loans adjusted to the appraised value of the collateral with a write-down in fair value or change in specific reserves during the respective period. These fair value adjustments are recorded against the allowance for loan losses. (2) Represents the fair value of foreclosed properties that were adjusted subsequent to their initial classification as foreclosed assets. Write-downs are recognized as a component of net foreclosed property expenses in the Consolidated Statements of Income. There have been no changes in the valuation techniques we used for assets and liabilities measured at fair value on a nonrecurring basis from December 31, 2014 , to September 30, 2015 . Additional Information Regarding Level 3 Fair Value Measurements The following table presents information regarding the unobservable inputs developed by the Company for its level 3 fair value measurements. Quantitative Information Regarding Level 3 Fair Value Measurements (Dollars in thousands) Financial Instrument: Fair Value of Assets / (Liabilities) at September 30, 2015 Valuation Technique(s) Unobservable Input Range Weighted Average Investment securities $ 971 Bond pricing Equivalent rating Ba1-Aa3 N/A Watch list derivatives $ 780 Discounted cash flow Loss factors 7.5% to 17.3% 11.6 % Risk participation agreements $ (38 ) (1) Discounted cash flow Loss factors 1.0% to 17.3% 8.6 % Interest rate lock commitments $ 313 Discounted cash flow Pull-through rate 64.8% to 100.0% 81.2 % Collateral-dependent impaired loans $ 20,317 Sales comparison, Property specific -0.2% to -27.8% -8.4 % (2) OREO $ 8,423 Sales comparison, Property specific -1.0% to -18.8% -6.8 % (2) (1) Represents fair value of underlying swap. (2) Weighted average is calculated based on assets with a property specific adjustment. The significant unobservable inputs used in the fair value measurement of the risk participation agreements and watch list derivatives are the historic loss factors. A significant increase (decrease) in the pertinent loss factor would result in a significantly lower (higher) fair value measurement. Estimated Fair Value of Certain Financial Instruments U.S. GAAP requires disclosure of the estimated fair values of certain financial instruments, both assets and liabilities, on-and off-balance sheet, for which it is practical to estimate fair value. Because the disclosure of estimated fair values provided herein excludes the fair value of certain other financial instruments and all non-financial instruments, any aggregation of the estimated fair value amounts presented would not represent total underlying value. Examples of non-financial instruments having value not disclosed herein include the future earnings potential of significant customer relationships and the value of our asset management operations and other fee-generating businesses. In addition, other significant assets including property, plant, and equipment and goodwill are not considered financial instruments and, therefore, have not been included in the disclosure. Various methodologies and assumptions have been utilized in management’s determination of the estimated fair value of our financial instruments, which are detailed below. The fair value estimates are made at a discrete point in time based on relevant market information. Because no market exists for a significant portion of these financial instruments, fair value estimates are based on judgments regarding future expected economic conditions, loss experience, and risk characteristics of the financial instruments. These estimates are subjective, involve uncertainties, and cannot be determined with precision. Changes in assumptions could significantly affect the estimates. In addition to the valuation methodology explained above for financial instruments recorded at fair value, the following methods and assumptions were used in estimating the fair value of financial instruments that are carried at cost in the Consolidated Statements of Financial Condition and includes the general classification of the assets and liabilities pursuant to the valuation hierarchy. Short-term financial assets and liabilities – For financial instruments with a shorter-term or with no stated maturity, prevailing market rates, and limited credit risk, the carrying amounts approximate fair value. Those financial instruments include cash and due from banks, Federal funds sold and interest-bearing deposits in banks (including the receivable for cash collateral pledged), accrued interest receivable, and accrued interest payable. Accrued interest receivable and accrued interest payable are classified consistent with the hierarchy of their corresponding assets and liabilities. Other loans held-for-sale - Included in loans held-for sale at September 30, 2015 , and December 31, 2014 are $52.2 million and $36.6 million , respectively, of loans carried at the lower of aggregate cost or fair value. Also included in loans held-for-sale at December 31, 2014 , are $36.3 million of loans held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015. Fair value estimates are based on the actual agreed upon price in the agreement. Securities held-to-maturity – Securities held-to-maturity include collateralized mortgage obligations, residential mortgage-backed securities, commercial mortgage-backed securities and state and municipal securities. Substantially all held-to-maturity securities are fixed income instruments that are not quoted on an exchange, but may be traded in active markets. The fair value of these securities is based on quoted market prices obtained from external pricing services. The principal markets for our securities portfolio are the secondary institutional markets, with an exit price that is predominantly reflective of bid level pricing in those markets. FHLB stock – The carrying value of FHLB stock approximates fair value as the stock is non-marketable, and can only be sold to the FHLB or another member institution at par. Loans – The fair value of loans is calculated by discounting estimated cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risk inherent in the loan. Cash flows are estimated by applying contractual payment terms to assumed interest rates. The estimate of maturity is based on contractual terms and includes assumptions that reflect our and the industry’s historical experience with repayments for each loan classification. The estimation is modified, as required, by the effect of current economic and lending conditions, collateral, and other factors. Covered assets – Covered assets include acquired loans and foreclosed loan collateral covered under a loss sharing agreement with the FDIC (including the fair value of expected reimbursements from the FDIC). The fair value of covered assets is calculated by discounting contractual cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risk inherent in the asset. The estimate of maturity is based on contractual terms and includes assumptions that reflect our and the industry’s historical experience with repayments for each asset classification. The estimate is modified, as required, by the effect of current economic and lending conditions, collateral, and other factors. Investment in BOLI – The cash surrender value of our investment in bank owned life insurance approximates the fair value. Community reinvestment investments - The fair values of these instruments were estimated using an income approach (discounted cash flow) that incorporates current market rates. Deposit liabilities – The fair values disclosed for noninterest-bearing deposits, savings deposits, interest-bearing demand deposits, and money market deposits are approximately equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). The fair values for certificates of deposit and time deposits were estimated using present value techniques by discounting the future cash flows at rates based on internal models and broker quotes. Deposits held-for-sale – Deposits held-for-sale are recorded at the lower of cost or fair value. Amounts held at December 31, 2014 , are deposits held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015. Fair value estimates are based upon the price and premium per the agreement. Short-term borrowings – The fair value of FHLB advances with remaining maturities of one year or less is estimated by discounting the obligations using the rates currently offered for borrowings of similar remaining maturities. The fair value of the repurchase obligation is considered to be equal to the carrying value because of its short-term nature. The fair value of secured borrowings is equal to the value of the loans they are collateralizing. See " Loans " above for further information. The carrying amount of the obligation for cash collateral held is considered to be its fair value because of its short-term nature. Long-term debt – The fair value of the Company's fixed-rate long-term debt was estimated using the unadjusted publicly-available market price as of period end. FHLB advances with remaining maturities greater than one year and the Company's variable-rate junior subordinated debentures are estimated by discounting future cash flows. For the FHLB advances with remaining maturities greater than one year, the Company discounts cash flows using quoted interest rates for similar financial instruments. For the Company's variable-rate junior subordinated debentures, we interpolate a discount rate we believe is appropriate based on quoted interest rates and entity specific adjustments. Commitments – Given the limited interest rate risk posed by the commitments outstanding at period end due to their variable rate structure, termination clauses provided in the agreements, and the market rate of fees charged, we have deemed the fair value of commitments outstanding to be immaterial. Financial Instruments (Amounts in thousands) As of September 30, 2015 Carrying Amount Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 145,477 $ 145,477 $ 145,477 $ — $ — Federal funds sold and interest-bearing deposits in banks 231,600 231,600 — 231,600 — Loans held-for-sale 76,225 76,225 — 76,225 — Securities available-for-sale 1,703,926 1,703,926 269,734 1,433,221 971 Securities held-to-maturity 1,293,433 1,304,477 — 1,304,477 — FHLB stock 30,740 30,740 — 30,740 — Loans, net of allowance for loan losses and unearned fees 12,916,446 12,837,378 — — 12,837,378 Covered assets, net of allowance for covered loan losses 22,222 28,386 — — 28,386 Accrued interest receivable 43,064 43,064 — — 43,064 Investment in BOLI 56,292 56,292 — — 56,292 Derivative assets 59,978 59,978 — 58,963 1,015 Community reinvestment investments 3,967 6,322 — 6,322 — Financial Liabilities: Deposits $ 13,897,739 $ 13,910,827 $ — $ 11,582,503 $ 2,328,324 Short-term borrowings 514,121 514,141 — 509,985 4,156 Long-term debt 694,788 665,

OPERATING SEGMENTS

OPERATING SEGMENTS	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
OPERATING SEGMENTS	OPERATING SEGMENTS We have three primary operating segments: Banking, Asset Management and the Holding Company. With respect to the Banking and Asset Management segments, each is delineated by the products and services that it offers. The Banking operating segment is comprised of commercial and personal banking services, including mortgage originations. Commercial banking services are primarily provided to corporations and other business clients and include a wide array of lending and cash management products. Personal banking services offered to individuals, professionals, and entrepreneurs include direct lending and depository services. The Asset Management segment includes certain activities of our PrivateWealth group, including investment management, personal trust and estate administration, custodial and escrow, retirement plans and brokerage services. The activities of the third operating segment, the Holding Company, include the direct and indirect ownership of our banking subsidiary, the issuance of debt and intersegment eliminations. The accounting policies of the individual operating segments are the same as those of the Company as described in Note 1 , "Summary of Significant Accounting Policies," to the "Notes to Consolidated Financial Statements" of our Annual Report on Form 10-K for the fiscal year ended December 31, 2014 . Transactions between operating segments are primarily conducted at fair value, resulting in profits that are eliminated from consolidated results of operations. Financial results for each segment are presented below. For segment reporting purposes, the statement of financial condition of Asset Management is included with the Banking segment. Operating Segments Performance (Amounts in thousands) Three Months Ended September 30, Banking Asset Management Holding Company and Other Adjustments Consolidated 2015 2014 2015 2014 2015 2014 2015 2014 Net interest income (loss) $ 135,733 $ 123,208 $ 1,142 $ 781 $ (5,666 ) $ (7,231 ) $ 131,209 $ 116,758 Provision for loan and covered loan losses 4,197 3,890 — — — — 4,197 3,890 Non-interest income 26,311 26,414 4,462 4,240 16 15 30,789 30,669 Non-interest expense 78,274 71,194 4,063 4,108 2,838 2,534 85,175 77,836 Income (loss) before taxes 79,573 74,538 1,541 913 (8,488 ) (9,750 ) 72,626 65,701 Income tax provision (benefit) 29,806 28,432 599 359 (3,047 ) (3,617 ) 27,358 25,174 Net income (loss) $ 49,767 $ 46,106 $ 942 $ 554 $ (5,441 ) $ (6,133 ) $ 45,268 $ 40,527 Nine Months Ended September 30, Banking Asset Management Holding Company Consolidated 2015 2014 2015 2014 2015 2014 2015 2014 Net interest income (loss) $ 391,352 $ 357,115 $ 3,145 $ 2,555 $ (16,673 ) $ (21,809 ) $ 377,824 $ 337,861 Provision for loan and covered loan losses 11,959 7,924 — — — — 11,959 7,924 Non-interest income 83,722 74,090 13,596 13,029 46 45 97,364 87,164 Non-interest expense 228,965 208,374 12,888 12,516 8,364 8,161 250,217 229,051 Income (loss) before taxes 234,150 214,907 3,853 3,068 (24,991 ) (29,925 ) 213,012 188,050 Income tax provision (benefit) 87,694 82,415 1,497 1,208 (9,353 ) (11,429 ) 79,838 72,194 Net income (loss) $ 146,456 $ 132,492 $ 2,356 $ 1,860 $ (15,638 ) $ (18,496 ) $ 133,174 $ 115,856 Banking Holding Company and Other Adjustments (1) Consolidated 9/30/2015 12/31/2014 9/30/2015 12/31/2014 9/30/2015 12/31/2014 Selected Balances Assets $ 15,003,875 $ 13,882,805 $ 1,890,730 $ 1,720,577 $ 16,894,605 $ 15,603,382 Total loans 13,079,314 11,892,219 — — 13,079,314 11,892,219 Deposits, excluding deposits held-for-sale 13,955,153 13,150,600 (57,414 ) (60,632 ) 13,897,739 13,089,968 (1) Deposit amounts represent the elimination of Holding Company cash accounts included in total deposits of the Banking segment.

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
VARIABLE INTEREST ENTITIES	VARIABLE INTEREST ENTITIES At September 30, 2015 , and December 31, 2014 , the Company did not have any variable interest entities ("VIEs") consolidated in its financial statements. The table below presents our interests in VIEs that are not consolidated in our financial statements. Nonconsolidated VIEs (Amounts in thousands) September 30, 2015 December 31, 2014 Carrying Amount Maximum Exposure to Loss Carrying Amount Maximum Exposure to Loss Trust preferred capital securities issuances $ 169,788 $ — $ 169,788 $ — Community reinvestment investments 21,809 35,682 14,360 16,054 Restructured loans to commercial clients (1) : Outstanding loan balance 43,139 52,017 49,376 57,782 Related derivative asset 13 13 6,533 6,533 Total $ 234,749 $ 87,712 $ 240,057 $ 80,369 (1) Excludes personal loans and loans to non-for-profit entities. Trust preferred capital securities issuances – As discussed in Note 9 , we sponsor and wholly own 100% of the common equity of four trusts that were formed for the purpose of issuing trust preferred securities to third-party investors and investing the proceeds from the sale of the trust preferred securities solely in debentures issued by the Company. The trusts’ only assets are the principal balance of the Debentures and the related interest receivable, which are included within long-term debt in our Consolidated Statements of Financial Condition. The Company is not the primary beneficiary of the trusts and accordingly, the trusts are not consolidated in our financial statements. Community reinvestment investments – We hold certain investments in funds that make investments to further our community reinvestment initiatives. Such investments are included within other assets in our Consolidated Statements of Financial Condition. Certain of these investments meet the definition of a VIE, but the Company is not the primary beneficiary as we are a limited investor in those investment funds and do not have the power to direct their investment activities. Accordingly, we will continue to account for our interests in these investments on an unconsolidated basis. Our maximum exposure to loss is limited to the carrying amount plus additional required future capital contributions. A portion of our community reinvestment investments are investments in limited liability entities that invest in affordable housing projects that qualify for low-income housing tax credits. These investments entitle the Company to tax credits through 2028 . Any new investments in qualified affordable housing projects entered into on or after January 1, 2014, that meet certain conditions are accounted for using the proportional amortization method. Prior to January 1, 2014, the Company accounted for all of its investments in qualified affordable housing projects using the effective yield method and has elected to continue accounting for preexisting tax credit investments using the effective yield method as permitted under the accounting standards. The carrying value of the Company’s tax credit investments in affordable housing projects totaled $19.2 million and $10.0 million as of September 30, 2015 , and December 31, 2014 , respectively. The Company recognizes tax credits related to these investments, which totaled $470,000 and $328,000 for the nine months ended September 30, 2015 and 2014 , respectively. The Company also recognizes tax benefits from the operating losses generated by these investments, which totaled $175,000 and $138,000 for the nine months ended September 30, 2015 and 2014 , respectively. The amortization of the principal investment balances for the nine months ended September 30, 2015 and 2014 totaled $481,000 and $354,000 , respectively. Commitments to provide future capital contributions totaling $17.2 million as of September 30, 2015 , are expected to be paid through 2030 . These investments are reviewed periodically for impairment. No impairment losses were recorded for the nine months ended September 30, 2015 and 2014 . Restructured loans – For certain troubled commercial loans, we restructure the terms of the borrower’s debt in an effort to increase the probability of collecting amounts contractually due. Following a restructuring, the borrower entity typically meets the definition of a VIE, and economic events have proven that the entity’s equity is not sufficient to permit it to finance its activities without additional subordinated financial support or a restructuring of the terms of its financing. As we do not have the power to direct the activities that most significantly impact such troubled commercial borrowers’ operations, we are not considered the primary beneficiary even in situations where, based on the size of the financing provided, we are exposed to potentially significant benefits and losses of the borrowing entity. We have no contractual requirements to provide financial support to the borrowing entities beyond certain funding commitments established upon restructuring of the terms of the debt. Our interests in the troubled commercial borrowers include outstanding loans and related derivative assets. Our maximum exposure to loss is limited to these interests plus any additional future funding commitments.

SECURITIES (Tables)

SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Securities Portfolio	Securities Portfolio (Amounts in thousands) September 30, 2015 December 31, 2014 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. Treasury $ 268,078 $ 1,702 $ (46 ) $ 269,734 $ 269,697 $ 120 $ (1,552 ) $ 268,265 U.S. Agency 46,619 116 — 46,735 46,959 — (701 ) 46,258 Collateralized mortgage obligations 104,380 4,037 (32 ) 108,385 132,633 4,334 (34 ) 136,933 Residential mortgage-backed securities 804,524 22,240 (1,169 ) 825,595 822,746 25,058 (1,726 ) 846,078 State and municipal securities 445,387 8,656 (566 ) 453,477 340,810 7,222 (722 ) 347,310 Foreign sovereign debt — — — — 500 — — 500 Total $ 1,668,988 $ 36,751 $ (1,813 ) $ 1,703,926 $ 1,613,345 $ 36,734 $ (4,735 ) $ 1,645,344 Securities Held-to-Maturity Collateralized mortgage obligations $ 53,336 $ — $ (1,179 ) $ 52,157 $ 59,960 $ — $ (2,017 ) $ 57,943 Residential mortgage-backed securities 1,017,011 12,187 (1,290 ) 1,027,908 885,235 9,410 (2,483 ) 892,162 Commercial mortgage-backed securities 218,164 2,292 (416 ) 220,040 183,021 592 (2,176 ) 181,437 State and municipal securities 369 4 — 373 1,069 4 — 1,073 Other securities 4,553 — (554 ) 3,999 — — — — Total $ 1,293,433 $ 14,483 $ (3,439 ) $ 1,304,477 $ 1,129,285 $ 10,006 $ (6,676 ) $ 1,132,615
Securities in Unrealized Loss Position	Securities in Unrealized Loss Position (Amounts in thousands) Less Than 12 Months 12 Months or Longer Total Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses As of September 30, 2015 Securities Available-for-Sale U.S. Treasury — $ — $ — 1 $ 26,065 $ (46 ) $ 26,065 $ (46 ) Collateralized mortgage obligations 3 4,993 (32 ) — — — 4,993 (32 ) Residential mortgage-backed securities 7 40,475 (141 ) 5 79,959 (1,028 ) 120,434 (1,169 ) State and municipal securities 147 70,560 (529 ) 13 4,154 (37 ) 74,714 (566 ) Total $ 116,028 $ (702 ) $ 110,178 $ (1,111 ) $ 226,206 $ (1,813 ) Securities Held-to-Maturity Collateralized mortgage obligations — $ — $ — 4 $ 52,157 $ (1,179 ) $ 52,157 $ (1,179 ) Residential mortgage-backed securities 14 140,406 (542 ) 10 59,947 (748 ) 200,353 (1,290 ) Commercial mortgage-backed securities 8 31,292 (238 ) 12 38,819 (178 ) 70,111 (416 ) Other securities 1 3,999 (554 ) — — — 3,999 (554 ) Total $ 175,697 $ (1,334 ) $ 150,923 $ (2,105 ) $ 326,620 $ (3,439 ) As of December 31, 2014 Securities Available-for-Sale U.S. Treasury 5 $ 119,233 $ (159 ) 5 $ 123,117 $ (1,393 ) $ 242,350 $ (1,552 ) U.S. Agency — — — 3 46,258 (701 ) 46,258 (701 ) Collateralized mortgage obligations 2 4,565 (34 ) — — — 4,565 (34 ) Residential mortgage-backed securities — — — 4 89,085 (1,726 ) 89,085 (1,726 ) State and municipal securities 116 53,092 (249 ) 58 32,152 (473 ) 85,244 (722 ) Total $ 176,890 $ (442 ) $ 290,612 $ (4,293 ) $ 467,502 $ (4,735 ) Securities Held-to-Maturity Collateralized mortgage obligations — $ — $ — 4 $ 57,943 $ (2,017 ) $ 57,943 $ (2,017 ) Residential mortgage-backed securities 6 45,867 (38 ) 18 162,564 (2,445 ) 208,431 (2,483 ) Commercial mortgage-backed securities 4 10,021 (28 ) 27 105,709 (2,148 ) 115,730 (2,176 ) Total $ 55,888 $ (66 ) $ 326,216 $ (6,610 ) $ 382,104 $ (6,676 )
Remaining Contractual Maturity of Securities	Remaining Contractual Maturity of Securities (Amounts in thousands) September 30, 2015 Available-For-Sale Securities Held-To-Maturity Securities Amortized Cost Fair Value Amortized Cost Fair Value U.S. Treasury, U.S. Agency, state and municipal and other securities: One year or less $ 9,871 $ 9,973 $ 116 $ 116 One year to five years 458,502 463,853 253 257 Five years to ten years 267,129 271,218 4,553 3,999 After ten years 24,582 24,902 — — All other securities: Collateralized mortgage obligations 104,380 108,385 53,336 52,157 Residential mortgage-backed securities 804,524 825,595 1,017,011 1,027,908 Commercial mortgage-backed securities — — 218,164 220,040 Total $ 1,668,988 $ 1,703,926 $ 1,293,433 $ 1,304,477
Securities Gains (Losses)	Securities Gains (Losses) (Amounts in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Proceeds from sales $ 26,967 $ 1,041 $ 57,313 $ 74,690 Gross realized gains $ 385 $ 5 $ 942 $ 615 Gross realized losses (1) (125 ) (2 ) (149 ) (85 ) Net realized gains $ 260 $ 3 $ 793 $ 530 Income tax provision on net realized gains $ 98 $ 1 $ 308 $ 209 (1) Includes OTTI of $125,000 for the three and nine months ended September 30, 2015, and is reported in the Consolidated Statement of Income within net security gains.

LOANS AND CREDIT QUALITY (Table

LOANS AND CREDIT QUALITY (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Loan Portfolio	Loan Portfolio (Amounts in thousands) September 30, December 31, Commercial and industrial $ 6,654,268 $ 5,996,070 Commercial - owner-occupied CRE 2,017,733 1,892,564 Total commercial 8,672,001 7,888,634 Commercial real estate 2,545,143 2,323,616 Commercial real estate - multi-family 704,195 593,103 Total commercial real estate 3,249,338 2,916,719 Construction 412,688 381,102 Residential real estate 439,005 361,565 Home equity 133,122 142,177 Personal 173,160 202,022 Total loans $ 13,079,314 $ 11,892,219 Net deferred loan fees and unamortized discount and premium on loans, included as a reduction in total loans $ 43,330 $ 47,017 Overdrawn demand deposits included in total loans $ 2,936 $ 1,963
Loans Held-for-sale	Loans Held-For-Sale (Amounts in thousands) September 30, December 31, Mortgage loans held-for-sale (1) $ 24,065 $ 42,215 Other loans held-for-sale (2) 52,160 72,946 Total loans held-for-sale $ 76,225 $ 115,161 (1) Comprised of residential mortgage loan originations intended to be sold in the secondary market. The Company accounts for these loans under the fair value option. Refer to Note 16 for additional information regarding mortgage loans held-for-sale. (2) Amounts at September 30, 2015 , represent commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value. Generally, the Company intends to sell these loans within 30-60 days from the date the intent to sell was established. Amounts at December 31, 2014 , consist of $36.6 million of commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value and $36.3 million of commercial, commercial real estate, construction, home equity and personal loans held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015.
Carrying Value of Loans Pledged	Carrying Value of Loans Pledged (Amounts in thousands) September 30, December 31, Loans pledged to secure outstanding borrowings or availability: FRB discount window borrowings (1) $ 416,573 $ 478,692 FHLB advances (2) 4,550,246 1,576,168 Total $ 4,966,819 $ 2,054,860 (1) No borrowings were outstanding at September 30, 2015 and December 31, 2014 . (2) Refer to Notes 7 and 8 for additional information regarding FHLB advances.
Loan Portfolio Aging	Loan Portfolio Aging (Amounts in thousands) Delinquent Current 30 – 59 Days Past Due 60 – 89 Days Past Due 90 Days Past Due and Accruing Total Accruing Loans Nonaccrual Total Loans As of September 30, 2015 Commercial $ 8,649,998 $ 632 $ 3,001 $ — $ 8,653,631 $ 18,370 $ 8,672,001 Commercial real estate 3,236,785 351 161 — 3,237,297 12,041 3,249,338 Construction 412,688 — — — 412,688 — 412,688 Residential real estate 434,173 — 560 — 434,733 4,272 439,005 Home equity 123,278 321 250 — 123,849 9,273 133,122 Personal 171,990 932 212 — 173,134 26 173,160 Total loans $ 13,028,912 $ 2,236 $ 4,184 $ — $ 13,035,332 $ 43,982 $ 13,079,314 As of December 31, 2014 Commercial $ 7,855,833 $ 762 $ 992 $ — $ 7,857,587 $ 31,047 $ 7,888,634 Commercial real estate 2,891,301 5,408 261 — 2,896,970 19,749 2,916,719 Construction 380,939 163 — — 381,102 — 381,102 Residential real estate 354,717 943 631 — 356,291 5,274 361,565 Home equity 128,500 397 2,236 — 131,133 11,044 142,177 Personal 201,569 23 — — 201,592 430 202,022 Total loans $ 11,812,859 $ 7,696 $ 4,120 $ — $ 11,824,675 $ 67,544 $ 11,892,219	[1]
Impaired Loans	Impaired Loans (Amounts in thousands) Unpaid Contractual Principal Balance Recorded Investment With No Specific Reserve Recorded Investment With Specific Reserve Total Recorded Investment Specific Reserve As of September 30, 2015 Commercial $ 50,150 $ 30,841 $ 11,125 $ 41,966 $ 5,468 Commercial real estate 18,524 3,289 8,752 12,041 1,465 Residential real estate 4,459 — 4,272 4,272 558 Home equity 11,979 4,263 7,111 11,374 1,575 Personal 26 — 26 26 6 Total impaired loans $ 85,138 $ 38,393 $ 31,286 $ 69,679 $ 9,072 As of December 31, 2014 Commercial $ 60,174 $ 25,739 $ 26,432 $ 52,171 $ 11,487 Commercial real estate 26,738 9,755 10,193 19,948 2,441 Residential real estate 5,849 349 4,925 5,274 735 Home equity 12,904 3,627 8,839 12,466 1,855 Personal 430 — 430 430 109 Total impaired loans $ 106,095 $ 39,470 $ 50,819 $ 90,289 $ 16,627
Average Recorded Investment And Interest Income Recognized On Impaired Loans	Average Recorded Investment and Interest Income Recognized on Impaired Loans (1) (Amounts in thousands) Three Months Ended September 30, 2015 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial $ 53,886 $ 287 $ 54,559 $ 428 Commercial real estate 12,656 — 23,841 16 Residential real estate 4,332 — 9,522 — Home equity 11,942 34 11,696 22 Personal 25 — 560 — Total $ 82,841 $ 321 $ 100,178 $ 466 (1) Represents amounts while classified as impaired for the periods presented. Average Recorded Investment and Interest Income Recognized on Impaired Loans (1) (Continued) (Amounts in thousands) Nine Months Ended September 30, 2015 2014 Average Interest Average Interest Commercial $ 54,331 $ 788 $ 49,593 $ 1,229 Commercial real estate 15,170 13 36,351 60 Residential real estate 4,594 — 9,665 — Home equity 12,653 79 12,628 67 Personal 217 — 609 — Total $ 86,965 $ 880 $ 108,846 $ 1,356 (1) Represents amounts while classified as impaired for the periods presented.	[1]
Credit Quality Indicators	Credit Quality Indicators (Dollars in thousands) Special Mention % of Portfolio Loan Type Potential Problem Loans % of Portfolio Loan Type Non- Performing Loans % of Portfolio Loan Type Total Loans As of September 30, 2015 Commercial $ 139,622 1.6 $ 116,345 1.3 $ 18,370 0.2 $ 8,672,001 Commercial real estate 77 * 2,687 0.1 12,041 0.4 3,249,338 Construction — — — — — — 412,688 Residential real estate 6,029 1.4 6,071 1.4 4,272 1.0 439,005 Home equity 487 0.4 2,696 2.0 9,273 7.0 133,122 Personal 612 0.4 151 0.1 26 * 173,160 Total $ 146,827 1.1 $ 127,950 1.0 $ 43,982 0.3 $ 13,079,314 As of December 31, 2014 Commercial $ 93,130 1.2 $ 78,562 1.0 $ 31,047 0.4 $ 7,888,634 Commercial real estate 3,552 0.1 746 * 19,749 0.7 2,916,719 Construction — — — — — — 381,102 Residential real estate 2,964 0.8 5,981 1.7 5,274 1.5 361,565 Home equity 1,170 0.8 2,108 1.5 11,044 7.8 142,177 Personal 173 0.1 45 * 430 0.2 202,022 Total $ 100,989 0.8 $ 87,442 0.7 $ 67,544 0.6 $ 11,892,219 * Less than 0.1%	[1]
Troubled Debt Restructured Loans Outstanding	Troubled Debt Restructured Loans Outstanding (Amounts in thousands) September 30, 2015 December 31, 2014 Accruing Nonaccrual (1) Accruing Nonaccrual (1) Commercial $ 23,596 $ 10,674 $ 21,124 $ 20,113 Commercial real estate — 9,397 199 8,005 Residential real estate — 1,308 — 1,881 Home equity 2,101 5,402 1,422 5,886 Personal — — — 413 Total $ 25,697 $ 26,781 $ 22,745 $ 36,298 (1) Included in nonperforming loans.
Additions To TDR During The Period	Additions to Accruing Troubled Debt Restructurings During the Period (Dollars in thousands) Three Months Ended September 30, 2015 2014 Number of Borrowers Recorded Investment (1) Number of Borrowers Recorded Investment (1) Pre- Modification Post- Modification Pre- Modification Post- Modification Commercial Extension of maturity date (2) 2 $ 7,800 $ 7,800 1 $ 16,325 $ 16,325 Other concession (3) — — — 1 1,904 1,904 Total accruing 2 $ 7,800 $ 7,800 2 $ 18,229 $ 18,229 Nine Months Ended September 30, 2015 2014 Recorded Investment (1) Recorded Investment (1) Number of Borrowers Pre- Modification Post- Modification Number of Borrowers Pre- Modification Post- Modification Commercial Extension of maturity date (2) 7 $ 23,609 $ 23,328 3 $ 20,075 $ 20,075 Other concession (3) — — — 3 17,483 17,483 Total commercial 7 23,609 23,328 6 37,558 37,558 Commercial real estate Other concession (3) — — — 1 426 426 Home equity Extension of maturity date (2) 1 346 346 — — — Total accruing 8 $ 23,955 $ 23,674 7 $ 37,984 $ 37,984 Change in recorded investment due to principal paydown at time of modification $ 281 $ — (1) Represents amounts as of the date immediately prior to and immediately after the modification is effective. (2) Extension of maturity date also includes loans renewed at an existing rate of interest that is considered a below market rate for that particular loan’s risk profile. (3) Other concessions primarily include interest rate reductions, loan increases or deferrals of principal. Additions to Nonaccrual Troubled Debt Restructurings During the Period (Dollars in thousands) Three Months Ended September 30, 2015 2014 Number of Borrowers Recorded Investment (1) Number of Borrowers Recorded Investment (1) Pre- Modification Post- Modification Pre- Modification Post- Modification Commercial Extension of maturity date (2) 1 $ 19 $ 19 — $ — $ — Other concession (3) 1 4,473 4,473 4 17,046 17,046 Total commercial 2 4,492 4,492 4 17,046 17,046 Commercial real estate Other concession (3) — — — 1 653 686 Home equity Other concession (3) 2 276 276 1 544 607 Total nonaccrual 4 $ 4,768 $ 4,768 6 $ 18,243 $ 18,339 Nine Months Ended September 30, 2015 2014 Recorded Investment (1) Recorded Investment (1) Number of Pre- Post- Number of Pre- Post- Commercial Extension of maturity date (2) 5 $ 2,602 $ 2,602 — $ — $ — Other concession (3) 3 7,253 7,246 8 17,599 17,549 Total commercial 8 9,855 9,848 8 17,599 17,549 Commercial real estate Extension of maturity date (2) 2 1,747 1,660 — — — Other concession (3) 1 3,773 3,773 2 1,773 1,806 Total commercial real estate 3 5,520 5,433 2 1,773 1,806 Residential real estate Other concession (3) — — — 3 496 566 Home equity Extension of maturity date (2) 3 170 165 1 114 114 Other concession (3) 4 353 353 4 1,659 1,722 Total home equity 7 523 518 5 1,773 1,836 Total nonaccrual 18 $ 15,898 $ 15,799 18 $ 21,641 $ 21,757 Net decrease in recorded investment at time of modification $ 99 $ 50 (1) Represents amounts as of the date immediately prior to and immediately after the modification is effective. (2) Extension of maturity date also includes loans renewed at an existing rate of interest that is considered a below market rate for that particular loan’s risk profile. (3) Other concessions primarily include interest rate reductions, loan increases or deferrals of principal.
OREO Composition	OREO Composition (Amounts in thousands) September 30, 2015 December 31, 2014 Single-family homes $ 6,354 $ 7,902 Land parcels 2,664 4,237 Multi-family 598 488 Office/industrial 1,799 3,832 Retail 1,345 957 Total OREO properties $ 12,760 $ 17,416
Covered Assets	Covered Assets (Amounts in thousands) September 30, 2015 December 31, 2014 Residential mortgage loans (1) $ 26,526 $ 32,182 Foreclosed real estate - single family homes — 187 Estimated loss reimbursement by the FDIC 2,033 1,763 Total covered assets 28,559 34,132 Allowance for covered loan losses (6,337 ) (5,191 ) Net covered assets $ 22,222 $ 28,941 (1) Includes $262,000 and $420,000 of purchased credit-impaired loans as of September 30, 2015 , and December 31, 2014 , respectively.
[1]	Extension of maturity date also includes loans renewed at an existing rate of interest that is considered a below market rate for that particular loan’s risk profile.

ALLOWANCE FOR LOAN LOSSES AND28

ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR UNFUNDED COMMITMENTS (Tables)	9 Months Ended
	Sep. 30, 2015	[1]
Text Block [Abstract]
Allowance For Loan Losses and Recorded Investment in Loans	Allowance for Loan Losses and Recorded Investment in Loans (Amounts in thousands) Three Months Ended September 30, 2015 Commercial Commercial Real Estate Construction Residential Real Estate Home Equity Personal Total Allowance for Loan Losses: Balance at beginning of period $ 113,144 $ 28,210 $ 3,816 $ 5,257 $ 4,615 $ 2,009 $ 157,051 Loans charged-off (661 ) (175 ) — (97 ) (85 ) (6 ) (1,024 ) Recoveries on loans previously charged-off 2,115 134 10 198 50 131 2,638 Net recoveries (charge-offs) 1,454 (41 ) 10 101 (35 ) 125 1,614 Provision (release) for loan losses 6,413 (1,868 ) 571 (1,028 ) (292 ) 407 4,203 Balance at end of period $ 121,011 $ 26,301 $ 4,397 $ 4,330 $ 4,288 $ 2,541 $ 162,868 Ending balance for loans individually evaluated for impairment (1) $ 5,468 $ 1,465 $ — $ 558 $ 1,575 $ 6 $ 9,072 Ending balance for loans collectively evaluated for impairment $ 115,543 $ 24,836 $ 4,397 $ 3,772 $ 2,713 $ 2,535 $ 153,796 Recorded Investment in Loans: Ending balance, loans individually evaluated for impairment (1) $ 41,966 $ 12,041 $ — $ 4,272 $ 11,374 $ 26 $ 69,679 Ending balance, loans collectively evaluated for impairment 8,630,035 3,237,297 412,688 434,733 121,748 173,134 13,009,635 Total recorded investment in loans $ 8,672,001 $ 3,249,338 $ 412,688 $ 439,005 $ 133,122 $ 173,160 $ 13,079,314 (1) Refer to Note 4 for additional information regarding impaired loans. Allowance for Loan Losses and Recorded Investment in Loans (Continued) (Amounts in thousands) Three Months Ended September 30, 2014 Commercial Commercial Real Estate Construction Residential Real Estate Home Equity Personal Total Allowance for Loan Losses: Balance at beginning of period $ 96,326 $ 33,299 $ 3,621 $ 5,280 $ 5,015 $ 2,950 $ 146,491 Loans charged-off (227 ) (1,133 ) (7 ) (252 ) (172 ) (8 ) (1,799 ) Recoveries on loans previously charged-off 1,145 356 6 9 67 128 1,711 Net recoveries (charge-offs) 918 (777 ) (1 ) (243 ) (105 ) 120 (88 ) Provision (release) for loan losses 6,642 (2,135 ) 409 (25 ) (661 ) (498 ) 3,732 Balance at end of period $ 103,886 $ 30,387 $ 4,029 $ 5,012 $ 4,249 $ 2,572 $ 150,135 Ending balance for loans individually evaluated for impairment (1) $ 13,982 $ 3,223 $ — $ 497 $ 1,224 $ 55 $ 18,981 Ending balance for loans collectively evaluated for impairment $ 89,904 $ 27,164 $ 4,029 $ 4,515 $ 3,025 $ 2,517 $ 131,154 Recorded Investment in Loans: Ending balance, loans individually evaluated for impairment (1) $ 53,249 $ 19,886 $ — $ 9,723 $ 12,163 $ 544 $ 95,565 Ending balance, loans collectively evaluated for impairment 7,852,152 2,630,133 307,066 333,850 128,996 199,825 11,452,022 Total recorded investment in loans $ 7,905,401 $ 2,650,019 $ 307,066 $ 343,573 $ 141,159 $ 200,369 $ 11,547,587 (1) Refer to Note 4 for additional information regarding impaired loans. Allowance for Loan Losses (Amounts in thousands) Nine Months Ended September 30, Commercial Commercial Real Estate Construction Residential Real Estate Home Equity Personal Total 2015 Balance at beginning of year $ 103,462 $ 31,838 $ 4,290 $ 5,316 $ 4,924 $ 2,668 $ 152,498 Loans charged-off (5,784 ) (1,160 ) — (328 ) (456 ) (44 ) (7,772 ) Recoveries on loans previously charged-off 3,610 1,004 193 302 193 1,090 6,392 Net (charge-offs) recoveries (2,174 ) (156 ) 193 (26 ) (263 ) 1,046 (1,380 ) Provision (release) for loan losses 19,723 (5,381 ) (86 ) (960 ) (373 ) (1,173 ) 11,750 Balance at end of period $ 121,011 $ 26,301 $ 4,397 $ 4,330 $ 4,288 $ 2,541 $ 162,868
Reserve For Unfunded Commitments	Reserve for Unfunded Commitments (1) (Amounts in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Balance at beginning of period $ 13,157 $ 9,363 $ 12,274 $ 9,206 Provision for unfunded commitments 2,048 481 2,931 638 Recovery of unfunded commitments 4 — 4 — Balance at end of period $ 15,209 $ 9,844 $ 15,209 $ 9,844 Unfunded commitments, excluding covered assets, at period end $ 6,310,701 $ 5,365,042 (1) Unfunded commitments include commitments to extend credit, standby letters of credit and commercial letters of credit. Unfunded commitments related to covered assets are excluded as they are covered under a loss sharing agreement with the FDIC.
[1]	Refer to Note 4 for additional information regarding impaired loans.

GOODWILL AND OTHER INTANGIBLE29

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Carrying Amount of Goodwill By Operating Segment	Carrying Amount of Goodwill by Operating Segment (Amounts in thousands) September 30, December 31, 2014 Banking $ 81,755 $ 81,755 Asset management 12,286 12,286 Total goodwill $ 94,041 $ 94,041
Other Intangible Assets	Other Intangible Assets (Dollars in thousands) Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Core deposit intangibles: Gross carrying amount $ 18,093 $ 18,093 Accumulated amortization 14,603 12,870 Net carrying amount $ 3,490 $ 5,223 Amortization during the period $ 1,733 $ 2,799 Weighted average remaining life (in years) 2 2 Client relationships: Gross carrying amount $ 2,002 $ 2,002 Accumulated amortization 1,484 1,340 Net carrying amount $ 518 $ 662 Amortization during the period $ 144 $ 208 Weighted average remaining life (in years) 5 6
Scheduled Amortization of Other Intangible Assets	Scheduled Amortization of Other Intangible Assets (Amounts in thousands) Total Year ending December 31, 2015 - remaining three months $ 578 2016 2,161 2017 1,125 2018 98 2019 28 2020 and thereafter 18 Total $ 4,008

SHORT-TERM BORROWINGS (Tables)

SHORT-TERM BORROWINGS (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Summary Of Short-Term Borrowings	Summary of Short-Term Borrowings (Dollars in thousands) September 30, 2015 December 31, 2014 Amount Rate Amount Rate Outstanding: Repurchase agreements $ 57,965 0.40 % $ — — % FHLB advances 452,000 0.15 % 428,000 0.13 % Secured borrowings 4,156 4.10 % 4,385 4.45 % Total short-term borrowings $ 514,121 $ 432,385 Unused Availability: Federal funds (1) $ 630,500 $ 630,500 FRB discount window primary credit program (2) 363,590 403,752 FHLB advances (3) 1,506,937 265,529 Revolving line of credit 60,000 60,000 (1) Our total availability of overnight Federal fund ("Fed funds") borrowings is not a committed line of credit and is dependent upon lender availability. (2) Our borrowing capacity changes each quarter subject to available collateral and FRB discount factors. (3) As a member of the FHLB Chicago, the Bank has access to borrowing capacity which is subject to change based on the availability of acceptable collateral to pledge and the level of our investment in FHLB Chicago stock. At September 30, 2015 , our borrowing capacity was $2.4 billion , of which $1.5 billion is available, subject to making the required additional investment in FHLB Chicago stock. Qualifying residential, multi-family and commercial real estate loans, home equity lines of credit, and residential mortgage-backed securities are pledged as collateral to secure current outstanding balances and additional borrowing availability.

LONG-TERM DEBT Long-Term Debt (

LONG-TERM DEBT Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2015
Long-term Debt, Unclassified [Abstract]
Long-Term Debt [Table Text Block]	Long-Term Debt (Dollars in thousands) Rate Type Rate Maturity September 30, December 31, Parent Company: Junior Subordinated Debentures (1) Bloomfield Hills Statutory Trust I Floating, three-month LIBOR + 2.65% 2.98% 2034 $ 8,248 $ 8,248 PrivateBancorp Statutory Trust II Floating, three-month LIBOR + 1.71% 2.05% 2035 51,547 51,547 PrivateBancorp Statutory Trust III Floating, three-month LIBOR + 1.50% 1.84% 2035 41,238 41,238 PrivateBancorp Statutory Trust IV Fixed 10.00% 2068 68,755 68,755 Subordinated debt facility (2) Fixed 7.125% 2042 125,000 125,000 Subtotal 294,788 294,788 Subsidiaries: FHLB advances Floating, FHLBC overnight discount note index + 0.065% 0.10% 2017 350,000 — FHLB advances (3)(4) Fixed 3.58% - 4.68% 2019 50,000 50,000 Total long-term debt $ 694,788 $ 344,788 (1) Under the final regulatory capital rules issued in July 2013, these instruments are grandfathered for inclusion as a component of Tier 1 capital, although the Tier 1 capital treatment for these instruments could be subject to phase-out due to certain acquisitions. (2) Qualifies as Tier 2 capital for regulatory capital purposes. (3) Weighted average interest rate was 3.75% at September 30, 2015 and December 31, 2014 . (4) Amounts reported at September 30, 2015 and December 31, 2014 include three long-term advances totaling $45.0 million with a weighted average interest rate of 3.66% due in 2019. The advances provide for a one-time option, two years from issuance date, to increase the amount outstanding up to $150.0 million each at the same fixed rate as the original advance. The advances include a prepayment feature and are subject to a prepayment fee.
Scheduled Maturities of Long-Term Debt [Table Text Block]	Scheduled Maturities of Long-Term Debt (Amounts in thousands) Total Year ending December 31, 2017 $ 350,000 2019 50,000 2020 and thereafter 294,788 Total $ 694,788

JUNIOR SUBORDINATED DEFERRABL32

JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES HELD BY TRUSTS THAT ISSUED GUARANTEED CAPITAL DEBT SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Common Securities, Preferred Securities, And Related Debentures	Common Securities, Preferred Securities, and Related Debentures (Dollars in thousands) Common Securities Issued Trust Preferred Securities Issued (1) Principal Amount of Debentures (1) Issuance Date Coupon Rate (2) Maturity September 30, Bloomfield Hills Statutory Trust I May 2004 $ 248 $ 8,000 2.98 % June 2034 $ 8,248 PrivateBancorp Statutory Trust II June 2005 1,547 50,000 2.05 % Sept. 2035 51,547 PrivateBancorp Statutory Trust III Dec. 2005 1,238 40,000 1.84 % Dec. 2035 41,238 PrivateBancorp Capital Trust IV May 2008 5 68,750 10.00 % June 2068 68,755 Total $ 3,038 $ 166,750 $ 169,788 (1) The Trust Preferred Securities accrue distributions at a rate equal to the interest rate on, and have a maturity identical to that of, the related Debentures. The Trust Preferred Securities are subject to mandatory redemption, in whole or in part, upon repayment of the Debentures at maturity or upon their earlier redemption in whole or in part. The Debentures are redeemable in whole or in part prior to maturity at any time and only after we have obtained Federal Reserve approval, if then required under applicable guidelines or regulations. (2) Reflects the coupon rate in effect at September 30, 2015 . The coupon rate for Bloomfield Hills Statutory Trust I is a variable rate based on three-month LIBOR plus 2.65% . The coupon rates for PrivateBancorp Statutory Trusts II and III are at a variable rate based on three-month LIBOR plus 1.71% for Trust II and three-month LIBOR plus 1.50% for Trust III. The coupon rate for PrivateBancorp Capital Trust IV is fixed. Distributions on all Trust Preferred Securities are payable quarterly. We have the right to defer payment of interest on the Debentures at any time or from time to time for a period not exceeding ten years, in the case of the Debentures held by Trust IV, and five years, in the case of all other Debentures, without causing an event of default under the related indenture, provided no extension period may extend beyond the stated maturity of the Debentures. During such extension period, distributions on the trust preferred securities would also be deferred, and our ability to pay dividends on our common stock would generally be prohibited. The Federal Reserve has the ability to prevent interest payments on the Debentures.

EQUITY (Tables)

EQUITY (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Change in Accumulated Other Comprehensive Income by Component	Change in Accumulated Other Comprehensive Income ("AOCI") by Component (Amounts in thousands) Nine Months Ended September 30, 2015 2014 Unrealized Gain on Available-for-Sale Securities Accumulated (Loss) Gain on Effective Cash Flow Hedges Total Unrealized Gain on Available-for-Sale Securities Accumulated (Loss) Gain on Effective Cash Flow Hedges Total Balance at beginning of period $ 19,448 $ 1,469 $ 20,917 $ 12,960 $ (3,116 ) $ 9,844 Increase in unrealized gains on securities 3,857 — 3,857 8,133 — 8,133 Increase in unrealized gains on cash flow hedges — 18,387 18,387 — 9,710 9,710 Tax expense on increase in unrealized gains (1,536 ) (7,139 ) (8,675 ) (3,216 ) (3,815 ) (7,031 ) Other comprehensive income before reclassifications 2,321 11,248 13,569 4,917 5,895 10,812 Reclassification adjustment of net gains included in net income (1) (918 ) (7,643 ) (8,561 ) (530 ) (6,763 ) (7,293 ) Reclassification adjustment for tax expense on realized net gains (2) 356 2,968 3,324 209 2,664 2,873 Amounts reclassified from AOCI (562 ) (4,675 ) (5,237 ) (321 ) (4,099 ) (4,420 ) Net current period other comprehensive income 1,759 6,573 8,332 4,596 1,796 6,392 Balance at end of period $ 21,207 $ 8,042 $ 29,249 $ 17,556 $ (1,320 ) $ 16,236 (1) The amounts reclassified from AOCI for the available-for-sale securities are reported in net securities gains on the Consolidated Statements of Income, while the amounts reclassified from AOCI for cash flow hedges are reported in interest income on loans on the Consolidated Statements of Income. For the nine months ended September 30, 2015, $125,000 was reclassified out of AOCI related to OTTI on available-for-sale securities and included in the Consolidated Statement of Income within net securities gains. (2) The tax expense amounts reclassified from AOCI in connection with the available-for-sale securities reclassification and cash flow hedges reclassification are reported in income tax provision on the Consolidated Statements of Income.

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Basic and Diluted Earnings Per Common Share	Basic and Diluted Earnings per Common Share (Amounts in thousands, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Basic earnings per common share Net income $ 45,268 $ 40,527 $ 133,174 $ 115,856 Net income allocated to participating stockholders (1) (354 ) (515 ) (1,195 ) (1,666 ) Net income allocated to common stockholders $ 44,914 $ 40,012 $ 131,979 $ 114,190 Weighted-average common shares outstanding 78,144 77,110 77,834 76,951 Basic earnings per common share $ 0.58 $ 0.52 $ 1.70 $ 1.48 Diluted earnings per common share Diluted earnings applicable to common stockholders (2) $ 44,922 $ 40,017 $ 131,997 $ 114,206 Weighted-average diluted common shares outstanding: Weighted-average common shares outstanding 78,144 77,110 77,834 76,951 Dilutive effect of stock awards (3) 1,257 824 1,193 770 Weighted-average diluted common shares outstanding 79,401 77,934 79,027 77,721 Diluted earnings per common share $ 0.57 $ 0.51 $ 1.67 $ 1.47 (1) Participating stockholders are those that hold certain share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. Such shares or units are considered participating securities (i.e., certain of the Company’s deferred and restricted stock units and nonvested restricted stock awards). (2) Net income allocated to common stockholders for basic and diluted earnings per share may differ under the two-class method as a result of adding common stock equivalents for options to dilutive shares outstanding, which alters the ratio used to allocate earnings to common stockholders and participating securities for the purposes of calculating diluted earnings per share. (3) For the quarters ended September 30, 2015 and 2014 , the weighted-average outstanding non-participating securities of 240,000 and 1.3 million shares, respectively, and for the nine months ended September 30, 2015 and 2014 , the weighted-average outstanding non-participating securities of 401,000 and 1.3 million shares, respectively, were not included in the computation of diluted earnings per common share because their inclusion would have been antidilutive for the periods presented.

INCOME TAXES (Tables)

INCOME TAXES (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Income Tax Provision Analysis	Income Tax Provision Analysis (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Income before income taxes $ 72,626 $ 65,701 $ 213,012 $ 188,050 Income tax provision: Current income tax provision $ 32,897 $ 31,406 $ 83,128 $ 77,359 Deferred income benefit (5,539 ) (6,232 ) (3,290 ) (5,165 ) Total income tax provision $ 27,358 $ 25,174 $ 79,838 $ 72,194 Effective tax rate 37.7 % 38.3 % 37.5 % 38.4 %

DERIVATIVE INSTRUMENTS (Tables)

DERIVATIVE INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Notional Amounts and Fair Value of Derivative Instruments	Notional Amounts and Fair Value of Derivative Instruments (Amounts in thousands) Asset Derivatives Liability Derivatives September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 Notional (1) Fair Value Notional (1) Fair Value Notional (1) Fair Value Notional (1) Fair Value Derivatives designated as hedging instruments: Interest rate contracts $ 800,000 $ 12,451 $ 550,000 $ 4,542 $ — $ — $ 250,000 $ 2,715 Derivatives not designated as hedging instruments: Client-related derivatives: Interest rate contracts $ 3,900,911 $ 60,498 $ 3,881,202 $ 42,879 $ 3,820,911 $ 62,776 $ 3,743,827 $ 43,792 Foreign exchange contracts 176,060 4,741 98,285 5,183 162,394 3,958 86,582 4,659 Risk participation agreements (1) 86,318 15 98,478 19 121,377 52 100,941 24 Total client-related derivatives $ 65,254 $ 48,081 $ 66,786 $ 48,475 Other end-user derivatives: Foreign exchange contracts $ 18,754 $ 142 $ 18,551 $ 241 $ 5,098 $ 14 $ 2,892 $ 45 Mortgage banking derivatives 268 786 405 801 Total other end-user derivatives $ 410 $ 1,027 $ 419 $ 846 Total derivatives not designated as hedging instruments $ 65,664 $ 49,108 $ 67,205 $ 49,321 Netting adjustments (2) (18,137 ) (10,588 ) (45,238 ) (25,269 ) Total derivatives $ 59,978 $ 43,062 $ 21,967 $ 26,767 (1) The remaining average notional amounts are shown for risk participation agreements. (2) Represents netting of derivative asset and liability balances, and related cash collateral, with the same counterparty subject to master netting agreements. Refer to Note 14 for additional information regarding master netting agreements.
Derivatives Subject To Credit Risk Contingency Features	Derivatives Subject to Credit Risk Contingency Features (Amounts in thousands) September 30, December 31, Fair value of derivatives with credit contingency features in a net liability position $ 11,151 $ 14,596 Collateral posted for those transactions in a net liability position $ 12,922 $ 16,865 If credit risk contingency features were triggered: Additional collateral required to be posted to derivative counterparties $ — $ — Outstanding derivative instruments that would be immediately settled $ 11,151 $ 14,596
Change In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedge	Change in Accumulated Other Comprehensive Income Related to Interest Rate Swaps Designated as Cash Flow Hedge (Amounts in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Pre-tax After-tax Pre-tax After-tax Pre-Tax After-tax Pre-Tax After-tax Accumulated unrealized gain (loss) at beginning of period $ 5,459 $ 3,339 $ 2,461 $ 1,501 $ 2,405 $ 1,469 $ (5,110 ) $ (3,116 ) Amount of gain (loss) recognized in AOCI (effective portion) 10,261 6,276 (2,168 ) (1,333 ) 18,387 11,248 9,710 5,895 Amount reclassified from AOCI to interest income on loans (2,571 ) (1,573 ) (2,456 ) (1,488 ) (7,643 ) (4,675 ) (6,763 ) (4,099 ) Accumulated unrealized gain at end of period $ 13,149 $ 8,042 $ (2,163 ) $ (1,320 ) $ 13,149 $ 8,042 $ (2,163 ) $ (1,320 )
Risk Participation Agreements	Risk Participation Agreements (Dollars in thousands) September 30, December 31, Fair value of written RPAs $ 52 $ 24 Range of remaining terms to maturity (in years) Less than 1 to 5 Less than 1 to 4 Range of assigned internal risk ratings 2 to 7 2 to 7 Maximum potential amount of future undiscounted payments $ 3,142 $ 3,927 Percent of maximum potential amount of future undiscounted payments covered by proceeds from liquidation of pledged collateral 43 % 25 %
Gain (Loss) Recognized On Derivative Instruments Not Designated In Hedging Relationship	Gain (Loss) Recognized on Derivative Instruments Not Designated in Hedging Relationship (Amounts in thousands) Location in Consolidated Statement of Income Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Gain (loss) on client-related derivatives: Interest rate contracts Capital markets income $ 1,190 $ 1,626 $ 6,089 $ 6,644 Foreign exchange contracts Capital markets income 1,920 1,577 6,023 5,376 Risk participation agreements Capital markets income (12 ) 50 77 322 Total client-related derivatives 3,098 3,253 12,189 12,342 Gain (loss) on end-user derivatives: Foreign exchange derivatives Other income, service and charges income 558 1,028 1,108 776 Mortgage banking derivatives Mortgage banking income (466 ) 127 (125 ) (189 ) Total end-user derivatives 92 1,155 983 587 Total derivatives not designated in hedging relationship $ 3,190 $ 4,408 $ 13,172 $ 12,929

BALANCE SHEET OFFSETTING BALA37

BALANCE SHEET OFFSETTING BALANCE SHEET OFFSETTING (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Offsetting of Financial Assets and Liabilities	Offsetting of Financial Assets and Liabilities (Amounts in thousands) Gross Amounts of Recognized Assets / Liabilities Gross Amounts Offset (2) Net Amount Presented on the Statement of Financial Condition Gross Amounts Not Offset on the Statement of Financial Condition (3) Net Amount Financial Instruments (4) Cash Collateral As of September 30, 2015 Financial assets: Derivatives (1) : Interest rate contracts $ 72,949 $ (15,228 ) $ 57,721 $ — $ — $ 57,721 Foreign exchange contracts 3,337 (2,867 ) 470 — — 470 Risk participation agreements 15 — 15 — — 15 Mortgage banking derivatives 42 (42 ) — — — — Total derivatives subject to a master netting agreement 76,343 (18,137 ) 58,206 — — 58,206 Total derivatives not subject to a master netting agreement 1,772 — 1,772 — — 1,772 Total derivatives $ 78,115 $ (18,137 ) $ 59,978 $ — $ — $ 59,978 Financial liabilities: Derivatives (1) : Interest rate contracts $ 62,776 $ (43,023 ) $ 19,753 $ (14,725 ) $ — $ 5,028 Foreign exchange contracts 2,846 (2,173 ) 673 (502 ) — 171 Risk participation agreements 52 — 52 (39 ) — 13 Mortgage banking derivatives 170 (42 ) 128 — — 128 Total derivatives subject to a master netting agreement 65,844 (45,238 ) 20,606 (15,266 ) — 5,340 Total derivatives not subject to a master netting agreement 1,361 — 1,361 — — 1,361 Total derivatives 67,205 (45,238 ) 21,967 (15,266 ) — 6,701 Repurchase agreements 57,965 — 57,965 (57,965 ) — — Total $ 125,170 $ (45,238 ) $ 79,932 $ (73,231 ) $ — $ 6,701 (1) All derivative contracts are over-the-counter contracts. (2) Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement. (3) Collateralization is determined at the counterparty level. If overcollateralization exists, the amount shown is limited to the fair value of the financial instrument. (4) Financial instruments are disclosed at fair value. Financial instrument collateral is allocated pro-rata amongst the derivative liabilities to which it relates. Offsetting of Financial Assets and Liabilities (Continued) (Amounts in thousands) Gross Amounts of Recognized Assets / Liabilities Gross Amounts Offset (2) Net Amount Presented on the Statement of Financial Condition Gross Amounts Not Offset on the Statement of Financial Condition (3) Net Amount Financial Instruments (4) Cash Collateral As of December 31, 2014 Financial assets: Derivatives (1) : Interest rate contracts $ 47,421 $ (7,433 ) $ 39,988 $ — $ — $ 39,988 Foreign exchange contracts 3,664 (3,154 ) 510 — — 510 Risk participation agreements 19 (1 ) 18 — — 18 Total derivatives subject to a master netting agreement 51,104 (10,588 ) 40,516 — — 40,516 Total derivatives not subject to a master netting agreement 2,546 — 2,546 — — 2,546 Total derivatives $ 53,650 $ (10,588 ) $ 43,062 $ — $ — $ 43,062 Financial liabilities: Derivatives (1) : Interest rate contracts $ 46,507 $ (24,067 ) $ 22,440 $ (17,755 ) $ — $ 4,685 Foreign exchange contracts 2,421 (1,202 ) 1,219 (965 ) — 254 Risk participation agreements 24 — 24 (19 ) — 5 Total derivatives subject to a master netting agreement 48,952 (25,269 ) 23,683 (18,739 ) — 4,944 Total derivatives not subject to a master netting agreement 3,084 — 3,084 — — 3,084 Total derivatives $ 52,036 $ (25,269 ) $ 26,767 $ (18,739 ) $ — $ 8,028 (1) All derivative contracts are over-the-counter contracts. (2) Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement. (3) Collateralization is determined at the counterparty level. If overcollateralization exists, the amount shown is limited to the fair value of the financial instrument. (4) Financial instruments are disclosed at fair value. Financial instrument collateral is allocated pro-rata amongst the derivative liabilities to which it relates.

COMMITMENTS, GUARANTEES, AND 38

COMMITMENTS, GUARANTEES, AND CONTINGENT LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Contractual Or Notional Amounts Of Financial Instruments	Contractual or Notional Amounts of Financial Instruments (1) (Amounts in thousands) September 30, December 31, Commitments to extend credit: Home equity lines $ 135,799 $ 129,943 Residential 1-4 family construction 38,412 53,847 Commercial real estate, other construction, and land development 1,275,564 1,123,123 Commercial and industrial 3,948,742 4,031,217 All other commitments 505,226 336,623 Total commitments to extend credit $ 5,903,743 $ 5,674,753 Letters of credit: Financial standby $ 370,300 $ 334,175 Performance standby 40,067 38,167 Commercial letters of credit 6,160 5,224 Total letters of credit $ 416,527 $ 377,566 (1) Includes covered loan commitments of $9.6 million and $11.0 million as of September 30, 2015 , and December 31, 2014 , respectively.

ESTIMATED FAIR VALUE OF FINAN39

ESTIMATED FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Fair Value Measurements on a Recurring Basis	Fair Value Measurements on a Recurring Basis (Amounts in thousands) September 30, 2015 December 31, 2014 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets: Securities available-for sale: U.S. Treasury $ 269,734 $ — $ — $ 269,734 $ 268,265 $ — $ — $ 268,265 U.S. Agency — 46,735 — 46,735 — 46,258 — 46,258 Collateralized mortgage obligations — 108,385 — 108,385 — 136,933 — 136,933 Residential mortgage-backed securities — 825,595 — 825,595 — 846,078 — 846,078 State and municipal securities — 452,506 971 453,477 — 347,310 — 347,310 Foreign sovereign debt — — — — — 500 — 500 Total securities available-for-sale 269,734 1,433,221 971 1,703,926 268,265 1,377,079 — 1,645,344 Mortgage loans held-for-sale — 24,065 — 24,065 — 42,215 — 42,215 Derivative assets: Interest rate contract derivatives designated as hedging instruments — 12,451 — 12,451 — 4,542 — 4,542 Client-related derivatives — 64,335 919 65,254 — 46,669 1,412 48,081 Other end-user derivatives — 184 226 410 — 241 786 1,027 Netting adjustments — (18,007 ) (130 ) (18,137 ) — (9,952 ) (636 ) (10,588 ) Total derivative assets — 58,963 1,015 59,978 — 41,500 1,562 43,062 Total assets $ 269,734 $ 1,516,249 $ 1,986 $ 1,787,969 $ 268,265 $ 1,460,794 $ 1,562 $ 1,730,621 Liabilities: Derivative liabilities: Interest rate contract derivatives designated as hedging instruments $ — $ — $ — $ — $ — $ 2,715 $ — $ 2,715 Client-related derivatives — 66,609 177 66,786 — 47,799 676 48,475 Other end-user derivatives — 184 235 419 — 45 801 846 Netting adjustments — (45,113 ) (125 ) (45,238 ) — (24,633 ) (636 ) (25,269 ) Total derivative liabilities $ — $ 21,680 $ 287 $ 21,967 $ — $ 25,926 $ 841 $ 26,767
Reconciliation of Beginning and Ending Fair Value for Those Fair Value Measurements Using Significant Unobservable Inputs (Level 3)	Reconciliation of Beginning and Ending Fair Value for Those Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (1) (Amounts in thousands) Three Months Ended September 30, 2015 2014 Available- for-Sale Securities Derivative Assets Derivative (Liabilities) Derivative Assets Derivative (Liabilities) Balance at beginning of period $ — $ 1,081 $ (295 ) $ 2,712 $ (1,474 ) Total gains: Included in earnings (2) — 479 (406 ) (71 ) 216 Purchases, issuances, sales and settlements: Issuances — 297 — 84 — Settlements — (976 ) 289 (492 ) 387 Transfers into Level 3 (out of Level 2) (3) 971 265 — 56 — Transfers out of Level 3 (into Level 2) (3) — (1 ) — (335 ) 197 Balance at end of period $ 971 $ 1,145 $ (412 ) $ 1,954 $ (674 ) Change in unrealized gains in earnings relating to assets and liabilities still held at end of period $ — $ 176 $ 109 $ 30 $ 131 Nine Months Ended September 30 2015 2014 Available- for-Sale Securities Derivative Assets Derivative (Liabilities) Derivative Assets Derivative (Liabilities) Balance at beginning of period $ — $ 2,198 $ (1,477 ) $ 789 $ (201 ) Total gains: Included in earnings (2) — 237 (107 ) 155 759 Purchases, issuances, sales and settlements: Issuances — 802 — 496 — Settlements — (2,339 ) 873 (1,672 ) (35 ) Transfers into Level 3 (out of Level 2) (3) 971 1,433 (160 ) 2,635 (1,394 ) Transfers out of Level 3 (into Level 2) (3) — (1,186 ) 459 (449 ) 197 Balance at end of period $ 971 $ 1,145 $ (412 ) $ 1,954 $ (674 ) Change in unrealized gains in earnings relating to assets and liabilities still held at end of period $ — $ 429 $ 147 $ 127 $ 959 (1) Fair value is presented prior to giving effect to netting adjustments. (2) Amounts disclosed in this line are included in the Consolidated Statements of Income as capital markets products income for derivatives and mortgage banking income for interest rate lock commitments. (3) Transfers in and transfers out are recognized at the end of each quarterly reporting period. Investment securities transferred into Level 3 from Level 2 relate to a reclassification of certain municipal bonds. In general, derivative assets and liabilities are transferred into Level 3 from Level 2 due to a lack of observable market data, as there was deterioration in the credit risk of the derivative counterparty. Conversely, derivative assets and liabilities are transferred out of Level 3 into Level 2 due to an improvement in the credit risk of the derivative counterparty.
Difference Between Aggregate Fair Value And Aggregate Remaining Principal Balance for Mortgage Loans Held-For-Sale Elected to be Carried at Fair Value	Difference Between Aggregate Fair Value and Aggregate Remaining Principal Balance for Mortgage Loans Held-For-Sale Elected to be Carried at Fair Value (Amounts in thousands) September 30, December 31, Aggregate fair value $ 24,065 $ 42,215 Difference (1) (108 ) (16 ) Aggregate unpaid principal balance $ 23,957 $ 42,199 (1) The change in fair value is reflected in mortgage banking non-interest income.
Fair Value Measurements on a Nonrecurring Basis	Fair Value Measurements on a Nonrecurring Basis (Amounts in thousands) Fair Value Net Losses September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Collateral-dependent impaired loans (1) $ 20,317 $ 36,048 $ 1,398 $ 12,708 OREO (2) 8,423 11,704 1,666 4,750 Total $ 28,740 $ 47,752 $ 3,064 $ 17,458 (1) Represents the fair value of loans adjusted to the appraised value of the collateral with a write-down in fair value or change in specific reserves during the respective period. These fair value adjustments are recorded against the allowance for loan losses. (2) Represents the fair value of foreclosed properties that were adjusted subsequent to their initial classification as foreclosed assets. Write-downs are recognized as a component of net foreclosed property expenses in the Consolidated Statements of Income.
Quantitative Information Regarding Level 3 Fair Value Measurements	Quantitative Information Regarding Level 3 Fair Value Measurements (Dollars in thousands) Financial Instrument: Fair Value of Assets / (Liabilities) at September 30, 2015 Valuation Technique(s) Unobservable Input Range Weighted Average Investment securities $ 971 Bond pricing Equivalent rating Ba1-Aa3 N/A Watch list derivatives $ 780 Discounted cash flow Loss factors 7.5% to 17.3% 11.6 % Risk participation agreements $ (38 ) (1) Discounted cash flow Loss factors 1.0% to 17.3% 8.6 % Interest rate lock commitments $ 313 Discounted cash flow Pull-through rate 64.8% to 100.0% 81.2 % Collateral-dependent impaired loans $ 20,317 Sales comparison, Property specific -0.2% to -27.8% -8.4 % (2) OREO $ 8,423 Sales comparison, Property specific -1.0% to -18.8% -6.8 % (2) (1) Represents fair value of underlying swap. (2) Weighted average is calculated based on assets with a property specific adjustment.
Financial Instruments	Financial Instruments (Amounts in thousands) As of September 30, 2015 Carrying Amount Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 145,477 $ 145,477 $ 145,477 $ — $ — Federal funds sold and interest-bearing deposits in banks 231,600 231,600 — 231,600 — Loans held-for-sale 76,225 76,225 — 76,225 — Securities available-for-sale 1,703,926 1,703,926 269,734 1,433,221 971 Securities held-to-maturity 1,293,433 1,304,477 — 1,304,477 — FHLB stock 30,740 30,740 — 30,740 — Loans, net of allowance for loan losses and unearned fees 12,916,446 12,837,378 — — 12,837,378 Covered assets, net of allowance for covered loan losses 22,222 28,386 — — 28,386 Accrued interest receivable 43,064 43,064 — — 43,064 Investment in BOLI 56,292 56,292 — — 56,292 Derivative assets 59,978 59,978 — 58,963 1,015 Community reinvestment investments 3,967 6,322 — 6,322 — Financial Liabilities: Deposits $ 13,897,739 $ 13,910,827 $ — $ 11,582,503 $ 2,328,324 Short-term borrowings 514,121 514,141 — 509,985 4,156 Long-term debt 694,788 665,771 207,293 400,132 58,346 Accrued interest payable 6,509 6,509 — — 6,509 Derivative liabilities 21,967 21,967 — 21,680 287 Financial Instruments (Continued) (Amounts in thousands) As of December 31, 2014 Carrying Amount Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 132,211 $ 132,211 $ 132,211 $ — $ — Federal funds sold and interest-bearing deposits in banks 292,341 292,341 — 292,341 — Loans held-for-sale 115,161 115,161 — 115,161 — Securities available-for-sale 1,645,344 1,645,344 268,265 1,377,079 — Securities held-to-maturity 1,129,285 1,132,615 — 1,132,615 — FHLB stock 28,666 28,666 — 28,666 — Loans, net of allowance for loan losses and unearned fees 11,739,721 11,736,461 — — 11,736,461 Covered assets, net of allowance for covered loan losses 28,941 33,988 — — 33,988 Accrued interest receivable 40,531 40,531 — — 40,531 Investment in BOLI 55,207 55,207 — — 55,207 Derivative assets 43,062 43,062 — 41,500 1,562 Community reinvestment investments 4,854 6,060 — 6,060 — Financial Liabilities: Deposits $ 13,089,968 $ 13,095,657 $ — $ 10,595,040 $ 2,500,617 Deposits held-for-sale 122,216 117,572 — 117,572 — Short-term borrowings 432,385 430,944 — 427,150 3,794 Long-term debt 344,788 332,374 204,320 54,092 73,962 Accrued interest payable 6,948 6,948 — — 6,948 Derivative liabilities 26,767 26,767 — 25,926 841

OPERATING SEGMENTS (Tables)

OPERATING SEGMENTS (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Operating Segments Performance	Operating Segments Performance (Amounts in thousands) Three Months Ended September 30, Banking Asset Management Holding Company and Other Adjustments Consolidated 2015 2014 2015 2014 2015 2014 2015 2014 Net interest income (loss) $ 135,733 $ 123,208 $ 1,142 $ 781 $ (5,666 ) $ (7,231 ) $ 131,209 $ 116,758 Provision for loan and covered loan losses 4,197 3,890 — — — — 4,197 3,890 Non-interest income 26,311 26,414 4,462 4,240 16 15 30,789 30,669 Non-interest expense 78,274 71,194 4,063 4,108 2,838 2,534 85,175 77,836 Income (loss) before taxes 79,573 74,538 1,541 913 (8,488 ) (9,750 ) 72,626 65,701 Income tax provision (benefit) 29,806 28,432 599 359 (3,047 ) (3,617 ) 27,358 25,174 Net income (loss) $ 49,767 $ 46,106 $ 942 $ 554 $ (5,441 ) $ (6,133 ) $ 45,268 $ 40,527 Nine Months Ended September 30, Banking Asset Management Holding Company Consolidated 2015 2014 2015 2014 2015 2014 2015 2014 Net interest income (loss) $ 391,352 $ 357,115 $ 3,145 $ 2,555 $ (16,673 ) $ (21,809 ) $ 377,824 $ 337,861 Provision for loan and covered loan losses 11,959 7,924 — — — — 11,959 7,924 Non-interest income 83,722 74,090 13,596 13,029 46 45 97,364 87,164 Non-interest expense 228,965 208,374 12,888 12,516 8,364 8,161 250,217 229,051 Income (loss) before taxes 234,150 214,907 3,853 3,068 (24,991 ) (29,925 ) 213,012 188,050 Income tax provision (benefit) 87,694 82,415 1,497 1,208 (9,353 ) (11,429 ) 79,838 72,194 Net income (loss) $ 146,456 $ 132,492 $ 2,356 $ 1,860 $ (15,638 ) $ (18,496 ) $ 133,174 $ 115,856 Banking Holding Company and Other Adjustments (1) Consolidated 9/30/2015 12/31/2014 9/30/2015 12/31/2014 9/30/2015 12/31/2014 Selected Balances Assets $ 15,003,875 $ 13,882,805 $ 1,890,730 $ 1,720,577 $ 16,894,605 $ 15,603,382 Total loans 13,079,314 11,892,219 — — 13,079,314 11,892,219 Deposits, excluding deposits held-for-sale 13,955,153 13,150,600 (57,414 ) (60,632 ) 13,897,739 13,089,968 (1) Deposit amounts represent the elimination of Holding Company cash accounts included in total deposits of the Banking segment.

VARIABLE INTEREST ENTITIES (Tab

VARIABLE INTEREST ENTITIES (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Nonconsolidated Variable Interest Entities	Nonconsolidated VIEs (Amounts in thousands) September 30, 2015 December 31, 2014 Carrying Amount Maximum Exposure to Loss Carrying Amount Maximum Exposure to Loss Trust preferred capital securities issuances $ 169,788 $ — $ 169,788 $ — Community reinvestment investments 21,809 35,682 14,360 16,054 Restructured loans to commercial clients (1) : Outstanding loan balance 43,139 52,017 49,376 57,782 Related derivative asset 13 13 6,533 6,533 Total $ 234,749 $ 87,712 $ 240,057 $ 80,369 (1) Excludes personal loans and loans to non-for-profit entities.

Securities (Securities Portfoli

Securities (Securities Portfolio) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	$ 1,668,988	$ 1,613,345
Securities Available-for-Sale, Gross Unrealized Gains	36,751	36,734
Securities Available-for-Sale, Gross Unrealized Losses	(1,813)	(4,735)
Securities available-for-sale, at fair value	1,703,926	1,645,344
Securities Held-to-Maturity, Amortized Cost	1,293,433	1,129,285
Securities Held-to-Maturity, Gross Unrealized Gains	14,483	10,006
Securities Held-to-Maturity, Gross Unrealized Losses	(3,439)	(6,676)
Securities Held-to-Maturity, Fair Value	1,304,477	1,132,615
U.S. Treasury [Member]
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	268,078	269,697
Securities Available-for-Sale, Gross Unrealized Gains	1,702	120
Securities Available-for-Sale, Gross Unrealized Losses	(46)	(1,552)
Securities available-for-sale, at fair value	269,734	268,265
U.S. Agency [Member]
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	46,619	46,959
Securities Available-for-Sale, Gross Unrealized Gains	116	0
Securities Available-for-Sale, Gross Unrealized Losses	0	(701)
Securities available-for-sale, at fair value	46,735	46,258
Collateralized mortgage obligations [Member]
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	104,380	132,633
Securities Available-for-Sale, Gross Unrealized Gains	4,037	4,334
Securities Available-for-Sale, Gross Unrealized Losses	(32)	(34)
Securities available-for-sale, at fair value	108,385	136,933
Securities Held-to-Maturity, Amortized Cost	53,336	59,960
Securities Held-to-Maturity, Gross Unrealized Gains	0	0
Securities Held-to-Maturity, Gross Unrealized Losses	(1,179)	(2,017)
Securities Held-to-Maturity, Fair Value	52,157	57,943
Residential mortgage-backed securities [Member]
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	804,524	822,746
Securities Available-for-Sale, Gross Unrealized Gains	22,240	25,058
Securities Available-for-Sale, Gross Unrealized Losses	(1,169)	(1,726)
Securities available-for-sale, at fair value	825,595	846,078
Securities Held-to-Maturity, Amortized Cost	1,017,011	885,235
Securities Held-to-Maturity, Gross Unrealized Gains	12,187	9,410
Securities Held-to-Maturity, Gross Unrealized Losses	(1,290)	(2,483)
Securities Held-to-Maturity, Fair Value	1,027,908	892,162
Commercial mortgage-backed securities [Member]
Investment [Line Items]
Securities Held-to-Maturity, Amortized Cost	218,164	183,021
Securities Held-to-Maturity, Gross Unrealized Gains	2,292	592
Securities Held-to-Maturity, Gross Unrealized Losses	(416)	(2,176)
Securities Held-to-Maturity, Fair Value	220,040	181,437
State and municipal securities [Member]
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	445,387	340,810
Securities Available-for-Sale, Gross Unrealized Gains	8,656	7,222
Securities Available-for-Sale, Gross Unrealized Losses	(566)	(722)
Securities available-for-sale, at fair value	453,477	347,310
Securities Held-to-Maturity, Amortized Cost	369	1,069
Securities Held-to-Maturity, Gross Unrealized Gains	4	4
Securities Held-to-Maturity, Gross Unrealized Losses	0	0
Securities Held-to-Maturity, Fair Value	373	1,073
Foreign sovereign debt [Member]
Investment [Line Items]
Securities Available-for-Sale, Amortized Cost	0	500
Securities Available-for-Sale, Gross Unrealized Gains	0	0
Securities Available-for-Sale, Gross Unrealized Losses	0	0
Securities available-for-sale, at fair value	0	500
Other securities [Member]
Investment [Line Items]
Securities Held-to-Maturity, Amortized Cost	4,553	0
Securities Held-to-Maturity, Gross Unrealized Gains	0	0
Securities Held-to-Maturity, Gross Unrealized Losses	(554)	0
Securities Held-to-Maturity, Fair Value	$ 3,999	$ 0

Securities (Narrative) (Detail)

Securities (Narrative) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Disclosure Securities Narrative [Abstract]
Available-for-sale and held-to-maturity securities, pledged, carrying value	$ 481,900	$ 353,100
Securities pledged as collateral which may be sold or re-pledged by the secured party	157,200	86,500
Investments securities from one issuer that exceeds maximum percentage	$ 0	$ 0
Percentage of securities portfolio from one issuer, maximum	10.00%	10.00%
Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 261,100	$ 616,800
Securities, Continuous Unrealized Loss Position, 12 Months Or Longer, Aggregate Losses	3,200	10,900
Available for sale securities, amortized cost before other than temporary impairment	1,100
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	125
Non-marketable CRA qualified investments	$ 37,800	$ 21,600

Securities (Securities In Unrea

Securities (Securities In Unrealized Loss Position) (Detail) $ in Thousands	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Investment [Line Items]
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 116,028	$ 176,890
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	(702)	(442)
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	110,178	290,612
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Unrealized Losses	(1,111)	(4,293)
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Fair Value	226,206	467,502
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Unrealized Losses	(1,813)	(4,735)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	175,697	55,888
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1,334)	(66)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	150,923	326,216
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(2,105)	(6,610)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Fair Value	326,620	382,104
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Unrealized Losses	(3,439)	$ (6,676)
U.S. Treasury [Member]
Investment [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year		5
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	$ 119,233
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	$ 0	$ (159)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	1	5
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 26,065	$ 123,117
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Unrealized Losses	(46)	(1,393)
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Fair Value	26,065	242,350
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (46)	(1,552)
U.S. Agency [Member]
Investment [Line Items]
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		0
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses		$ 0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year		3
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		$ 46,258
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Unrealized Losses		(701)
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Fair Value		46,258
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Unrealized Losses		$ (701)
Collateralized mortgage obligations [Member]
Investment [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	3	2
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 4,993	$ 4,565
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	$ (32)	$ (34)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	0	0
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 0	$ 0
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Unrealized Losses	0	0
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Fair Value	4,993	4,565
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Unrealized Losses	(32)	(34)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	0
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	$ 0	$ 0
Held to Maturity Securities in Unrealized Loss Positions Qualitative Disclosure Number of Positions Greater than or equal to One Year	4	4
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 52,157	$ 57,943
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(1,179)	(2,017)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Fair Value	52,157	57,943
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,179)	(2,017)
Residential mortgage-backed securities [Member]
Investment [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	7
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 40,475	0
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	$ (141)	$ 0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	5	4
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 79,959	$ 89,085
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Unrealized Losses	(1,028)	(1,726)
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Fair Value	120,434	89,085
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,169)	$ (1,726)
Held to maturity securities in unrealized loss positions qualitative disclosure number of positions less than one year	14	6
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 140,406	$ 45,867
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	$ (542)	$ (38)
Held to Maturity Securities in Unrealized Loss Positions Qualitative Disclosure Number of Positions Greater than or equal to One Year	10	18
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 59,947	$ 162,564
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(748)	(2,445)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Fair Value	200,353	208,431
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (1,290)	$ (2,483)
Commercial mortgage-backed securities [Member]
Investment [Line Items]
Held to maturity securities in unrealized loss positions qualitative disclosure number of positions less than one year	8	4
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 31,292	$ 10,021
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	$ (238)	$ (28)
Held to Maturity Securities in Unrealized Loss Positions Qualitative Disclosure Number of Positions Greater than or equal to One Year	12	27
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 38,819	$ 105,709
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(178)	(2,148)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Fair Value	70,111	115,730
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (416)	$ (2,176)
State and municipal securities [Member]
Investment [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	147	116
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 70,560	$ 53,092
Securities Available-for-Sale, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	$ (529)	$ (249)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	13	58
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	$ 4,154	$ 32,152
Securities Available-for-Sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Unrealized Losses	(37)	(473)
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Fair Value	74,714	85,244
Securities Available-for-Sale, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (566)	$ (722)
Other securities [Member]
Investment [Line Items]
Held to maturity securities in unrealized loss positions qualitative disclosure number of positions less than one year	1
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 3,999
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(554)
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0
Securities Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	0
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Fair Value	3,999
Securities Held-to-Maturity, Continuous Unrealized Loss Position, Total Unrealized Losses	$ (554)

Securities (Remaining Contractu

Securities (Remaining Contractual Maturity Of Securities) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Available-For-Sale Securities, Amortized Cost	$ 1,668,988	$ 1,613,345
Securities available-for-sale, at fair value	1,703,926	1,645,344
Securities Held-to-Maturity, Amortized Cost	1,293,433	1,129,285
Securities Held-to-Maturity, Fair Value	1,304,477	1,132,615
U.S. Treasury, U.S. Agency, state and municipal and other securities [Member]
Investment [Line Items]
Available-For-Sale Securities, One year or less, Amortized Cost	9,871
Available-For-Sale Securities, One year to five years, Amortized Cost	458,502
Available-For-Sale Securities, Five years to ten years, Amortized Cost	267,129
Available-For-Sale Securities, After ten years, Amortized Cost	24,582
Available-For-Sale Securities, One year or less, Fair Value	9,973
Available-For-Sale Securities, One year to five years, Fair Value	463,853
Available-For-Sale Securities, Five years to ten years, Fair Value	271,218
Available-For-Sale Securities, After ten years, Fair value	24,902
Held-to-Maturity Securities, One year or less, Amortized Cost	116
Held-to-Maturity Securities, One year to five years, Amortized Cost	253
Held-to-Maturity Securities, Five years to ten years, Amortized Cost	4,553
Held-to-Maturity Securities, After ten years, Amortized Cost	0
Held-to-Maturity Securities, One year or less, Fair Value	116
Held-to-Maturity Securities, One year to five years, Fair Value	257
Held-to-Maturity Securities, Five years to ten years, Fair Value	3,999
Held-to-Maturity Securities, After ten years, Fair Value	0
Collateralized mortgage obligations [Member]
Investment [Line Items]
Available-For-Sale Securities, All other securities, Without Single Maturity Date, Amortized Cost	104,380
Available-For-Sale Securities, Amortized Cost	104,380	132,633
Available-For-Sale Securities, All other securities, Without Single Maturity Date, Fair Value	108,385
Securities available-for-sale, at fair value	108,385	136,933
Held-to-Maturity Securities, All other securities, Without Single Maturity Date, Amortized Cost	53,336
Securities Held-to-Maturity, Amortized Cost	53,336	59,960
Held-to-Maturity Securities, All other securities, Without Single Maturity Date, Fair Value	52,157
Securities Held-to-Maturity, Fair Value	52,157	57,943
Residential mortgage-backed securities [Member]
Investment [Line Items]
Available-For-Sale Securities, All other securities, Without Single Maturity Date, Amortized Cost	804,524
Available-For-Sale Securities, Amortized Cost	804,524	822,746
Available-For-Sale Securities, All other securities, Without Single Maturity Date, Fair Value	825,595
Securities available-for-sale, at fair value	825,595	846,078
Held-to-Maturity Securities, All other securities, Without Single Maturity Date, Amortized Cost	1,017,011
Securities Held-to-Maturity, Amortized Cost	1,017,011	885,235
Held-to-Maturity Securities, All other securities, Without Single Maturity Date, Fair Value	1,027,908
Securities Held-to-Maturity, Fair Value	1,027,908	892,162
Commercial mortgage-backed securities [Member]
Investment [Line Items]
Available-For-Sale Securities, All other securities, Without Single Maturity Date, Amortized Cost	0
Available-For-Sale Securities, All other securities, Without Single Maturity Date, Fair Value	0
Held-to-Maturity Securities, All other securities, Without Single Maturity Date, Amortized Cost	218,164
Securities Held-to-Maturity, Amortized Cost	218,164	183,021
Held-to-Maturity Securities, All other securities, Without Single Maturity Date, Fair Value	220,040
Securities Held-to-Maturity, Fair Value	$ 220,040	$ 181,437

Securities (Securities Gains (L

Securities (Securities Gains (Losses)) (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Gain (Loss) on Investments [Line Items]
Proceeds from sales	$ 26,967		$ 1,041	$ 57,313		$ 74,690
Gross realized gains	385		5	942		615
Gross realized losses	(125)	[1]	(2)	(149)	[1]	(85)
Net realized gains (losses)	260		3	793		530
Income tax provision (benefit) on net realized gains (losses)	$ 98		$ 1	$ 308		$ 209
[1]	Includes OTTI of $125,000 for the three and nine months ended September 30, 2015, and is reported in the Consolidated Statement of Income within net security gains.

Loans and Credit Quality (Loan

Loans and Credit Quality (Loan Portfolio) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Loans [Line Items]
Commercial and industrial	$ 6,654,268	$ 5,996,070
Commercial - owner-occupied CRE	2,017,733	1,892,564
Total commercial	8,672,001	7,888,634
Commercial real estate	2,545,143	2,323,616
Commercial real estate - multi-family	704,195	593,103
Total Commercial real estate	3,249,338	2,916,719
Construction	412,688	381,102
Residential real estate	439,005	361,565
Home equity	133,122	142,177
Personal	173,160	202,022
Total loans	13,079,314	11,892,219	$ 11,547,587
Net deferred loan fees and unamortized discount and premium on loans, included as a reduction in total loans	43,330	47,017
Overdrawn demand deposits included in total loans	$ 2,936	$ 1,963

LOANS AND CREDIT QUALITY Loans

LOANS AND CREDIT QUALITY Loans and Credit Quality (Loans Held-For-Sale) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Loans Held-for-Sale [Abstract]
Mortgage loans held-for-sale	[1]	$ 24,065	$ 42,215
Other loans held-for-sale	[2]	52,160	72,946
Total loans held-for-sale		$ 76,225	$ 115,161
[1]	Comprised of residential mortgage loan originations intended to be sold in the secondary market. The Company accounts for these loans under the fair value option. Refer to Note 16 for additional information regarding mortgage loans held-for-sale.
[2]	Amounts at September 30, 2015, represent commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value. Generally, the Company intends to sell these loans within 30-60 days from the date the intent to sell was established. Amounts at December 31, 2014, consist of $36.6 million of commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value and $36.3 million of commercial, commercial real estate, construction, home equity and personal loans held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015.

Loans and Credit Quality (Narra

Loans and Credit Quality (Narrative) (Detail)		9 Months Ended
		Sep. 30, 2015USD ($)risk_rating	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Loans [Line Items]
Loans Held-for-sale, Other	[1]	$ 52,160,000		$ 72,946,000
Loans and leases receivable, impaired, commitment to lend		10,200,000		8,500,000
Specific reserves on nonaccrual troubled debt restructurings		4,900,000		10,600,000
Specific reserves on accruing troubled debt restructurings		14,000		0
OREO Recorded Investment of Consumer Mortgage Loans Secured by Residential Real Estate Properties For Which Foreclosure Proceedings Are In Process		5,100,000		5,500,000
Covered Assets Recorded Investment of Properties For Which Foreclosure Proceedings Are In Process		531,000		856,000
Commercial real estate [Member]
Loans [Line Items]
Recorded Investment		$ 175,000	$ 699,000
Pass [Member] | Minimum [Member]
Loans [Line Items]
Loans receivable risk rating | risk_rating		1
Non-Performing Loans [Member] | Maximum [Member]
Loans [Line Items]
Loans receivable risk rating | risk_rating		8
Loan Rated Five [Member] | Maximum [Member]
Loans [Line Items]
Loans receivable risk rating | risk_rating		5
Special Mention [Member]
Loans [Line Items]
Loans receivable risk rating | risk_rating		6
Potential Problem and Non-Performing [Member]
Loans [Line Items]
Loans receivable risk rating | risk_rating		7
Participating Mortgages [Member]
Loans [Line Items]
Loans Held-for-sale, Other		$ 52,200,000		36,600,000
Branch Closing, Sale [Member]
Loans [Line Items]
Loans Held-for-sale, Other				$ 36,300,000
[1]	Amounts at September 30, 2015, represent commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value. Generally, the Company intends to sell these loans within 30-60 days from the date the intent to sell was established. Amounts at December 31, 2014, consist of $36.6 million of commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value and $36.3 million of commercial, commercial real estate, construction, home equity and personal loans held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015.

Loans and Credit Quality (Carry

Loans and Credit Quality (Carrying Value Of Loans Pledged) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Loans pledged to secure outstanding borrowings or availability: [Abstract]
Loans pledged to secure FRB discount window borrowings availability	[1]	$ 416,573	$ 478,692
Loans pledged to secure FHLB advances	[2]	4,550,246	1,576,168
Total		$ 4,966,819	$ 2,054,860
[1]	No borrowings were outstanding at September 30, 2015 and December 31, 2014.
[2]	Refer to Notes 7 and 8 for additional information regarding FHLB advances.

Loans and Credit Quality (Loa51

Loans and Credit Quality (Loan Portfolio Aging) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Loans [Line Items]
Loan Portfolio Aging, Current	$ 13,028,912	$ 11,812,859
Financing Receivable, Recorded Investment, Past Due	13,035,332	11,824,675
Loan Portfolio Aging, Nonaccrual	43,982	67,544
Total Commercial	8,672,001	7,888,634
Total Commercial real estate	3,249,338	2,916,719
Total Construction	412,688	381,102
Total Residential real estate	439,005	361,565
Total Home equity	133,122	142,177
Total Personal	173,160	202,022
Total loans	13,079,314	11,892,219	$ 11,547,587
Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,236	7,696
Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,184	4,120
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Commercial [Member]
Loans [Line Items]
Loan Portfolio Aging, Current	8,649,998	7,855,833
Financing Receivable, Recorded Investment, Past Due	8,653,631	7,857,587
Loan Portfolio Aging, Nonaccrual	18,370	31,047
Total loans	8,672,001		7,905,401
Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	632	762
Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,001	992
Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Commercial real estate [Member]
Loans [Line Items]
Loan Portfolio Aging, Current	3,236,785	2,891,301
Financing Receivable, Recorded Investment, Past Due	3,237,297	2,896,970
Loan Portfolio Aging, Nonaccrual	12,041	19,749
Total loans	3,249,338		2,650,019
Commercial real estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	351	5,408
Commercial real estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	161	261
Commercial real estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction [Member]
Loans [Line Items]
Loan Portfolio Aging, Current	412,688	380,939
Financing Receivable, Recorded Investment, Past Due	412,688	381,102
Loan Portfolio Aging, Nonaccrual	0	0
Total loans	412,688		307,066
Construction [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	163
Construction [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Residential real estate [Member]
Loans [Line Items]
Loan Portfolio Aging, Current	434,173	354,717
Financing Receivable, Recorded Investment, Past Due	434,733	356,291
Loan Portfolio Aging, Nonaccrual	4,272	5,274
Total loans	439,005		343,573
Residential real estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	943
Residential real estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	560	631
Residential real estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Home equity [Member]
Loans [Line Items]
Loan Portfolio Aging, Current	123,278	128,500
Financing Receivable, Recorded Investment, Past Due	123,849	131,133
Loan Portfolio Aging, Nonaccrual	9,273	11,044
Total loans	133,122		141,159
Home equity [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	321	397
Home equity [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	250	2,236
Home equity [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Personal [Member]
Loans [Line Items]
Loan Portfolio Aging, Current	171,990	201,569
Financing Receivable, Recorded Investment, Past Due	173,134	201,592
Loan Portfolio Aging, Nonaccrual	26	430
Total loans	173,160		$ 200,369
Personal [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	932	23
Personal [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	212	0
Personal [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 0

Loans and Credit Quality (Impai

Loans and Credit Quality (Impaired Loans) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015		Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		$ 85,138		$ 106,095
Recorded Investment With No Specific Reserve		38,393		39,470
Recorded Investment With Specific Reserve		31,286		50,819
Total Recorded Investment		69,679	[1]	90,289	$ 95,565	[1]
Specific Reserve		9,072	[1]	16,627	18,981	[1]
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		50,150		60,174
Recorded Investment With No Specific Reserve		30,841		25,739
Recorded Investment With Specific Reserve		11,125		26,432
Total Recorded Investment		41,966	[1]	52,171	53,249	[1]
Specific Reserve		5,468	[1]	11,487	13,982	[1]
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		18,524		26,738
Recorded Investment With No Specific Reserve		3,289		9,755
Recorded Investment With Specific Reserve		8,752		10,193
Total Recorded Investment		12,041	[1]	19,948	19,886	[1]
Specific Reserve		1,465	[1]	2,441	3,223	[1]
Construction [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment	[1]	0			0
Specific Reserve	[1]	0			0
Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		4,459		5,849
Recorded Investment With No Specific Reserve		0		349
Recorded Investment With Specific Reserve		4,272		4,925
Total Recorded Investment		4,272	[1]	5,274	9,723	[1]
Specific Reserve		558	[1]	735	497	[1]
Home equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		11,979		12,904
Recorded Investment With No Specific Reserve		4,263		3,627
Recorded Investment With Specific Reserve		7,111		8,839
Total Recorded Investment		11,374	[1]	12,466	12,163	[1]
Specific Reserve		1,575	[1]	1,855	1,224	[1]
Personal [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance		26		430
Recorded Investment With No Specific Reserve		0		0
Recorded Investment With Specific Reserve		26		430
Total Recorded Investment		26	[1]	430	544	[1]
Specific Reserve		$ 6	[1]	$ 109	$ 55	[1]
[1]	Refer to Note 4 for additional information regarding impaired loans.

Loans and Credit Quality (Avera

Loans and Credit Quality (Average Recorded Investment And Interest Income Recognized On Impaired Loans) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	[1]	$ 82,841	$ 100,178	$ 86,965	$ 108,846
Interest Income Recognized	[1]	321	466	880	1,356
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	[1]	53,886	54,559	54,331	49,593
Interest Income Recognized	[1]	287	428	788	1,229
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	[1]	12,656	23,841	15,170	36,351
Interest Income Recognized	[1]	0	16	13	60
Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	[1]	4,332	9,522	4,594	9,665
Interest Income Recognized	[1]	0	0	0	0
Home equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	[1]	11,942	11,696	12,653	12,628
Interest Income Recognized	[1]	34	22	79	67
Personal [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	[1]	25	560	217	609
Interest Income Recognized	[1]	$ 0	$ 0	$ 0	$ 0
[1]	Represents amounts while classified as impaired for the periods presented.

Loans and Credit Quality (Credi

Loans and Credit Quality (Credit Quality Indicators) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Loans [Line Items]
Special Mention	$ 146,827	$ 100,989
Percentage of Special Mention to Portfolio Loan Type	1.10%	0.80%
Potential Problem Loans	$ 127,950	$ 87,442
Percentage of Potential Problem Loans to Portfolio Loan Type	1.00%	0.70%
Non-Performing Loans	$ 43,982	$ 67,544
Percentage of Non-Performing Loans to Portfolio Loan Type	0.30%	0.60%
Total Commercial	$ 8,672,001	$ 7,888,634
Total Commercial real estate	3,249,338	2,916,719
Total Construction	412,688	381,102
Total Residential real estate	439,005	361,565
Total Home equity	133,122	142,177
Total Personal	173,160	202,022
Total loans	13,079,314	11,892,219	$ 11,547,587
Commercial [Member]
Loans [Line Items]
Special Mention	$ 139,622	$ 93,130
Percentage of Special Mention to Portfolio Loan Type	1.60%	1.20%
Potential Problem Loans	$ 116,345	$ 78,562
Percentage of Potential Problem Loans to Portfolio Loan Type	1.30%	1.00%
Non-Performing Loans	$ 18,370	$ 31,047
Percentage of Non-Performing Loans to Portfolio Loan Type	0.20%	0.40%
Total loans	$ 8,672,001		7,905,401
Commercial real estate [Member]
Loans [Line Items]
Special Mention	77	$ 3,552
Percentage of Special Mention to Portfolio Loan Type		0.10%
Potential Problem Loans	$ 2,687	$ 746
Percentage of Potential Problem Loans to Portfolio Loan Type	0.10%
Non-Performing Loans	$ 12,041	$ 19,749
Percentage of Non-Performing Loans to Portfolio Loan Type	0.40%	0.70%
Total loans	$ 3,249,338		2,650,019
Construction [Member]
Loans [Line Items]
Special Mention	$ 0	$ 0
Percentage of Special Mention to Portfolio Loan Type	0.00%	0.00%
Potential Problem Loans	$ 0	$ 0
Percentage of Potential Problem Loans to Portfolio Loan Type	0.00%	0.00%
Non-Performing Loans	$ 0	$ 0
Percentage of Non-Performing Loans to Portfolio Loan Type	0.00%	0.00%
Total loans	$ 412,688		307,066
Residential real estate [Member]
Loans [Line Items]
Special Mention	$ 6,029	$ 2,964
Percentage of Special Mention to Portfolio Loan Type	1.40%	0.80%
Potential Problem Loans	$ 6,071	$ 5,981
Percentage of Potential Problem Loans to Portfolio Loan Type	1.40%	1.70%
Non-Performing Loans	$ 4,272	$ 5,274
Percentage of Non-Performing Loans to Portfolio Loan Type	1.00%	1.50%
Total loans	$ 439,005		343,573
Home equity [Member]
Loans [Line Items]
Special Mention	$ 487	$ 1,170
Percentage of Special Mention to Portfolio Loan Type	0.40%	0.80%
Potential Problem Loans	$ 2,696	$ 2,108
Percentage of Potential Problem Loans to Portfolio Loan Type	2.00%	1.50%
Non-Performing Loans	$ 9,273	$ 11,044
Percentage of Non-Performing Loans to Portfolio Loan Type	7.00%	7.80%
Total loans	$ 133,122		141,159
Personal [Member]
Loans [Line Items]
Special Mention	$ 612	$ 173
Percentage of Special Mention to Portfolio Loan Type	0.40%	0.10%
Potential Problem Loans	$ 151	$ 45
Percentage of Potential Problem Loans to Portfolio Loan Type	0.10%
Non-Performing Loans	$ 26	$ 430
Percentage of Non-Performing Loans to Portfolio Loan Type		0.20%
Total loans	$ 173,160		$ 200,369

Loans and Credit Quality (Troub

Loans and Credit Quality (Troubled Debt Restructured Loans Outstanding) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Performing Financial Instruments [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding		$ 25,697	$ 22,745
Performing Financial Instruments [Member] | Commercial [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding		23,596	21,124
Performing Financial Instruments [Member] | Commercial real estate [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding		0	199
Performing Financial Instruments [Member] | Residential real estate [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding		0	0
Performing Financial Instruments [Member] | Home equity [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding		2,101	1,422
Performing Financial Instruments [Member] | Personal [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding		0	0
Nonperforming Financial Instruments [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding	[1]	26,781	36,298
Nonperforming Financial Instruments [Member] | Commercial [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding	[1]	10,674	20,113
Nonperforming Financial Instruments [Member] | Commercial real estate [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding	[1]	9,397	8,005
Nonperforming Financial Instruments [Member] | Residential real estate [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding	[1]	1,308	1,881
Nonperforming Financial Instruments [Member] | Home equity [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding	[1]	5,402	5,886
Nonperforming Financial Instruments [Member] | Personal [Member]
Troubled Debt Restructured Loans Outstanding [Line Items]
Troubled debt restructured loans outstanding	[1]	$ 0	$ 413
[1]	Included in nonperforming loans.

Loans and Credit Quality (Addit

Loans and Credit Quality (Additions To TDR During The Period) (Detail) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015USD ($)borrower	Sep. 30, 2014USD ($)borrower	Sep. 30, 2015USD ($)borrower	Sep. 30, 2014USD ($)borrower
Performing Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		2	2	8	7
Recorded Investment, Pre-Modification	[1]	$ 7,800	$ 18,229	$ 23,955	$ 37,984
Recorded Investment, Post-Modification	[1]	$ 7,800	$ 18,229	23,674	37,984
Change in recorded investment due to principal paydown (advances) at time of modification				$ 281	$ 0
Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		4	6	18	18
Recorded Investment, Pre-Modification	[1]	$ 4,768	$ 18,243	$ 15,898	$ 21,641
Recorded Investment, Post-Modification	[1]	$ 4,768	$ 18,339	15,799	21,757
Change in recorded investment due to principal paydown (advances) at time of modification				$ 99	$ 50
Commercial [Member] | Performing Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				7	6
Recorded Investment, Pre-Modification	[1]			$ 23,609	$ 37,558
Recorded Investment, Post-Modification	[1]			$ 23,328	$ 37,558
Commercial [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		2	4	8	8
Recorded Investment, Pre-Modification	[1]	$ 4,492	$ 17,046	$ 9,855	$ 17,599
Recorded Investment, Post-Modification	[1]	$ 4,492	$ 17,046	$ 9,848	$ 17,549
Commercial [Member] | Extension of maturity date [Member] | Performing Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		2	1	7	3
Recorded Investment, Pre-Modification	[1],[2]	$ 7,800	$ 16,325	$ 23,609	$ 20,075
Recorded Investment, Post-Modification	[1],[2]	$ 7,800	$ 16,325	$ 23,328	$ 20,075
Commercial [Member] | Extension of maturity date [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		1	0	5	0
Recorded Investment, Pre-Modification	[1],[2]	$ 19	$ 0	$ 2,602	$ 0
Recorded Investment, Post-Modification	[1],[2]	$ 19	$ 0	$ 2,602	$ 0
Commercial [Member] | Other concession [Member] | Performing Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		0	1	0	3
Recorded Investment, Pre-Modification	[1],[3]	$ 0	$ 1,904	$ 0	$ 17,483
Recorded Investment, Post-Modification	[1],[3]	$ 0	$ 1,904	$ 0	$ 17,483
Commercial [Member] | Other concession [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		1	4	3	8
Recorded Investment, Pre-Modification	[1],[3]	$ 4,473	$ 17,046	$ 7,253	$ 17,599
Recorded Investment, Post-Modification	[1],[3]	$ 4,473	$ 17,046	$ 7,246	$ 17,549
Commercial real estate [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				3	2
Recorded Investment, Pre-Modification	[1]			$ 5,520	$ 1,773
Recorded Investment, Post-Modification	[1]			$ 5,433	$ 1,806
Commercial real estate [Member] | Extension of maturity date [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				2	0
Recorded Investment, Pre-Modification	[1],[2]			$ 1,747	$ 0
Recorded Investment, Post-Modification	[1],[2]			$ 1,660	$ 0
Commercial real estate [Member] | Other concession [Member] | Performing Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				0	1
Recorded Investment, Pre-Modification	[1],[3]			$ 0	$ 426
Recorded Investment, Post-Modification	[1],[3]			$ 0	$ 426
Commercial real estate [Member] | Other concession [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		0	1	1	2
Recorded Investment, Pre-Modification	[1],[3]	$ 0	$ 653	$ 3,773	$ 1,773
Recorded Investment, Post-Modification	[1],[3]	$ 0	$ 686	$ 3,773	$ 1,806
Residential real estate [Member] | Other concession [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				0	3
Recorded Investment, Pre-Modification	[1],[3]			$ 0	$ 496
Recorded Investment, Post-Modification	[1],[3]			$ 0	$ 566
Home equity [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				7	5
Recorded Investment, Pre-Modification	[1]			$ 523	$ 1,773
Recorded Investment, Post-Modification	[1]			$ 518	$ 1,836
Home equity [Member] | Extension of maturity date [Member] | Performing Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				1	0
Recorded Investment, Pre-Modification	[1],[2]			$ 346	$ 0
Recorded Investment, Post-Modification	[1],[2]			$ 346	$ 0
Home equity [Member] | Extension of maturity date [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower				3	1
Recorded Investment, Pre-Modification	[1],[2]			$ 170	$ 114
Recorded Investment, Post-Modification	[1],[2]			$ 165	$ 114
Home equity [Member] | Other concession [Member] | Nonperforming Financial Instruments [Member]
Additions to TDR During The Period [Line Items]
Financing Receivable, Modifications, Number of Contracts | borrower		2	1	4	4
Recorded Investment, Pre-Modification	[1],[3]	$ 276	$ 544	$ 353	$ 1,659
Recorded Investment, Post-Modification	[1],[3]	$ 276	$ 607	$ 353	$ 1,722
[1]	Represents amounts as of the date immediately prior to and immediately after the modification is effective.
[2]	Extension of maturity date also includes loans renewed at an existing rate of interest that is considered a below market rate for that particular loan’s risk profile.
[3]	Other concessions primarily include interest rate reductions, loan increases or deferrals of principal.

LOANS AND CREDIT QUALITY Loan57

LOANS AND CREDIT QUALITY Loans and Credit Quality (OREO Composition) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
OREO [Line Items]
Other real estate owned (OREO)	$ 12,760	$ 17,416
Single-Family Homes [Member]
OREO [Line Items]
Other real estate owned (OREO)	6,354	7,902
Land Parcels [Member]
OREO [Line Items]
Other real estate owned (OREO)	2,664	4,237
Multi-Family [Member]
OREO [Line Items]
Other real estate owned (OREO)	598	488
Office/Industrial [Member]
OREO [Line Items]
Other real estate owned (OREO)	1,799	3,832
Retail [Member]
OREO [Line Items]
Other real estate owned (OREO)	$ 1,345	$ 957

LOANS AND CREDIT QUALITY Loan58

LOANS AND CREDIT QUALITY Loans and Credit Quality (Covered Assets) (Details) - USD ($)		Sep. 30, 2015	Dec. 31, 2014
Disclosure Covered Assets Carrying Amount Of Covered Assets [Abstract]
Residential mortgage loans	[1]	$ 26,526,000	$ 32,182,000
Foreclosed real estate - single family homes		0	187,000
Estimated loss reimbursement by the FDIC		2,033,000	1,763,000
Covered assets		28,559,000	34,132,000
Allowance for covered loan losses		(6,337,000)	(5,191,000)
Net covered assets		22,222,000	28,941,000
Purchased credit-impaired loans		$ 262,000	$ 420,000
[1]	Includes $262,000 and $420,000 of purchased credit-impaired loans as of September 30, 2015, and December 31, 2014, respectively.

Allowance For Loan Losses And59

Allowance For Loan Losses And Reserve For Unfunded Commitments (Allowance For Loan Losses and Recorded Investment in Loans) (Detail) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014		Dec. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		$ 157,051		$ 146,491		$ 152,498		$ 143,109
Loans charged-off		(1,024)		(1,799)		(7,772)		(11,365)
Recoveries on loans previously charged-off		2,638		1,711		6,392		9,199
Net recoveries (charge-offs)		1,614		(88)		(1,380)		(2,166)
Provision (release) for loan losses		4,203		3,732		11,750		9,192
Balance at end of period		162,868		150,135		162,868		150,135
Ending balance, loans individually evaluated for impairment		9,072	[1]	18,981	[1]	9,072	[1]	18,981	[1]	$ 16,627
Ending balance, loans collectively evaluated for impairment		153,796		131,154		153,796		131,154
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment		69,679	[1]	95,565	[1]	69,679	[1]	95,565	[1]	90,289
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		13,009,635		11,452,022		13,009,635		11,452,022
Total loans		13,079,314		11,547,587		13,079,314		11,547,587		11,892,219
Commercial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		113,144		96,326		103,462		80,768
Loans charged-off		(661)		(227)		(5,784)		(3,856)
Recoveries on loans previously charged-off		2,115		1,145		3,610		5,620
Net recoveries (charge-offs)		1,454		918		(2,174)		1,764
Provision (release) for loan losses		6,413		6,642		19,723		21,354
Balance at end of period		121,011		103,886		121,011		103,886
Ending balance, loans individually evaluated for impairment		5,468	[1]	13,982	[1]	5,468	[1]	13,982	[1]	11,487
Ending balance, loans collectively evaluated for impairment		115,543		89,904		115,543		89,904
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment		41,966	[1]	53,249	[1]	41,966	[1]	53,249	[1]	52,171
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		8,630,035		7,852,152		8,630,035		7,852,152
Total loans		8,672,001		7,905,401		8,672,001		7,905,401
Commercial real estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		28,210		33,299		31,838		42,362
Loans charged-off		(175)		(1,133)		(1,160)		(5,797)
Recoveries on loans previously charged-off		134		356		1,004		2,404
Net recoveries (charge-offs)		(41)		(777)		(156)		(3,393)
Provision (release) for loan losses		(1,868)		(2,135)		(5,381)		(8,582)
Balance at end of period		26,301		30,387		26,301		30,387
Ending balance, loans individually evaluated for impairment		1,465	[1]	3,223	[1]	1,465	[1]	3,223	[1]	2,441
Ending balance, loans collectively evaluated for impairment		24,836		27,164		24,836		27,164
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment		12,041	[1]	19,886	[1]	12,041	[1]	19,886	[1]	19,948
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		3,237,297		2,630,133		3,237,297		2,630,133
Total loans		3,249,338		2,650,019		3,249,338		2,650,019
Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		3,816		3,621		4,290		3,338
Loans charged-off		0		(7)		0		(7)
Recoveries on loans previously charged-off		10		6		193		22
Net recoveries (charge-offs)		10		(1)		193		15
Provision (release) for loan losses		571		409		(86)		676
Balance at end of period		4,397		4,029		4,397		4,029
Ending balance, loans individually evaluated for impairment	[1]	0		0		0		0
Ending balance, loans collectively evaluated for impairment		4,397		4,029		4,397		4,029
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment	[1]	0		0		0		0
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		412,688		307,066		412,688		307,066
Total loans		412,688		307,066		412,688		307,066
Residential real estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		5,257		5,280		5,316		7,555
Loans charged-off		(97)		(252)		(328)		(667)
Recoveries on loans previously charged-off		198		9		302		444
Net recoveries (charge-offs)		101		(243)		(26)		(223)
Provision (release) for loan losses		(1,028)		(25)		(960)		(2,320)
Balance at end of period		4,330		5,012		4,330		5,012
Ending balance, loans individually evaluated for impairment		558	[1]	497	[1]	558	[1]	497	[1]	735
Ending balance, loans collectively evaluated for impairment		3,772		4,515		3,772		4,515
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment		4,272	[1]	9,723	[1]	4,272	[1]	9,723	[1]	5,274
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		434,733		333,850		434,733		333,850
Total loans		439,005		343,573		439,005		343,573
Home equity [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		4,615		5,015		4,924		5,648
Loans charged-off		(85)		(172)		(456)		(887)
Recoveries on loans previously charged-off		50		67		193		155
Net recoveries (charge-offs)		(35)		(105)		(263)		(732)
Provision (release) for loan losses		(292)		(661)		(373)		(667)
Balance at end of period		4,288		4,249		4,288		4,249
Ending balance, loans individually evaluated for impairment		1,575	[1]	1,224	[1]	1,575	[1]	1,224	[1]	1,855
Ending balance, loans collectively evaluated for impairment		2,713		3,025		2,713		3,025
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment		11,374	[1]	12,163	[1]	11,374	[1]	12,163	[1]	12,466
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		121,748		128,996		121,748		128,996
Total loans		133,122		141,159		133,122		141,159
Personal [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period		2,009		2,950		2,668		3,438
Loans charged-off		(6)		(8)		(44)		(151)
Recoveries on loans previously charged-off		131		128		1,090		554
Net recoveries (charge-offs)		125		120		1,046		403
Provision (release) for loan losses		407		(498)		(1,173)		(1,269)
Balance at end of period		2,541		2,572		2,541		2,572
Ending balance, loans individually evaluated for impairment		6	[1]	55	[1]	6	[1]	55	[1]	109
Ending balance, loans collectively evaluated for impairment		2,535		2,517		2,535		2,517
Recorded Investment in Loans: [Abstract]
Recorded Investment in Loans, Ending balance, loans individually evaluated for impairment		26	[1]	544	[1]	26	[1]	544	[1]	$ 430
Recorded Investment in Loans, Ending balance, loans collectively evaluated for impairment		173,134		199,825		173,134		199,825
Total loans		$ 173,160		$ 200,369		$ 173,160		$ 200,369
[1]	Refer to Note 4 for additional information regarding impaired loans.

Allowance For Loan Losses And60

Allowance For Loan Losses And Reserve For Unfunded Commitments (Reserve For Unfunded Commitments) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reserve for Unfunded Commitments [Roll Forward]
Balance at beginning of period	[1]	$ 13,157	$ 9,363	$ 12,274	$ 9,206
Provision (release) for unfunded commitments	[1]	2,048	481	2,931	638
Recovery of unfunded commitments	[1]	4		4
Balance at end of period	[1]	15,209	9,844	15,209	9,844
Unfunded commitments, excluding covered assets, at period end	[1]	$ 6,310,701	$ 5,365,042	$ 6,310,701	$ 5,365,042
[1]	Unfunded commitments include commitments to extend credit, standby letters of credit and commercial letters of credit. Unfunded commitments related to covered assets are excluded as they are covered under a loss sharing agreement with the FDIC.

Goodwill And Other Intangible61

Goodwill And Other Intangible Assets (Carrying Amount of Goodwill by Operating Segment) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill	$ 94,041	$ 94,041
Banking [Member]
Goodwill [Line Items]
Goodwill	81,755	81,755
Asset Management [Member]
Goodwill [Line Items]
Goodwill	$ 12,286	$ 12,286

Goodwill And Other Intangible62

Goodwill And Other Intangible Assets (Narrative) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 0
Impairment of intangible assets	$ 0
Minimum [Member]
Goodwill [Line Items]
Intangible assets amortized estimated useful lives	8 years
Maximum [Member]
Goodwill [Line Items]
Intangible assets amortized estimated useful lives	12 years

Goodwill And Other Intangible63

Goodwill And Other Intangible Assets (Other Intangible Assets) (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization during the period	$ 1,877	$ 2,265
Core Deposits Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	18,093		$ 18,093
Accumulated amortization	14,603		12,870
Net carrying amount	3,490		5,223
Amortization during the period	$ 1,733		$ 2,799
Weighted average remaining life (in years)	2 years		2 years
Client Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,002		$ 2,002
Accumulated amortization	1,484		1,340
Net carrying amount	518		662
Amortization during the period	$ 144		$ 208
Weighted average remaining life (in years)	5 years		6 years

Goodwill And Other Intangible64

Goodwill And Other Intangible Assets (Scheduled Amortization Of Other Intangible Assets) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015 - remaining months	$ 578
2,016	2,161
2,017	1,125
2,018	98
2,019	28
2020 and thereafter	18
Total	$ 4,008	$ 5,885

Short-Term Borrowings (Summary

Short-Term Borrowings (Summary Of Short-Term Borrowings) (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2015	Dec. 31, 2014
Outstanding: [Abstract]
Repurchase agreements		$ 57,965
FHLB advances, Short-term		$ 452,000	$ 428,000
Secured borrowings, Interest rate		4.10%	4.45%
Short-term borrowings		$ 514,121	$ 432,385
Unused Availability: [Abstract]
Federal funds availability	[1]	630,500	630,500
FRB discount window primary credit program availability	[2]	363,590	403,752
FHLB advances availability	[3]	1,506,937	265,529
FHLB advances borrowing capacity		$ 2,351,900
Narrative: [Abstract]
Repurchase agreements, Maturities		P13D
Repurchase agreements, Collateral		$ 59,900
Repurchase Agreement Counterparty, Amount at Risk		$ 0
Revolving Line of Credit, Conversion to Term Loan Option, Conversion Date		Sep. 23, 2016
Revolving Line of Credit, Conversion to Term Loan Option, Loan Interest Option Increment Over Libor		1.75%
Revolving Line of Credit, Conversion to Term Loan Option, Loan Interest Option Increment Under PRIME		0.50%
Revolving Line of Credit, Conversion to Term Loan Option, Term Loan Due Date		Sep. 24, 2018
Revolving Credit Facility [Member]
Unused Availability: [Abstract]
Revolving Line of Credit, maximum borrowing capacity		$ 60,000	60,000
Narrative: [Abstract]
Revolving Line of Credit, Amount Outstanding		0
Federal Home Loan Bank of Atlanta [Member]
Outstanding: [Abstract]
FHLB advances, Short-term		2,000
Narrative: [Abstract]
Federal Home Loan Bank Advances		7,000
Federal Home Loan Bank of Chicago [Member]
Outstanding: [Abstract]
FHLB advances, Short-term		450,000
Narrative: [Abstract]
Federal Home Loan Bank Advances		845,000
Short-term Debt [Member]
Outstanding: [Abstract]
Repurchase agreements		$ 57,965	$ 0
Repurchase agreements, Rate		0.40%	0.00%
FHLB advances, Short-term Rate		0.15%	0.13%
Secured borrowings		$ 4,156	$ 4,385
[1]	Our total availability of overnight Federal fund ("Fed funds") borrowings is not a committed line of credit and is dependent upon lender availability.
[2]	Our borrowing capacity changes each quarter subject to available collateral and FRB discount factors.
[3]	As a member of the FHLB Chicago, the Bank has access to borrowing capacity which is subject to change based on the availability of acceptable collateral to pledge and the level of our investment in FHLB Chicago stock. At September 30, 2015, our borrowing capacity was $2.4 billion, of which $1.5 billion is available, subject to making the required additional investment in FHLB Chicago stock. Qualifying residential, multi-family and commercial real estate loans, home equity lines of credit, and residential mortgage-backed securities are pledged as collateral to secure current outstanding balances and additional borrowing availability.

LONG-TERM DEBT Long-Term Debt66

LONG-TERM DEBT Long-Term Debt (Long-Term Debt) (Details) - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt		$ 694,788		$ 344,788
Forward Commitment Advance with FHLB		150,000		150,000
Parent Company [Member]
Debt Instrument [Line Items]
Long-term debt		294,788		294,788
Parent Company [Member] | Three Month Libor Plus Two Point Six Five Percentage [Member]
Debt Instrument [Line Items]
Junior subordinated debentures	[1]	8,248		8,248
Parent Company [Member] | Three Month Libor Plus One Point Seven One Percentage [Member]
Debt Instrument [Line Items]
Junior subordinated debentures	[1]	51,547		51,547
Parent Company [Member] | Three Month Libor Plus One Point Five Zero Percentage [Member]
Debt Instrument [Line Items]
Junior subordinated debentures	[1]	41,238		41,238
Parent Company [Member] | Ten Point Zero Zero Percentage Junior Subordinated Debentures Due Two Zero Six Eight [Member]
Debt Instrument [Line Items]
Junior subordinated debentures	[1]	68,755		68,755
Subsidiaries [Member] | Floating, FHLBC Overnight Discount Note Index Plus Zero Point Zero Six Five Percentage [Member]
Debt Instrument [Line Items]
FHLB advances, long-term		350,000		0
Subsidiaries [Member] | Fixed Interest Rate [Member]
Debt Instrument [Line Items]
FHLB advances, long-term	[2],[3]	50,000		50,000
Subsidiaries [Member] | Fixed Interest Rate [Member] | Credit Expansion Option [Member]
Debt Instrument [Line Items]
FHLB advances, long-term		$ 45,000	[2],[3]	45,000
Long-term Debt [Member] | Parent Company [Member] | Three Month Libor Plus Two Point Six Five Percentage [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.98%
Subordinated Borrowing, Due Date		Jun. 17, 2034
Long-term Debt [Member] | Parent Company [Member] | Three Month Libor Plus One Point Seven One Percentage [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.05%
Subordinated Borrowing, Due Date		Sep. 15, 2035
Long-term Debt [Member] | Parent Company [Member] | Three Month Libor Plus One Point Five Zero Percentage [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.84%
Subordinated Borrowing, Due Date		Dec. 15, 2035
Long-term Debt [Member] | Parent Company [Member] | Ten Point Zero Zero Percentage Junior Subordinated Debentures Due Two Zero Six Eight [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		10.00%
Subordinated Borrowing, Due Date		Jun. 15, 2068
Long-term Debt [Member] | Parent Company [Member] | Seven Point One Two Five Percentage Subordinated Debentures due Two Zero Four Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.125%
Subordinated Borrowing, Due Date		Oct. 30, 2042
Subordinated debentures	[4]	$ 125,000		$ 125,000
Long-term Debt [Member] | Subsidiaries [Member] | Fixed Interest Rate [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Weighted Average Interest Rate		3.75%
Long-term Debt [Member] | Subsidiaries [Member] | Fixed Interest Rate [Member] | December 9, 2019 [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Interest Rate, Range From		3.58%
Long-term Debt [Member] | Subsidiaries [Member] | Fixed Interest Rate [Member] | May 22, 2019 [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Interest Rate, Range To		4.68%
Long-term Debt [Member] | Subsidiaries [Member] | Fixed Interest Rate [Member] | Credit Expansion Option [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Weighted Average Interest Rate		3.66%
Federal Home Loan Bank Advances [Member] | Subsidiaries [Member] | Floating, FHLBC Overnight Discount Note Index Plus Zero Point Zero Six Five Percentage [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.10%
Debt Instrument, Maturity Date		Jun. 5, 2017
Federal Home Loan Bank Advances [Member] | Subsidiaries [Member] | Fixed Interest Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Mar. 25, 2019
[1]	Under the final regulatory capital rules issued in July 2013, these instruments are grandfathered for inclusion as a component of Tier 1 capital, although the Tier 1 capital treatment for these instruments could be subject to phase-out due to certain acquisitions.
[2]	Amounts reported at September 30, 2015 and December 31, 2014 include three long-term advances totaling $45.0 million with a weighted average interest rate of 3.66% due in 2019. The advances provide for a one-time option, two years from issuance date, to increase the amount outstanding up to $150.0 million each at the same fixed rate as the original advance. The advances include a prepayment feature and are subject to a prepayment fee.
[3]	Weighted average interest rate was 3.75% at September 30, 2015 and December 31, 2014.
[4]	Qualifies as Tier 2 capital for regulatory capital purposes.

LONG-TERM DEBT Long-Term Debt67

LONG-TERM DEBT Long-Term Debt (Narrative) (Details) $ in Thousands	Sep. 30, 2015USD ($)trust
Debt [Line Items]
Junior subordinated debentures | $	$ 169,788	[1]
Number of wholly-owned trusts	4
[1]	The Trust Preferred Securities accrue distributions at a rate equal to the interest rate on, and have a maturity identical to that of, the related Debentures. The Trust Preferred Securities are subject to mandatory redemption, in whole or in part, upon repayment of the Debentures at maturity or upon their earlier redemption in whole or in part. The Debentures are redeemable in whole or in part prior to maturity at any time and only after we have obtained Federal Reserve approval, if then required under applicable guidelines or regulations.

LONG-TERM DEBT Long-Term Debt68

LONG-TERM DEBT Long-Term Debt (Scheduled Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Year ending December 31, [Abstract]
2,017	$ 350,000
2,019	50,000
2020 and thereafter	294,788
Long-term debt	$ 694,788	$ 344,788

Junior Subordinated Deferrabl69

Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities (Narrative) (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)trust		Sep. 30, 2015USD ($)trust
Debt [Line Items]
Ownership percentage	100.00%		100.00%
Number of wholly-owned trusts | trust	4		4
Junior subordinated debentures	$ 169,788	[1]	$ 169,788	[1]
Parent Company [Member] | Seven Point One Two Five Percentage Subordinated Debentures Due Two Zero Four Two [Member] | Long-term Debt [Member]
Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.125%		7.125%
Subordinated Borrowing, Due Date	Oct. 30, 2042
PrivateBancorp Capital Trust IV [Member]
Debt [Line Items]
Junior subordinated debentures	$ 68,755	[1]	$ 68,755	[1]
Debt Instrument, Covenant Description			Under the replacement capital covenant, as amended in October 2012, we committed, for the benefit of certain debt holders, that we would not repay, redeem or repurchase the 10% Debentures or the related Trust Preferred Securities prior to June 2048 unless we have (1) obtained any required regulatory approval, and (2) raised certain amounts of qualifying equity or equity-like replacement capital at any time after October 10, 2012.
Debt Instrument, Interest Rate, Stated Percentage	10.00%		10.00%
[1]	The Trust Preferred Securities accrue distributions at a rate equal to the interest rate on, and have a maturity identical to that of, the related Debentures. The Trust Preferred Securities are subject to mandatory redemption, in whole or in part, upon repayment of the Debentures at maturity or upon their earlier redemption in whole or in part. The Debentures are redeemable in whole or in part prior to maturity at any time and only after we have obtained Federal Reserve approval, if then required under applicable guidelines or regulations.

Junior Subordinated Deferrabl70

Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities (Common Securities, Preferred Securities, And Related Debentures) (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2015	Dec. 31, 2014
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Common securities issued		$ 78,197	$ 77,211
Principal Amount of Debentures	[1]	$ 169,788
Three Month Libor Plus Two Point Six Five Percentage [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Increment Over Libor Of Long Term Debt		2.65%
Three Month Libor Plus One Point Seven One Percentage [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Increment Over Libor Of Long Term Debt		1.71%
Three Month Libor Plus One Point Five Zero Percentage [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Increment Over Libor Of Long Term Debt		1.50%
Bloomfield Hills Statutory Trust I [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Issuance Date		May 2004
Common securities issued		$ 248
Trust Preferred Securities Issued	[1]	$ 8,000
Coupon Rate		2.98%
Maturity		June 2,034
Principal Amount of Debentures	[1]	$ 8,248
PrivateBancorp Statutory Trust II [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Issuance Date		June 2005
Common securities issued		$ 1,547
Trust Preferred Securities Issued	[1]	$ 50,000
Coupon Rate		2.05%
Maturity		Sept. 2035
Principal Amount of Debentures	[1]	$ 51,547
PrivateBancorp Statutory Trust III [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Issuance Date		Dec. 2005
Common securities issued		$ 1,238
Trust Preferred Securities Issued	[1]	$ 40,000
Coupon Rate		1.84%
Maturity		Dec. 2035
Principal Amount of Debentures	[1]	$ 41,238
PrivateBancorp Capital Trust IV [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Issuance Date		May 2008
Common securities issued		$ 5
Trust Preferred Securities Issued	[1]	$ 68,750
Coupon Rate		10.00%
Maturity		June 2,068
Principal Amount of Debentures	[1]	$ 68,755
Junior Subordinated Debt [Member]
Junior Subordinated Deferrable Interest Debentures Held By Trusts That Issued Guaranteed Capital Debt Securities [Line Items]
Common securities issued		3,038
Trust Preferred Securities Issued	[1]	$ 166,750
[1]	The Trust Preferred Securities accrue distributions at a rate equal to the interest rate on, and have a maturity identical to that of, the related Debentures. The Trust Preferred Securities are subject to mandatory redemption, in whole or in part, upon repayment of the Debentures at maturity or upon their earlier redemption in whole or in part. The Debentures are redeemable in whole or in part prior to maturity at any time and only after we have obtained Federal Reserve approval, if then required under applicable guidelines or regulations.

EQUITY Equity (Narrative) (Deta

EQUITY Equity (Narrative) (Details) - shares	Sep. 30, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Nonvoting Common Stock, Shares Authorized	174,000,000	174,000,000
Treasury Stock, Shares	1,601	1,704
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	1,000,000
Preferred Stock, Shares Outstanding	0
Nonvoting Common Stock [Member]
Class of Stock [Line Items]
Nonvoting Common Stock, Shares Authorized	5,000,000
Nonvoting Common Stock, Shares Outstanding	0

Equity (Change in Accumulated O

Equity (Change in Accumulated Other Comprehensive Income by Component) (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Beginning Balance		$ 1,481,679	$ 1,301,904
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Tax benefit (expense) on increase in unrealized gains (losses)		(8,675)	(7,031)
OCI, before reclassifications, net of tax		13,569	10,812
Reclassification adjustment of net gains included in net income	[1]	(8,561)	(7,293)
Reclassification adjustment for tax expense on realized net gains	[2]	3,324	2,873
Amount reclassified from AOCI		(5,237)	(4,420)
Net current period other comprehensive income (loss)		8,332	6,392
Stockholders' Equity, Ending Balance		1,647,999	1,435,309
Accumulated Other Comprehensive Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Beginning Balance		20,917	9,844
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Stockholders' Equity, Ending Balance		29,249	16,236
Unrealized Gain (Loss) on Available-for-Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Beginning Balance		19,448	12,960
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Increase (decrease) in unrealized gains, before reclassifications, before Tax		3,857	8,133
Tax benefit (expense) on increase in unrealized gains (losses)		(1,536)	(3,216)
OCI, before reclassifications, net of tax		2,321	4,917
Reclassification adjustment of net gains included in net income	[1]	(918)	(530)
Reclassification adjustment for tax expense on realized net gains	[2]	356	209
Amount reclassified from AOCI		(562)	(321)
Net current period other comprehensive income (loss)		1,759	4,596
Stockholders' Equity, Ending Balance		21,207	17,556
Accumulated Gain (Loss) on Effective Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Beginning Balance		1,469	(3,116)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Increase (decrease) in unrealized gains, before reclassifications, before Tax		18,387	9,710
Tax benefit (expense) on increase in unrealized gains (losses)		(7,139)	(3,815)
OCI, before reclassifications, net of tax		11,248	5,895
Reclassification adjustment of net gains included in net income	[1]	(7,643)	(6,763)
Reclassification adjustment for tax expense on realized net gains	[2]	2,968	2,664
Amount reclassified from AOCI		(4,675)	(4,099)
Net current period other comprehensive income (loss)		6,573	1,796
Stockholders' Equity, Ending Balance		$ 8,042	$ (1,320)
[1]	The amounts reclassified from AOCI for the available-for-sale securities are reported in net securities gains on the Consolidated Statements of Income, while the amounts reclassified from AOCI for cash flow hedges are reported in interest income on loans on the Consolidated Statements of Income.
[2]	The tax expense amounts reclassified from AOCI in connection with the available-for-sale securities reclassification and cash flow hedges reclassification are reported in income tax provision on the Consolidated Statements of Income.

Earnings Per Common Share (Basi

Earnings Per Common Share (Basic and Diluted Earnings Per Common Share) (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic earnings per common share
Net income		$ 45,268	$ 40,527	$ 133,174	$ 115,856
Net income allocated to participating stockholders	[1]	(354)	(515)	(1,195)	(1,666)
Net income allocated to common stockholders		$ 44,914	$ 40,012	$ 131,979	$ 114,190
Weighted-average common shares outstanding		78,144,000	77,110,000	77,834,000	76,951,000
Basic earnings per common share		$ 0.58	$ 0.52	$ 1.70	$ 1.48
Diluted earnings per common share
Diluted earnings applicable to common stockholders	[2]	$ 44,922	$ 40,017	$ 131,997	$ 114,206
Weighted-average common shares outstanding		78,144,000	77,110,000	77,834,000	76,951,000
Dilutive effect of stock awards	[3]	1,257,000	824,000	1,193,000	770,000
Weighted-average diluted common shares outstanding		79,401,000	77,934,000	79,027,000	77,721,000
Diluted earnings per common share		$ 0.57	$ 0.51	$ 1.67	$ 1.47
Employee Stock Option [Member]
Diluted earnings per common share
Antidilutive shares, excluded from computation		240,000	1,300,000	401,000	1,300,000
[1]	Participating stockholders are those that hold certain share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. Such shares or units are considered participating securities (i.e., certain of the Company’s deferred and restricted stock units and nonvested restricted stock awards).
[2]	Net income allocated to common stockholders for basic and diluted earnings per share may differ under the two-class method as a result of adding common stock equivalents for options to dilutive shares outstanding, which alters the ratio used to allocate earnings to common stockholders and participating securities for the purposes of calculating diluted earnings per share.
[3]	For the quarters ended September 30, 2015 and 2014, the weighted-average outstanding non-participating securities of 240,000 and 1.3 million shares, respectively, and for the nine months ended September 30, 2015 and 2014, the weighted-average outstanding non-participating securities of 401,000 and 1.3 million shares, respectively, were not included in the computation of diluted earnings per common share because their inclusion would have been antidilutive for the periods presented.

Income Taxes (Income Tax Provis

Income Taxes (Income Tax Provision Analysis) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ 72,626	$ 65,701	$ 213,012	$ 188,050
Income tax provision:
Current income tax provision	32,897	31,406	83,128	77,359
Deferred income tax provision (benefit)	(5,539)	(6,232)	(3,290)	(5,165)
Total income tax provision (benefit)	$ 27,358	$ 25,174	$ 79,838	$ 72,194
Effective tax rate	37.70%	38.30%	37.50%	38.40%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Disclosure Income Taxes Narrative [Abstract]
Net deferred tax assets	$ 96,000,000	$ 98,200,000
Deferred Tax Assets, Valuation Allowance	0
Unrecognized tax benefits relating to uncertain tax positions	$ 131,000	$ 212,000

Derivative Instruments (Notiona

Derivative Instruments (Notional Amounts and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Interest rate contracts, cash flow hedging, asset derivatives		$ 12,451	$ 4,542
Derivatives, not designated as hedging, asset derivatives		65,664	49,108
Netting adjustments	[1],[2],[3]	(18,137)	(10,588)
Total derivatives, asset derivatives	[1]	59,978	43,062
Interest rate contracts, cash flow hedging, liability derivatives		0	2,715
Derivatives, not designated as hedging, liability derivatives		67,205	49,321
Netting adjustments	[1],[2],[3]	(45,238)	(25,269)
Total derivatives, liability derivatives	[1]	21,967	26,767
Client-Related Derivatives [Member]
Derivative [Line Items]
Interest rate contracts, not designated as hedging, asset derivatives		60,498	42,879
Foreign exchange contracts, not designated as hedging, asset derivatives		4,741	5,183
Credit contracts, not designated as hedging, asset derivatives		15	19
Derivatives, not designated as hedging, asset derivatives		65,254	48,081
Interest rate contracts, not designated as hedging, liability derivatives		62,776	43,792
Foreign exchange contracts, not designated as hedging, liability derivatives		3,958	4,659
Credit contracts, not designated as hedging, liability derivatives		52	24
Derivatives, not designated as hedging, liability derivatives		66,786	48,475
Other End-User Derivatives [Member]
Derivative [Line Items]
Foreign exchange contracts, not designated as hedging, asset derivatives		142	241
Mortgage banking derivatives, not designated as hedging, asset derivatives		268	786
Derivatives, not designated as hedging, asset derivatives		410	1,027
Foreign exchange contracts, not designated as hedging, liability derivatives		14	45
Mortgage banking derivatives, not designated as hedging, liability derivatives		405	801
Derivatives, not designated as hedging, liability derivatives		419	846
Interest Rate Contract [Member]
Derivative [Line Items]
Netting adjustments	[1],[2]	(15,228)	(7,433)
Netting adjustments	[1],[2]	(43,023)	(24,067)
Foreign Exchange Contract [Member]
Derivative [Line Items]
Netting adjustments	[1],[2]	(2,867)	(3,154)
Netting adjustments	[1],[2]	(2,173)	(1,202)
Risk participation agreements [Member]
Derivative [Line Items]
Netting adjustments	[1],[2]	0	(1)
Netting adjustments	[1],[2]	0	0
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Notional amount, asset derivatives	[4]	800,000	550,000
Notional amount, liability derivatives	[4]	0	250,000
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Client-Related Derivatives [Member]
Derivative [Line Items]
Notional amount, asset derivatives	[4]	3,900,911	3,881,202
Notional amount, liability derivatives	[4]	3,820,911	3,743,827
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Client-Related Derivatives [Member]
Derivative [Line Items]
Notional amount, asset derivatives	[4]	176,060	98,285
Notional amount, liability derivatives	[4]	162,394	86,582
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other End-User Derivatives [Member]
Derivative [Line Items]
Notional amount, asset derivatives	[4]	18,754	18,551
Notional amount, liability derivatives	[4]	5,098	2,892
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Client-Related Derivatives [Member]
Derivative [Line Items]
Notional amount, asset derivatives	[4]	86,318	98,478
Notional amount, liability derivatives	[4]	$ 121,377	$ 100,941
[1]	All derivative contracts are over-the-counter contracts.
[2]	Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement.
[3]	Represents netting of derivative asset and liability balances, and related cash collateral, with the same counterparty subject to master netting agreements. Refer to Note 14 for additional information regarding master netting agreements.
[4]	The remaining average notional amounts are shown for risk participation agreements.

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details)	9 Months Ended
	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Derivative [Line Items]
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	$ 0
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	5 years
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	$ 0
Net deferred gains (losses), net of tax, recorded in AOCI expected to be reclassified into earnings during the next 12 months	5,500,000
Gain (Loss) on Discontinuation of Interest Rate Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	0
Interest rate lock commitments	61,000,000
Forward commitments for the future delivery of residential mortgage loans	95,300,000
Foreign currency risk on loans	$ 15,500,000
Minimum [Member]
Derivative [Line Items]
Written RPAs Range Of Internal Risk Ratings	1
Maximum [Member]
Derivative [Line Items]
Written RPAs Range Of Internal Risk Ratings	8
Mortgage Receivable [Member]
Derivative [Line Items]
Mortgage loans held-for-sale, par value	$ 23,957,000	$ 42,199,000

Derivative Instruments (Derivat

Derivative Instruments (Derivatives Subject To Credit Risk Contingency Features) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Description of Credit Risk Related Contingent Features [Abstract]
Fair Value of derivatives with credit contingency features in a net liability position	$ 11,151	$ 14,596
Collateral posted for those transactions in a net liability position	12,922	16,865
If credit risk contingency features were triggered: [Abstract]
Additional Collateral required to be posted to derivative counterparties	0	0
Outstanding derivative instruments that would be immediately settled	$ 11,151	$ 14,596

Derivative Instruments (Change

Derivative Instruments (Change In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedge) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Amount of gain (loss) recognized in AOCI (effective portion), Pre-tax	$ 10,261	$ (2,168)	$ 18,387	$ 9,710
Reclassification adjustment of net gains included in net income	(2,571)	(2,456)	(7,643)	(6,763)
Interest Rate Contract [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated unrealized gain (loss) at beginning of period, pre-tax	5,459	2,461	2,405	(5,110)
Amount of gain (loss) recognized in AOCI (effective portion), Pre-tax	10,261	(2,168)	18,387	9,710
Reclassification adjustment of net gains included in net income	(2,571)	(2,456)	(7,643)	(6,763)
Accumulated unrealized gain (loss) at end of period, pre-tax	13,149	(2,163)	13,149	(2,163)
Accumulated unrealized gain (loss) balance at beginning of period	3,339	1,501	1,469	(3,116)
Amount of gain (loss) recognized in AOCI (effective portion), After-tax	6,276	(1,333)	11,248	5,895
Amount reclassified from AOCI to interest income on loans, After-tax	(1,573)	(1,488)	(4,675)	(4,099)
Accumulated unrealized gain (loss) balance at end of period	$ 8,042	$ (1,320)	$ 8,042	$ (1,320)

Derivative Instruments (Risk Pa

Derivative Instruments (Risk Participation Agreements) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015USD ($)risk_rating	Dec. 31, 2014USD ($)risk_rating
Derivative [Line Items]
Fair value of written RPAs	$ 52	$ 24
Maximum potential amount of future undiscounted payments	$ 3,142	$ 3,927
Percent of maximum potential amount of future undiscounted payments covered by proceeds from liquidation of pledged collateral	43.00%	25.00%
Minimum [Member]
Derivative [Line Items]
Range of Risk Participation Agreement Terms to Maturity (in years)	1 year	1 year
Range of assigned internal risk ratings for written RPAs | risk_rating	2	2
Maximum [Member]
Derivative [Line Items]
Range of Risk Participation Agreement Terms to Maturity (in years)	5 years	4 years
Range of assigned internal risk ratings for written RPAs | risk_rating	7	7

Derivative Instruments (Gain (L

Derivative Instruments (Gain (Loss) Recognized On Derivative Instruments Not Designated In Hedging Relationship) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Client-related derivatives	$ 3,098	$ 3,253	$ 12,189	$ 12,342
End-user derivatives	92	1,155	983	587
Total derivatives not designated in hedging relationship	3,190	4,408	13,172	12,929
Interest Rate Contract [Member]
Derivative [Line Items]
Client-related derivatives	1,190	1,626	6,089	6,644
Foreign Exchange Contract [Member]
Derivative [Line Items]
Client-related derivatives	1,920	1,577	6,023	5,376
End-user derivatives	558	1,028	1,108	776
Risk participation agreements [Member]
Derivative [Line Items]
Client-related derivatives	(12)	50	77	322
Mortgage Banking Derivatives [Member]
Derivative [Line Items]
End-user derivatives	$ (466)	$ 127	$ (125)	$ (189)

BALANCE SHEET OFFSETTING Bala82

BALANCE SHEET OFFSETTING Balance Sheet Offsetting (Narrative) (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Balance Sheet Offsetting [Abstract]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	$ 27,100,000	$ 14,700,000
Pledged Assets Separately Reported, Other Assets Pledged as Collateral, at Fair Value	$ 0	$ 0

BALANCE SHEET OFFSETTING Bala83

BALANCE SHEET OFFSETTING Balance Sheet Offsetting (Offsetting of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Derivative Asset [Abstract]
Derivative Asset, Fair Value, Gross Asset	[1]	$ 76,343	$ 51,104
Derivative Asset, Not Subject to Master Netting Arrangement	[1]	1,772	2,546
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	[1]	78,115	53,650
Derivative Asset, Fair Value, Gross Liability	[1],[2],[3]	(18,137)	(10,588)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	[1]	58,206	40,516
Derivative Asset	[1]	59,978	43,062
Derivative, Collateral, Obligation to Return Securities	[1],[4],[5]	0	0
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	58,206	40,516
Derivative Asset, Fair Value, Amount Offset Against Collateral	[1]	59,978	43,062
Derivative Liability [Abstract]
Derivative Liability, Fair Value, Gross Liability	[1]	65,844	48,952
Derivative Liability, Not Subject to Master Netting Arrangement	[1]	1,361	3,084
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	[1]	67,205	52,036
Derivative Liability, Fair Value, Gross Asset	[1],[2],[3]	(45,238)	(25,269)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	[1]	20,606	23,683
Derivative Liability	[1]	21,967	26,767
Derivative, Collateral, Right to Reclaim Securities	[1],[4],[5]	(15,266)	(18,739)
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	5,340	4,944
Derivative Liability, Fair Value, Amount Offset Against Collateral	[1]	6,701	8,028
Repurchase agreements, Gross		57,965
Repurchase agreements, Fair Value, Gross Asset	[2]	0
Repurchase agreements		57,965
Repurchase agreements, Collateral, Right to Reclaim Securities	[4],[5]	57,965
Repurchase agreements, Collateral, Right to Reclaim Cash	[4]	0
Repurchase agreements, Amount Offset Against Collateral		0
Financial Liabilities, Fair Value, Gross Liability		125,170
Financial Liabilities, Fair Value, Amount Not Offset Against Collateral, Total		79,932
Financial Liabilities, Collateral, Right to Reclaim Securities	[4],[5]	(73,231)
Financial Liabilities, Collateral, Right to Reclaim Cash	[4]	0
Financial Liabilities, Amount Offset Against Collateral, Total		6,701
Interest Rate Contract [Member]
Derivative Asset [Abstract]
Derivative Asset, Fair Value, Gross Asset	[1]	72,949	47,421
Derivative Asset, Fair Value, Gross Liability	[1],[2]	(15,228)	(7,433)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	[1]	57,721	39,988
Derivative, Collateral, Obligation to Return Securities	[1],[4],[5]	0
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	57,721	39,988
Derivative Liability [Abstract]
Derivative Liability, Fair Value, Gross Liability	[1]	62,776	46,507
Derivative Liability, Fair Value, Gross Asset	[1],[2]	(43,023)	(24,067)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	[1]	19,753	22,440
Derivative, Collateral, Right to Reclaim Securities	[1],[4],[5]	(14,725)	(17,755)
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	5,028	4,685
Foreign Exchange Contract [Member]
Derivative Asset [Abstract]
Derivative Asset, Fair Value, Gross Asset	[1]	3,337	3,664
Derivative Asset, Fair Value, Gross Liability	[1],[2]	(2,867)	(3,154)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	[1]	470	510
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	470	510
Derivative Liability [Abstract]
Derivative Liability, Fair Value, Gross Liability	[1]	2,846	2,421
Derivative Liability, Fair Value, Gross Asset	[1],[2]	(2,173)	(1,202)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	[1]	673	1,219
Derivative, Collateral, Right to Reclaim Securities	[1],[4],[5]	(502)	(965)
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	171	254
Risk participation agreements [Member]
Derivative Asset [Abstract]
Derivative Asset, Fair Value, Gross Asset	[1]	15	19
Derivative Asset, Fair Value, Gross Liability	[1],[2]	0	(1)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	[1]	15	18
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	15	18
Derivative Liability [Abstract]
Derivative Liability, Fair Value, Gross Liability	[1]	52	24
Derivative Liability, Fair Value, Gross Asset	[1],[2]	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	[1]	52	24
Derivative, Collateral, Right to Reclaim Securities	[1],[4],[5]	(39)	(19)
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	13	$ 5
Mortgage Banking Derivatives [Member]
Derivative Asset [Abstract]
Derivative Asset, Fair Value, Gross Asset	[1]	42
Derivative Asset, Fair Value, Gross Liability	[1],[2]	(42)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	[1]	0
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	0
Derivative Liability [Abstract]
Derivative Liability, Fair Value, Gross Liability	[1]	170
Derivative Liability, Fair Value, Gross Asset	[1],[2]	(42)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	[1]	128
Derivative, Collateral, Right to Reclaim Securities	[1],[4],[5]	0
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	[1]	$ 128
[1]	All derivative contracts are over-the-counter contracts.
[2]	Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement.
[3]	Represents netting of derivative asset and liability balances, and related cash collateral, with the same counterparty subject to master netting agreements. Refer to Note 14 for additional information regarding master netting agreements.
[4]	Collateralization is determined at the counterparty level. If overcollateralization exists, the amount shown is limited to the fair value of the financial instrument.
[5]	Financial instruments are disclosed at fair value. Financial instrument collateral is allocated pro-rata amongst the derivative liabilities to which it relates.

Commitments, Guarantees, And 84

Commitments, Guarantees, And Contingent Liabilities (Contractual Or Notional Amounts Of Financial Instruments) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Commitments Guarantees And Contingent Liabilities [Line Items]
Commitments to extend credit	[1]	$ 5,903,743	$ 5,674,753
Letters of credit	[1]	416,527	377,566
Covered loan commitments		9,600	11,000
Financial standby [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Letters of credit	[1]	370,300	334,175
Performance standby [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Letters of credit	[1]	40,067	38,167
Commercial letters of credit [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Letters of credit	[1]	6,160	5,224
Home equity lines [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Commitments to extend credit	[1]	135,799	129,943
Residential 1-4 family construction [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Commitments to extend credit	[1]	38,412	53,847
Commercial real estate, other construction and land development [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Commitments to extend credit	[1]	1,275,564	1,123,123
Commercial and industrial [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Commitments to extend credit	[1]	3,948,742	4,031,217
All other commitments [Member]
Commitments Guarantees And Contingent Liabilities [Line Items]
Commitments to extend credit	[1]	$ 505,226	$ 336,623
[1]	Includes covered loan commitments of $9.6 million and $11.0 million as of September 30, 2015, and December 31, 2014, respectively.

Commitments, Guarantees, And 85

Commitments, Guarantees, And Contingent Liabilities (Narrative) (Detail) - USD ($)		9 Months Ended
		Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Disclosure Commitments Guarantees And Contingent Liabilities Narrative [Abstract]
Reserve For Unfunded Commitments	[1]	$ 15,209,000	$ 13,157,000	$ 12,274,000	$ 9,844,000	$ 9,363,000	$ 9,206,000
Unamortized fees associated with standby letters of credit		$ 2,200,000
Remaining weighted-average term, standby letters of credit		15 months
Remaining actual lives, standby letters of credit, minimum		1 year
Remaining actual lives, standby letters of credit, maximum		5 years
Unfunded commitments for contributions to CRA investments and other investment partnerships		$ 37,800,000		$ 21,600,000
Unfunded commitments for tax-credit investments		17,200,000
Maximum potential future payments guarantee obligation, credit card settlement guarantees		17,000,000
Contingency liability, settlement guarantee program		$ 0
[1]	Unfunded commitments include commitments to extend credit, standby letters of credit and commercial letters of credit. Unfunded commitments related to covered assets are excluded as they are covered under a loss sharing agreement with the FDIC.

Estimated Fair Value Of Finan86

Estimated Fair Value Of Financial Instruments (Narrative) (Detail) - USD ($)		9 Months Ended	12 Months Ended
		Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Appraisal value to be reviewed		$ 250,000
Appraisal value subject to technical review		1,000,000
Transfers of Assets and Liabilities Between Fair Value Hierarchy Level 1 and Level 2		0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		0
Loans Held-for-sale, Other	[1]	52,160,000	$ 72,946,000
Participating Mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Other		$ 52,200,000	36,600,000
Branch Closing, Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Other			$ 36,300,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Changes in Valuation Techniques		0	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Changes in Valuation Techniques		no
[1]	Amounts at September 30, 2015, represent commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value. Generally, the Company intends to sell these loans within 30-60 days from the date the intent to sell was established. Amounts at December 31, 2014, consist of $36.6 million of commercial, commercial real estate and construction loans carried at the lower of aggregate cost or fair value and $36.3 million of commercial, commercial real estate, construction, home equity and personal loans held-for-sale in connection with the sale of the Company's banking office located in Norcross, Georgia, which closed in January 2015.

Estimated Fair Value Of Finan87

Estimated Fair Value Of Financial Instruments (Fair Value Measurements On A Recurring Basis) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		$ 1,703,926	$ 1,645,344
Mortgages loans held-for-sale		24,065	42,215
Interest rate contract derivatives designated as hedging instruments		12,451	4,542
Other derivative assets, not designated as hedging instruments		65,664	49,108
Netting adjustments	[1],[2],[3]	(18,137)	(10,588)
Derivative assets	[1]	59,978	43,062
Total assets		1,787,969	1,730,621
Interest rate contract derivatives designated as hedging instruments		0	2,715
Netting adjustments	[1],[2],[3]	(45,238)	(25,269)
Derivative liabilities	[1]	21,967	26,767
Fair Value, Inputs, Level 1 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		269,734	268,265
Mortgages loans held-for-sale		0	0
Derivative assets		0	0
Total assets		269,734	268,265
Derivative liabilities		0	0
Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		1,433,221	1,377,079
Mortgages loans held-for-sale		24,065	42,215
Interest rate contract derivatives designated as hedging instruments		12,451	4,542
Netting adjustments		(18,007)	(9,952)
Derivative assets		58,963	41,500
Total assets		1,516,249	1,460,794
Interest rate contract derivatives designated as hedging instruments		0	2,715
Netting adjustments		(45,113)	(24,633)
Derivative liabilities		21,680	25,926
Fair Value, Inputs, Level 3 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		971	0
Mortgages loans held-for-sale		0	0
Netting adjustments		(130)	(636)
Derivative assets		1,015	1,562
Total assets		1,986	1,562
Netting adjustments		(125)	(636)
Derivative liabilities		287	841
U.S. Treasury [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		269,734	268,265
U.S. Treasury [Member] | Fair Value, Inputs, Level 1 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		269,734	268,265
U.S. Agency [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		46,735	46,258
U.S. Agency [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		46,735	46,258
Collateralized mortgage obligations [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		108,385	136,933
Collateralized mortgage obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		108,385	136,933
Residential mortgage-backed securities [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		825,595	846,078
Residential mortgage-backed securities [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		825,595	846,078
State and municipal securities [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		453,477	347,310
State and municipal securities [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		452,506	347,310
State and municipal securities [Member] | Fair Value, Inputs, Level 3 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		971
Foreign sovereign debt [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		0	500
Foreign sovereign debt [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Securities available-for-sale, at fair value		0	500
Client-Related Derivatives [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Other derivative assets, not designated as hedging instruments		65,254	48,081
Other derivatives liabilities, not designated as hedging instruments		66,786	48,475
Client-Related Derivatives [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Other derivative assets, not designated as hedging instruments		64,335	46,669
Other derivatives liabilities, not designated as hedging instruments		66,609	47,799
Client-Related Derivatives [Member] | Fair Value, Inputs, Level 3 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Other derivative assets, not designated as hedging instruments		919	1,412
Other derivatives liabilities, not designated as hedging instruments		177	676
Other End-User Derivatives [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Other derivative assets, not designated as hedging instruments		410	1,027
Other derivatives liabilities, not designated as hedging instruments		419	846
Other End-User Derivatives [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Other derivative assets, not designated as hedging instruments		184	241
Other derivatives liabilities, not designated as hedging instruments		184	45
Other End-User Derivatives [Member] | Fair Value, Inputs, Level 3 [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Other derivative assets, not designated as hedging instruments		226	786
Other derivatives liabilities, not designated as hedging instruments		$ 235	$ 801
[1]	All derivative contracts are over-the-counter contracts.
[2]	Represents financial instrument and related cash collateral entered into with the same counterparty and subject to a master netting agreement.
[3]	Represents netting of derivative asset and liability balances, and related cash collateral, with the same counterparty subject to master netting agreements. Refer to Note 14 for additional information regarding master netting agreements.

Estimated Fair Value Of Finan88

Estimated Fair Value Of Financial Instruments (Reconciliation Of Beginning And Ending Fair Value For Those Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Financial Instruments, Assets [Member]
Estimated Fair Value of Financial Instruments [Roll Forward]
Balance at beginning of period, derivative assets	[1]	$ 1,081	$ 2,712	$ 2,198	$ 789
Total gains (losses) included in earnings, derivative assets	[1],[2]	479	(71)	237	155
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances	[1]	297	84	802	496
Settlements, derivative assets	[1]	(976)	(492)	(2,339)	(1,672)
Transfers into Level 3 (out of Level 2) derivative assets	[1],[3]	265	56	1,433	2,635
Transfers out of Level 3 (into Level 2), derivative assets	[1],[3]	(1)	(335)	(1,186)	(449)
Balance at end of period, derivative assets	[1]	1,145	1,954	1,145	1,954
Change in unrealized gains (losses) in earnings relating to assets and liabilities still held at end of year	[1]	176	30	429	127
Derivative Financial Instruments, Liabilities [Member]
Estimated Fair Value of Financial Instruments [Roll Forward]
Balance at beginning of period, derivative liabilities	[1]	(295)	(1,474)	(1,477)	(201)
Total gains (losses) included in earnings, derivative liabilities	[1],[2]	(406)	216	(107)	759
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances	[1]	0	0	0	0
Settlements, derivative liabilities	[1]	289	387	873	(35)
Transfers into Level 3 (out of Level 2) derivative liabilities	[1],[3]	0	0	(160)	(1,394)
Transfers out of Level 3 (into Level 2) derivative liabilities	[1],[3]	0	197	459	197
Balance at end of period, derivative liabilities	[1]	(412)	(674)	(412)	(674)
Change in unrealized gains (losses) in earnings relating to assets and liabilities still held at end of year	[1]	109	$ 131	147	$ 959
Available-for-sale Securities [Member]
Estimated Fair Value of Financial Instruments [Roll Forward]
Transfers into Level 3 (out of Level 2) derivative assets	[1],[3]	971		971
Balance at end of period, derivative assets	[1]	$ 971		$ 971
[1]	Fair value is presented prior to giving effect to netting adjustments.
[2]	Amounts disclosed in this line are included in the Consolidated Statements of Income as capital markets products income for derivatives and mortgage banking income for interest rate lock commitments.
[3]	Transfers in and transfers out are recognized at the end of each quarterly reporting period. Investment securities transferred into Level 3 from Level 2 relate to a reclassification of certain municipal bonds. In general, derivative assets and liabilities are transferred into Level 3 from Level 2 due to a lack of observable market data, as there was deterioration in the credit risk of the derivative counterparty. Conversely, derivative assets and liabilities are transferred out of Level 3 into Level 2 due to an improvement in the credit risk of the derivative counterparty.

Estimated Fair Value Of Finan89

Estimated Fair Value Of Financial Instruments (Summary Of The Difference Between The Aggregate Fair Value And Remaining Principle Balance In Mortgage Loans Held For Sale) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Estimated Fair Value Of Financial Instruments [Line Items]
Mortgages loans held-for-sale, aggregate fair value		$ 24,065	$ 42,215
Mortgage Receivable [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Mortgage loans held-for-sale, aggregate unpaid principal balance		23,957	42,199
Assets Held-for-sale [Member] | Mortgage Receivable [Member]
Estimated Fair Value Of Financial Instruments [Line Items]
Mortgage loans held-for-sale, difference	[1]	$ (108)	$ (16)
[1]	The change in fair value is reflected in mortgage banking non-interest income.

Estimated Fair Value Of Finan90

Estimated Fair Value Of Financial Instruments (Fair Value Measurements On A Nonrecurring Basis) (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
Estimated Fair Value Of Financial Instruments [Line Items]
Collateral-dependent impaired loans, Fair Value	[1]	$ 20,317	$ 36,048
OREO, Fair Value	[2]	8,423	11,704
Total, Fair Value		28,740	47,752
Collateral-dependent impaired loans, (gains) losses	[1]	1,398	12,708
OREO, Losses	[2]	1,666	4,750
Total, (gains) losses		$ 3,064	$ 17,458
[1]	Represents the fair value of loans adjusted to the appraised value of the collateral with a write-down in fair value or change in specific reserves during the respective period. These fair value adjustments are recorded against the allowance for loan losses.
[2]	Represents the fair value of foreclosed properties that were adjusted subsequent to their initial classification as foreclosed assets. Write-downs are recognized as a component of net foreclosed property expenses in the Consolidated Statements of Income.

Estimated Fair Value Of Finan91

Estimated Fair Value Of Financial Instruments (Quantitative Information Regarding Level 3 Fair Value Measurements) (Detail) - Fair Value, Inputs, Level 3 [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Investment securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 971
Investment securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range, Significant Unobservable Inputs	Ba1
Investment securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range, Significant Unobservable Inputs	Aa3
Investment securities [Member] | equivalent rating [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Input	Equivalent rating
Investment securities [Member] | Bond Pricing [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Techniques	Bond pricing
Watch List Derivatives [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 780
Watch List Derivatives [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	7.50%
Watch List Derivatives [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	17.30%
Watch List Derivatives [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	11.60%
Watch List Derivatives [Member] | Loss Factors [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Input	Loss factors
Watch List Derivatives [Member] | Discounted Cash Flow [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Techniques	Discounted cash flow
Risk Participation Agreements [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ (38)	[1]
Risk Participation Agreements [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	1.00%
Risk Participation Agreements [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	17.30%
Risk Participation Agreements [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	8.60%
Risk Participation Agreements [Member] | Loss Factors [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Input	Loss factors
Risk Participation Agreements [Member] | Discounted Cash Flow [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Techniques	Discounted cash flow
Interest Rate Lock Commitments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 313	[1]
Interest Rate Lock Commitments [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	64.80%
Interest Rate Lock Commitments [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	100.00%
Interest Rate Lock Commitments [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	81.20%
Interest Rate Lock Commitments [Member] | Pull-through Rate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Input	Pull-through rate
Interest Rate Lock Commitments [Member] | Discounted Cash Flow [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Techniques	Discounted cash flow
Collateral Dependent Impaired Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 20,317
Collateral Dependent Impaired Loans [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	(0.20%)
Collateral Dependent Impaired Loans [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	(27.80%)
Collateral Dependent Impaired Loans [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	(8.40%)	[2]
Collateral Dependent Impaired Loans [Member] | Property Specific Adjustment [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Input	Property specific adjustment
Collateral Dependent Impaired Loans [Member] | Sales Comparison, Income Capitalization And/Or Cost Approach [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Techniques	Sales comparison, income capitalization and/or cost approach
Other Real Estate Owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 8,423
Other Real Estate Owned [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	(1.00%)
Other Real Estate Owned [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	(18.80%)
Other Real Estate Owned [Member] | Weighted Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range Of Inputs Significant Unobservable Inputs	(6.80%)	[2]
Other Real Estate Owned [Member] | Property Specific Adjustment [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Input	Property specific adjustment
Other Real Estate Owned [Member] | Sales Comparison, Income Capitalization And/Or Cost Approach [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Techniques	Sales comparison, income capitalization and/or cost approach
[1]	Represents fair value of underlying swap.
[2]	Weighted average is calculated based on assets with a property specific adjustment.

Estimated Fair Value Of Finan92

Estimated Fair Value Of Financial Instruments (Financial Instruments) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Financial assets: [Abstract]
Cash and due from banks		$ 145,477	$ 132,211
Federal funds sold and interest-bearing deposits in banks		231,600	292,341
Loans held-for-sale		76,225	115,161
Securities available-for-sale, at fair value		1,703,926	1,645,344
Securities Held-to-Maturity, Amortized Cost		1,293,433	1,129,285
Securities held-to-maturity, at fair value		1,304,477	1,132,615
Federal Home Loan Bank Stock		30,740	28,666
Loans, net of allowance for loan losses and unearned fees		12,916,446	11,739,721
Covered assets, net of allowance for covered loan losses		22,222	28,941
Accrued interest receivable		43,064	40,531
Investment in BOLI		56,292	55,207
Derivative assets	[1]	59,978	43,062
Community development investments		3,967	4,854
Financial liabilities: [Abstract]
Deposits		13,897,739	13,089,968
Deposits held-for-sale		0	122,216
Short-term borrowings		514,121	432,385
Long-term debt		694,788	344,788
Accrued interest payable		6,509	6,948
Derivative liabilities	[1]	21,967	26,767
Estimate of Fair Value Measurement [Member]
Financial assets: [Abstract]
Cash and due from banks		145,477	132,211
Federal funds sold and interest-bearing deposits in banks		231,600	292,341
Loans held-for-sale		76,225	115,161
Securities available-for-sale, at fair value		1,703,926	1,645,344
Securities held-to-maturity, at fair value		1,304,477	1,132,615
Federal Home Loan Bank Stock		30,740	28,666
Loans, net of allowance for loan losses and unearned fees, fair value		12,837,378	11,736,461
Covered assets, net of allowance for covered loan losses, fair value		28,386	33,988
Accrued interest receivable		43,064	40,531
Investment in BOLI		56,292	55,207
Derivative assets		59,978	43,062
Community development investments		6,322	6,060
Financial liabilities: [Abstract]
Deposits, fair value		13,910,827	13,095,657
Deposits held-for-sale, fair value			117,572
Short-term borrowings, fair value		514,141	430,944
Long-term debt, fair value		665,771	332,374
Accrued interest payable		6,509	6,948
Derivative liabilities		21,967	26,767
Fair Value, Inputs, Level 1 [Member]
Financial assets: [Abstract]
Cash and due from banks		145,477	132,211
Federal funds sold and interest-bearing deposits in banks		0	0
Loans held-for-sale		0	0
Securities available-for-sale, at fair value		269,734	268,265
Securities held-to-maturity, at fair value		0	0
Federal Home Loan Bank Stock, fair value		0	0
Loans, net of allowance for loan losses and unearned fees, fair value		0	0
Covered assets, net of allowance for covered loan losses, fair value		0	0
Accrued interest receivable		0	0
Investment in BOLI		0	0
Derivative assets		0	0
Financial liabilities: [Abstract]
Deposits, fair value		0	0
Short-term borrowings, fair value		0	0
Long-term debt, fair value		207,293	204,320
Accrued interest payable		0	0
Derivative liabilities		0	0
Fair Value, Inputs, Level 2 [Member]
Financial assets: [Abstract]
Cash and due from banks		0	0
Federal funds sold and interest-bearing deposits in banks		231,600	292,341
Loans held-for-sale		76,225	115,161
Securities available-for-sale, at fair value		1,433,221	1,377,079
Securities held-to-maturity, at fair value		1,304,477	1,132,615
Federal Home Loan Bank Stock		30,740	28,666
Loans, net of allowance for loan losses and unearned fees, fair value		0	0
Covered assets, net of allowance for covered loan losses, fair value		0	0
Accrued interest receivable		0	0
Investment in BOLI		0	0
Derivative assets		58,963	41,500
Community development investments		6,322	6,060
Financial liabilities: [Abstract]
Deposits, fair value		11,582,503	10,595,040
Deposits held-for-sale, fair value			117,572
Short-term borrowings, fair value		509,985	427,150
Long-term debt, fair value		400,132	54,092
Accrued interest payable		0	0
Derivative liabilities		21,680	25,926
Fair Value, Inputs, Level 3 [Member]
Financial assets: [Abstract]
Cash and due from banks		0	0
Federal funds sold and interest-bearing deposits in banks		0	0
Loans held-for-sale		0	0
Securities available-for-sale, at fair value		971	0
Securities held-to-maturity, at fair value		0	0
Federal Home Loan Bank Stock, fair value		0	0
Loans, net of allowance for loan losses and unearned fees, fair value		12,837,378	11,736,461
Covered assets, net of allowance for covered loan losses, fair value		28,386	33,988
Accrued interest receivable		43,064	40,531
Investment in BOLI		56,292	55,207
Derivative assets		1,015	1,562
Financial liabilities: [Abstract]
Deposits, fair value		2,328,324	2,500,617
Short-term borrowings, fair value		4,156	3,794
Long-term debt, fair value		58,346	73,962
Accrued interest payable		6,509	6,948
Derivative liabilities		$ 287	$ 841
[1]	All derivative contracts are over-the-counter contracts.

Operating Segments (Operating S

Operating Segments (Operating Segments Performance) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net interest income (loss)		$ 131,209	$ 116,758	$ 377,824	$ 337,861
Provision for loan and covered loan losses		4,197	3,890	11,959	7,924
Non-interest income		30,789	30,669	97,364	87,164
Non-interest expense		85,175	77,836	250,217	229,051
Income (loss) before income taxes		72,626	65,701	213,012	188,050
Income tax provision (benefit)		27,358	25,174	79,838	72,194
Net income (loss)		45,268	40,527	133,174	115,856
Assets		16,894,605		16,894,605		$ 15,603,382
Total loans		13,079,314	11,547,587	13,079,314	11,547,587	11,892,219
Deposits, excluding deposits held-for-sale		13,897,739		13,897,739		13,089,968
Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (loss)		135,733	123,208	391,352	357,115
Provision for loan and covered loan losses		4,197	3,890	11,959	7,924
Non-interest income		26,311	26,414	83,722	74,090
Non-interest expense		78,274	71,194	228,965	208,374
Income (loss) before income taxes		79,573	74,538	234,150	214,907
Income tax provision (benefit)		29,806	28,432	87,694	82,415
Net income (loss)		49,767	46,106	146,456	132,492
Assets		15,003,875		15,003,875		13,882,805
Total loans		13,079,314		13,079,314		11,892,219
Deposits, excluding deposits held-for-sale		13,955,153		13,955,153		13,150,600
Asset Management [Member]
Segment Reporting Information [Line Items]
Net interest income (loss)		1,142	781	3,145	2,555
Provision for loan and covered loan losses		0	0	0	0
Non-interest income		4,462	4,240	13,596	13,029
Non-interest expense		4,063	4,108	12,888	12,516
Income (loss) before income taxes		1,541	913	3,853	3,068
Income tax provision (benefit)		599	359	1,497	1,208
Net income (loss)		942	554	2,356	1,860
Holding Company And Other Adjustments [Member]
Segment Reporting Information [Line Items]
Net interest income (loss)		(5,666)	(7,231)	(16,673)	(21,809)
Provision for loan and covered loan losses		0	0	0	0
Non-interest income		16	15	46	45
Non-interest expense		2,838	2,534	8,364	8,161
Income (loss) before income taxes		(8,488)	(9,750)	(24,991)	(29,925)
Income tax provision (benefit)		(3,047)	(3,617)	(9,353)	(11,429)
Net income (loss)		(5,441)	$ (6,133)	(15,638)	$ (18,496)
Assets	[1]	1,890,730		1,890,730		1,720,577
Total loans		0		0		0
Deposits, excluding deposits held-for-sale	[1]	$ (57,414)		$ (57,414)		$ (60,632)
[1]	Deposit amounts represent the elimination of Holding Company cash accounts included in total deposits of the Banking segment.

Variable Interest Entities (Non

Variable Interest Entities (Nonconsolidated Variable Interest Entities) (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Carrying Amount		$ 234,749	$ 240,057
Maximum Exposure to Loss		87,712	80,369
Trust Preferred Capital Securities Issuances [Member]
Variable Interest Entity [Line Items]
Carrying Amount		169,788	169,788
Maximum Exposure to Loss		0	0
Community Reinvestment Investments [Member]
Variable Interest Entity [Line Items]
Carrying Amount		21,809	14,360
Maximum Exposure to Loss		35,682	16,054
Restructured loans to commercial clients, outstanding loan balance [Member]
Variable Interest Entity [Line Items]
Carrying Amount	[1]	43,139	49,376
Maximum Exposure to Loss	[1]	52,017	57,782
Restructured loans to commercial clients, related derivative asset [Member]
Variable Interest Entity [Line Items]
Carrying Amount	[1]	13	6,533
Maximum Exposure to Loss	[1]	$ 13	$ 6,533
[1]	Excludes personal loans and loans to non-for-profit entities.

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Investment Holdings [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	100.00%	100.00%
Affordable Housing Tax Credits Commitment, Year to be Paid Through	2,030
Amortization Method Qualified Affordable Housing Project Investments	$ 19,200,000		$ 10,000,000
Amortization Method Qualified Affordable Housing Project Investments, Amortization	481,000	$ 354,000
Tax Credit Investment Unfunded Commitments	17,200,000
Tax Credit [Member]
Investment Holdings [Line Items]
Affordable Housing Tax Credits and Other Tax Benefits, Amount	470,000	328,000
Tax Benefit From Operating Losses [Member]
Investment Holdings [Line Items]
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 175,000	138,000
Low Income Housing Tax Credit Investment [Member]
Investment Holdings [Line Items]
Affordable Housing Tax Credits Commitment, Year to be Paid Through	2,028
Tax Credit Investments [Member]
Investment Holdings [Line Items]
Impairment Losses, Tax Credit Investments	$ 0	$ 0