Loans (Tables)

3 Months Ended

Mar. 31, 2013

Loans

Loans were as follows:

	March 31,			Percentage			December 31,			Percentage			March 31,			Percentage
	2013			of Total			2012			of Total			2012			of Total
Commercial and industrial:
Commercial	$	4,252,568			46.4	%	$	4,357,100			47.2	%	$	3,709,450			45.7	%
Leases		281,106			3.1			278,535			3.0			193,162			2.4
Asset-based		174,991			1.9			192,977			2.1			140,240			1.7
Total commercial and industrial		4,708,665			51.4			4,828,612			52.3			4,042,852			49.8
Commercial real estate:
Commercial mortgages		2,520,298			27.5			2,495,481			27.1			2,357,206			29.0
Construction		647,862			7.1			608,306			6.6			493,600			6.1
Land		223,349			2.4			216,008			2.3			184,078			2.2
Total commercial real estate		3,391,509			37.0			3,319,795			36.0			3,034,884			37.3
Consumer real estate:
Home equity loans		312,429			3.4			310,675			3.4			288,961			3.6
Home equity lines of credit		188,142			2.1			186,522			2.0			190,371			2.4
1-4 family residential mortgages		36,215			0.4			38,323			0.4			43,284			0.5
Construction		13,170			0.1			17,621			0.2			18,910			0.2
Other		221,700			2.4			224,206			2.4			219,760			2.7
Total consumer real estate		771,656			8.4			777,347			8.4			761,286			9.4
Total real estate		4,163,165			45.4			4,097,142			44.4			3,796,170			46.7
Consumer and other:
Consumer installment		303,751			3.3			311,310			3.4			296,057			3.6
Other		7,597			0.1			8,435			0.1			8,415			0.1
Total consumer and other		311,348			3.4			319,745			3.5			304,472			3.7
Unearned discounts		(20,827	)		(0.2	)		(21,651	)		(0.2	)		(16,781	)		(0.2	)
Total loans	$	9,162,351			100.0	%	$	9,223,848			100.0	%	$	8,126,713			100.0	%

Non-Accrual Loans, Segregated by Class of Loans

Non-accrual loans, segregated by class of loans, were as follows:

	March 31,		December 31,		March 31,
	2013		2012		2012
Commercial and industrial:
Energy	$	—	$	1,150	$	—
Other commercial		48,255		45,158		49,588
Commercial real estate:
Buildings, land and other		39,067		38,631		41,892
Construction		1,055		1,100		1,285
Consumer real estate		2,526		2,773		4,322
Consumer and other		741		932		783
Total	$	91,644	$	89,744	$	97,870

Age Analysis of Past Due Loans, Segregated by Class of Loans

An age analysis of past due loans (including both accruing and non-accruing loans), segregated by class of loans, as of March 31, 2013 was as follows:

	Loans 30-89  Days Past Due		Loans 90 or  More Days Past Due		Total Past Due Loans		Current Loans			Total Loans			Accruing Loans 90  or More Days Past Due
Commercial and industrial:
Energy	$	119	$	1,916	$	2,035	$	1,068,561		$	1,070,596		$	1,916
Other commercial		22,701		28,924		51,625		3,586,444			3,638,069			5,939
Commercial real estate:
Buildings, land and other		16,445		23,801		40,246		2,703,401			2,743,647			1,173
Construction		—		83		83		647,779			647,862			83
Consumer real estate		6,531		3,100		9,631		762,025			771,656			2,629
Consumer and other		3,578		212		3,790		307,558			311,348			170
Unearned discounts		—		—		—		(20,827	)		(20,827	)		—
Total	$	49,374	$	58,036	$	107,410	$	9,054,941		$	9,162,351		$	11,910

Impaired Loans

Impaired loans are set forth in the following table. No interest income was recognized on impaired loans subsequent to their classification as impaired.

	Unpaid		Recorded		Recorded						Average Recorded
	Contractual		Investment		Investment		Total				Investment
	Principal		With No		With		Recorded		Related		Quarter		Year
	Balance		Allowance		Allowance		Investment		Allowance		To Date		To Date
March 31, 2013
Commercial and industrial:
Energy	$	—	$	—	$	—	$	—	$	—	$	535	$	535
Other commercial		75,350		25,880		18,218		44,098		5,340		42,452		42,452
Commercial real estate:
Buildings, land and other		45,158		18,740		17,777		36,517		3,290		36,338		36,338
Construction		1,479		1,055		—		1,055		—		1,078		1,078
Consumer real estate		947		834		—		834		—		849		849
Consumer and other		417		384		—		384		—		392		392
Total	$	123,351	$	46,893	$	35,995	$	82,888	$	8,630	$	81,644	$	81,644
December 31, 2012
Commercial and industrial:
Energy	$	1,255	$	—	$	1,069	$	1,069	$	900	$	535	$	214
Other commercial		56,784		21,709		19,096		40,805		4,200		44,941		42,630
Commercial real estate:
Buildings, land and other		44,652		19,010		17,149		36,159		3,137		41,126		40,258
Construction		1,497		1,100		—		1,100		—		1,122		1,392
Consumer real estate		961		864		—		864		—		879		1,617
Consumer and other		428		400		—		400		—		410		469
Total	$	105,577	$	43,083	$	37,314	$	80,397	$	8,237	$	89,013	$	86,580
March 31, 2012
Commercial and industrial:
Energy	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other commercial		55,632		28,932		15,804		44,736		5,356		42,034		42,034
Commercial real estate:
Buildings, land and other		47,077		36,821		2,243		39,064		1,113		39,996		39,996
Construction		1,551		1,237		—		1,237		—		1,259		1,259
Consumer real estate		2,623		1,826		751		2,577		95		2,524		2,524
Consumer and other		547		535		—		535		—		544		544
Total	$	107,430	$	69,351	$	18,798	$	88,149	$	6,564	$	86,357	$	86,357

Troubled Debt Restructurings

Troubled debt restructurings during the three months ended March 31, 2013 are set forth in the following table. Amounts represent the aggregate balance of the loans as of their individual restructuring dates. There were no troubled debt restructurings during the three months ended March 31, 2012.

Commercial and industrial:
Other commercial	$	275
Commercial real estate:
Buildings, land and other		1,680
	$	1,955

Weighted Average Risk Grades for All Commercial Loans by Class

The following table presents weighted average risk grades for all commercial loans by class.

	March 31, 2013				December 31, 2012				March 31, 2012
	Weighted				Weighted				Weighted
	Average				Average				Average
	Risk Grade		Loans		Risk Grade		Loans		Risk Grade		Loans
Commercial and industrial:
Energy
Risk grades 1-8		5.30	$	1,067,466		5.24	$	1,081,725		5.37	$	992,463
Risk grade 9		9.00		2,745		9.00		392		9.00		2,516
Risk grade 10		10.00		—		10.00		—		10.00		—
Risk grade 11		11.00		385		11.00		—		11.00		—
Risk grade 12		12.00		—		12.00		169		12.00		—
Risk grade 13		13.00		—		13.00		900		13.00		—
Total energy		5.31	$	1,070,596		5.25	$	1,083,186		5.38	$	994,979
Other commercial
Risk grades 1-8		5.89	$	3,367,114		5.81	$	3,367,443		6.20	$	2,803,976
Risk grade 9		9.00		122,482		9.00		250,508		9.00		65,376
Risk grade 10		10.00		33,818		10.00		28,440		10.00		35,504
Risk grade 11		11.00		66,400		11.00		53,797		11.00		93,415
Risk grade 12		12.00		42,230		12.00		40,603		12.00		44,520
Risk grade 13		13.00		6,025		13.00		4,635		13.00		5,082
Total other commercial		6.21	$	3,638,069		6.21	$	3,745,426		6.55	$	3,047,873
Commercial real estate:
Buildings, land and other
Risk grades 1-8		6.63	$	2,502,845		6.63	$	2,460,448		6.67	$	2,233,155
Risk grade 9		9.00		86,783		9.00		92,041		9.00		104,727
Risk grade 10		10.00		34,120		10.00		42,603		10.00		33,641
Risk grade 11		11.00		80,729		11.00		77,658		11.00		127,869
Risk grade 12		12.00		35,880		12.00		35,602		12.00		40,486
Risk grade 13		13.00		3,290		13.00		3,137		13.00		1,406
Total commercial real estate		6.95	$	2,743,647		6.97	$	2,711,489		7.12	$	2,541,284
Construction
Risk grades 1-8		6.81	$	618,852		6.82	$	579,108		6.97	$	454,674
Risk grade 9		9.00		24,378		9.00		23,046		9.00		16,062
Risk grade 10		10.00		2,968		10.00		4,435		10.00		15,442
Risk grade 11		11.00		609		11.00		617		11.00		6,137
Risk grade 12		12.00		1,055		12.00		1,100		12.00		1,285
Risk grade 13		13.00		—		13.00		—		13.00		—
Total construction		6.92	$	647,862		6.94	$	608,306		7.19	$	493,600

Net (Charge-Offs)/Recoveries, Segregated by Class of Loans

Net (charge-offs)/recoveries, segregated by class of loans, were as follows:

	Three Months Ended March 31,
	2013			2012
Commercial and industrial:
Energy	$	—		$	4
Other commercial		(16,527	)		(1,675	)
Commercial real estate:
Buildings, land and other		215			(2,360	)
Construction		114			10
Consumer real estate		(276	)		234
Consumer and other		(390	)		(279	)
Total	$	(16,864	)	$	(4,066	)

Unallocated Portion of Allowance for Loan Losses

The following table presents details of the allowance for loan losses, segregated by loan portfolio segment.

	Commercial
	and			Commercial			Consumer			Consumer
	Industrial			Real Estate			Real Estate			and Other			Unallocated		Total
March 31, 2013
Historical valuation allowances	$	25,233		$	12,873		$	2,553		$	7,555		$	—	$	48,214
Specific valuation allowances		5,340			3,290			—			—			—		8,630
General valuation allowances:
Environmental risk adjustment		4,980			3,194			631			2,027			—		10,832
Distressed industries		7,494			876			—			—			—		8,370
Excessive industry concentrations		3,815			2,042			—			—			—		5,857
Large relationship concentrations		1,288			927			—			—			—		2,215
Highly-leveraged credit relationships		3,418			727			—			—			—		4,145
Policy exceptions		—			—			—			—			2,197		2,197
Credit and collateral exceptions		—			—			—			—			2,152		2,152
Loans not reviewed by concurrence		2,052			2,213			2,207			1,035			—		7,507
Adjustment for recoveries		(2,535	)		(1,333	)		(243	)		(6,893	)		—		(11,004	)
General macroeconomic risk		—			—			—			—			4,474		4,474
Total	$	51,085		$	24,809		$	5,148		$	3,724		$	8,823	$	93,589
December 31, 2012
Historical valuation allowances	$	30,565		$	15,687		$	3,013		$	7,344		$	—	$	56,609
Specific valuation allowances		5,100			3,137			—			—			—		8,237
General valuation allowances:
Environmental risk adjustment		6,593			3,682			684			1,816			—		12,775
Distressed industries		5,883			1,182			—			—			—		7,065
Excessive industry concentrations		4,291			2,795			—			—			—		7,086
Large relationship concentrations		1,420			981			—			—			—		2,401
Highly-leveraged credit relationships		2,905			699			—			—			—		3,604
Policy exceptions		—			—			—			—			2,466		2,466
Credit and collateral exceptions		—			—			—			—			1,635		1,635
Loans not reviewed by concurrence		2,277			2,413			2,411			1,159			—		8,260
Adjustment for recoveries		(4,870	)		(1,230	)		(856	)		(6,812	)		—		(13,768	)
General macroeconomic risk		—			—			—			—			8,083		8,083
Total	$	54,164		$	29,346		$	5,252		$	3,507		$	12,184	$	104,453

Activity in Allowance for Loan Losses by Portfolio Segment

The following table details activity in the allowance for loan losses by portfolio segment for the reported periods. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

	Commercial
	and			Commercial			Consumer			Consumer
	Industrial			Real Estate			Real Estate			and Other			Unallocated			Total
March 31, 2013
Beginning balance	$	54,164		$	29,346		$	5,252		$	3,507		$	12,184		$	104,453
Provision for loan losses		13,448			(4,866	)		172			607			(3,361	)		6,000
Charge-offs		(17,152	)		(266	)		(336	)		(2,177	)		—			(19,931	)
Recoveries		625			595			60			1,787			—			3,067
Net charge-offs		(16,527	)		329			(276	)		(390	)		—			(16,864	)
Ending balance	$	51,085		$	24,809		$	5,148		$	3,724		$	8,823		$	93,589
Period-end amount allocated to:
Loans individually evaluated for impairment	$	13,464		$	4,576		$	—		$	—		$	—		$	18,040
Loans collectively evaluated for impairment		37,621			20,233			5,148			3,724			8,823			75,549
Ending balance	$	51,085		$	24,809		$	5,148		$	3,724		$	8,823		$	93,589
March 31, 2012
Beginning balance	$	42,774		$	20,912		$	3,540		$	12,635		$	30,286		$	110,147
Provision for loan losses		4,766			1,441			(75	)		(3,641	)		(1,391	)		1,100
Charge-offs		(3,012	)		(2,842	)		(289	)		(1,985	)		—			(8,128	)
Recoveries		1,341			492			523			1,706			—			4,062
Net charge-offs		(1,671	)		(2,350	)		234			(279	)		—			(4,066	)
Ending balance	$	45,869		$	20,003		$	3,699		$	8,715		$	28,895		$	107,181
Period-end amount allocated to:
Loans individually evaluated for impairment	$	17,842		$	2,879		$	95		$	—		$	—		$	20,816
Loans collectively evaluated for impairment		28,027			17,124			3,604			8,715			28,895			86,365
Ending balance	$	45,869		$	20,003		$	3,699		$	8,715		$	28,895		$	107,181

Investment in Loans Related to Allowance for Loan Losses by Portfolio Segment Disaggregated Based on Impairment Methodology

The Corporation’s recorded investment in loans as of March 31, 2013, December 31, 2012 and March 31, 2012 related to each balance in the allowance for loan losses by portfolio segment and disaggregated on the basis of the Corporation’s impairment methodology was as follows:

	Commercial
	and		Commercial		Consumer		Consumer		Unearned
	Industrial		Real Estate		Real Estate		and Other		Discounts			Total
March 31, 2013
Loans individually evaluated for impairment	$	148,858	$	158,651	$	834	$	384	$	—		$	308,727
Loans collectively evaluated for impairment		4,559,807		3,232,858		770,822		310,964		(20,827	)		8,853,624
Ending balance	$	4,708,665	$	3,391,509	$	771,656	$	311,348	$	(20,827	)	$	9,162,351
December 31, 2012
Loans individually evaluated for impairment	$	128,544	$	165,152	$	864	$	400	$	—		$	294,960
Loans collectively evaluated for impairment		4,700,068		3,154,643		776,483		319,345		(21,651	)		8,928,888
Ending balance	$	4,828,612	$	3,319,795	$	777,347	$	319,745	$	(21,651	)	$	9,223,848
March 31, 2012
Loans individually evaluated for impairment	$	178,521	$	226,266	$	2,577	$	535	$	—		$	407,899
Loans collectively evaluated for impairment		3,864,331		2,808,618		758,709		303,937		(16,781	)		7,718,814
Ending balance	$	4,042,852	$	3,034,884	$	761,286	$	304,472	$	(16,781	)	$	8,126,713