Loans (Tables)

12 Months Ended

Dec. 31, 2013

Receivables [Abstract]

Loans

Year-end loans consisted of the following:

	2013			2012
Commercial and industrial:
Commercial	$	4,460,543		$	4,357,100
Leases	319,577			278,535
Asset-based	126,956			192,977
Total commercial and industrial	4,907,076			4,828,612
Commercial real estate:
Commercial mortgages	2,800,760			2,495,481
Construction	426,639			608,306
Land	239,937			216,008
Total commercial real estate	3,467,336			3,319,795
Consumer real estate:
Home equity loans	329,853			310,675
Home equity lines of credit	195,132			186,522
1-4 family residential mortgages	32,447			38,323
Construction	13,123			17,621
Other	237,649			224,206
Total consumer real estate	808,204			777,347
Total real estate	4,275,540			4,097,142
Consumer and other:
Consumer installment	350,827			311,310
Other	7,289			8,435
Total consumer and other	358,116			319,745
Unearned discounts	(25,032		)	(21,651		)
Total loans	$	9,515,700		$	9,223,848

Activities in Related Party Loans

Activity in related party loans during 2013 is presented in the following table.

Balance outstanding at December 31, 2012	$	65,246
Principal additions	123,189
Principal reductions	(111,763		)
Balance outstanding at December 31, 2013	$	76,672

Non-Accrual Loans, Segregated by Class of Loans

Year-end non-accrual loans, segregated by class of loans, were as follows:

	2013		2012
Commercial and industrial:
Energy	$	590	$	1,150
Other commercial	26,143		45,158
Commercial real estate:
Buildings, land and other	27,035		38,631
Construction	—		1,100
Consumer real estate	2,207		2,773
Consumer and other	745		932
Total	$	56,720	$	89,744

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 December 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	$	892	$	559	$	1,451	$	1,113,958		$	1,115,409		$	500
Other commercial	16,090		8,069		24,159		3,767,508			3,791,667			2,223
Commercial real estate:
Buildings, land and other	14,492		19,246		33,738		3,006,959			3,040,697			1,223
Construction	679		—		679		425,960			426,639			—
Consumer real estate	4,978		2,738		7,716		800,488			808,204			2,391
Consumer and other	4,076		1,468		5,544		352,572			358,116			1,298
Unearned discounts	—		—		—		(25,032		)	(25,032		)	—
Total	$	41,207	$	32,080	$	73,287	$	9,442,413		$	9,515,700		$	7,635

Impaired Loans

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

	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
2013
Commercial and industrial:
Energy	$	545	$	531	$	—	$	531	$	—	$	428
Other commercial	31,429		15,337		7,004		22,341		4,140		34,894
Commercial real estate:
Buildings, land and other	27,792		15,697		8,870		24,567		2,786		34,633
Construction	—		—		—		—		—		634
Consumer real estate	907		745		—		745		—		804
Consumer and other	334		278		—		278		—		348
Total	$	61,007	$	32,588	$	15,874	$	48,462	$	6,926	$	71,741
2012
Commercial and industrial:
Energy	$	1,255	$	—	$	1,069	$	1,069	$	900	$	214
Other commercial	56,784		21,709		19,096		40,805		4,200		42,630
Commercial real estate:
Buildings, land and other	44,652		19,010		17,149		36,159		3,137		40,258
Construction	1,497		1,100		—		1,100		—		1,392
Consumer real estate	961		864		—		864		—		1,617
Consumer and other	428		400		—		400		—		469
Total	$	105,577	$	43,083	$	37,314	$	80,397	$	8,237	$	86,580

Troubled Debt Restructurings

Troubled debt restructurings during 2013, 2012 and 2011are set forth in the following table.

	2013				2012				2011
	Balance at Restructure		Balance at Year-end		Balance at Restructure		Balance at Year-end		Balance at Restructure		Balance at Year-end
Commercial and industrial:
Energy	$	528	$	531	$	—	$	—	$	—	$	—
Other commercial	6,334		4,937		1,602		1,478		191		179
Commercial real estate:
Buildings, land and other	7,964		5,747		714		710		7,519		6,183
Consumer real estate	—		—		—		—		969		932
Consumer	7		—		—		—		469		456
	$	14,833	$	11,215	$	2,316	$	2,188	$	9,148	$	7,750

Weighted Average Risk Grades for All Commercial Loans by Class

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

	December 31, 2013			December 31, 2012
	Weighted Average Risk Grade	Loans		Weighted Average Risk Grade	Loans
Commercial and industrial:
Energy
Risk grades 1-8	5.37	$	1,106,348	5.24	$	1,081,725
Risk grade 9	9.00	7,726		9.00	392
Risk grade 10	10.00	245		10.00	—
Risk grade 11	11.00	500		11.00	—
Risk grade 12	12.00	590		12.00	169
Risk grade 13	13.00	—		13.00	900
Total energy	5.40	$	1,115,409	5.25	$	1,083,186
Other commercial
Risk grades 1-8	5.95	$	3,507,963	5.81	$	3,367,443
Risk grade 9	9.00	74,766		9.00	250,508
Risk grade 10	10.00	89,878		10.00	28,440
Risk grade 11	11.00	92,917		11.00	53,797
Risk grade 12	12.00	21,389		12.00	40,603
Risk grade 13	13.00	4,754		13.00	4,635
Total other commercial	6.27	$	3,791,667	6.21	$	3,745,426
Commercial real estate:
Buildings, land and other
Risk grades 1-8	6.59	$	2,844,665	6.63	$	2,460,448
Risk grade 9	9.00	65,770		9.00	92,041
Risk grade 10	10.00	49,881		10.00	42,603
Risk grade 11	11.00	53,208		11.00	77,658
Risk grade 12	12.00	24,387		12.00	35,602
Risk grade 13	13.00	2,786		13.00	3,137
Total commercial real estate	6.83	$	3,040,697	6.97	$	2,711,489
Construction
Risk grades 1-8	7.05	$	418,999	6.82	$	579,108
Risk grade 9	9.00	1,301		9.00	23,046
Risk grade 10	10.00	5,931		10.00	4,435
Risk grade 11	11.00	408		11.00	617
Risk grade 12	12.00	—		12.00	1,100
Risk grade 13	13.00	—		13.00	—
Total construction	7.10	$	426,639	6.94	$	608,306

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

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

	2013			2012			2011
Commercial and industrial:
Energy	$	(913	)	$	4		$	6
Other commercial	(28,431		)	(13,627		)	(29,158		)
Commercial real estate:
Buildings, land and other	(381		)	698			(8,980		)
Construction	256			78			(454		)
Consumer real estate	(719		)	(638		)	(2,293		)
Consumer and other	(2,409		)	(2,289		)	(2,735		)
Total	$	(32,597	)	$	(15,774	)	$	(43,614	)

Unallocated Portion of the Allowance for Loan Losses

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

	Commercial and Industrial			Commercial Real Estate			Consumer Real Estate			Consumer and Other			Unallocated		Total
December 31, 2013
Historical valuation allowances	$	29,357		$	13,042		$	2,644		$	8,695		$	—	$	53,738
Specific valuation allowances	4,140			2,786			—			—			—		6,926
General valuation allowances:
Environmental risk adjustment	5,497			3,314			664			2,331			—		11,806
Distressed industries	7,812			384			—			—			—		8,196
Excessive industry concentrations	1,499			367			—			—			—		1,866
Large relationship concentrations	1,529			1,081			—			—			—		2,610
Highly-leveraged credit relationships	4,535			619			—			—			—		5,154
Policy exceptions	—			—			—			—			2,492		2,492
Credit and collateral exceptions	—			—			—			—			1,398		1,398
Loans not reviewed by concurrence	2,009			2,201			2,250			1,064			—		7,524
Adjustment for recoveries	(3,588		)	(1,204		)	(328		)	(7,080		)	—		(12,200		)
General macroeconomic risk	—			—			—			—			2,928		2,928
Total	$	52,790		$	22,590		$	5,230		$	5,010		$	6,818	$	92,438
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 2013, 2012 and 2011. 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 Industrial			Commercial Real Estate			Consumer Real Estate			Consumer and Other			Unallocated			Total
2013
Beginning balance	$	54,164		$	29,346		$	5,252		$	3,507		$	12,184		$	104,453
Provision for loan losses	27,970			(6,631		)	697			3,912			(5,366		)	20,582
Charge-offs	(32,932		)	(1,329		)	(1,047		)	(9,489		)	—			(44,797		)
Recoveries	3,588			1,204			328			7,080			—			12,200
Net charge-offs	(29,344		)	(125		)	(719		)	(2,409		)	—			(32,597		)
Ending balance	$	52,790		$	22,590		$	5,230		$	5,010		$	6,818		$	92,438
Period-end amount allocated to:
Loans individually evaluated for impairment	$	16,682		$	3,914		$	—		$	—		$	—		$	20,596
Loans collectively evaluated for impairment	36,108			18,676			5,230			5,010			6,818			71,842
Ending balance	$	52,790		$	22,590		$	5,230		$	5,010		$	6,818		$	92,438
2012
Beginning balance	$	42,774		$	20,912		$	3,540		$	12,635		$	30,286		$	110,147
Provision for loan losses	25,013			7,658			2,350			(6,839		)	(18,102		)	10,080
Charge-offs	(18,493		)	(3,951		)	(1,495		)	(9,101		)	—			(33,040		)
Recoveries	4,870			4,727			857			6,812			—			17,266
Net charge-offs	(13,623		)	776			(638		)	(2,289		)	—			(15,774		)
Ending balance	$	54,164		$	29,346		$	5,252		$	3,507		$	12,184		$	104,453
Period-end amount allocated to:
Loans individually evaluated for impairment	$	13,171		$	4,366		$	—		$	—		$	—		$	17,537
Loans collectively evaluated for impairment	40,993			24,980			5,252			3,507			12,184			86,916
Ending balance	$	54,164		$	29,346		$	5,252		$	3,507		$	12,184		$	104,453
2011
Beginning balance	$	57,789		$	28,534		$	3,223		$	11,974		$	24,796		$	126,316
Provision for loan losses	14,137			1,812			2,610			3,396			5,490			27,445
Charge-offs	(33,678		)	(10,776		)	(2,789		)	(9,442		)	—			(56,685		)
Recoveries	4,526			1,342			496			6,707			—			13,071
Net charge-offs	(29,152		)	(9,434		)	(2,293		)	(2,735		)	—			(43,614		)
Ending balance	$	42,774		$	20,912		$	3,540		$	12,635		$	30,286		$	110,147
Period-end amount allocated to:
Loans individually evaluated for impairment	$	15,829		$	3,625		$	95		$	—		$	—		$	19,549
Loans collectively evaluated for impairment	26,945			17,287			3,445			12,635			30,286			90,598
Ending balance	$	42,774		$	20,912		$	3,540		$	12,635		$	30,286		$	110,147

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

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

	Commercial and Industrial		Commercial Real Estate		Consumer Real Estate		Consumer and Other		Unearned Discounts			Total
2013
Loans individually evaluated for impairment	$	210,273	$	136,601	$	745	$	278	$	—		$	347,897
Loans collectively evaluated for impairment	4,696,803		3,330,735		807,459		357,838		(25,032		)	9,167,803
Ending balance	$	4,907,076	$	3,467,336	$	808,204	$	358,116	$	(25,032	)	$	9,515,700
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