Loans (Tables)

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Loans

Year-end loans consisted of the following:

	2014			2013
Commercial and industrial:
Commercial	$	5,429,206		$	4,587,499
Leases	338,537			319,577
Total commercial and industrial	5,767,743			4,907,076
Commercial real estate:
Commercial mortgages	3,080,202			2,800,760
Construction	629,988			426,639
Land	291,907			239,937
Total commercial real estate	4,002,097			3,467,336
Consumer real estate:
Home equity loans	342,725			329,853
Home equity lines of credit	220,128			195,132
Other	286,198			283,219
Total consumer real estate	849,051			808,204
Total real estate	4,851,148			4,275,540
Consumer and other:
Consumer installment	385,479			350,827
Other	8,122			7,289
Total consumer and other	393,601			358,116
Unearned discounts	(24,957		)	(25,032		)
Total loans	$	10,987,535		$	9,515,700

Activities in Related Party Loans

Activity in related party loans during 2014 is presented in the following table. Other changes were primarily related to changes in related-party status.

Balance outstanding at December 31, 2013	$	76,672
Principal additions	127,347
Principal reductions	(165,963		)
Other changes	644
Balance outstanding at December 31, 2014	$	38,700

Non-Accrual Loans, Segregated by Class of Loans

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

	2014		2013
Commercial and industrial:
Energy	$	636	$	590
Other commercial	34,108		26,143
Commercial real estate:
Buildings, land and other	19,639		27,035
Construction	2,792		—
Consumer real estate	2,212		2,207
Consumer and other	538		745
Total	$	59,925	$	56,720

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, 2014 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	$	7,278	$	—	$	7,278	$	1,766,667		$	1,773,945		$	—
Other commercial	16,350		33,998		50,348		3,943,450			3,993,798			14,254
Commercial real estate:
Buildings, land and other	6,535		11,308		17,843		3,354,266			3,372,109			3,333
Construction	5,081		1,327		6,408		623,580			629,988			1,042
Consumer real estate	4,560		2,148		6,708		842,343			849,051			1,910
Consumer and other	5,706		476		6,182		387,419			393,601			402
Unearned discounts	—		—		—		(24,957		)	(24,957		)	—
Total	$	45,510	$	49,257	$	94,767	$	10,892,768		$	10,987,535		$	20,941

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
2014
Commercial and industrial:
Energy	$	706	$	636	$	—	$	636	$	—	$	571
Other commercial	42,212		29,007		2,853		31,860		1,613		27,154
Commercial real estate:
Buildings, land and other	22,919		17,441		265		17,706		67		20,339
Construction	3,007		2,793		—		2,793		—		739
Consumer real estate	812		596		—		596		—		674
Consumer and other	—		—		—		—		—		159
Total	$	69,656	$	50,473	$	3,118	$	53,591	$	1,680	$	49,636
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 2014, 2013 and 2012 are set forth in the following table.

	2014				2013				2012
	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	5,795		5,391		6,334		4,937		1,602		1,478
Commercial real estate:
Buildings, land and other	3,121		2,948		7,964		5,747		714		710
Consumer real estate	—		—		—		—		—		—
Consumer	—		—		7		—		—		—
	$	8,916	$	8,339	$	14,833	$	11,215	$	2,316	$	2,188

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, 2014			December 31, 2013
	Weighted Average Risk Grade	Loans		Weighted Average Risk Grade	Loans
Commercial and industrial:
Energy
Risk grades 1-8	5.37	$	1,740,455	5.37	$	1,106,348
Risk grade 9	9.00	27,313		9.00	7,726
Risk grade 10	10.00	161		10.00	245
Risk grade 11	11.00	5,380		11.00	500
Risk grade 12	12.00	636		12.00	590
Risk grade 13	13.00	—		13.00	—
Total energy	5.45	$	1,773,945	5.40	$	1,115,409
Other commercial
Risk grades 1-8	5.93	$	3,785,171	5.95	$	3,507,963
Risk grade 9	9.00	65,166		9.00	74,766
Risk grade 10	10.00	54,519		10.00	89,878
Risk grade 11	11.00	55,034		11.00	92,917
Risk grade 12	12.00	31,683		12.00	21,389
Risk grade 13	13.00	2,225		13.00	4,754
Total other commercial	6.16	$	3,993,798	6.27	$	3,791,667
Commercial real estate:
Buildings, land and other
Risk grades 1-8	6.53	$	3,148,339	6.59	$	2,844,665
Risk grade 9	9.00	72,906		9.00	65,770
Risk grade 10	10.00	87,889		10.00	49,881
Risk grade 11	11.00	43,336		11.00	53,208
Risk grade 12	12.00	19,501		12.00	24,387
Risk grade 13	13.00	138		13.00	2,786
Total commercial real estate	6.76	$	3,372,109	6.83	$	3,040,697
Construction
Risk grades 1-8	6.91	$	617,805	7.05	$	418,999
Risk grade 9	9.00	8,003		9.00	1,301
Risk grade 10	10.00	1,323		10.00	5,931
Risk grade 11	11.00	64		11.00	408
Risk grade 12	12.00	2,793		12.00	—
Risk grade 13	13.00	—		13.00	—
Total construction	6.97	$	629,988	7.10	$	426,639

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

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

	2014			2013			2012
Commercial and industrial:
Energy	$	(1,237	)	$	(913	)	$	4
Other commercial	(2,911		)	(28,431		)	(13,627		)
Commercial real estate:
Buildings, land and other	(2,348		)	(381		)	698
Construction	348			256			78
Consumer real estate	(733		)	(719		)	(638		)
Consumer and other	(2,329		)	(2,409		)	(2,289		)
Total	$	(9,210	)	$	(32,597	)	$	(15,774	)

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, 2014
Historical valuation allowances	$	32,421		$	14,684		$	2,017		$	10,482		$	—	$	59,604
Specific valuation allowances	1,613			67			—			—			—		1,680
General valuation allowances:
Environmental risk adjustment	6,773			3,547			474			2,683			—		13,477
Distressed industries	3,090			3			—			—			—		3,093
Excessive industry concentrations	2,114			378			—			—			—		2,492
Large relationship concentrations	2,248			1,559			—			—			—		3,807
Highly-leveraged credit relationships	3,958			1,347			—			—			—		5,305
Policy exceptions	1,907			875			—			—			—		2,782
Credit and collateral exceptions	1,483			681			—			—			—		2,164
Loans not reviewed by concurrence	2,110			2,284			2,336			1,176			—		7,906
Adjustment for recoveries	(6,234		)	(1,800		)	(364		)	(7,439		)	—		(15,837		)
General macroeconomic risk	7,709			3,538			715			1,107			—		13,069
Total	$	59,192		$	27,163		$	5,178		$	8,009		$	—	$	99,542
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

Activity in Allowance for Loan Losses by Portfolio Segment

The following table details activity in the allowance for loan losses by portfolio segment for 2014, 2013 and 2012. 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
2014
Beginning balance	$	52,790		$	22,590		$	5,230		$	5,010		$	6,818		$	92,438
Provision for loan losses	10,550			6,573			681			5,328			(6,818		)	16,314
Charge-offs	(13,820		)	(3,800		)	(1,097		)	(9,768		)	—			(28,485		)
Recoveries	9,672			1,800			364			7,439			—			19,275
Net charge-offs	(4,148		)	(2,000		)	(733		)	(2,329		)	—			(9,210		)
Ending balance	$	59,192		$	27,163		$	5,178		8,009			$	—		$	99,542
Period-end amount allocated to:
Loans individually evaluated for impairment	$	11,836		$	1,164		$	—		$	—		$	—		$	13,000
Loans collectively evaluated for impairment	47,356			25,999			5,178			8,009			—			86,542
Ending balance	$	59,192		$	27,163		$	5,178		$	8,009		$	—		$	99,542
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

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, 2014 and 2013 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
2014
Loans individually evaluated for impairment	$	149,638	$	155,044	$	596	$	—	$	—		$	305,278
Loans collectively evaluated for impairment	5,618,105		3,847,053		848,455		393,601		(24,957		)	10,682,257
Ending balance	$	5,767,743	$	4,002,097	$	849,051	$	393,601	$	(24,957	)	$	10,987,535
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