Loans (Tables)

3 Months Ended

Mar. 31, 2015

Loans were as follows:



	March 31, 2015			Percentage of Total		December 31, 2014			Percentage of Total
Commercial and industrial:
Commercial	$	5,582,282		49.8	%	$	5,429,206		49.4	%
Leases	326,253			2.9		338,537			3.1
Total commercial and industrial	5,908,535			52.7		5,767,743			52.5
Commercial real estate:
Commercial mortgages	3,095,830			27.6		3,080,202			28.0
Construction	685,629			6.1		629,988			5.7
Land	292,966			2.6		291,907			2.7
Total commercial real estate	4,074,425			36.3		4,002,097			36.4
Consumer real estate:
Home equity loans	338,732			3.0		342,725			3.1
Home equity lines of credit	222,967			2.0		220,128			2.0
Other	290,704			2.6		286,198			2.6
Total consumer real estate	852,403			7.6		849,051			7.7
Total real estate	4,926,828			43.9		4,851,148			44.1
Consumer and other:
Consumer installment	395,879			3.5		385,479			3.5
Other	7,239			0.1		8,122			0.1
Total consumer and other	403,118			3.6		393,601			3.6
Unearned discounts	(23,668		)	(0.2	)	(24,957		)	(0.2	)
Total loans	$	11,214,813		100.0	%	$	10,987,535		100.0	%

Non-Accrual Loans, Segregated by Class of Loans

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



	March 31, 2015		December 31, 2014
Commercial and industrial:
Energy	$	636	$	636
Other commercial	32,965		34,108
Commercial real estate:
Buildings, land and other	17,145		19,639
Construction	2,740		2,792
Consumer real estate	2,347		2,212
Consumer and other	481		538
Total	$	56,314	$	59,925

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, 2015 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	$	1,000	$	4,538	$	5,538	$	1,813,511		$	1,819,049		$	3,902
Other commercial	23,685		25,431		49,116		4,040,370			4,089,486			6,078
Commercial real estate:
Buildings, land and other	13,405		7,005		20,410		3,368,386			3,388,796			1,278
Construction	1,371		50		1,421		684,208			685,629			50
Consumer real estate	5,670		1,961		7,631		844,772			852,403			1,662
Consumer and other	4,096		721		4,817		398,301			403,118			669
Unearned discounts	—		—		—		(23,668		)	(23,668		)	—
Total	$	49,227	$	39,706	$	88,933	$	11,125,880		$	11,214,813		$	13,639

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 Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance
March 31, 2015
Commercial and industrial:
Energy	$	705	$	636	$	—	$	636	$	—
Other commercial	42,262		28,275		2,720		30,995		1,404
Commercial real estate:
Buildings, land and other	20,257		14,723		197		14,920		71
Construction	3,004		2,740		—		2,740		—
Consumer real estate	789		568		—		568		—
Consumer and other	—		—		—		—		—
Total	$	67,017	$	46,942	$	2,917	$	49,859	$	1,475
December 31, 2014
Commercial and industrial:
Energy	$	706	$	636	$	—	$	636	$	—
Other commercial	42,212		29,007		2,853		31,860		1,613
Commercial real estate:
Buildings, land and other	22,919		17,441		265		17,706		67
Construction	3,007		2,793		—		2,793		—
Consumer real estate	812		596		—		596		—
Consumer and other	—		—		—		—		—
Total	$	69,656	$	50,473	$	3,118	$	53,591	$	1,680

Average Recorded Investment In Impaired Loans

The average recorded investment in impaired loans was as follows:



	Three Months Ended March 31,
	2015		2014
Commercial and industrial:
Energy	$	636	$	529
Other commercial	31,428		20,866
Commercial real estate:
Buildings, land and other	16,313		22,798
Construction	2,767		156
Consumer real estate	582		732
Consumer and other	—		271
Total	$	51,726	$	45,352

Troubled Debt Restructurings

Troubled debt restructurings during the three months ended March 31, 2015 and March 31, 2014 are set forth in the following table.



	Three Months Ended March 31, 2015				Three Months Ended March 31, 2014
	Balance at Restructure		Balance at Period-End		Balance at Restructure		Balance at Period-End
Commercial and industrial:
Energy	$	—	$	—	$	—	$	—
Other commercial	709		613		819		793
	$	709	$	613	$	819	$	793

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, 2015			December 31, 2014
	Weighted Average Risk Grade	Loans		Weighted Average Risk Grade	Loans
Commercial and industrial:
Energy
Risk grades 1-8	5.88	$	1,734,701	5.37	$	1,740,455
Risk grade 9	9.00	24,922		9.00	27,313
Risk grade 10	10.00	36,632		10.00	161
Risk grade 11	11.00	22,158		11.00	5,380
Risk grade 12	12.00	636		12.00	636
Risk grade 13	13.00	—		13.00	—
Total energy	6.07	$	1,819,049	5.45	$	1,773,945
Other commercial
Risk grades 1-8	5.97	$	3,848,801	5.93	$	3,785,171
Risk grade 9	9.00	73,842		9.00	65,166
Risk grade 10	10.00	87,050		10.00	54,519
Risk grade 11	11.00	46,828		11.00	55,034
Risk grade 12	12.00	30,980		12.00	31,683
Risk grade 13	13.00	1,985		13.00	2,225
Total other commercial	6.22	$	4,089,486	6.16	$	3,993,798
Commercial real estate:
Buildings, land and other
Risk grades 1-8	6.57	$	3,135,623	6.53	$	3,148,339
Risk grade 9	9.00	104,344		9.00	72,906
Risk grade 10	10.00	90,872		10.00	87,889
Risk grade 11	11.00	40,812		11.00	43,336
Risk grade 12	12.00	17,074		12.00	19,501
Risk grade 13	13.00	71		13.00	138
Total commercial real estate	6.82	$	3,388,796	6.76	$	3,372,109
Construction
Risk grades 1-8	6.98	$	639,505	6.91	$	617,805
Risk grade 9	9.00	41,422		9.00	8,003
Risk grade 10	10.00	1,900		10.00	1,323
Risk grade 11	11.00	62		11.00	64
Risk grade 12	12.00	2,740		12.00	2,793
Risk grade 13	13.00	—		13.00	—
Total construction	7.13	$	685,629	6.97	$	629,988

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,
	2015			2014
Commercial and industrial:
Energy	$	2		$	(13	)
Other commercial	(852		)	(1,683		)
Commercial real estate:
Buildings, land and other	(307		)	(1,618		)
Construction	1			40
Consumer real estate	(28		)	23
Consumer and other	(812		)	(631		)
Total	$	(1,996	)	$	(3,882	)

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 Industrial			Commercial Real Estate			Consumer Real Estate			Consumer and Other			Unallocated		Total
March 31, 2015
Historical valuation allowances	$	35,339		$	14,620		$	2,046		$	11,900		$	—	$	63,905
Specific valuation allowances	1,404			71			—			—			—		1,475
General valuation allowances:
Environmental risk adjustment	7,263			3,546			478			3,060			—		14,347
Distressed industries	2,762			234			—			—			—		2,996
Excessive industry concentrations	5,903			530			—			—			—		6,433
Large relationship concentrations	2,690			1,855			—			—			—		4,545
Highly-leveraged credit relationships	5,395			1,707			—			—			—		7,102
Policy exceptions	2,116			886			—			—			—		3,002
Credit and collateral exceptions	2,168			908			—			—			—		3,076
Loans not reviewed by concurrence	2,043			2,261			2,364			1,178			—		7,846
Adjustment for recoveries	(5,199		)	(698		)	(211		)	(7,576		)	—		(13,684		)
General macroeconomic risk	2,829			1,185			230			421			—		4,665
Total	$	64,713		$	27,105		$	4,907		$	8,983		$	—	$	105,708
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

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 three months ended March 31, 2015 and 2014. 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
Three months ended:
March 31, 2015
Beginning balance	$	59,192		$	27,163		$	5,178		$	8,009		$	—	$	99,542
Provision for loan losses	6,371			248			(243		)	1,786			—		8,162
Charge-offs	(2,132		)	(478		)	(80		)	(2,805		)	—		(5,495		)
Recoveries	1,282			172			52			1,993			—		3,499
Net charge-offs	(850		)	(306		)	(28		)	(812		)	—		(1,996		)
Ending balance	$	64,713		$	27,105		$	4,907		$	8,983		$	—	$	105,708

March 31, 2014
Beginning balance	$	52,790		$	22,590		$	5,230		$	5,010		$	6,818	$	92,438
Provision for loan losses	5,960			8			(720		)	1,312			40		6,600
Charge-offs	(2,367		)	(1,791		)	(21		)	(2,487		)	—		(6,666		)
Recoveries	671			213			44			1,856			—		2,784
Net charge-offs	(1,696		)	(1,578		)	23			(631		)	—		(3,882		)
Ending balance	$	57,054		$	21,020		$	4,533		$	5,691		$	6,858	$	95,156

Allowance for Loan Losses Disaggregated on the Basis of Impairment Methodology

The following table details the amount of the allowance for loan losses allocated to each portfolio segment as of March 31, 2015, December 31, 2014 and March 31, 2014, detailed on the basis of the impairment methodology we used:



	Commercial and Industrial		Commercial Real Estate		Consumer Real Estate		Consumer and Other		Unallocated		Total
March 31, 2015
Loans individually evaluated for impairment	$	1,404	$	71	$	—	$	—	$	—	$	1,475
Loans collectively evaluated for impairment	63,309		27,034		4,907		8,983		—		104,233
Balance at March 31, 2015	$	64,713	$	27,105	$	4,907	$	8,983	$	—	$	105,708
December 31, 2014
Loans individually evaluated for impairment	$	1,613	$	67	$	—	$	—	$	—	$	1,680
Loans collectively evaluated for impairment	57,579		27,096		5,178		8,009		—		97,862
Balance at December 31, 2014	$	59,192	$	27,163	$	5,178	$	8,009	$	—	$	99,542
March 31, 2014
Loans individually evaluated for impairment	$	2,731	$	776	$	—	$	—	$	—	$	3,507
Loans collectively evaluated for impairment	54,323		20,244		4,533		5,691		6,858		91,649
Balance at March 31, 2014	$	57,054	$	21,020	$	4,533	$	5,691	$	6,858	$	95,156

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

recorded investment in loans as of March 31, 2015, December 31, 2014 and March 31, 2014 related to each balance in the allowance for loan losses by portfolio segment and detailed on the basis of the impairment methodology we used was as follows:



	Commercial and Industrial		Commercial Real Estate		Consumer Real Estate		Consumer and Other		Unearned Discounts			Total
March 31, 2015
Loans individually evaluated for impairment	$	31,631	$	17,660	$	568	$	—	$	—		$	49,859
Loans collectively evaluated for impairment	5,876,904		4,056,765		851,835		403,118		(23,668		)	11,164,954
Ending balance	$	5,908,535	$	4,074,425	$	852,403	$	403,118	$	(23,668	)	$	11,214,813
December 31, 2014
Loans individually evaluated for impairment	$	32,496	$	20,499	$	596	$	—	$	—		$	53,591
Loans collectively evaluated for impairment	5,735,247		3,981,598		848,455		393,601		(24,957		)	10,933,944
Ending balance	$	5,767,743	$	4,002,097	$	849,051	$	393,601	$	(24,957	)	$	10,987,535
March 31, 2014
Loans individually evaluated for impairment	$	19,917	$	21,340	$	718	$	264	$	—		$	42,239
Loans collectively evaluated for impairment	5,086,809		3,474,799		818,279		352,056		(23,537		)	9,708,406
Ending balance	$	5,106,726	$	3,496,139	$	818,997	$	352,320	$	(23,537	)	$	9,750,645