Loans (Tables)

9 Months Ended

Sep. 30, 2021

Loans were as follows:


	September 30, 2021		Percentage of Total		December 31, 2020		Percentage of Total
Commercial and industrial	$	4,929,656	31.1	%	$	4,955,341	28.4	%
Energy:
Production	774,753		4.9		976,473		5.6
Service	107,585		0.7		116,825		0.7
Other	95,873		0.6		141,900		0.8
Total energy	978,211		6.2		1,235,198		7.1
Paycheck Protection Program	827,820		5.2		2,433,849		13.9
Commercial real estate:
Commercial mortgages	5,648,541		35.7		5,478,806		31.3
Construction	1,266,633		8.0		1,223,814		7.0
Land	335,849		2.1		317,847		1.8
Total commercial real estate	7,251,023		45.8		7,020,467		40.1
Consumer real estate:
Home equity loans	320,597		2.0		329,390		1.9
Home equity lines of credit	478,978		3.0		452,854		2.6
Other	563,464		3.6		548,530		3.1
Total consumer real estate	1,363,039		8.6		1,330,774		7.6
Total real estate	8,614,062		54.4		8,351,241		47.7
Consumer and other	482,921		3.1		505,680		2.9
Total loans	$	15,832,670	100.0	%	$	17,481,309	100.0	%

Non-Accrual Loans, Segregated by Class of Loans

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


	September 30, 2021				December 31, 2020
	Total Non-Accrual		Non-Accrual with No Credit Loss Allowance		Total Non-Accrual		Non-Accrual with No Credit Loss Allowance
Commercial and industrial	$	19,349	$	11,611	$	19,849	$	4,479
Energy	23,347		7,224		23,168		639
Paycheck Protection Program	—		—		—		—
Commercial real estate:
Buildings, land and other	12,247		8,770		15,737		14,116
Construction	1,632		664		1,684		1,684
Consumer real estate	480		178		993		993
Consumer and other	—		—		18		—
Total	$	57,055	$	28,447	$	61,449	$	21,911

Financing Receivable, Non-Accrual Loans, Segregated by Class of Loan and Year of Origination

The following table presents non-accrual loans as of September 30, 2021 by class and year of origination.


	2021		2020		2019		2018		2017		Prior		Revolving Loans		Revolving Loans Converted to Term		Total
Commercial and industrial	$	315	$	7,922	$	4,211	$	676	$	882	$	370	$	2,067	$	2,906	$	19,349
Energy	—		477		6,467		1,513		—		323		12,170		2,397		23,347
Paycheck Protection Program	—		—		—		—		—		—		—		—		—
Commercial real estate:
Buildings, land and other	2,096		1,723		2,811		824		2,051		2,742		—		—		12,247
Construction	—		1,632		—		—		—		—		—		—		1,632
Consumer real estate	—		—		—		—		—		443		—		37		480
Consumer and other	—		—		—		—		—		—		—		—		—
Total	$	2,411	$	11,754	$	13,489	$	3,013	$	2,933	$	3,878	$	14,237	$	5,340	$	57,055

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 September 30, 2021 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	$	42,705	$	8,634	$	51,339	$	4,878,317	$	4,929,656	$	7,522
Energy	1,237		13,233		14,470		963,741		978,211		965
Paycheck Protection Program	—		—		—		827,820		827,820		—
Commercial real estate:
Buildings, land and other	20,910		19,190		40,100		5,944,290		5,984,390		12,224
Construction	—		—		—		1,266,633		1,266,633		—
Consumer real estate	4,148		2,101		6,249		1,356,790		1,363,039		1,985
Consumer and other	3,678		1,029		4,707		478,214		482,921		1,029
Total	$	72,678	$	44,187	$	116,865	$	15,715,805	$	15,832,670	$	23,725

Troubled Debt Restructurings

Troubled debt restructurings during the nine months ended September 30, 2021 and 2020 are set forth in the following table.


	Nine Months Ended September 30, 2021				Nine Months Ended September 30, 2020
	Balance at Restructure		Balance at Period-End		Balance at Restructure		Balance at Period-End
Commercial and industrial	$	1,312	$	1,237	$	3,660	$	1,415
Energy	3,817		3,566		—		—
Commercial real estate:
Buildings, land and other	1,888		1,875		6,606		6,585
Construction	—		—		1,192		1,181

Consumer and other	—		—		1,104		104
	$	7,017	$	6,678	$	12,562	$	9,285

Restructured Loans Past Due in Excess of 90 Days on Financing Receivables

Additional information related to restructured loans as of or for the nine months ended September 30, 2021 and 2020 is set forth in the following table.


	September 30, 2021		September 30, 2020
Restructured loans past due in excess of 90 days at period-end:
Number of loans	1		2
Dollar amount of loans	$	306	$	3,682
Restructured loans on non-accrual status at period end	5,072		5,353
Charge-offs of restructured loans:
Recognized in connection with restructuring	—		—
Recognized on previously restructured loans	1,433		2,188

Weighted Average Risk Grades for All Commercial Loans by Class and Year of Origination

The following tables present weighted-average risk grades for all commercial loans, by class and year of origination/renewal as of September 30, 2021. Paycheck Protection Program (“PPP”) loans are excluded as such loans are fully guaranteed by the Small Business Administration (“SBA”).


	2021		2020		2019		2018		2017		Prior		Revolving Loans		Revolving Loans Converted to Term		Total		W/A Risk Grade
Commercial and industrial
Risk grades 1-8	$	1,009,752	$	730,976	$	405,216	$	201,578	$	160,431	$	149,611	$	1,875,496	$	65,603	$	4,598,663	6.04
Risk grade 9	9,569		35,274		30,953		26,216		12,258		18,329		70,412		5,272		208,283		9.00
Risk grade 10	28,117		6,546		1,871		4,653		1,358		112		12,954		1,652		57,263		10.00
Risk grade 11	1,326		8,603		9,644		4,160		3,098		279		7,189		11,799		46,098		11.00
Risk grade 12	135		7,922		3,263		676		411		370		962		1,974		15,713		12.00
Risk grade 13	180		—		948		—		471		—		1,105		932		3,636		13.00
	$	1,049,079	$	789,321	$	451,895	$	237,283	$	178,027	$	168,701	$	1,968,118	$	87,232	$	4,929,656	6.29
W/A risk grade	5.97		6.35		6.91		7.04		6.20		5.94		6.17		7.60		6.29
Energy
Risk grades 1-8	$	350,757	$	10,562	$	10,339	$	7,060	$	3,958	$	4,518	$	392,527	$	68,437	$	848,158	5.94
Risk grade 9	32,434		712		1,831		270		—		737		10,136		2,574		48,694		9.00
Risk grade 10	—		115		703		668		—		—		860		478		2,824		10.00
Risk grade 11	11,517		1,168		17,711		1,607		—		573		19,133		3,479		55,188		11.00
Risk grade 12	—		34		4,777		90		—		323		4,641		99		9,964		12.00
Risk grade 13	—		443		1,690		1,423		—		—		7,529		2,298		13,383		13.00
	$	394,708	$	13,034	$	37,051	$	11,118	$	3,958	$	6,151	$	434,826	$	77,365	$	978,211	6.55
W/A risk grade	6.37		8.13		9.98		8.77		7.19		7.84		6.26		6.76		6.55
Commercial real estate:
Buildings, land, other
Risk grades 1-8	$	1,153,181	$	1,146,764	$	862,629	$	578,768	$	517,822	$	842,409	$	44,525	$	75,360	$	5,221,458	6.90
Risk grade 9	13,873		143,504		70,218		48,372		29,691		34,746		4,669		6,858		351,931		9.00
Risk grade 10	14,376		16,956		69,882		51,903		65,363		55,732		—		—		274,212		10.00
Risk grade 11	3,995		19,766		11,351		7,615		32,698		40,245		3,000		5,872		124,542		11.00
Risk grade 12	1,896		1,723		2,511		824		2,051		2,492		—		—		11,497		12.00
Risk grade 13	200		—		300		—		—		250		—		—		750		13.00
	$	1,187,521	$	1,328,713	$	1,016,891	$	687,482	$	647,625	$	975,874	$	52,194	$	88,090	$	5,984,390	7.27
W/A risk grade	7.21		7.27		7.40		7.37		7.38		7.04		7.30		7.15		7.27
Construction
Risk grades 1-8	$	429,990	$	284,149	$	299,927	$	20,457	$	—	$	2,593	$	144,950	$	—	$	1,182,066	7.03
Risk grade 9	37,113		32,002		—		—		513		—		13,307		—		82,935		9.00
Risk grade 10	—		—		—		—		—		—		—		—		—		10.00
Risk grade 11	—		—		—		—		—		—		—		—		—		11.00
Risk grade 12	—		1,432		—		—		—		—		—		—		1,432		12.00
Risk grade 13	—		200		—		—		—		—		—		—		200		13.00
	$	467,103	$	317,783	$	299,927	$	20,457	$	513	$	2,593	$	158,257	$	—	$	1,266,633	7.16
W/A risk grade	7.13		6.87		7.46		7.45		9.00		6.79		7.24		—		7.16
Total commercial real estate	$	1,654,624	$	1,646,496	$	1,316,818	$	707,939	$	648,138	$	978,467	$	210,451	$	88,090	$	7,251,023	7.25
W/A risk grade	7.19		7.19		7.41		7.38		7.38		7.04		7.26		7.15		7.25

Weighted Average Risk Grades for All Commercial Loans by Class

The following tables present weighted average risk grades for all commercial loans by class as of December 31, 2020. Refer to our 2020 Form 10-K for details of these loans by year of origination/renewal.


	Commercial and Industrial			Energy			Commercial Real Estate - Buildings, Land and Other			Commercial Real Estate - Construction			Total Commercial Real Estate
	W/A Risk Grade	Loans		W/A Risk Grade	Loans		W/A Risk Grade	Loans		W/A Risk Grade	Loans		W/A Risk Grade	Loans
Risk grades 1-8	6.13	$	4,506,121	5.99	$	968,144	6.97	$	5,047,873	6.99	$	1,110,025	6.98	$	6,157,898
Risk grade 9	9.00	256,198		9.00	133,547		9.00	325,227		9.00	72,287		9.00	397,514
Risk grade 10	10.00	125,977		10.00	46,427		10.00	258,454		10.00	38,962		10.00	297,416
Risk grade 11	11.00	47,196		11.00	63,912		11.00	149,362		11.00	856		11.00	150,218
Risk grade 12	12.00	14,528		12.00	13,741		12.00	15,224		12.00	1,684		12.00	16,908
Risk grade 13	13.00	5,321		13.00	9,427		13.00	513		13.00	—		13.00	513
Total	6.45	$	4,955,341	6.85	$	1,235,198	7.34	$	5,796,653	7.22	$	1,223,814	7.32	$	7,020,467

Age analysis of Past Due Consumer Loans by Class and Year of Origination

Information about the payment status of consumer loans, segregated by portfolio segment and year of origination, as of September 30, 2021 was as follows:


	2021		2020		2019		2018		2017		Prior		Revolving Loans		Revolving Loans Converted to Term		Total
Consumer real estate:
Past due 30-89 days	$	396	$	34	$	277	$	370	$	326	$	1,187	$	174	$	1,384	$	4,148
Past due 90 or more days	—		—		110		11		226		645		967		142		2,101
Total past due	396		34		387		381		552		1,832		1,141		1,526		6,249
Current loans	235,725		283,853		111,449		62,416		54,827		132,108		464,440		11,972		1,356,790
Total	$	236,121	$	283,887	$	111,836	$	62,797	$	55,379	$	133,940	$	465,581	$	13,498	$	1,363,039
Consumer and other:
Past due 30-89 days	$	1,527	$	283	$	182	$	89	$	63	$	18	$	481	$	1,035	$	3,678
Past due 90 or more days	576		10		—		90		—		—		—		353		1,029
Total past due	2,103		293		182		179		63		18		481		1,388		4,707
Current loans	39,156		20,924		10,442		3,268		1,844		1,391		374,993		26,196		478,214
Total	$	41,259	$	21,217	$	10,624	$	3,447	$	1,907	$	1,409	$	375,474	$	27,584	$	482,921

Revolving Loans Converted to Term [Table Text Block]

Revolving loans that converted to term during the three and nine months ended September 30, 2021 and 2020 were as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Commercial and industrial	$	12,009	$	10,224	$	39,551	$	25,340
Energy	52,055		7,144		57,871		38,642
Commercial real estate:
Buildings, land and other	6,012		637		37,093		8,094
Construction	—		—		—		—
Consumer real estate	330		421		1,172		2,132
Consumer and other	1,523		5,494		7,017		15,338
Total	$	71,929	$	23,920	$	142,704	$	89,546

Financing Receivable, Allowance for Credit Loss By Loan Class Calculated in Accordance With CECL Methodology

The following table presents details of the allowance for credit losses on loans segregated by loan portfolio segment as of September 30, 2021 and December 31, 2020. No allowance for credit losses has been recognized for PPP loans as such loans are fully guaranteed by the SBA.


September 30, 2021	Commercial and Industrial		Energy		Commercial Real Estate		Consumer Real Estate		Consumer and Other		Total
Modeled expected credit losses	$	45,395	$	6,962	$	17,033	$	5,934	$	6,412	$	81,736
Q-Factor and other qualitative adjustments	14,081		104		134,071		59		1,440		149,755
Specific allocations	4,290		13,383		950		36		—		18,659
Total	$	63,766	$	20,449	$	152,054	$	6,029	$	7,852	$	250,150
December 31, 2020
Modeled expected credit losses	$	65,645	$	8,910	$	125,126	$	7,926	$	6,945	$	214,552
Q-Factor and other qualitative adjustments	2,877		21,216		9,253		—		—		33,346
Specific allocations	5,321		9,427		513		—		18		15,279
Total	$	73,843	$	39,553	$	134,892	$	7,926	$	6,963	$	263,177

Activity in Allowance for Loan Losses by Portfolio Segment

The following table details activity in the allowance for credit losses on loans by portfolio segment for the three and nine months ended September 30, 2021 and 2020. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. No allowance for credit losses has been recognized for PPP loans as such loans are fully guaranteed by the SBA.


	Commercial and Industrial		Energy		Commercial Real Estate		Consumer Real Estate		Consumer and Other		Total
Three months ended:
September 30, 2021
Beginning balance	$	65,271	$	28,010	$	147,993	$	6,154	$	7,860	$	255,288
Credit loss expense (benefit)	(1,020)		(7,720)		4,007		(982)		2,692		(3,023)
Charge-offs	(1,611)		—		—		—		(5,073)		(6,684)
Recoveries	1,126		159		54		857		2,373		4,569
Net charge-offs	(485)		159		54		857		(2,700)		(2,115)
Ending balance	$	63,766	$	20,449	$	152,054	$	6,029	$	7,852	$	250,150
September 30, 2020
Beginning balance	$	98,536	$	40,817	$	93,425	$	8,998	$	8,285	$	250,061

Credit loss expense (benefit)	(18,547)		13,814		25,368		1,794		1,161		23,590
Charge-offs	(8,605)		—		(242)		(1,088)		(4,219)		(14,154)
Recoveries	1,121		—		42		573		2,242		3,978
Net charge-offs	(7,484)		—		(200)		(515)		(1,977)		(10,176)
Ending balance	$	72,505	$	54,631	$	118,593	$	10,277	$	7,469	$	263,475


	Commercial and Industrial		Energy		Commercial Real Estate		Consumer Real Estate		Consumer and Other		Total
Nine months ended:
September 30, 2021
Beginning balance	$	73,843	$	39,553	$	134,892	$	7,926	$	6,963	$	263,177
Credit loss expense (benefit)	(8,886)		(19,048)		16,583		(3,093)		7,042		(7,402)
Charge-offs	(4,485)		(1,433)		(137)		(672)		(13,015)		(19,742)
Recoveries	3,294		1,377		716		1,868		6,862		14,117
Net (charge-offs) recoveries	(1,191)		(56)		579		1,196		(6,153)		(5,625)
Ending balance	$	63,766	$	20,449	$	152,054	$	6,029	$	7,852	$	250,150
September 30, 2020
Beginning balance	$	51,593	$	37,382	$	31,037	$	4,113	$	8,042	$	132,167
Impact of adopting ASC 326	21,263		(10,453)		(13,519)		2,392		(2,248)		(2,565)
Credit loss expense (benefit)	10,737		96,478		104,716		3,716		8,096		223,743
Charge-offs	(14,815)		(68,842)		(3,826)		(1,508)		(13,402)		(102,393)
Recoveries	3,727		66		185		1,564		6,981		12,523
Net (charge-offs) recoveries	(11,088)		(68,776)		(3,641)		56		(6,421)		(89,870)
Ending balance	$	72,505	$	54,631	$	118,593	$	10,277	$	7,469	$	263,475

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

The following table presents loans that were evaluated for expected credit losses on an individual basis and the related specific allocations, by loan portfolio segment as of September 30, 2021 and December 31, 2020.


	September 30, 2021				December 31, 2020
	Loan Balance		Specific Allocations		Loan Balance		Specific Allocations
Commercial and industrial	$	22,717	$	4,290	$	21,287	$	5,321
Energy	25,671		13,383		22,888		9,427
Paycheck Protection Program	—		—		—		—
Commercial real estate:
Buildings, land and other	28,619		750		34,057		513
Construction	1,632		200		1,684		—
Consumer real estate	302		36		561		—
Consumer and other	—		—		18		18
Total	$	78,941	$	18,659	$	80,495	$	15,279