XML 33 R24.htm IDEA: XBRL DOCUMENT v3.23.1
Loans and Allowances for Credit Losses (Tables)
 3 Months Ended
Mar. 31, 2023
Loans and Leases Receivable, Net Amount [Abstract]  
Schedule of Loans by Portfolio Segment [Table Text Block]
Portfolio segments of the loan portfolio are as follows (in thousands):
 March 31, 2023December 31, 2022
Fixed
Rate		Variable
Rate		Non-accrualTotalFixed
Rate		Variable
Rate		Non-accrualTotal
Commercial$3,427,345 $10,735,572 $54,432 $14,217,349 $3,392,422 $10,759,780 $60,297 $14,212,499 
Commercial real estate
879,806 3,913,842 21,668 4,815,316 874,716 3,715,491 16,570 4,606,777 
Loans to individuals2,125,020 1,548,173 44,195 3,717,388 2,099,165 1,593,779 44,930 3,737,874 
Total$6,432,171 $16,197,587 $120,295 $22,750,053 $6,366,303 $16,069,050 $121,797 $22,557,150 
Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]
The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands):
Three Months Ended
March 31, 2023
 CommercialCommercial Real EstateLoans to IndividualsTotal
Allowance for loan losses:    
Beginning balance$131,586 $57,648 $46,470 $235,704 
Provision for loan losses6,330 10,426 (2,231)14,525 
Loans charged off(12)(2,208)(1,447)(3,667)
Recoveries of loans previously charged off
1,994 137 767 2,898 
Ending balance$139,898 $66,003 $43,559 $249,460 
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance$18,246 $40,490 $2,183 $60,919 
Provision for off-balance sheet credit risk
2,362 (279)(59)2,024 
Ending balance$20,608 $40,211 $2,124 $62,943 
Three Months Ended
March 31, 2022
 CommercialCommercial Real EstateLoans to IndividualsTotal
Allowance for loan losses:    
Beginning balance$162,056 $58,553 $35,812 $256,421 
Provision for loan losses(5,118)468 683 (3,967)
Loans charged off(6,081)(191)(1,533)(7,805)
Recoveries of loans previously charged off
591 144 1,089 1,824 
Ending balance$151,448 $58,974 $36,051 $246,473 
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance$13,812 $17,442 $1,723 $32,977 
Provision for off-balance sheet credit risk
154 3,023 91 3,268 
Ending balance$13,966 $20,465 $1,814 $36,245 
A $16.0 million provision for credit losses was necessary for the first quarter of 2023, as key economic assumptions in the base case, including projected WTI oil prices and commercial real estate vacancy rates, were less favorable to economic growth.

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at March 31, 2023 is as follows (in thousands):
 Collectively Measured
for General Allowances		Individually Measured
for Specific Allowances		Total
 Recorded InvestmentRelated AllowanceRecorded InvestmentRelated AllowanceRecorded InvestmentRelated
Allowance
Commercial$14,162,917 $137,415 $54,432 $2,483 $14,217,349 $139,898 
Commercial real estate4,793,648 64,453 21,668 1,550 4,815,316 66,003 
Loans to individuals3,673,193 43,559 44,195 — 3,717,388 43,559 
Total$22,629,758 $245,427 $120,295 $4,033 $22,750,053 $249,460 
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2022 is as follows (in thousands):

 Collectively Measured
for General Allowances		Individually Measured
for Specific Allowances		Total
 Recorded InvestmentRelated AllowanceRecorded InvestmentRelated AllowanceRecorded InvestmentRelated
Allowance
Commercial$14,152,202 $127,566 $60,297 $4,020 $14,212,499 $131,586 
Commercial real estate4,590,207 56,098 16,570 1,550 4,606,777 57,648 
Loans to individuals3,692,944 46,470 44,930 — 3,737,874 46,470 
Total$22,435,353 $230,134 $121,797 $5,570 $22,557,150 $235,704 
Schedule of Credit Quality Indicators [Table Text Block]
The following table summarizes the Company’s loan portfolio at March 31, 2023 by the risk grade categories and vintage (in thousands): 
Origination Year
20232022202120202019PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial:
Energy
Pass$12,973 $146,448 $66,052 $8,865 $11,301 $11,408 $3,119,103 $— $3,376,150 
Accruing Substandard— — — — 658 1,060 20,062 — 21,780 
Nonaccrual— — — — — 127 — — 127 
Total energy12,973 146,448 66,052 8,865 11,959 12,595 3,139,165 — 3,398,057 
Loans charged-off, year-to-date— — — — — — — — — 
Healthcare
Pass175,703 876,440 615,643 479,575 386,837 1,027,229 220,992 19 3,782,438 
Special Mention— — 204 429 21,767 45,663 60 — 68,123 
Accruing Substandard— — — 2,178 1,456 7,899 — — 11,533 
Nonaccrual— — — — 26,137 11,110 — — 37,247 
Total healthcare175,703 876,440 615,847 482,182 436,197 1,091,901 221,052 19 3,899,341 
Loans charged-off, year-to-date— — — — — — — — — 
Services
Pass216,237 759,320 470,813 275,065 171,904 805,240 799,522 506 3,498,607 
Special Mention— 19,077 1,365 219 672 2,521 6,246 — 30,100 
Accruing Substandard— 397 86 — 2,232 2,599 21,499 84 26,897 
Nonaccrual— — 5,281 376 — — 2,441 — 8,098 
Total services216,237 778,794 477,545 275,660 174,808 810,360 829,708 590 3,563,702 
Loans charged-off, year-to-date— — — — — — 5 — 5 
General business
Pass288,367 607,548 320,451 162,810 147,988 355,227 1,336,404 2,193 3,220,988 
Special Mention— 7,515 8,200 87 70 1,762 31,903 25 49,562 
Accruing Substandard5,516 38,443 6,841 56 4,013 7,940 13,929 — 76,738 
Nonaccrual— — — 1,030 14 68 7,842 7 8,961 
Total general business293,883 653,506 335,492 163,983 152,085 364,997 1,390,078 2,225 3,356,249 
Loans charged-off, year-to-date— — — — — 3 — 4 7 
Total commercial698,796 2,455,188 1,494,936 930,690 775,049 2,279,853 5,580,003 2,834 14,217,349 
Origination Year
20232022202120202019PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial real estate:
Pass46,900 1,383,300 1,187,644 540,129 644,511 832,101 148,063 — 4,782,648 
Special Mention— — — — — 11,000 — — 11,000 
Nonaccrual— — — — 7,459 14,209 — — 21,668 
Total commercial real estate46,900 1,383,300 1,187,644 540,129 651,970 857,310 148,063 — 4,815,316 
Loans charged-off, year-to-date— — — — — 2,208 — — 2,208 
Loans to individuals:
Residential mortgage
Pass71,000 348,697 371,044 380,908 61,409 285,877 351,428 21,242 1,891,605 
Special Mention— 68 — 1,355 — 309 2,843 — 4,575 
Accruing Substandard— — — — — 7 147 — 154 
Nonaccrual— 1,184 1,738 2,851 649 20,547 1,994 730 29,693 
Total residential mortgage71,000 349,949 372,782 385,114 62,058 306,740 356,412 21,972 1,926,027 
Loans charged-off, year-to-date— — — — — 4 — 1 5 
Residential mortgage guaranteed by U.S. government agencies
Pass— 1,021 2,321 7,321 8,963 190,825 — — 210,451 
Nonaccrual— — — 299 1,005 12,998 — — 14,302 
Total residential mortgage guaranteed by U.S. government agencies— 1,021 2,321 7,620 9,968 203,823 — — 224,753 
Personal:
Pass24,231 236,041 190,370 156,515 181,332 220,604 550,478 253 1,559,824 
Special Mention— 115 109 47 2 — 6,055 39 6,367 
Accruing Substandard— 17 40 — 160 — — — 217 
Nonaccrual— 69 5 10 19 19 78 — 200 
Total personal24,231 236,242 190,524 156,572 181,513 220,623 556,611 292 1,566,608 
Loans charged-off, year-to-date— — — — — 1,437 1 4 1,442 
Total loans to individuals95,231 587,212 565,627 549,306 253,539 731,186 913,023 22,264 3,717,388 
Total loans$840,927 $4,425,700 $3,248,207 $2,020,125 $1,680,558 $3,868,349 $6,641,089 $25,098 $22,750,053 
The following table summarizes the Company's loan portfolio at December 31, 2022 by the risk grade categories and vintage (in thousands): 
Origination Year
20222021202020192018PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial:
Energy
Pass$157,745 $76,951 $30,284 $12,783 $5,992 $4,980 $3,104,906 $— $3,393,641 
Special Mention— — — — — — — — — 
Accruing Substandard
— — — 664 385 683 28,018 — 29,750 
Nonaccrual— — — — — 159 1,240 — 1,399 
Total energy157,745 76,951 30,284 13,447 6,377 5,822 3,134,164 — 3,424,790 
Healthcare
Pass932,097 604,886 476,854 404,204 464,989 618,163 245,898 20 3,747,111 
Special Mention— — — 20,071 — 18,859 4 — 38,934 
Accruing Substandard
— — — — — 14,304 3,634 — 17,938 
Nonaccrual— — — 26,480 6,373 8,181 — — 41,034 
Total healthcare932,097 604,886 476,854 450,755 471,362 659,507 249,536 20 3,845,017 
Services
Pass821,785 496,510 286,085 193,481 156,736 696,300 722,371 639 3,373,907 
Special Mention502 5,139 989 771 894 1,345 8,668 — 18,308 
Accruing Substandard
— — — 2,459 43 2,789 17,665 122 23,078 
Nonaccrual— 5,570 449 — — 2,389 7,820 — 16,228 
Total services822,287 507,219 287,523 196,711 157,673 702,823 756,524 761 3,431,521 
General business
Pass725,894 361,839 198,274 172,878 139,140 283,694 1,570,536 2,329 3,454,584 
Special Mention17,759 13,065 208 71 7 2,291 7,094 26 40,521 
Accruing Substandard
— 2,169 66 4,130 4,680 3,287 94 4 14,430 
Nonaccrual— — 1,052 14 72 5 485 8 1,636 
Total general business743,653 377,073 199,600 177,093 143,899 289,277 1,578,209 2,367 3,511,171 
Total commercial2,655,782 1,566,129 994,261 838,006 779,311 1,657,429 5,718,433 3,148 14,212,499 
Commercial real estate:
Pass1,188,483 1,158,002 552,616 641,102 247,625 633,304 161,616 — 4,582,748 
Special Mention— — — — — — — — — 
Accruing Substandard
— — — 7,459 — — — — 7,459 
Nonaccrual— — — — — 16,570 — — 16,570 
Total commercial real estate1,188,483 1,158,002 552,616 648,561 247,625 649,874 161,616 — 4,606,777 
Origination Year
20222021202020192018PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Loans to individuals:
Residential mortgage
Pass354,497 373,190 393,002 63,142 40,525 260,625 352,126 22,176 1,859,283 
Special Mention— 81 42 — 142 388 527 87 1,267 
Accruing Substandard— — 187 — — 138 117 1 443 
Nonaccrual32 1,656 2,717 362 1,904 20,139 2,216 765 29,791 
Total residential mortgage354,529 374,927 395,948 63,504 42,571 281,290 354,986 23,029 1,890,784 
Residential mortgage guaranteed by U.S. government agencies
Pass289 2,254 9,000 10,722 17,244 191,426 — — 230,935 
Nonaccrual— — 299 1,460 2,319 10,927 — — 15,005 
Total residential mortgage guaranteed by U.S. government agencies289 2,254 9,299 12,182 19,563 202,353 — — 245,940 
Personal:
Pass254,497 193,095 154,887 172,114 68,871 201,278 549,187 332 1,594,261 
Special Mention47 28 40 12 17 — 6,003 4 6,151 
Accruing Substandard
— 444 — 160 — — — — 604 
Nonaccrual38 7 12 22 14 18 23 — 134 
Total personal254,582 193,574 154,939 172,308 68,902 201,296 555,213 336 1,601,150 
Total loans to individuals609,400 570,755 560,186 247,994 131,036 684,939 910,199 23,365 3,737,874 
Total loans$4,453,665 $3,294,886 $2,107,063 $1,734,561 $1,157,972 $2,992,242 $6,790,248 $26,513 $22,557,150 
Financing Receivable, Nonaccrual [Table Text Block]
A summary of nonaccruing loans at March 31, 2023 follows (in thousands): 
As of March 31, 2023
 TotalWith No
Allowance		With AllowanceRelated Allowance
Commercial:    
Energy$127 $127 $— $— 
Healthcare37,247 37,247 — — 
Services8,097 387 7,710 2,483 
General business8,961 8,961 — — 
Total commercial54,432 46,722 7,710 2,483 
Commercial real estate21,668 7,628 14,040 1,550 
Loans to individuals:    
Residential mortgage29,693 29,693 — — 
Residential mortgage guaranteed by U.S. government agencies
14,302 14,302 — — 
Personal200 200 — — 
Total loans to individuals44,195 44,195 — — 
Total$120,295 $98,545 $21,750 $4,033 


A summary of nonaccruing loans at December 31, 2022 follows (in thousands): 
As of December 31, 2022
 TotalWith No
Allowance		With AllowanceRelated Allowance
Commercial:    
Energy$1,399 $1,399 $— $— 
Healthcare41,034 34,661 6,373 946 
Services16,228 7,835 8,393 3,074 
General business1,636 1,636 — — 
Total commercial60,297 45,531 14,766 4,020 
Commercial real estate16,570 393 16,177 1,550 
Loans to individuals:    
Residential mortgage29,791 29,791 — — 
Residential mortgage guaranteed by U.S. government agencies
15,005 15,005 — — 
Personal134 134 — — 
Total loans to individuals44,930 44,930 — — 
Total$121,797 $90,854 $30,943 $5,570 
Summary of Loans by Aging Status [Table Text Block]
A summary of loans currently performing and past due as of March 31, 2023 is as follows (in thousands):
  Past Due Past Due 90 Days or More and Accruing
 Current30 to 59
Days		60 to 89 Days90 Days
or More		Total
Commercial:    
Energy$3,398,057 $— $— $— $3,398,057 $— 
Healthcare3,866,921 — — 32,420 3,899,341 45 
Services3,556,753 6,844 45 60 3,563,702 — 
General business3,355,731 492 17 9 3,356,249 9 
Total commercial14,177,462 7,336 62 32,489 14,217,349 54 
Commercial real estate4,806,306 8,965 45 — 4,815,316 — 
Loans to individuals:    
Residential mortgage1,910,799 8,315 363 6,550 1,926,027 22 
Residential mortgage guaranteed by U.S. government agencies
103,992 48,833 — 71,928 224,753 64,980 
Personal1,565,875 567 143 23 1,566,608 — 
Total loans to individuals3,580,666 57,715 506 78,501 3,717,388 65,002 
Total$22,564,434 $74,016 $613 $110,990 $22,750,053 $65,056 
A summary of loans currently performing and past due as of December 31, 2022 is as follows (in thousands):
  Past Due Past Due 90 Days or More and Accruing
 Current30 to 59
Days		60 to 89 Days90 Days
or More		Total
Commercial:    
Energy$3,424,766 $24 $— $— $3,424,790 $— 
Healthcare3,812,164 5,914 26,480 459 3,845,017 — 
Services3,423,042 1,060 2,461 4,958 3,431,521 — 
General business3,509,094 257 1,424 396 3,511,171 396 
Total commercial14,169,066 7,255 30,365 5,813 14,212,499 396 
Commercial real estate4,606,029 531 — 217 4,606,777 — 
Loans to individuals:    
Residential mortgage1,872,155 10,632 1,828 6,169 1,890,784 114 
Residential mortgage guaranteed by U.S. government agencies
108,019 36,119 19,400 82,402 245,940 75,604 
Personal1,600,595 502 21 32 1,601,150 — 
Total loans to individuals3,580,769 47,253 21,249 88,603 3,737,874 75,718 
Total$22,355,864 $55,039 $51,614 $94,633 $22,557,150 $76,114