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Operating Segment Information
 9 Months Ended
Sep. 30, 2021
Segment Reporting [Abstract]  
OPERATING SEGMENT INFORMATION OPERATING SEGMENT INFORMATION
We manage our operations and prepare management reports and other information with a primary focus on geographic area. We conduct our operations primarily through seven separately managed affiliate banks, each with its own local branding and management team, including Zions Bank, Amegy Bank, California Bank & Trust, National Bank of Arizona, Nevada State Bank, Vectra Bank Colorado, and The Commerce Bank of Washington. These affiliate banks comprise our primary business segments. Performance assessment and resource allocation are based upon this geographic structure. The operating segment identified as “Other” includes certain non-bank financial service subsidiaries, centralized back-office functions, and eliminations of transactions between segments.
We allocate the cost of centrally provided services to the business segments based upon estimated or actual usage of those services. We also allocate capital based on the risk-weighted assets held at each business segment. We use an internal funds transfer pricing (“FTP”) allocation system and process to report results of operations for business segments, which is continually refined. In the third quarter of 2020, we began allocating the net interest income associated with our Treasury department to the business segments. Historically, this amount was presented in the “Other” segment. Prior period amounts have been revised to reflect the impact of this change had it been instituted in the periods presented. Total average loans and deposits presented for the business segments include insignificant intercompany amounts between business segments and may also include deposits with the “Other” segment.
At September 30, 2021, Zions Bank operated 96 branches in Utah, 25 branches in Idaho, and one branch in Wyoming. Amegy operated 75 branches in Texas. CB&T operated 83 branches in California. NBAZ operated 56 branches in Arizona. NSB operated 45 branches in Nevada. Vectra operated 34 branches in Colorado and one branch in New Mexico. TCBW operated two branches in Washington and one branch in Oregon.
The accounting policies of the individual business segments are the same as those of the Bank. Transactions between business segments are primarily conducted at fair value, resulting in profits that are eliminated for reporting consolidated results of operations.
The following schedules do not present total assets or income tax expense for each operating segment, but instead present average loans, average deposits, and income before income taxes because we use these metrics when evaluating performance and making decisions pertaining to the business segments. The condensed statement of income identifies the components of income and expense which affect the operating amounts presented in the “Other” segment.
The following schedule presents selected operating segment information for the three months ended September 30, 2021 and 2020:
Zions BankAmegyCB&T
(In millions)202120202021202020212020
SELECTED INCOME STATEMENT DATA
Net interest income$161 $162 $117 $121 $135 $129 
Provision for credit losses(10)(10)(10)6 (12)36 
Net interest income after provision for credit losses
171 172 127 115 147 93 
Noninterest income43 40 37 32 25 22 
Noninterest expense115 111 83 82 77 74 
Income (loss) before income taxes
$99 $101 $81 $65 $95 $41 
SELECTED AVERAGE BALANCE SHEET DATA
Total average loans$12,985 $14,237 $11,865 $13,476 $12,672 $12,954 
Total average deposits24,399 19,283 15,925 13,628 15,900 14,462 
NBAZNSBVectra
(In millions)202120202021202020212020
SELECTED INCOME STATEMENT DATA
Net interest income$50 $54 $38 $37 $34 $34 
Provision for credit losses(5)6 (5)(2)(4)18 
Net interest income after provision for credit losses
55 48 43 39 38 16 
Noninterest income13 9 13 10 8 8 
Noninterest expense38 37 34 35 28 27 
Income (loss) before income taxes
$30 $20 $22 $14 $18 $(3)
SELECTED AVERAGE BALANCE SHEET DATA
Total average loans$4,689 $5,305 $2,892 $3,310 $3,339 $3,542 
Total average deposits7,259 5,996 6,870 5,704 4,362 3,838 
TCBWOtherConsolidated Bank
(In millions)202120202021202020212020
SELECTED INCOME STATEMENT DATA
Net interest income$12 $13 $8 $5 $555 $555 
Provision for credit losses1 1 (1)— (46)55 
Net interest income after provision for credit losses
11 12 9 5 601 500 
Noninterest income1 1 (1)35 139 157 
Noninterest expense5 5 49 71 429 442 
Income (loss) before income taxes
$7 $8 $(41)$(31)$311 $215 
SELECTED AVERAGE BALANCE SHEET DATA
Total average loans$1,542 $1,550 $867 $619 $50,851 $54,993 
Total average deposits1,552 1,316 1,144 2,276 77,411 66,503 
The following schedule presents selected operating segment information for the nine months ended September 30, 2021 and 2020:
Zions BankAmegyCB&T
(In millions)202120202021202020212020
SELECTED INCOME STATEMENT DATA
Net interest income$477 $491 $350 $368 $399 $381 
Provision for credit losses(29)84 (108)133 (81)120 
Net interest income after provision for credit losses
506 407 458 235 480 261 
Noninterest income128 116 104 99 74 66 
Noninterest expense346 332 251 243 233 225 
Income (loss) before income taxes
$288 $191 $311 $91 $321 $102 
SELECTED AVERAGE BALANCE SHEET DATA
Total average loans$13,318 $13,821 $12,337 $13,149 $12,924 $12,170 
Total average deposits23,001 17,735 15,179 12,775 15,564 13,375 
NBAZNSBVectra
(In millions)202120202021202020212020
SELECTED INCOME STATEMENT DATA
Net interest income$155 $162 $111 $110 $103 $101 
Provision for credit losses(29)41 (35)49 (15)41 
Net interest income after provision for credit losses
184 121 146 61 118 60 
Noninterest income35 30 38 31 24 24 
Noninterest expense112 109 106 105 85 80 
Income (loss) before income taxes
$107 $42 $78 $(13)$57 $4 
SELECTED AVERAGE BALANCE SHEET DATA
Total average loans$4,914 $5,097 $3,085 $3,066 $3,422 $3,379 
Total average deposits6,949 5,608 6,500 5,313 4,344 3,497 
TCBWOtherConsolidated Bank
(In millions)202120202021202020212020
SELECTED INCOME STATEMENT DATA
Net interest income$40 $39 $20 $13 $1,655 $1,665 
Provision for credit losses(3)10 (1)3 (301)481 
Net interest income after provision for credit losses
43 29 21 10 1,956 1,184 
Noninterest income4 4 106 38 513 408 
Noninterest expense16 16 143 169 1,292 1,279 
Income (loss) before income taxes
$31 $17 $(16)$(121)$1,177 $313 
SELECTED AVERAGE BALANCE SHEET DATA
Total average loans$1,573 $1,431 $845 $581 $52,418 $52,694 
Total average deposits1,484 1,216 1,500 2,634 74,521 62,153