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Regulatory Requirements And Capital Ratios (Schedule Of Capital Amounts And Ratios) (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Parent Company |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
CET1 capital | $ 627,579 | $ 598,068
CET1 ratio | 0.157 | 0.162
CET1 capital, minimum capital required basel III fully phased in | $ 279,768 | $ 257,965
CET1 ratio, minimum capital required basel III fully phased in | 7.00% | 7.00%
CET1 capital, required to be well-capitalized | $ 259,875 | $ 239,538
CET1 ratio, required to be well capitalized | 6.50% | 6.50%
Tier I capital | $ 627,579 | $ 598,068
Tier I capital, ratio | 0.157 | 0.162
Tier 1, capital, minimum capital required basel III fully phased in | $ 339,718 | $ 313,243
Tier 1, ratio, minimum capital required basel III fully phased in | 8.50% | 8.50%
Tier 1, capital, required to be well-capitalized | $ 319,735 | $ 294,817
Tier 1, ratio, required to be well-capitalized | 0.080 | 0.080
Total capital | $ 648,646 | $ 612,654
Total capital, ratio | 0.162 | 0.166
Total capital, minimum capital required basel III fully phased in | $ 419,652 | $ 386,947
Total capital, ratio, minimum capital required basel III fully phased in | 10.50% | 10.50%
Total capital, required to be well-capitalized | $ 399,669 | $ 368,521
Total capital, ratio, required to be well-capitalized | 0.100 | 0.100
Tier 1 Leverage Capital, Average Assets | $ 627,579 | $ 598,068
Tier I Leverage Ratio, Average Assets | 0.102 | 0.100
Tier 1 Leverage Capital, minimum capital required basel III fully phased in | $ 245,468 | $ 238,954
Tier 1 Leverage Ratio, minimum capital required basel III fully phased in | 4.00% | 4.00%
Tier 1 Leverage Capital Required to be Well Capitalized | $ 306,835 | $ 298,692
Tier 1 Leverage Capital, Average Assets, Well Capitalized Ratio | 0.050 | 0.050
City National |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
CET1 capital | $ 549,031 | $ 508,586
CET1 ratio | 0.138 | 0.139
CET1 capital, minimum capital required basel III fully phased in | $ 278,692 | $ 256,520
CET1 ratio, minimum capital required basel III fully phased in | 7.00% | 7.00%
CET1 capital, required to be well-capitalized | $ 258,785 | $ 238,197
CET1 ratio, required to be well capitalized | 6.50% | 6.50%
Tier I capital | $ 549,031 | $ 508,586
Tier I capital, ratio | 0.138 | 0.139
Tier 1, capital, minimum capital required basel III fully phased in | $ 338,412 | $ 311,488
Tier 1, ratio, minimum capital required basel III fully phased in | 8.50% | 8.50%
Tier 1, capital, required to be well-capitalized | $ 318,505 | $ 293,166
Tier 1, ratio, required to be well-capitalized | 0.080 | 0.080
Total capital | $ 570,099 | $ 523,172
Total capital, ratio | 0.143 | 0.143
Total capital, minimum capital required basel III fully phased in | $ 418,038 | $ 384,780
Total capital, ratio, minimum capital required basel III fully phased in | 10.50% | 10.50%
Total capital, required to be well-capitalized | $ 398,131 | $ 366,457
Total capital, ratio, required to be well-capitalized | 0.100 | 0.100
Tier 1 Leverage Capital, Average Assets | $ 549,031 | $ 508,586
Tier I Leverage Ratio, Average Assets | 0.089 | 0.086
Tier 1 Leverage Capital, minimum capital required basel III fully phased in | $ 245,587 | $ 237,973
Tier 1 Leverage Ratio, minimum capital required basel III fully phased in | 4.00% | 4.00%
Tier 1 Leverage Capital Required to be Well Capitalized | $ 306,984 | $ 297,466
Tier 1 Leverage Capital, Average Assets, Well Capitalized Ratio | 0.050 | 0.050

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