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Regulatory Requirements And Capital Ratios (Schedule Of Capital Amounts And Ratios) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Parent Company |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
CET1 capital | $ 430,154 | $ 371,677
CET1 ratio | 15.10% | 13.30%
CET1 capital, minimum capital required basel III phase in schedule | $ 163,441 | $ 142,845
CET1 ratio, minimum capital required basel III phase in schedule | 5.75% | 5.125%
CET1 capital, minimum capital required basel III fully phased in | $ 198,972 | $ 195,105
CET1 ratio, minimum capital required basel III fully phased in | 7.00% | 7.00%
CET1 capital, required to be well-capitalized | $ 184,760 | $ 181,169
CET1 ratio, required to be well capitalized | 6.50% | 6.50%
Tier I capital | $ 446,154 | $ 387,677
Tier I capital, ratio | 15.70% | 13.90%
Tier 1, capital, minimum capital required basel III phase in schedule | $ 206,078 | $ 184,653
Tier 1, ratio, minimum capital required basel III phase in schedule | 7.25% | 6.625%
Tier 1, capital, minimum capital required basel III fully phased in | $ 241,609 | $ 236,913
Tier 1, ratio, minimum capital required basel III fully phased in | 8.50% | 8.50%
Tier 1, capital, required to be well-capitalized | $ 227,397 | $ 222,977
Tier 1, ratio, required to be well-capitalized | 8.00% | 8.00%
Total capital | $ 465,292 | $ 408,406
Total capital, ratio | 16.40% | 14.70%
Total capital, minimum capital required basel III phase in schedule | $ 262,927 | $ 240,397
Total capital, ratio, minimum capital required basel iIII phase in schedule | 9.25% | 8.625%
Total capital, minimum capital required basel III fully phased in | $ 298,458 | $ 292,658
Total capital, ratio, minimum capital required basel III fully phased in | 10.50% | 10.50%
Total capital, required to be well-capitalized | $ 284,246 | $ 278,722
Total capital, ratio, required to be well-capitalized | 10.00% | 10.00%
Tier 1 Leverage Capital, Average Assets | $ 446,154 | $ 387,677
Tier I Leverage Ratio, Average Assets | 11.00% | 10.10%
Tier 1 Leverage Capital, minimum capital required basel III phase in schedule | $ 161,834 | $ 153,864
Tier 1 Leverage Ratio, minimum capital required basel III phase in schedule | 4.00% | 4.00%
Tier 1 Leverage Capital, minimum capital required basel III fully phased in | $ 161,834 | $ 153,864
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 | $ 202,293 | $ 192,330
Tier 1 Leverage Capital, Average Assets, Well Capitalized Ratio | 5.00% | 5.00%
City National |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
CET1 capital | $ 338,105 | $ 310,912
CET1 ratio | 12.00% | 11.20%
CET1 capital, minimum capital required basel III phase in schedule | $ 162,164 | $ 141,860
CET1 ratio, minimum capital required basel III phase in schedule | 5.75% | 5.125%
CET1 capital, minimum capital required basel III fully phased in | $ 197,418 | $ 193,761
CET1 ratio, minimum capital required basel III fully phased in | 7.00% | 7.00%
CET1 capital, required to be well-capitalized | $ 183,316 | $ 179,921
CET1 ratio, required to be well capitalized | 6.50% | 6.50%
Tier I capital | $ 338,105 | $ 318,872
Tier I capital, ratio | 12.00% | 11.50%
Tier 1, capital, minimum capital required basel III phase in schedule | $ 204,468 | $ 183,381
Tier 1, ratio, minimum capital required basel III phase in schedule | 7.25% | 6.625%
Tier 1, capital, minimum capital required basel III fully phased in | $ 239,721 | $ 235,281
Tier 1, ratio, minimum capital required basel III fully phased in | 8.50% | 8.50%
Tier 1, capital, required to be well-capitalized | $ 225,620 | $ 221,441
Tier 1, ratio, required to be well-capitalized | 8.00% | 8.00%
Total capital | $ 357,243 | $ 338,675
Total capital, ratio | 12.70% | 12.20%
Total capital, minimum capital required basel III phase in schedule | $ 260,873 | $ 238,741
Total capital, ratio, minimum capital required basel iIII phase in schedule | 9.25% | 8.625%
Total capital, minimum capital required basel III fully phased in | $ 296,126 | $ 290,641
Total capital, ratio, minimum capital required basel III fully phased in | 10.50% | 10.50%
Total capital, required to be well-capitalized | $ 282,025 | $ 276,801
Total capital, ratio, required to be well-capitalized | 10.00% | 10.00%
Tier 1 Leverage Capital, Average Assets | $ 338,105 | $ 318,872
Tier I Leverage Ratio, Average Assets | 8.50% | 8.30%
Tier 1 Leverage Capital, minimum capital required basel III phase in schedule | $ 159,625 | $ 153,088
Tier 1 Leverage Ratio, minimum capital required basel III phase in schedule | 4.00% | 4.00%
Tier 1 Leverage Capital, minimum capital required basel III fully phased in | $ 159,625 | $ 153,088
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 | $ 199,531 | $ 191,359
Tier 1 Leverage Capital, Average Assets, Well Capitalized Ratio | 5.00% | 5.00%

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