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Regulatory Capital (Summary of Company's Capital Amounts And Ratios) (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Consolidated |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Capital | $ 4,770,335 | $ 3,651,382
Capital to Risk Weighted Assets | 0.1186 | 0.1371
Capital Required for Capital Adequacy | $ 3,218,301 | $ 2,130,565
Capital Required for Capital Adequacy to Risk Weighted Assets | 0.0800 | 0.0800
Capital Required to be Well Capitalized | $ 4,022,876 | $ 2,663,207
Capital Required to be Well Capitalized to Risk Weighted Assets | 0.1000 | 0.1000
Tier One Risk Based Capital | $ 3,876,985 | $ 2,934,708
Tier One Risk Based Capital to Risk Weighted Assets | 0.0964 | 0.1102
Tier One Risk Based Capital Required for Capital Adequacy | $ 2,413,726 | $ 1,597,924
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 0.0600 | 0.0600
Tier One Risk Based Capital Required to be Well Capitalized | $ 3,218,301 | $ 2,130,565
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 0.0800 | 0.0800
Common Equity Tier One Capital | $ 3,876,985 | $ 2,934,708
Common Equity Tier One Capital Ratio | 0.0964 | 0.1102
Common Equity Tier One Capital Required for Capital Adequacy | $ 1,810,294 | $ 1,198,443
Tier One Common Equity Required for Capital Adequacy to Risk Weighted Assets | 4.50% | 4.50%
Common Equity Tier One Capital Required to be Well-Capitalized | $ 2,614,869 | $ 1,731,084
Tier One Common Equity Required to be Well Capitalized to Risk Weighted Assets | 6.50% | 6.50%
Tier One Leverage Capital | $ 3,876,985 | $ 2,934,708
Tier One Leverage Capital to Average Assets | 0.0760 | 0.0914
Tier One Leverage Capital Required for Capital Adequacy | $ 2,040,344 | $ 1,283,669
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | 0.0400 | 0.0400
Tier One Leverage Capital Required to be Well Capitalized | $ 2,550,431 | $ 1,604,586
Tier One Leverage Capital Required to be Well Capitalized to Average Assets | 0.0500 | 0.0500
Umpqua Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Capital | $ 4,653,920 | $ 3,440,574
Capital to Risk Weighted Assets | 0.1157 | 0.1292
Capital Required for Capital Adequacy | $ 3,217,821 | $ 2,130,240
Capital Required for Capital Adequacy to Risk Weighted Assets | 0.0800 | 0.0800
Capital Required to be Well Capitalized | $ 4,022,276 | $ 2,662,799
Capital Required to be Well Capitalized to Risk Weighted Assets | 0.1000 | 0.1000
Tier One Risk Based Capital | $ 4,231,569 | $ 3,174,899
Tier One Risk Based Capital to Risk Weighted Assets | 0.1052 | 0.1192
Tier One Risk Based Capital Required for Capital Adequacy | $ 2,413,366 | $ 1,597,680
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 0.0600 | 0.0600
Tier One Risk Based Capital Required to be Well Capitalized | $ 3,217,821 | $ 2,130,240
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 0.0800 | 0.0800
Common Equity Tier One Capital | $ 4,231,569 | $ 3,174,899
Common Equity Tier One Capital Ratio | 0.1052 | 0.1192
Common Equity Tier One Capital Required for Capital Adequacy | $ 1,810,024 | $ 1,198,260
Tier One Common Equity Required for Capital Adequacy to Risk Weighted Assets | 4.50% | 4.50%
Common Equity Tier One Capital Required to be Well-Capitalized | $ 2,614,479 | $ 1,730,820
Tier One Common Equity Required to be Well Capitalized to Risk Weighted Assets | 6.50% | 6.50%
Tier One Leverage Capital | $ 4,231,569 | $ 3,174,899
Tier One Leverage Capital to Average Assets | 0.0830 | 0.0989
Tier One Leverage Capital Required for Capital Adequacy | $ 2,040,489 | $ 1,283,610
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | 0.0400 | 0.0400
Tier One Leverage Capital Required to be Well Capitalized | $ 2,550,611 | $ 1,604,513
Tier One Leverage Capital Required to be Well Capitalized to Average Assets | 0.0500 | 0.0500

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