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Regulatory Capital (Tables)
 12 Months Ended
Dec. 31, 2024
Broker-Dealer [Abstract]  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations
The following table shows the Company's consolidated and the Bank's capital adequacy ratios compared to the regulatory minimum capital ratio and the regulatory minimum capital ratio needed to qualify as a "well-capitalized" institution, as calculated under regulatory guidelines of Basel III as of December 31, 2024 and 2023:
ActualFor Capital Adequacy PurposesTo be Well Capitalized
(dollars in thousands)AmountRatioRatioRatio
December 31, 2024    
Total Capital (to Risk Weighted Assets)    
Consolidated$5,082,012 12.75 %8.00 %10.00 %
Umpqua Bank$4,951,381 12.42 %8.00 %10.00 %
Tier 1 Capital (to Risk Weighted Assets)
Consolidated$4,200,595 10.54 %6.00 %8.00 %
Umpqua Bank$4,530,964 11.37 %6.00 %8.00 %
Tier 1 Common (to Risk Weighted Assets)
Consolidated$4,200,595 10.54 %4.50 %6.50 %
Umpqua Bank$4,530,964 11.37 %4.50 %6.50 %
Tier 1 Capital (to Average Assets)
Consolidated$4,200,595 8.31 %4.00 %5.00 %
Umpqua Bank$4,530,964 8.97 %4.00 %5.00 %
December 31, 2023    
Total Capital (to Risk Weighted Assets)    
Consolidated$4,770,335 11.86 %8.00 %10.00 %
Umpqua Bank$4,653,920 11.57 %8.00 %10.00 %
Tier 1 Capital (to Risk Weighted Assets)
Consolidated$3,876,985 9.64 %6.00 %8.00 %
Umpqua Bank$4,231,569 10.52 %6.00 %8.00 %
Tier 1 Common (to Risk Weighted Assets)
Consolidated
$3,876,985 9.64 %4.50 %6.50 %
Umpqua Bank
$4,231,569 10.52 %4.50 %6.50 %
Tier 1 Capital (to Average Assets)
Consolidated$3,876,985 7.60 %4.00 %5.00 %
Umpqua Bank$4,231,569 8.30 %4.00 %5.00 %