Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2021

Brokers and Dealers [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 at December 31, 2021 and 2020:

	Actual				For Capital Adequacy Purposes				To be Well Capitalized
(dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2021
Total Capital (to Risk Weighted Assets)
Consolidated	$	3,429,047	14.26	%	$	1,923,934	8.00	%	$	2,404,917	10.00	%
Umpqua Bank	$	3,085,848	12.83	%	$	1,924,015	8.00	%	$	2,405,019	10.00	%
Tier 1 Capital (to Risk Weighted Assets)
Consolidated	$	2,785,794	11.58	%	$	1,442,950	6.00	%	$	1,923,934	8.00	%
Umpqua Bank	$	2,893,593	12.03	%	$	1,443,011	6.00	%	$	1,924,015	8.00	%
Tier 1 Common (to Risk Weighted Assets)
Consolidated	$	2,785,794	11.58	%	$	1,082,213	4.50	%	$	1,563,196	6.50	%
Umpqua Bank	$	2,893,593	12.03	%	$	1,082,258	4.50	%	$	1,563,262	6.50	%
Tier 1 Capital (to Average Assets)
Consolidated	$	2,785,794	9.01	%	$	1,236,265	4.00	%	$	1,545,331	5.00	%
Umpqua Bank	$	2,893,593	9.36	%	$	1,236,518	4.00	%	$	1,545,648	5.00	%
December 31, 2020
Total Capital (to Risk Weighted Assets)
Consolidated	$	3,347,926	15.63	%	$	1,713,891	8.00	%	$	2,142,364	10.00	%
Umpqua Bank	$	3,134,116	14.63	%	$	1,713,809	8.00	%	$	2,142,262	10.00	%
Tier 1 Capital (to Risk Weighted Assets)
Consolidated	$	2,636,194	12.31	%	$	1,285,418	6.00	%	$	1,713,891	8.00	%
Umpqua Bank	$	2,873,383	13.41	%	$	1,285,357	6.00	%	$	1,713,809	8.00	%
Tier 1 Common (to Risk Weighted Assets)
Consolidated	$	2,636,194	12.31	%	$	964,064	4.50	%	$	1,392,536	6.50	%
Umpqua Bank	$	2,873,383	13.41	%	$	964,018	4.50	%	$	1,392,470	6.50	%
Tier 1 Capital (to Average Assets)
Consolidated	$	2,636,194	8.98	%	$	1,174,129	4.00	%	$	1,467,661	5.00	%
Umpqua Bank	$	2,873,383	9.79	%	$	1,174,065	4.00	%	$	1,467,581	5.00	%