Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2022	Jan. 31, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-34624
Entity Registrant Name	Umpqua Holdings Corporation
Entity Incorporation, State or Country Code	OR
Entity Tax Identification Number	93-1261319
Entity Address, Address Line One	5885 Meadows Road
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Lake Oswego
Entity Address, State or Province	OR
Entity Address, Postal Zip Code	97035
City Area Code	503
Local Phone Number	727-4100
Title of 12(b) Security	Common Stock
Trading Symbol	UMPQ
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,309,902,752
Entity Common Stock, Shares Outstanding		217,054,807
Entity Central Index Key	0001077771
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false