Document And Entity Information	6 Months Ended
	Jun. 30, 2012	Jul. 31, 2012
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	true
Document Period End Date	Jun. 30, 2012
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2012
Entity Registrant Name	UMPQUA HOLDINGS CORP
Entity Central Index Key	0001077771
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		111,891,811
Amendment Description	Umpqua Holdings Corporation (referred to as "we", "our" or "the Company") is filing this Amendment No. 1 (this "Form 10-Q/A") to its Quarterly Report on Form 10-Q for the quarter ended June 30, 2012, filed with the Securities and Exchange Commission on August 1, 2012 (the "Form 10-Q"), for the sole purpose of correcting an error within its Interactive Data File included in the Form 10-Q filing as Exhibit 101. In the previously-furnished Interactive Data File, Note 2 – Investment Securities was not block-text tagged. No other changes have been made to the Form 10-Q. This Form 10-Q/A continues to speak as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date, and does not modify or update any related disclosures made in the Form 10-Q.