Parent Company Financial Statements (Schedule Of Condensed Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Other assets	$ 111,958	$ 138,702
Total assets	11,636,112	11,795,443	11,562,858
Other liabilities	125,477	105,383
Junior subordinated debentures, at fair value	87,274	85,081
Junior subordinated debentures, at amortized cost	101,899	110,985
Total liabilities	9,908,686	10,071,404
Shareholders' equity	1,727,426	1,724,039
Total liabilities and shareholders' equity	11,636,112	11,795,443
Umpqua Bank [Member]
Condensed Financial Statements, Captions [Line Items]
Non-interest bearing deposits with subsidiary banks	72,679	82,383
Investments in Bank subsidiary	1,847,168	1,829,305
Investments In Nonbank subsidiaries	29,193	25,308
Other assets	1,590	1,498
Total assets	1,950,630	1,938,494
Payable to bank subsidiary	93	49
Other liabilities	33,938	18,340
Junior subordinated debentures, at fair value	87,274	85,081
Junior subordinated debentures, at amortized cost	101,899	110,985
Total liabilities	223,204	214,455
Shareholders' equity	1,727,426	1,724,039
Total liabilities and shareholders' equity	$ 1,950,630	$ 1,938,494