The carrying value as of the balance sheet date of junior subordinated debentures, at amortized cost.

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The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

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For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses.

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Net carrying amount of loans and leases receivable covered by loss sharing agreements.

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The aggregate carrying amount of loans receivable that will be sold to other entities. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market, or elected fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

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Fair Value Measurement (Schedule Of Fair Value Assets And Liabilities Not Measured At Fair Value By Level) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 223,532	$ 152,265
Securities held to maturity	4,541	4,714
Loans held for sale	320,132	102,098
Non-covered loans and leases, net	6,681,080	5,888,098
Covered loans and leases, net	477,078	622,451
Restricted equity securities	33,443	32,581
FDIC indemnification asset	52,798	91,089	146,413
Deposits	9,379,275	9,236,690	9,433,805
Securities sold under agreements to repurchase	137,075	124,605
Term debt	253,605	255,676
Junior subordinated debentures, at amortized cost	110,985	102,544
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	320,132	102,098
Umpqua Bank [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Junior subordinated debentures, at amortized cost	110,985	102,544
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	543,787
Securities held to maturity	4,732
Non-covered loans and leases, net	6,652,179
Covered loans and leases, net	543,628
Restricted equity securities	33,443
Bank owned life insurance assets	93,831
FDIC indemnification asset	18,714
Visa Class B common stock	28,385
Securities sold under agreements to repurchase	137,075
Term debt	289,404
Junior subordinated debentures, at amortized cost	78,529
Estimated Fair Value [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	543,787
Restricted equity securities	33,443
Bank owned life insurance assets	93,831
Estimated Fair Value [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities sold under agreements to repurchase	137,075
Term debt	289,404
Estimated Fair Value [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	4,732
Non-covered loans and leases, net	6,652,179
Covered loans and leases, net	543,628
FDIC indemnification asset	18,714
Visa Class B common stock	28,385
Junior subordinated debentures, at amortized cost	78,529
Estimated Fair Value [Member] \| Non-Maturity Deposits [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	7,376,288
Estimated Fair Value [Member] \| Non-Maturity Deposits [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	7,376,288
Estimated Fair Value [Member] \| Deposits with Stated Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	2,020,358
Estimated Fair Value [Member] \| Deposits with Stated Maturities [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	$ 2,020,358