|
Securities (Carrying Value of Securities Pledged as Collateral) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Carrying amount of securities pledged as collateral | $ 420,243 | $ 458,532 |
|
To Washington and Oregon State To Secure Public Deposits [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Carrying amount of securities pledged as collateral | 225,345 | 153,328 |
|
To Federal Home Loan Bank To Secure Advances [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Carrying amount of securities pledged as collateral | 91,097 | 110,780 |
|
To Federal Reserve Bank To Secure Borrowings [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Carrying amount of securities pledged as collateral | 56,347 | 149,315 |
|
Other Securities [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Carrying amount of securities pledged as collateral | $ 47,454 | $ 45,109 |