v2.4.0.8

Securities (Carrying Value of Securities Pledged as Collateral) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Schedule of Available-for-sale Securities [Line Items] |  |
Carrying amount of securities pledged as collateral | $ 362,787 | $ 374,730
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 | 277,012 | 281,006
To Federal Reserve Bank To Secure Borrowings [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Carrying amount of securities pledged as collateral | 42,694 | 47,634
Other Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Carrying amount of securities pledged as collateral | $ 43,081 | $ 46,090

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- Definition No authoritative reference available. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5086-111524 + Details
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Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration