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Investment Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investment Holdings [Line Items]
Amortized Cost	$ 305,579	$ 187,947
Fair Value	305,179	194,890
Washington and Oregon state public deposits
Investment Holdings [Line Items]
Amortized Cost	128,216	119,652
Fair Value	130,217	124,228
Federal Reserve Bank credit facility
Investment Holdings [Line Items]
Amortized Cost	61,057	0
Fair Value	59,674	0
Securities sold under agreement to repurchase
Investment Holdings [Line Items]
Amortized Cost	59,887	38,630
Fair Value	59,655	39,945
Other securities pledged
Investment Holdings [Line Items]
Amortized Cost	56,419	29,665
Fair Value	$ 55,633	$ 30,717

X

- Definition

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818

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- Definition

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+ References

No definition available.

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- Definition

The sum of the fair values, as of the date of each statement of financial position presented, of securities that are restricted as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

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