Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Recorded Investment in Loans Modified in TDRs (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	$ 53,000	$ 57,000	$ 56,000
Partial charge-offs on loans classified as TDRs	110,000	6,000	31,000
Payment deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	52,000	31,000	55,000
Partial forgiveness of principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period		2,000	1,000
Interest rate reductions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	1,000	2,000
Combination Of TDR Modifications
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period		22,000
Investor dependent
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	30,000	12,000	32,000
Investor dependent \| Early stage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	0	12,000	6,000
Investor dependent \| Growth stage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	30,000	0	26,000
Cash flow dependent and innovation C&I \| Cash flow dependent - SLBO
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	0	12,000	22,000
Cash flow dependent and innovation C&I \| Innovation C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	1,000	0	1,000
Private Bank
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	17,000	4,000	0
CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	5,000	29,000	0
Premium wine and other \| Premium wine
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified in TDRs during the period	$ 0	$ 0	$ 1,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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