Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Activity Relating to our Allowance for Credit Losses for Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Increase (decrease) in allowance for credit loss	$ 214,000
Interest receivable	402,000	$ 171,000
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	422,000	448,000	$ 305,000
Charge-offs	(103,000)	(138,000)	(103,000)
Recoveries	32,000	24,000	29,000
Provision (Reduction) for Loans	288,000	66,000	189,000
Foreign Currency Translation Adjustments	(3,000)		3,000
Allowance for credit loss, ending balance	636,000	422,000	448,000
Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			25,000
Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		22,000
Allowance for credit loss, ending balance			22,000
Global fund banking
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	67,000	46,000	107,000
Charge-offs	0	(80,000)	0
Recoveries	7,000	0	0
Provision (Reduction) for Loans	36,000	101,000	9,000
Foreign Currency Translation Adjustments	0		0
Allowance for credit loss, ending balance	110,000	67,000	46,000
Global fund banking | Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			(70,000)
Global fund banking | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		0
Allowance for credit loss, ending balance			0
Investor dependent
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	146,000	213,000	82,000
Charge-offs	(79,000)	(46,000)	(89,000)
Recoveries	20,000	18,000	25,000
Provision (Reduction) for Loans	184,000	(39,000)	125,000
Foreign Currency Translation Adjustments	2,000		(2,000)
Allowance for credit loss, ending balance	273,000	146,000	213,000
Investor dependent | Non-PCD loan
Financing Receivable, Impaired [Line Items]
Provision (Reduction) for Loans		44,000
Investor dependent | Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			72,000
Investor dependent | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		0
Allowance for credit loss, ending balance			0
Cash flow dependent and innovation C&I
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	118,000	125,000	81,000
Charge-offs	(19,000)	(8,000)	(11,000)
Recoveries	1,000	6,000	3,000
Provision (Reduction) for Loans	55,000	(5,000)	53,000
Foreign Currency Translation Adjustments	0		0
Allowance for credit loss, ending balance	155,000	118,000	125,000
Cash flow dependent and innovation C&I | Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			(1,000)
Cash flow dependent and innovation C&I | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		0
Allowance for credit loss, ending balance			0
Private Bank
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	33,000	53,000	22,000
Charge-offs	0	(3,000)	(2,000)
Recoveries	2,000	0	0
Provision (Reduction) for Loans	15,000	(18,000)	21,000
Foreign Currency Translation Adjustments	0		0
Allowance for credit loss, ending balance	50,000	33,000	53,000
Private Bank | Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			12,000
Private Bank | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		1,000
Allowance for credit loss, ending balance			1,000
CRE
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	36,000	0
Charge-offs	0	0
Recoveries	0	0
Provision (Reduction) for Loans	(11,000)	19,000
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	25,000	36,000	0
CRE | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		17,000
Allowance for credit loss, ending balance			17,000
Other C&I
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	14,000	0
Charge-offs	(4,000)	0
Recoveries	1,000	0
Provision (Reduction) for Loans	2,000	10,000
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	13,000	14,000	0
Other C&I | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		4,000
Allowance for credit loss, ending balance			4,000
Premium wine and other
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	8,000	9,000	13,000
Charge-offs	(1,000)	(1,000)	(1,000)
Recoveries	1,000	0	1,000
Provision (Reduction) for Loans	7,000	0	(21,000)
Foreign Currency Translation Adjustments	(5,000)		5,000
Allowance for credit loss, ending balance	10,000	8,000	9,000
Premium wine and other | Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			12,000
Premium wine and other | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		0
Allowance for credit loss, ending balance			0
PPP
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	$ 0	2,000	0
Charge-offs		0	0
Recoveries		0	0
Provision (Reduction) for Loans		(2,000)	2,000
Foreign Currency Translation Adjustments			0
Allowance for credit loss, ending balance		0	2,000
PPP | Impact of Adopting ASC 326
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance			0
PPP | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance		$ 0
Allowance for credit loss, ending balance			$ 0