Borrowings and Subordinated Debt - FHLB Secured Advances (Details) - USD ($) $ in Thousands		Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.33%	4.47%
Federal Home Loan Bank of San Francisco | Secured Debt
Debt Instrument [Line Items]
Line of credit, current		$ 2,000,000	$ 1,710,185
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.91%	3.90%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than One Day but Less Than Three Months (3)
Debt Instrument [Line Items]
Line of credit, current		$ 100,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.95%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance No. 1
Debt Instrument [Line Items]
Line of credit, current	[1]	$ 150,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.59%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance No. 2
Debt Instrument [Line Items]
Line of credit, current		$ 100,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.79%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance No. 3
Debt Instrument [Line Items]
Line of credit, current		$ 100,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.79%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance No. 4
Debt Instrument [Line Items]
Line of credit, current		$ 100,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.78%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance due 05/26/2026
Debt Instrument [Line Items]
Line of credit, current		$ 150,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.95%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance due 07/27/2026
Debt Instrument [Line Items]
Line of credit, current		$ 100,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.94%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24) | Advance due 07/30/2026
Debt Instrument [Line Items]
Line of credit, current		$ 150,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.95%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36) | Advance No. 5
Debt Instrument [Line Items]
Line of credit, current	[1]	$ 150,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.63%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36) | Advance No. 6
Debt Instrument [Line Items]
Line of credit, current	[1]	$ 150,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.63%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36) | Advance No. 7
Debt Instrument [Line Items]
Line of credit, current	[1]	$ 150,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.39%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36) | Advance No. 8
Debt Instrument [Line Items]
Line of credit, current		$ 100,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.88%
Federal Home Loan Bank of San Francisco | Secured Debt | More Than Nine Years but Less Than Ten Years
Debt Instrument [Line Items]
Line of credit, current	[1]	$ 500,000
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.18%

[1] Represents FHLB term advances that include a put feature, which allows the FHLB to terminate the advance before its scheduled maturity date.