Loans Receivable and Allowance for Credit Losses - TDR Post-Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 565	$ 28,229	$ 17,871	$ 47,072
Commitment to lend	6,400		6,400		$ 5,000
Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	565	28,229	9,678	29,898
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	17,174
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	8,193	0
Commercial lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	496	28,229	17,802	47,072
Commercial lending | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	496	28,229	9,609	29,898
Commercial lending | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	17,174
Commercial lending | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	8,193	0
Commercial lending | Commercial and industrial (“C&I”)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	496	27,111	17,802	45,954
Commercial lending | Commercial and industrial (“C&I”) | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	496	27,111	9,609	28,780
Commercial lending | Commercial and industrial (“C&I”) | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	17,174
Commercial lending | Commercial and industrial (“C&I”) | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	8,193	0
Commercial lending | Real estate loan | Multifamily residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1,118	0	1,118
Commercial lending | Real estate loan | Principal | Multifamily residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1,118	0	1,118
Commercial lending | Real estate loan | Interest Rate Reduction | Multifamily residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Commercial lending | Real estate loan | Other | Multifamily residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Commercial lending | Total CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1,118	0	1,118
Commercial lending | Total CRE | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1,118	0	1,118
Commercial lending | Total CRE | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment		0	0	0
Commercial lending | Total CRE | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	69	0	69	0
Consumer lending | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	69	0	69	0
Consumer lending | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer lending | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer lending | HELOCs
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	69	0	69	0
Consumer lending | HELOCs | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	69	0	69	0
Consumer lending | HELOCs | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer lending | HELOCs | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer lending | Total residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	69	0	69	0
Consumer lending | Total residential mortgage | Principal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	69	0	69	0
Consumer lending | Total residential mortgage | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer lending | Total residential mortgage | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0