Loans Receivable and Allowance for Credit Losses - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2024 USD ($) Loan	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) Loan	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of troubled debt restructured loans | Loan		19		19			21
Troubled debt restructured loans		$ 5,400		$ 5,400			$ 5,900
Troubled debt restructured loan, accrual status		4,700		4,700			5,200
Aggregate balance of grain		4,277		4,277
Allowance for credit losses	[1]	(3,623)		(3,623)
Microloans, net of allowance for loan losses		654		654
Microloans originated - put back to Grain		23,986		23,986
Grain Write-Downs		15,341		15,341
Cash Receipts From Grain		6,819		6,819
Grant/reserve (inception-to-June 30, 2024)		(1,826)		(1,826)
Investment in Grain wrote-off				(1,000)
Exposure to Grain	[2]	654		654
Grain write-off and write-down		(65)	$ (346)	(118)	$ (1,260)
Allowance for off-balance sheet credit losses		$ 3,284		$ 3,284		$ 354	3,613
Accounting Standards Update 2022-02
Accounts, Notes, Loans and Financing Receivable [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true		true
Change in accounting principle, accounting standards update, adoption date		Jan. 01, 2023		Jan. 01, 2023
(Benefit) Provision for Contingencies
Accounts, Notes, Loans and Financing Receivable [Line Items]
(Benefit) provision for off-balance-sheet credit losses		$ (500)	$ 500	$ (300)	1,500
Other Liabilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for off-balance sheet credit losses		3,300		3,300			$ 3,600
Grain Technologies LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Micro loan credit limit		1,500		$ 1,500
Number of micro loan outstanding | Loan				10,098
Aggregate balance of grain		4,300		$ 4,300
Allowance for credit losses		3,600		3,600
Microloans, net of allowance for loan losses		700		700
Microloans originated - put back to Grain		24,000		24,000
Grain Write-Downs		(15,300)		(15,300)
Cash Receipts From Grain		6,800		6,800
Grant/reserve (inception-to-June 30, 2024)		1,800		1,800
Security deposits by borrowers		1,600		1,600
Investment in Grain wrote-off						$ 1,000
Exposure to Grain		$ 700		700
Grain recoveries					$ 1,300
Grain write-off and write-down				$ 100
Grain Technologies LLC | Microloans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of micro loan outstanding | Loan				45,322
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Strong Pass Loans to new or existing borrowers collateralized percentage		90.00%		90.00%

[1] Excludes $1.6 million of security deposits by Grain originated borrowers reported in deposits in the accompanying Consolidated Statements of Financial Conditions.

[2] Total remaining exposure to Grain borrowers. These loans are now serviced by the Bank.