Commitments, Contingencies and Credit Risk - Financial Instruments Whose Contractual Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Total commitments	$ 359,770	$ 411,499
Commitments to Grant Mortgage Loans
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Total commitments	231,946	359,170
Unfunded Commitments Under Lines of Credit
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]
Total commitments	$ 127,824	$ 52,329

Fair value of commitment subject to concentration of credit or market risk or both.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_FairValueConcentrationOfRiskCommitments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant