Credit Quality and Allowance for Credit Losses - Summary of Information Pertaining to Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 2,764,538	$ 2,718,185
ACL	33,432	32,916	$ 32,212	$ 31,537
Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,701	4,972
ACL	890	448
One- to four-family first mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	504,145	501,225
ACL	5,257	4,430	3,349	3,255
One- to four-family first mortgage \| Residential properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
ACL	0	0
Home equity loans and lines
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	81,178	79,097
ACL	980	801	705	688
Home equity loans and lines \| Residential properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	817	0
ACL	94	0
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,218,168	1,158,781
ACL	15,205	13,521	15,157	14,805
Commercial real estate \| Commercial properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,260	4,718
ACL	433	200
Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	324,574	352,263
ACL	3,197	5,484	5,304	5,415
Construction and land \| Commercial and residential properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
ACL	0	0
Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	183,809	178,568
ACL	1,055	1,090	582	474
Multi-family residential \| Residential properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
ACL	0	0
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	421,997	418,627
ACL	6,966	6,861	6,378	6,166
Commercial and industrial \| Accounts receivable, Inventory and Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	624	254
ACL	363	248
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	30,667	29,624
ACL	772	729	$ 737	$ 734
Consumer \| Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
ACL	$ 0	$ 0

HOME BANCORP, INC. 10-Q