Loans and Allowance for Credit Losses - Changes in the Allowance (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 1,168,398	$ 1,113,963	$ 1,056,796	$ 909,357	$ 909,357
Provision for Credit Loss	(55,144)	36,322	65,346	262,761
Charge-offs	0	0	(9,889)	(23,407)
Recoveries	199	600	1,200	2,174
Ending Balance	1,113,453	1,150,885	1,113,453	1,150,885	1,056,796
Real estate \| One to four family residential
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	654,119	692,206	654,754	571,728	571,728
Provision for Credit Loss	(45,311)	25,851	(45,946)	146,329
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	608,808	718,057	608,808	718,057	654,754
Real estate \| Home equity
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	11,691	11,611	11,045	5,884	5,884
Provision for Credit Loss	(146)	405	500	6,132
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	11,545	12,016	11,545	12,016	11,045
Real estate \| Equity line of credit
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	24,073	23,475	22,193	19,696	19,696
Provision for Credit Loss	(40)	921	1,840	4,700
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	24,033	24,396	24,033	24,396	22,193
Real estate \| Construction
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	86,964	52,154	21,293	6,170	6,170
Provision for Credit Loss	(3,734)	668	61,937	46,652
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	83,230	52,822	83,230	52,822	21,293
Real estate \| Multi-family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7,689	9,084	7,948	11,260	11,260
Provision for Credit Loss	(703)	317	(962)	(1,859)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	6,986	9,401	6,986	9,401	7,948
Real estate \| Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	22,848	26,541	26,323	42,319	42,319
Provision for Credit Loss	6,456	532	2,981	(15,246)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	29,304	27,073	29,304	27,073	26,323
Commercial installment \| Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	51,140	45,630	44,972	44,752	44,752
Provision for Credit Loss	(6,395)	896	(227)	1,774
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending Balance	44,745	46,526	44,745	46,526	44,972
Consumer \| Marine and recreational
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	275,279	223,862	241,624	183,492	183,492
Provision for Credit Loss	(4,593)	5,760	38,951	69,537
Charge-offs	0	0	(9,889)	(23,407)
Recoveries	0	0	0	0
Ending Balance	270,686	229,622	270,686	229,622	241,624
Consumer \| Other consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	34,595	29,400	26,644	24,056	24,056
Provision for Credit Loss	(678)	972	6,272	4,742
Charge-offs	0	0	0	0
Recoveries	199	600	1,200	2,174
Ending Balance	$ 34,116	$ 30,972	$ 34,116	$ 30,972	$ 26,644

EWSB Bancorp, Inc. /MD/ 10-Q