XML 60 R54.htm IDEA: XBRL DOCUMENT
v3.25.1

Commitments and Contingencies - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract] |  |  |
Maximum potential amount of bank obligation | $ 50,000 |  | $ 50,000
Letter of credit outstanding term | 1 year |  |
Allowance for off balance sheet loan losses | $ 618,000 |  | $ 634,000
Provision (benefit) for off-balance sheet commitments | $ 16,000 | $ 68,000 |

X
- Definition Allowance for off balance sheet loan losses. + References No definition available. + Details
Name: | ecbk_AllowanceForOffBalanceSheetLoanLosses
Namespace Prefix: | ecbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Letter of credit outstanding term. + References No definition available. + Details
Name: | ecbk_LetterOfCreditOutstandingTerm
Namespace Prefix: | ecbk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of bank obligation. + References No definition available. + Details
Name: | ecbk_MaximumPotentialAmountOfBankObligation
Namespace Prefix: | ecbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration