XML 49 R39.htm IDEA: XBRL DOCUMENT
v3.25.2

BASIS OF PRESENTATION (Details) | 6 Months Ended
--- | ---
Jun. 30, 2025 location
BASIS OF PRESENTATION |
Number of branch locations | 62

X
- Definition The number of full service retail banking offices at period end. + References No definition available. + Details
Name: | dcom_NumberOfRetailOffices
Namespace Prefix: | dcom_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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