XML 51 R39.htm IDEA: XBRL DOCUMENT
v3.25.1

BASIS OF PRESENTATION (Details) | 3 Months Ended
--- | ---
Mar. 31, 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

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