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v3.24.3

BASIS OF PRESENTATION (Details) | 9 Months Ended
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Sep. 30, 2024 location
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