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v3.23.3

BASIS OF PRESENTATION (Details) | 1 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 subsidiary | Sep. 30, 2023 location
SUMMARY OF ACCOUNTING POLICIES |  |
Number of real estate investments dissolved | subsidiary | 2 |
Number of branch locations | location |  | 60

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Namespace Prefix: | dcom_
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Balance Type: | na
Period Type: | duration

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

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration