XML 59 R43.htm IDEA: XBRL DOCUMENT
v3.22.0.1

RESTRICTED STOCK (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
RESTRICTED STOCK |
Summary of restricted stock | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In thousands) |  | December 31, 2021 |  | December 31, 2020
FHLBNY capital stock | ​ | $ | 12,819 | ​ | $ | 60,707
FRB capital stock | ​ |  | 24,748 | ​ |  | —
Bankers' Bank capital stock | ​ |  | 165 | ​ |  | —
Restricted stock | ​ | $ | 37,732 | ​ | $ | 60,707

X
- Definition Tabular disclosure for restricted investments. + References No definition available. + Details
Name: | dcom_RestrictedInvestmentsTableTextBlock
Namespace Prefix: | dcom_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Restricted Stock [Abstract] + References No definition available. + Details
Name: | dcom_RestrictedStockAbstract
Namespace Prefix: | dcom_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration