XML 96 R80.htm IDEA: XBRL DOCUMENT
v3.24.0.1

LOANS HELD FOR INVESTMENT, NET - Financial effect of the modifications to borrowers experiencing financial difficulty (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Weighted Average Interest Rate Reductions | 4.27%
Weighted Average months of Term Extensions | 202 months
Weighted Average Payment Delay or Principal Forgiveness | $ 3,470
One-to-four family residential and cooperative/condominium apartment |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Weighted Average months of Term Extensions | 189 months
Weighted Average Payment Delay or Principal Forgiveness | $ 76
Commercial real estate ("CRE") |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Weighted Average Payment Delay or Principal Forgiveness | $ 988
Commercial and Industrial ("C&I") Loans |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Weighted Average Interest Rate Reductions | 4.27%
Weighted Average months of Term Extensions | 13 months
Weighted Average Payment Delay or Principal Forgiveness | $ 2,406

X
- Definition Amount of weighted average payment delay or principal forgiveness of financing receivable modified for debtor experiencing financial difficulty. + References No definition available. + Details
Name: | dcom_FinancingReceivableModifiedWeightedAveragePaymentDelayOrPrincipalForgiveness
Namespace Prefix: | dcom_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A + Details
Name: | us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A + Details
Name: | us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=dcom_OneToFourFamilyResidentialAndCooperativeUnitAllowanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |