XML 61 R45.htm IDEA: XBRL DOCUMENT
v3.22.0.1

DERIVATIVES AND HEDGING ACTIVITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Derivatives, Fair Value [Line Items] |
Effect of Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) | The table below presents the effect of the cash flow hedge accounting on accumulated other comprehensive loss as of December 31, 2021, 2020 and 2019.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands) | ​ | 2021 |  | 2020 |  | 2019
Gain (loss) recognized in other comprehensive income | ​ | $ | 5,277 | ​ | $ | (24,449) | ​ | $ | (8,254)
Gain recognized on termination of derivatives | ​ | ​ | 16,505 | ​ | ​ | 6,596 | ​ | ​ | —
(Loss) gain reclassified from other comprehensive income into interest expense | ​ |  | (940) | ​ |  | (6,127) | ​ |  | 955
Designated as Hedging Instrument |
Derivatives, Fair Value [Line Items] |
Fair Value of Derivative Financial Instruments and Classification on Consolidated Statements of Financial Condition | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021 | ​ | December 31, 2020
​ | ​ | ​ | ​ | Notional | ​ | Fair Value | ​ | Fair Value | ​ | ​ | ​ | Notional | ​ | Fair Value | ​ | Fair Value
(Dollars in thousands) |  | Count |  | Amount |  | Assets |  | Liabilities |  | Count |  | Amount |  | Assets |  | Liabilities
Included in derivative assets/(liabilities): |  |  |  | ​ |  |  | ​ |  |  | ​ |  |  |  |  | ​ |  |  | ​ |  |  | ​ |
Interest rate swaps related to FHLBNY advances |  | 4 | ​ | $ | 150,000 | ​ | $ | 4,358 | ​ | $ | — |  | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
Interest rate swaps related to FHLBNY advances |  | — | ​ | $ | — | ​ | $ | — | ​ | $ | — |  | 32 | ​ | $ | 655,000 | ​ | $ | — | ​ | $ | (18,442)
Not Designated as Hedging Instrument [Member] |
Derivatives, Fair Value [Line Items] |
Fair Value of Derivative Financial Instruments and Classification on Consolidated Statements of Financial Condition | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ | ​ | ​ | ​ | Notional | ​ | Fair Value | ​ | Fair Value
(In thousands) |  | Count |  | Amount |  | Assets |  | Liabilities
Included in derivative assets/(liabilities): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loan level interest rate swaps with borrower |  | 111 | ​ | $ | 604,529 | ​ | $ | 28,291 | ​ | $ | —
Loan level interest rate swaps with borrower |  | 74 | ​ |  | 620,459 | ​ |  | — | ​ |  | (11,865)
Loan level interest rate floors with borrower | ​ | 45 | ​ | ​ | 392,764 | ​ | ​ | — | ​ | ​ | (5,644)
Loan level interest rate swaps with third-party counterparties |  | 111 | ​ |  | 604,529 | ​ |  | — | ​ |  | (28,291)
Loan level interest rate swaps with third-party counterparties | ​ | 74 | ​ | ​ | 620,459 | ​ | ​ | 11,865 | ​ | ​ | —
Loan level interest rate floors with third-party counterparties |  | 45 | ​ |  | 392,764 | ​ |  | 5,644 | ​ |  | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | Notional | ​ | Fair Value | ​ | Fair Value
(In thousands) |  | Count |  | Amount |  | Assets |  | Liabilities
Included in derivative assets/(liabilities): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loan level interest rate swaps with borrower |  | 65 | ​ | $ | 570,277 | ​ | $ | 24,764 | ​ | $ | —
Loan level interest rate floors with borrower |  | 41 | ​ |  | 364,643 | ​ |  | — | ​ |  | (5,832)
Loan level interest rate swaps with third-party counterparties |  | 65 | ​ |  | 570,277 | ​ |  | — | ​ |  | (24,764)
Loan level interest rate floors with third-party counterparties |  | 41 | ​ |  | 364,643 | ​ |  | 5,832 | ​ |  | —
Loan Level Derivative Income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands) |  | 2021 |  | 2020 | ​ | 2019
Loan level derivative income | ​ | $ | 2,909 | ​ | $ | 8,872 | ​ | $ | 910

X
- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in loan level derivative income. + References No definition available. + Details
Name: | dcom_LoanLevelDerivativeIncomeTextBlock
Namespace Prefix: | dcom_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
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_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |