XML 52 R42.htm IDEA: XBRL DOCUMENT
v3.21.2

MERGER (Details) $ / shares in Units, $ in Millions | Feb. 01, 2021 USD ($) $ / shares shares | Jan. 31, 2021 shares | Sep. 30, 2021 $ / shares | Dec. 31, 2020 $ / shares | Sep. 30, 2015 USD ($)
--- | --- | --- | --- | --- | ---
MERGER |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 |  | $ 0.01 | $ 0.01 |
Share conversion ratio | 0.6480 |  |  |  |
Preferred stock, Series A, par value (in dollars per share) |  |  | $ 0.01 | $ 0.01 |
Aggregate principal amount | $ |  |  |  |  | $ 80.0
Preferred Stock |  |  |  |  |
MERGER |  |  |  |  |
Share conversion ratio | 1 |  |  |  |
Legacy Dime |  |  |  |  |
MERGER |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 |  |  |  |
Aggregate principal amount | $ | $ 115.0 |  |  |  |
Fixed interest rate of debentures | 4.50% |  |  |  |
Legacy Dime | Preferred Stock |  |  |  |  |
MERGER |  |  |  |  |
Preferred stock, Series A, par value (in dollars per share) | $ 0.01 |  |  |  |
Merger Agreement |  |  |  |  |
MERGER |  |  |  |  |
Number of Bridge Outstanding Shares | shares |  | 41,226,000 |  |  |
Percentage Ownership |  | 100.00% |  |  |
Merger Agreement | Bridge shareholders |  |  |  |  |
MERGER |  |  |  |  |
Number of Bridge Outstanding Shares | shares | 21,200,000 | 19,993,000 |  |  |
Percentage Ownership | 51.50% | 48.50% |  |  |
Merger Agreement | Legacy Dime shareholders |  |  |  |  |
MERGER |  |  |  |  |
Number of Bridge Outstanding Shares | shares | 30,853,000 | 21,233,000 |  |  |
Percentage Ownership |  | 51.50% |  |  |

X
- Definition Ratio applied to the conversion of stock. + References No definition available. + Details
Name: | dcom_StockholdersEquityNoteConversionRatio
Namespace Prefix: | dcom_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=dcom_LegacyDimeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=dcom_MergerAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=dcom_BridgeBancorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=dcom_DimeCommunityBancsharesInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |