XML 109 R86.htm IDEA: XBRL DOCUMENT
v3.25.0.1

DEPOSITS - Summary of Deposits (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deposits. |  |
Weighted Average Rate, Savings accounts | 2.98% | 3.67%
Weighted Average Rate, CDs | 3.73% | 4.43%
Weighted Average Rate, Money market accounts | 3.01% | 3.46%
Weighted Average Rate, Interest-bearing checking accounts | 1.92% | 0.77%
Weighted Average Rate, Total | 2.09 | 2.56
Liability, Savings accounts | $ 1,927,909 | $ 2,335,490
Liability, CDs | 1,069,081 | 1,607,683
Liability, Money market accounts | 4,198,784 | 3,125,996
Liability, Interest-bearing checking accounts | 1,079,823 | 515,987
Liability, Non-interest bearing checking accounts | 3,410,544 | 2,945,499
Liability, Total | $ 11,686,141 | $ 10,530,655

X
- Definition The weighted average interest rate for deposit liabilities. + References No definition available. + Details
Name: | dcom_WeightedAverageRateDomesticDepositDeposits
Namespace Prefix: | dcom_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_Deposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of interest-bearing domestic certificate of deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest-bearing domestic checking deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_InterestBearingDomesticDepositChecking
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest-bearing domestic money market demand account deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_InterestBearingDomesticDepositMoneyMarket
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest-bearing domestic savings deposit liabilities. Saving deposits bear interest and have no stated maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_InterestBearingDomesticDepositSavings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of noninterest-bearing domestic checking deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_NoninterestBearingDomesticDepositChecking
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The weighted average interest rate for domestic certificates of deposit liabilities. + References No definition available. + Details
Name: | us-gaap_WeightedAverageRateDomesticDepositCertificatesOfDeposit
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average interest rate for domestic checking deposit liabilities. + References No definition available. + Details
Name: | us-gaap_WeightedAverageRateDomesticDepositChecking
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average interest rate for domestic money market demand account deposit liabilities. + References No definition available. + Details
Name: | us-gaap_WeightedAverageRateDomesticDepositMoneyMarket
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average interest rate for domestic savings deposit liabilities. + References No definition available. + Details
Name: | us-gaap_WeightedAverageRateDomesticDepositSavings
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant