XML 45 R37.htm IDEA: XBRL DOCUMENT v3.21.2

Long-term debt, current and non-current, textuals 3 (Details)					6 Months Ended
	Jul. 16, 2018 USD ($)	May 19, 2015 USD ($)	Dec. 19, 2014 USD ($)	Jan. 13, 2014 USD ($)	Jun. 30, 2021 USD ($) installment	Jun. 29, 2020 USD ($)
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis					LIBOR plus margin
Commonwealth Bank of Australia, London Branch [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Proceeds From Issuance Of Secured Debt				$ 9,500,000
Debt Instrument, Number of installments | installment					32
Debt Instrument, Frequency of Periodic Payments					quarterly
Debt Instrument, Periodic Payment, Principal					$ 156,000
Debt Instrument, Balloon Payment					$ 4,500,000
Debt Instrument, Maturity Date					Jan. 13, 2022
Loan Margin Percentage					2.25%
BNP Paribas [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Proceeds From Issuance Of Secured Debt			$ 53,500,000
Debt Instrument, Number of installments | installment					14
Debt Instrument, Periodic Payment, Principal					$ 1,574,000
Debt Instrument, Balloon Payment					$ 31,466,000
Debt Instrument, Maturity Date					Nov. 30, 2021
Debt Instrument, Description of Variable Rate Basis					LIBOR
Loan Margin Percentage					2.00%
BNP Paribas [Member] | Secured Debt [Member] | First Tranche [Member]
Debt Instrument [Line Items]
Proceeds From Issuance Of Secured Debt	$ 75,000,000
Debt Instrument, Number of installments | installment					20
Debt Instrument, Frequency of Periodic Payments					quarterly
Debt Instrument, Periodic Payment, Principal					$ 1,562,500
Debt Instrument, Balloon Payment					$ 43,750,000
Debt Instrument, Maturity Date					Jul. 16, 2023
Debt Instrument, Description of Variable Rate Basis					LIBOR
Loan Margin Percentage					2.30%
BNP Paribas [Member] | Secured Debt [Member] | Second Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Number of installments | installment					5
Debt Instrument, Frequency of Periodic Payments					semi-annual
Debt Instrument, Periodic Payment, Principal					$ 1,574,000
Debt Instrument, Balloon Payment					$ 23,596,000	$ 31,466,000
Debt Instrument, Maturity Date					May 19, 2024
Loan Margin Percentage					2.50%
Nordea Bank AB, London Branch [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Proceeds From Issuance Of Secured Debt		$ 93,080,000
Debt Instrument, Number of installments | installment					24
Debt Instrument, Frequency of Periodic Payments					quarterly
Debt Instrument, Periodic Payment, Principal					$ 1,862,000
Debt Instrument, Balloon Payment					$ 48,402,000
Debt Instrument, Maturity Date					Mar. 19, 2021
Loan Margin Percentage					2.10%
Nordea Bank AB, London Branch [Member] | Secured Debt [Member] | Second Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Number of installments | installment					8
Debt Instrument, Frequency of Periodic Payments					quarterly
Debt Instrument, Periodic Payment, Principal					$ 1,862,000
Debt Instrument, Balloon Payment					$ 40,955,000
Debt Instrument, Maturity Date					Mar. 19, 2022
Debt Instrument, Description of Variable Rate Basis					LIBOR
Loan Margin Percentage					2.25%

X

- Definition

Number of required installments under the debt agreement.

+ References

No definition available.

+ Details

Name:	dsx_DebtInstrumentNumberOfInstallments
Namespace Prefix:	dsx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ 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)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentFrequencyOfPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the required periodic payments applied to principal.

+ 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)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=dsx_CommonWealthBankOfAustraliaLondonBranchMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=dsx_BnpParibasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dsx_StatementsScenarios1Axis=dsx_FirstTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dsx_StatementsScenarios1Axis=dsx_SecondAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=dsx_NordeaBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: