XML 22 R55.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Indebtedness - Schedule of Outstanding Debts (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018 | Feb. 28, 2018
--- | --- | --- | ---
Unsecured debt |  |  |
Debt Instrument [Line Items] |  |  |
Total unsecured floating rate debt | $ 987,500,000 | $ 689,000,000 |
Debt issuance costs, net | 1,259,000 | 1,714,000 |
Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuance costs, net | 21,037,000 | 23,081,000 |
Face Amount | 1,850,000,000 | 2,250,000,000 |
Unamortized Discount | 8,282,000 | 9,974,000 |
Unsecured Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured revolving credit facility, maximum borrowing capacity | 1,000,000,000 |  |
Unsecured Revolving Credit Facility | Unsecured debt |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured revolving credit facility | 537,500,000 | 139,000,000 |
Unsecured revolving credit facility, maximum borrowing capacity | 1,000,000,000 |  |
Unsecured term loan due January 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Face Amount | 350,000,000 |  |
Unsecured term loan due January 2020 | Unsecured debt |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured term loans | 0 | 350,000,000 |
Unsecured term loan due June 2020 | Unsecured debt |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured term loans | 250,000,000 | 0 |
Unsecured term loan due September 2022 | Unsecured debt |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured term loans | $ 200,000,000 | 200,000,000 |
Senior unsecured notes due 2019 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 3.25% |  |
Face Amount | $ 0 | 400,000,000 |
Unamortized Discount | $ 0 | 19,000 |
Senior unsecured notes due 2020 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 6.75% |  |
Face Amount | $ 200,000,000 | 200,000,000 |
Unamortized Discount | $ 59,000 | 274,000 |
Senior unsecured notes due 2021 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 6.75% |  |
Face Amount | $ 300,000,000 | 300,000,000 |
Unamortized Discount | $ 1,024,000 | 1,558,000 |
Senior unsecured notes due 2024 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 4.75% |  |
Face Amount | $ 250,000,000 | 250,000,000 |
Unamortized Discount | $ 342,000 | 421,000 |
Senior unsecured notes due 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Coupon |  |  | 4.75%
Face Amount |  |  | $ 500,000
Senior unsecured notes due 2028 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 4.75% |  |
Face Amount | $ 500,000,000 | 500,000,000 |
Unamortized Discount | $ 6,857,000 | 7,702,000 |
Senior unsecured notes due 2042 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 5.625% |  |
Face Amount | $ 350,000,000 | 350,000,000 |
Unamortized Discount | $ 0 | 0 |
Senior unsecured notes due 2046 | Senior unsecured notes |  |  |
Debt Instrument [Line Items] |  |  |
Coupon | 6.25% |  |
Face Amount | $ 250,000,000 | 250,000,000 |
Unamortized Discount | $ 0 | $ 0 |

X
- Definition Long-term Line of Credit and Long-term Debt, Total + References No definition available. + Details
Name: | dhc_LongtermLineofCreditandLongtermDebtTotal
Namespace Prefix: | dhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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=114775744&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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 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_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: 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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600 + Details
Name: | us-gaap_LongTermLineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=dhc_SeniorUnsecuredNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_UnsecuredTermLoanDueJanuary2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_UnsecuredTermLoanDueJune2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_UnsecuredTermLoanDueSeptember2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes3.25PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes6.75PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes6.75PercentDue2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes4.75PercentDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes4.75PercentDue2028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes5.625PercentDue2042Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=dhc_SeniorUnsecuredNotes6.25DueIn2046Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |