Washington Real Estate Investment Trust Annual report pursuant to Section 13 and 15(d)

Total principal

$ 414,500us-gaap_DebtInstrumentCarryingAmount

747,208us-gaap_NotesPayable

846,703us-gaap_NotesPayable

Unsecured Debt [Member]

Total principal

750,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Net unamortized discount

(2,792)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Unsecured Debt [Member] | 10 Year Unsecured Notes 5.359% [Member]

747,208us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

5.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes5359Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

5.359%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes5359Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

^[1]

50,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes5359Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Unsecured Debt [Member] | 10 Year Unsecured Notes 5.49% [Member]

May 01, 2015

^[2]

5.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes549Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

5.49%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes549Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

^[1]

100,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes549Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Unsecured Debt [Member] | 10 Year Unsecured Notes 5.053% [Member]

May 01, 2015

^[2]

4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes5053Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

5.053%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes5053Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

^[1]

250,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes5053Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Unsecured Debt [Member] | 10 Year Unsecured Notes 3.950 % [Member]

Oct. 01, 2020

^[2]

3.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= wre_ThreePointNineFivePercentUnsecuredNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

4.018%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= wre_ThreePointNineFivePercentUnsecuredNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

^[1]

300,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= wre_ThreePointNineFivePercentUnsecuredNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Unsecured Debt [Member] | 20 Year Unsecured Notes [Member]

Oct. 15, 2022

^[2]

7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= wre_A20YearUnsecuredNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

7.36%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= wre_A20YearUnsecuredNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

^[1]

$ 50,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= wre_A20YearUnsecuredNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

Unsecured Debt [Member] | 10 Year Unsecured Notes 5.125% [Member]

Feb. 25, 2028

^[2]

Long-term Debt, Maturities, Repayment Terms

100000

Unsecured Debt [Member] | 10 Year Unsecured Notes 5.34% [Member]

5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= wre_A10YearUnsecuredNotes534Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember

[1]	Yield on issuance date, including the effects of discounts on the notes.
[2]	No principal amounts are due prior to maturity.

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-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

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-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

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-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=6877327&loc=d3e13212-122682

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

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13, 16

-Article 9