Real Estate and Intangibles - Summary of Scheduled Amortization Market Lease Intangibles (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Acquired Above-Market Lease Intangibles
2023	$ 1,177
2024	1,129
2025	1,097
2026	1,096
2027	1,096
Acquired Below-Market Lease Intangibles
2023	(3,907)
2024	(2,938)
2025	(2,246)
2026	(2,008)
2027	$ (1,783)

Above market lease amortization income maturity schedule.

No definition available.

Name:	dea_AboveMarketLeaseAmortizationIncomeMaturityScheduleAbstract
Namespace Prefix:	dea_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Above market lease amortization income remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	dea_AboveMarketLeaseAmortizationIncomeRemainderOfFiscalYear
Namespace Prefix:	dea_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Above market lease amortization income year five.

+ References

No definition available.

+ Details

Name:	dea_AboveMarketLeaseAmortizationIncomeYearFive
Namespace Prefix:	dea_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Above market lease amortization income year four.

+ References

No definition available.

+ Details

Name:	dea_AboveMarketLeaseAmortizationIncomeYearFour
Namespace Prefix:	dea_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Above market lease amortization income year three.

+ References

No definition available.

+ Details

Name:	dea_AboveMarketLeaseAmortizationIncomeYearThree
Namespace Prefix:	dea_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Above market lease amortization income year two.

+ References

No definition available.

+ Details

Name:	dea_AboveMarketLeaseAmortizationIncomeYearTwo
Namespace Prefix:	dea_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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

- Definition

Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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

- Definition

Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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

- Definition

Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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

- Definition

Amount of amortization income for lease with finite life acquired as part of real property acquisition at below market lease rate expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

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