Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearEight
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as a concentration risk for termination right exercisable in year five from the balance sheet date.

No definition available.

Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearFive
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as a concentration risk for termination right exercisable in year four from the balance sheet date.

No definition available.

Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearFour
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as a concentration risk for termination right exercisable in year nine from the balance sheet date.

No definition available.

Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearNine
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as a concentration risk for termination right exercisable in year six from the balance sheet date.

No definition available.

Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearSix
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as a concentration risk for termination right exercisable in year three from the balance sheet date.

No definition available.

Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearThree
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as a concentration risk for termination right exercisable in year two from the balance sheet date.

No definition available.

Name:	gov_ConcentrationRiskPercentageForTerminationRightExercisableInYearTwo
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents number of government tenants with right to terminate their lease.

No definition available.

Name:	gov_NumberOfGovernmentTenantsExercisableRightToTerminate
Namespace Prefix:	gov_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the number of state governments that are tenants of the entity.

No definition available.

Name:	gov_NumberOfStateGovernments
Namespace Prefix:	gov_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Percentage of the total future minimum lease payments for government tenants with currently exercisable rights to terminate their leases before the stated expiration if funding is not approved.

No definition available.

Name:	gov_UnfundedTerminationFutureMinimumLeasePaymentPercent
Namespace Prefix:	gov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

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

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611