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

Concentration Risk Percentage for Termination Right, Exercisable Next Twelve Months

No definition available.

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

Concentration Risk Percentage for Termination Right Exercisable in Year Eight

No definition available.

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

Concentration Risk Percentage for Termination Right, Exercisable in Year Seven

No definition available.

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

Concentration Risk Percentage for Termination Right, Exercisable in Year Ten

No definition available.

Name:	gov_ConcentrationRiskPercentageforTerminationRightExercisableinYearTen
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

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=84177426&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=77997519&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=84177426&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=77997519&loc=d3e13537-108611

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717