Area of land held.

No definition available.

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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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- Definition

Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 40
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.U.Q2)
-URI http://asc.fasb.org/extlink&oid=6955272&loc=d3e221323-122791

+ Details

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2941-110230

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

+ Details

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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Subsequent Events (Details) $ in Thousands, ft² in Millions		1 Months Ended	3 Months Ended		6 Months Ended
Subsequent Events (Details) $ in Thousands, ft² in Millions	Jul. 01, 2017 USD ($)	Jul. 27, 2017 USD ($) ft² a bldg	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Subsequent Event [Line Items]
Proceeds from Sale of Buildings and Land					$ 26,220	$ 139,814
Gain on property dispositions			$ 5,895	$ 3,832	6,702	$ 24,353
2015 sales [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Gain on property dispositions	$ 14,300
Other Liabilities [Member] \| 2015 sales [Member]
Subsequent Event [Line Items]
Deferred Gain on Sale of Property			$ 14,300		$ 14,300
Lehigh Central PA [Member] \| Disposal, Exercised Purchase Option [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Number of Real Estate Properties \| bldg		2
square feet \| ft²		1.7
Acres of developable land \| a		44
Proceeds from Sale of Buildings and Land		$ 249,000
Lehigh Central PA [Member] \| Minimum [Member] \| Disposal, Exercised Purchase Option [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Gain on property dispositions		65,000
Lehigh Central PA [Member] \| Maximum [Member] \| Disposal, Exercised Purchase Option [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Gain on property dispositions		$ 70,000