Investments In Real Estate (Schedule Of Real Estate Property Acquisitions) (Details) (USD $)	1 Months Ended	9 Months Ended
	Oct. 31, 2013	Sep. 30, 2013
Business Acquisition [Line Items]
Purchase price		$ 152,900,000	[1]
Land held for sale		11,015,000
17201 Waterview Parkway [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Dallas, Texas
Purchase price		8,500,000	[1]
Acquisition, Date Acquired		Jan. 31, 2013
1900 S. Price Road [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Phoenix, Arizona
Purchase price		24,000,000	[1]
Acquisition, Date Acquired		Jan. 31, 2013
371 Gough Road [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Toronto, Canada
Purchase price		8,400,000	[1]
Acquisition, Date Acquired		Mar. 12, 2013
1500 Towerview Road [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Minneapolis, Minnesota
Purchase price		37,000,000	[1]
Acquisition, Date Acquired		Mar. 27, 2013
Cartech [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		London, England	[2],[3]
Purchase price		3,600,000	[1],[2],[3]
Acquisition, Date Acquired		Apr. 02, 2013	[2],[3]
MetCenter Business Park [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Austin, Texas	[4]
Purchase price		31,900,000	[1],[4]
Acquisition, Date Acquired		May 20, 2013	[4]
Liverpoolweg 10 [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Amsterdam, Netherlands	[5]
Purchase price	2,600,000	3,900,000	[1],[5]
Acquisition, Date Acquired		Jun. 27, 2013	[5]
Expected payment in November 2013		1,300,000
Saito Industrial Park [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Osaka, Japan	[2]
Purchase price		9,600,000	[1],[2]
Acquisition, Date Acquired		Aug. 09, 2013	[2]
Principal Park [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		London, England	[2],[3]
Purchase price		19,300,000	[1],[2],[3]
Acquisition, Date Acquired		Sep. 23, 2013	[2],[3]
De President, Hoofddorp [Member]
Business Acquisition [Line Items]
Acquisition, Metropolitan Area		Amsterdam, Netherlands	[2]
Purchase price		$ 6,700,000	[1],[2]
Acquisition, Date Acquired		Sep. 24, 2013	[2]

[1] Purchase prices are all in U.S. dollars and exclude capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition.

[2] Represents currently vacant land which is not included in our operating property count.

[3] Portions of each land parcel were sold or are to be sold during the three months ended December 31, 2013. The cost basis of the land held for sale was approximately $11.0 million and is disclosed separately on the condensed consolidated balance sheet.

[4] MetCenter Business Park consists of three buildings at 8201 E. Riverside Drive and three buildings at 7401 E. Ben White Boulevard in the Austin metropolitan area. MetCenter Business Park is considered one property for our property count.

[5] Acquisition of a partially-built data center in Groningen, Netherlands for a purchase price of $3.9 million.  We paid an additional $2.6 million in October 2013 upon completion of construction by the tenant, with a final payment of $1.3 million expected to be paid in November 2013.