Commitments And Contingencies (Details)			9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 GBP (£)	Sep. 30, 2012 350 East Cermak Road [Member] USD ($)	Sep. 30, 2011 350 East Cermak Road [Member] USD ($)	Sep. 30, 2012 29 A International Business Park [Member] USD ($)	Sep. 30, 2012 29 A International Business Park [Member] SGD	Sep. 30, 2012 Convergence Business Park [Member] USD ($)
Commitments and Contingencies [Line Items]
Rental revenue sharing agreement, maximum per month			$ 135,000
Space held for redevelopment (in square feet)			192,000
Lease expiration, date			May 01, 2012
Payments made as part of revenue sharing agreement			700,000	1,200,000
Additional performance based consideration earned (maximum)						50,000,000
Additional performance based consideration earned (maximum), adjusted for exchange rate					40,700,000
Expiration of earnout contingency					November 2020	November 2020
Lease expiration period							April 2017
Sale price of building							24,000,000
Real estate price, per square acre							225,000
Expected fair value of contingent consideration	91,300,000	56,500,000
Commitments related to construction contracts	$ 187,300,000