Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2011

Related Party Transactions [Abstract]

Schedule of Fees Earned from Related Parties

The following table summarizes the fees earned from these companies for the years ended December 31, 2011, 2010 and 2009, respectively (in thousands): 

	2011		2010		2009
Management fees	$	10,090	$	7,620	$	8,421
Leasing fees	4,417		2,700		4,220
Construction and development fees	6,711		10,257		10,168