Number of Locations, Gross Leasable Area and Percentage of Minimum Rent for Major Tenants (Detail)	Sep. 30, 2012	Sep. 30, 2011
Sun Microsystems
Revenue, Major Customer [Line Items]
Number of locations	1	1
GLA	249,832	249,832
% of Minimum Rent	28.00%	26.00%
Sears
Revenue, Major Customer [Line Items]
Number of locations	5	6
GLA	497,445	619,120
% of Minimum Rent	15.00%	17.00%
CVS
Revenue, Major Customer [Line Items]
Number of locations	5	5
GLA	56,770	56,770
% of Minimum Rent	10.00%	15.00%