Note 4 - Ground-Up Development (Detail)	Jun. 30, 2012	Dec. 31, 2011
Number of Real Estate Properties	29	690
Gound-up Development [Member] | United States [Member]
Number of Real Estate Properties	2
Gound-up Development [Member] | Mexico [Member]
Number of Real Estate Properties	1
Gound-up Development [Member] | Peru [Member]
Number of Real Estate Properties	1
Gound-up Development [Member]
Number of Real Estate Properties	4