Real estate impairment (Details) (USD $)	3 Months Ended
	Sep. 30, 2011
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Real Estate	$ 37,000,000
Impairment of Real Estate and Long-Lived Assets Held-for-use	38,546,000
Porto Cupecoy [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 1,677,000