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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2011
Subsequent Events [Abstract]
Subsequent Events	7 - Subsequent Events In connection with the preparation of the financial statements of the Trust as of and for the period ended December 31, 2011, management has evaluated the impact of all subsequent events through the date the financial statements were issued, and has determined that there were no subsequent events requiring adjustment or disclosure in the financial statements.