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Fees and Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2012
Fees and Related Party Transactions [Abstract]  
Brokerage fees
Each Class of the GAIT Funds other than Class M pays the Manager a brokerage fee (the "Brokerage Fee") at the annual rate specified in the table below. This Brokerage Fee is payable monthly in arrears and calculated as of the last business day of each month in the same manner as the Advisory Fee.
 
Class
Annual Rate
   
Class 0
2%
Class 2
4%