Statements of Changes in Shareholders' Equity (USD $)
Total
Retained Earnings
Cumulative Translation Adjustment
Cumulative Translation Adjustment, Beginning of Year at Oct. 31, 2009       
Retained Earnings, Beginning of Year at Oct. 31, 2009       
Net Income 21,506,266 21,506,266  
Distributions Paid   (20,831,349)  
Adjustment of redeemable capital shares to redemption value   (674,917)  
Currency translation adjustment     479,267
Adjustment of redeemable capital shares to redemption value     (479,267)
Cumulative Translation Adjustment, End of Year at Oct. 31, 2010       
Retained Earnings, End of Year at Oct. 31, 2010       
Net Income 30,565,349 30,565,349  
Distributions Paid   (30,011,685)  
Adjustment of redeemable capital shares to redemption value   (553,664)  
Currency translation adjustment     967,891
Adjustment of redeemable capital shares to redemption value     (967,891)
Cumulative Translation Adjustment, End of Year at Oct. 31, 2011       
Retained Earnings, End of Year at Oct. 31, 2011        
Net Income 22,792,149 22,792,149  
Distributions Paid   (23,954,507)  
Adjustment of redeemable capital shares to redemption value   1,162,358  
Currency translation adjustment     421,050
Adjustment of redeemable capital shares to redemption value     (421,050)
Cumulative Translation Adjustment, End of Year at Oct. 31, 2012       
Retained Earnings, End of Year at Oct. 31, 2012