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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]  
Realized gains (losses) on derivatives not designated as hedging instruments

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Three Months Ended

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Six Months Ended

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March 31, 

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March 31, 

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2020

    

2019

    

2020

    

2019

    

Realized gains (losses) on derivatives not designated as hedging instruments

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$

4,424

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$

(3,831)

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$

756

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$

(854)

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