Derivative Instruments And Hedging Activities Notional Contracts by Derivative Type (Details)	9 Months Ended
	Sep. 30, 2019 USD ($) MMBTU bbl XPT ( )
Platinum, Ounces
Economic hedges by derivative type [Line Items]
Derivative forward contract - platinum |	41,147
Designated as Hedging Instrument [Member] | Natural Gas [Member]
Economic hedges by derivative type [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	4,050,000
Designated as Hedging Instrument [Member] | Price Risk Derivative [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	5,954,000
Designated as Hedging Instrument [Member] | Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	423,739
Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Natural Gas [Member]
Economic hedges by derivative type [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	450,000
Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Price Risk Derivative [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	1,196,000
Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	423,739
Designated as Hedging Instrument [Member] | Maturing in Year Two [Member] | Natural Gas [Member]
Economic hedges by derivative type [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	1,800,000
Designated as Hedging Instrument [Member] | Maturing in Year Two [Member] | Price Risk Derivative [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	4,758,000
Designated as Hedging Instrument [Member] | Maturing in Year Three [Member] | Natural Gas [Member]
Economic hedges by derivative type [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	1,800,000
Designated as Hedging Instrument [Member] | Maturing in Year Three [Member] | Price Risk Derivative [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	0
Not Designated as Hedging Instrument [Member]
Economic hedges by derivative type [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net | $	$ 434,443,896
Not Designated as Hedging Instrument [Member] | WTI Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	200,000
Not Designated as Hedging Instrument [Member] | Forward gasoline and diesel contracts [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	538,500
Not Designated as Hedging Instrument [Member] | Physical contracts - long [Domain]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	350,000
Not Designated as Hedging Instrument [Member] | Physical contracts - short [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	350,000
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	140,849
Not Designated as Hedging Instrument [Member] | Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	1,464,000
Not Designated as Hedging Instrument [Member] | NYMEX WTI Short [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	1,825,000
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member]
Economic hedges by derivative type [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net | $	$ 114,213,501
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | WTI Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	200,000
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Forward gasoline and diesel contracts [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	538,500
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Physical contracts - long [Domain]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	350,000
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Physical contracts - short [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	350,000
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Platinum, Ounces
Economic hedges by derivative type [Line Items]
Derivative forward contract - platinum |	41,147
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Forward Contracts [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	140,849
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	0
Not Designated as Hedging Instrument [Member] | Maturing in Next Twelve Months [Member] | NYMEX WTI Short [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	1,713,000
Not Designated as Hedging Instrument [Member] | Maturing in Year Two [Member]
Economic hedges by derivative type [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net | $	$ 320,230,395
Not Designated as Hedging Instrument [Member] | Maturing in Year Two [Member] | Crude Oil [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	1,464,000
Not Designated as Hedging Instrument [Member] | Maturing in Year Two [Member] | NYMEX WTI Short [Member]
Economic hedges by derivative type [Line Items]
Price Risk Fair Value Hedge Derivative, at Fair Value, Net	112,000