Annual report pursuant to Section 13 and 15(d)

Derivative Instruments - (Details Textual)

v3.7.0.1
Derivative Instruments - (Details Textual)
lb in Millions, gal in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
lb
gal
Derivative Instruments, Gain (Loss) [Line Items]  
Heating oil covered under the open commodity derivative contracts (in gallons) | gal 45.4
Soybean oil covered under the open commodity derivative contracts (in pounds) | lb 41.0
Net position $ 2,239,000
Commodity contract derivatives  
Derivative Instruments, Gain (Loss) [Line Items]  
Collateral associated with commodity-based derivatives $ 9,366,000