5. Derivatives (Tables)

9 Months Ended

Sep. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivatives Not Designated as Hedging Instruments

	As of September 30, 2017
	Assets			Liabilities
Type of Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Commodity contracts	Derivative instruments	$	3,017	Derivative instruments	$	2,755

	As of December 30, 2016
	Assets			Liabilities
Type of Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Commodity contracts	Derivative instruments	$	978	Derivative instruments	$	4,115

Schedule of Recognized Gains (Losses) for Derivatives

	As of September 30, 2017
	Assets			Liabilities
Type of Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Commodity contracts	Derivative instruments	$	3,017	Derivative instruments	$	2,755

	As of December 30, 2016
	Assets			Liabilities
Type of Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Commodity contracts	Derivative instruments	$	978	Derivative instruments	$	4,115

The classification and amounts of the Company’s recognized gains (losses) for its derivatives not designated as hedging instruments are as follows (in thousands):

		Realized Gains (Losses)
		Three Months Ended September 30,
Type of Instrument	Statements of Operations Location	2017			2016
Commodity contracts	Cost of goods sold	$	(1,576	)	$	2,242

		Unrealized Gains (Losses)
		Three Months Ended September 30,
Type of Instrument	Statements of Operations Location	2017		2016
Commodity contracts	Cost of goods sold	$	1,093	$	(1,383	)

		Realized Gains (Losses)
		Nine Months Ended September 30,
Type of Instrument	Statements of Operations Location	2017			2016
Commodity contracts	Cost of goods sold	$	(4,495	)	$	2,152

		Unrealized Gains (Losses)
		Nine Months Ended September 30,
Type of Instrument	Statements of Operations Location	2017		2016
Commodity contracts	Cost of goods sold	$	3,659	$	(483	)