Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2016

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The fair value hierarchy for our financial assets accounted for at fair value on a recurring basis at June 30, 2016 and December 31, 2015 was as follows (in thousands):



	As of June 30, 2016
	Level 1		Level 2			Level 3		Total
Assets
Interest rate derivatives	$	—	$	—		$	—	$	—
OTC commodity swaps	—		50			—		50
Total assets	—		50			—		50
Liabilities
OTC commodity swaps	—		(71		)	—		(71		)
Net liabilities	$	—	$	(21	)	$	—	$	(21	)



	As of December 31, 2015
	Level 1		Level 2			Level 3		Total
Assets
Interest rate derivatives	$	—	$	—		$	—	$	—
OTC commodity swaps	—		171			—		171
Total assets	—		171			—		171
Liabilities
OTC commodity swaps	—		(45		)	—		(45		)
Net assets	$	—	$	126		$	—	$	126