Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

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, 2013 was as follows (in thousands):

	As of June 30, 2013
	Level 1	Level 2	Level 3	Total
Assets
Interest rate derivatives	—	247	—	$	247
Commodity derivatives	—	66	—	66
Total assets	—	313	—	313