Commitment and Contingencies (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2016 USD ($)	Jul. 21, 2016 gal	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Contingency loss recognized liability	$ 4,100		$ 3,500
Water Control Board and Fish and Wildlife Complaint [Member]
Loss Contingencies [Line Items]
Alleged number of gallons discharged | gal		8,207,560
Water Control Board and Fish and Wildlife Complaint [Member] | Water Control Board [Member]
Loss Contingencies [Line Items]
Payment for legal settlements	500
Water Control Board and Fish and Wildlife Complaint [Member] | Fish and Wildlife [Member]
Loss Contingencies [Line Items]
Payment for legal settlements	$ 20