Purchase Consideration Paid and Assets Acquired and Liabilities Assumed (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Feb. 28, 2014	Feb. 28, 2014 Cash consideration paid upon First Closing	May 31, 2014 Subsequent Event Cash consideration to be paid upon Second Closing
Business Acquisition [Line Items]
Cash consideration		$ 85,000	$ 85,000
CAMAC common stock
Long-term convertible subordinated note payable - related party	50,000
Total purchase price	220,000
Property, plant and equipment, net	249,739
Accounts payable	(25,429)
Asset retirement obligations	(20,890)
Net assets acquired	203,420
Consideration in excess of carrying value acquired	$ 16,580