Consolidated Statements of Cash Flows Consolidated Statements of Cash Flows (Parenthetical) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Capital lease asset transfer	$ 4,833	[1]
Other Current Assets [Member]
Capital lease asset transfer	200
Other Noncurrent Assets [Member]
Capital lease asset transfer	$ 4,600

[1] For the six months ended June 30, 2014, represents transfers of $0.2 million and $4.6 million from other current assets and other long-term assets, respectively, associated with the capital lease components of a processing agreement. See Note 6.