Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 Prize [Member]	Apr. 20, 2012 Prize [Member]
Quarterly administration fee equal to percentage of adjusted EBITDA due to QRM	3.50%
Estimated environmental liability		$ 1,900	$ 1,891