Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Summary of Significant Accounting Policies [Abstract]

Summary of reconciliation of the ARO

	Six Months Ended June 30,
(in thousands)	2013		2012
Balance at beginning of period	$	2,321	$	2,149
Accretion expense		68		52
Additions during period		151		10
Balance at end of period	$	2,540	$	2,211