Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2015

Asset Retirement and Reclamation Liabilities

Summary of activity in the Velardena Properties ARO

	Three Months Ended
	March 31,
	2015			2014
	(in thousands)
Beginning balance	$	2,582		$	2,467
Changes in estimates, and other	(300		)	(85		)
Accretion expense	52			49
Ending balance	$	2,334		$	2,431