Reclamation (Tables)

3 Months Ended

Mar. 31, 2021

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation

Changes to the Company’s asset retirement obligations for its operating sites are as follows:

	Three Months Ended March 31,
In thousands	2021		2020
Asset retirement obligation - Beginning	$	137,120	$	134,543
Accretion	2,863		2,804
Settlements	(629)		(719)
Asset retirement obligation - Ending	$	139,354	$	136,628