Reclamation (Tables)

6 Months Ended

Jun. 30, 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 June 30,				Six Months Ended June 30,
In thousands	2021		2020		2021		2020
Asset retirement obligation - Beginning	$	139,354	$	136,628	$	137,120	$	134,543
Accretion	2,922		2,863		5,785		5,667
Settlements	(1,071)		(587)		(1,700)		(1,306)
Asset retirement obligation - Ending	$	141,205	$	138,904	$	141,205	$	138,904