Reclamation (Tables)

9 Months Ended

Sep. 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 September 30,				Nine Months Ended September 30,
In thousands	2021		2020		2021		2020
Asset retirement obligation - Beginning	$	141,205	$	138,904	$	137,120	$	134,543
Accretion	2,984		2,924		8,769		8,591
Settlements	(1,406)		(930)		(3,106)		(2,236)
Asset retirement obligation - Ending	$	142,783	$	140,898	$	142,783	$	140,898