Commitments, Contingencies and Legal Proceedings (Tables)

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Schedule of Reserves

Our reserve for past and future government oversight costs and long-term monitoring and maintenance is set forth below:

	Three months ended March 31
In thousands		2020			2019
Balance at January 1,	$	21,870		$	45,001
Payments		(131	)		(20,535	)
Reserve adjustment		—			(2,509	)
Accretion		52		56
Balance at March 31,	$	21,791		$	22,013