Commitments, Contingencies and Legal Proceedings (Tables)

6 Months Ended

Jun. 30, 2021

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:

	Six months ended June 30
In thousands		2021			2020
Balance at January 1,	$	18,455		$	21,870
Payments		(886	)		(2,234	)
Accretion		101		104
Balance at June 30,	$	17,670		$	19,740