Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Long term debt and capital lease obligations

	December 31, 2020				December 31, 2019
In thousands	Current		Non-Current		Current		Non-Current
2024 Senior Notes, net(1)	$	—	$	227,590	$	—	$	226,885
Revolving Credit Facility(2)	—		—		—		—
Finance lease obligations	22,074		25,837		22,746		45,866
	$	22,074	$	253,427	$	22,746	$	272,751

(1) Net of unamortized debt issuance costs of $2.4 million and $3.1 million at December 31, 2020 and December 31, 2019, respectively.

(2) Unamortized debt issuance costs of $1.5 million and $2.3 million at December 31, 2020 and December 31, 2019, respectively, included in Other Non-Current Assets.

Interest expenses incurred for various debt instruments

Interest Expense

	Year Ended December 31,
In thousands	2020		2019		2018
2024 Senior Notes	$	13,513	$	14,586	$	14,688
Revolving Credit Facility	3,165		5,358		5,854
Finance lease obligations	3,634		4,150		2,270
Amortization of debt issuance costs	1,525		1,491		1,302
Accretion of Silvertip contingent consideration	—		396		1,311
Other debt obligations	344		580		176
Capitalized interest	(1,473)		(1,790)		(1,237)
Total interest expense, net of capitalized interest	$	20,708	$	24,771	$	24,364