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Debt (Tables)
 12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Long term debt and capital lease obligations
 
December 31, 2018
 
December 31, 2017
In thousands
Current
 
Non-Current
 
Current
 
Non-Current
2024 Senior Notes, net(1)
$
—

 
$
245,854

 
$
—

 
$
245,088

Revolving Credit Facility(2)
—

 
135,000

 
—

 
100,000

Capital lease obligations
24,937

 
53,035

 
16,559

 
35,481

Silvertip debt obligation
—

 
—

 
14,194

 
—

 
$
24,937

 
$
433,889

 
$
30,753

 
$
380,569


(1) Net of unamortized debt issuance costs of $4.1 million and $4.9 million at December 31, 2018 and December 31, 2017, respectively.
(2) Unamortized debt issuance costs of $2.2 million and $1.9 million at December 31, 2018 and December 31, 2017, respectively, included in Other Non-Current Assets.
Schedule of Future Minimum Lease Payments for Operating and Capital Leases [Table Text Block] [Table Text Block]
Minimum future lease payments under capital and operating leases with terms longer than one year are as follows:
At December 31, (In thousands)
 
 
 
Operating leases
Capital leases
2019
$
15,941

$
28,432

2020
15,394

23,459

2021
14,775

22,129

2022
14,722

12,987

2023
14,242

6,633

Thereafter
27,686

1,023

Total
$
102,760

$
94,663

Less: imputed interest
—

(16,691
)
Net lease obligation
$
102,760

$
77,972
Interest expenses incurred for various debt instruments
Interest Expense
 
Year ended December 31,
In thousands
2018
 
2017
 
2016
2024 Senior Notes
$
14,688

 
$
8,608

 
$
—

2021 Senior Notes
—

 
6,221

 
28,871

Revolving Credit Facility
5,854

 
885

 
—

3.25% Convertible Senior Notes due 2028
—

 
—

 
13

Term Loan due 2020
—

 
—

 
4,939

Capital lease obligations
2,270

 
1,621

 
1,422

Accretion of Palmarejo gold production royalty obligation
—

 
—

 
1,211

Amortization of debt issuance costs
1,302

 
809

 
1,933

Accretion of debt premium
—

 
(71
)
 
(345
)
Accretion of Silvertip contingent consideration
1,311

 
260

 
—

Other debt obligations
176


42

 
58

Capitalized interest
(1,237
)
 
(1,935
)
 
(1,206
)
Total interest expense, net of capitalized interest
$
24,364

 
$
16,440

 
$
36,896