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Long-Term Debt Long-Term Debt (Tables)
12 Months Ended
Dec. 31, 2019
Debt Disclosure [Abstract]  
Long-term debt
Long-term debt consists of the following (in thousands):
 
December 31,
 
2019
 
2018
Unsecured notes
$
425,000

 
$
425,000

Credit Agreement
239,552

 

Unamortized discounts and issuance costs
(3,689
)
 
(3,052
)
 
$
660,863

 
$
421,948

 
 
 
 
Current portion, long-term debt
12,444

 

Long-term debt
$
648,419

 
$
421,948