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Long-Term Debt Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2019
Debt Disclosure [Abstract]  
Long-term debt
Long-term debt consists of the following (in thousands):
 
June 30,
 
December 31,
 
2019
 
2018
Unsecured notes
$
425,000

 
$
425,000

Credit Agreement
246,735

 

Unamortized discounts and issuance costs of unsecured notes
(4,384
)
 
(3,052
)
 
$
667,351

 
$
421,948

Current portion, long-term debt
$
12,493

 
$

Long-term debt
$
654,858

 
$
421,948