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Long-Term Debt Schedule of Long-term Debt (Tables)
 3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The following table details the Company’s long-term debt at the respective principal amounts, net of unamortized debt issuance costs (in thousands):

 
March 31,
 
December 31,
 
2018
 
2017
 
2017
Senior unsecured notes:
 
 
 
 
 
5.375% senior notes due 2024 (1)
$
295,400

 
$
—

 
$
295,243

6.75% senior notes due 2021 (2)
—

 
196,721

 
—

 
$
295,400

 
$
196,721

 
$
295,243

 
 
 
 
 
 
Revolving unsecured credit facility, maturing 2022
$
83,000

 
$
137,000

 
$
107,000


(1)
As of March 31, 2018 and December 31, 2017, deferred debt issuance costs of $4.6 million and $4.8 million, respectively, are included as a direct deduction from the carrying amount of the senior unsecured notes due 2024 in the accompanying condensed consolidated balance sheets.

(2) 
As of March 31, 2017, deferred debt issuance costs of $3.3 million are included as a direct deduction from the carrying amount of the senior unsecured notes due 2021 in the accompanying condensed consolidated balance sheets.