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Interest Expense (Tables)
 12 Months Ended
Dec. 31, 2018
Interest and Debt Expense [Abstract]  
Schedule Of Interest Expense
The following table presents an analysis of interest expense:
 
For the Year Ended December 31
 
2018
 
2017
 
2016
 
(Dollars in thousands)
Interest incurred on debt
$
100,844

 
$
24,060

 
$
20,408

Related Party Promissory Note interest expense
5,090

 
—

 
—

Senior Note redemption premium
4,782

 
—

 
—

Accretion of fair value adjustment on Senior Notes
19,414

 
6,454

 
6,305

Accretion of original issue discount on 2018 Term Loans
1,455

 
—

 
—

Amortization of debt issuance costs
3,476

 
309

 
201

Total interest expense
$
135,061

 
$
30,823

 
$
26,914