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Interest Expense
 9 Months Ended
Sep. 30, 2014
Interest and Debt Expense [Abstract]  
Interest Expense
Interest Expense
The following table presents an analysis of interest expense: 
 
For the Three Months Ended
 
For the Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2014
 
2013
 
2014
 
(Dollars in thousands)
 
(Dollars in thousands)
 
 
 
 
 
 
 
 
Interest incurred on debt
$
5,372

 
$
5,448

 
$
16,255

 
$
16,115

Amortization of discount on Senior Subordinated Notes
2,897

 
3,100

 
8,546

 
9,145

Amortization of debt issuance costs
729

 
521

 
1,872

 
1,916

Supply Chain Financing mark-up
100

 
—

 
380

 
47

Total interest expense
$
9,098

 
$
9,069

 
$
27,053

 
$
27,223


Interest Rates
The Revolving Facility had an effective interest rate of 2.42% and 2.16% as of December 31, 2013 and September 30, 2014, respectively. The Senior Subordinated Notes have an implied interest rate of 7.00%. The Senior Notes have a fixed interest rate of 6.375%.