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Debt (Tables)
 12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]  
Summary of Debt
Debt consisted of the following at December 31 (in thousands):
 
2016
 
2015
7.875% senior secured notes due April 15, 2019
$
233,154

 
$
232,363
Margin for Borrowings under Revolving Credit Facility
The applicable margin is based on average daily availability under the revolving credit facility as follows:
Level
 
Average Daily
Availability
 
Domestic Base
Rate  Loans
 
LIBOR
Revolver Loans
III
 
≥ to $20,000,000
 
0.50
%
 
1.50
%
II
 
> $10,000,000 but < $20,000,000
 
0.75
%
 
1.75
%
I
 
≤ to $10,000,000
 
1.00
%
 
2.00
%