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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]  
Schedule of Inventory, Current [Table Text Block]
A summary of inventories is as follows (in thousands):
 
 
 
June 30,
2013
 
December 31,
2012
 
Raw materials
 
$
6,444
 
$
8,198
 
Work in process
 
 
3,213
 
 
2,831
 
Finished goods
 
 
2,085
 
 
2,414
 
 
 
$
11,742
 
$
13,443
 
Schedule Of Property Plant And Equipment Estimated Useful Lives [Table Text Block]
Depreciation is computed by the straight line method over the following estimated useful lives:
 
 
Years
 
Land improvements
 
20 – 30
 
Buildings and improvements
 
7 – 40
 
Machinery and equipment:
 
 
 
Railroad equipment
 
20 – 39
 
Facility equipment
 
20 – 39
 
Other
 
5 – 7
 
Office furniture and equipment
 
3 – 10
 
Schedule Of Estimated Future Debt Issuance Cost Amortization [Table Text Block]
These costs are being amortized, using an effective interest method, through interest expense over the term of the related debt. Estimated future debt issuance cost amortization as of June 30, 2013 is as follows (in thousands):
 
Remainder of 2013
 
$
483
 
2014
 
 
704
 
2015
 
 
8
 
2016
 
 
8
 
2017
 
 
8
 
Thereafter
 
 
33
 
Total
 
$
1,244