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Fair value (Tables)
9 Months Ended
Sep. 29, 2012
Fair Value Disclosures [Abstract]  
Fair value and carrying value of debt instruments
The fair values and carrying values of our debt instruments are detailed as follows:
 
September 29, 2012
 
December 31, 2011
 
Fair Value
 
Carrying
Value
 
Fair Value
 
Carrying
Value
7.20% senior notes, payable April 15, 2012; interest payable semiannually
$

 

 
336,606

 
336,270

6.125% notes, payable January 15, 2016; interest payable semiannually
1,006,200

 
900,000

 
963,900

 
900,000

Five-year senior secured credit facility, due July 8, 2016
572,850

 
572,850

 
298,000

 
298,000

Industrial revenue bonds, capital leases and other
52,092

 
52,092

 
52,169

 
52,169

Total long-term debt
1,631,142

 
1,524,942

 
1,650,675

 
1,586,439

Less current portion
57,673

 
57,673

 
386,591

 
386,255

Long-term debt, less current portion
$
1,573,469

 
1,467,269

 
1,264,084

 
1,200,184