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Fair Value Measurements
12 Months Ended
Dec. 31, 2012
Fair Value Measurements [Abstract]  
Fair Value Measurements
3. Fair Value Measurements
The Company has various financial instruments that must be measured at fair value on a recurring basis, including marketable debt and equity securities held by Astec Insurance Company ("Astec Insurance"), the Company's captive insurance company, and marketable equity securities held in an unqualified Supplemental Executive Retirement Plan ("SERP"). The financial assets held in the SERP also constitute a liability of the Company for financial reporting purposes. The Company's subsidiaries also occasionally enter into foreign currency exchange contracts to mitigate exposure to fluctuations in currency exchange rates.

For cash and cash equivalents, trade receivables, other receivables, revolving debt and accounts payable, the carrying amount approximates the fair value because of the short-term nature of these instruments. Investments are carried at their fair value based on quoted market prices for identical or similar assets or, where no quoted prices exist, other observable inputs for the asset. The fair values of foreign currency exchange contracts are based on quotations from various banks for similar instruments using models with market based inputs.

As indicated in the tables below, the Company has determined that its financial assets and liabilities at December 31, 2012 and 2011 are level 1 and level 2 in the fair value hierarchy (in thousands):
 
  
December 31, 2012
 
   
Level 1
  
Level 2
  
Level 3
  
Total
 
Financial Assets:
            
Trading equity securities:
            
SERP money market fund
 $996  $--  $--  $996 
SERP mutual funds
  1,835   --   --   1,835 
Preferred stocks
  720   --   --   720 
Trading debt securities:
                
Corporate bonds
  3,342   909   --   4,251 
Municipal bonds
  1,449   957   --   2,406 
Floating rate notes
  749   --   --   749 
U.S. Treasury bill
  200   --   --   200 
Other government bonds
  --   409   --   409 
Total financial assets
 $9,291  $2,275  $--  $11,566 
Financial Liabilities:
                
SERP liabilities
 $--  $6,674  $--  $6,674 
Derivative financial instruments
  --   145   --   145 
Total financial liabilities
 $--  $6,819  $--  $6,819 

 
   
December 31, 2011
 
   
Level 1
  
Level 2
  
Level 3
  
Total
 
Financial Assets:
            
Trading equity securities:
            
SERP money market fund
 $989  $--  $--  $989 
SERP mutual funds
  1,732   --   --   1,732 
Preferred stocks
  441   --   --   441 
Trading debt securities:
                
Corporate bonds
  1,649   2,238   --   3,887 
Municipal bonds
  211   2,880   --   3,091 
Floating rate notes
  97   233   --   330 
U.S. Treasury bill
  250   --   --   250 
Other government bonds
  --   343   --   343 
Derivative financial instruments
  --   307   --   307 
Total financial assets
 $5,369  $6,001  $--  $11,370 
Financial Liabilities:
                
SERP liabilities
 $--  $6,076  $--  $6,076 
Derivative financial instruments
  --   50   --   50 
Total financial liabilities
 $--  $6,126  $--  $6,126