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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
9 Months Ended
Sep. 30, 2012
Carrying Values and Fair Values of Company's Debt Instruments

The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of September 30, 2012 and December 31, 2011, are as follows:

 

     Carrying Value at      Fair Value* at  
     September 30,
2012
     December 31,
2011
     September 30,
2012
     December 31,
2011
 

6.22% Senior Notes due 2015

   $ 175,000       $ 175,000       $ 195,749       $ 186,305   

3.30% Senior Notes due 2016

   $ 100,000       $ 100,000       $ 103,370       $ 98,980   

4.00% Senior Notes due 2018

   $ 50,000       $ 50,000       $ 52,694       $ 51,220   

5.25% Senior Notes due 2019

   $ 175,000       $ 175,000       $ 196,766       $ 174,125   

4.64% Senior Notes due 2021

   $ 100,000       $ 100,000       $ 107,895       $ 104,250   

 

* Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value is based on quotes of bonds with similar ratings in similar industries.