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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
9 Months Ended
Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]  
Summary of estimated fair values of financial instruments
 
 
As of September 30, 2013
 
As of December 31, 2012
 
 
Carrying
Value
 
Fair
Value
 
Carrying
Value
 
Fair
Value
Cash equivalents
 
$
135,314

 
$
135,314

 
$
306,604

 
$
306,604

Marketable securities(1)
 

 

 
11,577

 
11,577

Long-term debt (as described in note 11)(2)
 
(17,404,714
)
 
(18,281,947
)
 
(11,015,625
)
 
(11,691,338
)
____________________________________
(1)
Marketable securities are classified within Prepaid expenses and other current assets and Other long-term assets, net in the consolidated balance sheets.
(2)
Fair value measurement of long-term debt was estimated using the quoted market prices for the Company’s debt issuances.
Summary of marketable securities by major security type
 
 
As of September 30, 2013
 
As of December 31, 2012
 
 
Cost
Basis
 
Fair
Value
 
Gross Unrealized
 
Cost
Basis
 
Fair
Value
 
Gross Unrealized
 
 
Gains
 
Losses
 
Gains
 
Losses
Auction rate floating securities
 
$

 
$

 
$

 
$

 
$
7,166

 
$
7,167

 
$
1

 
$

Equity securities
 

 

 

 

 
4,031

 
4,410

 
379

 

 
 
$

 
$

 
$

 
$

 
$
11,197

 
$
11,577

 
$
380

 
$