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FAIR VALUE MEASUREMENTS (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value Disclosures [Abstract] 
Fair value of assets measured on a recurring basis
The Company’s assets measured at fair value on a recurring basis at September 30, 2011 and December 31, 2010 were as follows (in thousands):

 
 
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
 
Significant Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Balance at
September 30,
2011
Auction rate securities
 
$

 
$

 
$
4,239

 
$
4,239

Marketable securities
 
$
93

 
$

 
$

 
$
93


 
 
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
 
Significant Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
Balance at
December 31,
2010
Auction rate securities
 
$

 
$

 
$
5,437

 
$
5,437

Marketable securities
 
$
3,174

 
$

 
$

 
$
3,174

Changes in auction rate securities measured at fair value on a recurring basis
The following tables present the changes in the Company’s auction rate securities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three and nine months ended September 30, 2011 and 2010 (in thousands):

 
 
Three Months Ended
 
 
September 30,
 
 
2011
 
2010
Balance at July 1,
 
$
5,311

 
$
5,315

Sale of auction rate securities
 
(1,000
)
 

Unrealized (losses) gains included in other comprehensive income
 
(72
)
 
115

Balance at September 30,
 
$
4,239

 
$
5,430


 
 
Nine Months Ended
 
 
September 30,
 
 
2011
 
2010
Balance at January 1,
 
$
5,437

 
$
6,503

Sale of auction rate securities
 
(1,000
)
 
(1,300
)
Unrealized (losses) gains included in other comprehensive income
 
(198
)
 
227

Balance at September 30,
 
$
4,239

 
$
5,430