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SHAREHOLDERS' EQUITY (Tables)
 12 Months Ended
Dec. 31, 2012
Stockholders' Equity Note [Abstract]  
Schedule of changes in outstanding warrants
A summary of changes in outstanding warrants is as follows:
 
December 31, 2012
 
Number of IAC
Common Shares
Underlying Warrants
 
Weighted
Average
Strike Price
 
(Shares in thousands)
Outstanding at January 1, 2012
14,348

 
$
28.40

Exercised
(14,348
)
 
28.40

Outstanding at December 31, 2012
—

 
$
—