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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2012
Fair Value Disclosures [Abstract]  
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value as of June 30, 2012 were as follows:
 
 
 
 
(In thousands)
 
 
Fair value as of measurement date
 
Quoted prices in active markets for identical assets
(Level 1)
 
Significant other observable inputs
(Level 2)
 
Significant unobservable inputs
(Level 3)
Government securities
 
$
16,469

 
$

 
$
16,469

 
$

Corporate bonds
 
$
4,052

 
$

 
$
4,052

 
$

Derivative financial instruments
 
$
(696
)
 
$

 
$
(696
)
 
$



Assets measured at fair value as of December 31, 2011 were as follows:
 
 
 
 
(In thousands)
 
 
Fair value as of measurement date
 
Quoted prices in active markets for identical assets
(Level 1)
 
Significant other observable inputs
(Level 2)
 
Significant unobservable inputs
(Level 3)
Government securities
 
$
15,863

 
$

 
$
15,863

 
$

Corporate bonds
 
$
3,751

 
$

 
$
3,751

 
$

Derivative financial instruments
 
$
(91
)
 
$

 
$
(91
)
 
$