XML 48 R43.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value Disclosures [Abstract]  
Assets Carried at Fair Value on a Recurring Basis
As of December 31, 2012 and 2011, our assets carried at fair value on a recurring basis were as follows:
 
Level 1
 
Level 2
 
Level 3
 
Total Fair Value
December 31, 2012
(In thousands)
Corporate bonds
$

 
$
37,357

 
$

 
$
37,357

Commercial paper

 
55,748

 

 
55,748

Negotiable certificate of deposit

 
4,414

 

 
4,414

U.S. treasury notes

 
22,267

 

 
22,267

Agency securities

 
25,867

 

 
25,867

Municipal bonds

 
11,568

 

 
11,568

Asset-backed securities

 
26,566

 

 
26,566

Total
$

 
$
183,787

 
$

 
$
183,787

 
 
 
 
 
 
 
 
December 31, 2011
 
 
 
 
 
 
 
Corporate bonds
$

 
$
16,333

 
$

 
$
16,333

Commercial paper

 
4,999

 

 
4,999

Negotiable certificate of deposit

 
3,500

 

 
3,500

Agency securities

 
3,987

 

 
3,987

Municipal bonds

 
2,391

 

 
2,391

Total
$

 
$
31,210

 
$

 
$
31,210