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Investments in Available-for-Sale Securities
3 Months Ended
Mar. 31, 2013
Available-for-sale Securities [Abstract]  
Available-for-sale Securities [Text Block]
. Investments in Available-for-Sale Securities

The Company has invested in marketable debt securities, primarily highly liquid AA - rated corporate bonds and U.S. government and government agency securities. These investments are held in the custody of a major financial institution. These securities, along with the Company's investments in marketable equity securities, are classified as available-for-sale securities and, accordingly, the unrealized gains and losses are recorded through other comprehensive income.

The Company's investments in available-for-sale marketable securities are as follows:
 
March 31, 2013
 
 
 
 
 
 
 
 
 
Balance Sheet
 
 
 
Gross
 
Gross
 
 
 
Classification
 
 
 
Unrealized
 
Unrealized
 
Fair
 
Short-Term
 
Other
 
Cost Basis
 
Gains
 
Losses
 
Value
 
Investments
 
Assets
 
(In thousands)
Available-for-sale:
 
 
 
 
 
 
 
 
 
 
 
U.S. government and agency securities
$
135,457

 
$
1

 
$
(705
)
 
$
134,753

 
$
134,753

 
$

Corporate notes and bonds
114,905

 

 
(1,244
)
 
113,661

 
113,661

 

Equity securities
5,271

 
5,547

 
(2,774
)
 
8,044

 

 
8,044

Total Investments
$
255,633

 
$
5,548

 
$
(4,723
)
 
$
256,458

 
$
248,414

 
$
8,044

 
 
 
 
 
 
 
 
 
 
 
 

 
December 31, 2012
 
 
 
 
 
 
 
 
 
Balance Sheet
 
 
 
Gross
 
Gross
 
 
 
Classification
 
 
 
Unrealized
 
Unrealized
 
Fair
 
Short-Term
 
Other
 
Cost Basis
 
Gains
 
Losses
 
Value
 
Investments
 
Assets
 
(In thousands)
Available-for-sale:
 
 
 
 
 
 
 
 
 
 
 
U.S. government and agency securities
$
146,993

 
$
2

 
$
(412
)
 
$
146,583

 
$
146,583

 
$

Corporate notes and bonds
88,118

 

 
(396
)
 
87,722

 
87,722

 

Equity securities
5,271

 
2,704

 
(2,628
)
 
5,347

 

 
5,347

Total Investments
$
240,382

 
$
2,706

 
$
(3,436
)
 
$
239,652

 
$
234,305

 
$
5,347

 
 
 
 
 
 
 
 
 
 
 
 

The aggregate fair value of investments with unrealized losses that have been owned for less than a year was $245.4 million and $223.3 million at March 31, 2013 and December 31, 2012, respectively. The aggregate fair value of investments with unrealized losses that have been owned for over a year was $0.3 million and $0.4 million at March 31, 2013 and December 31, 2012, respectively.

The debt securities outstanding at March 31, 2013 have maturity dates ranging from the second quarter of 2013 through the third quarter of 2014. The Company classifies its investments as current based on the nature of the investments and their availability for use in current operations.