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CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)
 3 Months Ended
Mar. 31, 2014
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents and Investments [Table Text Block]
These securities are carried at fair market value, with unrealized gains and losses reported in shareholders’ equity. Gains or losses on securities sold are based on the specific identification method. Investments as of March 31, 2014 and December 31, 2013 consist of the following (in thousands):
 
 
Amortized
 
Unrealized
 
Aggregate Fair
Investment Classification
 
Cost
 
Gains
 
(Losses)
 
Market Value
March 31, 2014
 
 
 
 
 
 
 
 
Certificates of deposit
 
$
10,881

 
$
4

 
$
(10
)
 
$
10,875

Corporate bonds
 
218,771

 
37

 
(17
)
 
218,791

U.S. Government bonds
 
4,075

 
—

 
—

 
4,075

Convertible notes
 
300

 
—

 
—

 
300

 
 
$
234,027

 
$
41

 
$
(27
)
 
$
234,041

December 31, 2013
 
 
 
 
 
 
 
 
Certificates of deposit
 
$
11,358

 
$
2

 
$
(16
)
 
$
11,344

Corporate bonds
 
190,738

 
33

 
(48
)
 
190,723

U.S. Government bonds
 
3,074

 
—

 
—

 
3,074

Convertible notes
 
4,300

 
—

 
—

 
4,300

 
 
$
209,470

 
$
35

 
$
(64
)
 
$
209,441