Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Tables)

v3.7.0.1
FAIR VALUE MEASUREMENTS (Tables)
 6 Months Ended
Jun. 30, 2017
Fair Value Disclosures [Abstract]  
Available-for-sale Securities [Table Text Block] Available-for-sale investments included in cash equivalents at the end of each period were as follows (in thousands):
 
June 30, 2017
 
December 31, 2016
 
Adjusted Cost
 
Gross Unrealized Gains
(Losses)
 
Fair Value
 
Adjusted Cost
 
Gross Unrealized Losses
 
Fair Value
Municipal bonds and notes
$
11,895

 
$
2

 
$
11,897

 
$
43,490

 
$
—

 
$
43,490

Corporate debt securities
16,312

 
(9
)
 
16,303

 
1,673

 
(2
)
 
1,671

Financial institution instruments
45,025

 
—

 
45,025

 
28,307

 
—

 
28,307

Total available-for-sale investments
$
73,232

 
$
(7
)
 
$
73,225

 
$
73,470

 
$
(2
)
 
$
73,468