XML 51 R32.htm IDEA: XBRL DOCUMENT v3.6.0.2
Investments (Tables)
 12 Months Ended
Dec. 31, 2016
Investments [Abstract]  
Unrealized Gain (Loss) on Investments [Table Text Block]
The following table summarizes unrealized gains and losses related to these investments as of December 31, 2016 and December 31, 2015:
Dollar amounts in millions
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Fair Value
December 31, 2016
$
0.4

 
$
4.4

 
$
—

 
$
4.8

 
 
 
 
 
 
 
 
December 31, 2015
$
0.4

 
$
5.4

 
$
—

 
$
5.8
Investments Classified by Contractual Maturity Date [Table Text Block]
debt securities classified as available for sale at December 31, 2016 exceed one year.