XML 38 R25.htm IDEA: XBRL DOCUMENT v3.19.1
SHORT-TERM INVESTMENTS: (Tables)
 3 Months Ended
Mar. 31, 2019
SHORT-TERM INVESTMENTS:  
Schedule of short-term investments

 

Short-term investments were as follows ($ in millions):

 

 

 

 

 

 

 

 

 

 

    

At March 31, 

    

At December 31, 

 

 

 

2019

 

2018

 

Trading securities

 

$

212.7

 

$

213.1

 

Weighted average interest rate

 

 

2.5

%

 

2.2

%

 

 

 

 

 

 

 

 

Available-for-sale

 

$

0.8

 

$

0.7

 

Weighted average interest rate

 

 

0.7

%

 

0.7

%

Total

 

$

213.5

 

$

213.8

 

 

Summary of activity investments

The following table summarizes the activity of these investments by category (in millions):

 

 

 

 

 

 

 

 

 

 

Three months ended 

 

 

March 31, 

 

    

2019

    

2018

Trading:

 

 

 

 

 

 

Interest earned

 

$

0.1

 

$

0.1

Unrealized (loss) gain at the end of the period

 

$

(0.1)

 

$

(0.1)

 

 

 

 

 

 

 

Available-for-sale:

 

 

 

 

 

 

Interest earned

 

 

(*)

 

 

(*)

Investment redeemed

 

$

 —

 

$

0.1

(*) Less than $0.1 million.