XML 59 R43.htm IDEA: XBRL DOCUMENT v3.10.0.1
SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2018
Supplemental Cash Flow Information
Supplemental cash flow information was as follows:
 
Years Ended December 31,
 
2018
 
 
2017
 
 
2016
 
Interest paid
 
$
3,065
 
 
$
5,773
 
 
$
3,362
 
Income taxes net of refunds
 
$
115,301
 
 
$
48,056
 
 
$
99,006
 
Common stock issued for Alert Labs Inc.
 
$
6,846
 
 
 
—
 
 
 
—