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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Information  
Schedule of supplemental cash flow information

Supplemental cash flow information for the years ended December 31, 2015, 2016 and 2017 is as follows (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

    

2015

    

2016

    

2017

 

Income taxes paid, net of refunds

 

$

63,899

 

$

54,442

 

$

59,474

 

Interest paid

 

$

6,181

 

$

9,378

 

$

15,415

 

Assets acquired through capital leases

 

$

4,212

 

$

4,491

 

$

2,418