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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information
The following table summarizes supplemental cash flow information (in thousands):
Fiscal Year
2016
 
2015
 
2014
Cash paid during the year for:
 

 
 

 
 

Interest
$
26,867

 
$
20,042

 
$
15,924

Income taxes, net of refunds
$
14,163

 
$
131,838

 
$
167,702

Supplemental disclosures of non-cash investing and financing activities:
 

 
 

 
 

Additions to property, plant and equipment included in accounts payable
$
4,762

 
$
7,966

 
$
5,030

Additions to property, plant and equipment acquired under capital leases
$
432

 
$
1,462

 
$
1,180