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Supplemental cash flow information
 12 Months Ended
Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]  
Supplemental cash flow information
Supplemental cash flow information
 
Year Ended December 31,
 
2016
 
2015
 
2014
Cash paid for:
 
 
 

 
 
Interest
$
19,511

 
$
18,781

 
$
19,066

Income/withholding taxes (1)
13,904

 
24,125

 
12,189

Non-cash investing activities:
 

 
 
 
 

Accrued capital costs
$
3,018

 
$
777

 
$
744


(1)
We paid withholding taxes in Iceland on intercompany dividends of zero, $8,388 and $5,491 during the years ended December 31, 2016, 2015 and 2014, respectively. Such withholding taxes are then refunded to us in the following year.