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Supplemental Cash Flow Information (Tables)
 3 Months Ended
Mar. 31, 2016
Supplemental Cash Flow Information [Abstract]  
Net Cash Paid For Interest and Income Taxes
Net cash paid for interest and income taxes was as follows for the three-month periods ended March 31, 2016 and 2015 (in thousands):
 
Three Months Ended 
 March 31,
 
2016
 
2015
Interest (1)
$
52,189

 
$
56,124

Income Taxes, Net of Refunds Received
$
(48,412
)
 
$
12,787

 
(1)
Net of capitalized interest of $9 million and $12 million for the three months ended March 31, 2016 and 2015, respectively.