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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
12 Months Ended
Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]  
Noncash investing and financing activities
Noncash investing and financing activities and other supplemental cash flow information follows (in thousands):
 
2014
 
2013
 
2012
Accrued but unpaid additions to property and equipment at December 31
$
48,646

 
$
49,220

 
$
41,754

Cash interest payments in excess of interest capitalized
78,744

 
65,824

 
44,579

Net cash income tax payments (refunds)
8,549

 
(5,929
)
 
13,150