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SUPPLEMENTAL CASH FLOW INFORMATION
 6 Months Ended
Jun. 30, 2018
Supplemental Cash Flow Elements [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION
SUPPLEMENTAL CASH FLOW INFORMATION
 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
(in thousands)
 
2018
 
2017
 
2018
 
2017
Cash paid during the period for:
 
 

 
 

 
 

 
 

Interest expense (net of capitalized amounts of $9,233, $11,659, $9,389, and $11,962, respectively)
 
$
22,954

 
$
28,115

 
$
23,343

 
$
28,772

Income taxes
 
$
—

 
$
1

 
$
—

 
$
3

Cash received for income tax refunds
 
$
717

 
$
—

 
$
718

 
$
21