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Basis of Presentation and New Accounting Standards (Tables)
 12 Months Ended
Dec. 31, 2011
Basis of Presentation and New Accounting Standards [Abstract]  
Schedule of Cash Flow, Supplemental Disclosures
         

 

 

For the years ended December 31,

 

2011

 

2010

 

2009

 

(in thousands)

Cash paid during the year for interest, net of amounts capitalized          

$              19,159               

 

$              24,049               

 

$              16,453

Cash paid (received) during the year for income taxes     

                4,198               

 

                14,368

 

                (41,469)               

Increase in noncash property additions         

                30,389

 

                46,588

 

                28,951