Annual report pursuant to Section 13 and 15(d)

Supplemental Cash Flow Information and Disclosures of Non-Cash Transactions (Details)

v2.4.0.6
Supplemental Cash Flow Information and Disclosures of Non-Cash Transactions (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]      
Cash paid during the year for interest, net of amounts capitalized $ 200,323 $ 190,849 $ 263,520
Construction-in-process funded with accrued liabilities $ 99,751 $ 0 $ 0