Quarterly report pursuant to Section 13 or 15(d)

Equity Investments (Equity Investments Balance Sheet Disclosure) (Details)

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Equity Investments (Equity Investments Balance Sheet Disclosure) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 222,766 $ 146,075
Noncurrent assets 3,136,770 2,567,225
Current liabilities 310,689 233,726
Noncurrent liabilities $ 741,267 $ 664,848