Annual report pursuant to Section 13 and 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
Dec. 31, 2013
Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]    
Current assets $ 84,107 $ 68,459
Noncurrent assets 1,107,579 887,884
Current liabilities 112,406 74,308
Noncurrent liabilities $ 110,095 $ 23,521