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Shareholders' Interes (Schedule of Earnings (Loss) Per Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Numerator: [Abstract]                      
Net income (loss) attributable to the Company $ (309,227) $ (101,855) $ 7,202 $ (203,003) $ (191,264) $ (50,561) $ (39,025) $ (143,629) $ (606,883) $ (424,479) $ (302,094)
Less: Participating securities dividends                 2,566 8,456 2,972
Net loss attributable to the Company per common share - basic and diluted                 $ (609,449) $ (432,935) $ (305,066)
Denominator: [Abstract]                      
Weighted average common shares outstanding - basic                 83,364 82,745 82,487
Weighted average common shares outstanding - diluted                 83,364 82,745 82,487
Net loss attributable to the Company per common share:                      
Basic $ (3.70) $ (1.22) $ 0.09 $ (2.47) $ (2.31) $ (0.61) $ (0.48) $ (1.83) $ (7.31) $ (5.23) $ (3.70)
Diluted $ (3.70) $ (1.22) $ 0.09 $ (2.47) $ (2.31) $ (0.61) $ (0.48) $ (1.83) $ (7.31) $ (5.23) $ (3.70)