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Income Taxes (Schedule Of Provision For Income Tax Benefit (Expense) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Expense Benefit [Abstract]                      
Current - Federal                 $ (31) $ (503) $ 10,586
Current - foreign                 (46,188) (27,256) (48,466)
Current - state                 (12,890) 3,193 1,527
Total current benefit (expense)                 (59,109) (24,566) (36,353)
Deferred - Federal                 (30,719) (29,284) 126,905
Deferred - foreign                 5,269 4,308 8,932
Deferred - state                 (2,398) (8,947) 22,333
Total deferred benefit                 (27,848) (33,923) 158,170
Income tax benefit (expense) $ (5,434) $ (2,841) $ (22,077) $ (56,605) $ 33,654 $ (24,376) $ 621 $ (68,388) $ (86,957) $ (58,489) $ 121,817