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Income Taxes (Schedule Of U.S. And Non-U.S. Components Of Income (Loss) Before Provision (Benefit) For Income Taxes) (Details) - USD ($)
$ in Thousands
5 Months Ended 7 Months Ended 12 Months Ended
Dec. 31, 2015
Aug. 14, 2015
Dec. 31, 2016
Dec. 31, 2014
Predecessor [Member]        
Tax Credit Carryforward [Line Items]        
U.S. $ (16,827) $ (84,599)   $ (127,707)
Non-U.S. (4,916) (10,919)   (30,603)
Loss from continuing operations before provision for income taxes (21,743) $ (95,518) $ 116,421 $ (158,310)
Successor [Member]        
Tax Credit Carryforward [Line Items]        
U.S.     (44,971)  
Non-U.S.     (71,450)  
Loss from continuing operations before provision for income taxes $ (21,743)   $ (116,421)