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Income Taxes (Schedule of Deferred Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 29, 2017
Dec. 30, 2016
Deferred tax assets:    
Net operating loss carry-forwards $ 244,205 $ 471,327
Book over tax depreciation and amortization 39,472 70,617
Tax credit and charitable contribution carry-forwards 66,770 64,367
Deferred revenue 53,543 0
Amortization of deferred stock compensation – non-qualified 8,966 14,780
Accruals and reserves not currently deductible 4,914 8,117
Other assets 1,088 106
Total deferred tax assets 418,958 629,314
Valuation allowance (418,958) (629,062)
Net deferred tax assets   252
Deferred tax liabilities:    
Unrealized gains on derivatives and other liabilities 0 (252)
Total deferred tax liabilities 0 (252)
Net deferred taxes $ 0 $ 0