Income Taxes - Net Operating Losses and Tax Credits (Details) $ in Thousands	Feb. 27, 2016 USD ($)
Net Operating Losses and Tax Credits
Alternative minimum tax credit carryforwards	$ 3,234
Federal
Net Operating Losses and Tax Credits
Net operating loss carryforwards	2,865,598
Amount of deductions under net operating loss carryforwards	18,365
Federal business tax credit carryforwards	50,165
Federal | Net Operating Losses expiration period 2020 and 2028
Net Operating Losses and Tax Credits
Net operating losses expiration amount	1,673,912
Federal | Net Operating Losses expiration period 2029 and 2036
Net Operating Losses and Tax Credits
Net operating losses expiration amount	1,173,321
State
Net Operating Losses and Tax Credits
Net operating loss carryforwards	4,538,030
Amount of deductions under net operating loss carryforwards	$ 79,442