CHAPTER 11 BANKRUPTCY FILING - Liabilities subject to compromise (Details) $ in Thousands	Jun. 28, 2020 USD ($)
Liabilities subject to compromise
Accounts payable	$ 22,950
Accrued compensation	23
Other accrued liabilities	1,511
Other long-term liabilities	3,336
Accounts payable, accrued, and other liabilities	27,820
Debt subject to compromise	440,418
Accrued interest on debt subject to compromise	18,112
Long-term debt and accrued interest	458,530
Pension and postretirement obligations	639,656
Liabilities subject to compromise	$ 1,126,006