Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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LONG-TERM DEBT - Junior Lien Term Loan Agreement (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018	Jul. 16, 2018
LONG-TERM DEBT
Long-term debt	$ 745,118
Junior Lien Term Loan Credit Agreement
LONG-TERM DEBT
Maximum borrowing capacity			$ 157,100
7.795% tranche A junior term loan due in 2030
LONG-TERM DEBT
Interest rate (as a percent)	7.795%	7.795%	7.795%
Long-term debt	$ 157,083
7.150% unsecured debentures due in 2027
LONG-TERM DEBT
Interest rate (as a percent)	7.15%	7.15%
Long-term debt	$ 7,105
6.875% unsecured debentures due in 2029
LONG-TERM DEBT
Interest rate (as a percent)	6.875%	6.875%
Long-term debt	$ 7,807