FAIR VALUE MEASUREMENTS (Schedule of Fair Value and Carrying Amount of Debt Obligations) (Details) - USD ($) $ in Thousands	Sep. 24, 2017	Dec. 25, 2016	Mar. 11, 2015	May 29, 2014
Senior notes | Fixed-rate senior notes payable at 5.75%, at Level 1 inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	5.75%		5.75%
Senior notes | Fixed-rate senior notes payable at 6.25%, at Level 1 inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	6.25%			6.25%
Senior notes | Level 1 | Carrying Amount | Fixed-rate senior notes payable at 5.75%, at Level 1 inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-rate senior notes payable	$ (500,000)	$ (500,000)
Senior notes | Level 1 | Carrying Amount | Fixed-rate senior notes payable at 6.25%, at Level 1 inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-rate senior notes payable	(401,983)	(369,736)
Senior notes | Level 1 | Fair Value | Fixed-rate senior notes payable at 5.75%, at Level 1 inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-rate senior notes payable	(521,250)	(503,395)
Senior notes | Level 1 | Fair Value | Fixed-rate senior notes payable at 6.25%, at Level 1 inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-rate senior notes payable	(415,622)	(389,709)
Mortgages | Level 3 | Carrying Amount | Chattels mortgages with payables at weighted average of 3.74%
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-rate senior notes payable	(1,015)	(1,432)
Mortgages | Level 3 | Fair Value | Chattels mortgages with payables at weighted average of 3.74%
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-rate senior notes payable	$ (989)	$ (1,379)