FAIR VALUE MEASUREMENTS (Schedule of Assets and Liabilities Measured on a Recurring Basis) (Details) $ in Thousands	Dec. 27, 2015 USD ($)
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate	5.75%
Fair Value, Measurements, Recurring [Member] | Commodity Futures Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 59
Derivative liabilities	(5,436)
Fair Value, Measurements, Recurring [Member] | Commodity Futures Instruments [Member] | Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed-rate senior notes payable at 5.75%	(488,750)
Fair Value, Measurements, Recurring [Member] | Commodity Options Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,618
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commodity Futures Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	59
Derivative liabilities	(5,436)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commodity Futures Instruments [Member] | Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed-rate senior notes payable at 5.75%	(488,750)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commodity Options Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,618
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commodity Futures Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Derivative liabilities	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commodity Futures Instruments [Member] | Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed-rate senior notes payable at 5.75%	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commodity Options Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commodity Futures Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Derivative liabilities	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commodity Futures Instruments [Member] | Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed-rate senior notes payable at 5.75%	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commodity Options Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 0