DEBT (Details)		3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)	Jun. 25, 2017 USD ($)	Jun. 26, 2016 USD ($)	Jun. 25, 2017 USD ($)	Jun. 26, 2016 USD ($)	Dec. 31, 2016 USD ($)	Mar. 17, 2017 USD ($)	Jul. 26, 2016 USD ($)	Aug. 31, 2015 USD ($)	Apr. 28, 2015 USD ($)
Line of Credit Facility [Line Items]
Total long-term debt		$ 260,710,000		$ 260,710,000		$ 273,153,000
Less: current maturities of long-term debt		(15,766,000)		(15,766,000)		(15,766,000)
Less: Net deferred financing costs related to Term Loan		(535,000)		(535,000)		(576,000)
Total long-term debt, less current maturities, net		$ 244,409,000		$ 244,409,000		$ 256,811,000
Debt instrument, covenant, maximum leverage ratio		3.00		3.00
Debt instrument, covenant, minimum interest coverage ratio				1.50
Consolidated total leverage ratio				3.00
Consolidated fixed charge coverage ratio				1.50
Interest paid		$ 1,800,000	$ 1,600,000	$ 3,500,000	$ 2,900,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage				0.20%		0.225%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate		1.50%				1.75%
Debt instrument, effective interest rate		2.75%		2.75%		2.5625%
Prime Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate		0.50%				0.75%
Debt instrument, effective interest rate		4.75%		4.75%		4.50%
Scenario, Actual [Member]
Line of Credit Facility [Line Items]
Consolidated total leverage ratio				1.47
Consolidated fixed charge coverage ratio				4.02
Line of Credit [Member]
Line of Credit Facility [Line Items]
Total long-term debt		$ 181,926,000		$ 181,926,000		$ 190,427,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Total long-term debt		78,784,000		78,784,000		82,726,000
The 2015 Credit Facility [Member] | The Lenders [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 450,000,000.0	$ 360,000,000.0	$ 300,000,000.0	$ 250,000,000.0
The 2015 Credit Facility [Member] | The Lenders [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity							367,300,000.0	269,400,000.0	$ 225,000,000.0	175,000,000.0
The 2015 Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | The Lenders [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Long-term line of credit		181,000,000		181,000,000		187,000,000
The 2015 Credit Facility [Member] | Prime Rate [Member] | The Lenders [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Long-term line of credit		900,000		900,000		$ 3,400,000
The 2015 Credit Facility [Member] | Term Loan [Member] | The Lenders [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 82,700,000.0	$ 90,600,000.0		$ 75,000,000.0
Debt instrument, periodic payment	$ 3,900,000			2,700,000
The 2015 Credit Facility [Member] | Same Day Advance Swing Line [Member] | The Lenders [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		10,000,000.0		10,000,000.0
The 2015 Credit Facility [Member] | Sub Facility, Standby Letters of Credit [Member] | The Lenders [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 10,000,000.0		$ 10,000,000.0