DEFERRED FINANCING / DEBT ISSUANCE COSTS (Details) - USD ($)	Sep. 25, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ 2,400,000	$ 2,500,000
Total long-term debt	280,855,000	204,484,000
Less: Net deferred financing costs related to Term Loan	(610,000)	(628,000)
Total long-term debt, net of deferred financing costs	280,245,000	203,856,000
Less: current maturities of long-term debt	(15,766,000)	(10,714,000)
Total long-term debt, less current maturities, net	264,479,000	193,142,000
Total deferred financing costs, net	2,440,000	2,513,000
Net deferred financing costs related to 2015 Revolver	(1,830,000)	(1,885,000)
Line of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		300,000,000.0
Total long-term debt	190,246,000	$ 137,520,000
Term Loan [Member]
Debt Instrument [Line Items]
Total commitment related to Term Loan, percent		25.00%
Total long-term debt	$ 90,609,000	$ 66,964,000
Total long-term debt, net of deferred financing costs		$ 75,000,000.0