DEFERRED FINANCING / DEBT ISSUANCE COSTS (Details) - USD ($)	Mar. 26, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ 3,100,000	$ 2,300,000
Total long-term debt	212,499,000	273,153,000
Less: Net deferred financing costs related to Term Loan	(561,000)	(576,000)
Total long-term debt, net of deferred financing costs	211,938,000	272,577,000
Less: current maturities of long-term debt	(15,766,000)	(15,766,000)
Total long-term debt, less current maturities, net	196,172,000	256,811,000
Total deferred financing costs, net	3,117,000	2,304,000
Less: Net deferred financing costs related to Term Loan	(561,000)	(576,000)
Net deferred financing costs related to 2015 Revolver	(2,556,000)	(1,728,000)
Line of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	450,000,000.0	360,000,000.0
Total long-term debt	$ 129,773,000	$ 190,427,000
Term Loan [Member]
Debt Instrument [Line Items]
Total commitment related to Term Loan, percent	18.00%	25.00%
Total long-term debt	$ 82,726,000	$ 82,726,000
Total long-term debt, net of deferred financing costs	$ 82,700,000	$ 90,600,000