RETIREMENT BENEFIT PLANS (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	$ 15,000	$ 14,000	$ 45,000	$ 43,000
Expected return on plan assets	(15,000)	(14,000)	(47,000)	(42,000)
Amortization of net loss	9,000	12,000	28,000	35,000
Net periodic benefit cost	9,000	12,000	26,000	36,000
Entity's contributions towards pension plan	14,000		41,000
Expected future contributions in current fiscal year			14,000
Other Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	10,000	27,000	30,000	80,000
Amortization of net loss	(4,000)	15,000	(13,000)	44,000
Net periodic benefit cost	$ 6,000	$ 42,000	$ 17,000	$ 124,000