RETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 25, 2015	Sep. 26, 2014
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	$ 15	$ 15	$ 44	$ 45
Expected return on plan assets	(16)	(15)	(49)	(47)
Amortization of net loss	13	9	37	28
Net periodic benefit cost	12	9	32	26
Entity's contributions towards pension plan	18		54
Expected future contributions in current fiscal year			18
Other Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	12	10	37	30
Amortization of net loss	8	(4)	25	(13)
Net periodic benefit cost	$ 20	$ 6	$ 62	$ 17