BANK CREDIT ARRANGEMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 26, 2015
Bank Credit Arrangements
Outstanding amount	$ 746	$ 976
Short-term borrowings
Bank Credit Arrangements
Total line of credit facility for short-term borrowings	109,424
Outstanding amount	0	199
Unused and available borrowings	$ 109,424
Weighted average interest rate on short-term borrowings (as a percent)	5.23%
Other short-term bank loans
Bank Credit Arrangements
Outstanding amount	$ 746	$ 777