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RESTRUCTURING AND ASSET IMPAIRMENTS - Rollforward of Severance and Retention Costs Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Restructuring Reserve [Roll Forward]      
Balance, beginning of period $ 2,969 $ 2,666 $ 2,782
Expense 8,454 6,173 7,792
Payments / utilization (7,473) (5,820) (7,900)
Foreign currency adjustments (270) (50) (8)
Balance, end of period $ 3,680 $ 2,969 $ 2,666