Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Movement in Valuation and Qualifying Accounts
Balance at beginning of period	$ 8,277	$ 9,813	$ 18,991
Charged to profit and loss	2,543	994	2,060
Currency Translation Adjustment	(76)	(365)	510
Deductions from reserves	(1,196)	(2,165)	(11,748)
Balance at close of period	9,548	8,277	9,813
Allowance for deferred income tax asset valuation
Movement in Valuation and Qualifying Accounts
Balance at beginning of period	33,228	27,864	81,923
Charged to profit and loss	4,141	10,769	7,728
Currency Translation Adjustment	(296)	(384)	5,762
Deductions from reserves	(1,858)	(5,021)	(67,549)
Balance at close of period	$ 35,215	$ 33,228	$ 27,864