Impairment and Restructuring Charges - Impairment by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Restructuring Cost and Reserve
Severance costs	$ 1,373	$ 3,798	$ 4,025	$ 10,126
Other exit costs	(654)	1,053	430	1,593
Total restructuring costs	719	4,851	4,455	11,719
Impairments	600	3,084	5,675	5,669
Total impairment and restructuring charges	1,319	7,935	10,130	17,388
Operating Segments
Restructuring Cost and Reserve
Total impairment and restructuring charges	1,352	7,904	6,812	16,423
Operating Segments | North America
Restructuring Cost and Reserve
Severance costs	569	6	2,022	2,166
Other exit costs	0	16	(1)	50
Total restructuring costs	569	22	2,021	2,216
Impairments	451	1,111	1,208	3,065
Total impairment and restructuring charges	1,020	1,133	3,229	5,281
Operating Segments | Europe
Restructuring Cost and Reserve
Severance costs	445	2,022	1,471	3,693
Other exit costs	2	236	235	356
Total restructuring costs	447	2,258	1,706	4,049
Impairments	59	0	954	161
Total impairment and restructuring charges	506	2,258	2,660	4,210
Operating Segments | Australasia
Restructuring Cost and Reserve
Severance costs	359	1,726	542	3,262
Other exit costs	(623)	814	227	1,227
Total restructuring costs	(264)	2,540	769	4,489
Impairments	90	1,973	154	2,443
Total impairment and restructuring charges	(174)	4,513	923	6,932
Corporate and Unallocated Costs
Restructuring Cost and Reserve
Severance costs	0	44	(10)	1,005
Other exit costs	(33)	(13)	(31)	(40)
Total restructuring costs	(33)	31	(41)	965
Impairments	0	0	3,359	0
Total impairment and restructuring charges	$ (33)	$ 31	$ 3,318	$ 965