Impairment and Restructuring Charges - Impairment by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Restructuring Cost and Reserve
Severance costs	$ 760	$ 4,450	$ 2,652	$ 6,328
Other exit costs	685	334	1,084	541
Total restructuring costs	1,445	4,784	3,736	6,869
Impairments	821	950	5,075	2,584
Total impairment and restructuring charges	2,266	5,734	8,811	9,453
Operating Segments
Restructuring Cost and Reserve
Total impairment and restructuring charges	2,252	4,787	5,460	8,519
Operating Segments | North America
Restructuring Cost and Reserve
Severance costs	509	1,629	1,453	2,159
Other exit costs	0	38	(1)	34
Total restructuring costs	509	1,667	1,452	2,193
Impairments	757	523	757	1,954
Total impairment and restructuring charges	1,266	2,190	2,209	4,147
Operating Segments | Europe
Restructuring Cost and Reserve
Severance costs	115	523	1,026	1,671
Other exit costs	38	121	233	121
Total restructuring costs	153	644	1,259	1,792
Impairments	0	0	895	161
Total impairment and restructuring charges	153	644	2,154	1,953
Operating Segments | Australasia
Restructuring Cost and Reserve
Severance costs	136	1,337	183	1,537
Other exit costs	633	189	850	413
Total restructuring costs	769	1,526	1,033	1,950
Impairments	64	427	64	469
Total impairment and restructuring charges	833	1,953	1,097	2,419
Corporate and Unallocated Costs
Restructuring Cost and Reserve
Severance costs	0	961	(10)	961
Other exit costs	14	(14)	2	(27)
Total restructuring costs	14	947	(8)	934
Impairments	0	0	3,359	0
Total impairment and restructuring charges	$ 14	$ 947	$ 3,351	$ 934