Impairment and Restructuring Charges - Impairment by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Restructuring Cost and Reserve
Severance costs	$ 3,798	$ 3,513	$ 10,126	$ 6,637
Other exit costs	1,053	76	1,593	1,723
Total restructuring costs	4,851	3,589	11,719	8,360
Impairments	3,084	302	5,669	1,018
Total impairment and restructuring charges	7,935	3,891	17,388	9,378
Operating Segments | North America
Restructuring Cost and Reserve
Severance costs	6	1,824	2,166	2,495
Other exit costs	16	107	50	1,469
Total restructuring costs	22	1,931	2,216	3,964
Impairments	1,111	302	3,065	461
Total impairment and restructuring charges	1,133	2,233	5,281	4,425
Operating Segments | Europe
Restructuring Cost and Reserve
Severance costs	2,022	1,176	3,693	1,881
Other exit costs	236	(123)	356	(123)
Total restructuring costs	2,258	1,053	4,049	1,758
Impairments	0	0	161	0
Total impairment and restructuring charges	2,258	1,053	4,210	1,758
Operating Segments | Australasia
Restructuring Cost and Reserve
Severance costs	1,726	318	3,262	2,035
Other exit costs	814	0	1,227	2,033
Total restructuring costs	2,540	318	4,489	4,068
Impairments	1,973	0	2,443	0
Total impairment and restructuring charges	4,513	318	6,932	4,068
Corporate and Unallocated Costs
Restructuring Cost and Reserve
Severance costs	44	195	1,005	226
Other exit costs	(13)	92	(40)	(1,656)
Total restructuring costs	31	287	965	(1,430)
Impairments	0	0	0	557
Total impairment and restructuring charges	$ 31	$ 287	$ 965	$ (873)