Leases Maturity (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Remaining nine months of 2019	$ 10,332
2020	11,387
2021	7,836
2022	5,300
2023	2,260
Thereafter	1,964
Total lease payments	39,081
Less interest	2,722
Total	36,359
Remaining nine months of 2019	768
2020	1,371
2021	1,190
2022	272
2023	71
Thereafter	0
Total lease payments	3,672
Less interest	184
Total	$ 3,488
2019		$ 14,023
2020		11,272
2021		7,712
2022		5,129
2023		2,060
Thereafter		1,923
Total lease payments		$ 42,119