Identified Intangible Assets and Goodwill, Net Schedule of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 42,285	$ 37,971	$ 37,971
Goodwill, acquisitions	1,356	1,232	4,174
Goodwill, translation and other adjustments	139	125
Goodwill	43,780	39,328	42,285
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	2,053
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2,325
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2,020
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,888
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,431
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	1,377
Intangible Assets, Net (Excluding Goodwill)	11,095		10,934
Utility [Member]
Goodwill [Line Items]
Goodwill	4,911	4,911	4,911
Goodwill, acquisitions	0	0
Goodwill, translation and other adjustments	0	0
Goodwill	4,911	4,911	4,911
Residential commercial [Member]
Goodwill [Line Items]
Goodwill	37,374	33,060	33,060
Goodwill, acquisitions	1,356	1,232
Goodwill, translation and other adjustments	139	125
Goodwill	$ 38,869	$ 34,417	$ 37,374