Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	$ 195,132	[1]	$ 198,022		$ 83,243
Translation adjustment	(2,218)		1,168		20
Goodwill adjustment			(4,058)
Goodwill acquired	9,492				114,759
Goodwill, balance at the end of the period	202,406		195,132	[1]	198,022
Vegetation Management
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	124,981		126,894		16,751
Translation adjustment	(1,510)		132		(72)
Goodwill adjustment			(2,045)
Goodwill acquired	9,492				110,215
Goodwill, balance at the end of the period	132,963		124,981		126,894
Industrial Equipment
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	70,151		71,128		66,492
Translation adjustment	(708)		1,036		92
Goodwill adjustment			(2,013)
Goodwill acquired	0				4,544
Goodwill, balance at the end of the period	$ 69,443		$ 70,151		$ 71,128

[1] Years ended December 31, 2020 amounts have been adjusted to reflect the change in inventory accounting method, as described in Note 1 to the Consolidated Financial Statements.