Goodwill (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	$ 84,761	$ 74,825	$ 75,509
Translation adjustment	(2,376)	2,195	(684)
Goodwill acquired	858	7,741
Goodwill, balance at the end of the period	83,243	84,761	74,825
Industrial
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	61,682	56,447	56,293
Translation adjustment	(659)	389	154
Goodwill acquired	84	4,846
Goodwill, balance at the end of the period	61,107	61,682	56,447
Agricultural
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	6,357	3,489	2,984
Translation adjustment	(901)	(27)	505
Goodwill acquired	774	2,895
Goodwill, balance at the end of the period	6,230	6,357	3,489
European
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	16,722	14,889	16,232
Translation adjustment	(816)	1,833	(1,343)
Goodwill acquired	0	0
Goodwill, balance at the end of the period	$ 15,906	$ 16,722	$ 14,889