Product Warranty (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Activity for accrued warranty expense
Balance at beginning of period	$ 3,594	$ 3,580	$ 4,048	$ 3,331
Provision	1,555	1,650	2,885	4,738
Claims paid/costs incurred	(1,432)	(1,592)	(3,162)	(4,417)
Foreign currency translation and other	56	295	2	281
Balance at end of period	$ 3,773	$ 3,933	$ 3,773	$ 3,933
Minimum
Product Warranty Liability [Line Items]
Product warranty period			1 year
Maximum
Product Warranty Liability [Line Items]
Product warranty period			2 years