Revenue Recognition (Schedule of Disaggregate MC Segment Revenue by Significant Product or Service) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 900,610	$ 1,054,132	$ 982,479
Machine Clothing
Disaggregation of Revenue [Line Items]
Net sales	572,955	601,254	611,858
Machine Clothing | Americas PMC
Disaggregation of Revenue [Line Items]
Net sales	297,490	316,355	303,768
Machine Clothing | Eurasia PMC
Disaggregation of Revenue [Line Items]
Net sales	202,181	210,961	227,493
Machine Clothing | Engineered Fabrics
Disaggregation of Revenue [Line Items]
Net sales	$ 73,284	$ 73,938	$ 80,597