Revenue Recognition (Schedule of Disaggregate MC Segment Revenue by Significant Product or Service) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Net sales	$ 251,600	$ 251,900	$ 255,400	$ 223,600	$ 226,700	$ 222,100	$ 215,600	$ 199,300	$ 213,000	$ 191,300	$ 203,200	$ 172,300	$ 982,479	$ 863,717	$ 779,839
Machine Clothing [Member]
Disaggregation of Revenue [Line Items]
Net sales													611,858	$ 590,357	$ 582,190
Americas PMC [Member]
Disaggregation of Revenue [Line Items]
Net sales													303,768
Eurasia PMC [Member]
Disaggregation of Revenue [Line Items]
Net sales													227,493
Engineered Fabrics [Member]
Disaggregation of Revenue [Line Items]
Net sales													$ 80,597