Revenue - Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Total net sales	$ 581,113	$ 624,246	$ 1,736,824	$ 1,888,576
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(908)	(768)	(2,297)	(2,894)
U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	286,664	311,907	876,411	948,661
North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	24,803	25,828	71,632	76,300
Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	140,801	150,247	419,185	459,865
Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	103,585	107,877	301,986	321,012
Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	26,168	29,155	69,907	85,632
FMT
Disaggregation of Revenue [Line Items]
Total net sales	220,553	240,758	666,187	729,205
FMT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	220,553	240,758	666,187	729,205
FMT | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(194)	(103)	(533)	(367)
FMT | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	122,352	133,710	384,429	411,645
FMT | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	13,706	13,652	38,741	41,337
FMT | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	43,855	46,830	127,906	134,403
FMT | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	26,010	30,182	77,144	94,452
FMT | Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	14,824	16,487	38,500	47,735
HST
Disaggregation of Revenue [Line Items]
Total net sales	219,671	228,988	658,361	685,848
HST | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	219,671	228,988	658,361	685,848
HST | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(707)	(622)	(1,744)	(1,305)
HST | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	98,943	103,891	288,042	309,135
HST | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	5,417	5,450	15,911	15,839
HST | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	59,509	65,339	182,596	200,509
HST | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	52,197	51,378	161,342	149,939
HST | Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	4,312	3,552	12,214	11,731
FSDP
Disaggregation of Revenue [Line Items]
Total net sales	140,889	154,500	412,276	473,523
FSDP | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	140,889	154,500	412,276	473,523
FSDP | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(7)	(43)	(20)	(1,222)
FSDP | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	65,369	74,306	203,940	227,881
FSDP | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	5,680	6,726	16,980	19,124
FSDP | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	37,437	38,078	108,683	124,953
FSDP | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	25,378	26,317	63,500	76,621
FSDP | Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 7,032	$ 9,116	$ 19,193	$ 26,166