Revenue - Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total net sales	$ 624,246	$ 622,888	$ 1,888,576	$ 1,869,572
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(768)	(583)	(2,894)	(983)
U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	311,907	309,779	948,661	921,875
North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	25,828	0	76,300	0
Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	150,247	150,481	459,865	472,800
Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	107,877	105,257	321,012	313,640
Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	29,155	57,954	85,632	162,240
FMT
Disaggregation of Revenue [Line Items]
Total net sales	240,758	239,119	729,205	714,135
FMT | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	240,758	239,119	729,205	714,135
FMT | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(103)	(94)	(367)	(211)
FMT | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	133,710	131,403	411,645	403,903
FMT | North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	13,652	0	41,337	0
FMT | Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	46,830	46,895	134,403	130,591
FMT | Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	30,182	28,358	94,452	89,655
FMT | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	16,487	32,557	47,735	90,197
FMT | North America, Excluding United States Included in Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales		15,391		44,610
HST
Disaggregation of Revenue [Line Items]
Total net sales	228,988	222,351	685,848	670,685
HST | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	228,988	222,351	685,848	670,685
HST | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(622)	(75)	(1,305)	(219)
HST | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	103,891	99,474	309,135	290,826
HST | North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	5,450	0	15,839	0
HST | Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	65,339	66,762	200,509	214,564
HST | Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	51,378	46,634	149,939	139,422
HST | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	3,552	9,556	11,731	26,092
HST | North America, Excluding United States Included in Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales		6,348		13,705
FSDP
Disaggregation of Revenue [Line Items]
Total net sales	154,500	161,418	473,523	484,752
FSDP | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	154,500	161,418	473,523	484,752
FSDP | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(43)	(414)	(1,222)	(553)
FSDP | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	74,306	78,902	227,881	227,146
FSDP | North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	6,726	0	19,124	0
FSDP | Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	38,078	36,824	124,953	127,645
FSDP | Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	26,317	30,265	76,621	84,563
FSDP | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 9,116	15,841	$ 26,166	45,951
FSDP | North America, Excluding United States Included in Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales		$ 7,544		$ 21,450