Revenue - Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total net sales	$ 622,231	$ 612,324
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(1,740)	(257)
U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	311,877	299,458
North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	23,929	0
Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	156,058	164,497
Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	103,536	95,179
Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	28,571	53,447
FMT
Disaggregation of Revenue [Line Items]
Total net sales	242,336	232,261
FMT | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	242,336	232,261
FMT | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(186)	(72)
FMT | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	138,149	133,153
FMT | North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	13,057	0
FMT | Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	43,624	43,599
FMT | Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	31,917	26,398
FMT | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	15,775	29,183
FMT | North America, Excluding United States Included in Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales		13,588
HST
Disaggregation of Revenue [Line Items]
Total net sales	224,688	220,967
HST | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	224,688	220,967
HST | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(602)	(108)
HST | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	99,051	93,808
HST | North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	4,892	0
HST | Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	69,372	73,779
HST | Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	48,059	44,548
HST | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	3,916	8,940
HST | North America, Excluding United States Included in Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales		3,320
FSDP
Disaggregation of Revenue [Line Items]
Total net sales	155,207	159,096
FSDP | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	155,207	159,096
FSDP | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(952)	(77)
FSDP | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	74,677	72,497
FSDP | North America, excluding U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	5,980	0
FSDP | Europe | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	43,062	47,119
FSDP | Asia | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	23,560	24,233
FSDP | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 8,880	15,324
FSDP | North America, Excluding United States Included in Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales		$ 7,609