Revenue - Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total net sales	$ 561,249	$ 642,099	$ 1,155,711	$ 1,264,330
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(607)	(386)	(1,389)	(2,126)
U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	291,042	324,877	589,747	636,754
North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	20,916	26,543	46,829	50,472
Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	126,562	153,560	278,384	309,618
Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	103,698	109,599	198,401	213,135
Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	19,638	27,906	43,739	56,477
FMT
Disaggregation of Revenue [Line Items]
Total net sales	218,922	246,111	445,634	488,447
FMT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	218,922	246,111	445,634	488,447
FMT | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(190)	(78)	(339)	(264)
FMT | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	134,299	139,786	262,077	277,935
FMT | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	11,359	14,628	25,035	27,685
FMT | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	39,386	43,949	84,051	87,573
FMT | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	24,349	32,353	51,134	64,270
FMT | Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	9,719	15,473	23,676	31,248
HST
Disaggregation of Revenue [Line Items]
Total net sales	215,234	232,172	438,690	456,860
HST | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	215,234	232,172	438,690	456,860
HST | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(434)	(81)	(1,037)	(683)
HST | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	93,103	106,193	189,099	205,244
HST | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	4,526	5,497	10,494	10,389
HST | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	56,000	65,798	123,087	135,170
HST | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	57,806	50,502	109,145	98,561
HST | Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	4,233	4,263	7,902	8,179
FSDP
Disaggregation of Revenue [Line Items]
Total net sales	127,093	163,816	271,387	319,023
FSDP | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	127,093	163,816	271,387	319,023
FSDP | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	17	(227)	(13)	(1,179)
FSDP | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	63,640	78,898	138,571	153,575
FSDP | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	5,031	6,418	11,300	12,398
FSDP | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	31,176	43,813	71,246	86,875
FSDP | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	21,543	26,744	38,122	50,304
FSDP | Other | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 5,686	$ 8,170	$ 12,161	$ 17,050