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Revenue - Revenue by Geography (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | $ 2,351,646 | $ 2,494,573 | $ 2,483,666
Intersegment elimination |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | (3,471) | (3,671) | (1,333)
U.S. Plans |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 1,163,308 | 1,257,253 | 1,230,554
North America, excluding U.S. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 97,343 | 106,319 | 105,466
Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 573,918 | 593,405 | 615,571
Asia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 424,451 | 430,175 | 420,333
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 96,097 | 111,092 | 113,075
FMT | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 895,474 | 956,523 | 951,275
FMT | Intersegment elimination |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | (830) | (505) | (277)
FMT | U.S. Plans | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 505,757 | 541,994 | 540,697
FMT | North America, excluding U.S. | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 52,822 | 58,256 | 57,917
FMT | Europe | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 174,945 | 170,698 | 172,630
FMT | Asia | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 109,089 | 125,031 | 119,822
FMT | Other | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 53,691 | 61,049 | 60,486
HST | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 893,353 | 912,623 | 895,970
HST | Intersegment elimination |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | (2,609) | (1,823) | (449)
HST | U.S. Plans | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 387,652 | 411,680 | 392,140
HST | North America, excluding U.S. | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 21,319 | 21,735 | 18,770
HST | Europe | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 249,793 | 263,523 | 278,634
HST | Asia | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 221,139 | 201,765 | 189,342
HST | Other | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 16,059 | 15,743 | 17,533
FSDP | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 562,819 | 625,427 | 636,421
FSDP | Intersegment elimination |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | (32) | (1,343) | (607)
FSDP | U.S. Plans | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 269,899 | 303,579 | 297,717
FSDP | North America, excluding U.S. | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 23,202 | 26,328 | 28,779
FSDP | Europe | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 149,180 | 159,184 | 164,307
FSDP | Asia | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | 94,223 | 103,379 | 111,169
FSDP | Other | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total net sales | $ 26,347 | $ 34,300 | $ 35,056

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