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Goodwill and Other Intangible Assets - Intangibles and Amortization Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | $ 2,277,349 | $ 2,075,215 |
Finite-Lived Intangible Assets, Accumulated Amortization | 1,290,419 | 1,116,854 |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 96,842 | 96,653 |
Intangible Assets, Gross (Excluding Goodwill) | 2,374,191 | 2,171,868 |
Finite-Lived Intangible Assets, Net | 986,930 | 958,361 |
Intangible Assets, Net (Excluding Goodwill) | 1,083,772 | 1,055,014 |
Acquired intangible assets, net | 134,049 |  |
Amortization expense | 139,043 | 138,947 | $ 143,868
Acquisition-related amortization expense | 137,071 | 136,963 | $ 142,170
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |  |
Next 12 Months | 139,794 |  |
+2 Years | 125,272 |  |
+3 Years | 115,224 |  |
+4 Years | 110,524 |  |
+5 Years | 105,761 |  |
Customer Intangibles [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 1,559,771 | 1,410,636 |
Finite-Lived Intangible Assets, Accumulated Amortization | 834,798 | 714,566 |
Finite-Lived Intangible Assets, Net | 724,973 | 696,070 |
Trademarks [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 233,205 | 218,064 |
Finite-Lived Intangible Assets, Accumulated Amortization | 103,907 | 85,791 |
Finite-Lived Intangible Assets, Net | 129,298 | 132,273 |
Acquired intangible assets, net | 9,614 |  |
Patents [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 163,299 | 159,376 |
Finite-Lived Intangible Assets, Accumulated Amortization | 141,182 | 133,677 |
Finite-Lived Intangible Assets, Net | 22,117 | 25,699 |
Unpatented Technologies [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 180,947 | 154,505 |
Finite-Lived Intangible Assets, Accumulated Amortization | 113,404 | 99,276 |
Finite-Lived Intangible Assets, Net | 67,543 | 55,229 |
Acquired intangible assets, net | 21,125 |  |
Distributor Relationships [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 87,028 | 82,779 |
Finite-Lived Intangible Assets, Accumulated Amortization | 51,611 | 44,202 |
Finite-Lived Intangible Assets, Net | 35,417 | 38,577 |
Drawings and Manuals [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 29,198 | 27,500 |
Finite-Lived Intangible Assets, Accumulated Amortization | 26,193 | 22,403 |
Finite-Lived Intangible Assets, Net | 3,005 | 5,097 |
Other Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 23,901 | 22,355 |
Finite-Lived Intangible Assets, Accumulated Amortization | 19,324 | 16,939 |
Finite-Lived Intangible Assets, Net | 4,577 | 5,416 |
Trademarks [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | 0 | 0 |
Indefinite-lived Intangible Assets (Excluding Goodwill) | $ 96,842 | $ 96,653 |

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