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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill for the six months ended June 30, 2019, by reportable business segment, were as follows:
| FMT |  | HST |  | FSDP |  | IDEX
Balance at December 31, 2018 | $ | 581,041 |  |  | $ | 745,357 |  |  | $ | 371,557 |  |  | $ | 1,697,955 |
Foreign currency translation | (610 | ) |  | 637 |  |  | (833 | ) |  | (806 | )
Acquisition adjustments | — |  |  | 183 |  |  | — |  |  | 183 |
Balance at June 30, 2019 | $ | 580,431 |  |  | $ | 746,177 |  |  | $ | 370,724 |  |  | $ | 1,697,332 |
Schedule of Gross Carrying Value and Accumulated Amortization For Each Major Class of Intangible Asset | The following table provides the gross carrying value and accumulated amortization for each major class of intangible asset at June 30, 2019 and December 31, 2018:
| At June 30, 2019 |  |  |  | At December 31, 2018
| Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Weighted Average Life |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Patents | $ | 6,555 |  |  | $ | (4,986 | ) |  | $ | 1,569 |  |  | 12 |  | $ | 6,468 |  |  | $ | (4,693 | ) |  | $ | 1,775 |
Trade names | 115,890 |  |  | (60,962 | ) |  | 54,928 |  |  | 16 |  | 115,899 |  |  | (57,227 | ) |  | 58,672 |
Customer relationships | 253,470 |  |  | (92,394 | ) |  | 161,076 |  |  | 14 |  | 256,202 |  |  | (85,652 | ) |  | 170,550 |
Unpatented technology | 97,494 |  |  | (40,384 | ) |  | 57,110 |  |  | 12 |  | 96,922 |  |  | (35,685 | ) |  | 61,237 |
Other | 700 |  |  | (542 | ) |  | 158 |  |  | 10 |  | 700 |  |  | (507 | ) |  | 193 |
Total amortized intangible assets | 474,109 |  |  | (199,268 | ) |  | 274,841 |  |  |  |  | 476,191 |  |  | (183,764 | ) |  | 292,427 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Banjo trade name | 62,100 |  |  | — |  |  | 62,100 |  |  |  |  | 62,100 |  |  | — |  |  | 62,100 |
Akron Brass trade name | 28,800 |  |  | — |  |  | 28,800 |  |  |  |  | 28,800 |  |  | — |  |  | 28,800 |
Total intangible assets | $ | 565,009 |  |  | $ | (199,268 | ) |  | $ | 365,741 |  |  |  |  | $ | 567,091 |  |  | $ | (183,764 | ) |  | $ | 383,327 |

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