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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] |
Goodwill | The changes in the carrying amount of goodwill and accumulated impairment loss during the six months ended June 30, 2019 and year ended December 31, 2018 were as follows:
|  | Six Months Ended June 30, 2019 |  |  | Twelve Months Ended December 31, 2018 |
|  | Gross Carrying Amount |  |  | Accumulated Impairment Loss |  |  | Net |  |  | Gross Carrying Amount |  |  | Accumulated Impairment Loss |  |  | Net |
Beginning balance at January 1 |  | $ | 731,272 |  |  | $ | (144,276 | ) |  | $ | 586,996 |  |  | $ | 735,323 |  |  | $ | (144,276 | ) |  | $ | 591,047 |
Acquired goodwill (1) |  |  | 472,695 |  |  |  | — |  |  |  | 472,695 |  |  |  | — |  |  |  | — |  |  |  | — |
Foreign currency translation |  |  | (1,024 | ) |  |  | — |  |  |  | (1,024 | ) |  |  | (4,051 | ) |  |  | — |  |  |  | (4,051 | )
Ending balance at June 30, 2019 and December 31, 2018 |  | $ | 1,202,943 |  |  | $ | (144,276 | ) |  | $ | 1,058,667 |  |  | $ | 731,272 |  |  | $ | (144,276 | ) |  | $ | 586,996 |
(1) | During the six months ended June 30, 2019, the Company recorded $472,695 of goodwill related to the ESI Merger.
Intangible Assets | Intangible Assets Components of the Company’s intangible assets are comprised of the following:
As of June 30, 2019: |  | Gross |  |  | Accumulated Impairment Charges |  |  | Accumulated Amortization |  |  | Foreign Currency Translation |  |  | Net |
Completed technology (1) |  | $ | 446,431 |  |  | $ | (105 | ) |  | $ | (157,407 | ) |  | $ | (156 | ) |  | $ | 288,763 |
Customer relationships (1) |  |  | 308,144 |  |  |  | (1,406 | ) |  |  | (73,888 | ) |  |  | (677 | ) |  |  | 232,173 |
Patents, trademarks, trade names and other (1) |  |  | 120,895 |  |  |  | — |  |  |  | (42,567 | ) |  |  | 108 |  |  |  | 78,436 |
|  | $ | 875,470 |  |  | $ | (1,511 | ) |  | $ | (273,862 | ) |  | $ | (725 | ) |  | $ | 599,372 |
(1) | During the six months ended June 30, 2019, the Company recorded $316,200 of separately identified intangible assets related to the ESI Merger, of which $274,000 was completed technology, $25,400 was customer relationships and $16,800 was trademarks, trade names and backlog. Separately, on January 1, 2019, the Company reclassified $6,428 of gross favorable lease assets and $3,445 of related accumulated amortization from patents, trademarks, trade names and other to the right-of-use asset line in the balance sheet.
As of December 31, 2018: |  | Gross |  |  | Accumulated Impairment Charges |  |  | Accumulated Amortization |  |  | Foreign Currency Translation |  |  | Net |
Completed technology |  | $ | 172,431 |  |  | $ | (105 | ) |  | $ | (137,283 | ) |  | $ | (73 | ) |  | $ | 34,970 |
Customer relationships |  |  | 282,744 |  |  |  | (1,406 | ) |  |  | (63,788 | ) |  |  | (269 | ) |  |  | 217,281 |
Patents, trademarks, trade names and other |  |  | 110,523 |  |  |  | — |  |  |  | (42,954 | ) |  |  | (13 | ) |  |  | 67,556 |
|  | $ | 565,698 |  |  | $ | (1,511 | ) |  | $ | (244,025 | ) |  | $ | (355 | ) |  | $ | 319,807 |
Estimated Net Amortization Expense | Aggregate net amortization expense related to acquired intangible assets for future years is as follows:
Year |  | Amount |
2019 (remaining) |  | $ | 34,538 |
2020 |  |  | 55,565 |
2021 |  |  | 47,765 |
2022 |  |  | 45,294 |
2023 |  |  | 44,942 |
2024 |  |  | 44,024 |
Thereafter |  |  | 271,344 |

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