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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | The changes in the carrying amount of goodwill and accumulated impairment loss during the three months ended March 31, 2019 and year ended December 31, 2018 were as follows:
|  | Three Months Ended March 31, 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) |  |  | 471,403 |  |  |  | — |  |  |  | 471,403 |  |  |  | — |  |  |  | — |  |  |  | — |
Foreign currency translation |  |  | (1,068 | ) |  |  | — |  |  |  | (1,068 | ) |  |  | (4,051 | ) |  |  | — |  |  |  | (4,051 | )
Ending balance at March 31, 2019 and December 31, 2018 |  | $ | 1,201,607 |  |  | $ | (144,276 | ) |  | $ | 1,057,331 |  |  | $ | 731,272 |  |  | $ | (144,276 | ) |  | $ | 586,996 |
(1) | During the three months ended March 31, 2019, the Company recorded $471,403 of goodwill related to the ESI Merger.
Intangible Assets | Components of the Company’s intangible assets are comprised of the following:
As of March 31, 2019: |  | Gross |  |  | Accumulated Impairment Charges |  |  | Accumulated Amortization |  |  | Foreign Currency Translation |  |  | Net |
Completed technology(1) |  | $ | 448,831 |  |  | $ | (105 | ) |  | $ | (146,614 | ) |  | $ | (162 | ) |  | $ | 301,950 |
Customer relationships(1) |  |  | 308,144 |  |  |  | (1,406 | ) |  |  | (68,738 | ) |  |  | (819 | ) |  |  | 237,181 |
Patents, trademarks, trade names and other(1) |  |  | 120,895 |  |  |  | — |  |  |  | (40,976 | ) |  |  | 41 |  |  |  | 79,960 |
|  | $ | 877,870 |  |  | $ | (1,511 | ) |  | $ | (256,328 | ) |  | $ | (940 | ) |  | $ | 619,091 |
(1) | During the three months ended March 31, 2019, the Company recorded $318,600 of separately identified intangible assets related to the ESI Merger, of which $276,400 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 |  |  | 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) |  | $ | 51,638 |
2020 |  |  | 55,751 |
2021 |  |  | 47,958 |
2022 |  |  | 45,480 |
2023 |  |  | 45,121 |
2024 |  |  | 44,204 |
Thereafter |  |  | 273,039 |

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