| Goodwill and Intangible Assets |
Goodwill and Intangible Assets Goodwill The following table represents changes in the carrying amount of goodwill: | | | | | | | | | | | | | | | (In thousands) | | Balance as of December 31, 2025 | | | | | $ | 737,946 | | | | | | | | | | | | | | | Foreign currency exchange rate fluctuations | | | | | (745) | | | Balance as of June 30, 2026 | | | | | $ | 737,201 | |
Intangible Assets, Net The carrying amounts and useful lives of intangible assets were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | Gross carrying amount (1) | | Accumulated amortization | | Foreign currency exchange rate fluctuations | | Net carrying amount | | Useful life (years) | | | | | | | | | | | | (In thousands, except for years) | | Customer relationships | $ | 306,419 | | | $ | (156,865) | | | $ | (1,340) | | | $ | 148,214 | | | 10 - 30 | | Acquired technology | 37,615 | | | (25,542) | | | — | | | 12,073 | | | 5 - 20 | | | | | | | | | | | | Patents | 1,656 | | | (1,080) | | | — | | | 576 | | | 2 - 20 | Total intangible assets, net | $ | 345,690 | | | $ | (183,487) | | | $ | (1,340) | | | $ | 160,863 | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Gross carrying amount (1) | | Accumulated amortization | | Foreign currency exchange rate fluctuations | | Net carrying amount | | Useful life (years) | | | | | | | | | | | | (In thousands, except for years) | | Customer relationships | $ | 306,419 | | | $ | (148,990) | | | $ | (1,317) | | | $ | 156,112 | | | 10 - 30 | | Acquired technology | 39,715 | | | (26,358) | | | — | | | 13,357 | | | 4 - 20 | | Trade names | 2,400 | | | (2,400) | | | — | | | — | | | 5 | | Patents | 1,656 | | | (1,020) | | | — | | | 636 | | | 2 - 20 | | | | | | | | | | | | | | | | | | | | | Total intangible assets, net | $ | 350,190 | | | $ | (178,768) | | | $ | (1,317) | | | $ | 170,105 | | | |
_________________________________________________ (1) The differences in gross carrying amounts between periods are primarily due to the write-off of certain fully amortized intangible assets. Amortization expense of intangible assets was $4.6 million and $5.3 million for the three months ended June 30, 2026 and 2025, respectively, and $9.2 million and $11.1 million for the six months ended June 30, 2026 and 2025, respectively. The estimated future amortization expenses for amortizable intangible assets were as follows: | | | | | | | June 30, 2026 | | | | (In thousands) | | Remaining six months of 2026 | $ | 8,794 | | | 2027 | 16,504 | | | 2028 | 15,449 | | | 2029 | 13,952 | | | 2030 | 10,444 | | | Thereafter | 95,720 | | | Total | $ | 160,863 | |
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