| Intangible Assets Disclosure |
INTANGIBLE ASSETS The following table presents the major components of intangible assets as of December 31, 2016 and 2015:
| | | | | | | | | | | | | | | | (Amounts in thousands) | | Average
Amortization
Period | | | | Accumulated | | Net Carrying | | (in Years) | | Cost | | Amortization | | Value | As of December 31, 2016 | | | | | | | | | Patents | | 14 | | $ | 12,770 |
| | $ | (12,078 | ) | | $ | 692 |
| Trademarks/Tradenames | | 12 | | 117,124 |
| | (82,723 | ) | | 34,401 |
| Customer relationships | | 13 | | 217,861 |
| | (150,310 | ) | | 67,551 |
| Other | | 4 | | 5,661 |
| | (4,146 | ) | | 1,515 |
| Total intangible assets | | 12 | | $ | 353,416 |
| | $ | (249,257 | ) | | $ | 104,159 |
| | | | | | | | | | As of December 31, 2015 | | | | |
| | |
| | |
| Patents | | 14 | | $ | 12,770 |
| | $ | (11,136 | ) | | $ | 1,634 |
| Trademarks/Tradenames | | 12 | | 116,965 |
| | (76,249 | ) | | 40,716 |
| Customer relationships | | 13 | | 217,709 |
| | (133,532 | ) | | 84,177 |
| Other | | 5 | | 5,360 |
| | (3,503 | ) | | 1,857 |
| Total intangible assets | | 12 | | $ | 352,804 |
| | $ | (224,420 | ) | | $ | 128,384 |
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Amortization expense related to these intangible assets for the years ended December 31, 2016, 2015, and 2014 was approximately $25.1 million, $25.3 million, and $22.1 million, respectively. Estimated amortization expense for fiscal years 2017 through 2021 is shown in the following table: | | | | | | Amortization | (Amounts in thousands) | expense | | | 2017 | $ | 20,703 |
| 2018 | 19,886 |
| 2019 | 15,784 |
| 2020 | 11,104 |
| 2021 | 6,707 |
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