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Acquired Intangible Assets | 6 Months Ended
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Jun. 30, 2018
Acquired Intangible Assets [Abstract] |
Acquired Intangible Assets |
Note 8. | Acquired Intangible Assets
Acquired identifiable intangible assets consist of the following:
|  | June 30, 2018 |  |  | December 31, 2017 |
|  | (In thousands) |
Customer relationships |  | $ | 87,226 |  |  | $ | 87,290 |
Trademarks and trade names |  |  | 6,800 |  |  |  | 6,800 |
Non-compete agreements |  |  | 3,192 |  |  |  | 3,193 |
Patents |  |  | 723 |  |  |  | 723 |
Supply agreements |  |  | 800 |  |  |  | 800 |
Leaseholds |  |  | 160 |  |  |  | 160 |
Total acquired intangible assets |  |  | 98,901 |  |  |  | 98,966 |
Less accumulated amortization (1) |  |  | (47,668 | ) |  |  | (43,853 | )
Net acquired intangible assets |  | $ | 51,233 |  |  | $ | 55,113 |
| (1) | Applies to all intangible assets, except for trademarks and trade names totaling $5.2 million, which have indefinite useful lives and, as such, are not being amortized.
Total amortization expense for acquired intangible assets was $1.9 million and $3.8 million for the three months and six months ended June 30, 2018, respectively, and $2.1 million and $4.2 million for the comparable periods in 2017. Based on the current estimated useful lives assigned to our acquired intangible assets, amortization expense is estimated to be $3.7 million for the remainder of 2018, $6.3 million in 2019, $5.9 million in 2020, $4.6 million in 2021 and $25.5 million in the aggregate for the years 2022 through 2031.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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