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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Classes of Intangible Assets | Intangible assets as of March 31, 2018 and December 31, 2017 consisted of the following (in thousands):
|  |  |  | March 31, 2018
|  | Amortization Period |  | Cost |  | Accumulated Amortization |  | Net
Customer Relationships |  | 156 - 180 months |  | $ | 85,068 |  |  | $ | 12,336 |  |  | $ | 72,732 |
Non-Compete Agreement |  | 36 months |  | 26 |  |  | 7 |  |  | 19 |
Total |  |  |  | $ | 85,094 |  |  | $ | 12,343 |  |  | $ | 72,751 |
|  |  |  | December 31, 2017
|  | Amortization Period |  | Cost |  | Accumulated Amortization |  | Net
Customer Relationships |  | 156 - 180 months |  | $ | 85,068 |  |  | $ | 10,925 |  |  | $ | 74,143 |
Non-Compete Agreement |  | 36 months |  | 26 |  |  | 4 |  |  | 22 |
Trade Name |  | 24 months |  | 3,000 |  |  | 3,000 |  |  | — |
Total |  |  |  | $ | 88,094 |  |  | $ | 13,929 |  |  | $ | 74,165 |
Estimated Amortization Expense | The estimated amortization expense related to amortizable intangible assets for each of the five succeeding fiscal years and thereafter as of March 31, 2018 is as follows (in thousands):
Remainder of 2018 | $ | 4,271 |
2019 | 5,680 |
2020 | 5,671 |
2021 | 5,671 |
2022 | 5,671 |
Thereafter | 45,787 |
Total | $ | 72,751 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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