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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Estimated Amortization Expense For Intangibles Subject To Amortization | The following table sets forth the estimated amortization expense for intangibles subject to amortization for the next five years and thereafter:
Period/Year |  | Total Amortization Expense
| (in thousands)
2018 |  | $ | 4,364 |
2019 |  | $ | 4,165 |
2020 |  | $ | 4,165 |
2021 |  | $ | 4,165 |
2022 |  | $ | 4,165 |
Thereafter |  | $ | 9,859 |

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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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