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CUSTOMER CONTRACTS AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of carrying amount and accumulated amortization for customer contracts | The carrying amount and accumulated amortization for customer contracts were as follows:
December 31, | 2017 |  | 2016
(in thousands) |  |  |
Customer contracts | $ | 290,628 |  |  | $ | 251,194 |
Less: Accumulated amortization | (137,759 | ) |  | (133,728 | )
Customer contracts, net | $ | 152,869 |  |  | $ | 117,466 |
Schedule of carrying amount and accumulated amortization for other intangible assets | The carrying amount and accumulated amortization for other intangible assets were as follows:
At December 31, | 2017 |  | 2016
(in thousands) |  |  |
Other intangible assets | $ | 75,780 |  |  | $ | 56,937 |
Less: Accumulated amortization | (14,232 | ) |  | (12,627 | )
Other intangible assets, net | $ | 61,548 |  |  | $ | 44,310 |
Schedule of customer contracts and other intangible assets | The carrying amount of customer contracts and other intangible assets, net were as follows:
December 31, | 2017 |  | 2016
(in thousands) |  |  |
Customer contracts, net | $ | 152,869 |  |  | $ | 117,466 |
Other intangible assets, net | 61,548 |  |  | 44,310 |
Customer contracts and other intangible assets, net | $ | 214,417 |  |  | $ | 161,776 |
Schedule of estimated amortization expense for the existing carrying amount of customer contracts and other intangible assets | Estimated amortization expense for the existing carrying amount of customer contracts and other intangible assets for each of the five succeeding fiscal years are as follows:
(in thousands) |
2018 | $ | 27,029 |
2019 | 24,052 |
2020 | 21,872 |
2021 | 20,431 |
2022 | 18,925 |

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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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