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Other intangibles, net (Tables) | 12 Months Ended
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Dec. 31, 2017
Finite Lived Intangible Assets and Goodwill [Line Items] |
Schedule of other intangibles | Other intangibles consisted of the following as of December 31, 2017 and 2016:
| As of December 31,
| 2017 |  | 2016
Goodwill | $ | 58,094 |  |  | $ | 58,094 |
Customer relationships, net | 283,118 |  |  | 304,294 |
Contractual vendor intangible assets | 10,606 |  |  | 21,019 |
Tradename, net | 3,694 |  |  | 13,694 |
| $ | 355,512 |  |  | $ | 397,101 |
Customer Relationships And Other Intangible Assets [Member] |
Finite Lived Intangible Assets and Goodwill [Line Items] |
Schedule of customer relationships and tradename and other intangible assets and related accumulated amortization | The following tables present details of customer relationships and tradename and related accumulated amortization as of December 31, 2017 and 2016:
| As of December 31, 2017
| Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Customer relationships | $ | 360,000 |  |  | $ | (76,882 | ) |  | $ | 283,118 |
Tradename | 40,000 |  |  | (36,306 | ) |  | 3,694 |
| $ | 400,000 |  |  | $ | (113,188 | ) |  | $ | 286,812 |
| As of December 31, 2016
| Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Customer relationships | $ | 360,000 |  |  | $ | (55,706 | ) |  | $ | 304,294 |
Tradename | 40,000 |  |  | (26,306 | ) |  | 13,694 |
| $ | 400,000 |  |  | $ | (82,012 | ) |  | $ | 317,988 |
Schedule of estimated future amortization expense of intangible assets | As of December 31, 2017, the estimated future amortization expense for customer relationships and tradename was as follows:
| Estimated amortization expense
2018 | $ | 24,870 |
2019 | 21,176 |
2020 | 21,176 |
2021 | 21,176 |
2022 | 21,176 |
Thereafter | 177,238 |
| $ | 286,812 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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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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