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Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2018
Accounting Policies [Abstract] |
Summary of Reclassifications to Conform to the Current Year's Consolidated Financial Statement Presentation | The following table summarizes these reclassifications for the three and six months ended June 30, 2017, which had no effect on previously reported net income.
Operating Revenues: |  | Three Months Ended June 30, 2017 |  |  | Six Months Ended June 30, 2017 |
Advisory fees (previously reported) |  | $ | 56,114 |  |  | $ | 109,376 |
Other ETP fees reclassified to Other income |  |  | (258 | ) |  |  | (492 | )
Advisory fees (currently reported) |  | $ | 55,856 |  |  | $ | 108,884 |
Settlement gain (previously reported) |  | $ | 6,909 |  |  | $ | 6,909 |
Reclassify to Other Income/(Expenses) |  |  | (6,909 | ) |  |  | (6,909 | )
Settlement gain (currently reported) |  | $ | — |  |  | $ | — |
Other income (previously reported) |  | $ | 405 |  |  | $ | 1,742 |
Other ETP fees reclassified from Advisory fees |  |  | 258 |  |  |  | 492 |
Interest income reclassified to Other Income/(Expenses) |  |  | (641 | ) |  |  | (1,225 | )
Realized and unrealized losses reclassified to Other gains and losses, net |  |  | 364 |  |  |  | 519 |
Miscellaneous other income reclassified to Other gains and losses, net |  |  | — |  |  |  | (803 | )
Other income (currently reported) |  | $ | 386 |  |  | $ | 725 |
Total revenues (currently reported) |  | $ | 56,242 |  |  | $ | 109,609 |
Other Income/(Expenses): |  |  |  |  |  |  |  |
Interest income reclassified from operating revenues |  | $ | 641 |  |  | $ | 1,225 |
Settlement gain reclassified from operating revenues |  | $ | 6,909 |  |  | $ | 6,909 |
Other gains and losses, net (previously reported) |  | $ | — |  |  | $ | — |
Realized and unrealized losses reclassified from operating revenues |  |  | (364 | ) |  |  | (519 | )
Miscellaneous other income reclassified from operating revenues |  |  | — |  |  |  | 803 |
Other gains and losses, net (currently reported) |  | $ | (364 | ) |  | $ | 284 |
Schedule of Estimated Useful Lives of Related Assets | Depreciation is provided for using the straight-line method over the estimated useful lives of the related assets as follows:
|  | Equipment |  | 5 years
|  | Furniture and fixtures |  | 15 years

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