Significant Accounting Policies (Tables)

9 Months Ended

Sep. 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 nine months ended September 30, 2017, which had no effect on previously reported net income.

Operating Revenues:	Three Months Ended September 30, 2017			Nine Months Ended September 30, 2017
Advisory fees (previously reported)	$	57,574		$	166,950
Other ETP fees reclassified to Other income		(281	)		(773	)
Advisory fees (currently reported)	$	57,293		$	166,177
Settlement gain (previously reported)	$	—		$	6,909
Reclassify to Other Income/(Expenses)		—			(6,909	)
Settlement gain (currently reported)	$	—		$	—
Other income (previously reported)	$	412		$	2,154
Other ETP fees reclassified from Advisory fees		281			773
Interest income reclassified to Other Income/(Expenses)		(772	)		(1,999	)
Realized and unrealized losses reclassified to Other gains and losses, net		535			1,054
Miscellaneous other income reclassified to Other gains and losses, net		(35	)		(837	)
Other income (currently reported)	$	421		$	1,145
Total revenues (currently reported)	$	57,714		$	167,322
Other Income/(Expenses):
Interest income reclassified from operating revenues	$	772		$	1,999
Settlement gain reclassified from operating revenues	$	—		$	6,909
Other gains and losses, net (previously reported)	$	—		$	—
Realized and unrealized losses reclassified from operating revenues		(535	)		(1,054	)
Miscellaneous other income reclassified from operating revenues		35			837
Other gains and losses, net (currently reported)	$	(500	)	$	(217	)

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