Investments in Affiliates (Tables)

3 Months Ended

Mar. 31, 2017

Investments In And Advances To Affiliates Schedule Of Investments [Abstract]

Summary of Transactions in, and Earnings from, Investments in PowerShares Treasury Collateral Portfolio

The following is a summary of the transactions in, and earnings from, investments in PowerShares Treasury Collateral Portfolio for the three months ended March 31, 2017.

	Value 12/31/2016		Purchases at Cost		Proceeds from Sales		Change in Unrealized Appreciation (Depreciation)		Realized Gain (Loss)		Value 03/31/2017		Dividend Income
PowerShares Treasury Collateral Portfolio	$	—	$	249,990,226	$	—	$	84,458	$	—	$	250,074,684	$	—