|Alerian Energy Infrastructure ETF|
|The investment seeks investment results that correspond generally to the Alerian Energy Infrastructure Index (AMEI).
The underlying index is a composite of North American energy infrastructures engaged in the pipeline transportation, storage, and processing of energy commodities. Each underlying index constituent is assigned to one of four categories: U.S. Energy Infrastructure MLPs; U.S. General Partners; U.S. Energy Infrastructure Companies; and Canadian Energy Infrastructure Companies. The fund will normally invest at least 90% of its total assets in securities that comprise the underlying index. It is non-diversified.|
| ||ENFR||Category Avg|
|Annual Report Expense Ratio (net)||0.65%||N/A|
|Annual Holdings Turnover||27.00%||N/A|
|Total Net Assets||NaN||N/A|