First Trust SMID Growth Strength ETF Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 90 Months Ended | |||||
---|---|---|---|---|---|---|---|---|
Mar. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
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The SMID Growth Strength Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | [1],[2] | |||||||
Nasdaq Riskalyze US Small Cap(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | 7.69% | 9.07% | 8.50% | |||||
Russell 3000® Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | 23.81% | 13.86% | 13.72% | |||||
S&P 1000® Index (reflects no deduction for fees, expenses or taxes)[Member] | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | 12.34% | 9.75% | 9.43% | |||||
First Trust SMID Growth Strength ETF | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | 6.45% | 8.25% | 7.71% | |||||
Performance Inception Date | Jun. 20, 2017 | |||||||
First Trust SMID Growth Strength ETF | After Taxes on Distributions | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | 5.26% | 7.36% | 6.83% | |||||
First Trust SMID Growth Strength ETF | After Taxes on Distributions and Sales | ||||||||
Prospectus [Line Items] | ||||||||
Average Annual Return, Percent | 3.79% | 6.07% | 5.71% | |||||
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