v3.25.2
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2020
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2025
Class A                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class A (with sales charge)
Accumulated Value $ 11,877 $ 10,093 $ 9,127 $ 12,777 $ 10,283 $ 8,676 $ 8,818 $ 8,671 $ 7,225 $ 9,450 $ 11,445
Class C                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class C (with sales charge)
Accumulated Value 11,771 10,078 9,183 12,933 10,486 8,915 9,128 9,044 7,591 10,000 $ 11,257
Class R6                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R6
Accumulated Value 13,008 11,014 9,920 13,834 11,096 9,328 9,445 9,250 7,676 10,000 $ 12,578
Advisor Class                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Advisor Class
Accumulated Value 12,854 10,895 9,828 13,724 11,017 9,272 9,400 9,221 7,664 10,000 $ 12,416
Class A                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class A (with sales charge)
Accumulated Value 10,964 10,632 10,555 11,237 9,940 10,543 10,087 10,022 9,323 9,625 $ 11,729
Class C                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class C (with sales charge)
Accumulated Value 10,985 10,685 10,654 11,392 10,119 10,777 10,344 10,330 9,636 10,000 $ 11,702
Class R                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R
Accumulated Value 11,130 10,819 10,767 11,495 10,188 10,837 10,393 10,363 9,650 10,000 $ 11,867
Class R6                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R6
Accumulated Value 11,785 11,387 11,261 11,945 10,529 11,137 10,604 10,505 9,724 10,000 $ 12,651
Advisor Class                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Advisor Class
Accumulated Value 11,647 11,268 11,158 11,849 10,457 11,062 10,547 10,465 9,711 10,000 $ 12,491
Class A                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class A (with sales charge)
Accumulated Value 25,062 18,774 19,757 23,682 15,721 14,437 12,455 10,342 8,849 9,450 $ 27,030
Class C                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class C (with sales charge)
Accumulated Value 24,807 18,719 19,848 23,970 16,036 14,834 12,888 10,782 9,297 10,000 $ 26,551
Class R                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R
Accumulated Value 25,952 19,487 20,558 24,706 16,443 15,135 13,086 10,893 9,340 10,000 $ 27,917
Class R6                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R6
Accumulated Value 27,444 20,489 21,482 25,670 16,985 15,534 13,362 11,044 9,406 10,000 $ 29,691
Advisor Class                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Advisor Class
Accumulated Value 27,130 20,277 21,279 25,443 16,849 15,430 13,283 11,005 9,389 10,000 $ 29,333
Class A                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class A (with sales charge)
Accumulated Value 10,814 9,620 9,028 6,608 4,389 7,477 8,663 7,683 7,579 9,450 $ 10,071
Class C                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class C (with sales charge)
Accumulated Value 10,701 9,588 9,067 6,687 4,475 7,678 8,967 8,013 7,963 10,000 $ 9,890
Class R6                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R6
Accumulated Value 11,963 10,596 9,904 7,217 4,766 8,080 9,320 8,221 8,069 10,000 $ 11,178
Advisor Class                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Advisor Class
Accumulated Value 11,708 10,386 9,720 7,098 4,702 7,991 9,237 8,172 8,040 10,000 $ 10,926
Class A                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class A (with sales charge)
Accumulated Value 19,240 15,802 16,245 23,054 13,067 13,939 12,010 10,033 8,384 9,450 $ 18,614
Class C                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class C (with sales charge)
Accumulated Value 19,057 15,757 16,319 23,335 13,325 14,323 12,421 10,457 8,805 10,000 $ 18,299
Class R                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R
Accumulated Value 19,919 16,400 16,899 24,041 13,663 14,607 12,616 10,569 8,854 10,000 $ 19,222
Class R6                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R6
Accumulated Value 21,157 17,309 17,715 25,041 14,137 15,017 12,891 10,721 8,919 10,000 $ 20,548
Advisor Class                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Advisor Class
Accumulated Value 20,827 17,057 17,495 24,760 14,000 14,892 12,805 10,673 8,894 10,000 $ 20,192
Class A                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class A (with sales charge)
Accumulated Value 20,161 17,029 17,752 23,005 13,664 13,270 11,300 9,888 8,598 9,450 $ 20,618
Class C                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class C (with sales charge)
Accumulated Value 19,935 16,970 17,819 23,272 13,926 13,634 11,685 10,305 9,028 10,000 $ 20,238
Class R                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R
Accumulated Value 20,873 17,676 18,470 23,986 14,280 13,906 11,868 10,410 9,076 10,000 $ 21,299
Class R6                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Class R6
Accumulated Value 22,140 18,633 19,349 24,987 14,789 14,303 12,139 10,565 9,146 10,000 $ 22,719
Advisor Class                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Advisor Class
Accumulated Value 21,814 18,380 19,109 24,706 14,639 14,177 12,048 10,515 9,121 10,000 $ 22,364
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Russell 3000 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Index
Accumulated Value 27,086 22,147 21,819 22,520 14,922 15,079 13,382 11,837 9,982 10,000 $ 30,174
Bloomberg U.S. Aggregate Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Bloomberg U.S. Aggregate Index
Accumulated Value 10,786 10,947 10,994 12,017 12,049 10,870 10,324 10,357 10,272 10,000 $ 11,651
Bloomberg U.S. Aggregate Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Bloomberg U.S. Aggregate Index
Accumulated Value 10,786 10,947 10,994 12,017 12,049 10,870 10,324 10,357 10,272 10,000 $ 11,651
Bloomberg U.S. Aggregate Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Bloomberg U.S. Aggregate Index
Accumulated Value 10,786 10,947 10,994 12,017 12,049 10,870 10,324 10,357 10,272 10,000 $ 11,651
Bloomberg U.S. Aggregate Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Bloomberg U.S. Aggregate Index
Accumulated Value 10,786 10,947 10,994 12,017 12,049 10,870 10,324 10,357 10,272 10,000 $ 11,651
Bloomberg U.S. Aggregate Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Bloomberg U.S. Aggregate Index
Accumulated Value 10,786 10,947 10,994 12,017 12,049 10,870 10,324 10,357 10,272 10,000 $ 11,651
Russell 3000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Growth Index
Accumulated Value 34,605 26,467 25,886 27,782 18,228 16,651 14,279 12,021 10,032 10,000 $ 39,473
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 3000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Growth Index
Accumulated Value 34,605 26,467 25,886 27,782 18,228 16,651 14,279 12,021 10,032 10,000 $ 39,473
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 3000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Growth Index
Accumulated Value 34,605 26,467 25,886 27,782 18,228 16,651 14,279 12,021 10,032 10,000 $ 39,473
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 3000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Growth Index
Accumulated Value 34,605 26,467 25,886 27,782 18,228 16,651 14,279 12,021 10,032 10,000 $ 39,473
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 3000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 3000 Growth Index
Accumulated Value 34,605 26,467 25,886 27,782 18,228 16,651 14,279 12,021 10,032 10,000 $ 39,473
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 2000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 2000 Growth Index
Accumulated Value 18,140 16,141 16,025 21,786 12,879 14,187 13,270 11,381 9,173 10,000 $ 18,579
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 2000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 2000 Growth Index
Accumulated Value 18,140 16,141 16,025 21,786 12,879 14,187 13,270 11,381 9,173 10,000 $ 18,579
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 2000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 2000 Growth Index
Accumulated Value 18,140 16,141 16,025 21,786 12,879 14,187 13,270 11,381 9,173 10,000 $ 18,579
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 2000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 2000 Growth Index
Accumulated Value 18,140 16,141 16,025 21,786 12,879 14,187 13,270 11,381 9,173 10,000 $ 18,579
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell 2000 Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell 2000 Growth Index
Accumulated Value 18,140 16,141 16,025 21,786 12,879 14,187 13,270 11,381 9,173 10,000 $ 18,579
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell Midcap Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell Midcap Growth Index
Accumulated Value 24,058 19,932 19,619 23,561 15,302 15,268 12,978 11,105 9,587 10,000 $ 27,342
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell Midcap Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell Midcap Growth Index
Accumulated Value 24,058 19,932 19,619 23,561 15,302 15,268 12,978 11,105 9,587 10,000 $ 27,342
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell Midcap Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell Midcap Growth Index
Accumulated Value 24,058 19,932 19,619 23,561 15,302 15,268 12,978 11,105 9,587 10,000 $ 27,342
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell Midcap Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell Midcap Growth Index
Accumulated Value 24,058 19,932 19,619 23,561 15,302 15,268 12,978 11,105 9,587 10,000 $ 27,342
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
Russell Midcap Growth Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     Russell Midcap Growth Index
Accumulated Value 24,058 19,932 19,619 23,561 15,302 15,268 12,978 11,105 9,587 10,000 $ 27,342
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
NASDAQ Biotechnology Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     NASDAQ Biotechnology Index
Accumulated Value 11,898 11,969 10,749 13,908 11,148 9,556 9,304 8,903 8,019 10,000 $ 12,178
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
NASDAQ Biotechnology Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     NASDAQ Biotechnology Index
Accumulated Value 11,898 11,969 10,749 13,908 11,148 9,556 9,304 8,903 8,019 10,000 $ 12,178
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
NASDAQ Biotechnology Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     NASDAQ Biotechnology Index
Accumulated Value 11,898 11,969 10,749 13,908 11,148 9,556 9,304 8,903 8,019 10,000 $ 12,178
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
NASDAQ Biotechnology Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     NASDAQ Biotechnology Index
Accumulated Value 11,898 11,969 10,749 13,908 11,148 9,556 9,304 8,903 8,019 10,000 $ 12,178
S&P 500 Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500 Index
Accumulated Value 28,507 23,240 22,637 22,589 15,474 15,341 13,517 11,934 10,121 10,000 $ 31,955
S&P North American Natural Resources Sector Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P North American Natural Resources Sector Index
Accumulated Value 15,274 13,208 12,476 8,797 6,257 8,714 9,588 8,679 8,460 10,000 $ 14,723
S&P Global Natural Resources Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P Global Natural Resources Index
Accumulated Value 17,925 16,926 17,078 14,216 9,265 11,633 12,222 9,879 8,862 10,000 $ 16,720
S&P North American Natural Resources Sector Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P North American Natural Resources Sector Index
Accumulated Value 15,274 13,208 12,476 8,797 6,257 8,714 9,588 8,679 8,460 10,000 $ 14,723
S&P Global Natural Resources Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P Global Natural Resources Index
Accumulated Value 17,925 16,926 17,078 14,216 9,265 11,633 12,222 9,879 8,862 10,000 $ 16,720
S&P North American Natural Resources Sector Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P North American Natural Resources Sector Index
Accumulated Value 15,274 13,208 12,476 8,797 6,257 8,714 9,588 8,679 8,460 10,000 $ 14,723
S&P Global Natural Resources Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P Global Natural Resources Index
Accumulated Value 17,925 16,926 17,078 14,216 9,265 11,633 12,222 9,879 8,862 10,000 $ 16,720
S&P North American Natural Resources Sector Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P North American Natural Resources Sector Index
Accumulated Value 15,274 13,208 12,476 8,797 6,257 8,714 9,588 8,679 8,460 10,000 $ 14,723
S&P Global Natural Resources Index [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P Global Natural Resources Index
Accumulated Value $ 17,925 $ 16,926 $ 17,078 $ 14,216 $ 9,265 $ 11,633 $ 12,222 $ 9,879 $ 8,862 $ 10,000 $ 16,720