Shareholder Report, Line Graph (Details) - USD ($) |
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| C000012098 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | $ 50,288 | $ 43,706 | $ 46,200 | $ 47,844 | $ 47,574 | $ 47,621 | $ 48,939 | $ 47,664 | $ 45,706 | $ 45,825 | $ 44,217 | $ 41,514 | $ 37,708 | $ 36,918 | $ 40,267 | $ 41,821 | $ 40,788 | $ 40,951 | $ 38,116 | $ 38,208 | $ 37,146 | $ 36,367 | $ 36,961 | $ 34,803 | $ 32,793 | $ 34,244 | $ 33,639 | $ 31,389 | $ 30,672 | $ 29,439 | $ 26,470 | $ 26,930 | $ 28,569 | $ 28,858 | $ 28,073 | $ 26,198 | $ 25,157 | $ 24,925 | $ 23,466 | $ 23,756 | $ 21,869 | $ 23,712 | $ 22,615 | $ 21,605 | $ 23,996 | $ 25,295 | $ 22,390 | $ 24,474 | $ 25,144 | $ 28,995 | $ 27,951 | $ 29,025 | $ 32,032 | $ 31,521 | $ 31,664 | $ 29,195 | $ 30,923 | $ 29,757 | $ 28,809 | $ 27,093 | $ 27,506 | $ 25,639 | $ 25,667 | $ 25,590 | $ 25,788 | $ 25,133 | $ 22,681 | $ 23,698 | $ 24,860 | $ 22,374 | $ 20,832 | $ 20,308 | $ 18,978 | $ 16,465 | $ 18,156 | $ 19,268 | $ 18,620 | $ 18,003 | $ 17,247 | $ 16,917 | $ 17,094 | $ 17,186 | $ 16,941 | $ 15,884 | $ 16,788 | $ 16,137 | $ 15,707 | $ 15,227 | $ 13,951 | $ 15,212 | $ 14,871 | $ 16,330 | $ 16,187 | $ 15,546 | $ 15,249 | $ 15,005 | $ 14,446 | $ 14,258 | $ 14,583 | $ 14,929 | $ 13,666 | $ 13,529 | $ 13,210 | $ 12,771 | $ 12,656 | $ 12,538 | $ 12,097 | $ 12,175 | $ 11,815 | $ 11,413 | $ 11,268 | $ 10,855 | $ 10,463 | $ 10,364 | $ 10,252 | $ 10,502 | $ 10,495 | $ 10,590 | $ 10,091 | $ 10,281 |
| C000012101 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 28,788 | 26,554 | 28,082 | 27,033 | 26,234 | 26,247 | 26,078 | 26,236 | 25,977 | 25,464 | 25,054 | 24,178 | 22,896 | 23,218 | 24,305 | 24,793 | 23,823 | 25,544 | 23,504 | 23,671 | 23,148 | 22,607 | 21,751 | 21,870 | 21,358 | 22,501 | 21,552 | 20,415 | 20,665 | 19,249 | 17,453 | 18,315 | 19,272 | 19,993 | 19,297 | 17,823 | 18,290 | 18,438 | 18,750 | 19,276 | 17,782 | 18,766 | 17,608 | 16,241 | 17,925 | 18,489 | 16,896 | 18,721 | 18,646 | 20,095 | 19,655 | 19,778 | 21,181 | 20,336 | 20,965 | 19,733 | 20,523 | 19,982 | 19,831 | 19,608 | 19,422 | 18,506 | 17,821 | 17,020 | 17,253 | 16,548 | 14,582 | 14,702 | 14,932 | 14,359 | 13,484 | 13,330 | 12,551 | 11,173 | 13,757 | 15,157 | 15,235 | 14,941 | 14,546 | 14,305 | 13,901 | 14,221 | 13,988 | 13,091 | 14,101 | 13,508 | 13,415 | 12,872 | 11,582 | 12,914 | 12,473 | 13,508 | 13,608 | 13,433 | 12,998 | 12,921 | 12,728 | 12,799 | 12,886 | 13,508 | 13,074 | 12,933 | 12,470 | 12,264 | 11,889 | 11,951 | 11,797 | 11,781 | 11,706 | 11,614 | 11,634 | 11,187 | 10,933 | 10,791 | 10,299 | 10,658 | 10,716 | 10,769 | 10,261 | 10,236 |
| C000012193 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 36,384 | 32,565 | 34,822 | 33,808 | 32,982 | 33,421 | 33,894 | 34,042 | 33,704 | 33,571 | 32,980 | 31,686 | 29,498 | 29,287 | 31,284 | 32,512 | 30,898 | 32,862 | 29,709 | 29,807 | 28,960 | 28,270 | 27,633 | 27,482 | 27,056 | 28,761 | 27,904 | 25,977 | 26,187 | 24,299 | 21,859 | 23,144 | 24,539 | 25,425 | 24,629 | 22,800 | 22,766 | 23,209 | 23,185 | 23,639 | 21,675 | 22,978 | 21,565 | 20,196 | 22,258 | 23,116 | 20,788 | 22,628 | 23,111 | 25,687 | 25,441 | 25,840 | 29,232 | 28,573 | 29,553 | 27,426 | 28,827 | 27,976 | 27,419 | 26,193 | 26,431 | 24,999 | 25,683 | 25,270 | 25,334 | 24,161 | 21,315 | 21,238 | 21,566 | 20,855 | 19,416 | 18,762 | 16,781 | 14,427 | 16,617 | 17,699 | 17,394 | 17,155 | 16,258 | 16,071 | 16,357 | 16,844 | 16,593 | 15,479 | 16,091 | 15,510 | 15,211 | 14,268 | 12,826 | 14,083 | 13,790 | 15,506 | 15,587 | 14,620 | 14,385 | 14,183 | 13,633 | 13,712 | 13,660 | 14,047 | 13,275 | 13,235 | 12,806 | 12,461 | 12,247 | 12,200 | 11,966 | 11,837 | 11,606 | 11,379 | 11,312 | 10,993 | 10,589 | 10,588 | 10,186 | 10,595 | 10,570 | 10,655 | 10,187 | 10,228 |
| C000012197 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 29,662 | 26,915 | 28,704 | 28,082 | 27,171 | 27,254 | 27,072 | 26,510 | 25,844 | 24,831 | 24,247 | 23,062 | 21,775 | 21,921 | 23,546 | 24,983 | 24,026 | 26,027 | 23,546 | 23,724 | 23,318 | 23,282 | 21,969 | 21,968 | 21,025 | 22,501 | 21,907 | 20,521 | 21,180 | 19,042 | 17,328 | 18,611 | 19,920 | 20,800 | 19,899 | 18,435 | 18,351 | 18,670 | 18,961 | 19,175 | 17,241 | 18,307 | 17,871 | 16,508 | 18,184 | 18,622 | 16,784 | 18,158 | 18,622 | 20,943 | 20,621 | 20,640 | 23,506 | 23,116 | 24,467 | 23,258 | 24,254 | 23,740 | 24,429 | 23,680 | 24,297 | 23,547 | 24,937 | 24,891 | 23,820 | 21,722 | 19,126 | 18,605 | 18,946 | 18,246 | 17,335 | 16,637 | 15,011 | 13,049 | 15,576 | 16,596 | 16,624 | 16,540 | 15,601 | 15,239 | 15,736 | 16,282 | 15,952 | 14,891 | 16,023 | 15,574 | 15,616 | 14,702 | 13,047 | 14,699 | 14,496 | 16,612 | 16,834 | 15,588 | 15,445 | 15,230 | 14,262 | 14,327 | 14,027 | 14,405 | 13,850 | 13,884 | 13,590 | 13,178 | 12,657 | 12,671 | 12,509 | 12,169 | 12,010 | 11,858 | 11,783 | 11,527 | 11,216 | 11,141 | 10,384 | 11,059 | 11,019 | 10,976 | 10,331 | 10,306 |
| C000012198 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 22,865 | 21,340 | 22,363 | 21,941 | 20,953 | 20,797 | 20,148 | 20,248 | 20,176 | 18,871 | 18,576 | 17,867 | 17,050 | 17,833 | 18,882 | 19,564 | 18,961 | 20,546 | 18,735 | 18,907 | 18,693 | 18,863 | 17,166 | 17,609 | 16,835 | 18,041 | 17,124 | 16,677 | 17,367 | 15,525 | 14,178 | 15,113 | 15,953 | 16,748 | 15,637 | 14,281 | 14,787 | 15,038 | 16,123 | 16,531 | 14,914 | 15,965 | 15,259 | 13,516 | 15,086 | 15,612 | 14,230 | 15,820 | 15,434 | 16,530 | 16,303 | 16,006 | 16,663 | 15,889 | 16,370 | 15,824 | 16,103 | 15,777 | 16,289 | 16,599 | 16,110 | 15,498 | 14,589 | 13,116 | 12,901 | 12,059 | 10,021 | 9,676 | 10,088 | 9,584 | 9,402 | 9,285 | 8,905 | 7,726 | 10,944 | 12,230 | 12,816 | 12,401 | 12,043 | 11,837 | 11,256 | 12,121 | 12,073 | 11,360 | 12,552 | 12,056 | 12,431 | 12,067 | 10,727 | 12,262 | 12,092 | 13,279 | 13,572 | 13,306 | 13,045 | 12,946 | 12,326 | 12,220 | 12,195 | 13,037 | 12,893 | 12,798 | 12,398 | 12,409 | 11,729 | 11,995 | 11,854 | 11,538 | 12,058 | 12,094 | 12,269 | 12,086 | 11,929 | 11,681 | 10,405 | 10,765 | 10,664 | 10,477 | 10,008 | 10,072 |
| C000012079 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 17,931 | 16,356 | 17,420 | 16,129 | 15,721 | 16,017 | 15,761 | 16,051 | 15,951 | 15,587 | 15,829 | 15,904 | 15,711 | 15,827 | 16,214 | 15,531 | 15,422 | 16,794 | 16,161 | 16,738 | 16,259 | 15,286 | 14,429 | 14,057 | 13,332 | 14,461 | 14,290 | 13,985 | 14,646 | 13,567 | 12,069 | 12,397 | 13,319 | 13,795 | 13,580 | 12,920 | 13,562 | 13,512 | 13,674 | 14,556 | 13,269 | 13,943 | 13,096 | 12,866 | 14,712 | 15,624 | 14,436 | 15,428 | 16,205 | 16,808 | 15,598 | 16,413 | 17,955 | 16,340 | 16,481 | 15,325 | 16,394 | 16,001 | 15,256 | 14,726 | 14,556 | 13,431 | 12,647 | 12,418 | 12,469 | 12,214 | 11,331 | 11,715 | 12,042 | 12,027 | 11,533 | 11,368 | 11,274 | 10,397 | 12,460 | 13,357 | 13,183 | 13,175 | 13,389 | 13,416 | 13,251 | 12,720 | 12,532 | 12,401 | 12,268 | 12,289 | 11,784 | 11,629 | 10,506 | 11,359 | 10,751 | 10,913 | 11,203 | 10,902 | 10,802 | 10,334 | 10,081 | 10,009 | 9,610 | 10,349 | 10,770 | 10,805 | 10,520 | 10,614 | 10,683 | 10,689 | 10,589 | 10,392 | 10,358 | 10,365 | 10,604 | 10,234 | 10,262 | 9,799 | 10,024 | 10,640 | 10,818 | 11,261 | 10,906 | 10,218 |
| Morningstar US Market Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 39,965 | 36,193 | 38,097 | 38,337 | 37,772 | 37,782 | 37,693 | 36,878 | 35,639 | 34,889 | 34,116 | 32,465 | 30,517 | 30,697 | 32,612 | 33,196 | 32,188 | 33,164 | 31,151 | 31,383 | 30,737 | 30,058 | 29,589 | 28,658 | 27,366 | 28,595 | 27,700 | 26,275 | 25,939 | 24,679 | 22,558 | 23,143 | 24,293 | 24,741 | 23,905 | 22,377 | 22,277 | 22,033 | 21,412 | 21,919 | 20,516 | 21,798 | 20,675 | 19,127 | 21,085 | 21,925 | 20,045 | 21,884 | 21,933 | 24,107 | 23,337 | 23,953 | 25,463 | 24,499 | 24,845 | 23,263 | 24,381 | 23,696 | 23,256 | 22,679 | 22,594 | 21,460 | 20,725 | 20,124 | 20,243 | 19,405 | 17,330 | 17,722 | 18,398 | 17,158 | 16,224 | 15,866 | 15,057 | 13,300 | 15,377 | 16,749 | 16,744 | 16,285 | 15,691 | 15,363 | 15,103 | 15,398 | 15,169 | 14,177 | 15,142 | 14,558 | 14,334 | 13,851 | 12,760 | 14,059 | 13,772 | 14,851 | 14,817 | 14,325 | 13,852 | 13,763 | 13,398 | 13,356 | 13,641 | 14,164 | 13,439 | 13,301 | 12,906 | 12,623 | 12,339 | 12,310 | 12,076 | 11,979 | 11,840 | 11,717 | 11,709 | 11,284 | 11,063 | 10,856 | 10,416 | 10,638 | 10,628 | 10,605 | 10,204 | 10,183 |
| Morningstar US Market Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 39,965 | 36,193 | 38,097 | 38,337 | 37,772 | 37,782 | 37,693 | 36,878 | 35,639 | 34,889 | 34,116 | 32,465 | 30,517 | 30,697 | 32,612 | 33,196 | 32,188 | 33,164 | 31,151 | 31,383 | 30,737 | 30,058 | 29,589 | 28,658 | 27,366 | 28,595 | 27,700 | 26,275 | 25,939 | 24,679 | 22,558 | 23,143 | 24,293 | 24,741 | 23,905 | 22,377 | 22,277 | 22,033 | 21,412 | 21,919 | 20,516 | 21,798 | 20,675 | 19,127 | 21,085 | 21,925 | 20,045 | 21,884 | 21,933 | 24,107 | 23,337 | 23,953 | 25,463 | 24,499 | 24,845 | 23,263 | 24,381 | 23,696 | 23,256 | 22,679 | 22,594 | 21,460 | 20,725 | 20,124 | 20,243 | 19,405 | 17,330 | 17,722 | 18,398 | 17,158 | 16,224 | 15,866 | 15,057 | 13,300 | 15,377 | 16,749 | 16,744 | 16,285 | 15,691 | 15,363 | 15,103 | 15,398 | 15,169 | 14,177 | 15,142 | 14,558 | 14,334 | 13,851 | 12,760 | 14,059 | 13,772 | 14,851 | 14,817 | 14,325 | 13,852 | 13,763 | 13,398 | 13,356 | 13,641 | 14,164 | 13,439 | 13,301 | 12,906 | 12,623 | 12,339 | 12,310 | 12,076 | 11,979 | 11,840 | 11,717 | 11,709 | 11,284 | 11,063 | 10,856 | 10,416 | 10,638 | 10,628 | 10,605 | 10,204 | 10,183 |
| Morningstar US Market Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 39,965 | 36,193 | 38,097 | 38,337 | 37,772 | 37,782 | 37,693 | 36,878 | 35,639 | 34,889 | 34,116 | 32,465 | 30,517 | 30,697 | 32,612 | 33,196 | 32,188 | 33,164 | 31,151 | 31,383 | 30,737 | 30,058 | 29,589 | 28,658 | 27,366 | 28,595 | 27,700 | 26,275 | 25,939 | 24,679 | 22,558 | 23,143 | 24,293 | 24,741 | 23,905 | 22,377 | 22,277 | 22,033 | 21,412 | 21,919 | 20,516 | 21,798 | 20,675 | 19,127 | 21,085 | 21,925 | 20,045 | 21,884 | 21,933 | 24,107 | 23,337 | 23,953 | 25,463 | 24,499 | 24,845 | 23,263 | 24,381 | 23,696 | 23,256 | 22,679 | 22,594 | 21,460 | 20,725 | 20,124 | 20,243 | 19,405 | 17,330 | 17,722 | 18,398 | 17,158 | 16,224 | 15,866 | 15,057 | 13,300 | 15,377 | 16,749 | 16,744 | 16,285 | 15,691 | 15,363 | 15,103 | 15,398 | 15,169 | 14,177 | 15,142 | 14,558 | 14,334 | 13,851 | 12,760 | 14,059 | 13,772 | 14,851 | 14,817 | 14,325 | 13,852 | 13,763 | 13,398 | 13,356 | 13,641 | 14,164 | 13,439 | 13,301 | 12,906 | 12,623 | 12,339 | 12,310 | 12,076 | 11,979 | 11,840 | 11,717 | 11,709 | 11,284 | 11,063 | 10,856 | 10,416 | 10,638 | 10,628 | 10,605 | 10,204 | 10,183 |
| Morningstar US Market Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 39,965 | 36,193 | 38,097 | 38,337 | 37,772 | 37,782 | 37,693 | 36,878 | 35,639 | 34,889 | 34,116 | 32,465 | 30,517 | 30,697 | 32,612 | 33,196 | 32,188 | 33,164 | 31,151 | 31,383 | 30,737 | 30,058 | 29,589 | 28,658 | 27,366 | 28,595 | 27,700 | 26,275 | 25,939 | 24,679 | 22,558 | 23,143 | 24,293 | 24,741 | 23,905 | 22,377 | 22,277 | 22,033 | 21,412 | 21,919 | 20,516 | 21,798 | 20,675 | 19,127 | 21,085 | 21,925 | 20,045 | 21,884 | 21,933 | 24,107 | 23,337 | 23,953 | 25,463 | 24,499 | 24,845 | 23,263 | 24,381 | 23,696 | 23,256 | 22,679 | 22,594 | 21,460 | 20,725 | 20,124 | 20,243 | 19,405 | 17,330 | 17,722 | 18,398 | 17,158 | 16,224 | 15,866 | 15,057 | 13,300 | 15,377 | 16,749 | 16,744 | 16,285 | 15,691 | 15,363 | 15,103 | 15,398 | 15,169 | 14,177 | 15,142 | 14,558 | 14,334 | 13,851 | 12,760 | 14,059 | 13,772 | 14,851 | 14,817 | 14,325 | 13,852 | 13,763 | 13,398 | 13,356 | 13,641 | 14,164 | 13,439 | 13,301 | 12,906 | 12,623 | 12,339 | 12,310 | 12,076 | 11,979 | 11,840 | 11,717 | 11,709 | 11,284 | 11,063 | 10,856 | 10,416 | 10,638 | 10,628 | 10,605 | 10,204 | 10,183 |
| Morningstar US Market Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 39,965 | 36,193 | 38,097 | 38,337 | 37,772 | 37,782 | 37,693 | 36,878 | 35,639 | 34,889 | 34,116 | 32,465 | 30,517 | 30,697 | 32,612 | 33,196 | 32,188 | 33,164 | 31,151 | 31,383 | 30,737 | 30,058 | 29,589 | 28,658 | 27,366 | 28,595 | 27,700 | 26,275 | 25,939 | 24,679 | 22,558 | 23,143 | 24,293 | 24,741 | 23,905 | 22,377 | 22,277 | 22,033 | 21,412 | 21,919 | 20,516 | 21,798 | 20,675 | 19,127 | 21,085 | 21,925 | 20,045 | 21,884 | 21,933 | 24,107 | 23,337 | 23,953 | 25,463 | 24,499 | 24,845 | 23,263 | 24,381 | 23,696 | 23,256 | 22,679 | 22,594 | 21,460 | 20,725 | 20,124 | 20,243 | 19,405 | 17,330 | 17,722 | 18,398 | 17,158 | 16,224 | 15,866 | 15,057 | 13,300 | 15,377 | 16,749 | 16,744 | 16,285 | 15,691 | 15,363 | 15,103 | 15,398 | 15,169 | 14,177 | 15,142 | 14,558 | 14,334 | 13,851 | 12,760 | 14,059 | 13,772 | 14,851 | 14,817 | 14,325 | 13,852 | 13,763 | 13,398 | 13,356 | 13,641 | 14,164 | 13,439 | 13,301 | 12,906 | 12,623 | 12,339 | 12,310 | 12,076 | 11,979 | 11,840 | 11,717 | 11,709 | 11,284 | 11,063 | 10,856 | 10,416 | 10,638 | 10,628 | 10,605 | 10,204 | 10,183 |
| S&P Total Market Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 39,443 | 35,719 | 37,574 | 37,781 | 37,201 | 37,203 | 37,145 | 36,345 | 35,132 | 34,352 | 33,586 | 31,949 | 30,026 | 30,233 | 32,136 | 32,755 | 31,781 | 32,769 | 30,722 | 30,943 | 30,319 | 29,683 | 29,147 | 28,269 | 26,988 | 28,233 | 27,349 | 25,939 | 25,656 | 24,353 | 22,264 | 22,880 | 24,030 | 24,510 | 23,658 | 22,141 | 22,045 | 21,826 | 21,267 | 21,771 | 20,352 | 21,623 | 20,539 | 18,989 | 20,942 | 21,764 | 19,897 | 21,724 | 21,768 | 23,926 | 23,175 | 23,772 | 25,291 | 24,365 | 24,730 | 23,173 | 24,275 | 23,600 | 23,201 | 22,627 | 22,525 | 21,425 | 20,704 | 20,062 | 20,127 | 19,263 | 17,165 | 17,538 | 18,208 | 16,988 | 16,079 | 15,717 | 14,916 | 13,170 | 15,280 | 16,642 | 16,663 | 16,197 | 15,606 | 15,282 | 15,023 | 15,332 | 15,110 | 14,120 | 15,095 | 14,517 | 14,311 | 13,825 | 12,729 | 14,038 | 13,763 | 14,864 | 14,840 | 14,342 | 13,877 | 13,786 | 13,408 | 13,360 | 13,630 | 14,154 | 13,441 | 13,307 | 12,915 | 12,641 | 12,340 | 12,317 | 12,089 | 11,979 | 11,858 | 11,736 | 11,726 | 11,309 | 11,094 | 10,882 | 10,419 | 10,653 | 10,633 | 10,605 | 10,199 | 10,179 |
| Morningstar US Large-Mid Cap Broad Growth Index (Spliced) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 51,361 | 44,634 | 47,180 | 48,858 | 48,579 | 48,626 | 49,971 | 48,667 | 46,668 | 46,789 | 45,149 | 42,388 | 38,498 | 37,691 | 41,109 | 42,694 | 41,638 | 41,805 | 38,909 | 39,001 | 37,916 | 37,119 | 37,723 | 35,519 | 33,467 | 34,947 | 34,328 | 32,030 | 31,298 | 30,038 | 27,014 | 27,483 | 29,155 | 29,448 | 28,647 | 26,732 | 25,671 | 25,433 | 23,945 | 24,241 | 22,316 | 24,196 | 23,076 | 22,045 | 24,484 | 25,810 | 22,845 | 24,969 | 25,653 | 29,582 | 28,516 | 29,611 | 32,677 | 32,157 | 32,302 | 29,783 | 31,542 | 30,354 | 29,385 | 27,633 | 28,054 | 26,148 | 26,173 | 26,090 | 26,287 | 25,613 | 23,109 | 24,141 | 25,320 | 22,781 | 21,208 | 20,669 | 19,311 | 16,751 | 18,466 | 19,594 | 18,931 | 18,299 | 17,527 | 17,188 | 17,365 | 17,455 | 17,203 | 16,125 | 17,041 | 16,376 | 15,936 | 15,446 | 14,147 | 15,426 | 15,074 | 16,544 | 16,397 | 15,743 | 15,438 | 15,188 | 14,619 | 14,427 | 14,751 | 15,085 | 13,743 | 13,611 | 13,278 | 12,814 | 12,700 | 12,580 | 12,133 | 12,209 | 11,845 | 11,439 | 11,292 | 10,875 | 10,479 | 10,378 | 10,264 | 10,512 | 10,504 | 10,597 | 10,095 | 10,284 |
| Morningstar US Mid Cap Index (Spliced) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 29,173 | 26,907 | 28,455 | 27,394 | 26,583 | 26,595 | 26,426 | 26,585 | 26,325 | 25,811 | 25,397 | 24,507 | 23,207 | 23,533 | 24,634 | 25,123 | 24,140 | 25,884 | 23,818 | 23,984 | 23,454 | 22,904 | 22,038 | 22,158 | 21,640 | 22,796 | 21,835 | 20,684 | 20,939 | 19,504 | 17,683 | 18,557 | 19,524 | 20,255 | 19,548 | 18,053 | 18,526 | 18,677 | 18,993 | 19,527 | 18,014 | 19,010 | 17,838 | 16,452 | 18,158 | 18,729 | 17,117 | 18,968 | 18,892 | 20,359 | 19,913 | 20,038 | 21,460 | 20,600 | 21,239 | 19,989 | 20,790 | 20,239 | 20,085 | 19,860 | 19,673 | 18,742 | 18,043 | 17,229 | 17,462 | 16,744 | 14,751 | 14,870 | 15,100 | 14,518 | 13,629 | 13,470 | 12,681 | 11,288 | 13,896 | 15,306 | 15,381 | 15,081 | 14,680 | 14,433 | 14,023 | 14,342 | 14,105 | 13,195 | 14,212 | 13,609 | 13,513 | 12,963 | 11,659 | 12,999 | 12,552 | 13,593 | 13,692 | 13,512 | 13,072 | 12,991 | 12,794 | 12,863 | 12,947 | 13,571 | 13,130 | 12,986 | 12,518 | 12,308 | 11,930 | 11,991 | 11,833 | 11,814 | 11,737 | 11,643 | 11,661 | 11,210 | 10,953 | 10,806 | 10,311 | 10,669 | 10,726 | 10,776 | 10,266 | 10,239 |
| Morningstar US Mid Cap Broad Growth Index (Spliced) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 36,930 | 33,052 | 35,342 | 34,310 | 33,472 | 33,917 | 34,397 | 34,548 | 34,205 | 34,072 | 33,473 | 32,158 | 29,936 | 29,719 | 31,744 | 32,988 | 31,348 | 33,340 | 30,138 | 30,236 | 29,375 | 28,671 | 28,028 | 27,873 | 27,443 | 29,172 | 28,302 | 26,345 | 26,556 | 24,642 | 22,166 | 23,469 | 24,883 | 25,781 | 24,973 | 23,116 | 23,083 | 23,533 | 23,508 | 23,969 | 21,977 | 23,297 | 21,863 | 20,476 | 22,565 | 23,437 | 21,077 | 22,941 | 23,430 | 26,042 | 25,791 | 26,195 | 29,633 | 28,963 | 29,959 | 27,801 | 29,222 | 28,354 | 27,786 | 26,545 | 26,782 | 25,331 | 26,018 | 25,594 | 25,653 | 24,460 | 21,573 | 21,489 | 21,815 | 21,091 | 19,615 | 18,948 | 16,944 | 14,566 | 16,773 | 17,862 | 17,550 | 17,304 | 16,396 | 16,204 | 16,489 | 16,976 | 16,720 | 15,593 | 16,206 | 15,617 | 15,313 | 14,359 | 12,903 | 14,165 | 13,867 | 15,595 | 15,673 | 14,698 | 14,458 | 14,252 | 13,696 | 13,773 | 13,717 | 14,103 | 13,325 | 13,281 | 12,849 | 12,499 | 12,282 | 12,233 | 11,995 | 11,862 | 11,630 | 11,399 | 11,330 | 11,008 | 10,603 | 10,600 | 10,200 | 10,609 | 10,581 | 10,663 | 10,192 | 10,231 |
| Morningstar US Small Cap Broad Growth Extended Index (Spliced) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 29,806 | 27,045 | 28,843 | 28,222 | 27,309 | 27,386 | 27,204 | 26,641 | 25,971 | 24,955 | 24,366 | 23,172 | 21,878 | 22,025 | 23,658 | 25,106 | 24,142 | 26,155 | 23,662 | 23,842 | 23,436 | 23,401 | 22,083 | 22,082 | 21,133 | 22,615 | 22,019 | 20,626 | 21,292 | 19,144 | 17,423 | 18,716 | 20,037 | 20,926 | 20,020 | 18,545 | 18,464 | 18,787 | 19,085 | 19,304 | 17,366 | 18,444 | 18,006 | 16,634 | 18,324 | 18,773 | 16,921 | 18,301 | 18,771 | 21,114 | 20,793 | 20,813 | 23,706 | 23,309 | 24,672 | 23,456 | 24,457 | 23,934 | 24,627 | 23,869 | 24,484 | 23,729 | 25,137 | 25,086 | 24,006 | 21,884 | 19,267 | 18,737 | 19,075 | 18,367 | 17,454 | 16,747 | 15,111 | 13,140 | 15,680 | 16,704 | 16,727 | 16,642 | 15,694 | 15,330 | 15,828 | 16,376 | 16,043 | 14,975 | 16,111 | 15,656 | 15,695 | 14,775 | 13,109 | 14,769 | 14,562 | 16,686 | 16,907 | 15,652 | 15,506 | 15,287 | 14,312 | 14,372 | 14,072 | 14,453 | 13,898 | 13,927 | 13,629 | 13,212 | 12,689 | 12,700 | 12,535 | 12,192 | 12,031 | 11,876 | 11,800 | 11,542 | 11,229 | 11,152 | 10,393 | 11,067 | 11,027 | 10,981 | 10,336 | 10,309 |
| Morningstar US Small Cap Broad Value Extended Index (Spliced) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | 23,190 | 21,642 | 22,678 | 22,253 | 21,252 | 21,092 | 20,434 | 20,536 | 20,465 | 19,147 | 18,848 | 18,127 | 17,297 | 18,095 | 19,158 | 19,850 | 19,236 | 20,843 | 19,006 | 19,179 | 18,961 | 19,134 | 17,409 | 17,856 | 17,069 | 18,290 | 17,356 | 16,903 | 17,603 | 15,733 | 14,370 | 15,319 | 16,170 | 16,979 | 15,853 | 14,478 | 14,993 | 15,249 | 16,359 | 16,777 | 15,140 | 16,206 | 15,488 | 13,716 | 15,308 | 15,844 | 14,442 | 16,057 | 15,666 | 16,775 | 16,542 | 16,242 | 16,907 | 16,118 | 16,605 | 16,053 | 16,332 | 15,996 | 16,522 | 16,844 | 16,340 | 15,728 | 14,804 | 13,306 | 13,086 | 12,230 | 10,160 | 9,808 | 10,222 | 9,708 | 9,522 | 9,395 | 9,010 | 7,815 | 11,070 | 12,365 | 12,955 | 12,532 | 12,167 | 11,958 | 11,366 | 12,226 | 12,173 | 11,451 | 12,651 | 12,146 | 12,524 | 12,153 | 10,799 | 12,345 | 12,171 | 13,364 | 13,658 | 13,386 | 13,120 | 13,017 | 12,391 | 12,279 | 12,251 | 13,099 | 12,950 | 12,850 | 12,444 | 12,450 | 11,765 | 12,027 | 11,885 | 11,566 | 12,084 | 12,121 | 12,293 | 12,106 | 11,947 | 11,696 | 10,415 | 10,775 | 10,677 | 10,486 | 10,009 | 10,074 |
| Cohen & Steers Realty Majors Index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | $ 18,571 | $ 16,934 | $ 18,030 | $ 16,690 | $ 16,262 | $ 16,564 | $ 16,296 | $ 16,590 | $ 16,481 | $ 16,101 | $ 16,347 | $ 16,420 | $ 16,218 | $ 16,333 | $ 16,728 | $ 16,018 | $ 15,902 | $ 17,312 | $ 16,655 | $ 17,244 | $ 16,746 | $ 15,740 | $ 14,853 | $ 14,467 | $ 13,714 | $ 14,871 | $ 14,692 | $ 14,373 | $ 15,047 | $ 13,935 | $ 12,392 | $ 12,724 | $ 13,666 | $ 14,151 | $ 13,926 | $ 13,246 | $ 13,900 | $ 13,846 | $ 14,006 | $ 14,906 | $ 13,584 | $ 14,270 | $ 13,400 | $ 13,161 | $ 15,045 | $ 15,973 | $ 14,754 | $ 15,763 | $ 16,552 | $ 17,164 | $ 15,923 | $ 16,752 | $ 18,320 | $ 16,668 | $ 16,805 | $ 15,624 | $ 16,709 | $ 16,304 | $ 15,542 | $ 14,995 | $ 14,818 | $ 13,669 | $ 12,869 | $ 12,632 | $ 12,680 | $ 12,417 | $ 11,515 | $ 11,902 | $ 12,231 | $ 12,212 | $ 11,708 | $ 11,538 | $ 11,429 | $ 10,536 | $ 12,622 | $ 13,526 | $ 13,347 | $ 13,334 | $ 13,548 | $ 13,571 | $ 13,400 | $ 12,860 | $ 12,666 | $ 12,530 | $ 12,392 | $ 12,409 | $ 11,896 | $ 11,737 | $ 10,601 | $ 11,459 | $ 10,841 | $ 11,002 | $ 11,291 | $ 10,985 | $ 10,880 | $ 10,406 | $ 10,148 | $ 10,072 | $ 9,668 | $ 10,410 | $ 10,831 | $ 10,862 | $ 10,573 | $ 10,665 | $ 10,731 | $ 10,735 | $ 10,631 | $ 10,430 | $ 10,392 | $ 10,397 | $ 10,633 | $ 10,259 | $ 10,284 | $ 9,816 | $ 10,040 | $ 10,657 | $ 10,831 | $ 11,273 | $ 10,914 | $ 10,220 |