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Shareholder Report, Line Graph (Details) - USD ($)
6 Months Ended
Oct. 31, 2014
Jun. 30, 2014
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
C000147928                          
Account Value [Line Items]                          
Account Value $ 10,000   $ 23,517 $ 23,199 $ 20,400 $ 20,983 $ 16,343 $ 15,249 $ 12,143 $ 13,239 $ 12,216 $ 9,472 $ 10,173
C000147929                          
Account Value [Line Items]                          
Account Value $ 10,000   22,960 22,664 19,992 20,613 16,088 15,045 12,007 13,133 12,149 9,442 10,161
C000009765                          
Account Value [Line Items]                          
Account Value   $ 10,000 16,460 15,936 13,605 15,116 12,410 10,969 9,299 10,585 9,763 8,394 9,435
C000063871                          
Account Value [Line Items]                          
Account Value   10,000 16,714 16,161 13,777 15,292 12,538 11,066 9,367 10,642 9,801 8,411 9,440
C000009766                          
Account Value [Line Items]                          
Account Value   10,000 14,883 15,823 15,539 16,349 13,095 11,626 9,226 10,620 9,671 7,629 9,238
C000063872                          
Account Value [Line Items]                          
Account Value   $ 10,000 15,221 16,163 15,828 16,618 13,282 11,762 9,313 10,699 9,720 7,660 9,251
Russell 3000® Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name Russell 3000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index                        
Account Value $ 10,000   30,629 26,972 21,414 26,504 21,092 17,447 13,317 14,053 11,602 10,291 10,242
Russell 3000® Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 3000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index                      
Account Value   $ 10,000 31,475 27,717 22,005 27,236 21,675 17,929 13,685 14,442 11,922 10,576 10,525
Russell 3000® Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name Russell 3000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index                        
Account Value $ 10,000   30,629 26,972 21,414 26,504 21,092 17,447 13,317 14,053 11,602 10,291 10,242
Russell 3000® Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 3000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index                      
Account Value   $ 10,000 31,475 27,717 22,005 27,236 21,675 17,929 13,685 14,442 11,922 10,576 10,525
Russell 3000® Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 3000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index                      
Account Value   $ 10,000 31,475 27,717 22,005 27,236 21,675 17,929 13,685 14,442 11,922 10,576 10,525
Russell 3000® Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 3000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index                      
Account Value   $ 10,000 31,475 27,717 22,005 27,236 21,675 17,929 13,685 14,442 11,922 10,576 10,525
Russell Midcap® Value Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name Russell Midcap<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Value Index                        
Account Value $ 10,000   20,666 19,768 17,538 19,937 15,535 14,800 11,648 13,280 11,717 9,764 10,254
Russell Midcap® Value Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name Russell Midcap<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Value Index                        
Account Value $ 10,000   20,666 19,768 17,538 19,937 15,535 14,800 11,648 13,280 11,717 9,764 10,254
Russell 2000® Value Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 2000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Value Index                      
Account Value   $ 10,000 18,294 18,451 16,094 18,819 14,672 14,022 11,456 13,148 12,192 9,254 10,001
Russell 2000® Value Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 2000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Value Index                      
Account Value   $ 10,000 18,294 18,451 16,094 18,819 14,672 14,022 11,456 13,148 12,192 9,254 10,001
Russell 2000® Value Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 2000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Value Index                      
Account Value   $ 10,000 18,294 18,451 16,094 18,819 14,672 14,022 11,456 13,148 12,192 9,254 10,001
Russell 2000® Value Index                          
Account Value [Line Items]                          
Line Graph and Table Measure Name   Russell 2000<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Value Index                      
Account Value   $ 10,000 $ 18,294 $ 18,451 $ 16,094 $ 18,819 $ 14,672 $ 14,022 $ 11,456 $ 13,148 $ 12,192 $ 9,254 $ 10,001