v3.25.4
Shareholder Report, Line Graph (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended 15 Months Ended 18 Months Ended 21 Months Ended 24 Months Ended 27 Months Ended 30 Months Ended 33 Months Ended 36 Months Ended 39 Months Ended 42 Months Ended 45 Months Ended 48 Months Ended 51 Months Ended 54 Months Ended 57 Months Ended 60 Months Ended 63 Months Ended 66 Months Ended 69 Months Ended 72 Months Ended 75 Months Ended 78 Months Ended 81 Months Ended 84 Months Ended 87 Months Ended 90 Months Ended 93 Months Ended 96 Months Ended 99 Months Ended 102 Months Ended 105 Months Ended 108 Months Ended 111 Months Ended 114 Months Ended 117 Months Ended 120 Months Ended
Dec. 31, 2015
Mar. 31, 2016
Jun. 30, 2016
Sep. 30, 2016
Dec. 31, 2016
Mar. 31, 2017
Jun. 30, 2017
Sep. 30, 2017
Dec. 31, 2017
Mar. 31, 2018
Jun. 30, 2018
Sep. 30, 2018
Dec. 31, 2018
Mar. 31, 2019
Jun. 30, 2019
Sep. 30, 2019
Dec. 31, 2019
Mar. 31, 2020
Jun. 30, 2020
Sep. 30, 2020
Dec. 31, 2020
Mar. 31, 2021
Jun. 30, 2021
Sep. 30, 2021
Dec. 31, 2021
Mar. 31, 2022
Jun. 30, 2022
Sep. 30, 2022
Dec. 31, 2022
Mar. 31, 2023
Jun. 30, 2023
Sep. 30, 2023
Dec. 31, 2023
Mar. 31, 2024
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Mar. 31, 2025
Jun. 30, 2025
Sep. 30, 2025
Dec. 31, 2025
C000005423                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value $ 10,000 $ 10,047 $ 10,174 $ 10,598 $ 10,592 $ 11,155 $ 11,619 $ 12,062 $ 12,499 $ 12,494 $ 12,613 $ 12,925 $ 11,883 $ 13,017 $ 13,454 $ 13,605 $ 14,349 $ 12,267 $ 14,106 $ 14,965 $ 16,439 $ 16,958 $ 17,865 $ 17,877 $ 18,634 $ 17,576 $ 15,356 $ 14,468 $ 15,418 $ 16,313 $ 17,098 $ 16,592 $ 18,191 $ 19,286 $ 19,664 $ 20,745 $ 20,345 $ 20,562 $ 21,943 $ 23,044 $ 23,618
C000166328                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 500,000 502,567 509,193 530,642 530,550 559,030 582,509 604,965 627,105 626,869 633,103 648,998 596,709 654,195 676,118 684,025 721,684 616,971 709,816 753,378 827,552 853,995 900,012 900,915 939,393 886,388 774,728 729,977 778,541 823,664 863,601 838,340 919,474 975,161 994,619 1,049,731 1,029,820 1,041,210 1,111,179 1,167,405 1,197,306
MSCI All Country World Index Net                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,024 10,123 10,660 10,786 11,532 12,024 12,647 13,372 13,244 13,314 13,884 12,113 13,588 14,079 14,075 15,335 12,059 14,376 15,545 17,828 18,643 20,021 19,810 21,133 20,000 16,868 15,717 17,252 18,512 19,656 18,987 21,082 22,810 23,464 25,016 24,769 24,441 27,258 29,336 30,302
MSCI All Country World Index Net                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 500,000 501,191 506,147 532,982 539,321 576,579 601,217 632,373 668,608 662,179 665,712 694,184 605,663 679,402 703,942 703,759 766,753 602,935 718,812 777,254 891,388 932,137 1,001,052 990,498 1,056,628 999,984 843,381 785,865 862,589 925,608 982,785 949,345 1,054,099 1,140,497 1,173,221 1,250,816 1,238,447 1,222,044 1,362,904 1,466,796 1,515,084
Morningstar Moderate Target Risk Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,215 10,460 10,816 10,857 11,312 11,606 12,000 12,448 12,336 12,409 12,722 11,856 12,885 13,289 13,411 14,112 12,224 13,781 14,443 15,922 16,267 17,077 16,962 17,544 16,634 14,748 13,875 14,952 15,599 15,985 15,460 16,929 17,591 17,638 18,868 18,329 18,638 19,916 20,836 21,252
Morningstar Moderate Target Risk Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value $ 500,000 $ 510,734 $ 523,011 $ 540,807 $ 542,853 $ 565,577 $ 580,300 $ 600,012 $ 622,423 $ 616,786 $ 620,473 $ 636,122 $ 592,817 $ 644,269 $ 664,427 $ 670,534 $ 705,606 $ 611,202 $ 689,025 $ 722,125 $ 796,076 $ 813,343 $ 853,852 $ 848,097 $ 877,197 $ 831,690 $ 737,395 $ 693,744 $ 747,593 $ 779,930 $ 799,273 $ 773,014 $ 846,453 $ 879,564 $ 881,894 $ 943,395 $ 916,430 $ 931,915 $ 995,795 $ 1,041,794 $ 1,062,577