v3.26.3
Shareholder Report, Line Graph (Details) - USD ($)
 5 Months Ended 12 Months Ended
Apr. 10, 2017
Aug. 31, 2016
Aug. 31, 2017
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2017
C000015521 [Member]                          
Account Value [Line Items]                          
Accumulated Value   $ 10,000   $ 12,231 $ 11,526 $ 11,819 $ 10,868 $ 10,842 $ 12,146 $ 11,338 $ 11,230 $ 10,297 $ 10,058
C000087984 [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   12,464 11,735 11,997 11,010 10,961 12,257 11,429 11,298 10,329 10,069
C000189669 [Member]                          
Account Value [Line Items]                          
Accumulated Value $ 10,000   $ 10,401 12,897 12,139 12,406 11,394 11,328 12,663 11,804 11,663 10,670  
C000015522 [Member]                          
Account Value [Line Items]                          
Accumulated Value   9,550   11,393 10,763 11,064 10,200 10,200 11,456 10,721 10,645 9,785 9,581
C000015524 [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   11,069 10,536 10,912 10,135 10,211 11,555 10,895 10,899 10,094 9,958
C000015525 [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   11,681 11,296 11,214 10,642 10,489 11,324 10,990 10,781 10,049 10,046
C000087985 [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   11,917 11,512 11,395 10,791 10,624 11,447 11,078 10,855 10,089 10,066
C000189670 [Member]                          
Account Value [Line Items]                          
Accumulated Value 10,000   10,294 12,220 11,801 11,678 11,056 10,882 11,721 11,339 11,099 10,321  
C000087986 [Member]                          
Account Value [Line Items]                          
Accumulated Value   9,550   10,880 10,558 10,498 9,987 9,876 10,689 10,399 10,228 9,549 9,570
C000087987 [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   10,580 10,335 10,362 9,932 9,887 10,782 10,568 10,472 9,858 9,954
S&P National AMT-Free Municipal Bond [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   12,007 11,531 11,554 10,927 10,695 11,668 11,302 10,972 10,103 10,073
S&P National AMT-Free Municipal Bond (Inception Date 4/10/2017) [Member]                          
Account Value [Line Items]                          
Accumulated Value 10,000   10,306 12,285 11,798 11,822 11,180 10,943 11,938 11,564 11,226 10,337  
S&P Municipal California 50% Investment Grade Bond/50% High Yield Bond [Member]                          
Account Value [Line Items]                          
Accumulated Value   10,000   12,515 12,020 12,151 11,212 11,135 12,442 11,777 11,456 10,604 10,260
S&P Municipal California 50% Investment Grade Bond/50% High Yield Bond (Inception Date 4/10/2017) [Member]                          
Account Value [Line Items]                          
Accumulated Value 10,000   10,333 12,604 12,106 12,238 11,292 11,215 12,531 11,861 11,538 10,680  
S&P Intermediate Term California AMT-Free Municipal Bond [Member]                          
Account Value [Line Items]                          
Accumulated Value   $ 10,000   11,820 11,501 11,329 10,828 10,632 11,305 11,134 10,779 10,083 $ 10,054
S&P Intermediate Term California AMT-Free Municipal Bond (Inception Date 4/10/2017) [Member]                          
Account Value [Line Items]                          
Accumulated Value $ 10,000   $ 10,247 $ 12,047 $ 11,722 $ 11,547 $ 11,037 $ 10,836 $ 11,522 $ 11,348 $ 10,986 $ 10,276