S000010780 [Member] Average Annual Total Returns	3 Months Ended	12 Months Ended	60 Months Ended	94 Months Ended	120 Months Ended	146 Months Ended	268 Months Ended
S000010780 [Member] Average Annual Total Returns	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024
Bloomberg California 3-15 Year Blend Municipal Bond Index (reflects no deductions for fees, expenses or taxes)
Prospectus [Line Items]
Average Annual Return, Percent		0.66%	0.97%		2.01%
Bloomberg Municipal Bond Index (reflects no deductions for fees, expenses or taxes)
Prospectus [Line Items]
Average Annual Return, Percent		1.05%	0.99%		2.25%
C000029800 [Member]
Prospectus [Line Items]
Average Annual Return, Percent		(2.09%)	(0.09%)		1.31%
Performance Inception Date								Sep. 09, 2002
C000029800 [Member] \| After Taxes on Distributions
Prospectus [Line Items]
Average Annual Return, Percent		(2.09%)	(0.09%)		1.31%
Performance Inception Date								Sep. 09, 2002
C000029800 [Member] \| After Taxes on Distributions and Sales
Prospectus [Line Items]
Average Annual Return, Percent		(0.26%)	0.45%		1.55%
Performance Inception Date								Sep. 09, 2002
C000029803 [Member]
Prospectus [Line Items]
Average Annual Return, Percent		1.32%	0.81%		1.89%
Performance Inception Date							Aug. 19, 2002
C000122571 [Member]
Prospectus [Line Items]
Average Annual Return, Percent		1.22%	0.82%		1.93%
Performance Inception Date						Nov. 08, 2012
C000174633 [Member]
Prospectus [Line Items]
Average Annual Return, Percent		1.38%	0.87%		1.96%
Performance Inception Date				Mar. 01, 2017
C000255077 [Member]
Prospectus [Line Items]
Average Annual Return, Percent		1.31%	0.81%		1.89%
Performance Inception Date	Oct. 02, 2024