Class A - C000198605 Class A Class A1 - C000018281 Class A1 Class C - C000018282 Class C Class R6 - C000194407 Class R6 Advisor Class - C000073519 Advisor Class Broad Based Index:1C000198605-Bloomberg Municipal Bond Index_ Bloomberg Municipal Bond Index [Member] Additional Index:2C000198605-Bloomberg Municipal M.F. CA Intermediate Index [Member] Bloomberg Municipal M.F. CA Intermediate Index [Member] Industry Sector:4C000198605-Special Tax Special Tax [Member] Industry Sector:5C000198605-Housing Housing [Member] Industry Sector:6C000198605-Transportation Transportation [Member] Industry Sector:7C000198605-Industrial Dev. Revenue and Pollution Control Industrial Dev. Revenue and Pollution Control [Member] Industry Sector:8C000198605-Education Education [Member] Industry Sector:9C000198605-Utilities Utilities [Member] Industry Sector:10C000198605-Health Care Health Care [Member] Industry Sector:11C000198605-Local Local [Member] Industry Sector:12C000198605-State General Obligation State General Obligation [Member] Industry Sector:13C000198605-Lease Lease [Member] Industry Sector:14C000198605-Other Revenue Bonds Other Revenue Bonds [Member] Industry Sector:15C000198605-Refunded Refunded [Member] Broad Based Index:16C000018281-Bloomberg Municipal Bond Index_ Bloomberg Municipal Bond Index [Member] Additional Index:17C000018281-Bloomberg Municipal M.F. CA Intermediate Index [Member] Bloomberg Municipal M.F. CA Intermediate Index [Member] Industry Sector:19C000018281-Special Tax Special Tax [Member] Industry Sector:20C000018281-Housing Housing [Member] Industry Sector:21C000018281-Transportation Transportation [Member] Industry Sector:22C000018281-Industrial Dev. Revenue and Pollution Control Industrial Dev. Revenue and Pollution Control [Member] Industry Sector:23C000018281-Education Education [Member] Industry Sector:24C000018281-Utilities Utilities [Member] Industry Sector:25C000018281-Health Care Health Care [Member] Industry Sector:26C000018281-Local Local [Member] Industry Sector:27C000018281-State General Obligation State General Obligation [Member] Industry Sector:28C000018281-Lease Lease [Member] Industry Sector:29C000018281-Other Revenue Bonds Other Revenue Bonds [Member] Industry Sector:30C000018281-Refunded Refunded [Member] Broad Based Index:31C000018282-Bloomberg Municipal Bond Index_ Bloomberg Municipal Bond Index [Member] Additional Index:32C000018282-Bloomberg Municipal M.F. CA Intermediate Index [Member] Bloomberg Municipal M.F. CA Intermediate Index [Member] Industry Sector:34C000018282-Special Tax Special Tax [Member] Industry Sector:35C000018282-Housing Housing [Member] Industry Sector:36C000018282-Transportation Transportation [Member] Industry Sector:37C000018282-Industrial Dev. Revenue and Pollution Control Industrial Dev. Revenue and Pollution Control [Member] Industry Sector:38C000018282-Education Education [Member] Industry Sector:39C000018282-Utilities Utilities [Member] Industry Sector:40C000018282-Health Care Health Care [Member] Industry Sector:41C000018282-Local Local [Member] Industry Sector:42C000018282-State General Obligation State General Obligation [Member] Industry Sector:43C000018282-Lease Lease [Member] Industry Sector:44C000018282-Other Revenue Bonds Other Revenue Bonds [Member] Industry Sector:45C000018282-Refunded Refunded [Member] Broad Based Index:46C000194407-Bloomberg Municipal Bond Index Bloomberg Municipal Bond Index [Member] Additional Index:47C000194407-Bloomberg Municipal M.F. CA Intermediate Index [Member] Bloomberg Municipal M.F. CA Intermediate Index [Member] Industry Sector:48C000194407-Special Tax Special Tax [Member] Industry Sector:49C000194407-Housing Housing [Member] Industry Sector:50C000194407-Transportation Transportation [Member] Industry Sector:51C000194407-Industrial Dev. Revenue and Pollution Control Industrial Dev. Revenue and Pollution Control [Member] Industry Sector:52C000194407-Education Education [Member] Industry Sector:53C000194407-Utilities Utilities [Member] Industry Sector:54C000194407-Health Care Health Care [Member] Industry Sector:55C000194407-Local Local [Member] Industry Sector:56C000194407-State General Obligation State General Obligation [Member] Industry Sector:57C000194407-Lease Lease [Member] Industry Sector:58C000194407-Other Revenue Bonds Other Revenue Bonds [Member] Industry Sector:59C000194407-Refunded Refunded [Member] Broad Based Index:60C000073519-Bloomberg Municipal Bond Index_ Bloomberg Municipal Bond Index [Member] Additional Index:61C000073519-Bloomberg Municipal M.F. CA Intermediate Index [Member] Bloomberg Municipal M.F. CA Intermediate Index [Member] Industry Sector:62C000073519-Special Tax Special Tax [Member] Industry Sector:63C000073519-Housing Housing [Member] Industry Sector:64C000073519-Transportation Transportation [Member] Industry Sector:65C000073519-Industrial Dev. Revenue and Pollution Control Industrial Dev. Revenue and Pollution Control [Member] Industry Sector:66C000073519-Education Education [Member] Industry Sector:67C000073519-Utilities Utilities [Member] Industry Sector:68C000073519-Health Care Health Care [Member] Industry Sector:69C000073519-Local Local [Member] Industry Sector:70C000073519-State General Obligation State General Obligation [Member] Industry Sector:71C000073519-Lease Lease [Member] Industry Sector:72C000073519-Other Revenue Bonds Other Revenue Bonds [Member] Industry Sector:73C000073519-Refunded Refunded [Member] Net Assets Investment Company Portfolio Turnover Portfolio Turnover Commodity Index Linked Notes [Member] Commodity Index Linked Notes Sovereign Debt Securities [Member] Sovereign Debt Securities Convertible Debt Securities [Member] Convertible Debt Securities Corporate Debt Securities [Member] Corporate Debt Securities Corporate Note Securities [Member] Corporate Note Securities Corporate Bond Securities [Member] Corporate Bond Securities Fixed Income Investments [Member] Fixed Income Investments Securities Investment [Member] Securities Investment Other Aggregated Investments [Member] Other Aggregated Investments Real Estate Sector [Member] Real Estate Sector Standard Poors 500 Index [Member] Standard Poors 500 Index Nasdaq Composite Index [Member] Nasdaq Composite Index Equity Securities Industry [Member] Equity Securities Industry Equity Securities [Member] Equity Securities Dow Jones Industrial Average [Member] Dow Jones Industrial Average Construction Sector [Member] Construction Sector Automotive Sector [Member] Automotive Sector Transportation Sector [Member] Transportation Sector Aerospace Sector [Member] Aerospace Sector Consumer Sector [Member] Consumer Sector Chemicals Sector [Member] Chemicals Sector Insurance Sector [Member] Insurance Sector Cash [Member] Cash Asset Backed Securities [Member] Asset Backed Securities Container And PackagingSector [Member] Container And PackagingSector Investment Type [Axis] Asset Class US Treasury Securities [Member] US Treasury Securities Mortgage Backed Securities [Member] Mortgage Backed Securities Investment Type Categorization [Member] Investment Type Categorization Entertainment Sector [Member] Entertainment Sector Food And Beverage Sector [Member] Food And Beverage Sector Financial Services Sector [Member] Financial Services Sector Healthcare Sector [Member] Healthcare Sector Energy Sector [Member] Energy Sector Technology Sector [Member] Technology Sector Government Sector [Member] Government Sector No Trading Symbol