Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
60 Months Ended |
120 Months Ended |
Apr. 30, 2026 |
Apr. 30, 2026 |
Apr. 30, 2026 |
| C000029800 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia California Intermediate Municipal Bond Fund Class A (including sales charges) ($11,323)
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| Average Annual Return, Percent |
2.01%
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0.09%
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1.25%
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| C000255077 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia California Intermediate Municipal Bond Fund Class S ($11,964)
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| C000122571 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia California Intermediate Municipal Bond Fund Institutional 2 Class ($12,013)
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| C000174633 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia California Intermediate Municipal Bond Fund Institutional 3 Class ($12,059)
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| C000029803 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia California Intermediate Municipal Bond Fund Institutional Class ($11,964)
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| C000029792 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia Short Duration Municipal Bond Fund Class A (including sales charges) ($11,313)
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| Average Annual Return, Percent |
2.98%
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1.20%
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1.24%
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| C000255076 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia Short Duration Municipal Bond Fund Class S ($11,720)
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| C000122570 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia Short Duration Municipal Bond Fund Institutional 2 Class ($11,783)
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| C000174632 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia Short Duration Municipal Bond Fund Institutional 3 Class ($11,809)
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| C000029795 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Columbia Short Duration Municipal Bond Fund Institutional Class ($11,720)
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| Without Sales Load [Member] | C000029800 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.19%
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0.70%
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1.56%
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| Without Sales Load [Member] | C000255077 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.46%
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0.95%
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1.81%
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| Without Sales Load [Member] | C000122571 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.59%
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0.96%
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1.85%
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| Without Sales Load [Member] | C000174633 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.52%
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1.02%
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1.89%
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| Without Sales Load [Member] | C000029803 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.46%
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0.95%
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1.81%
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| Without Sales Load [Member] | C000029792 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.00%
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1.42%
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1.35%
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| Without Sales Load [Member] | C000255076 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.26%
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1.67%
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1.60%
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| Without Sales Load [Member] | C000122570 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.32%
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1.70%
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1.65%
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| Without Sales Load [Member] | C000174632 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.34%
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1.74%
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1.68%
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| Without Sales Load [Member] | C000029795 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.26%
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1.67%
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1.60%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Municipal Bond Index ($12,429)
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| Average Annual Return, Percent |
6.34%
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0.90%
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2.20%
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| Columbia Threadneedle: Bloomberg California 3-15 Year Blend Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California 3-15 Year Blend Municipal Bond Index ($12,201)
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| Average Annual Return, Percent |
6.10%
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1.05%
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2.01%
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| Columbia Threadneedle: Bloomberg California 3-15 Year Blend Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California 3-15 Year Blend Municipal Bond Index ($12,201)
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| Average Annual Return, Percent |
6.10%
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1.05%
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2.01%
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| Columbia Threadneedle: Bloomberg California 3-15 Year Blend Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California 3-15 Year Blend Municipal Bond Index ($12,201)
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| Average Annual Return, Percent |
6.10%
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1.05%
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2.01%
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| Columbia Threadneedle: Bloomberg California 3-15 Year Blend Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California 3-15 Year Blend Municipal Bond Index ($12,201)
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| Average Annual Return, Percent |
6.10%
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1.05%
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2.01%
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| Columbia Threadneedle: Bloomberg California 3-15 Year Blend Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California 3-15 Year Blend Municipal Bond Index ($12,201)
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| Average Annual Return, Percent |
6.10%
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1.05%
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2.01%
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| Columbia Threadneedle: Bloomberg 1-5 Year Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1-5 Year Municipal Bond Index ($11,758)
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| Average Annual Return, Percent |
4.09%
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1.42%
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1.63%
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| Columbia Threadneedle: Bloomberg 1-5 Year Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1-5 Year Municipal Bond Index ($11,758)
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| Average Annual Return, Percent |
4.09%
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1.42%
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1.63%
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| Columbia Threadneedle: Bloomberg 1-5 Year Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1-5 Year Municipal Bond Index ($11,758)
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| Average Annual Return, Percent |
4.09%
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1.42%
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1.63%
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| Columbia Threadneedle: Bloomberg 1-5 Year Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1-5 Year Municipal Bond Index ($11,758)
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| Average Annual Return, Percent |
4.09%
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1.42%
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1.63%
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| Columbia Threadneedle: Bloomberg 1-5 Year Municipal Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1-5 Year Municipal Bond Index ($11,758)
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| Average Annual Return, Percent |
4.09%
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1.42%
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1.63%
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