Shareholder Report, Average Annual Return (Details)
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6 Months Ended |
12 Months Ended |
60 Months Ended |
120 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2016 |
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
| C000002934 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Keeley Small Cap Fund - Class AAA
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| C000002933 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Keeley Small Cap Fund - Class C
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| Average Annual Return, Percent |
17.16%
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39.99%
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8.99%
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12.56%
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| C000061068 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Keeley Small Cap Fund - Class I
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| C000002931 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Keeley Small Cap Fund - Class A
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| Average Annual Return, Percent |
13.83%
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36.41%
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8.91%
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12.82%
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| C000002912 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Balanced Fund - Class AAA
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| C000002914 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Balanced Fund - Class C
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| Average Annual Return, Percent |
(1.99%)
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4.64%
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3.94%
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5.55%
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| C000061063 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Balanced Fund - Class I
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| C000002911 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Balanced Fund - Class A
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| Average Annual Return, Percent |
(4.60%)
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2.16%
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3.89%
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5.79%
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| C000002922 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Convertible Securities Fund - Class AAA
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| C000002921 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Convertible Securities Fund - Class C
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| Average Annual Return, Percent |
(3.19%)
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17.83%
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1.35%
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7.24%
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| C000061065 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Convertible Securities Fund - Class I
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| C000002919 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Convertible Securities Fund - Class A
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| Average Annual Return, Percent |
(5.80%)
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14.96%
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1.27%
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7.49%
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| C000002918 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Equity Fund - Class AAA
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| C000002916 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Equity Fund - Class C
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| Average Annual Return, Percent |
13.05%
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18.40%
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7.77%
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9.04%
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| C000061064 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Equity Fund - Class I
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| C000002917 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Equity Fund - Class A
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| Average Annual Return, Percent |
(4.31%)
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0.30%
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4.69%
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7.76%
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| C000002928 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Mighty Mites Fund - Class AAA
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| C000002930 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Mighty Mites Fund - Class C
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| Average Annual Return, Percent |
5.82%
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25.43%
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4.18%
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7.68%
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| C000061067 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Mighty Mites Fund - Class I
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| C000002927 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
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TETON Westwood Mighty Mites Fund - Class A
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| Average Annual Return, Percent |
2.93%
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22.24%
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4.11%
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7.93%
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| Without Sales Load [Member] | C000002934 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
18.55%
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42.02%
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9.81%
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13.41%
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| Without Sales Load [Member] | C000002933 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
18.16%
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40.99%
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8.99%
|
12.56%
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| Without Sales Load [Member] | C000061068 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
18.68%
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42.40%
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10.09%
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13.69%
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| Without Sales Load [Member] | C000002931 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
18.57%
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42.10%
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9.81%
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13.28%
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| Without Sales Load [Member] | C000002912 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(0.62%)
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6.46%
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4.74%
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6.34%
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| Without Sales Load [Member] | C000002914 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.00%)
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5.64%
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3.94%
|
5.55%
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| Without Sales Load [Member] | C000061063 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(0.51%)
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6.73%
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5.00%
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6.62%
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| Without Sales Load [Member] | C000002911 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(0.60%)
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6.42%
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4.74%
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6.23%
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| Without Sales Load [Member] | C000002922 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.94%)
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19.67%
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2.10%
|
8.06%
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| Without Sales Load [Member] | C000002921 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(2.22%)
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18.83%
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1.35%
|
7.24%
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| Without Sales Load [Member] | C000061065 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.77%)
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20.01%
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2.35%
|
8.33%
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| Without Sales Load [Member] | C000002919 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.88%)
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19.76%
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2.10%
|
7.93%
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| Without Sales Load [Member] | C000002918 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(0.31%)
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4.59%
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5.56%
|
8.33%
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| Without Sales Load [Member] | C000002916 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
14.05%
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19.40%
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7.77%
|
9.04%
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| Without Sales Load [Member] | C000061064 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(0.19%)
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4.83%
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5.82%
|
8.60%
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| Without Sales Load [Member] | C000002917 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(0.33%)
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4.48%
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5.55%
|
8.20%
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| Without Sales Load [Member] | C000002928 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
7.23%
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27.36%
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4.97%
|
8.50%
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| Without Sales Load [Member] | C000002930 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.82%
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26.43%
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4.18%
|
7.68%
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| Without Sales Load [Member] | C000061067 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
7.35%
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27.74%
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5.23%
|
8.77%
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| Without Sales Load [Member] | C000002927 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
7.22%
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|
27.33%
|
4.96%
|
8.37%
|
| Russell 2000 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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|
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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|
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| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
|
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|
|
| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
|
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| Average Annual Return [Line Items] |
|
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|
|
|
| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
|
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|
|
|
| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| S&P 500 Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(1.79%)
|
|
17.80%
|
12.06%
|
14.16%
|
| Russell 2000 Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
3.10%
|
|
25.72%
|
3.77%
|
9.88%
|
| Russell 2000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
8.37%
|
|
28.09%
|
5.79%
|
9.61%
|
| Russell 2000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
8.37%
|
|
28.09%
|
5.79%
|
9.61%
|
| Russell 2000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
8.37%
|
|
28.09%
|
5.79%
|
9.61%
|
| Russell 2000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
8.37%
|
|
28.09%
|
5.79%
|
9.61%
|
| 60% S&P 500 + 40% Bloomberg Gov't / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(0.80%)
|
|
12.22%
|
7.33%
|
9.21%
|
| Bloomberg US Government / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
0.69%
|
|
3.86%
|
0.24%
|
1.79%
|
| 60% S&P 500 + 40% Bloomberg Gov't / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(0.80%)
|
|
12.22%
|
7.33%
|
9.21%
|
| Bloomberg US Government / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
0.69%
|
|
3.86%
|
0.24%
|
1.79%
|
| 60% S&P 500 + 40% Bloomberg Gov't / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(0.80%)
|
|
12.22%
|
7.33%
|
9.21%
|
| Bloomberg US Government / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
0.69%
|
|
3.86%
|
0.24%
|
1.79%
|
| 60% S&P 500 + 40% Bloomberg Gov't / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(0.80%)
|
|
12.22%
|
7.33%
|
9.21%
|
| Bloomberg US Government / Credit Bond Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
0.69%
|
|
3.86%
|
0.24%
|
1.79%
|
| ICE Bank of America Merrill Lynch U.S. Convertibles Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.77%
|
|
25.04%
|
5.22%
|
11.80%
|
| ICE Bank of America Merrill Lynch U.S. Convertibles Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.77%
|
|
25.04%
|
5.22%
|
11.80%
|
| ICE Bank of America Merrill Lynch U.S. Convertibles Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.77%
|
|
25.04%
|
5.22%
|
11.80%
|
| ICE Bank of America Merrill Lynch U.S. Convertibles Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.77%
|
|
25.04%
|
5.22%
|
11.80%
|
| Russell 1000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.99%
|
|
15.87%
|
9.43%
|
10.58%
|
| Russell 1000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.99%
|
|
15.87%
|
9.43%
|
10.58%
|
| Russell 1000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.99%
|
|
15.87%
|
9.43%
|
10.58%
|
| Russell 1000 Value Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
5.99%
|
|
15.87%
|
9.43%
|
10.58%
|
| Dow Jones U.S. Micro-Cap Total Stock Market Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(1.33%)
|
|
32.48%
|
(2.48%)
|
7.45%
|
| Dow Jones U.S. Micro-Cap Total Stock Market Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(1.33%)
|
|
32.48%
|
(2.48%)
|
7.45%
|
| Dow Jones U.S. Micro-Cap Total Stock Market Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(1.33%)
|
|
32.48%
|
(2.48%)
|
7.45%
|
| Dow Jones U.S. Micro-Cap Total Stock Market Index |
|
|
|
|
|
| Average Annual Return [Line Items] |
|
|
|
|
|
| Average Annual Return, Percent |
(1.33%)
|
|
32.48%
|
(2.48%)
|
7.45%
|