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Comparative Quarterly Financial Information (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Oct. 31, 2012
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Jul. 31, 2012
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Apr. 30, 2012
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Jan. 31, 2012
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Oct. 31, 2011
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Jul. 31, 2011
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Apr. 30, 2011
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Jan. 31, 2011
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Oct. 31, 2012
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Oct. 31, 2011
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Oct. 31, 2010
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| Quarterly Financial Data [Abstract] | |||||||||||
| Total revenue | $ 309,889 | $ 298,771 | $ 304,770 | $ 295,606 | $ 297,323 | $ 327,056 | $ 315,613 | $ 308,614 | $ 1,209,036 | $ 1,248,606 | $ 1,115,960 |
| Operating income | 106,345 | 95,016 | 98,811 | 92,820 | 104,648 | 115,427 | 106,812 | 99,345 | 392,992 | 426,232 | 347,581 |
| Net income attributable to Eaton Vance Corp. shareholders | 53,118 | 50,206 | 52,870 | 47,271 | 46,820 | 68,068 | 62,479 | 37,535 | 203,465 | 214,902 | 174,298 |
| Earnings per Share: | |||||||||||
| Basic | $ 0.46 | $ 0.44 | $ 0.46 | $ 0.41 | $ 0.41 | $ 0.58 | $ 0.53 | $ 0.31 | $ 1.76 | $ 1.82 | $ 1.47 |
| Diluted | $ 0.45 | $ 0.43 | $ 0.44 | $ 0.40 | $ 0.40 | $ 0.55 | $ 0.50 | $ 0.30 | $ 1.72 | $ 1.75 | $ 1.40 |
| Dividend income and net investment gains reclassifications | $ 2,700 | $ (11,425) | $ (5,701) | ||||||||