Acquisitions, Goodwill and Intangible Assets 1 (Details) - USD ($)
$ in Thousands |
12 Months Ended |
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|
Oct. 31, 2016 |
Oct. 31, 2015 |
Oct. 31, 2014 |
Oct. 31, 2017 |
Oct. 31, 2013 |
| Business Acquisition Contingent Consideration [Line Items] |
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| Goodwill acquired |
$ 10,130
|
$ 9,085
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|
| Atlanta Capital [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Non-controlling interest holders total (direct and indirect) profits interest, end of period |
13.00%
|
13.10%
|
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|
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| Profit interest granted to non-controlling interest holders under the Long-term Equity Incentive Plan |
1.40%
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| Non-controlling interest holders capital interest percentage that may be sold to the Company |
0.10%
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| Non-controlling interest holders right to profits, expressed as a percentage |
0.50%
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| Additional interest that may be purchased by the Company in future periods |
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|
100.00%
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|
| Atlanta Capital [Member] | Put Option [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Company's increase in profit interest percentage under acquisition agreement, during the period |
0.02%
|
1.40%
|
|
|
|
| Company's increase in indirect profit interest percentage under Long-term Equity Incentive Plan, during the period |
0.90%
|
0.40%
|
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| Purchase of non-controlling interests |
$ 100
|
$ 6,800
|
|
|
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| Amount paid for indirect profit interest pursuant to the put and call provisions of the Long-term Equity Incentive Plan |
$ 1,900
|
$ 500
|
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| Parametric Portfolio Associates [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Non-controlling interest holders capital ownership percentage, end of period |
1.80%
|
2.20%
|
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| Non-controlling interest holders total (direct and indirect) profits interest, end of period |
7.00%
|
7.40%
|
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| Profit interest granted to non-controlling interest holders under the Long-term Equity Incentive Plan |
0.50%
|
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| Parametric Portfolio Associates [Member] | Put Option [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Company's increase in capital interest percentage under acquisition agreement, during the period |
0.50%
|
0.50%
|
|
|
|
| Company's increase in profit interest percentage under acquisition agreement, during the period |
0.50%
|
0.50%
|
|
|
|
| Profit interest granted to non-controlling interest holders under the Long-term Equity Incentive Plan |
0.10%
|
0.50%
|
|
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| Purchase of non-controlling interests |
$ 6,200
|
$ 6,700
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| Amount paid for indirect profit interest pursuant to the put and call provisions of the Long-term Equity Incentive Plan |
600
|
$ 4,200
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| Tax Advantaged Bond Strategies [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Goodwill acquired |
$ 10,100
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| Parametric Risk Advisors [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Company's increase in capital interest percentage under acquisition agreement, during the period |
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|
20.00%
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| Noncontrolling indirect profit interest acquired during the exchange by Parametric and issued to employees |
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|
0.80%
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| Noncontrolling indirect capital interest acquired during the exchange by Parametric and issued to employees |
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|
0.80%
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| Clifton Group [Member] |
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| Business Acquisition Contingent Consideration [Line Items] |
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| Noncontrolling indirect profit interest acquired during the exchange by Parametric and issued to employees |
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1.90%
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| Noncontrolling indirect capital interest acquired during the exchange by Parametric and issued to employees |
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1.90%
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