Accounting Developments (Details) - USD ($) $ in Thousands |
May 31, 2016 |
Dec. 01, 2015 |
Nov. 30, 2015 |
|---|---|---|---|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Investments in managed funds | $ 183,149 | $ 85,775 | |
| Accrued expenses and other liabilities | 1,066,839 | 1,049,019 | |
| Noncontrolling interests | $ 5,201 | $ 27,468 | |
| Accounting Standards Update, Consolidation [Member] | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Investments in managed funds | $ (27,000) | ||
| Accrued expenses and other liabilities | (700) | ||
| Noncontrolling interests | $ (26,300) |