Accounting Developments (Details) - USD ($) $ in Thousands	Aug. 31, 2016	Dec. 01, 2015	Nov. 30, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investments in managed funds	$ 191,692		$ 85,775
Accrued expenses and other liabilities	1,030,425		1,049,019
Noncontrolling interests	$ 5,190		$ 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)