Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Detail) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015
Banking and Thrift [Abstract]
Securities borrowing arrangements, Gross amounts	$ 7,743,562	$ 6,975,136
Securities borrowing arrangements, Netting in consolidated statement of financial condition	0	0
Securities borrowing arrangements, Net amounts in consolidated statement of financial condition	7,743,562	6,975,136
Securities borrowing arrangements, Additional amounts available for setoff	(710,611)	(478,991)
Securities borrowing arrangements, Available collateral	(647,290)	(667,099)
Securities borrowing arrangements, Net amount	6,385,661	5,829,046
Reverse repurchase agreements, Gross amounts	14,083,144	14,048,860
Reverse repurchase agreements, Netting in consolidated statement of financial condition	(10,220,656)	(10,191,554)
Reverse repurchase agreements, Net amounts in consolidated statement of financial condition	3,862,488	3,857,306
Reverse repurchase agreements, Additional amounts available for setoff	(176,275)	(83,452)
Reverse repurchase agreements, Available collateral	(3,591,654)	(3,745,215)
Reverse repurchase agreements, Net amount	94,559	28,639
Securities lending arrangements, Gross amounts	2,819,132	2,979,300
Securities lending arrangements, Netting in consolidated statement of financial condition	0	0
Securities lending arrangements, Net amounts in consolidated statement of financial condition	2,819,132	2,979,300
Securities lending arrangements, Additional amounts available for setoff	(710,611)	(478,991)
Securities lending arrangements, Available collateral	(2,064,299)	(2,464,395)
Securities lending arrangements, Net amount	44,222	35,914
Repurchase agreements, Gross amounts	17,012,332	20,195,982
Repurchase agreements, Netting in consolidated statement of financial condition	(10,220,656)	(10,191,554)
Repurchase agreements, Net amounts in consolidated statement of financial condition	6,791,676	10,004,428
Repurchase agreements, Additional amounts available for setoff	(176,275)	(83,452)
Repurchase agreements, Available collateral	(5,780,909)	(8,103,468)
Repurchase agreements, Net amount	$ 834,492	$ 1,817,508