Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands |
6 Months Ended |
12 Months Ended |
May 31, 2016 |
Nov. 30, 2015 |
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Total gross costs - intangible assets |
$ 269,674
|
$ 270,852
|
| Accumulated amortization - finite lived intangible assets |
(50,908)
|
(45,069)
|
| Disposals - indefinite lived intangible assets |
(1,379)
|
|
| Total net carrying amount - intangible assets |
217,387
|
225,783
|
| Customer Relationships [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross costs - finite lived intangible assets |
127,210
|
127,667
|
| Accumulated amortization - finite lived intangible assets |
(38,787)
|
(34,754)
|
| Net carrying amount - finite lived intangible assets |
$ 88,423
|
$ 92,913
|
| Weighted average remaining lives (years) |
12 years 5 months
|
12 years 10 months 23 days
|
| Trade Name [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross costs - finite lived intangible assets |
$ 130,537
|
$ 131,288
|
| Accumulated amortization - finite lived intangible assets |
(12,121)
|
(10,315)
|
| Net carrying amount - finite lived intangible assets |
$ 118,416
|
$ 120,973
|
| Weighted average remaining lives (years) |
31 years 9 months
|
32 years 3 months 18 days
|
| Exchange and Clearing Organization Membership Interests and Registrations [Member] |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross costs - indefinite lived intangible assets |
$ 11,927
|
$ 11,897
|
| Accumulated amortization - finite lived intangible assets |
|
0
|
| Disposals - indefinite lived intangible assets |
(1,379)
|
|
| Net carrying amount - indefinite lived intangible assets |
$ 10,548
|
$ 11,897
|