Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands	9 Months Ended
	Aug. 31, 2011	Aug. 31, 2010
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	$ 152,599	$ 109,209
Net cash provided by (used in) investing activities	(92,051)	(86,755)
Net cash used in financing activities	(48,835)	(91,801)
Parent Company
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	(5,441)	(53,624)
Net cash provided by (used in) investing activities	64,220	128,105
Net cash used in financing activities	(47,226)	(88,161)
Combined Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	167,393	144,492
Net cash provided by (used in) investing activities	(169,324)	(191,510)
Net cash used in financing activities	(1,180)	(3,640)
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	14,371	18,525
Net cash provided by (used in) investing activities	(10,671)	(23,534)
Net cash used in financing activities	(429)
Eliminations
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash (used in) provided by operating activities	(23,724)	(184)
Net cash provided by (used in) investing activities	$ 23,724	$ 184