Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Nov. 30, 2012
Other comprehensive income attributable to noncontrolling interests	$ 0	$ 0
Interests of mandatorily redeemable financial instruments	Entitled to a pro rata share of the profits and losses of JHYH and are scheduled to terminate in April 2013, with an option to extend up to three additional one-year periods.
Carrying amount of mandatorily redeemable preferred interest of consolidated subsidiaries	$ 358,951		$ 348,051