Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Income Tax Disclosure [Abstract]
Balance, beginning of year	$ 2,631	$ 2,294	$ 3,914
Tax positions related to current year	79	445	442
Settlements with tax authorities	0	0	(1,736)
Tax positions acquired	0	0	200
Lapses due to expiration of the statute of limitations	(518)	(108)	(526)
Balance, end of year	$ 2,192	$ 2,631	$ 2,294