Accounts Receivable and Allowances for Doubtful Accounts, Returns and Discounts (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2012	Nov. 30, 2011
Accounts Receivable And Allowances For Doubtful Accounts, Returns And Discounts [Abstract]
Unbilled fees for professional services	$ 19,420	$ 19,499

The amount due for services rendered or products shipped, but not yet billed, recognized in conformity with revenue recognition criteria. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions.

No definition available.

Name:	us-gaap_UnbilledReceivablesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant