Earnings Per Share and Stock Repurchase Activity (Details 3) (USD $)	6 Months Ended
May 31, 2014
Earnings Per Share and Stock Repurchase Activity [Abstract]
Stock repurchase program, remaining authorized repurchase amount	$ 241,282,000
Stock repurchase program, authorized amount	$ 250,000,000

Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration