Stockholders' Equity (Narrative) (Details) - shares	3 Months Ended		6 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Equity [Abstract]
Maximum number of shares to repurchase	20,000,000		20,000,000
Repurchases of common stock (in shares)	0	0	0	0
Authorized shares under stock repurchase program	6,200,000		6,200,000