NET INCOME PER SHARE - Anti-Dilutive Effect of Shares Not Included in Computation of Diluted Net Income Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings (in shares)	14,333	15,096	14,199	14,900
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings (in shares)	1,419	1,594	1,464	1,741
Stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings (in shares)	1,049	1,637	870	1,294
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings (in shares)	11,865	11,865	11,865	11,865