Cash Dividends Declared to Common Stockholders (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Feb. 28, 2014	Nov. 30, 2013	Feb. 28, 2013	Nov. 30, 2012
Earnings Per Share [Abstract]
Dividend Declaration Date	Jan. 22, 2014	Oct. 17, 2013	Jan. 23, 2013	Oct. 16, 2012
Dividend per Share	$ 0.08	$ 0.08	$ 0.08	$ 0.08
Total of Cash Dividends Declared	$ 16,976	$ 17,221	$ 16,990	$ 16,962
Date of Record for Dividend Payment	Feb. 14, 2014	Nov. 15, 2013	Feb. 15, 2013	Nov. 15, 2012
Dividend Cash Payment Date	Mar. 03, 2014	Dec. 02, 2013	Mar. 01, 2013	Dec. 03, 2012