Earnings Per Share and Dividends (Dividends) (Details 3) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2013
Earnings Per Share and Dividends [Abstract]
Dividend Declaration Date	Apr. 15, 2015	Jan. 21, 2015	Oct. 16, 2014	Apr. 17, 2014	Jan. 22, 2014	Oct. 17, 2013
Dividend per Share	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08
Total of Cash Dividends Declared	$ 15,988	$ 16,020	$ 15,973	$ 16,686	$ 16,976	$ 17,221
Date of Record for Dividend Payment	May 15, 2015	Feb. 13, 2015	Nov. 14, 2014	May 15, 2014	Feb. 14, 2014	Nov. 15, 2013
Dividend Cash Payment Date	Jun. 01, 2015	Mar. 02, 2015	Dec. 01, 2014	Jun. 02, 2014	Mar. 03, 2014	Dec. 02, 2013