Stockholders' Equity (Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017
Share-based Payment Arrangement [Abstract]
Dividend per Share (in dollars per share)	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08	$ 0.08
Total of Cash Dividends Declared	$ 12,724	$ 12,681	$ 12,706	$ 13,226	$ 13,677	$ 13,991	$ 14,272	$ 14,588

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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