Aggregate number of common shares reserved for future issuance.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The cash outflow to reacquire common stock during the period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Stockholders' Equity (Narratives) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Feb. 15, 2017	Feb. 28, 2017	Feb. 29, 2016	Nov. 30, 2016
Debt Instrument [Line Items]
Common stock reserve (in shares)		12,602,735
Stock repurchases		$ 2,543	$ 87,526
Dividend paid in each quarter (in dollars per share)		$ 0.0250	$ 0.0250
Cash dividends declared per common share (in dollars per share)		$ 0.0250	$ 0.0250
January 2016 Stock Repurchase Program [Member]
Debt Instrument [Line Items]
Number of common stock, authorized, approved under a board approved stock repurchase program (in shares)		1,627,000
Shares Withheld to Pay Taxes [Member]
Debt Instrument [Line Items]
Stock repurchases		$ 2,543
Treasury Stock, Shares, Acquired (in shares)		152,569
PSU 2013 [Domain] \| Performance Shares [Member]
Debt Instrument [Line Items]
Common Stock, Shares, Issued (in shares)	278,460
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	125,460
Convertible Notes Payable [Member] \| Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member]
Debt Instrument [Line Items]
Senior notes, rate		1.375%		1.375%