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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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Stockholders' Equity (Narratives) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 20, 2020	Feb. 01, 2019	Jul. 17, 2014
Debt Instrument [Line Items]
Cash dividends declared per common share (in dollars per share)	$ 0.090	$ 0.025
Payment, Tax Withholding, Share-based Payment Arrangement	$ 6,219	$ 3,342
Dividend paid in each quarter (in dollars per share)	$ 0.090	$ 0.025
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)	2,193,947
Shares Withheld to Pay Taxes [Member]
Debt Instrument [Line Items]
Common stock repurchased (in shares)	155,307
Payment, Tax Withholding, Share-based Payment Arrangement	$ 6,200
PSU 2014 [Domain] \| Performance Shares [Member]
Debt Instrument [Line Items]
Common Stock, Shares, Issued (in shares)			313,246
Director Plan SARs [Domain]
Debt Instrument [Line Items]
Number of common stock, authorized, approved under a board approved stock repurchase program (in shares)					680,000
2014 Equity Incentive Plan [Domain]
Debt Instrument [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	680,000
Convertible Notes Payable [Member] \| 1.375% Convertible senior notes due February 1, 2019 [Member]
Debt Instrument [Line Items]
Senior notes, rate				1.375%