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Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Feb. 28, 2018 | Feb. 28, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | $ 1,926,311 |
Net loss | (71,255) | $ 14,259
Dividends on common stock | $ (2,322) |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) | 268,954 |
Stock Issued During Period, Value, Stock Options Exercised | $ 2,946 |
Stock Issued During Period, Value, Share-based Compensation, Gross | 0 |
Stock-based compensation | 3,829 |
Stock repurchases | (6,787) |
Ending balance | $ 1,852,722 |
Common Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Common Stock, Shares, Outstanding (in shares) | (117,946,000) |
Beginning balance | $ 117,946 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) | 268,000 |
Stock Issued During Period, Value, Stock Options Exercised | $ 268 |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in shares) | 0 |
Stock Issued During Period, Value, Share-based Compensation, Gross | $ 0 |
Common Stock, Shares, Outstanding (in shares) | (118,214,000) |
Ending balance | $ 118,214 |
Paid-in Capital |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 727,483 |
Stock Issued During Period, Value, Stock Options Exercised | 2,678 |
Stock Issued During Period, Value, Share-based Compensation, Gross | (4,551) |
Stock-based compensation | 3,829 |
Ending balance | 729,439 |
Retained Earnings |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 1,735,695 |
Net loss | (71,255) |
Dividends on common stock | (2,322) |
Ending balance | 1,662,118 |
Accumulated Other Comprehensive Income |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (16,924) |
Ending balance | $ (16,924) |
Grantor Stock Ownership Trust |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Common Stock, Shares, Outstanding (in shares) | (8,898,000) |
Beginning balance | $ (96,509) |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in shares) | (438,000) |
Stock Issued During Period, Value, Share-based Compensation, Gross | $ 4,749 |
Common Stock, Shares, Outstanding (in shares) | (8,460,000) |
Ending balance | $ (91,760) |
Treasury Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Common Stock, Shares, Outstanding (in shares) | (22,021,000) |
Beginning balance | $ (541,380) |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in shares) | (10,000) |
Stock Issued During Period, Value, Share-based Compensation, Gross | $ (198) |
Stock repurchases | $ (6,787) |
Treasury Stock, Shares, Acquired (in shares) | (217,000) |
Common Stock, Shares, Outstanding (in shares) | (22,248,000) |
Ending balance | $ (548,365) |

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