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Earnings (Loss) Per Share (Tables) | 9 Months Ended
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Aug. 31, 2014
Earnings Per Share, Basic and Diluted [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | Basic and diluted earnings per share were calculated as follows (in thousands, except per share amounts):
|  | Nine Months Ended August 31, |  | Three Months Ended August 31,
|  | 2014 |  | 2013 |  | 2014 |  | 2013
Numerator: |  |  |  |  |  |  |  |
Net income |  | $ | 65,548 |  |  | $ | 11,847 |  |  | $ | 28,361 |  |  | $ | 27,278 |
Less: Distributed earnings allocated to nonvested restricted stock |  | (18 | ) |  | (18 | ) |  | (6 | ) |  | (6 | )
Less: Undistributed earnings allocated to nonvested restricted stock |  | (159 | ) |  | (16 | ) |  | (73 | ) |  | (73 | )
Numerator for basic earnings per share |  | 65,371 |  |  | 11,813 |  |  | 28,282 |  |  | 27,199 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes |  | 2,000 |  |  | — |  |  | 667 |  |  | 667 |
Add: Undistributed earnings allocated to nonvested restricted stock |  | 159 |  |  | 16 |  |  | 73 |  |  | 73 |
Less: Undistributed earnings reallocated to nonvested restricted stock |  | (142 | ) |  | (14 | ) |  | (66 | ) |  | (65 | )
Numerator for diluted earnings per share |  | $ | 67,388 |  |  | $ | 11,815 |  |  | $ | 28,956 |  |  | $ | 27,874 |
Denominator: |  |  |  |  |  |  |  |
Weighted average shares outstanding — basic |  | 88,389 |  |  | 82,261 |  |  | 91,793 |  |  | 83,714 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Share-based payments |  | 1,823 |  |  | 2,028 |  |  | 1,875 |  |  | 1,931 |
Convertible senior notes |  | 8,402 |  |  | — |  |  | 8,402 |  |  | 8,402 |
Weighted average shares outstanding — diluted |  | 98,614 |  |  | 84,289 |  |  | 102,070 |  |  | 94,047 |
Basic earnings per share |  | $ | .74 |  |  | $ | .14 |  |  | $ | .31 |  |  | $ | .32 |
Diluted earnings per share |  | $ | .68 |  |  | $ | .14 |  |  | $ | .28 |  |  | $ | .30 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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