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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share Reconciliation [Abstract] |
Earnings Per Share Reconciliation | Basic and diluted EPS calculations are detailed as follows (in th ousands, except per share data):
|  |  |  | Year Ended December 31, 2013
|  |  |  | Net Income |  | Weighted-Average Shares |  | Per Share
|  |  |  | (Numerator) |  | (Denominator) |  | Amount
Net income per basic common share |  | $ | 450,003 |  | 85,426 |  | $ | 5.27
Effect of dilutive stock option, restricted |  |  |  |  |  |  |  |
| stock and restricted stock unit securities |  |  |  |  | 1,120 |  |  |
Net income per diluted common share |  | $ | 450,003 |  | 86,546 |  | $ | 5.20
|  |  |  | Year Ended December 31, 2012
|  |  |  | Net Income |  | Weighted-Average Shares |  | Per Share
|  |  |  | (Numerator) |  | (Denominator) |  | Amount
Net income per basic common share |  | $ | 461,443 |  | 87,841 |  | $ | 5.25
Effect of dilutive stock option, restricted |  |  |  |  |  |  |  |
| stock and restricted stock unit securities |  |  |  |  | 1,138 |  |  |
Net income per diluted common share |  | $ | 461,443 |  | 88,979 |  | $ | 5.19
|  |  |  | Year Ended December 31, 2011
|  |  |  | Net Income |  | Weighted-Average Shares |  | Per Share
|  |  |  | (Numerator) |  | (Denominator) |  | Amount
Net income per basic common share |  | $ | 432,968 |  | 90,833 |  | $ | 4.77
Effect of dilutive stock option, restricted |  |  |  |  |  |  |  |
| stock and restricted stock unit securities |  |  |  |  | 1,492 |  |  |
Net income per diluted common share |  | $ | 432,968 |  | 92,325 |  | $ | 4.69

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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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