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Earnings Per Share | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Earnings Per Share | 13 Earnings Per Share 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
For the years ended December 31, 2013, 2012 and 2011, the Company had 1.1 million, 2.0 million and 1.3 million stock options that were antidilutive, respectively, due to having higher exercise prices than the Company's average stock price during the period. These securities were not included in the computation of diluted EPS. The effect of dilutive securities was calculated using the treasury stock method.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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