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Earnings Per Share | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share A reconciliation between basic and diluted earnings per share is as follows (in thousands, except per share data):
| Quarter Ended June 30, |  | Six Months Ended June 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Net income for basic and diluted earnings per share | $ | 229,905 |  |  | $ | 184,967 |  |  | $ | 329,045 |  |  | $ | 230,197 |
Weighted-average common shares outstanding | 215,265 |  |  | 219,913 |  |  | 216,089 |  |  | 219,770 |
Dilutive effect of stock options, performance share awards and restricted stock awards | 866 |  |  | 989 |  |  | 951 |  |  | 1,116 |
Diluted weighted-average shares outstanding | 216,131 |  |  | 220,902 |  |  | 217,040 |  |  | 220,886 |
Basic earnings per share | $ | 1.07 |  |  | $ | 0.84 |  |  | $ | 1.52 |  |  | $ | 1.05 |
Diluted earnings per share | $ | 1.06 |  |  | $ | 0.84 |  |  | $ | 1.52 |  |  | $ | 1.04 |
There were no antidilutive shares for the quarters and six month periods ended June 30, 2016 and June 30, 2015, respectively.

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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 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: 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 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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