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Earnings Per Share | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share is calculated by dividing net income available to common stockholders by the weighted-average number of common shares outstanding. Diluted earnings per share is calculated by dividing net income available to common stockholders that has been adjusted for dilutive securities, by the weighted-average number of common shares outstanding including dilutive securities. The following is a reconciliation of the calculation of basic and diluted earnings per share (in thousands, except share and per share data):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Numerator: |  |  |  |  |  |  |
Net income | $ | 24,822 |  |  | $ | 51,916 |  |  | $ | 35,464 |  |  | $ | 55,953 |
Denominator: |  |  |  |  |  |  |
Weighted-average number of common shares outstanding—basic | 200,830,064 |  |  | 195,776,924 |  |  | 200,738,301 |  |  | 195,700,864 |
Effect of dilutive securities: |  |  |  |  |  |  |
Unvested restricted common stock | 80,538 |  |  | 134,737 |  |  | 143,882 |  |  | 181,803 |
Unexercised stock appreciation rights | 1,425 |  |  | — |  |  | 2,212 |  |  | — |
Shares related to unvested PSUs | 230,720 |  |  | 335,057 |  |  | 230,720 |  |  | 335,057 |
Weighted-average number of common shares outstanding—diluted | 201,142,747 |  |  | 196,246,718 |  |  | 201,115,115 |  |  | 196,217,724 |
Earnings per share: |  |  |  |  |  |  |  |  |  |
Basic earnings per share | $ | 0.12 |  |  | $ | 0.27 |  |  | $ | 0.18 |  |  | $ | 0.29 |
Diluted earnings per share | $ | 0.12 |  |  | $ | 0.26 |  |  | $ | 0.18 |  |  | $ | 0.29 |
We did not include unexercised stock appreciation rights of 262,461 in our calculation of diluted earnings per share for the three and six months ended June 30, 2014 as they would be anti-dilutive.

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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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