Earnings Per Share The following table sets forth the components used in the computation of basic and diluted earnings per share (in thousands, except share and per share amounts): | | | | | | | | | | | | | | Year Ended December 31, | | 2018 | | 2017 | | 2016 | Numerator: | |
| | |
| | |
| Income available to common stockholders | $ | 269,911 |
| | $ | 187,191 |
| | $ | 195,171 |
| Denominator: | |
| | |
| | |
| Basic weighted-average shares outstanding | 148,183,431 |
| | 154,134,411 |
| | 160,859,782 |
| Effect of dilutive shares: | | | | | | Stock options and unvested restricted stock units | 821,259 |
| | 950,955 |
| | 521,717 |
| Diluted weighted-average shares outstanding | 149,004,690 |
| | 155,085,366 |
| | 161,381,499 |
| Earnings per share | |
| | |
| | |
| Basic | $ | 1.82 |
| | $ | 1.21 |
| | $ | 1.21 |
| Diluted | $ | 1.81 |
| | $ | 1.21 |
| | $ | 1.21 |
| Antidilutive stock options not included in diluted earnings per share | 1,645,816 |
| | 3,288,340 |
| | 4,551,337 |
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