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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2019
EARNINGS PER SHARE |
Reconciliation of Basic and Diluted Earnings Per Share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​
​ | ​ | September 30, 2019 | ​ | September 30, 2018 |
​ | ​ | Diluted | ​ | Basic | ​ | Diluted | ​ | Basic | ​
Consolidated operations | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income available to common stockholders | ​ | $ | 56,750 | ​ | $ | 56,750 | ​ | $ | 38,996 | ​ | $ | 38,996 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average equivalent shares | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Shares of common stock | ​ |  | 64,010 | ​ |  | 64,010 | ​ |  | 62,378 | ​ |  | 62,378 | ​
Effect of dilutive stock-based compensation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Stock options | ​ |  | 2,367 | ​ |  | — | ​ |  | 2,659 | ​ |  | — | ​
Restricted stock | ​ |  | 325 | ​ |  | — | ​ |  | 92 | ​ |  | — | ​
Total average equivalent shares | ​ |  | 66,702 | ​ | ​ | 64,010 | ​ | ​ | 65,129 | ​ | ​ | 62,378 | ​
Net income per share | ​ | $ | 0.85 | ​ | $ | 0.89 | ​ | $ | 0.60 | ​ | $ | 0.63 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended | ​
​ | ​ | September 30, 2019 | ​ | September 30, 2018 | ​
​ | ​ | Diluted | ​ | Basic | ​ | Diluted | ​ | Basic |
Consolidated operations | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income available to common stockholders | ​ | $ | 193,669 | ​ | $ | 193,669 | ​ | $ | 154,071 | ​ | $ | 154,071 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average equivalent shares | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Shares of common stock | ​ |  | 63,485 | ​ |  | 63,485 | ​ |  | 62,304 | ​ |  | 62,304 | ​
Effect of dilutive stock-based compensation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Stock options | ​ |  | 2,425 | ​ |  | — | ​ |  | 2,440 | ​ |  | — | ​
Restricted stock | ​ |  | 253 | ​ |  | — | ​ |  | 78 | ​ |  | — | ​
Total average equivalent shares | ​ |  | 66,163 | ​ | ​ | 63,485 | ​ | ​ | 64,822 | ​ | ​ | 62,304 | ​
Net income per share | ​ | $ | 2.93 | ​ | $ | 3.05 | ​ | $ | 2.38 | ​ | $ | 2.47 | ​

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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://fasb.org/us-gaap/role/ref/legacyRef -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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