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Earnings Per Share | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Share | 6. EARNINGS PER SHARE Basic EPS computations are calculated utilizing the weighted average number of shares of common stock outstanding during the periods presented. Diluted EPS is calculated utilizing the weighted average number of shares of common stock outstanding adjusted for the effect of dilutive common stock equivalents. The following table sets forth the computation of basic and diluted EPS for the years ended December 31, 2019, 2018 and 2017 (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2019 | ​ | 2018 | ​ | 2017
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 77,916 | ​ | $ | 55,789 | ​ | $ | 27,721
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average shares of common stock outstanding | ​ | ​ | 11,771 | ​ | ​ | 11,947 | ​ | ​ | 11,924
Effect of dilutive common stock equivalents | ​ | ​ | 346 | ​ | ​ | 132 | ​ | ​ | 164
Weighted average shares of common stock outstanding | ​ | ​ | 12,117 | ​ | ​ | 12,079 | ​ | ​ | 12,088
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share - basic | ​ | $ | 6.62 | ​ | $ | 4.67 | ​ | $ | 2.32
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share - diluted | ​ | $ | 6.43 | ​ | $ | 4.62 | ​ | $ | 2.29
​ The calculation of diluted earnings per share excluded 984, 298, and 3,125 antidilutive options outstanding for the years ended December 31, 2019, 2018 and 2017, respectively. The calculation of diluted earnings per share for the years ended December 31, 2019, 2018 and 2017 also excluded 718, 258 and 0 antidilutive restricted stock awards, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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