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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Summary of Numerator and Denominators Used in Computation of Earnings Per Share | A summary of the numerator and denominators used in the computation of earnings per share follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Numerator: |  |  |  |  |  |  |
Net income (loss) | $ | 11,915 |  |  | $ | 1,704 |  |  | $ | 10,201 |  |  | $ | (2,206 | )
Denominators: |  |  |  |  |  |  |
Number of shares outstanding, end of period: |  |  |  |  |  |  |
Class A common stock | 46,599 |  |  | 41,765 |  |  | 46,599 |  |  | 41,765 |
Class B common stock | 988 |  |  | 988 |  |  | 988 |  |  | 988 |
Shares to be issued - acquisition | 36 |  |  | — |  |  | 36 |  |  | — |
Unvested restricted stock | (9 | ) |  | (38 | ) |  | (9 | ) |  | (38 | )
Effect of weighted average shares outstanding | (150 | ) |  | (54 | ) |  | (921 | ) |  | (199 | )
Basic weighted average common shares outstanding | 47,464 |  |  | 42,661 |  |  | 46,693 |  |  | 42,516 |
Impact of potentially dilutive securities: |  |  |  |  |  |  |
Dilutive effect of stock options and other stock awards | 757 |  |  | 1,255 |  |  | 731 |  |  | — |
Diluted weighted average common shares outstanding | 48,221 |  |  | 43,916 |  |  | 47,424 |  |  | 42,516 |
Anti-dilutive potentially issuable shares | — |  |  | — |  |  | 154 |  |  | 2,105 |

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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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