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Comprehensive Income Statement - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Comprehensive Income Statement |  |  |  |
Net earnings | $ 3,238,217 | $ 2,485,864 | $ 20,164,140 | $ 4,345,864
Other comprehensive income: |  |  |  |
Unrealized gains (losses) on equity securities |  | (67,708) |  | (37,838)
Unrealized gains on derivative instruments |  | 1,021 |  | 2,616
Foreign currency translation adjustments | (1,929) |  | (1,929) |
Other comprehensive income, before income tax | (1,929) | (66,687) | (1,929) | (35,222)
Income tax expense | 481 | 22,786 | 481 | 12,613
Other comprehensive income, net of income tax | (1,448) | (43,901) | (1,448) | (22,609)
Comprehensive income | $ 3,236,769 | $ 2,441,963 | $ 20,162,692 | $ 4,323,255

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580 + Details
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