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Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Statement of Comprehensive Income [Abstract] |  |  |  |
Net Income | $ 109,023,982 | $ 88,535,947 | $ 220,272,725 | $ 186,092,688
Other comprehensive income (loss) before tax: |  |  |  |
Foreign currency translation adjustments | (2,465,603) | 1,495,210 | (839,425) | 1,683,800
Unrealized gains on derivatives | 15,556 | 494,885 | 82,604 | 1,136,860
Unrealized gains (losses) on debt securities, net | (302,252) | 952,365 | (323,532) | 3,122,619
Other comprehensive income, before tax | (2,752,299) | 2,942,460 | (1,080,353) | 5,943,279
Expense (Benefit) for income taxes related to components of other comprehensive income | (60,206) | 506,538 | (50,594) | 1,490,818
Other comprehensive income, net of tax | (2,692,093) | 2,435,922 | (1,029,759) | 4,452,461
Comprehensive Income | $ 106,331,889 | $ 90,971,869 | $ 219,242,966 | $ 190,545,149

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