AVAILABLE-FOR-SALE SECURITIES (as restated) (Details 6) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Debt Securities, Available-for-sale [Line Items]
Less than one year	$ 0	$ 0
Greater than one year and less than five years	399,872,894	211,800,340
Greater than or equal to five years	471,056,707	359,666,241
Total	$ 870,929,601	$ 571,466,581

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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