Inventories (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Inventory, Net [Abstract]
Raw materials and work in progress	$ 750,862,984	$ 612,701,274
Finished goods	42,380,890	7,331,921
Total inventories	$ 793,243,874	$ 620,033,195

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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-Publisher FASB
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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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