Segment Reporting (Schedule of Automotive and Other Segment Reporting) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 483,724,839	$ 453,761,726
Income from operations	133,733,701	105,027,167
Automotive Products
Segment Reporting Information [Line Items]
Revenue	475,617,436	439,855,587
Income from operations	134,668,052	100,775,544
Other
Segment Reporting Information [Line Items]
Revenue	8,107,403	13,906,139
Income from operations	$ (934,351)	$ 4,251,623