Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 460,253,433	$ 438,627,786	$ 1,380,654,978	$ 1,335,302,109
Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	449,184,447		1,348,395,245
Other Segment
Disaggregation of Revenue [Line Items]
Revenue	11,068,986		32,259,733
Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	449,184,447		1,348,395,245
Automotive Mirrors & Electronics | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	399,732,577		$ 1,200,521,589
Automotive Mirrors & Electronics | Automotive Segment | Minimum
Disaggregation of Revenue [Line Items]
Payment terms			15 days
Automotive Mirrors & Electronics | Automotive Segment | Maximum
Disaggregation of Revenue [Line Items]
Payment terms			90 days
HomeLink Modules | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	49,451,870		$ 147,873,656
Fire Protection Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	5,918,085		$ 17,010,954
Fire Protection Products | Other Segment | Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Fire Protection Products | Other Segment | Maximum
Disaggregation of Revenue [Line Items]
Payment terms			75 days
Windows Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	5,150,901		$ 15,248,779
Dimmable Aircraft Windows | Other Segment | Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Dimmable Aircraft Windows | Other Segment | Maximum
Disaggregation of Revenue [Line Items]
Payment terms			45 days
U.S. | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	151,229,829		$ 434,439,455
U.S. | Other Products
Disaggregation of Revenue [Line Items]
Revenue	11,068,986		32,259,733
Germany | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	81,621,623		259,057,369
Japan | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	55,363,644		153,843,723
Other | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	$ 160,969,351		$ 501,054,698