Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 453,761,726	$ 468,588,997
Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	439,855,587	455,798,643
Other Segment
Disaggregation of Revenue [Line Items]
Revenue	13,906,139	12,790,354
Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	439,855,587	455,798,643
Automotive Mirrors & Electronics | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	401,085,314	408,971,666
HomeLink Modules | Automotive Segment
Disaggregation of Revenue [Line Items]
Revenue	38,770,273	46,826,977
Fire Protection Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	6,168,751	5,852,232
Windows Products | Other Segment
Disaggregation of Revenue [Line Items]
Revenue	7,737,388	6,938,122
U.S. | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	135,581,918	141,383,064
U.S. | Other Products
Disaggregation of Revenue [Line Items]
Revenue	13,906,139	12,790,354
Germany | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	72,785,724	78,449,927
Japan | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	51,136,933	56,333,694
Mexico | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	45,950,481	44,410,388
Other | Automotive Products
Disaggregation of Revenue [Line Items]
Revenue	$ 134,400,531	$ 135,221,570