Segment Reporting (Schedule of Major Product Line Revenues) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from External Customer [Line Items]
Revenues	$ 443,836,000	$ 477,761,000	$ 468,711,000	$ 468,589,000	$ 453,409,000	$ 460,253,000	$ 454,981,000	$ 465,420,000	$ 1,858,897,406	$ 1,834,063,697	$ 1,794,872,578
Automotive Products
Revenue from External Customer [Line Items]
Revenues									1,810,536,887	1,791,198,296	1,758,127,468
Automotive Products | Automotive Mirrors
Revenue from External Customer [Line Items]
Revenues									1,638,600,272	1,598,589,777	1,573,222,820
Automotive Products | HomeLink Modules
Revenue from External Customer [Line Items]
Revenues									171,936,615	192,608,519	184,904,648
Other
Revenue from External Customer [Line Items]
Revenues									48,360,519	42,865,401
Other | Other Products Revenue
Revenue from External Customer [Line Items]
Revenues									$ 48,360,519	$ 42,865,401	$ 36,745,110