Goodwill and Other Intangible Assets (Details) (USD $)			3 Months Ended	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 HomeLink® [Member]	Sep. 30, 2013 HomeLink® [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Goodwill	$ 337,670,463	$ 0	$ 337,557,061	$ 337,557,061
Goodwill that is expected to be deductible for tax purposes			337,600,000	337,600,000
Amortization expense			0	0
Amortization expense, remainder of 2013			7,600,000	7,600,000
Amortization expense, 2014			20,800,000	20,800,000
Amortization expense, 2015			20,800,000	20,800,000
Amortization expense, 2016			20,800,000	20,800,000
Amortization expense, 2017			20,800,000	20,800,000
Amortization expense, 2018			$ 20,800,000	$ 20,800,000