Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Apr. 03, 2020	Dec. 31, 2019	[1]	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 311,216,556			$ 311,216,556			$ 307,365,845
Acquisitions				3,850,711
Amortization of intangible assets	5,600,000		$ 5,600,000	16,800,000	$ 16,800,000
Amortization expense, remainder of fiscal year	22,000,000			22,000,000
Amortization expense, year one	22,000,000			22,000,000
Amortization expense, year two	21,000,000			21,000,000
Amortization expense, year three	19,000,000			19,000,000
Amortization expense, year four	$ 16,000,000			$ 16,000,000
HomeLink®
Finite-Lived Intangible Assets [Line Items]
Goodwill									$ 307,400,000
Vaporsens Inc
Finite-Lived Intangible Assets [Line Items]
Goodwill						$ 3,850,711
Acquisitions		$ 3,900,000

[1] The condensed consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.