Accrued Expenses And Other Current Liabilities (Schedule of Reconciliation of the Activity Related to Accrued Warranty) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease)
Balance at beginning of period	$ 46,530	$ 38,502	$ 32,393
Provision for warranty expense	30,520	31,819	25,399
Warranty liability from acquired businesses	287	760	150
Warranty costs paid	(30,170)	(24,551)	(19,440)
Balance at end of period	47,167	46,530	38,502
Less long-term portion	17,269	14,350	15,447
Current portion of accrued warranty	$ 29,898	$ 32,180	$ 23,055