Segment Reporting (Schedule of Net Sales by Product) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information
Total net sales	$ 4,472,697	$ 2,796,166	$ 2,371,482
OEM Segment
Segment Reporting Information
Total net sales	3,643,612	2,167,911	2,091,901
Aftermarket Segment
Segment Reporting Information
Total net sales	829,085	628,255	279,581
Chassis, Chassis Parts and Slide-out Mechanisms | OEM Segment
Segment Reporting Information
Total net sales	1,320,718	815,706	796,434
Windows and Doors | OEM Segment
Segment Reporting Information
Total net sales	1,014,332	620,372	585,464
Furniture and Mattresses | OEM Segment
Segment Reporting Information
Total net sales	701,876	351,107	342,691
Axles and Suspension Solutions | OEM Segment
Segment Reporting Information
Total net sales	248,144	145,989	129,471
Other Products | OEM Segment
Segment Reporting Information
Total net sales	$ 358,542	$ 234,737	$ 237,841