Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 973,310	$ 1,644,568
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	758,173	1,396,582
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	330,553	953,226
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	69,551	87,254
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	358,069	356,102
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	215,137	247,986
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	198,056	559,720
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	218,611	330,358
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	140,563	242,226
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	75,749	97,045
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	125,194	167,233
U.S.
Disaggregation of Revenue [Line Items]
Net sales	868,938	1,539,596
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	668,452	1,309,429
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	314,982	937,635
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	44,004	60,146
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	309,466	311,648
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	200,486	230,167
International
Disaggregation of Revenue [Line Items]
Net sales	104,372	104,972
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	89,721	87,153
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	15,571	15,591
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	25,547	27,108
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	48,603	44,454
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 14,651	$ 17,819