Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 968,029	$ 973,310
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	758,311	758,173
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	390,763	330,553
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	68,838	69,551
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	298,710	358,069
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	209,718	215,137
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	212,139	198,056
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	217,622	218,611
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	105,449	140,563
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	85,292	75,749
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	137,809	125,194
U.S.
Disaggregation of Revenue [Line Items]
Net sales	858,326	868,938
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	668,678	668,452
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	380,162	314,982
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	40,004	44,004
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	248,512	309,466
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	189,648	200,486
International
Disaggregation of Revenue [Line Items]
Net sales	109,703	104,372
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	89,633	89,721
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	10,601	15,571
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	28,834	25,547
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	50,198	48,603
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 20,070	$ 14,651