Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 1,045,590	$ 968,029
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	823,555	758,311
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	471,194	390,763
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	59,608	68,838
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	292,753	298,710
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	222,035	209,718
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	242,920	212,139
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	229,521	217,622
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	113,180	105,449
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	88,610	85,292
Appliances | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	77,650	69,657
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	71,674	68,152
U.S.
Disaggregation of Revenue [Line Items]
Net sales	947,796	858,326
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	748,073	668,678
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	466,353	380,162
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	36,189	40,004
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	245,531	248,512
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	199,723	189,648
International
Disaggregation of Revenue [Line Items]
Net sales	97,794	109,703
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	75,482	89,633
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	4,841	10,601
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	23,419	28,834
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	47,222	50,198
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 22,312	$ 20,070