Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 1,107,250	$ 1,054,544	$ 2,152,840	$ 2,022,573
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	839,559	796,124	1,663,114	1,554,436
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	441,926	426,349	913,120	817,112
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	61,372	63,620	120,980	132,458
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	336,261	306,155	629,014	604,866
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	267,691	258,420	489,726	468,137
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	230,542	229,934	473,462	442,073
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	225,251	228,957	454,772	446,579
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	130,909	110,720	244,089	216,169
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	93,918	89,277	182,528	174,569
Appliances | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	87,441	70,958	165,091	140,616
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	71,498	66,278	143,172	134,430
U.S.
Disaggregation of Revenue [Line Items]
Net sales	1,002,960	941,887	1,950,756	1,800,214
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	759,668	706,614	1,507,741	1,375,293
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	437,205	418,947	903,558	799,109
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	36,514	32,889	72,703	72,893
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	285,949	254,778	531,480	503,291
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	243,292	235,273	443,015	424,921
International
Disaggregation of Revenue [Line Items]
Net sales	104,290	112,657	202,084	222,359
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	79,891	89,510	155,373	179,143
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	4,721	7,402	9,562	18,003
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	24,858	30,731	48,277	59,565
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	50,312	51,377	97,534	101,575
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 24,399	$ 23,147	$ 46,711	$ 43,216