Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 915,497	$ 959,315	$ 2,938,070	$ 2,947,264
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	684,461	728,467	2,238,897	2,245,648
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	369,212	363,573	1,186,324	1,032,866
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	52,800	65,669	185,258	206,404
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	262,449	299,225	867,315	1,006,378
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	231,036	230,848	699,173	701,616
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	196,175	202,429	638,248	603,221
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	203,735	214,135	650,314	652,840
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	98,072	104,266	314,241	370,175
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	68,750	82,083	243,319	246,466
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	117,729	125,554	392,775	372,946
U.S.
Disaggregation of Revenue [Line Items]
Net sales	825,185	860,030	2,625,398	2,629,737
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	613,695	647,383	1,988,988	1,981,703
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	363,746	352,774	1,162,855	994,581
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	30,749	40,254	103,642	124,946
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	219,200	254,355	722,491	862,176
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	211,490	212,647	636,410	648,034
International
Disaggregation of Revenue [Line Items]
Net sales	90,312	99,285	312,672	317,527
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	70,766	81,084	249,909	263,945
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	5,466	10,799	23,469	38,285
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	22,051	25,415	81,616	81,458
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	43,249	44,870	144,824	144,202
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 19,546	$ 18,201	$ 62,763	$ 53,582