v3.26.1
Segment Reporting (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Net sales $ 1,090,517 $ 1,045,590
OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 852,814 823,555
Travel trailers and fifth-wheels    
Disaggregation of Revenue [Line Items]    
Net sales 442,006 471,194
Motorhomes    
Disaggregation of Revenue [Line Items]    
Net sales 67,838 59,608
Adjacent industries OEMs    
Disaggregation of Revenue [Line Items]    
Net sales 342,970 292,753
Aftermarket Segment    
Disaggregation of Revenue [Line Items]    
Net sales 237,703 222,035
Chassis, chassis parts and slide-out mechanisms | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 237,961 242,920
Windows and doors | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 235,559 229,521
Furniture and mattresses | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 136,757 113,180
Axles and suspension solutions | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 83,916 88,610
Appliances | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 79,407 77,650
Other | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 79,214 71,674
U.S.    
Disaggregation of Revenue [Line Items]    
Net sales 986,807 947,796
U.S. | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 771,375 748,073
U.S. | Travel trailers and fifth-wheels    
Disaggregation of Revenue [Line Items]    
Net sales 437,335 466,353
U.S. | Motorhomes    
Disaggregation of Revenue [Line Items]    
Net sales 40,769 36,189
U.S. | Adjacent industries OEMs    
Disaggregation of Revenue [Line Items]    
Net sales 293,271 245,531
U.S. | Aftermarket Segment    
Disaggregation of Revenue [Line Items]    
Net sales 215,432 199,723
Non-US    
Disaggregation of Revenue [Line Items]    
Net sales 103,710 97,794
Non-US | OEM Segment    
Disaggregation of Revenue [Line Items]    
Net sales 81,439 75,482
Non-US | Travel trailers and fifth-wheels    
Disaggregation of Revenue [Line Items]    
Net sales 4,671 4,841
Non-US | Motorhomes    
Disaggregation of Revenue [Line Items]    
Net sales 27,069 23,419
Non-US | Adjacent industries OEMs    
Disaggregation of Revenue [Line Items]    
Net sales 49,699 47,222
Non-US | Aftermarket Segment    
Disaggregation of Revenue [Line Items]    
Net sales $ 22,271 $ 22,312