Accrued Liabilities and Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities
Warranty	$ 13,769	$ 13,522
Due to representatives	7,995	8,296
Payroll	8,423	8,155
Profit sharing	1,489	2,902
Workers' compensation	308	594
Medical self-insurance	1,943	1,546
Customer prepayments	5,931	5,067
Donations, short-term	438	570
Employee vacation time	$ 4,362	$ 3,321
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total	Total
Operating lease liability, short-term	$ 1,580	$ 202
Other	3,968	2,411
Total	$ 50,206	$ 46,586
Other Long-Term Liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities	Other long-term liabilities
Long-term operating lease obligation	$ 15,467	$ 1,369
Long-term donations	334	496
Extended warranties	3,042	2,558
Other long-term liabilities	$ 18,843	$ 4,423