Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
State tax	$ 1,490	$ 1,076
Workers’ compensation	892	883
Health claims	1,351	1,207
Vacation liability	376	374
Allowance for doubtful accounts	344	384
Inventories	7,497	6,108
Sales incentive and advertising allowances	1,777	1,086
Lease obligations	11,562	11,631
Stock-based compensation	2,612	2,148
Unrealized foreign exchange gain or loss	378	344
Foreign tax credit carryforwards	4,983	4,744
Uncertain tax positions’ unrecognized tax benefits	72	77
Non-United States tax loss carry forward	7,824	7,717
Other	940	0
Deferred tax assets, gross	42,098	37,779
Deferred Tax Assets, Valuation Allowance	11,992	11,316
Deferred tax assets, net, noncurrent	30,106	26,463
Deferred tax liabilities
Depreciation	(14,999)	(12,933)
Goodwill and other intangibles amortization	(16,682)	(15,642)
Tax effect on cumulative translation adjustment	(504)	(568)
Deferred tax liabilities	(43,638)	(40,879)
Total Deferred tax asset/(liability)	(13,532)	(14,416)
Operating loss carryforwards
Deferred tax assets, net, noncurrent	30,106	26,463
Pre-tax loss carryforwards	41,400
Deferred Tax Liabilities, Right Of Use Assets	(11,453)	(11,489)
Deferred Tax Liabilities, Other	$ 0	$ (247)