Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities
Net income	$ 33,538	$ 36,769	$ 24,333
Income from discontinued operations, net of income taxes	0	0	118
Income from continuing operations	33,538	36,769	24,215
Adjustments to reconcile income from continuing operations to net cash provided by (used for) operating activities
Depreciation and amortization	20,885	20,930	23,583
Non-cash stock-based compensation expense	3,196	3,534	1,715
(Gain) loss on disposal of fixed assets	(1,382)	3	0
Gain on sale of notes receivable	0	(11,924)	0
Deferred taxes	2,826	8,732	(922)
Impairment charges	0	0	916
Other	(1,403)	4,225	4,161
Payments on long-term performance based compensation	0	0	(413)
Cash flows provided by (used for) working capital
Accounts receivable	(15,273)	(11,589)	12,479
Inventories	(24,885)	(7,868)	2,222
Prepaid expenses and other current assets	(676)	(969)	(243)
Accounts payable and accrued expenses	28,088	4,664	(20,687)
Net cash provided by (used for) operating activities - continuing operations	44,914	46,507	47,026
Net cash provided by (used for) operating activities - discontinued operations	0	0	7,297
Net cash provided by (used for) operating activities	44,914	46,507	54,323
Cash Flows From Investing Activities
Capital expenditures	(17,867)	(13,421)	(10,294)
Acquisition of business	(35,758)	(63,334)	(18,000)
Proceeds from sale of property, plant and equipment	3,336	2	7,537
Proceeds on sale of notes receivable	0	1,200	0
Net cash provided by (used for) investing activities - continuing operations	(50,289)	(75,553)	(20,757)
Net cash provided by (used for) investing activities - discontinued operations	0	0	0
Net cash provided by (used for) investing activities	(50,289)	(75,553)	(20,757)
Cash Flows From Financing Activities
Net borrowings from revolving credit facility	53,000	0	0
Repayments of long-term debt	(40,000)	0	0
Payments on finance lease	(402)	0	0
Cash dividends paid	(19,596)	(19,425)	(19,316)
Proceeds from issuance of common stock	3,793	1,732	3,336
Shares withheld for employee taxes on equity awards	(888)	(623)	(1,008)
Deferred financing fees	(1,095)	0	0
Net cash provided by (used for) financing activities - continuing operations	(5,188)	(18,316)	(16,988)
Net cash provided by (used for) financing activities - discontinued operations	0	0	0
Net cash provided by (used for) financing activities	(5,188)	(18,316)	(16,988)
Foreign exchange rate effect on cash	(83)	136	55
Net (decrease) increase in cash	(10,646)	(47,226)	16,633
Cash at January 1	28,301	75,527	58,894
Cash at December 31	17,655	28,301	75,527
Supplemental Disclosures of Cash Flow Information
Interest	4,279	4,505	4,657
Income taxes	$ 10,936	$ 5,355	$ 11,437