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:
Income (loss) from continuing operations	$ 20,219	$ (97,073)	$ 94,284
Income (loss) from discontinued operations, net of income tax	0	(424)	7,833
Net income (loss)	20,219	(97,497)	102,117
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation	19,093	7,394	20,879
Depreciation and amortization	18,516	20,867	22,605
Impairments, inventory write-down and other charges	0	132,579	0
Changes in value of life insurance policies	(2,672)	(894)	(2,899)
Deferred income taxes	6,012	(12,216)	(36,345)
Realization of pension obligation	(234)	188	(112)
Net provision for credit losses	(256)	1,618	754
Gain on sale of business	(1,012)	0	(1,154)
(Gain) loss on sale of discontinued operations	0	573	(8,411)
Other non-cash items	(2,524)	(683)	(200)
Changes in assets and liabilities, net of effects of acquisitions and divestures:
Accounts receivable	(13,522)	46,421	(3,191)
Inventories	(4,547)	1,471	(3,892)
Prepaid expenses and other current assets	(1,845)	(2,296)	(3,561)
Other assets	(523)	(1,905)	(46)
Accounts payable	6,568	(12,838)	(3,757)
Accrued expenses	(8,759)	602	8,067
Unearned revenue	2,308	(7,924)	(5,513)
Other liabilities	(3,933)	(17,592)	(2,936)
Net cash provided by operating activities	36,579	57,868	89,527
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(13,539)	(11,880)	(22,269)
Patents and other intangibles	(318)	(498)	(180)
Distribution received from life insurance policies	0	20,443	0
Proceeds from sale of assets	678	1,734	887
Proceeds from sale of business, net of cash sold	873	0	2,980
Proceeds from insurance recovery	726	0	0
Proceeds (payment) from sale of discontinued operations	0	(225)	14,789
Net proceeds (premiums) on life insurance policies	1,357	(1,723)	(1,884)
Net cash provided by (used in) investing activities	(10,223)	7,851	(5,677)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt	(226,000)	(102,000)	(123,000)
Proceeds from long-term debt	155,000	56,000	138,000
Proceeds from Issuance of Common Stock	60,000	0	0
Transaction costs on the issuance of common shares	(861)	0	0
Debt financing costs	0	(1,536)	0
Dividends paid	(1,834)	(12,446)	(97,574)
Repurchase of common shares	(8,256)	(2,793)	(3,308)
Other financing activities	(508)	(230)	8
Net cash used in financing activities	(22,459)	(63,005)	(85,874)
NET CHANGE IN CASH AND CASH EQUIVALENTS	3,897	2,714	(2,024)
CASH AND CASH EQUIVALENTS, beginning of year	13,806	11,092	13,116
CASH AND CASH EQUIVALENTS, end of year	17,703	13,806	11,092
Supplemental disclosures of cash flow information:
Cash payments for interest	10,477	11,669	13,631
Cash payments for income taxes	9,066	21,325	13,804
Non-cash investing and financing activities:
Capital expenditures incurred but not paid for as of the end of the year	$ 1,361	$ 1,064	$ 222