Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net earnings	$ 105,367	$ 96,104	$ 84,623
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	51,848	48,879	51,281
Stock compensation expense	13,224	10,802	8,303
Deferred income taxes	(8,362)	(5,944)	(4,627)
Provision for doubtful accounts	401	180	140
Unrealized loss/(gain) on foreign currency transactions and deferred compensation	914	(384)	173
Asset impairment charge	23	1,675	1,915
Loss/(gain) on disposal of assets	343	(1,728)	153
Changes in assets and liabilities, net of acquired balances
Accounts receivable	(3,618)	(20,700)	(3,599)
Inventories	(7,804)	(21,023)	13,923
Prepaid expenses and other current assets	1,870	(881)	(2,856)
Accounts payable and accrued expenses	(15,543)	47,067	(992)
Income taxes	296	4,787	1,859
Other	(423)	1,680	198
Net cash provided by operating activities	138,536	160,514	150,494
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	(365,780)	0	0
Capital expenditures and intangible assets acquired	(50,290)	(37,449)	(33,828)
Proceeds from sale of assets	206	318	87
Proceeds from insurance	0	1,831	0
Purchase of convertible notes	(150)	0	(850)
Net cash used in investing activities	(416,014)	(35,300)	(34,591)
Cash flows from financing activities:
Proceeds from revolving loan	435,000	5,000	10,000
Principal payments on revolving loan	(103,000)	(60,000)	(95,000)
Principal payment on acquired debt	(30,988)	0	0
Cash paid for financing costs	(1,232)	0	0
Principal payments on finance lease	(177)	(159)	(151)
Proceeds from stock options exercised	3,212	6,943	14,155
Dividends paid	(20,713)	(18,723)	(16,705)
Repurchases of common stock	(35,423)	(35,239)	(13,463)
Net cash provided by (used in) financing activities	246,679	(102,178)	(101,164)
Effect of exchange rate changes on cash	(5,880)	(4,368)	4,160
(Decrease) increase in cash and cash equivalents	(36,679)	18,668	18,899
Cash and cash equivalents beginning of period	103,239	84,571	65,672
Cash and cash equivalents end of period	$ 66,560	$ 103,239	$ 84,571