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 earnings	$ 96,104	$ 84,623	$ 79,671
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	48,879	51,281	45,862
Stock compensation expense	10,802	8,303	7,596
Deferred income taxes	(5,944)	(4,627)	(3,563)
Provision for doubtful accounts	180	140	1,776
Unrealized (gain)/loss on foreign currency transactions and deferred compensation	(384)	173	72
Asset impairment charge	1,675	1,915	1,140
(Gain)/loss on disposal of assets	(1,728)	153	(3,134)
Changes in assets and liabilities, net of acquired balances
Accounts receivable	(20,700)	(3,599)	11,623
Inventories	(21,023)	13,923	(11,401)
Prepaid expenses and other current assets	(881)	(2,856)	477
Accounts payable and accrued expenses	47,067	(992)	1,134
Income taxes	4,787	1,859	(5,664)
Other	1,680	198	(1,128)
Net cash provided by operating activities	160,514	150,494	124,461
Cash flows from investing activities:
Capital expenditures and intangible assets acquired	(37,449)	(33,828)	(28,413)
Cash paid for acquisitions, net of cash acquired	0	0	(141,062)
Proceeds from sale of business and assets	318	87	11,523
Proceeds from insurance	1,831	0	2,727
Purchase of convertible notes	0	(850)	(1,000)
Net cash used in investing activities	(35,300)	(34,591)	(156,225)
Cash flows from financing activities:
Proceeds from revolving loan	5,000	10,000	168,569
Principal payments on revolving loan	(60,000)	(95,000)	(76,000)
Principal payments on finance lease	(159)	(151)	0
Principal payment on acquired debt	0	0	(17,567)
Proceeds from stock options exercised	6,943	14,155	4,839
Dividends paid	(18,723)	(16,705)	(15,135)
Repurchases of common stock	(35,239)	(13,463)	(21,321)
Net cash (used in) provided by financing activities	(102,178)	(101,164)	43,385
Effect of exchange rate changes on cash	(4,368)	4,160	(217)
Increase in cash and cash equivalents	18,668	18,899	11,404
Cash and cash equivalents beginning of period	84,571	65,672	54,268
Cash and cash equivalents end of period	$ 103,239	$ 84,571	$ 65,672