Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net earnings	$ 60,884	$ 49,343	$ 47,177
Adjustments to reconcile net earnings to net cash provided by operations:
Depreciation	11,291	12,253	11,569
Amortization	16,571	12,963	12,577
Deferred income taxes	(3,055)	(3,082)	(1,524)
Noncurrent employee benefits	(234)	206	(40)
Stock-based compensation expense	2,330	1,415	1,214
Changes in:
Receivables	(1,240)	3,036	5,451
Inventories	(13,633)	5,129	(1,220)
Payables	7,005	(391)	11,642
Prepaid expenses and other current assets	(8,281)	(3,522)	(7,732)
Other liabilities	15,872	12,228	1,600
Total adjustments	26,626	40,235	33,537
Net cash provided by operations	87,510	89,578	80,714
Investing activities:
Property, plant and equipment additions	(6,746)	(9,059)	(7,496)
Proceeds from company owned life insurance plans	596
Acquisitions, net of cash acquired	(45,273)	(29,134)
Net cash used for investing activities	(51,423)	(38,193)	(7,496)
Financing activities:
Net decrease in short-term debt		(4,600)	(13,500)
Payment of contingent acquisition consideration		(1,001)	(2,555)
Dividends paid	(22,155)	(20,340)	(18,595)
Proceeds from exercise of stock options	2,036	1,058	1,961
Purchase of common stock for treasury stock	(460)	(3,116)	(5,207)
Issuance of treasury stock	72	180	187
Net cash used for financing activities	(20,507)	(27,819)	(37,709)
Effect of foreign exchange rates on cash	(679)	(164)	276
Increase in cash	14,901	23,402	35,785
Cash and cash equivalents — beginning of year	72,273	48,871	13,086
Cash and cash equivalents — end of year	87,174	72,273	48,871
Cash paid during the year for:
Income taxes	19,981	17,995	13,066
Interest	$ 118	$ 91	$ 268