CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net earnings	$ 33,912	$ 32,910	$ 91,516	$ 84,303
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization			38,828	36,831
Share-based compensation expense			6,431	4,017
Net loss (gain) on assets			203	(254)
Loss on divestitures and other charges			13,774	5,821
Deferred income taxes			3,793	(9,001)
Changes in operating assets and liabilities:
Trade accounts receivable			(35,290)	(7,962)
Inventories			(15,898)	17,433
Prepaid expenses and other assets			(15,016)	(4,726)
Accounts payable and other accrued expenses			24,007	9,018
Accrued salaries, wages, and withholdings from employees			1,763	7,410
Income taxes			(1,155)	(3,899)
Other liabilities			3,192	3,936
Net cash provided by operating activities			116,148	142,927
Cash Flows from Investing Activities:
Acquisition of property, plant, and equipment			(37,608)	(34,009)
Proceeds from sale of assets			201	1,022
Proceeds from divesture of businesses			36,790	12,228
Acquisition of new businesses			(13,875)	0
Other investing activities			1,348	4,955
Net cash used in investing activities			(13,144)	(15,804)
Cash flows from financing activities:
Proceeds from additional borrowings			55,589	33,164
Debt payments			(67,534)	(101,061)
Purchase of treasury stock			(31,467)	0
Dividends paid			(49,468)	(49,537)
Other financing activities			(582)	(415)
Net cash used in financing activities			(93,462)	(117,849)
Effect of exchange rate changes on cash and cash equivalents			(1,373)	(3,527)
Net increase in cash and cash equivalents			8,169	5,747
Cash and cash equivalents at beginning of period			24,770	21,153	$ 21,153
Cash and cash equivalents at end of period	$ 32,939	$ 26,900	$ 32,939	$ 26,900	$ 24,770