CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net earnings	$ 25,936	$ 30,620	$ 57,604	$ 51,393
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization			25,817	24,522
Share-based compensation expense			4,188	2,662
Net loss on assets			206	50
Loss on divestitures and other charges			13,511	6,634
Deferred income taxes			1,702	1,075
Changes in operating assets and liabilities:
Trade accounts receivable			(26,902)	(20,494)
Inventories			19,357	24,816
Prepaid expenses and other assets			(15,573)	(3,975)
Accounts payable and other accrued expenses			9,632	9,961
Accrued salaries, wages, and withholdings from employees			(3,944)	6,483
Income taxes			1,953	3,899
Other liabilities			1,710	588
Net cash provided by operating activities			89,261	107,614
Cash Flows from Investing Activities:
Acquisition of property, plant, and equipment			(25,550)	(21,417)
Proceeds from sale of assets			169	6
Proceeds from divesture of businesses			36,255	11,255
Other investing activities			(254)	4,395
Net cash provided by (used in) investing activities			10,620	(5,761)
Cash flows from financing activities:
Proceeds from additional borrowings			25,997	38,670
Debt payments			(62,578)	(98,849)
Purchase of treasury stock			(22,507)	0
Dividends paid			(33,027)	(33,018)
Other financing activities			(582)	(414)
Net cash used in financing activities			(92,697)	(93,611)
Effect of exchange rate changes on cash and cash equivalents			1,352	(8,519)
Net increase (decrease) in cash and cash equivalents			8,536	(277)
Cash and cash equivalents at beginning of period			24,770	21,153	$ 21,153
Cash and cash equivalents at end of period	$ 33,306	$ 20,876	$ 33,306	$ 20,876	$ 24,770