CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities
Net earnings	$ 109,472	$ 82,047	$ 157,360
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization	49,641	55,015	53,244
Share-based compensation expense (income)	5,608	(739)	503
Net (gain) loss on assets	(252)	(1,122)	63
Loss on divestitures and other charges	6,904	44,375	0
Deferred income taxes	(8,705)	(19,340)	9,844
Changes in operating assets and liabilities:
Trade accounts receivable	(11,357)	10,930	(96,638)
Inventories	46,828	25,238	(34,114)
Prepaid expenses and other assets	(12,868)	3,257	(12,544)
Trade accounts payable and other accrued expenses	15,524	(18,251)	7,457
Accrued salaries, wages, and withholdings from employees	15,140	(3,039)	599
Income taxes	22	(1,836)	(7,335)
Other liabilities	2,823	647	5,081
Net cash provided by operating activities	218,780	177,182	83,520
Cash Flows from Investing Activities:
Acquisition of property, plant, and equipment	(52,162)	(39,100)	(50,740)
Cash receipts on sold receivables	0	0	91,142
Proceeds from sale of assets	1,075	2,242	2,615
Proceeds from divestiture of businesses	12,595	0	0
Acquisition of new business	0	0	(31,100)
Other investing activities	5,071	(553)	2,916
Net cash (used in) provided by investing activities	(33,421)	(37,411)	14,833
Cash Flows from Financing Activities
Proceeds from additional borrowings	36,667	47,083	322,529
Debt payments	(154,348)	(134,449)	(284,332)
Purchase of treasury stock	0	0	(76,734)
Dividends paid	(66,057)	(62,190)	(57,410)
Other financing activities	(415)	(1,027)	(2,777)
Net cash used in financing activities	(184,153)	(150,583)	(98,724)
Effect of exchange rate changes on cash and cash equivalents	2,411	64	2,928
Net increase (decrease) in cash and cash equivalents	3,617	(10,748)	2,557
Cash and cash equivalents at beginning of year	21,153	31,901	29,344
Cash and cash equivalents at end of year	24,770	21,153	31,901
Cash paid during the year for:
Interest	14,751	20,130	21,567
Income taxes	44,755	40,139	24,089
Capitalized interest	$ 514	$ 540	$ 604