CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities
Net earnings	$ 157,360	$ 89,600	$ 126,256
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization	53,244	48,518	47,019
Share-based compensation	503	5,855	7,709
Net loss on assets	63	2,552	9,755
Loss on divestiture of business	0	33,160	0
Liquidation of foreign entity	0	0	(3,257)
Deferred income taxes	9,844	17,414	10,428
Changes in operating assets and liabilities:
Trade accounts receivable	(96,638)	(130,835)	(4,270)
Inventories	(34,114)	(47,345)	(20,064)
Prepaid expenses and other assets	(12,544)	14,072	(4,096)
Accounts payable and other accrued expenses	7,457	4,804	2,332
Accrued salaries, wages and withholdings from employees	599	(4,361)	3,347
Income taxes	(7,335)	2,846	5,959
Other liabilities	5,081	27	2,521
Net cash provided by operating activities	83,520	36,307	183,639
Cash Flows from Investing Activities
Acquisition of property, plant and equipment	(50,740)	(56,344)	(81,216)
Cash receipts on sold receivables	91,142	141,465	35,414
Proceeds from sale of assets	2,615	10,485	6,254
Proceeds from divesture of business	0	12,457	0
Acquisition of new businesses	(31,100)	0	0
Other investing activities	2,916	2,319	3,184
Net cash provided by (used in) investing activities	14,833	110,382	(36,364)
Cash Flows from Financing Activities
Proceeds from additional borrowings	322,529	231,174	222,562
Debt payments	(284,332)	(239,950)	(247,092)
Purchase of treasury stock	(76,734)	(87,217)	(50,100)
Dividends paid	(57,410)	(54,038)	(49,635)
Other financing activities	(2,777)	(3,383)	(3,706)
Net cash used in financing activities	(98,724)	(153,414)	(127,971)
Effect of exchange rate changes on cash and cash equivalents	2,928	10,204	(5,436)
Net increase in cash and cash equivalents	2,557	3,479	13,868
Cash and cash equivalents at beginning of year	29,344	25,865	11,997
Cash and cash equivalents at end of year	31,901	29,344	25,865
Cash paid during the year for:
Interest	21,567	19,523	18,474
Income taxes	24,089	29,261	29,217
Capitalized interest	$ 604	$ 486	$ 1,061