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	$ 512,611	$ 375,972	$ 384,370
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	37,167	33,458	32,743
Amortization	47,524	42,671	36,052
Deferred tax provision	2,302	(2,745)	1,878
Share-based compensation	17,579	16,582	15,306
Provisional one-time charge on US tax reform	3,597	71,982	0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(18,674)	0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	0	0	8,189
Other	(2,559)	(3,151)	181
Increase (decrease) in cash resulting from changes in:
Trade accounts receivable, net	(19,540)	(38,985)	(52,151)
Inventories	(21,195)	(13,680)	(12,431)
Other current assets	622	(6,251)	291
Trade accounts payable	33,671	11,885	9,633
Taxes payable	(1,528)	13,615	(3,072)
Accruals and other	(26,572)	14,972	39,769
Net cash provided by operating activities	565,005	516,325	460,758
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	8,190	11,973	423
Purchase of property, plant and equipment	(142,726)	(127,426)	(123,957)
Acquisitions	(5,527)	(108,445)	(111,381)
Net hedging settlements on intercompany loans	(1,119)	(6,554)	(3,459)
Net cash used in investing activities	(138,944)	(217,344)	(231,456)
Cash flows from financing activities:
Proceeds from borrowings	940,615	1,244,195	905,774
Repayments of borrowings	(876,324)	(1,185,172)	(594,178)
Proceeds from exercise of stock options	24,600	28,649	25,471
Repurchases of common stock	(474,999)	(399,997)	(499,992)
Payments of Debt Issuance Costs	(1,914)	(7,205)	(680)
Net cash provided by (used in) financing activities	(388,022)	(319,530)	(163,605)
Effect of exchange rate changes on cash and cash equivalents	(8,616)	10,562	(5,910)
Net increase (decrease) in cash and cash equivalents	29,423	(9,987)	59,787
Cash and cash equivalents:
Cash and Cash Equivalents, at Carrying Value, Beginning	148,687	158,674	98,887
Cash and Cash Equivalents, at Carrying Value, End	178,110	148,687	158,674
Supplemental disclosures of cash flow information:
Interest	34,451	33,333	28,025
Taxes	$ 132,410	$ 109,730	$ 92,586