Interim Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net earnings	$ 204,772	$ 194,046
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	18,606	15,919
Amortization	23,705	20,294
Deferred tax benefit	(10,109)	(3,840)
Share-based compensation	8,236	7,793
Gain on facility sale	0	(3,394)
Other	(1,200)	230
Increase (decrease) in cash resulting from changes in:
Trade accounts receivable, net	34,509	23,541
Inventories	(19,959)	(21,164)
Other current assets	844	(235)
Trade accounts payable	5,425	(7,176)
Taxes payable	1,268	(9,058)
Accruals and other	(49,338)	(11,579)
Net cash provided by operating activities	216,759	205,377
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	4,530	10,209
Purchase of property, plant and equipment	(61,586)	(48,529)
Acquisitions	(500)	(697)
Payments for (Proceeds from) Derivative Instrument, Investing Activities	7,042	(1,033)
Net cash used in investing activities	(50,514)	(40,050)
Cash flows from financing activities:
Proceeds from borrowings	603,180	672,921
Repayments of borrowings	(502,524)	(615,162)
Proceeds from stock option exercises	9,960	16,935
Repurchases of common stock	(237,499)	(249,949)
Proceeds from (Payments for) Other Financing Activities	(1,635)	(7,205)
Net cash used in financing activities	(128,518)	(182,460)
Effect of exchange rate changes on cash and cash equivalents	(3,224)	4,793
Net (decrease) increase in cash and cash equivalents	34,503	(12,340)
Cash and cash equivalents:
Beginning of period	148,687	158,674
End of period	$ 183,190	$ 146,334