Interim Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net Income (Loss) Attributable to Parent	$ 93,304	$ 92,466
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	9,157	7,966
Amortization	11,735	10,045
Deferred tax benefit	(6,416)	(1,470)
Share-based compensation	4,354	3,822
Gain (Loss) on Disposition of Property Plant Equipment	0	(3,394)
Other	(1,269)	(10)
Increase (decrease) in cash resulting from changes in:
Trade accounts receivable, net	54,302	23,289
Inventories	(15,707)	(15,795)
Other current assets	2,419	(2,045)
Trade accounts payable	(3,451)	(10,614)
Taxes payable	(11,640)	(9,209)
Other Operating Activities, Cash Flow Statement	(60,224)	(27,452)
Net cash provided by operating activities	76,564	67,599
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	4,507	10,003
Purchase of property, plant and equipment	(29,774)	(21,015)
Payments to Acquire Businesses, Net of Cash Acquired	(500)	0
Payments for (Proceeds from) Derivative Instrument, Investing Activities	3,304	312
Net cash used in investing activities	(22,463)	(10,700)
Cash flows from financing activities:
Proceeds from borrowings	336,512	472,732
Repayments of borrowings	(331,114)	(409,881)
Proceeds from stock option exercises	5,669	8,201
Repurchases of common stock	(118,750)	(124,997)
Net cash used in financing activities	(107,683)	(53,945)
Effect of exchange rate changes on cash and cash equivalents	3,844	3,265
Net (decrease) increase in cash and cash equivalents	(49,738)	6,219
Cash and cash equivalents:
Beginning of period	148,687	158,674
End of period	$ 98,949	$ 164,893