Interim Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net Income (Loss) Attributable to Parent	$ 63,051	$ 58,051
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	8,301	8,420
Amortization	7,528	7,094
Deferred tax benefit	(1,670)	(695)
Excess tax benefits from share-based payment arrangements	(441)	(4,495)
Share-based compensation	3,496	3,201
Other	(16)	37
Increase (decrease) in cash resulting from changes in:
Trade accounts receivable, net	38,179	41,500
Inventories	(17,703)	(13,543)
Other current assets	183	511
Trade accounts payable	(13,927)	(26,550)
Taxes payable	(2,685)	(10,436)
Accruals and other	(25,700)	(20,250)
Net cash provided by operating activities	58,596	42,845
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	42	189
Purchase of property, plant and equipment	(18,539)	(16,716)
Payments to Acquire Businesses, Net of Cash Acquired	(200)	(391)
Payments for (Proceeds from) Derivative Instrument, Investing Activities	(8,384)	(235)
Net cash used in investing activities	(27,081)	(17,153)
Cash flows from financing activities:
Proceeds from borrowings	150,996	145,879
Repayments of borrowings	(77,486)	(93,229)
Proceeds from stock option exercises	9,546	3,450
Repurchases of common stock	(123,745)	(82,498)
Excess tax benefits from share - based payment arrangements	441	4,495
Net cash used in financing activities	(40,248)	(21,903)
Effect of exchange rate changes on cash and cash equivalents	(1,171)	141
Net (decrease) increase in cash and cash equivalents	(9,904)	3,930
Cash and cash equivalents:
Beginning of period	85,263	111,874
End of period	$ 75,359	$ 115,804