CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH PROVIDED BY OPERATING ACTIVITIES:
Net earnings	$ 107,223	$ 166,626	$ 241,686
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	71,010	57,513	49,534
Deferred income taxes	25,968	5,613	2,863
Stock-based compensation arrangements	31,018	27,797	25,748
Gain on sale of assets, net	0	0	(19,166)
Impairment of Long-Lived Assets to be Disposed of	23,588	0	0
Other, net	(31,256)	11,992	7,722
Increase (decrease) in cash, net of acquisitions, resulting from changes in:
Accounts receivable	(7,758)	(10,704)	28,258
Inventories	(32,961)	51,170	(74,816)
Prepaid expenses	1,217	(7,706)	1,858
Other assets	(12,027)	10,750	4,333
Accounts payable	21,558	(33,465)	38,660
Deferred revenue	(9,220)	2,928	3,503
Accrued payroll and other liabilities	17,076	(10,147)	(10,704)
Accrued income taxes	84,352	66,302	(1,076)
Pension and other long-term liabilities	(5,590)	2,582	3,688
Net cash provided by operating activities	308,252	319,751	293,425
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment	(42,109)	(35,940)	(68,234)
Business acquisitions, net of cash acquired	0	(419,203)	(92,260)
Proceeds from sale of assets	3,686	7,331	25,649
Net cash used by investing activities	(38,423)	(447,812)	(134,845)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds of long-term debt, including current portion	0	524,560	0
Repayment of long-term debt	(97,500)	(367,435)	(15,000)
Repurchase of common stock	0	(66,057)	(123,193)
Dividends paid	(82,605)	(65,920)	(61,399)
Proceeds from shares issued pursuant to stock-based compensation plans	58,241	11,966	22,499
Tax paid for net share exercises and issuance of vested restricted stock units	(10,731)	(5,991)	(7,032)
Other financing activities	(17)	13	(24)
Net cash (used) provided by financing activities	(132,612)	31,136	(184,149)
Effect of exchange rate changes on cash	20,524	(14,511)	(33,020)
Net increase (decrease) in cash and cash equivalents	157,741	(111,436)	(58,589)
Cash and cash equivalents, beginning of year	361,349	472,785	531,374
Cash and cash equivalents, end of year	$ 519,090	$ 361,349	$ 472,785