CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH PROVIDED BY OPERATING ACTIVITIES:
Net earnings	$ 29,894	$ 51,636
Income items not affecting cash:
Depreciation and amortization	16,470	14,871
Deferred income taxes	1,507	44
Stock-based compensation arrangements	8,756	5,696
Other non-cash items, net	(1,490)	2,374
Changes in operating assets and liabilities:
Decrease in accounts receivable	15,452	27,310
Decrease (increase) in inventories	5,424	(9,704)
Decrease (increase) in prepaid expenses and other current assets	422	(1,234)
Increase in other assets	(10,729)	(2,988)
Increase (decrease) in accounts payable	6,527	(9,636)
Decrease in deferred revenue	(4,431)	(169)
Decrease in accrued payroll and other liabilities	(8,020)	(1,029)
Decrease in accrued income taxes	(1,097)	(16,130)
Increase in other long-term liabilities	1,140	918
Cash provided by operating activities	59,825	61,959
CASH USED BY INVESTING ACTIVITIES:
Additions to property and equipment, net	(9,590)	(12,648)
Cash used by investing activities	(9,590)	(12,648)
CASH USED BY FINANCING ACTIVITIES:
Repayments of long term debt, net	(3,750)	0
Repurchase of common stock	(1,766)	(108,361)
Dividends paid	(14,085)	(13,106)
Proceeds from shares issued pursuant to stock-based compensation plans	8,876	1,179
Excess tax benefit of stock options exercised	2,698	234
Other financing activities	252	(22)
Cash used by financing activities	(7,775)	(120,076)
Effect of exchange rate changes on cash	(841)	(4,967)
Net increase (decrease) in cash and cash equivalents	41,619	(75,732)
Cash and cash equivalents, beginning of period	542,476	321,739
Cash and cash equivalents, end of period	$ 584,095	$ 246,007