CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH PROVIDED BY OPERATING ACTIVITIES:
Net earnings	$ 74,652	$ 101,794
Income items not affecting cash:
Depreciation and amortization	30,706	30,102
Deferred income taxes	915	26
Stock-based compensation arrangements	17,203	13,327
Other non-cash items, net	(3,599)	(577)
Changes in operating assets and liabilities:
Decrease in accounts receivable	15,929	54,205
(Increase) decrease in inventories	(7,414)	13,732
Decrease (increase) in prepaid expenses and other current assets	233	(7,243)
Increase in other assets	(12,188)	(3,048)
Increase (decrease) in accounts payable	14,764	(3,865)
Decrease in deferred revenue	(3,761)	(2,508)
Increase in accrued payroll and other liabilities	5,473	7,618
Decrease in accrued income taxes	(3,937)	(6,629)
Increase in other long-term liabilities	1,437	329
Cash provided by operating activities	130,413	197,263
CASH USED BY INVESTING ACTIVITIES:
Additions to property and equipment, net	(25,828)	(23,291)
Business acquisitions, net of cash acquired	0	5,165
Cash used by investing activities	(25,828)	(28,456)
CASH (USED) PROVIDED BY FINANCING ACTIVITIES:
Proceeds from long-term debt, including current portion	0	150,000
Repayments of long term debt, net	(7,500)	(3,750)
Repurchase of common stock	(43,003)	(116,830)
Dividends paid	(28,245)	(25,909)
Proceeds from shares issued pursuant to stock-based compensation plans	28,969	3,885
Excess tax benefit of stock options exercised	6,559	469
Other financing activities	(14)	(966)
Cash (used) provided by financing activities	(43,234)	6,899
Effect of exchange rate changes on cash	(1,754)	(5,012)
Net increase in cash and cash equivalents	59,597	170,694
Cash and cash equivalents, beginning of period	542,476	321,739
Cash and cash equivalents, end of period	$ 602,073	$ 492,433