CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Adjustments to reconcile net earnings to net cash provided by operating activities:
Net earnings	$ 15,424	$ 61,748
Depreciation and amortization	24,225	16,662
Stock-based compensation	7,646	8,090
Gain (Loss) on Disposition of Assets	2,991	0
Deferred income taxes	(165)	222
Other, net	(3,152)	(1,328)
Increase (decrease) in cash, net of acquisitions, resulting from changes in:
Accounts receivable	12,118	(25,771)
Inventories	(14,453)	(17,472)
Prepaid expenses and other current assets	382	1,944
Other assets	(391)	3,659
Accounts payable	1,592	26,019
Deferred revenue	2,140	(4,531)
Accrued payroll and other liabilities	11,084	(8,057)
Accrued income taxes	(6,259)	(1,722)
Other long-term liabilities	(2,316)	(3,952)
Net cash provided by operating activities	50,866	55,511
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment, net	(12,717)	(9,140)
Proceeds from sale of assets	0	2,973
Business acquisitions, net of cash acquired	0	(579,556)
Minority interest and other investments	0	(5,000)
Net cash used in investing activities	(12,717)	(590,723)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from credit facility and long-term debt, including current portion	175,000	723,054
Repayments of credit facility	3,021	375,000
Repurchase of common stock	(150,000)	(24,998)
Dividends paid	(22,728)	(23,031)
Proceeds from shares issued pursuant to stock-based compensation plans	1,459	9,721
Payment, Tax Withholding, Share-based Payment Arrangement	(879)	(1,013)
Other financing activities	0	(419)
Net cash (used in) provided by financing activities	(169)	308,314
Effect of exchange rate changes on cash and cash equivalents	(13,957)	(883)
Net increase (decrease) in cash and cash equivalents	24,023	(227,781)
Cash, cash equivalents and restricted cash, beginning of year	284,592	512,144
Cash, cash equivalents and restricted cash, end of period	$ 308,615	$ 284,363