CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Statement of Cash Flows [Abstract]
Cash and Cash Equivalents	$ 297,795	$ 284,592
CASH PROVIDED BY OPERATING ACTIVITIES:
Net earnings	212,584	171,597	$ 282,425
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	94,740	103,132	66,462
Stock-based compensation	39,164	36,689	34,170
Other Asset Impairment Charges	3,669	13,666	3,349
Gain (Loss) on Extinguishment of Debt	9,126	0	0
Gain (Loss) on Sale of Assets and Asset Impairment Charges	4,803	4,141	0
Other, net	8,034	(18)	(3,832)
Increase (decrease) in cash, net of acquisitions, resulting from changes in:
Accounts receivable	(29,696)	19,372	29,057
Inventories	(71,053)	(24,360)	17,425
Prepaid expenses and other current assets	12,447	(1,744)	(3,427)
Other assets	(12,485)	(1,099)	(2,663)
Accounts payable	(4,348)	51,752	(22,449)
Deferred revenue	(3,266)	(6,187)	8,081
Accrued payroll and other liabilities	860	(8,339)	6,599
Accrued income taxes	28,808	(24,723)	(74,888)
Other long-term liabilities	(17,196)	(10,639)	13,918
Net cash provided by operating activities	312,363	370,372	374,157
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment, net	(57,151)	(44,794)	(30,773)
Business acquisitions, net of cash acquired	(26,614)	(601,927)	(26,764)
Proceeds from sale of assets	0	6,365	3,017
Proceeds from Divestiture of Businesses	0	0	25,920
Payments for (Proceeds from) Other Investing Activities	310	(11,030)	(15,500)
Net cash used in investing activities	(83,455)	(651,386)	(44,100)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of common stock	(166,311)	(124,998)	(243,706)
Dividends paid	89,544	91,694	88,123
Proceeds from shares issued pursuant to stock-based compensation plans	11,981	28,418	29,124
Tax paid for net share exercises and issuance of vested restricted stock units	11,274	11,993	16,228
Other financing activities	0	(523)	(11)
Net cash (used in) provided by financing activities	(223,102)	54,040	(318,944)
Effect of exchange rate changes on cash and cash equivalents	7,397	(578)	(18,059)
Cash and cash equivalents, beginning of year	284,592	512,144	519,090
Cash and cash equivalents, end of year	297,795	284,592	512,144
Repayments of Unsecured Debt	(425,000)	0	0
Payment for Debt Extinguishment or Debt Prepayment Cost	(8,509)	0	0
Senior unsecured notes, proceeds	494,234	0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	13,203	(227,552)	(6,946)
Deferred Income Tax Expense (Benefit)	11,202	44,934	14,604
Proceeds from Issuance of Other Long-term Debt	175,000	723,054	0
Repayments of Other Long-term Debt	$ 203,679	$ 468,224	$ 0