CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Statement of Cash Flows [Abstract]
Cash and Cash Equivalents	$ 284,592	$ 512,144
CASH PROVIDED BY OPERATING ACTIVITIES:
Net earnings	171,597	282,425	$ 107,223
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	103,132	66,462	71,010
Stock-based compensation	36,689	34,170	31,018
Asset Impairment Charges	13,666	3,349	0
Loss on assets held for sale	0	0	23,588
Deferred income taxes	44,934	14,604	25,968
Other, net	4,123	(3,832)	(31,256)
Increase (decrease) in cash, net of acquisitions, resulting from changes in:
Accounts receivable	19,372	29,057	(7,758)
Inventories	(24,360)	17,425	(32,961)
Prepaid expenses and other current assets	(1,744)	(3,427)	1,217
Other assets	(1,099)	(2,663)	(12,027)
Accounts payable	51,752	(22,449)	21,558
Deferred revenue	(6,187)	8,081	(9,220)
Accrued payroll and other liabilities	(8,339)	6,599	17,076
Accrued income taxes	(24,723)	(74,888)	84,352
Other long-term liabilities	(10,639)	13,918	(5,590)
Net cash provided by operating activities	370,372	374,157	308,252
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment, net	(44,794)	(30,773)	(42,109)
Business acquisitions, net of cash acquired	(601,927)	(26,764)	0
Proceeds from sale of assets	6,365	3,017	3,686
Proceeds from Divestiture of Businesses	0	25,920	0
Payments for (Proceeds from) Other Investing Activities	(11,030)	(15,500)	0
Net cash used by investing activities	(651,386)	(44,100)	(38,423)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from credit facility and long-term debt, including current portion	723,054	0	0
Repayment of credit facility and long-term debt	(468,224)	0	(97,500)
Repurchase of common stock	(124,998)	(243,706)	0
Repurchase of common stock	124,998	243,706
Dividends paid	91,694	88,123	82,605
Proceeds from shares issued pursuant to stock-based compensation plans	28,418	29,124	58,241
Tax paid for net share exercises and issuance of vested restricted stock units	11,993	16,228	10,731
Other financing activities	(523)	(11)	(17)
Net cash provided (used) by financing activities	54,040	(318,944)	(132,612)
Effect of exchange rate changes on cash and cash equivalents	(578)	(18,059)	20,524
Net (decrease) increase in cash and cash equivalents	(227,552)	(6,946)	157,741
Cash and cash equivalents, beginning of year	512,144	519,090	361,349
Cash and cash equivalents, end of year	$ 284,592	$ 512,144	$ 519,090