CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 330,565	$ 276,710
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairments	815	85
Depreciation and amortization	32,281	30,851
Amortization of intangible assets	40,681	31,123
Amortization of debt issuance expenses	1,354	1,351
Share-based compensation expense	18,575	21,155
Deferred income taxes	(7,070)	1,323
Non-cash interest expense associated with forward starting swaps	3,275	5,153
Termination of the U.S. pension plan	9,688	0
Changes in (net of the effect from acquisitions/divestitures):
Receivables	(59,249)	33,291
Inventories	(28,072)	17,920
Other current assets	6,041	(27,655)
Trade accounts payable	20,962	(11,496)
Deferred revenue	14,817	27,179
Accrued expenses	17,595	125
Other - net	(29)	784
Net cash flows provided by operating activities	402,229	407,899
Cash flows from investing activities
Purchases of property, plant and equipment	(45,487)	(39,438)
Acquisition of businesses, net of cash acquired	(575,606)	(118,159)
Note receivable from collaborative partner	(4,200)	0
Proceeds from disposal of fixed assets	250	2,230
Other - net	874	(238)
Net cash flows used in investing activities	(624,169)	(155,605)
Cash flows from financing activities
Borrowings under revolving credit facilities	0	150,000
Payments under revolving credit facilities	0	(150,000)
Payment of make-whole redemption premium	(6,659)	(6,756)
Debt issuance costs	(4,626)	(4,741)
Dividends paid	(120,289)	(114,248)
Proceeds from stock option exercises	12,497	28,729
Repurchases of common stock	0	(110,342)
Shares surrendered for tax withholding	(5,680)	(12,198)
Other - net	(74)	(352)
Net cash flows provided by (used in) financing activities	24,549	(20,808)
Effect of exchange rate changes on cash and cash equivalents	(21,963)	13,691
Net (decrease) increase in cash	(219,354)	245,177
Cash and cash equivalents at beginning of year	1,025,851	632,581
Cash and cash equivalents at end of period	806,497	877,758
Cash paid for:
Interest	17,839	16,415
Income taxes	93,859	66,268
3.00% Senior Notes, due May 2030
Cash flows from financing activities
Proceeds from Issuance of Senior Notes	0	499,100
2.625% Senior Notes, due June 2031
Cash flows from financing activities
Proceeds from Issuance of Senior Notes	499,380	0
4.5% Senior Notes
Cash flows from financing activities
Payment of Senior Notes	0	(300,000)
4.20% Senior Notes, due December 2021
Cash flows from financing activities
Payment of Senior Notes	$ (350,000)	$ 0