CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income	$ 172,862	$ 223,477
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,591	19,870
Amortization of intangible assets	20,032	17,953
Amortization of debt issuance expenses	976	669
Share-based compensation expense	13,665	14,413
Deferred income taxes	2,421	10,685
Non-cash interest expense associated with forward starting swaps	4,284	3,171
Changes in (net of the effect from acquisitions):
Receivables	34,253	(14,177)
Inventories	(9,529)	(21,007)
Other current assets	(18,421)	(12,382)
Trade accounts payable	(6,842)	17,276
Accrued expenses	17,776	(39,602)
Other - net	2,145	(508)
Net cash flows provided by operating activities	254,213	219,838
Cash flows from investing activities
Purchases of property, plant and equipment	(21,085)	(25,742)
Acquisition of businesses, net of cash acquired	(120,839)	0
Proceeds from disposal of fixed assets	2,114	780
Other - net	(636)	501
Net cash flows (used in) investing activities	(140,446)	(24,461)
Cash flows from financing activities
Borrowings under revolving credit facilities	150,000	0
Proceeds from issuance of 3.0% Senior Notes	499,100	0
Payment of 4.5% Senior Notes	(300,000)	0
Payments under revolving credit facilities	(150,000)	0
Payment of make-whole redemption premium	(6,756)	0
Debt issuance costs	(4,166)	0
Dividends paid	(76,498)	(71,283)
Proceeds from stock option exercises	13,111	20,761
Repurchases of common stock	(110,342)	(54,668)
Shares surrendered for tax withholding	(12,148)	(11,509)
Other - net	(251)	(1,929)
Net cash flows provided by (used in) financing activities	2,050	(118,628)
Effect of exchange rate changes on cash and cash equivalents	(2,050)	33
Net increase in cash	113,767	76,782
Cash and cash equivalents at beginning of year	632,581	466,407
Cash and cash equivalents at end of period	746,348	543,189
Cash paid for:
Interest	16,089	18,282
Income taxes	$ 21,781	$ 55,702