CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 101,998	$ 110,268
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,453	9,660
Amortization of intangible assets	9,544	8,999
Amortization of debt issuance expenses	343	335
Share-based compensation expense	6,730	7,560
Deferred income taxes	2,012	3,027
Non-cash interest expense associated with forward starting swaps	1,545	1,588
Changes in (net of the effect from acquisitions):
Receivables	(24,190)	(21,402)
Inventories	(23,717)	(18,548)
Other current assets	(14,267)	(7,119)
Trade accounts payable	14,146	17,488
Accrued expenses	2,060	(24,606)
Other - net	(1,897)	1,413
Net cash flows provided by operating activities	84,760	88,663
Cash flows from investing activities
Purchases of property, plant and equipment	(12,762)	(12,875)
Acquisition of businesses, net of cash acquired	(120,839)	0
Proceeds from disposal of fixed assets	41	629
Other - net	(160)	(195)
Net cash flows used in investing activities	(133,720)	(12,441)
Cash flows from financing activities
Borrowings under revolving credit facilities	150,000	0
Dividends paid	(38,736)	(33,446)
Proceeds from stock option exercises	2,089	8,870
Repurchases of common stock	(108,907)	(50,797)
Shares surrendered for tax withholding	(12,119)	(11,479)
Other - net	(129)	(129)
Net cash flows used in financing activities	(7,802)	(86,981)
Effect of exchange rate changes on cash and cash equivalents	(6,600)	482
Net increase (decrease) in cash	(63,362)	(10,277)
Cash and cash equivalents at beginning of year	632,581	466,407
Cash and cash equivalents at end of period	569,219	456,130
Cash paid for:
Interest	276	323
Income taxes	$ 10,492	$ 13,911