CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 110,268	$ 98,958
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,660	10,183
Amortization of intangible assets	8,999	10,871
Amortization of debt issuance expenses	335	332
Share-based compensation expense	7,560	7,652
Deferred income taxes	3,027	(2,041)
Non-cash interest expense associated with forward starting swaps	1,588	1,632
Changes in (net of the effect from acquisitions):
Receivables	(21,402)	(30,816)
Inventories	(18,548)	(21,116)
Other current assets	(7,119)	16,881
Trade accounts payable	17,488	8,215
Accrued expenses	(24,606)	(27,273)
Other - net	1,413	(1,749)
Net cash flows provided by operating activities	88,663	71,729
Cash flows from investing activities
Purchases of property, plant and equipment	(12,875)	(10,009)
Proceeds from disposal of fixed assets	629	0
Other - net	(195)	(184)
Net cash flows used in investing activities	(12,441)	(10,193)
Cash flows from financing activities
Dividends paid	(33,446)	(28,945)
Proceeds from stock option exercises	8,870	6,590
Repurchases of common stock	(50,797)	0
Shares surrendered for tax withholding	(11,479)	(10,750)
Settlement of foreign exchange contracts	0	6,618
Other - net	(129)	0
Net cash flows used in financing activities	(86,981)	(26,487)
Effect of exchange rate changes on cash and cash equivalents	482	1,974
Net increase (decrease) in cash	(10,277)	37,023
Cash and cash equivalents at beginning of year	466,407	375,950
Cash and cash equivalents at end of period	456,130	412,973
Cash paid for:
Interest	323	355
Income taxes	13,911	10,942
Significant non-cash activities:
Capital expenditures for construction of new leased facility	$ 0	$ 5,801