CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 206,084	$ 159,743
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,957	18,633
Amortization of intangible assets	20,667	23,893
Amortization of debt issuance expenses	664	659
Share-based compensation expense	13,252	12,398
Deferred income taxes	(3,021)	2,414
Non-cash interest expense associated with forward starting swaps	3,259	3,323
Changes in (net of the effect from acquisitions):
Receivables	(40,044)	(31,110)
Inventories	(28,011)	(4,796)
Other current assets	17,798	(8,446)
Trade accounts payable	5,432	6,469
Accrued expenses	(21,131)	(9,799)
Other - net	(2,480)	(801)
Net cash flows provided by operating activities	192,426	172,580
Cash flows from investing activities
Purchases of property, plant and equipment	(20,968)	(19,539)
Purchase of intellectual property	(4,000)	0
Other - net	(861)	96
Net cash flows used in investing activities	(25,829)	(19,443)
Cash flows from financing activities
Borrowings under revolving facilities	0	33,000
Payments under revolving credit facilities	0	(166,297)
Dividends paid	(61,916)	(54,572)
Proceeds from stock option exercises	13,616	12,984
Purchases of common stock	(19,499)	(9,799)
Shares surrendered for tax withholding	(10,750)	(5,814)
Settlement of foreign exchange contracts	6,593	4,406
Net cash flows used in financing activities	(71,956)	(186,092)
Effect of exchange rate changes on cash and cash equivalents	(11,840)	15,352
Net increase (decrease) in cash	82,801	(17,603)
Cash and cash equivalents at beginning of year	375,950	235,964
Cash and cash equivalents at end of period	458,751	218,361
Cash paid for:
Interest	18,223	19,052
Income taxes - net	38,190	50,709
Significant non-cash activities:
Capital expenditures for construction of new leased facility	$ 11,971	$ 0