CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities
Net income	$ 187,660	$ 156,649
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	26,413	27,204
Amortization of intangible assets	33,282	30,734
Amortization of debt issuance expenses	1,275	1,109
Share-based compensation expense	13,464	11,162
Deferred income taxes	1,184	4,621
Excess tax benefit from share based compensation	(6,897)	(3,295)
Non-cash interest expense associated with forward starting swaps	5,587	5,743
Changes in:
Receivables	2,954	(8,199)
Inventories	2,644	9,187
Other current assets	7,381	(7,216)
Trade accounts payable	13,209	(2,797)
Accrued expenses	11,062	15,929
Other — net	692	(333)
Net cash flows provided by operating activities	299,910	240,498
Cash flows from investing activities
Cash purchases of property, plant and equipment	(23,140)	(28,108)
Acquisition of businesses, net of cash acquired	(36,849)	(69,021)
Other — net	(217)	(365)
Net cash flows used in investing activities	(60,206)	(97,494)
Cash flows from financing activities
Borrowings under revolving facilities for acquisitions	34,648	35,000
Borrowings under revolving facilities	28,426	69,503
Payments under revolving facilities	(67,009)	(130,395)
Dividends paid	(53,957)	(47,552)
Proceeds from stock option exercises	29,838	35,015
Excess tax benefit from stock-based compensation	6,897	3,295
Purchase of common stock	(137,272)	(75,174)
Unvested shares surrendered for tax withholding	(1,781)	(2,326)
Other	(3,181)	(1,240)
Net cash flows used in financing activities	(163,391)	(113,874)
Effect of exchange rate changes on cash and cash equivalents	4,628	1,114
Net increase in cash	80,941	30,244
Cash and cash equivalents at beginning of year	318,864	230,259
Cash and cash equivalents at end of period	399,805	260,503
Cash paid for:
Interest	17,431	22,610
Income taxes	48,161	62,053
Significant non-cash activities:
Contingent consideration for acquisition	0	8,370
Debt acquired with acquisition of business	$ 0	$ 4,680