CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities
Net income	$ 74,548	$ 61,300
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	8,394	8,948
Amortization of intangible assets	10,863	10,891
Amortization of debt issuance expenses	429	425
Share-based compensation expense	6,312	5,612
Deferred income taxes	(748)	(117)
Excess tax benefit from share based compensation	(2,925)	(2,439)
Non-cash interest expense associated with forward starting swaps	1,820	1,872
Changes in:
Receivables	(33,910)	(14,843)
Inventories	(12,605)	(3,115)
Other current assets	(6,285)	(3,513)
Trade accounts payable	15,392	6,303
Accrued expenses	14,419	1,043
Other — net	(1,519)	(172)
Net cash flows provided by operating activities	74,185	72,195
Cash flows from investing activities
Cash purchases of property, plant and equipment	(10,809)	(7,625)
Acquisition of businesses, net of cash acquired	0	(34,648)
Other — net	21	(57)
Net cash flows used in investing activities	(10,788)	(42,330)
Cash flows from financing activities
Borrowings under revolving facilities for acquisitions	0	34,648
Borrowings under revolving facilities	20,014	5,438
Payments under revolving facilities	(13,617)	(305)
Dividends paid	(18,628)	(16,575)
Proceeds from stock option exercises	6,154	10,758
Excess tax benefit from stock-based compensation	2,925	2,439
Purchase of common stock	(37,537)	(33,115)
Unvested shares surrendered for tax withholding	(2,614)	(1,735)
Net cash flows provided by (used in) financing activities	(43,303)	1,553
Effect of exchange rate changes on cash and cash equivalents	(1,340)	(9,237)
Net increase in cash	18,754	22,181
Cash and cash equivalents at beginning of year	439,629	318,864
Cash and cash equivalents at end of period	458,383	341,045
Cash paid for:
Interest	85	545
Income taxes	$ 17,835	$ 7,002