Consolidated Statements of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Net sales	$ 953,317us-gaap_SalesRevenueNet	$ 876,501us-gaap_SalesRevenueNet
Cost of sales	469,267us-gaap_CostOfGoodsAndServicesSold	428,023us-gaap_CostOfGoodsAndServicesSold
Gross profit	484,050us-gaap_GrossProfit	448,478us-gaap_GrossProfit
Operating and administrative expenses	280,387	269,843
Gain on sale of property and equipment	(108)	(216)
Operating income	203,771us-gaap_OperatingIncomeLoss	178,851us-gaap_OperatingIncomeLoss
Interest income	99us-gaap_InvestmentIncomeInterest	120us-gaap_InvestmentIncomeInterest
Interest expense	(358)us-gaap_InterestExpense	(126)us-gaap_InterestExpense
Earnings before income taxes	203,512	178,845
Income tax expense	75,906us-gaap_IncomeTaxExpenseBenefit	66,914us-gaap_IncomeTaxExpenseBenefit
Net earnings	$ 127,606us-gaap_NetIncomeLoss	$ 111,931us-gaap_NetIncomeLoss
Basic net earnings per share	$ 0.43us-gaap_EarningsPerShareBasic	$ 0.38us-gaap_EarningsPerShareBasic
Diluted net earnings per share	$ 0.43us-gaap_EarningsPerShareDiluted	$ 0.38us-gaap_EarningsPerShareDiluted
Basic weighted average shares outstanding	295,237,625	296,641,994
Diluted weighted average shares outstanding	295,936,718	297,495,170

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(a),(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688