CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Net sales	$ 3,908,387	$ 3,675,997	$ 7,533,284	$ 6,874,799
Cost of goods sold	2,729,219	2,570,889	5,269,486	4,847,943
Gross profit	1,179,168	1,105,108	2,263,798	2,026,856
Operating expenses:
Selling, administrative and other expenses	832,205	753,527	1,636,006	1,427,139
Depreciation and amortization	36,783	36,853	73,640	62,852
Total operating expenses	868,988	790,380	1,709,646	1,489,991
Income before income taxes	310,180	314,728	554,152	536,865
Income taxes	112,453	98,371	198,941	176,119
Net income	197,727	216,357	355,211	360,746
Basic net income per common share	$ 1.29	$ 1.40	$ 2.31	$ 2.33
Diluted net income per common share	$ 1.28	$ 1.39	$ 2.30	$ 2.31
Dividends declared per common share	$ 0.5750	$ 0.5375	$ 1.1500	$ 1.0750
Weighted average common shares outstanding	153,463	155,050	153,595	154,971
Dilutive effect of stock options and non-vested restricted stock awards	1,069	1,094	1,063	1,075
Weighted average common shares outstanding - assuming dilution	154,532	156,144	154,658	156,046
Comprehensive income	$ 240,074	$ 114,068	$ 401,451	$ 262,015