Acquisitions (Details) (USD $)	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Summary of pro-forma consolidated financial information
Net sales	$ 2,136,344,000	$ 1,870,978,000
Net income	100,216,000	68,349,000
Net income per common share:
Basic	$ 0.97	$ 0.64
Diluted	$ 0.95	$ 0.63
Acquisition of Leighs Paints [Member]
Acquisitions (Textual) [Abstract]
Aggregate consideration paid for acquisition, net of cash acquired	$ 41,800,000

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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