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Note 13 - Acquisitions (Detail) - Pro Forma (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue (in Dollars)	$ 895,813	$ 734,638	$ 2,512,479	$ 2,003,178
Income from continuing operations, net of tax (in Dollars)	$ 23,492	$ 16,542	$ 60,987	$ 39,848
Basic income per share from continuing operations, net of tax	$ 0.92	$ 0.63	$ 2.37	$ 1.51
Diluted income per share from continuing operations, net of tax	$ 0.91	$ 0.62	$ 2.33	$ 1.49

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect per basic share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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- Definition

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, per diluted share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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