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Note 15 - Acquisitions (Detail) - Pro Forma (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue (in Dollars)	$ 3,386,066	$ 2,789,436	$ 2,210,073
Income from continuing operations, net of tax (in Dollars)	$ 80,064	$ 56,904	$ 14,779
Basic income per share from continuing operations, net of tax	$ 3.12	$ 2.17	$ 0.57
Diluted income per share from continuing operations, net of tax	$ 3.06	$ 2.13	$ 0.57

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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