Note 1 - General (Detail) - Business Acquisitions - Proforma Information (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenues	$ 257,531		$ 245,532		$ 491,871		$ 467,161
Net income(1)	$ 11,498	[1]	$ 11,242	[1]	$ 19,546	[1]	$ 14,628	[1]

[1] Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded as of January 1, of the year preceding the respective acquisition date.