Note 1 - General (Detail) - Business Acquisitions - Proforma Information (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Revenues	$ 265,155		$ 261,029		$ 757,027		$ 728,190
Net income(1)	$ 19,544	[1]	$ 4,210	[1]	$ 39,090	[1]	$ 18,837	[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.