Note 1 - General (Details) - Business Acquisitions - Proforma Information (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Business Acquisitions - Proforma Information [Abstract]
Revenues		[1]	$ 316,984		$ 885,842		$ 905,282
Net income (loss)		[1]	$ 22,401	[2]	$ 40,889	[2]	$ 44,758	[2]

[1] Amounts are presented in the unaudited consolidated statement of operations for the quarter ended September 30, 2013.

[2] 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.