Note 1 - Description of Business (Detail) - Business Acquisitions - Proforma Information (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Revenues	$ 976,621		$ 987,610
Net income(1)	$ 29,531	[1]	$ 69,923	[1]

[1] Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded as of January 1, 2010.