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Acquisitions (Summary Of Pro-Forma Information) (Details) (Maverick [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2011
Maverick [Member]
Business Acquisition [Line Items]
Revenues	$ 265,846
Net income	$ (18,456)
Earnings per common share - basic	$ (0.46)
Earnings per common share - diluted	$ (0.46)

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details