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Acquisitions (Details 2) (Maverick [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Maverick [Member]
Summary of Pro Forma Information
Revenues	$ 596,863
Net income	$ 1,223
Earnings per common share - basic	$ 0.03
Earnings per common share - diluted	$ 0.03

- 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