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Acquisitions - Summary Pro Forma Combined Statement of Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Business Combinations [Abstract]    
Pro forma total revenues $ 22,951 $ 46,572
Pro forma income from operations 6,405 15,691
Pro forma net income $ 15,722 [1] $ 19,748 [1]
[1] This amount does not include a pro forma income tax provision relating to becoming subject to income taxes as a result of the Merger.