Annual report pursuant to Section 13 and 15(d)

Acquisitions (Pro Forma) (Details)

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Acquisitions (Pro Forma) (Details) (HCT [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2011
HCT [Member]
   
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]    
Revenue since acquisition date, actual $ 1,270  
Earnings since acquisition date, actual (58)  
Pro forma revenue (unaudited)   206,968
Pro forma earnings (unaudited)   $ 37,534