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Business Segments - Business Segment Information Based on Net Revenues and Net Income from Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Revenues    
Total net revenue $ 38,350 $ 29,646
Income from operations    
Total income from operations 3,298 3,173
Operating Segments [Member] | Workforce Development [Member]
   
Revenues    
Total net revenue 30,957 23,140
Income from operations    
Total income from operations 7,880 6,816
Operating Segments [Member] | Research/Patient Experience [Member]
   
Revenues    
Total net revenue 7,393 6,506
Income from operations    
Total income from operations 178 301
Unallocated [Member]
   
Income from operations    
Total income from operations $ (4,760) $ (3,944)