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ACQUISITION (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
MIJO Corporation ("MIJO") and Match Point
Jun. 30, 2010
MIJO Corporation ("MIJO") and Match Point
Jun. 30, 2011
MIJO Corporation ("MIJO") and Match Point
Jun. 30, 2010
MIJO Corporation ("MIJO") and Match Point
Jun. 30, 2011
MIJO Corporation ("MIJO")
Apr. 02, 2011
MIJO Corporation ("MIJO")
Jun. 30, 2011
MIJO Corporation ("MIJO")
Customer relationships
Apr. 02, 2011
MIJO Corporation ("MIJO")
Customer relationships
Jun. 30, 2011
MIJO Corporation ("MIJO")
Tradename
Apr. 02, 2011
MIJO Corporation ("MIJO")
Tradename
Jun. 30, 2011
MIJO Corporation ("MIJO")
Developed technology
Apr. 02, 2011
MIJO Corporation ("MIJO")
Developed technology
Jun. 30, 2011
MIJO Corporation ("MIJO")
Noncompetition agreements
Apr. 02, 2011
MIJO Corporation ("MIJO")
Noncompetition agreements
Acquisition                                    
Purchase consideration paid                   $ 43,800,000                
Working capital payment                   2,400,000                
Preliminary purchase price allocation                                    
Current assets                   5,100,000                
Property and equipment                   6,800,000                
Amortizable intangible assets                       8,500,000   2,900,000   2,100,000   2,400,000
Goodwill                   17,500,000                
Total assets acquired                   45,300,000                
Less liabilities assumed                   (1,500,000)                
Net assets acquired                   43,800,000                
Acquired intangible assets, weighted average term (in years)                     15   10   6   3  
Revenue recognized                 5,300,000                  
Recognized income before income tax                 1,000,000                  
As Reported Information                                    
Revenue 67,852,000 58,190,000 131,362,000 110,521,000 67,852,000 58,190,000 131,362,000 110,521,000                    
Income from continuing operations 10,498,000 8,830,000 23,386,000 16,708,000 10,498,000 8,830,000 23,386,000 16,708,000                    
Income per share - continuing operations: Basic (in dollars per share) $ 0.38 $ 0.31 $ 0.84 $ 0.63 $ 0.38 $ 0.31 $ 0.84 $ 0.63                    
Income per share - continuing operations: Diluted (in dollars per share) $ 0.38 $ 0.31 $ 0.83 $ 0.62 $ 0.38 $ 0.31 $ 0.83 $ 0.62                    
Pro Forma Information                                    
Revenue     181,200,000 165,400,000 67,852,000 66,822,000 136,539,000 128,146,000                    
Net income from continuing operations         $ 10,498,000 $ 9,263,000 $ 23,657,000 $ 17,051,000                    
Income per share - continuing operations: Basic (in dollars per share).         $ 0.38 $ 0.33 $ 0.85 $ 0.65                    
Income per share - continuing operations: Diluted (in dollars per share).         $ 0.38 $ 0.33 $ 0.84 $ 0.64