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Goodwill and Intangible Assets - Intangible Assets (Detail) (USD $)
 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2013
Minimum [Member]
Jun. 30, 2013
Maximum [Member]
Jun. 30, 2013
Trademark [Member]
Dec. 31, 2012
Trademark [Member]
Jun. 30, 2013
Trademark [Member]
Minimum [Member]
Jun. 30, 2013
Trademark [Member]
Maximum [Member]
Jun. 30, 2013
Customer Base [Member]
Dec. 31, 2012
Customer Base [Member]
Jun. 30, 2013
Customer Base [Member]
Minimum [Member]
Jun. 30, 2013
Customer Base [Member]
Maximum [Member]
Jun. 30, 2013
Domain Names [Member]
Dec. 31, 2012
Domain Names [Member]
Jun. 30, 2013
Domain Names [Member]
Maximum [Member]
Jun. 30, 2013
Software [Member]
Dec. 31, 2012
Software [Member]
Jun. 30, 2013
Software [Member]
Maximum [Member]
Jun. 30, 2013
Technology [Member]
Dec. 31, 2012
Technology [Member]
Jun. 30, 2013
Technology [Member]
Minimum [Member]
Jun. 30, 2013
Technology [Member]
Maximum [Member]
Jun. 30, 2013
Technology and Know-How [Member]
Dec. 31, 2012
Technology and Know-How [Member]
Jun. 30, 2013
Technology and Know-How [Member]
Maximum [Member]
Jun. 30, 2013
Non-compete Agreements [Member]
Dec. 31, 2012
Non-compete Agreements [Member]
Jun. 30, 2013
Non-compete Agreements [Member]
Maximum [Member]
Jun. 30, 2013
Internally Developed Software [Member]
Dec. 31, 2012
Internally Developed Software [Member]
Jun. 30, 2013
Internally Developed Software [Member]
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]                                                              
Intangible assets, estimated life     1 year 7 years     1 year 5 years     5 years 7 years     5 years     4 years     4 years 6 years     3 years     5 years     3 years
Gross Carrying Amount $ 13,284,285 $ 12,451,680     $ 665,844 $ 665,844     $ 3,789,117 $ 3,789,117     $ 891,076 $ 534,257   $ 298,977 $ 298,977   $ 2,463,402 $ 2,463,402     $ 3,176,431 $ 3,256,803   $ 161,691 $ 161,691   $ 1,837,747 $ 1,281,589  
Accumulated Amortization 7,288,772 6,083,656     665,844 665,844     1,674,063 1,447,297     257,020 137,378   298,977 298,977   1,708,114 1,580,896     2,067,097 1,576,600   21,407 8,721   596,250 367,943  
Net Carrying Amount $ 5,995,513 $ 6,368,024             $ 2,115,054 $ 2,341,820     $ 634,056 $ 396,879         $ 755,288 $ 882,506     $ 1,109,334 $ 1,680,203   $ 140,284 $ 152,970   $ 1,241,497 $ 913,646