| 
           TDX GROUP ACQUISITION - Additional Information (Detail) (Tdx Group [Member], USD $) 
        In Millions, unless otherwise specified  | 
        1 Months Ended | 
|---|---|
| 
           Jan. 15, 2014 
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      |
| 
           Tdx Group [Member] 
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        |
| Business acquisition, percentage of voting interests acquired | 100.00% | 
| Business acquisition purchase price | $ 322.8 | 
| X | ||||||||||
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- Definition 
          Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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