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BUSINESS COMBINATIONS (Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Nov. 01, 2017
Jun. 30, 2017
Dec. 31, 2016
Jul. 02, 2016
Business Acquisition [Line Items]          
Goodwill $ 832,943   $ 829,086 $ 832,642  
Association Of Certified Anti-Money Laundering Specialists [Member]          
Business Acquisition [Line Items]          
Current Assets         $ 24,895
Property and Equipment         432
Other Long-term Assets         3,131
Intangible Assets         88,600
Goodwill         274,689
Total Assets Acquired         391,747
Liabilities Assumed         37,619
Net Assets Acquired         $ 354,128
Sao Judas Tadeu [Member]          
Business Acquisition [Line Items]          
Current Assets   $ 558      
Property and Equipment   16      
Other Long-term Assets   1,838      
Goodwill   4,121      
Total Assets Acquired   6,533      
Liabilities Assumed   569      
Net Assets Acquired   $ 5,964