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BUSINESS COMBINATIONS (Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Jun. 30, 2017
Sep. 30, 2016
Jul. 02, 2016
Business Acquisition [Line Items]        
Goodwill $ 860,865 $ 851,282 $ 854,188  
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