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Summary Of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
Client
Jun. 30, 2016
USD ($)
Client
Jun. 30, 2015
USD ($)
Client
Asset Impairment Charges   $ 5,700 $ 0 $ 0
Investigator fees   $ 408,800 397,100 461,000
Number of counterparties in derivative contracts   7    
Capitalized software costs, net   $ 172,900 174,800  
Capitalized software expense   45,700 43,200 38,700
Capitalized software future amortization expense, 2017   45,500    
Capitalized software future amortization expense, 2018   37,400    
Capitalized software future amortization expense, 2019   27,900    
Capitalized software future amortization expense, 2020   17,700    
Capitalized software future amortization expense, 2021   6,200    
Research and development expense   17,800 19,200 24,000
Transaction (losses) gains   $ (4,000) $ (500) $ 7,000
Office Furniture, Fixtures And Equipment [Member]        
Estimated useful lives, years   5 years    
Minimum [Member]        
Marketable Securities Maturity Period   90 days    
Intangible asset, useful life   1 year    
Minimum [Member] | Computer Software And Hardware [Member]        
Estimated useful lives, years   3 years    
Maximum [Member]        
Marketable Securities Maturity Period   1 year    
Intangible asset, useful life   15 years    
Maximum [Member] | Computer Software And Hardware [Member]        
Estimated useful lives, years   8 years    
Sales Revenue, Services, Net [Member]        
Concentration risk, number of clients | Client   1 1 1
Sales Revenue, Services, Net [Member] | Customer A [Member]        
Concentration risk, percentage   12.00% 13.00% 14.00%
Accounts Receivable [Member]        
Concentration risk, number of clients | Client   1    
Accounts Receivable [Member] | Customer A [Member]        
Concentration risk, percentage   12.00%    
Additional Paid-in Capital [Member]        
Cumulative Effect on Retained Earnings, before Tax $ 600