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Financial Instruments Measured At Fair Value (Summary Of Level 3 Activity) (Details) - 3 months ended Sep. 30, 2016
£ in Thousands, $ in Thousands
GBP (£)
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance as of June 30, 2016   $ 3,553
Contingent consideration adjustment | £ £ 526  
Payment of contingent consideration | £ £ (2,498)  
Translation adjustment   9
Balance as of September 30, 2016   $ 1,590