Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies- Commitments as a Result of Acquisitions (Details)

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Commitments and Contingencies- Commitments as a Result of Acquisitions (Details) - Jun. 30, 2015
$ in Thousands
USD ($)
GBP (£)
EEX    
Loss Contingencies [Line Items]    
Business combination, contingent consideration arrangements, range of outcomes, value, high $ 7,073 £ 4,500,000