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Fair Value Measurements - Changes in Fair Value of Level 3 Contingent Consideration (Details) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Contingent consideration [Roll Forward]    
Balance at beginning of period $ 61,535 $ 1,700
Additions due to acquisitions 0 33,135
Payments (288) 0
Changes in present value of contingent consideration (140) (1,100)
Balance at end of period $ 61,107 $ 33,735