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Intangible Assets - Expected Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Jun. 30, 2017
Finite Lived Intangible Assets Net [Abstract]    
2018 (six months) $ 18,854  
2019 34,257  
2020 29,651  
2021 26,190  
2022 22,613  
Thereafter 112,507  
Total intangible assets, net $ 244,072 [1] $ 235,371
[1] During the six months ended December 31, 2017, the Company wrote off $250.7 million in fully amortized intangible assets.