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Long-term Debt - Cash Flow Hedges (Detail 2) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Long Term Debt [Abstract]    
Gain (loss) recognized in other comprehensive income $ (346) $ 605
Amounts reclassified to earnings from accumulated other comprehensive loss 854 2,249
Net current period other comprehensive income $ 508 $ 2,854