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Long-term Debt - Cash Flow Hedges (Detail 2) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Long Term Debt [Abstract]    
Gain (loss) recognized in other comprehensive income $ 1,025 $ (346)
Amounts reclassified to earnings from accumulated other comprehensive loss (808) 854
Net current period other comprehensive income $ 217 $ 508