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Debt - Aggregate maturities of long-term debt (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Debt Disclosure [Abstract]    
2018 $ 6,250  
2019 12,500  
2020 12,500  
2021 18,750  
2022 200,000  
Total $ 250,000 $ 284,207